CN103308716B - Movement detection method and apparatus - Google Patents
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- CN103308716B CN103308716B CN201210064175.XA CN201210064175A CN103308716B CN 103308716 B CN103308716 B CN 103308716B CN 201210064175 A CN201210064175 A CN 201210064175A CN 103308716 B CN103308716 B CN 103308716B
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Abstract
The invention provides a movement detection method and a movement detection apparatus. The movement detection method comprises: a laser diode (LD) emits light based on a predetermined pulse light-emitting sequence; adjusting, according to the predetermined pulse light-emitting sequence, an adjustable optical element which is arranged on the LD so as to adjust, according to the predetermined pulse light-emitting sequence, propagation direction of the light emitted from the LD; detecting an echo sequence of the light emitted from the LD; and determining movement direction based on the detected echo sequence. Through adding of one adjustable optical element, movement detection can be realized just with one LD and one photoelectric detector, so that numbers of elements included in the movement detection apparatus are lessened and cost is reduced.
Description
Technical field
The present invention relates to mobile detection and identify, more specifically, relate to a kind of mobile detection method and device.
Summary of the invention
Have mobile detection with the electronic equipment (such as, smart mobile phone) of recognition function existing, the movement detector adopted has composition form as shown in Figure 1 or 2 usually.
As shown in Figure 1, this movement detector adopts a photodetector (PD (Photo Detector)) and three light sources (LD (Laser Diode) or LED (Light Emitted Diode)).When object (such as, staff) when from left to right moving, photodetector first detect the light that light source 1 sends echo, then detect the echo of the light that light source 3 sends, finally detect the echo of the light that light source 2 sends, the order of the echo of light that sends according to received each light source of detector, can determine the moving direction of object thus.Similarly, when object (such as, staff) when moving from right to left, photodetector first detect the light that light source 2 sends echo, then detect the echo of the light that light source 3 sends, finally detect the echo of the light that light source 1 sends, the order of the echo of light that sends according to received each light source of detector, can determine the moving direction of object thus.
As shown in Figure 2, this movement detector adopts three photodetectors (PD) and a light source (LD or LED).When object (such as, staff) when from left to right moving, photodetector 1 first detects the echo that echo, then photodetector 3 detect the echo of the light that light source sends, last photodetector 2 detects the light that light source sends of the light that light source sends, the order of the echo of light that sends according to the light source received of each photodetector, can determine the moving direction of object thus.Similarly, when object (such as, staff) when moving from right to left, photodetector 2 first detects the echo that echo, then photodetector 3 detect the echo of the light that light source sends, last photodetector 1 detects the light that light source sends of the light that light source sends, the order of the echo of light that sends according to the light source received of each photodetector, can determine the moving direction of object thus.
But components and parts used in mobile detection are fewer, and power consumption is fewer, and cost is also lower.Movement detector as depicted in figs. 1 and 2 employs 4 components and parts altogether, and their cost is higher, and power consumption is also higher.
Therefore, mobile detection method that a kind of power consumption with less components and parts is lower and device is needed.
Summary of the invention
Consider the problems referred to above and made the present invention, an object of the present invention is to provide a kind of mobile detection method and device, its direction by utilizing adjustable optical element to adjust each LED pulse in the pulsed illumination sequence that sends of light source, mobile detection can be realized when only utilizing a light source and a photodetector, thus decrease the quantity of components and parts, reduce cost.
According to an aspect of the present invention, provide a kind of mobile detection method, comprising: light source is luminous according to predetermined pulsed illumination sequence; The adjustable optical element be placed on described light source is adjusted accordingly, to adjust the direction of propagation of the light that light source sends accordingly with described predetermined pulsed illumination sequence with described predetermined pulsed illumination sequence; Detect the echo sequence of the light that described light source sends; And determine described movement according to detected echo sequence.
Preferably, in described mobile detection method, determine that described movement comprises according to detected echo sequence: for each echo in described echo sequence, determine the pulse of its correspondence in described predetermined pulsed illumination sequence; And based on the direction of propagation adjustment that described adjustable optical element carries out determined pulse, determine described movement.
Alternatively, in described mobile detection method, determine that described movement comprises according to detected echo sequence: for each echo in described echo sequence, utilize the moment this echo being detected, based on the predetermined adjustment sequence of described adjustable optical element, determine described movement.
According to a further aspect in the invention, provide a kind of movement detector, comprising: light source, it is luminous according to predetermined pulsed illumination sequence; Adjustable optical element, it is placed on described light source, and is adjusted accordingly with described predetermined pulsed illumination sequence, to adjust the direction of propagation of the light that light source sends accordingly with described predetermined pulsed illumination sequence; Photo-detector, it detects the echo sequence of the light that described light source sends; And mobile determining means, it determines described movement according to detected echo sequence.
Preferably, in described movement detector, described mobile determining means comprises: pulse determining means, and it is for each echo in described echo sequence, determines the pulse of its correspondence in described predetermined pulsed illumination sequence; And the direction of propagation and moving direction determining means, its direction of propagation adjustment carried out determined pulse based on described adjustable optical element, determines described movement.
Alternatively, in described movement detector, for each echo in described echo sequence, described mobile determining means utilizes the moment this echo being detected, based on the predetermined adjustment sequence of described adjustable optical element, determines described movement.
Preferably, in described mobile detection method and movement detector, described adjustable optical element produces at least three directions of propagation: first direction of propagation, second direction of propagation and the 3rd direction of propagation, each pulse in described predetermined pulsed illumination sequence is propagated along one of described at least three directions of propagation, wherein, described first direction of propagation, described second direction of propagation and described 3rd direction of propagation are different from each other.
Preferably, in described mobile detection method and movement detector, the direction vector of described first direction of propagation, described second direction of propagation and described 3rd direction of propagation forms three ribs of positive triangular pyramid.
Preferably, in described mobile detection method and movement detector, determine according to detected echo sequence according to the time from the sequence detection after arriving first to along first direction of propagation, the light of the 3rd direction of propagation and second direction of propagation time, determine that described movement is for from left to right to move.
Preferably, in described mobile detection method and movement detector, determine according to detected echo sequence according to the time from the sequence detection after arriving first to along second direction of propagation, the light of the 3rd direction of propagation and first direction of propagation time, determine that described movement is for move from right to left.
Preferably, in described movement detector, described adjustable optical element is variable lens, and focal length and the optical axis of this variable lens are adjustable.
Preferably, in described movement detector, described adjustable optical element is tilting mirror.
According to the embodiment of the present invention, by utilizing a light source and a photodetector to carry out moving detection, achieve the lower mobile detection method of the power consumption with less components and parts and movement detector.
Accompanying drawing explanation
Embodiments of the present invention is described in detail in conjunction with the drawings, and above and other objects of the present invention, feature and advantage will become apparent, wherein:
Fig. 1 is the schematic diagram of the first example that existing movement detector is shown;
Fig. 2 is the schematic diagram of the second example that existing movement detector is shown;
Fig. 3 A, 3B, 3C are the schematic diagram of the mobile detection principle illustrated according to the embodiment of the present invention;
Fig. 4 is the schematic diagram of the example implementation of the mobile detection principle illustrated according to the embodiment of the present invention;
Fig. 5 is the process flow diagram of the mobile detection method illustrated according to the embodiment of the present invention;
Fig. 6 is the block diagram of the movement detector illustrated according to the embodiment of the present invention;
Specific implementation
Mobile detection method according to the embodiment of the present invention and movement detector are described below with reference to accompanying drawings.Be to be understood that: the embodiments described herein is only illustrative, and should not be interpreted as limiting the scope of the invention.
First, the principle of the mobile detection according to the embodiment of the present invention is described with reference to figure 3.According in the mobile detection of the embodiment of the present invention, only utilizing a light source and a photodetector, additionally needing one again for changing the adjustable optical element of the direction of propagation of the light that light source sends.Existing movement detector with shown in Fig. 1 and Fig. 2, decreases the quantity of components and parts used.More advantageously, the existing movement detector with shown in Fig. 1, reduces the quantity of light source, correspondingly reduces total power consumption.
As shown in Figure 3, light source is luminous with impulse form, and the light that namely light source sends is pulsed light, and as shown in 1 in Fig. 3 A, 2 and 3,1 represents first pulse, and 2 represent second pulse, and 3 represent the 3rd pulse.
Send timing or the time interval of pulsed light according to light source, correspondingly adjust adjustable optical element, make to send between the timing of pulsed light and pulsed light actual propagation direction at light source to set up corresponding relation.Thus, when object moves through movement detector, can determine that object is in the position of this timing place through movement detector according to the timing of detected echo.
Show the circulation way of the pulsed light after the adjustment of adjustable optical element in figure 3b.Explanation is below based on following provisions: the direction parallel with paper is the horizontal direction of movement detector, the original pulsed light sent of the light source of movement detector is outwards propagated (namely outwards propagating with normal direction) perpendicular to paper, arranges adjustable optical element on described light source.As shown in Figure 3 B, the pulsed light after adjustable optical element have adjusted the direction of propagation is still outwards propagated but be there is certain angle relative to this normal direction.Such as, the pulsed light after adjustable optical element have adjusted the direction of propagation can be propagated along at least three different directions of propagation: first direction of propagation, second direction of propagation and the 3rd direction of propagation.
Described adjustable optical element can be variable lens, and focal length and the optical axis of this variable lens are adjustable.Alternatively, described adjustable optical element can be tilting mirror.
Suppose relative to the paper shown in Fig. 3 B (namely, surface level) arrange a flat board abreast, shown in Fig. 3 B three pulsed light is incident upon on the difference on this flat board, such as, when supposing described flat board shown in Fig. 3 C, described three pulsed lights sequentially can project in fig. 3 c 1, 2, 3 positions, first pulsed light projection 1 position in fig. 3 c of namely propagating along first direction of propagation, second pulsed light projection 2 positions in fig. 3 c of propagating along second direction of propagation, 3rd pulsed light projection 3 positions in fig. 3 c of propagating along the 3rd direction of propagation.Advantageously, the direction vector of described first direction of propagation, described second direction of propagation and described 3rd direction of propagation forms three ribs of positive triangular pyramid.
It should be noted that first pulse represented by label 1,2,3 in the first pulsed light here, the second pulsed light and the 3rd pulsed light and Fig. 3 (A), second pulse, the 3rd pulse be not identical concept.
In description here, first pulsed light is used to refer to the pulsed light that generation propagates along first direction of propagation, and it can comprise first pulse, 1, first pulse 1 and second pulse, 2, first pulse 1 and second pulse 2 and the 3rd pulse 3 or more pulse.In like manner, the second pulsed light is used to refer to the pulsed light of generation along the second direction of propagation propagation, and the 3rd pulsed light is used to refer to the pulsed light of generation along the 3rd direction of propagation propagation.
When object (such as, staff) when from left to right moving, photodetector first detects the echo of the first pulsed light being projected onto 1 position, then detects the echo of the 3rd pulsed light being projected onto 3 positions, finally detects the echo of the second pulsed light being projected onto 2 positions.Should be appreciated that, the echo of the echo of the first pulsed light that photodetector detects, the echo of the second pulsed light and the 3rd pulsed light is originally identical with it in echoing characteristics, and is only the moment difference detecting them.Therefore, cannot the echo that detects of district office be only the echo of which pulsed light on earth according to echoing characteristics.Here, need to utilize light source to send the timing of pulsed light and the corresponding relation of the first pulsed light, the second pulsed light, the 3rd pulsed light, determine that detected echo is the echo of which pulsed light on earth.Then, when determining detected echo and being the echo of which pulsed light, basis is detected the time sequencing of the pulsed light of echo thus, can determine the moving direction of object.
Suppose: first pulse and (3 × i+1) individual pulse are (wherein, i is positive integer) be adjusted to described first pulsed light, second pulse and (3 × i+2) individual pulse are (wherein, i is positive integer) be adjusted to described second pulsed light, 3rd pulse and (3 × i+1) individual pulse (wherein, i is positive integer) are adjusted to described 3rd pulsed light.In (1) of Fig. 4, schematically illustrate above-mentioned corresponding relation, wherein, utilize A to refer to the first pulsed light, utilize B to refer to the second pulsed light, utilize C to refer to the 3rd pulsed light.
When object (such as, staff) from left to right moves, such as, photodetector detects the echo of pulsed light respectively in t11, t12 and t13 moment, as shown in (a) in Fig. 4.Echoing characteristics itself only based on detected echo cannot determine that detected echo is the echo of which pulsed light on earth.But, send the timing/sequential of light pulse based on light source, can know: light source have issued first pulse in t11 timing, have issued the 3rd pulse in t12 timing, have issued the 5th pulse in t13 timing.After this, based on the mapping relations/corresponding relation of above-mentioned pulse sequence number and pulsed light, can know: first pulse corresponds to the first pulsed light A, the 3rd pulse corresponds to the 3rd pulsed light C, and the 5th pulse corresponds to the second pulsed light B.Thus, can determine that first photodetector detects the echo of the first pulsed light being projected onto 1 position, then detect the echo of the 3rd pulsed light being projected onto 3 positions, finally detect the echo of the second pulsed light being projected onto 2 positions.Correspondingly, the moving direction of object is also determined for from left to right to move.
When object (such as, staff) moves from right to left, such as, photodetector detects the echo of pulsed light respectively in t21, t22 and t23 moment, as shown in (b) in Fig. 4.As mentioned above, only cannot determine that detected echo is the echo of which pulsed light on earth based on the echoing characteristics of detected echo itself.But, send the timing/sequential of pulsed light based on light source, can know: light source have issued second pulse in t21 timing, have issued the 3rd pulse in t22 timing, have issued the 4th pulse in t23 timing.After this, based on the mapping relations/corresponding relation of above-mentioned pulse sequence number and pulsed light, can know: second pulse corresponds to the second pulsed light B, the 3rd pulse corresponds to the 3rd pulsed light C, and the 4th pulse corresponds to the first pulsed light A.Thus, can determine that first photodetector detects the echo of the second pulsed light being projected onto 2 positions, then detect the echo of the 3rd pulsed light being projected onto 3 positions, finally detect the echo of the first pulsed light being projected onto 1 position.Correspondingly, the moving direction of object is also determined for move from right to left.
Can also suppose: first pulse, second pulse, the 3rd pulse and (9 × i+1) individual pulse, (9 × i+2) individual pulse, (9 × i+3) individual pulse (wherein, i is positive integer) are adjusted to described first pulsed light; 4th pulse, the 5th pulse, the 6th pulse and (9 × i+4) individual pulse, (9 × i+5) individual pulse, (9 × i+6) individual pulse (wherein, i is positive integer) are adjusted to described second pulsed light; 7th pulse, the 8th pulse, the 9th pulse and (9 × i+7) individual pulse, (9 × i+8) individual pulse, (9 × i+9) individual pulse (wherein, i is positive integer) are adjusted to described 3rd pulsed light.In (2) of Fig. 4, schematically illustrate above-mentioned corresponding relation, wherein, utilize A to refer to the first pulsed light, utilize B to refer to the second pulsed light, utilize C to refer to the 3rd pulsed light.
When object (such as, staff) moves from right to left, such as, photodetector detects the echo of pulsed light respectively in t31, t32, t33, t34, t35 and t36 moment, as shown in (c) in Fig. 4.It should be noted that the time interval between t31, t32, t33, t34, t35 and t36 moment is not necessarily equal.Timing/the sequential of pulsed light is sent based on light source, can know: light source have issued the 4th pulse in t31 timing, the 5th pulse is have issued in t32 timing, the 7th pulse is have issued in t33 timing, the 8th pulse is have issued in t34 timing, have issued the tenth pulse in t35 timing, have issued the 11 pulse in t36 timing.After this, based on the mapping relations/corresponding relation of above-mentioned pulse sequence number and pulsed light, can know: the 4th pulse and the 5th pulse correspond to the second pulsed light B, 7th pulse and the 8th pulse correspond to the 3rd pulsed light C, and the tenth pulse and the 11 pulse correspond to the first pulsed light A.Thus, can determine that first photodetector detects the echo of the second pulsed light being projected onto 2 positions, then detect the echo of the 3rd pulsed light being projected onto 3 positions, finally detect the echo of the first pulsed light being projected onto 1 position.Correspondingly, the moving direction of object is also determined for move from right to left.
Next, the mobile detection method 500 according to the embodiment of the present invention will be described according to Fig. 5.According to the mobile detection method 500 of the embodiment of the present invention in electronic equipment (such as, smart mobile phone) to carry out moving detection.
Mobile detection method 500 according to the embodiment of the present invention starts in step S501.
In step S510, light source is luminous according to predetermined pulsed illumination sequence.Described predetermined pulsed illumination sequence can be any pulsed illumination sequence, such as, can be the pulsed illumination sequence of constant duration, can be the pulsed illumination sequence of not constant duration.The pulse length that the pulse length of pulsed illumination sequence and recurrence interval can be suitable for carrying out moving detection for any and recurrence interval.Such as, pulse length can be 50ms, and the recurrence interval can be the 100ms situation of (1) (in the such as Fig. 4); Pulse length can be 10ms, and the recurrence interval can be the 20ms situation of (2) (in the such as Fig. 4).It should be noted that pulse length above and the value of recurrence interval are only examples, limit absolutely not realization of the present invention.
In step S520, adjust with described predetermined pulsed illumination sequence the adjustable optical element be placed on described light source accordingly, to adjust the direction of propagation of the light that light source sends accordingly with described predetermined pulsed illumination sequence.
As mentioned above, in (1) and (2) of Fig. 4, schematically illustrate the corresponding relation/mapping relations of pulse sequence number and pulsed light.By arranging the regulation rule of predetermined adjustable optical element as required, adjust with described predetermined pulsed illumination sequence the adjustable optical element be placed on described light source accordingly, the optical propagation direction of each pulse in the light pulse sequence that light source sends can be adjusted as required.Simply, described predetermined pulsed illumination sequence has predetermined emitting regular light.Such as, for (1) of Fig. 4, suppose: pulse length is 30ms, the recurrence interval is 60ms, light source sends light pulse in the time interval between (60 × i) ms to (60 × i+30) ms, wherein i be more than or equal to 0 integer.In the case, can according to the predetermined emitting regular light of described predetermined pulsed illumination sequence, the regulation rule of described adjustable optical element is set, such as, in the time interval between (60 × (j × 3)) ms to (60 × (j × 3)+30) ms (wherein, j be more than or equal to 0 integer), described adjustable optical element is adjusted to primary importance, so that the optical propagation direction of 3j+1 pulse is adjusted to the first optical propagation direction, 3j+1 pulse is made to project 1 position as shown in Figure 3 C; In the time interval between (60 × (j × 3+1)) ms to (60 × (j × 3+1)+30) ms, described adjustable optical element is adjusted to the second place, so that the optical propagation direction of 3j+2 pulse is adjusted to the second optical propagation direction, 3j+2 pulse is made to project 2 positions as shown in Figure 3 C; In the time interval between (60 × (j × 3+2)) ms to (60 × (j × 3+2)+30) ms, described adjustable optical element is adjusted to the 3rd position, so that the optical propagation direction of 3j+3 pulse is adjusted to the 3rd optical propagation direction, 3j+3 pulse is made to project 3 positions as shown in Figure 3 C.In the case, in fact there is the regulation rule fixed according to the time of described adjustable optical element, in other words, exist through the first pulsed light of described adjustable optical element, the second pulsed light, the 3rd pulsed light and the corresponding relation of time.
Above-mentioned step S510 and S520 can operate independently according to light source and adjustable optical element predetermined rule separately.
Next, in step S530, detect the echo sequence of the light that described light source sends.All known photodetectors of the prior art can be utilized to carry out the detection of the echo of light.Certainly, other device that can realize photodetection function of exploitation in the future can also be utilized to carry out the detection of the echo of light.In addition, the device that can realize other type of photodetection function that is known and exploitation in the future can also be utilized to carry out the detection of the echo of light.The present invention should not be subject to the restriction of the concrete photodetection means adopted.
Then, in step S540, determine the movement of object/object according to detected echo sequence.
Timing/the sequential of light pulse can be sent (namely based on light source above as specifically described in the principle of the invention describes, the predetermined pulse light sequences of light source) and determine which pulsed light detected echo is on earth based on the mapping relations/corresponding relation (that is, the pulse of adjustable optical element adjusts corresponding relation) of pulse sequence number and pulsed light.
In the case, for each echo in described echo sequence, determine that the light source of its correspondence sends the pulse sequence number of light pulse.Such as, send the timing/sequential of light pulse based on light source, determine the pulse sequence number of the pulse that the detected light source corresponding to each echo sends.Then, (namely pulse based on described adjustable optical element adjusts corresponding relation, pulse sequence number in described adjustable optical element and the mapping relations/corresponding relation of pulsed light), for detected each echo, utilize determined pulse sequence number to determine corresponding pulsed light.Finally, described movement is determined according to the order receiving different pulsed light.Such as, according to the pulsed light that the echo order arrangement of detected echo is corresponding with corresponding echo, described movement is determined thus.
Alternative utilization is specifically described in above-mentioned principles illustrated to be sent the timing/sequential of light pulse based on light source and determines which pulsed light detected echo is on earth based on the mapping relations/corresponding relation of pulse sequence number and pulsed light, the regulation rule of described adjustable optical element (that is, the predetermined adjustment sequence of adjustable optical element) can be utilized simply to determine which pulsed light detected echo is on earth.
When photodetector detects the echo of pulsed light in t11, t12 and t13 moment respectively as Suo Shi (a) in Fig. 4, such as, directly determine that echo that the t11 moment detects is the echo of the first pulsed light, the echo that t12 detects is the echo of the 3rd pulsed light, the echo that t13 detects is the echo of the second pulsed light, and without the need to determining first, second, third pulsed light on earth corresponding to which concrete pulse that light source sends.This implementation is equally applicable to (b) in Fig. 4, no longer repeats at this.
In like manner, above-mentioned implementation is equally applicable to (2) in Fig. 4.Photodetector detects the echo of pulsed light in t31, t32, t33, t34, t35 and t36 moment respectively as Suo Shi (c) in Fig. 4, and the regulation rule of described adjustable optical element can be utilized simply to determine which pulsed light detected echo is on earth.Such as, directly determine that echo that the t31 moment detects is the echo of the second pulsed light, the echo that t32 detects is the echo of the second pulsed light, the echo that t33 detects is the echo of the 3rd pulsed light, the echo that detects of t34 moment is the echo of the 3rd pulsed light, the echo that t35 detects is the echo of the first pulsed light, the echo that t36 detects is the echo of the first pulsed light, and without the need to determining first, second, third, fourth, fifth and sixth pulsed light on earth corresponding to which concrete pulse that light source sends.
Next, with reference to figure 6, the movement detector 600 according to the embodiment of the present invention is described.Be applied in electronic equipment (such as, smart mobile phone) according to the movement detector 600 of the embodiment of the present invention to carry out moving detection.
According to the movement detector 600 of the embodiment of the present invention, by only utilizing a light source and one to produce for the adjustable optical element changing the direction of propagation of the light that light source sends the pulsed light propagated along the different direction of propagation, detect to realize pulsed light by a photodetector.Existing movement detector with shown in Fig. 1 and Fig. 2, decreases the quantity of components and parts used.
Particularly, comprise according to the movement detector 600 of the embodiment of the present invention: light source 610, adjustable optical element 620, photo-detector 630 and mobile determining means 640.
Described light source 610 is luminous according to predetermined pulsed illumination sequence.Such as can send pulsed illumination sequence as shown in the pulse in Fig. 3 A and Fig. 4.
Described adjustable optical element 620 is placed on described light source, and the light sent from described light source is outwards propagated after described adjustable optical element 620 again.Adjust described adjustable optical element 620 accordingly with described predetermined pulsed illumination sequence, thus adjust the direction of propagation of the light that light source sends accordingly with described predetermined pulsed illumination sequence.
Described adjustable optical element can be variable lens, and focal length and the optical axis of this variable lens are adjustable.Alternatively, described adjustable optical element can be tilting mirror.
Such as, as shown in (1) in Fig. 4, first pulse and (3 × i+1) individual pulse are (wherein, i is positive integer) be adjusted to the first pulsed light propagated along first direction of propagation, second pulse and (3 × i+2) individual pulse are (wherein, i is positive integer) be adjusted to the second pulsed light propagated along second direction of propagation, 3rd pulse and (3 × i+1) individual pulse (wherein, i is positive integer) are adjusted to the 3rd pulsed light propagated along the 3rd direction of propagation.
Again such as, as shown in (2) in Fig. 4, first pulse, second pulse, the 3rd pulse and (9 × i+1) individual pulse, (9 × i+2) individual pulse, (9 × i+3) individual pulse (wherein, i is positive integer) are adjusted to the first pulsed light propagated along first direction of propagation; 4th pulse, the 5th pulse, the 6th pulse and (9 × i+4) individual pulse, (9 × i+5) individual pulse, (9 × i+6) individual pulse (wherein, i is positive integer) are adjusted to the second pulsed light propagated along second direction of propagation; 7th pulse, the 8th pulse, the 9th pulse and (9 × i+7) individual pulse, (9 × i+8) individual pulse, (9 × i+9) individual pulse (wherein, i is positive integer) are adjusted to the 3rd pulsed light propagated along the 3rd direction of propagation.
Photo-detector 630 detects the echo sequence of the light that described light source sends.All known photodetectors of the prior art can be utilized to carry out the detection of the echo of light.Certainly, other device that can realize photodetection function of exploitation in the future can also be utilized to carry out the detection of the echo of light.
Mobile determining means 640 determines the movement of object/object according to detected echo sequence.
According to the first example of the embodiment of the present invention, described mobile determining means 640 can comprise: pulse determining means, and it is for each echo in described echo sequence, determines the pulse of its correspondence in described predetermined pulsed illumination sequence; And the direction of propagation and moving direction determining means, its direction of propagation adjustment carried out determined pulse based on described adjustable optical element, determines described movement.
Such as, for each echo in described echo sequence, described pulse determining means determines that the light source of its correspondence sends the pulse sequence number of light pulse.Such as, send the timing/sequential of light pulse based on light source, determine the pulse sequence number of the pulse that the detected light source corresponding to each echo sends.Then, the direction of propagation adjustment that the described direction of propagation and moving direction determining means are carried out determined pulse based on described adjustable optical element, determines described movement.Such as, (namely pulse based on described adjustable optical element adjusts corresponding relation, pulse sequence number in described adjustable optical element and the mapping relations/corresponding relation of pulsed light), for detected each echo, utilize determined pulse sequence number to determine corresponding pulsed light, and determine described movement according to the order receiving different pulsed light.
According to the second example of the embodiment of the present invention, for each echo in described echo sequence, described mobile determining means 640 can utilize the moment this echo being detected, based on the predetermined adjustment sequence of described adjustable optical element, determine the pulsed light corresponding to this echo, and determine described movement according to the order receiving different pulsed light.
In addition, movement detector according to the embodiment of the present invention can also comprise sequence control assembly, it controls described light source and carries out luminescence according to predetermined pulsed illumination sequence, and controls described adjustable optical element and adjust optical propagation direction accordingly with described predetermined pulsed illumination sequence.
In addition, the movement detector according to the embodiment of the present invention can also comprise memory unit, and it stores the pulsed illumination rule of described light source and the regulation rule of described adjustable optical element.
Alternatively, according in the movement detector of the embodiment of the present invention, light source 610 has self control assembly (can be built-in or external), and this control assembly controls the luminescence of light source 610.Similarly, described adjustable optical element 620 has himself control assembly, and this control assembly controls the operation of adjustable optical element 620.
Utilize according to mobile detection method of the present invention and movement detector, only can utilize when a light source and a photodetector and realize mobile detection, thus decrease the quantity of components and parts, reduce the size of electronic equipment, reduce cost.
Should be appreciated that and can realize mobile detection method according to the embodiment of the present invention and movement detector with the various forms of hardware, software, firmware, application specific processor or their combination.Provide description here, those of ordinary skill in the related art can expect these and similar realization or configuration of the present invention.
Although describe some embodiments of the present invention with reference to the accompanying drawings here, should be appreciated that described embodiment is only illustrative, and not restrictive.It will be appreciated by those skilled in the art that when not deviating from the scope and spirit of the present invention limited in claim and equivalent thereof, the change in various forms and details can be made these exemplary embodiments.
Claims (16)
1. a mobile detection method, comprising:
Light source is luminous according to predetermined pulsed illumination sequence;
The adjustable optical element be placed on described light source is adjusted accordingly, to adjust the direction of propagation of the light that light source sends accordingly with described predetermined pulsed illumination sequence with described predetermined pulsed illumination sequence;
Detect the echo sequence of the light that described light source sends; And
According to detecting in detected echo sequence and echo sequence that the moment of each echo determines described movement.
2. mobile detection method as claimed in claim 1, wherein, according to detecting in detected echo sequence and echo sequence that the moment of each echo determines that described movement comprises:
For each echo in described echo sequence, determine the pulse of its correspondence in described predetermined pulsed illumination sequence; And
Based on the direction of propagation adjustment that described adjustable optical element carries out determined pulse, determine described movement.
3. mobile detection method as claimed in claim 1, wherein, determine that described movement comprises according to detected echo sequence:
For each echo in described echo sequence, utilize the moment this echo being detected, based on the predetermined adjustment sequence of described adjustable optical element, determine described movement.
4. mobile detection method as claimed in claim 1, wherein, described adjustable optical element produces at least three directions of propagation: first direction of propagation, second direction of propagation and the 3rd direction of propagation, each pulse in described predetermined pulsed illumination sequence is propagated along one of described at least three directions of propagation
Wherein, described first direction of propagation, described second direction of propagation and described 3rd direction of propagation are different from each other.
5. mobile detection method as claimed in claim 4, wherein, the direction vector of described first direction of propagation, described second direction of propagation and described 3rd direction of propagation forms three ribs of positive triangular pyramid.
6. mobile detection method as claimed in claim 4, wherein, determine according to detected echo sequence according to the time from the sequence detection after arriving first to along first direction of propagation, the light of the 3rd direction of propagation and second direction of propagation time, determine that described movement is for from left to right to move.
7. mobile detection method as claimed in claim 4, wherein, determine according to detected echo sequence according to the time from the sequence detection after arriving first to along second direction of propagation, the light of the 3rd direction of propagation and first direction of propagation time, determine that described movement is for move from right to left.
8. mobile detection method as claimed in claim 1, wherein, described adjustable optical element is variable lens, and focal length and the optical axis of this variable lens are adjustable.
9. mobile detection method as claimed in claim 1, wherein, described adjustable optical element is tilting mirror.
10. a movement detector, comprising:
Light source, it is luminous according to predetermined pulsed illumination sequence;
Adjustable optical element, it is placed on described light source, and is adjusted accordingly with described predetermined pulsed illumination sequence, to adjust the direction of propagation of the light that light source sends accordingly with described predetermined pulsed illumination sequence;
Photo-detector, it detects the echo sequence of the light that described light source sends; And
Mobile determining means, it is according to detecting in detected echo sequence and echo sequence that the moment of each echo determines described movement.
11. movement detectors as claimed in claim 10, wherein, described mobile determining means comprises:
Pulse determining means, it is for each echo in described echo sequence, determines the pulse of its correspondence in described predetermined pulsed illumination sequence; And
The direction of propagation and moving direction determining means, its direction of propagation adjustment carried out determined pulse based on described adjustable optical element, determines described movement.
12. movement detectors as claimed in claim 10, wherein,
For each echo in described echo sequence, described mobile determining means utilizes the moment this echo being detected, based on the predetermined adjustment sequence of described adjustable optical element, determines described movement.
13. movement detectors as claimed in claim 10, wherein, described adjustable optical element produces at least three directions of propagation: first direction of propagation, second direction of propagation and the 3rd direction of propagation, each pulse in described predetermined pulsed illumination sequence is propagated along one of described at least three directions of propagation
Wherein, described first direction of propagation, described second direction of propagation and described 3rd direction of propagation are different from each other.
14. movement detectors as claimed in claim 13, wherein, the direction vector of described first direction of propagation, described second direction of propagation and described 3rd direction of propagation forms three ribs of positive triangular pyramid.
15. movement detectors as claimed in claim 10, wherein, described adjustable optical element is variable lens, and focal length and the optical axis of this variable lens are adjustable.
16. movement detectors as claimed in claim 10, wherein, described adjustable optical element is tilting mirror.
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|---|---|---|---|
| CN201210064175.XA CN103308716B (en) | 2012-03-12 | 2012-03-12 | Movement detection method and apparatus |
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| CN201210064175.XA CN103308716B (en) | 2012-03-12 | 2012-03-12 | Movement detection method and apparatus |
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| CN103308716A CN103308716A (en) | 2013-09-18 |
| CN103308716B true CN103308716B (en) | 2015-06-03 |
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| CN112859481B (en) * | 2021-03-04 | 2022-02-11 | 中国工程物理研究院流体物理研究所 | Light intensity time scale detector for time sequence diagnosis of rotating mirror framing camera and calibration method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5225672A (en) * | 1990-10-03 | 1993-07-06 | Spacelabs Medical, Inc. | Method and apparatus for detecting movement of an electro-optical transducer |
| CN102096464A (en) * | 2009-12-10 | 2011-06-15 | 夏普株式会社 | Optical detection device and electronic equipment |
| CN102165398A (en) * | 2008-09-26 | 2011-08-24 | Nxp股份有限公司 | System and method for detecting movement of an object and integrated circuit implementation thereof |
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2012
- 2012-03-12 CN CN201210064175.XA patent/CN103308716B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5225672A (en) * | 1990-10-03 | 1993-07-06 | Spacelabs Medical, Inc. | Method and apparatus for detecting movement of an electro-optical transducer |
| CN102165398A (en) * | 2008-09-26 | 2011-08-24 | Nxp股份有限公司 | System and method for detecting movement of an object and integrated circuit implementation thereof |
| CN102096464A (en) * | 2009-12-10 | 2011-06-15 | 夏普株式会社 | Optical detection device and electronic equipment |
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