Summary of the invention
The present invention is proposed in view of the above problem.The present invention provides a kind of circuit for controlling motor and motor control sides
Method.
According to an aspect of the present invention, a kind of circuit for controlling motor is provided.The circuit for controlling motor includes: one or more
Adjustable signal output circuit, for the adjustable signal output circuit for exporting adjustable signal, the size of the adjustable signal can
The variation of situation is adjusted with the optics of camera lens and is changed;And one or more driving circuits, and it is one or more of adjustable
Signal output apparatus connects one to one, and the driving circuit is raw using the adjustable signal for receiving the adjustable signal
At driving signal, and the driving signal is exported for driving corresponding camera lens motor to operate.
The circuit for controlling motor further comprises the processing connecting with one or more of adjustable signal output circuits
Device, the adjustable signal output circuit include DC-DC circuit,
The processor adjusts shape for exporting initial signal to the adjustable signal output circuit, and according to the optics
The size for being sized such that the adjustable signal that condition adjusts the initial signal can adjust the variation of situation with the optics
And change;
The DC-DC circuit is converted to the initial signal described adjustable for receiving the initial signal
Signal.
Illustratively, one adjustable signal output circuit is zoom signal output circuit, and the initial signal is to become
Burnt initial signal, the adjustable signal are zoom adjustable signals, and one driving circuit is zoom drive circuit, the camera lens
Motor is zoom motor, and the optics adjusts the zoom condition that situation is the camera lens.
Illustratively, the zoom condition and target object ratio occupied in the image that the camera lens acquires are opposite
It answers, the processor is further used for executing zoom operation, and the zoom operation includes: at the beginning of exporting the zoom of initial size
It is occupied in the image that the camera lens acquires to monitor the target object to start to drive the zoom motor to operate for beginning signal
Ratio, the zoom initial signal is adjusted according to target object ratio occupied in the image that the camera lens acquires
Size, and when the target object in the image that the camera lens acquire occupied by ratio be within the scope of preset ratio
When, stop exporting the zoom initial signal to stop driving the zoom motor to operate.
Illustratively, the processor is in the following manner according to the target object in the image that the camera lens acquires
Occupied ratio adjusts the size of the zoom initial signal:
When the target object in the image that the camera lens acquires occupied ratio and the preset ratio range it
Between gap when being greater than default zoom gap, the size of the zoom initial signal is set as the first zoom preset value, and
When gap of the target object between ratio and the preset ratio range occupied in the image that the camera lens acquires
When less than or equal to the default zoom gap, the size of the zoom initial signal is set as the second zoom preset value.
Illustratively, the processor is in the following manner according to the target object in the image that the camera lens acquires
Occupied ratio adjusts the size of the zoom initial signal:
With the target object ratio and the preset ratio range occupied in the image that the camera lens acquires
Between gap reduce and reduce the zoom initial signal, or the image acquired with the target object in the camera lens
In gap between occupied ratio and the preset ratio range reduce and increase the zoom initial signal.
Illustratively, the processor is further used for stopping exporting the zoom initial signal to stop described in driving
After zoom motor operating, following steps are executed until detecting that the target object is shared in the image that the camera lens acquires
According to ratio be within the scope of the preset ratio until: it is shared in the image that the camera lens acquires to detect the target object
According to ratio, if target object ratio occupied in the image that the camera lens acquires is in the preset ratio model
Outside enclosing, then the zoom operation is re-executed.
Illustratively, one adjustable signal output circuit is focus signal output circuit, and the initial signal is poly-
Burnt initial signal, the adjustable signal are to focus adjustable signal, and one driving circuit is focus drive circuit, the camera lens
Motor is focus motor, and the optics adjusts the exposing condition that situation is the camera lens.
Illustratively, the exposing condition is corresponding with the clarity for the image that the camera lens acquires, the processor into
One step includes: to export the focusing initial signal of initial size to start to drive for executing focusing operation, the focusing operation
The focus motor operating is moved, the clarity of the image of the camera lens acquisition is monitored, according to the clear of the image of camera lens acquisition
Clear degree adjusts the size for focusing initial signal, and when the clarity of the image of camera lens acquisition is greater than or equal to clearly
When spending threshold value, stop exporting the focusing initial signal to stop driving the focus motor to operate.
Illustratively, described in the clarity adjustment for the image that the processor is acquired according to the camera lens in the following manner
Focus the size of initial signal:
When the gap between the clarity and the clarity threshold of the image of camera lens acquisition is poor greater than default focusing
Away from when, the size for focusing initial signal is set as the first focusing preset value, and when the image of camera lens acquisition
When gap between clarity and the clarity threshold is less than or equal to the default focusing gap, by the initial letter of the focusing
Number size be set as the second focusing preset value.
Illustratively, described in the clarity adjustment for the image that the processor is acquired according to the camera lens in the following manner
Focus the size of initial signal:
As the gap between the clarity and the clarity threshold of the image of camera lens acquisition reduces and reduce institute
Focusing initial signal is stated, or as the gap between the clarity and the clarity threshold of the image of camera lens acquisition subtracts
It is small and increase the focusing initial signal.
Illustratively, the processor is further used for stopping exporting the focusing initial signal to stop described in driving
After focus motor operating, following steps are executed until detecting that the clarity of the image of the camera lens acquisition is greater than or equal to institute
Until stating clarity threshold: the clarity of the image of the camera lens acquisition is detected, if the image of camera lens acquisition is clear
Degree is less than the clarity threshold, then re-executes the focusing operation.
Illustratively, the multiple adjustable signal output circuit includes zoom signal output circuit and focus signal output electricity
Road, the initial signal include zoom initial signal and focus initial signal, the adjustable signal include zoom adjustable signal and
Adjustable signal is focused, the multiple driving circuit includes zoom drive circuit and focus drive circuit, and the camera lens motor includes
Zoom motor and focus motor, the optics adjusting situation of the camera lens include the zoom condition of the camera lens and gathering for the camera lens
Coke-like condition.
Illustratively, the zoom condition and target object ratio occupied in the image that the camera lens acquires are opposite
It answers, the exposing condition is corresponding with the clarity for the image that the camera lens acquires,
The processor is further used for executing zoom operation and focusing operation, and the zoom operation includes: that output is initial
The zoom initial signal of size monitors the target object and adopts in the camera lens to start to drive the zoom motor to operate
Occupied ratio in the image of collection is adjusted according to target object ratio occupied in the image that the camera lens acquires
The size of the zoom initial signal, and at target object ratio occupied in the image that the camera lens acquires
When within the scope of preset ratio, stop exporting the zoom initial signal to stop driving the zoom motor to operate;
The focusing operation includes: to stop exporting the zoom initial signal to stop driving the zoom motor to operate
Later, the focusing initial signal of initial size is exported to start to drive the focus motor to operate, and is monitored the camera lens and is adopted
The clarity of the image of collection adjusts the size for focusing initial signal according to the clarity of the image of camera lens acquisition, and
And when the clarity of the image of camera lens acquisition is greater than or equal to clarity threshold, stop exporting the focusing initial signal
To stop driving the focus motor operating.
Illustratively, the initial signal is pulse-width signal, and the DC-DC circuit includes DC-DC core
Piece and its peripheral circuit, the peripheral circuit include filter resistance, filter capacitor, the first divider resistance and the second divider resistance,
The first end of the filter resistance connects the filter capacitor for receiving the initial signal, the second end of the filter resistance
First end, the filter capacitor second end ground connection;The first end connection of first divider resistance the second partial pressure electricity
The first end of resistance, and directly or connect the node that the filter resistance is connect with the filter capacitor via additional resistance, it is described
The second end of first divider resistance is grounded, and the second end of second divider resistance is for exporting the adjustable signal;It is described straight
Stream-direct current chip feedback port connects the node that first divider resistance is connect with second divider resistance, described straight
Stream-direct current chip output switching terminal mouth connects the second end of second divider resistance via outputting inductance.
Illustratively, the processor adjusts the big of the initial signal by changing the duty ratio of the initial signal
It is small.
Illustratively, the initial signal is digital signal, the DC-DC circuit include DC-DC chip and
Its peripheral circuit, the peripheral circuit include D/A converting circuit, the first divider resistance and the second divider resistance, and the modulus turns
The input terminal of circuit is changed for receiving the initial signal and the initial signal being converted to analog signal;First partial pressure
The first end of resistance connects the first end of second divider resistance, and directly or via additional resistance connects the analog-to-digital conversion
The output end of circuit, the second end ground connection of first divider resistance, the second end of second divider resistance is for exporting institute
State adjustable signal;The feedback port of the DC-DC chip connects first divider resistance and second divider resistance
The output switching terminal mouth of the node of connection, the DC-DC chip connects second divider resistance via outputting inductance
Second end.
Illustratively, the driving circuit includes H-bridge drive circuit.
Illustratively, the H-bridge drive circuit is realized using H bridge chip.
Illustratively, the H-bridge drive circuit is realized using discrete transistor.
According to a further aspect of the invention, a kind of motor control method is provided.The motor control method includes: the adjustable letter of output
Number, the size of the adjustable signal can adjust the variation of situation with the optics of camera lens and change;It is raw using the adjustable signal
At driving signal;And the output driving signal is for driving corresponding camera lens motor to operate.
Illustratively, the initial signal is zoom initial signal, and the adjustable signal is zoom adjustable signal, the mirror
Head motor is zoom motor, and the optics adjusts the zoom condition that situation is the camera lens.
Illustratively, the zoom condition and target object ratio occupied in the image that the camera lens acquires are opposite
It answers, the output initial signal simultaneously adjusts situation according to the optics to adjust being sized such that for the initial signal described adjustable
The size of signal can with the optics adjust situation variation and change include: export initial size the zoom initially believe
Number to start to drive the zoom motor to operate;Monitor target object ratio occupied in the image that the camera lens acquires
Example;According to the target object, ratio occupied in the image that the camera lens acquires adjusts the big of the zoom initial signal
It is small;And when target object ratio occupied in the image that the camera lens acquires is within the scope of preset ratio,
Stop exporting the zoom initial signal to stop driving the zoom motor to operate.
Illustratively, the initial signal is to focus initial signal, and the adjustable signal is to focus adjustable signal, the mirror
Head motor is focus motor, and the optics adjusts the exposing condition that situation is the camera lens.
Illustratively, the exposing condition is corresponding with the clarity for the image that the camera lens acquires, and the output is initial
Signal is simultaneously sized such that the size of the adjustable signal can according to what the optics adjusted that situation adjusts the initial signal
Adjusting the variation of situation with the optics and change includes: to export the focusing initial signal of initial size to start to drive institute
State focus motor operating;Monitor the clarity of the image of the camera lens acquisition;According to the clarity of the image of camera lens acquisition
Adjust the size for focusing initial signal;And when the clarity of the image of camera lens acquisition is greater than or equal to clarity threshold
When value, stop exporting the focusing initial signal to stop driving the focus motor to operate.
Illustratively, the initial signal includes zoom initial signal and focuses initial signal, and the adjustable signal includes
Zoom adjustable signal and focusing adjustable signal, the camera lens motor includes zoom motor and focus motor, the optics of the camera lens
Adjusting situation includes the zoom condition of the camera lens and the exposing condition of the camera lens.
Illustratively, the zoom condition and target object ratio occupied in the image that the camera lens acquires are opposite
It answers, the exposing condition is corresponding with the clarity for the image that the camera lens acquires, the output initial signal and according to described
The size for being sized such that the adjustable signal that optics adjusting situation adjusts the initial signal can be adjusted with the optics
The variation of situation and to change include: to export the zoom initial signal of initial size to start to drive the zoom motor to transport
Turn;Monitor target object ratio occupied in the image that the camera lens acquires;According to the target object described
Occupied ratio adjusts the size of the zoom initial signal in the image of camera lens acquisition;When the target object is in the mirror
When occupied ratio is within the scope of preset ratio in the image of head acquisition, stop exporting the zoom initial signal to stop
The zoom motor is driven to operate;The focusing initial signal of initial size is exported to start to drive the focus motor to transport
Turn;Monitor the clarity of the image of the camera lens acquisition;The focusing is adjusted according to the clarity of the image of camera lens acquisition
The size of initial signal;And when the clarity of the image of camera lens acquisition is greater than or equal to clarity threshold, stop defeated
The focusing initial signal is out to stop driving the focus motor to operate.
The circuit for controlling motor and motor control method that there is provided according to embodiments of the present invention, can be that can adjust in real time
Voltage rather than constant pressure driving camera lens motor operating.The optics degree of regulation that camera lens not only can be improved, greatly shortens optics
The time of adjusting, and the complexity of entire optics adjustment process, the especially complexity of algorithm can be reduced simultaneously, to make
The optics adjustment process of camera lens has qualitative leap.
Specific embodiment
In order to enable the object, technical solutions and advantages of the present invention become apparent, root is described in detail below with reference to accompanying drawings
According to example embodiments of the present invention.Obviously, described embodiment is only a part of the embodiments of the present invention, rather than this hair
Bright whole embodiments, it should be appreciated that the present invention is not limited by example embodiment described herein.Based on described in the present invention
The embodiment of the present invention, those skilled in the art's obtained all other embodiment in the case where not making the creative labor
It should all fall under the scope of the present invention.
In order to solve the problems, such as that the velocity of rotation of camera lens motor can not change according to demand, the present invention proposes that one kind can give birth to
At variable driving voltage rather than the circuit for controlling motor of constant drive voltage.
According to an aspect of the present invention, a kind of circuit for controlling motor is provided.Circuit for controlling motor includes one or more adjustable
Signal output apparatus and the one or more driving circuits to connect one to one with one or more adjustable signal output circuits.Show
Example property, the camera lens motor of camera lens may include zoom motor and focus motor, be respectively used to realize the zoom function of camera lens and
Focusing function.Zoom is similar with the basic principle of focusing, is all to drive eyeglass mould group mobile by corresponding motor operating, from
And realize zoom or focusing.Therefore, for the zoom motor of camera lens and focus motor, construction and work can be respectively adopted
Principle similar circuit drives.In circuit for controlling motor, an adjustable signal output circuit is corresponding with a driving circuit
Connection, may be constructed the control circuit of a motor.In one example, circuit for controlling motor includes an adjustable signal output
Circuit and a driving circuit, constitute a control circuit, can be used for controlling the operating of zoom motor, the focus motor of camera lens
It can then be controlled using conventional circuit.In another example, circuit for controlling motor includes an adjustable signal output circuit
With a driving circuit, a control circuit is constituted, can be used for controlling the operating of focus motor, the zoom motor of camera lens then may be used
To be controlled using conventional circuit.In another example, circuit for controlling motor includes two adjustable signal output circuits and two
A driving circuit constitutes two control circuits, is respectively used to the operating of control zoom motor and focus motor.Certainly, above-mentioned electricity
The circuit configuration of machine control circuit is only exemplary rather than limitation of the present invention, and circuit for controlling motor of the invention is not limited to
State implementation.
Fig. 2 shows the schematic block diagrams of circuit for controlling motor 200 according to an embodiment of the invention.For sake of simplicity, Fig. 2
One adjustable signal output circuit and a driving circuit are only shown.Fig. 2 shows adjustable signal output circuit and driving circuit
It can be zoom signal output circuit relevant to zoom motor and zoom drive circuit, be also possible to relevant to focus motor
Focus signal output circuit and focus drive circuit.By introducing adjustable signal output circuit 210 and driving circuit shown in Fig. 2
220 construction and working principle, it will be appreciated by those skilled in the art that zoom signal output circuit, focus signal output circuit,
The construction and working principle of zoom drive circuit and focus drive circuit.
As shown in Fig. 2, circuit for controlling motor 200 includes the adjustable signal output circuit 210 and driving circuit interconnected
220.Adjustable signal output circuit 210 can adjust shape with the optics of camera lens for exporting adjustable signal, the size of adjustable signal
The variation of condition and change.Driving circuit 220 generates driving signal for receiving adjustable signal, using adjustable signal, and exports drive
Dynamic signal is for driving corresponding camera lens motor to operate.
Driving circuit 220 can be connected with corresponding camera lens motor.In the case where camera lens motor is zoom motor, driving
Circuit 220 is zoom drive circuit, and adjustable signal output circuit 210 is zoom signal output circuit;It is to focus in camera lens motor
In the case where motor, driving circuit 220 is focus drive circuit, and adjustable signal output circuit 210 is focus signal output circuit.
Driving circuit 220 can be using any suitable existing or motor-drive circuit in the cards (such as H bridge driving electricity in the future
Road) it realizes, the present invention limits not to this.Driving circuit 220 in such a way that driving signal drives camera lens motor with conventional skill
Art is similar, is repeated herein not to this.Unlike the prior art, driving signal is determined by adjustable signal, therefore
In the case where adjustable signal is variable, driving signal is also variable, therefore be can be realized using variable adjustable signal with non-
Uniform speed rotates camera lens motor, also can be with the eyeglass mould of speed moving lens (such as telephoto lens) heterogeneous
Group.
It is appreciated that carrying out optics adjusting to camera lens may include carrying out zoom and/or focusing to camera lens.The optics of camera lens
Adjusting situation may include the zoom condition of camera lens, i.e. the camera lens gap with target focal length when zooming.Illustratively, camera lens
Zoom condition can be reflected with target object ratio occupied in the image that camera lens acquires, that is to say, that the change of camera lens
Coke-like condition and target object ratio occupied in the image that camera lens acquires are corresponding.Hereafter for convenience of description, " mesh is used sometimes
Mark object proportion " replaces " target object in the image that camera lens acquire occupied ratio ", their expressions are identical
Meaning.Target object refers to the object that needs monitor, such as the objects such as house, trees that fire behavior occurs, and target object can also be with
It is certain block monitoring area.The optics of camera lens adjusts the exposing condition that situation can also include camera lens, i.e., camera lens when focusing with
The gap of target sharpness.Illustratively, the exposing condition of camera lens can be reflected with the clarity of the image of camera lens acquisition,
That is the exposing condition of camera lens is corresponding with the clarity for the image that camera lens acquires.
Illustratively, adjustable signal is voltage signal, and the voltage value of the voltage signal can adjust shape with the optics of camera lens
The variation of condition and change.For example, adjustable signal output circuit 210 can export larger when just starting zoom or focusing
Voltage (the i.e. described adjustable signal) so that driving circuit 220 generates biggish driving voltage (the i.e. described driving signal), thus
Driving camera lens motor more quickly operates;It is close in the clarity of focal length close to the target focal length or the image of camera lens acquisition of camera lens
When target sharpness, adjustable signal output circuit 210 can export lesser voltage so that driving circuit 220 generate it is lesser
Driving voltage, to operate with driving camera lens motor relatively slower.
As described above, the zoom of camera lens and focusing function are realized by the way that the position of eyeglass mould group is mobile, and mirror
Head motor is exactly to play the role of mobile eyeglass mould group.The relevant design in industry is the function for realizing zoom and focusing at present
Can, but since constant voltage drive circuit can not adjust the revolving speed of camera lens motor in real time, optics adjustment process it is relatively slow and
Optics degree of regulation is poor.And circuit for controlling motor according to an embodiment of the present invention is due to that can adjust situation with the optics of camera lens
Change and adjustable signal and then change driving signal, therefore compared with prior art, can make optics adjustment process accelerate and
Optics degree of regulation can be improved.It is described below in detail.
Firstly, since zoom or to focus (mainly zoom) process rotation path longer, therefore allow electricity early period at this stage
Machine quickly rotates the pictaresque time that can save target object, and finishing phase rotate by motor relatively can then reduce slowly by
Problem is unsatisfied in the pictaresque effect of motor inertia bring, improves the First Pass Yield of zoom or focusing.It in this way can be further
Shorten zoom or focal time while optimizing zoom or focusing effect.These careful operations are all conventional constant pressure drivings
What circuit can not be accomplished.
Secondly, motor rotation due to inertia, can continue to walk after driving circuit shutdown it is a bit of, so that optics be caused to miss
Difference.Such case itself can not be eradicated, and can be generally minimized error using the methods of feedback calibration in industry.It is this anti-
Although feedback adjusting method can reduce this optical parallax, algorithm itself is complicated.And different camera lenses are due to the difference of damped coefficient
Different, it is impossible to be use universally, and feedback system constantly regulate the time that also will increase optics adjustment process.Implemented using the present invention
The circuit for controlling motor that example provides can reduce adjustment speed in the period that optics adjustment process will finish up, to reduce
Due to inertia bring optical parallax, when optics degree of regulation, which not only can be improved, can also save valuable optics adjusting
Between.
Generally speaking, due to adjustable signal output circuit 210 output can with the optics of camera lens adjust situation variation and
The adjustable signal of variation, thus can with the voltage that can adjust in real time rather than constant pressure driving camera lens motor operating.So not only
The optics degree of regulation that camera lens can be improved, greatly shortens the time of optics adjusting, and can reduce entire optics tune simultaneously
The complexity of the complexity of section process, especially algorithm, so that making the optics adjustment process of camera lens has qualitative leap.
According to an embodiment of the present invention, circuit for controlling motor may further include processor, adjustable signal output electricity
Road may include DC-DC circuit.Fig. 3 shows the schematic frame of circuit for controlling motor 300 in accordance with another embodiment of the present invention
Figure.As shown in figure 3, circuit for controlling motor 300 includes processor 310, adjustable signal output circuit 320 includes DC-DC circuit
322。
Processor 310 is connect with one or more adjustable signal output circuits 320, for exporting initial signal to adjustable letter
Number output circuit 320, and adjust according to the optics size energy for being sized such that adjustable signal of situation adjustment initial signal
It is enough to adjust the variation of situation with the optics and change.DC-DC circuit 322 turns for receiving initial signal, and by initial signal
It is changed to adjustable signal.DC-DC circuit 322 can be the circuit using conventional DC-DC chip composition.
Illustratively, initial signal can be pulsewidth modulation (PWM) signal or digital signal or other any suitable letters
Number.It is understood that can easily generate the initial signal of desired size by processor, such as can be using volume
Journey mode indicates that processor generates the initial signal of desired size.In addition, being commonly equipped in conventional lens module ready-made
Processor, the ready-made processor can be directly used to generate required initial signal.It therefore, can using processor control
The size for the signal for adjusting signal output apparatus to generate and then the operating for indirectly controlling camera lens motor be it is a kind of simple, be easily achieved,
Efficient method.
Certainly, it is to be understood that above-mentioned processor is only exemplary rather than limitation of the present invention, and the present invention can use
Any suitable device for having signal handling capacity, device or circuitry instead processor realize corresponding function, such as can adopt
It is realized with Field Programmable Logic Array (FPGA), special integrated chip (ASIC), digital signal processing circuit (DSP) etc..
As described above, driving signal is to be determined by adjustable signal, therefore in the case where adjustable signal is variable, drive
Signal is also variable.In addition, in the present embodiment, since adjustable signal is again related to initial signal, by adjusting just
The size of beginning signal can finally change the size of driving signal, electric to rotate camera lens with speed heterogeneous so as to realize
Machine.
According to an embodiment of the present invention, the circuit for controlling motor includes an adjustable signal output circuit 320, this can
Adjusting signal output apparatus 320 is zoom signal output circuit, and initial signal is zoom initial signal, and adjustable signal is that zoom is adjustable
Signal, a driving circuit 330 are zoom drive circuits, and camera lens motor is zoom motor, and optics adjusts the change that situation is camera lens
Coke-like condition.
As described above, an adjustable signal circuit is correspondingly connected with a driving circuit, may be constructed a motor
Control circuit can be used for controlling zoom or the focusing of camera lens.In the case where camera lens motor is zoom motor, corresponding drive
Dynamic circuit 330 is zoom drive circuit, and corresponding adjustable signal output circuit 320 is zoom signal output circuit.In this feelings
Under condition, processor 310 exports zoom initial signal to zoom signal output circuit 320, in zoom signal output circuit 320
DC-DC circuit 322 receives the zoom initial signal, and the zoom initial signal is converted to zoom adjustable signal.Zoom signal
Output circuit 322 exports zoom adjustable signal to zoom drive circuit 330, and zoom drive circuit 330 receives the adjustable letter of zoom
Number, zoom drive signal is generated using zoom adjustable signal, and zoom drive signal is exported to zoom motor to drive zoom
Motor operating.
Processor 310 can be sized such that the big of zoom adjustable signal according to zoom condition adjustment zoom initial signal
It is small to change with the variation of zoom condition.Zoom adjustable signal is converted by DC-DC circuit 322, zoom adjustable signal
Depending on zoom initial signal, it can change with the variation of zoom initial signal.Zoom drive signal is by zoom drive electricity
Road 330 (such as H-bridge drive circuit) is generated using zoom adjustable signal, and therefore, zoom drive signal again can be as zoom can
It adjusts the variation of signal and changes.Therefore, via zoom signal output circuit 320 and zoom drive circuit 330, processor 310 can
To control the size of zoom drive signal by zoom initial signal, and then control the operating of zoom motor.
According to an embodiment of the present invention, above-mentioned zoom condition and target object are occupied in the image that camera lens acquires
Ratio is corresponding, and processor 310 can be further used for executing zoom operation, and the zoom operation includes: output initial size
Zoom initial signal with start drive zoom motor operating, monitoring objective object in the image that camera lens acquire occupied by ratio
Example according to the size of target object ratio adjustment zoom initial signal occupied in the image that camera lens acquires, and works as mesh
When mark object ratio occupied in the image that the camera lens acquires is within the scope of preset ratio, it is initial to stop output zoom
Signal is to stop driving zoom motor operating.
It is occupied in the image that camera lens acquires by adjusting focal length (i.e. zoom) adjustable target object of camera lens
Ratio.For example, target object can be amplified to by suitable size by zoom first when fire behavior occurs, it is subsequent to carry out again
The operation such as focusing, to facilitate monitoring personnel to check.Target object (house that fire behavior such as occurs) is in the image of camera lens acquisition
It needs to occupy suitable ratio, if occupied ratio is too big, may be not easy the case where seeing clearly around target object, such as
Ratio occupied by fruit is too small, then may be not easy to see target object itself clearly.Therefore, desired, mesh can be preset
Object ratio occupied in the image that camera lens acquires is marked, can be a range, i.e., preset ratio model as described herein
It encloses.Preset ratio range can be any suitable range, and depending on can according to need, the present invention limits not to this.
For example, preset ratio range can be 40%~60%, i.e., if target object proportion is less than 40% or greater than 60%,
It may be considered that target object proportion is undesirable, zoom is needed, if target object proportion is greater than or equal to
40% and it is less than or equal to 60%, it, can be without zoom it may be considered that target object proportion meets the requirements.
When carrying out zoom operation, processor 310 can export the zoom initial signal of initial size first to start to drive
Dynamic zoom motor operating.The size of zoom initial signal exported when just starting zoom can according to circumstances depending on.Example
Property, zoom initial signal can be fixed value, i.e., starts zoom every time and all use an equal amount of zoom initial signal.Example
Property, zoom initial signal is also possible to revocable value, such as it can be according to target object proportion when beginning zoom
To determine.For example, if the gap between target object proportion and preset ratio range is smaller, then when starting zoom
Lesser zoom initial signal can be exported to operate with driving zoom motor relatively slower;, whereas if when starting zoom, mesh
The gap marked between object proportion and preset ratio range is larger, then can export biggish zoom initial signal to drive
Zoom motor more quickly operates.
In zooming procedure, target object ratio occupied in the image that camera lens acquires can be monitored in real time.It is described
Real time monitoring may include continuously monitoring or being monitored at a time interval.It is monitoring simultaneously, it can be according to target
Object ratio occupied in the image that camera lens acquires adjusts the size of zoom initial signal in real time.Adjust zoom initial signal
Mode can be continuous adjustment or the adjustment of stepping position, be introduced below in conjunction with specific embodiment, this will not be repeated here.
With the progress of zooming procedure, target object ratio occupied in the image that camera lens acquires can increasingly be connect
Nearly preset ratio range.When target object proportion is fallen within the scope of preset ratio, it is believed that target object proportion is full
Foot requires, that is, reaches pictaresque effect, can stop exporting zoom initial signal at this time, to stop driving zoom motor operating.Stop
Only output zoom initial signal is it can be appreciated that the signal that output size is zero.
By the above-mentioned means, processor 310 can adjust the running speed of zoom motor in real time in zooming procedure, such as
Zoom motor operating can be kept very fast in the zoom incipient stage, keep zoom motor operating slower in zoom finishing phase.It is this with
The mode of driving condition of zoom condition adjustment zoom motor can faster reach pictaresque effect, accelerate the process of zoom, can
To reduce due to motor inertia bring optical parallax.
According to an embodiment of the present invention, processor 310 can be acquired according to target object in camera lens in the following manner
Image in occupied ratio adjustment zoom initial signal size: when target object in the image that camera lens acquire occupied by
Ratio and preset ratio range between gap when being greater than default zoom gap, the size of zoom initial signal is set as the
One zoom preset value, and when target object is between ratio and preset ratio range occupied in the image that camera lens acquires
When gap is less than or equal to default zoom gap, the size of zoom initial signal is set as the second zoom preset value.
It can be seen from the foregoing, preset ratio range can be the range with maximum value and minimum value.In such case
Under, according to an example, difference of the target object between ratio and preset ratio range occupied in the image that camera lens acquires
Away from can determine in the following manner: when target object proportion is less than the minimum value in preset ratio range, by target
The difference (or percentage of target object proportion relative minimum) of object proportion and minimum value is considered as target object
Gap between ratio and preset ratio range occupied in the image of camera lens acquisition;When target object proportion is greater than
When maximum value in preset ratio range, by the difference of target object proportion and maximum value (or target object proportion
The percentage of relative maximum) be considered as target object ratio occupied in the image that camera lens acquires and preset ratio range it
Between gap.According to another example, preset ratio range can be determined according to the maximum value and minimum value of preset ratio range
Median, gap of the target object between ratio and preset ratio range occupied in the image that camera lens acquires can pass through
Following manner determines: by the difference of target object proportion and the median of preset ratio range (or target object institute accounting
The percentage of the opposite median of example) it is considered as target object ratio and preset ratio range occupied in the image that camera lens acquires
Between gap.Above-mentioned determining target object is between ratio and preset ratio range occupied in the image that camera lens acquires
The mode of gap is only exemplary rather than limitation, and the invention is not limited thereto.
Default zoom gap can be any suitable value, and depending on can according to need, the present invention is not limited it
System.For example, it is assumed that default zoom gap is 15%, preset ratio range is 40%~60%.Moreover, it is assumed that current object
Gap (difference i.e. maximum value 60% between) of the body proportion between 80%, with preset ratio range is 20%,
It is greater than default zoom gap 15%, and the size of zoom initial signal can be set as to the first zoom preset value at this time.With
Zoom motor operating, target object proportion is smaller and smaller, becomes closer to preset ratio range, when it reaches 75%,
Its gap (difference i.e. between maximum value 60%) between preset ratio range is 15%, is equal to default zoom gap
15%, the size of zoom initial signal can be set as to the second zoom preset value at this time.First zoom preset value and second becomes
Burnt preset value is different.The size of first zoom preset value and the second zoom preset value can be set as needed, and the present invention is not
This is limited.Illustratively, it is positively correlated (i.e. zoom adjustable signal covariant in zoom adjustable signal and zoom initial signal
The reduction of burnt initial signal and reduce) in the case where, the first zoom preset value can be greater than the second zoom preset value.Zoom can
The case where adjusting signal and zoom initial signal negatively correlated (i.e. zoom adjustable signal increases with the reduction of zoom initial signal)
Under, the first zoom preset value can be less than the second zoom preset value.
This mode may be considered a kind of stepping adjustment mode, and the size of zoom initial signal is divided into multiple shelves, passes through
Each grade of threshold value is set, at the beginning of gradually can adjusting zoom with the degree of target object proportion close to preset ratio range
The size of beginning signal.
Although describing the first zoom preset value and the second zoom preset value in the present embodiment it should be appreciated that
It is only to be exemplary rather than limitation, other any suitable number of zoom preset values are also applied for the present invention.
According to a further embodiment of the invention, processor 310 can be adopted according to target object in camera lens in the following manner
The size of occupied ratio adjustment zoom initial signal in the image of collection: with target object in the image that camera lens acquires institute
Gap between the ratio occupied and preset ratio range reduces and reduces zoom initial signal, or as target object is in mirror
Gap in the image of head acquisition between occupied ratio and preset ratio range reduces and increases zoom initial signal.
Different from a upper embodiment, the present embodiment is by the way of continuously adjustment zoom initial signal.In zooming procedure,
As the gap between target object proportion and preset ratio range is gradually reduced, it can accordingly reduce (or increase) zoom
The reduction (or increase) of initial signal, this zoom initial signal can be continuous variation.Illustratively, in the adjustable letter of zoom
It number is positively correlated in the case where (i.e. zoom adjustable signal reduces with the reduction of zoom initial signal) with zoom initial signal, place
Managing device 310 can be with gap of the target object between ratio and preset ratio range occupied in the image that camera lens acquires
Reduce and reduces zoom initial signal.Zoom adjustable signal and zoom initial signal it is negatively correlated (i.e. zoom adjustable signal with
The reduction of zoom initial signal and increase) in the case where, processor 310 can be as target object be in the image that camera lens acquires
Gap between occupied ratio and preset ratio range reduces and increases zoom initial signal.It will be appreciated, of course, that with
The progress of zoom, the gap between target object proportion and preset ratio range should be gradually reduced, if gap
Increase, illustrate that the operating rotation direction of zoom motor is anti-, in this case, can use the driving of zoom drive circuit 330 and become
Burnt motor rotates backward.
Gap between target object proportion and preset ratio range reduces, and illustrates that target object proportion is more next
Zoom initial signal can be adjusted so as to smaller and smaller (or increasing), made in this case closer to required ratio
It obtains zoom motor and the more turns the more slow.This mode can reduce the pictaresque time of target object, reduce motor since inertia rotates more
One section of bring error, improves the fineness of zoom.
According to an embodiment of the present invention, processor 310 can be further used for stop output zoom initial signal with
After stopping driving zoom motor operating, following steps are executed until detecting that target object is shared in the image that camera lens acquires
According to ratio be within the scope of preset ratio until: detection target object in the image that camera lens acquire occupied by ratio, such as
Fruit target object ratio occupied in the image that camera lens acquires is in outside preset ratio range, then re-executes zoom behaviour
Make.
As described above, motor rotation is due to inertia, can continue to walk after driving circuit shutdown it is a bit of, to cause light
Learn error.Therefore, after stopping driving zoom motor operating, zoom motor still may continue to operate it is a bit of, therefore can
Target object proportion can be caused to exceed preset ratio range again, i.e., no longer met the requirements.In such a case, it is possible to
After stopping driving zoom motor operating, target object proportion is detected again, if target object institute accounting at this time
Example is still within the scope of preset ratio, is illustrated that it still meets requirement, can be terminated the zooming procedure of camera lens, otherwise can weigh
Newly start to execute above-mentioned zoom operation, that is, restarts the zoom initial signal, the monitoring objective object institute that export initial size
Accounting example, the size that zoom initial signal is adjusted according to target object proportion and when target object proportion is in pre-
If stopping output zoom initial signal when in proportional region.It detects target object proportion and re-executes above-mentioned a series of
The step of zoom operation, can repeat, until final goal object proportion is within the scope of preset ratio.It answers
When understanding, during repeating zoom operation, the zoom initial signal that zoom operation is exported is executed every time
Initial size can be variation, can according to the actual situation depending on.For example, when first time executing zoom operation at the beginning of zoom
Beginning signal can be larger, although stopping that zoom motor after zoom motor is driven to operate one section, it usually will not be with. more
Target focal length is too wide in the gap, therefore can export more a little bit smaller zoom initial signal when executing zoom operation second, with
Zoom operation afterwards is similar.Therefore, during repeating zoom operation, the zoom that zoom operation is exported is executed every time
The initial size of initial signal can be different.In one example, the zoom initial signal that zoom operation is exported is executed every time
Initial size can according to the gap between current goal object proportion and preset ratio range determine.Additionally, it should
Understand, since zoom motor is to have operated one section due to inertia when executing zoom operation every time, is held in next time more
Usually require to make zoom motor antiport when row zoom operation, this can by set zoom drive circuit enable signal come
It realizes.
According to an embodiment of the present invention, the circuit for controlling motor includes an adjustable signal output circuit 320, this can
Adjusting signal output apparatus 320 is focus signal output circuit, and initial signal is to focus initial signal, and adjustable signal is that focusing is adjustable
Signal, a driving circuit 330 are focus drive circuits, and camera lens motor is focus motor, and it is the poly- of camera lens that optics, which adjusts situation,
Coke-like condition.
As described above, an adjustable signal circuit is correspondingly connected with a driving circuit, may be constructed a motor
Control circuit can be used for controlling zoom or the focusing of camera lens.In the case where camera lens motor is focus motor, corresponding drive
Dynamic circuit 330 is focus drive circuit, and corresponding adjustable signal output circuit 320 is focus signal output circuit.In this feelings
Under condition, processor 310 is exported to focus signal output circuit 320 focuses initial signal, in focus signal output circuit 320
DC-DC circuit 322 receives the focusing initial signal, and the focusing initial signal is converted to focusing adjustable signal.Focus signal
Output circuit 322 is exported adjustable signal is focused to focus drive circuit 330,330 collectiong focusing of focus drive circuit is adjustable letter
Number, focus drive signal is generated using adjustable signal is focused, and focus drive signal is exported to focus motor to drive and focus
Motor operating.
Processor 310 can adjust being sized such that for focusing initial signal according to exposing condition and focus the big of adjustable signal
It is small to change with the variation of exposing condition.It focuses adjustable signal to be converted by DC-DC circuit 322, focuses adjustable signal
Depending on focusing initial signal, it can change with the variation for focusing initial signal.Focus drive signal is by focusing driving electricity
Road 330 (such as H-bridge drive circuit) using focus adjustable signal generate, therefore, focus drive signal again can with focusing can
It adjusts the variation of signal and changes.Therefore, via focus signal output circuit 320 and focus drive circuit 330, processor 310 can
To control the size of focus drive signal by focusing initial signal, and then control the operating of focus motor.
According to an embodiment of the present invention, above-mentioned exposing condition is corresponding with the clarity for the image that camera lens acquires, processing
Device 310 is further used for executing focusing operation, and focusing operation includes: to export the focusing initial signal of initial size to start to drive
Focus motor operating, the clarity of the image of monitoring camera acquisition focus just according to the clarity adjustment of the image of camera lens acquisition
The size of beginning signal, and when the clarity of the image of camera lens acquisition is greater than or equal to clarity threshold, stop output and focuses
Initial signal is to stop driving focus motor operating.
By the clarity for focusing the image of adjustable camera lens acquisition.After by aforementioned zooming procedure, Ke Yi great
Cause to obtain magnification level meet the requirements but clarity not necessarily suitable image.Then by focus can further obtain compared with
For the image of clarity.Therefore, zooming procedure can be considered as to the coarse tuning process of camera lens, focusing is considered as to the fine tuning of camera lens
Process.For focusing, the higher the better for the clarity of the image of camera lens acquisition, therefore can preset a clarity threshold
The index whether value meets the requirements as the clarity of image.Clarity threshold can be any suitable value, can basis
Depending on needing, the present invention limits not to this.
The clarity of the image of camera lens acquisition can be determined using conventional Measurement for Digital Image Definition, not right herein
This is repeated.
When being focused operation, processor 310 can export the focusing initial signal of initial size first to start to drive
Dynamic focus motor operating.The size of focusing initial signal exported when just starting and focusing can according to circumstances depending on.Example
Property, focusing initial signal can be fixed value, i.e., starts to focus every time all using an equal amount of focusing initial signal.Example
Property, focusing initial signal is also possible to revocable value, such as it can be according to the image of camera lens acquisition when starting to focus
Clarity determines.For example, if start focus when, camera lens acquisition image clarity and clarity threshold between difference
Away from smaller, then lesser focusing initial signal can be exported to operate with driving focus motor relatively slower;, whereas if starting
When focusing, the gap between the clarity and clarity threshold of the image of camera lens acquisition is larger, then can export biggish focusing
Initial signal is to drive focus motor more quickly to operate.
In focusing, the clarity of the image of camera lens acquisition can be monitored in real time.The real time monitoring may include
It continuously monitors or is monitored at a time interval.It is monitoring simultaneously, it can be according to the clear of the image that camera lens acquires
Degree adjustment in real time focuses the size of initial signal.The mode that adjustment focuses initial signal can be continuous adjustment or stepping position tune
It is whole, it is introduced below in conjunction with specific embodiment, this will not be repeated here.
With the progress of focusing, the clarity of the image of camera lens acquisition can become closer to clarity threshold.When
When the clarity of the image of camera lens acquisition is greater than or equal to clarity threshold, it is believed that the clarity satisfaction of the image of camera lens acquisition is wanted
It asks, output can be stopped at this time and focus initial signal, to stop driving focus motor operating.Stop output and focuses initial signal
It can be understood as the signal that output size is zero.
By the above-mentioned means, processor 310 can adjust the running speed of focus motor in real time in focusing, such as
Focus motor operating can be kept very fast focusing the incipient stage, keep focus motor operating slower focusing finishing phase.It is this with
Exposing condition adjustment focus motor driving condition mode can accelerate focus process, can reduce due to motor inertia
Bring optical parallax.
According to an embodiment of the present invention, processor 310 can be in the following manner according to the clear of the image of camera lens acquisition
Clear degree adjustment focuses the size of initial signal: when the gap between the clarity and clarity threshold of the image of camera lens acquisition is greater than
When default focusing gap, the size for focusing initial signal is set as the first focusing preset value, and when the image of camera lens acquisition
Clarity and clarity threshold between gap be less than or equal to default when focusing gap, the size for focusing initial signal is set
It is set to the second focusing preset value.
Illustratively, the gap between the clarity and clarity threshold of the image of camera lens acquisition can be in the following manner
Determine: the clarity of image that the clarity of image of camera lens acquisition is acquired with the difference of clarity threshold or camera lens is opposite clear
Gap between the clarity and clarity threshold of the image that the percentage of clear degree threshold value is considered as camera lens acquisition.Above-mentioned determining camera lens
The mode of gap between the clarity and clarity threshold of the image of acquisition is only exemplary rather than limitation, the present invention is not limited to
This.
The default gap that focuses can be any suitable value, and depending on can according to need, the present invention is not limited it
System.Assuming that the gap between the clarity and clarity threshold of the image that current camera lens acquires is greater than default focusing gap, then
The size for focusing initial signal can be set as to the first focusing preset value at this time.As focus motor operates, camera lens acquisition
The clarity of image is higher and higher, becomes closer to clarity threshold, when its gap between clarity threshold is less than or waits
When default focusing gap, the size for focusing initial signal can be set as to the second focusing preset value.First focuses preset value
It is different that preset value is focused with second.The size of first focusing preset value and the second focusing preset value can be set as needed, this
Invention is limited not to this.Illustratively, it is positively correlated in focusing adjustable signal and focusing initial signal and (focuses adjustable letter
Number with focus initial signal reduction and reduce) in the case where, first focus preset value can be greater than second focus preset value.?
It focuses adjustable signal and focusing initial signal is negatively correlated (i.e. focusing adjustable signal increases with the reduction for focusing initial signal)
In the case where, first focuses preset value can focus preset value less than second.
This mode may be considered a kind of stepping adjustment mode, and the size for focusing initial signal is divided into multiple shelves, pass through
Each grade of threshold value is set, and the degree of clarity close to the clarity threshold of the image that can be acquired with camera lens gradually adjusts poly-
The size of burnt initial signal.
Although describing the first focusing preset value and second in the present embodiment focuses preset value it should be appreciated that
It is only to be exemplary rather than limitation, other any suitable number of focusing preset values are also applied for the present invention.
According to a further embodiment of the invention, processor 310 can be in the following manner according to the image of camera lens acquisition
Clarity adjustment focuses the size of initial signal: with the gap between the clarity and clarity threshold of the image of camera lens acquisition
Reduce and reduce and focus initial signal, or as the gap between the clarity and clarity threshold of the image of camera lens acquisition subtracts
It is small and increase focus initial signal.
Different from a upper embodiment, the present embodiment is focused using continuous adjustment by the way of initial signal.In focusing,
As the gap between the clarity and clarity threshold of the image of camera lens acquisition is gradually reduced, it can accordingly reduce (or increase)
Initial signal is focused, this reduction (or increase) for focusing initial signal can be continuous variation.Illustratively, focus can
It adjusts signal and focuses the case where initial signal is positively correlated and (focuses adjustable signal to reduce with the reduction for focusing initial signal)
Under, processor 310 can reduce with the gap between the clarity and clarity threshold of the image that camera lens acquires and reduce poly-
Burnt initial signal.Focus adjustable signal and focus initial signal it is negatively correlated (i.e. focusing adjustable signal with focus initial signal
Reduction and increase) in the case where, processor 310 can with camera lens acquire image clarity and clarity threshold between
Gap reduce and increase focus initial signal.It will be appreciated, of course, that with the progress of focusing, the image of camera lens acquisition it is clear
Gap between clear degree and clarity threshold should be gradually reduced, if gap increases, illustrate that the operating of focus motor turns
Dynamic direction is anti-, in this case, can use focus drive circuit 330 and focus motor is driven to rotate backward.
Gap between the clarity and clarity threshold of the image of camera lens acquisition reduces, and illustrates the image of camera lens acquisition
Clarity becomes closer to required clarity, in this case, can will focus initial signal be adjusted so as to it is smaller and smaller (or
It is increasing) so that focus motor the more turns the more slow.This mode can reduce motor since inertia rotates one more with focal time
Section bring error, improves the fineness of focusing.
According to an embodiment of the present invention, processor 310 can be further used for stop export focus initial signal with
After stopping driving focus motor operating, following steps are executed until detecting that the clarity of the image of camera lens acquisition is greater than or waits
Until clarity threshold: the clarity of the image of detector lens acquisition, if the clarity of the image of camera lens acquisition is less than clearly
Clear degree threshold value, then re-execute focusing operation.
Similarly with zooming procedure, after stopping driving focus motor operating, focus motor still may continue to operate
It is a bit of, it is thus possible to which that again less than clarity threshold, image thickens the clarity for the image for causing camera lens to acquire again.
In such a case, it is possible to detect the clear of the image of camera lens acquisition again after stopping driving focus motor operating
Degree illustrates that it still meets requirement if the clarity of the image of camera lens acquisition at this time is still greater than or is equal to clarity threshold,
It can terminate the focusing of camera lens, otherwise can restart to execute above-mentioned focusing operation, that is, it is initial to restart output
Focusing initial signal, the clarity of the image of monitoring camera acquisition, the clarity of the image acquired according to camera lens of size adjust
It focuses the size of initial signal and stops output when the clarity of the image of camera lens acquisition is greater than or equal to clarity threshold
Focus initial signal.The clarity of the image of detector lens acquisition and the step of re-executing a series of above-mentioned focusing operations, can
To repeat, until the clarity of the image of final camera lens acquisition is greater than or equal to clarity threshold.It should be understood that
It is during repeating focusing operation, to execute the initial size for the focusing initial signal that focusing operation is exported every time
Can be variation, can according to the actual situation depending on.It can for example, focusing initial signal when first time executing focusing operation
With larger, although stopping that focus motor after focus motor is driven to operate one section, it usually will not be clear with target. more
It spends too wide in the gap, therefore more a little bit smaller focusing initial signal can be exported when second executes focusing operation, subsequent is poly-
Coke operation is similar.Therefore, during repeating focusing operation, the focusing that focusing operation is exported is executed every time and is initially believed
Number initial size can be different.In one example, the initial of the focusing initial signal that focusing operation is exported is executed every time
Size can be determined according to the gap between the clarity and clarity threshold of the image that camera lens acquires.Additionally, it should be appreciated that
It is, since focus motor is to have operated one section due to inertia more when executing focusing operation every time, to execute focusing in next time
It usually requires to make focus motor antiport when operation, this can be realized by setting the enable signal of focus drive circuit.
According to an embodiment of the present invention, multiple adjustable signal output circuits 320 may include zoom signal output circuit
With focus signal output circuit, initial signal may include zoom initial signal and focus initial signal, and adjustable signal can wrap
It includes zoom adjustable signal and focuses adjustable signal, multiple driving circuits 330 may include zoom drive circuit and focusing driving electricity
Road, camera lens motor may include zoom motor and focus motor, and the optics of camera lens adjusts the zoom shape that situation may include camera lens
The exposing condition of condition and camera lens.
As described above, an adjustable signal circuit is correspondingly connected with a driving circuit, may be constructed a motor
Control circuit can be used for controlling zoom or the focusing of camera lens.Control circuit relevant to zoom and with focus it is relevant
In control circuit, adjustable signal can be all made of to control the operating of camera lens motor.Zoom signal has been respectively described above
The principle and working method of output circuit and zoom drive circuit and focus signal output circuit and focus drive circuit, ability
Field technique personnel are understood that the implementation of the present embodiment according to foregoing description, repeat no more.
According to an embodiment of the present invention, zoom condition and target object ratio occupied in the image that camera lens acquires
Corresponding, exposing condition is corresponding with the clarity for the image that camera lens acquires, and processor 310 can be further used for executing zoom
Operation and focusing operation, zoom operation include: to export the zoom initial signal of initial size to start to drive zoom motor operating,
Monitoring objective object ratio occupied in the image that camera lens acquires, it is shared in the image that camera lens acquires according to target object
According to ratio adjustment zoom initial signal size, and when target object in the image that camera lens acquire occupied by ratio at
When within the scope of preset ratio, stop output zoom initial signal to stop driving zoom motor operating;Focusing operation include:
After stopping output zoom initial signal to stop driving zoom motor operating, the focusing initial signal of initial size is exported to open
Begin to drive focus motor operating, the clarity of the image of monitoring camera acquisition is adjusted according to the clarity of the image of camera lens acquisition
The size of initial signal is focused, and when the clarity of the image of camera lens acquisition is greater than or equal to clarity threshold, is stopped defeated
Focus initial signal out to stop driving focus motor operating.
It, can be first the case where for monitoring objective object when finding the target object trees etc. of fire behavior (such as occur)
First zoom is carried out to camera lens to be then again focused camera lens so that target object reaches desired pictaresque effect, so that comprising
The image of target object is clear enough.The zooming procedure of camera lens and the implementation of focusing have been respectively described above,
Those skilled in the art are understood that the implementation of the present embodiment according to foregoing description, repeat no more.
Illustratively, before executing focusing operation, processor 310 can be further used for initial in stopping output zoom
After signal is to stop driving zoom motor operating, following steps are executed until detecting the image that target object is acquired in camera lens
In until occupied ratio be in preset ratio within the scope of: detect target object in the image that camera lens acquires occupied by ratio
Example, if target object in the image that camera lens acquire occupied by ratio be in outside preset ratio range, re-execute change
Coke operation.The embodiment repeated about zoom operation is hereinbefore described, those skilled in the art retouch according to above-mentioned
The implementation for being understood that the present embodiment is stated, is repeated no more.
Illustratively, processor 310 can be further used for stopping exporting focusing initial signal to stop driving focusing
After motor operating, following steps are executed until detecting that the clarity of the image of camera lens acquisition is greater than or equal to clarity threshold
Until: the clarity of the image of detector lens acquisition weighs if the clarity of the image of camera lens acquisition is less than clarity threshold
It is new to execute focusing operation.The embodiment repeated about focusing operation, those skilled in the art have been respectively described above
Member is understood that the implementation of the present embodiment according to foregoing description, repeats no more.
Fig. 4 shows the circuit diagram of DC-DC circuit 322 according to an embodiment of the invention.According to the present embodiment, just
Beginning signal is pwm signal, and DC-DC circuit 322 includes DC-DC chip 410 and its peripheral circuit.
DC-DC chip 410 can be any suitable existing or DC-DC chip in the cards in future, such as
TPS563200 etc..
In Fig. 4, C1 and C2 are the shunt capacitance of the power input port (IN) of DC-DC chip 410;C3 and R1 is DC-
The driving capacitor and driving resistance of transistor inside DC chip 410;C4 is that the soft of DC-DC chip 410 opens capacitor;C5, C6 and
R2 is the calibration reference circuit of DC-DC chip 410;L1, C11, C12, C13 and C14 are the conversion electricity outside DC-DC chip 410
Road.The above device is similar to peripheral circuit device use in conventional DC-DC circuit, relevant to DC-DC chip.In routine
In DC-DC circuit, peripheral circuit device that different DC-DC chip uses may difference, but essential principle is one
Sample.This paper emphasis discusses the output voltage V for adjusting DC-DC circuit 322 in real time by pwm signalsupply(i.e. adjustable signal)
Principle, the above peripheral circuit device do not do specific discussion.
It encloses except circuit devcie except above-mentioned points, the peripheral circuit of DC-DC chip 410 can also include filter resistance R6, filter
Wave capacitor C10, the first divider resistance R4 and the second divider resistance R3.
As shown in figure 4, the first end of filter resistance R6 connects filter for receiving initial signal, the second end of filter resistance R6
The first end of wave capacitor C10, the second end ground connection of filter capacitor C10.The second partial pressure of first end connection of first divider resistance R4
The first end of resistance R3, and directly or via additional resistance (resistance R5 as shown in Figure 4) connection filter resistance R6 and filtering
The node of capacitor C10 connection, the second end ground connection of the first divider resistance R4.The second end of second divider resistance R3 can for exporting
Adjust signal, i.e. voltage Vsupply.The feedback port (FB) of DC-DC chip 410 connects the first divider resistance R4 and the second divider resistance
The node of R3 connection, the output switching terminal mouth (SW) of DC-DC chip 410 is via outputting inductance L1 the second divider resistance of connection R3's
Second end, that is to say, that adjustable signal is exported at one end that outputting inductance L1 is connect with the second divider resistance R3.
It should be appreciated that " first " and " second " as described herein are only used for the position carry out area to electrical part or electrical part
Point, it does not indicate any particular order, does not have any particular meaning yet.
Using DC-DC circuit 322 shown in Fig. 4, the pwm signal that processor exports can be converted into adjustable signal
Vsupply.The working principle of DC-DC circuit 322 is described below.
DC-DC circuit 322 is a negative feedback operational amplifier circuit in itself.The pwm signal of different duty is through filtering
It can be exported after the RC low-pass filter of wave resistance R6 and filter capacitor C10 composition different size of within the scope of 0~3.3V
DC voltage VPWM, which is added on the feedback port (FB) of DC-DC chip 410, puts by internal negative-feedback operation
Big circuit counting, and then control adjustable signal VsupplyVoltage value.Illustratively, it is believed that the duty ratio of pwm signal is corresponding
The size of pwm signal.In the present embodiment, the duty ratio of pwm signal is bigger, DC voltage VPWMAlso bigger.
That is, the voltage regulation loop of DC-DC circuit 322 is the closed loop of a negative-feedback, when loop stability, deposit
In following relationship:
Wherein, VFBIt is the voltage on the feedback port (FB) of DC-DC chip 410, Vref is the reference of DC-DC chip 410
Voltage, Vref are a fixed values.
From the working principle of above formula (1), formula (2) and DC-DC chip 410 it is found that working as VPWMWhen increase, VFB?
It will increase, however due to negative feedback, VsupplyReduce, and then VFBReduce, by adjusting repeatedly, final VFBStablize, Vsupply
Stablize;Similarly, work as VPWMWhen reduction, VFBAlso can reduce, however due to negative feedback, VsupplyReduce, and then VFBIncrease, warp
It crosses and adjusts repeatedly, final VFBStablize, VsupplyStablize.It can be seen that in the present embodiment, VPWMWith VsupplyIt is negatively correlated property
, i.e. VPWMV when increasesupplyReduce, VPWMV when reductionsupplyIncrease.In conjunction with zoom operation or focusing operation described above,
The size (reducing its duty ratio) that pwm signal can be reduced when needing zoom motor or focus motor to turn very fast, is needing
Zoom motor or focus motor is wanted to increase the size (increasing its duty ratio) of pwm signal when turning slower.
Therefore adjustable signal V may be implemented by the adjustment to pwm signalsupplyVariation.Illustratively, processor can
To adjust the size of initial signal by the duty ratio for changing initial signal, it being understood, however, that, this be only example and
Not limitation of the present invention, the present invention by other means, such as can change the amplitude of initial signal, to adjust initial letter
Number size.
It should be noted that the above method is only example, in addition to using pwm signal control adjustable signal, exists and pass through
Other methods export DC voltage VPWMAnd then control adjustable signal VsupplyThe case where, this is still applicable in for purposes of the invention.
It is exemplified below.Fig. 5 shows the circuit diagram of DC-DC circuit 322 in accordance with another embodiment of the present invention.According to this reality
Example is applied, initial signal is digital signal, and DC-DC circuit 322 includes DC-DC chip 510 and its peripheral circuit.
In Fig. 5, DC-DC chip 510 is similar with the construction of the DC-DC chip 410 in Fig. 4 and working principle, periphery electricity
The construction and work of the corresponding device in C1, C2, C3, R1, C4, C5, C6, R2, L1, C11, C12, C13 and C14 and Fig. 4 in road
It is similar to make principle, repeats no more.
It encloses except circuit devcie except above-mentioned points, the peripheral circuit of DC-DC chip 510 further includes digital-to-analogue conversion (DAC) circuit
520, the first divider resistance R4 and the second divider resistance R3.
It should be appreciated that merely illustrative rather than limitation of the present invention shown in Fig. 5, DAC circuit 520 can be in processor end reality
It is existing.
As shown in figure 5, the input terminal of DAC circuit 520 is for receiving initial signal and initial signal being converted to simulation letter
Number.The first end of first divider resistance R4 connects the first end of the second divider resistance R3, and directly or via additional resistance (as schemed
Resistance R5 shown in 5) connection DAC circuit 520 output end, the first divider resistance R4 second end ground connection, the second divider resistance
The second end of R3 is for exporting adjustable signal.The feedback port (FB) of DC-DC chip 510 connects the first divider resistance R4 and second
The output switching terminal mouth (SW) of the node of divider resistance R3 connection, DC-DC chip 510 is divided via outputting inductance L1 connection second
The second end of resistance R3.
In the present embodiment, processor can directly export the digital signal for representing a certain size, and DAC circuit 520 should
Digital signal is converted to analog signal, i.e. DC voltage VPWM.DC voltage V hereinPWMWith the PWM in embodiment illustrated in fig. 4
The DC voltage V that signal exports after RC filteringPWMUnanimously.That is, embodiment illustrated in fig. 4 and embodiment illustrated in fig. 5
Difference essentially consists in DC voltage VPWMGenerating mode or say that generative circuit is different, the circuit structure of remainder and work
Principle is similar.Therefore, according to reference Fig. 4 and the above-mentioned description for Fig. 4, it will be appreciated by those skilled in the art that Fig. 5 institute
The working principle for the DC-DC circuit 322 shown, repeats no more.
According to an embodiment of the present invention, driving circuit 220 or 330 may include H-bridge drive circuit.Below with reference to Fig. 6-
8 describe the working principle of H-bridge drive circuit.
Fig. 6 shows the circuit diagram according to an exemplary H-bridge drive circuit.Circuit is gained the name in " H-bridge drive circuit "
It is because its shape exactly likes alphabetical H.Four vertical legs of four triode composition H, and motor is exactly the whippletree in H.It needs to infuse
Meaning, Fig. 6 and subsequent Fig. 7 and Fig. 8 are only schematic diagrames rather than complete circuit diagram, and part of circuit is not drawn;H bridge
Driving circuit can include but is not limited to the circuit realized by triode, other transistors or integrated circuit also may be implemented.
As shown in fig. 6, H-bridge drive circuit may include four triodes and a motor.Operate motor, it is necessary to lead
A pair of of triode on logical diagonal line.According to the conducting situation of different triodes pair, electric current may from left to right or from right to left
Ground flows through motor, to control the steering of motor.
Rotate motor if necessary, it is necessary to make a pair of of triode ON on H-bridge drive circuit diagonal line.Fig. 7 is shown
According to the current flow diagram of an exemplary H-bridge drive circuit.As shown in fig. 7, working as triode Q1And Q4When conducting, electric current
Just from positive pole through triode Q1Motor is passed through from left to right, then passes through triode Q4Return to power cathode.In Fig. 7
Shown in current arrows, the electric current of the flow direction rotates clockwise driving motor.As triode Q1And Q4When conducting, electric current from a left side to
Motor is flowed through on the right side, so that driving motor rotates (arrow around motor is designated as clockwise) along specific direction.Fig. 8 is shown
According to the current flow diagram of another exemplary H-bridge drive circuit.Fig. 8 shows another pair triode Q2And Q3Conducting
The case where, electric current will flow through motor from right to left.As triode Q2And Q3When conducting, electric current will flow through motor from right to left, thus
Driving motor rotates (arrow around motor is expressed as counterclockwise) in another direction.
The switching frequency of H-bridge drive circuit is lower, the operation is stable, therefore realizes above-mentioned driving electricity using H-bridge drive circuit
Road 220 or 330 can make circuit for controlling motor 200 or 300 safely and efficiently work.
According to an embodiment of the present invention, H-bridge drive circuit is realized using H bridge chip.Fig. 9 shows one according to the present invention
The circuit diagram for the H-bridge drive circuit of embodiment realized using H bridge chip.
H bridge chip as described herein can be any suitable chip, for example, DRV8837, L293D, L298N,
TA7257P, SN754410 etc. are not listed one by one.H bridge chip shown in Fig. 9 is DRV8837.In Fig. 9, DCM is motor, H
Output (OUT1, OUT2) the control motor rotation of bridge driving circuit.The input voltage VM of H-bridge drive circuit is above-mentioned adjustable signal
The output voltage V of output circuit 210 or 320supply, voltage VM is to adjust voltage in real time, controls electricity by control H bridge
The rotation of machine, the final control (zoom or focus control) realized to camera lens.
According to a further embodiment of the invention, H-bridge drive circuit is realized using discrete transistor.Figure 10 is shown according to this hair
The circuit diagram of the H-bridge drive circuit realized using discrete transistor of bright one embodiment.The input voltage Vdc of Figure 10 is
The output voltage V of above-mentioned adjustable signal output circuitsupply.Although motor is not shown in Figure 10, but it is understood that,
Motor can connect at the H bridge transverse arm between A, B two o'clock.Shown in the control principle and Fig. 9 of H-bridge drive circuit shown in Fig. 10
H-bridge drive circuit control principle it is consistent.It should be understood that the above-mentioned H-bridge drive circuit with reference to described in Fig. 9 and Figure 10 is only
Example rather than limitation of the present invention, it is existing to pass through electronics member device the present invention is not limited to Fig. 9 and circuit structure shown in Fig. 10
The H-bridge drive circuit that part is voluntarily built may be suitable for the present invention.
According to a further aspect of the invention, a kind of motor control method is provided.Figure 11 is shown according to an embodiment of the present invention
Motor control method 1100 schematic flow chart.As shown in figure 11, which includes the following steps.
In step S1110, adjustable signal is exported, the size of the adjustable signal can adjust situation with the optics of camera lens
Change and changes.
In step S1120, driving signal is generated using the adjustable signal.
In step S1130, the driving signal is exported for driving corresponding camera lens motor to operate.
According to one embodiment, before the output adjustable signal, the motor control method 1100 can be further
It include: to export initial signal and be sized such that the adjustable letter according to what the optics adjusted that situation adjusts the initial signal
Number size can with the optics adjust situation variation and change;And the initial signal is converted into the adjustable letter
Number.
According to one embodiment, the initial signal is zoom initial signal, and the adjustable signal is zoom adjustable signal,
The camera lens motor is zoom motor, and the optics adjusts the zoom condition that situation is the camera lens.
According to one embodiment, the zoom condition and target object ratio occupied in the image that the camera lens acquires
Example is corresponding, and the output initial signal is simultaneously sized such that institute according to what the optics adjusted that situation adjusts the initial signal
It includes: the zoom for exporting initial size that the size for stating adjustable signal can adjust the variation of situation and change with the optics
Initial signal is to start to drive the zoom motor to operate;It is shared in the image that the camera lens acquires to monitor the target object
According to ratio;The zoom is adjusted according to target object ratio occupied in the image that the camera lens acquires initially to believe
Number size;And when target object ratio occupied in the image that the camera lens acquires is in preset ratio range
When interior, stop exporting the zoom initial signal to stop driving the zoom motor to operate.
According to one embodiment, the initial signal is to focus initial signal, and the adjustable signal is to focus adjustable signal,
The camera lens motor is focus motor, and the optics adjusts the exposing condition that situation is the camera lens.
According to one embodiment, the exposing condition is corresponding with the clarity for the image that the camera lens acquires, described defeated
Out initial signal and the big of the adjustable signal is sized such that according to what the optics adjusted that situation adjusts the initial signal
Small can change with the variation of optics adjusting situation includes: to export the focusing initial signal of initial size to start
The focus motor is driven to operate;Monitor the clarity of the image of the camera lens acquisition;According to the image of camera lens acquisition
Clarity adjusts the size for focusing initial signal;And when the clarity of the image of camera lens acquisition is greater than or equal to clearly
When clear degree threshold value, stop exporting the focusing initial signal to stop driving the focus motor to operate.
According to one embodiment, the initial signal includes zoom initial signal and focusing initial signal, the adjustable letter
Number include zoom adjustable signal and focus adjustable signal, the camera lens motor includes zoom motor and focus motor, the camera lens
Optics adjust situation include the zoom condition of the camera lens and the exposing condition of the camera lens.
According to one embodiment, the zoom condition and target object ratio occupied in the image that the camera lens acquires
Example is corresponding, and the exposing condition is corresponding with the clarity for the image that the camera lens acquires, the output initial signal and root
It can be with the light according to the size for being sized such that the adjustable signal that optics adjusting situation adjusts the initial signal
Learning the variation of adjusting situation and changing includes: to export the zoom initial signal of initial size to start to drive the zoom electricity
Machine operating;Monitor target object ratio occupied in the image that the camera lens acquires;Existed according to the target object
Occupied ratio adjusts the size of the zoom initial signal in the image of the camera lens acquisition;When the target object is in institute
When stating ratio occupied in the image of camera lens acquisition and be within the scope of preset ratio, stop the output zoom initial signal with
Stop driving the zoom motor operating;The focusing initial signal of initial size is exported to start to drive the focus motor
Operating;Monitor the clarity of the image of the camera lens acquisition;It is described poly- according to the clarity adjustment of the image of camera lens acquisition
The size of burnt initial signal;And when the clarity of the image of camera lens acquisition is greater than or equal to clarity threshold, stop
The focusing initial signal is exported to stop driving the focus motor to operate.
Having been combined Fig. 2-10 describes the construction of circuit for controlling motor according to an embodiment of the present invention, working principle above
And its advantage etc., those skilled in the art are understood that each step of motor control method 1100 in conjunction with Fig. 2-10 and description above
Rapid embodiment and its advantage, repeats no more.
Circuit for controlling motor and motor control method provided in an embodiment of the present invention, due to can be according to the optics tune of camera lens
Nodular condition changes the driving voltage of camera lens motor, that is, turning for situation adjustment camera lens motor can be adjusted according to the optics of camera lens
Speed, therefore faster motor speed can be realized in the incipient stage of optics adjustment process, in the ending rank of optics adjustment process
Duan Shixian slower motor speed, this can effectively shorten optics regulating time, improve optics degree of regulation, reduce optics and adjust
Complexity.In the focal length monitoring field such as many application fields, such as safe city, forest fire protection, before there is huge application
Scape.In these security fields, accurately discovery security threat has guarantee social stability and people life property safety in time
There is very important value, therefore circuit for controlling motor provided in an embodiment of the present invention and motor control method can produce greatly
Social benefit and economic benefit, have a vast market foreground.
Although describing example embodiment by reference to attached drawing here, it should be understood that above example embodiment are only exemplary
, and be not intended to limit the scope of the invention to this.Those of ordinary skill in the art can carry out various changes wherein
And modification, it is made without departing from the scope of the present invention and spiritual.All such changes and modifications are intended to be included in appended claims
Within required the scope of the present invention.
Those of ordinary skill in the art may be aware that list described in conjunction with the examples disclosed in the embodiments of the present disclosure
Member and algorithm steps can be realized with the combination of electronic hardware or computer software and electronic hardware.These functions are actually
It is implemented in hardware or software, the specific application and design constraint depending on technical solution.Professional technician
Each specific application can be used different methods to achieve the described function, but this realization is it is not considered that exceed
The scope of the present invention.
In several embodiments provided herein, it should be understood that disclosed device and method can pass through it
Its mode is realized.For example, apparatus embodiments described above are merely indicative, for example, the division of the unit, only
Only a kind of logical function partition, there may be another division manner in actual implementation, such as multiple units or components can be tied
Another equipment is closed or is desirably integrated into, or some features can be ignored or not executed.
In the instructions provided here, numerous specific details are set forth.It is to be appreciated, however, that implementation of the invention
Example can be practiced without these specific details.In some instances, well known method, structure is not been shown in detail
And technology, so as not to obscure the understanding of this specification.
Similarly, it should be understood that in order to simplify the present invention and help to understand one or more of the various inventive aspects,
To in the description of exemplary embodiment of the present invention, each feature of the invention be grouped together into sometimes single embodiment, figure,
Or in descriptions thereof.However, the method for the invention should not be construed to reflect an intention that i.e. claimed
The present invention claims features more more than feature expressly recited in each claim.More precisely, such as corresponding power
As sharp claim reflects, inventive point is that the spy of all features less than some disclosed single embodiment can be used
Sign is to solve corresponding technical problem.Therefore, it then follows thus claims of specific embodiment are expressly incorporated in this specific
Embodiment, wherein each, the claims themselves are regarded as separate embodiments of the invention.
It will be understood to those skilled in the art that any combination pair can be used other than mutually exclusive between feature
All features disclosed in this specification (including adjoint claim, abstract and attached drawing) and so disclosed any method
Or all process or units of equipment are combined.Unless expressly stated otherwise, this specification (is wanted including adjoint right
Ask, make a summary and attached drawing) disclosed in each feature can be replaced with an alternative feature that provides the same, equivalent, or similar purpose.
In addition, it will be appreciated by those of skill in the art that although some embodiments described herein include other embodiments
In included certain features rather than other feature, but the combination of the feature of different embodiments mean it is of the invention
Within the scope of and form different embodiments.For example, in detail in the claims, embodiment claimed it is one of any
Can in any combination mode come using.
It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and ability
Field technique personnel can be designed alternative embodiment without departing from the scope of the appended claims.In the claims,
Any reference symbol between parentheses should not be configured to limitations on claims.Word "comprising" does not exclude the presence of not
Element or step listed in the claims.Word "a" or "an" located in front of the element does not exclude the presence of multiple such
Element.The present invention can be by means of including the hardware of several different elements and being come by means of properly programmed computer real
It is existing.In the unit claims listing several devices, several in these devices can be through the same hardware branch
To embody.The use of word first, second, and third does not indicate any sequence.These words can be explained and be run after fame
Claim.
The above description is merely a specific embodiment or to the explanation of specific embodiment, protection of the invention
Range is not limited thereto, and anyone skilled in the art in the technical scope disclosed by the present invention, can be easily
Expect change or replacement, should be covered by the protection scope of the present invention.Protection scope of the present invention should be with claim
Subject to protection scope.