CN109238314A - For the detection method and device close to induction - Google Patents
For the detection method and device close to induction Download PDFInfo
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- CN109238314A CN109238314A CN201810786320.2A CN201810786320A CN109238314A CN 109238314 A CN109238314 A CN 109238314A CN 201810786320 A CN201810786320 A CN 201810786320A CN 109238314 A CN109238314 A CN 109238314A
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- G—PHYSICS
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- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
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- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
- G01D5/24—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying capacitance
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Abstract
This application discloses a kind of detection method and device for close to induction.This includes: to obtain the first initial capacitance when capacitive proximity inductive pick-up is under non-triggering state, is filtered to obtain the first reference capacitance and first wave dynamic condenser to first initial capacitance；Detect whether the first wave dynamic condenser is greater than the first noise capacitor；If detecting the first wave dynamic condenser greater than the first noise capacitor, temperature difference compensation operation is carried out to first initial capacitance；Using in sensor-triggered and by the way of not triggering and respectively obtaining initial capacitance under two states, by carrying out temperature difference compensation operation to initial capacitance, achieve the purpose that reduce such environmental effects carries out state judgement again later, the technical effect of accuracy is determined to realize raising state, and then solves the problems, such as not detecting that manpower leaves after capacitive proximity inductive pick-up is chronically at triggering state.
Description
Technical field
This application involves close to induction field, in particular to a kind of detection method and device for close to induction.
Background technique
Caused capacitance variations have detected whether manpower when capacitive proximity inductive pick-up is close by induction manpower
It is close, key can be used as or close to inductive switch, instead of traditional mechanical key.When no manpower is close, electricity
Appearance formula will form a parasitic capacitance Cp close to inductive pick-up and the external world, when there is manpower close, can additionally introduce capacitor Ch,
Total capacitor is C=Cp+Ch.Parasitic capacitance Cp is highly susceptible to outside environmental elements (especially temperature) in actual use
It influences and generates variation Cp ', false triggering will be generated when Cp ' size is suitable with Ch.The electricity of the parasitism due to caused by environmental change
The variation Cp ' of appearance often relatively slowly, it is fast to be far from the capacitor Ch introduced when manpower is close variation.It uses in the related technology
It is to be filtered (average filter, median filtering, low-pass filtering or the combination between them) to it when C variation is slow and obtain
Baseline Cbase, baseline can be with parasitic capacitor variations caused by tracking environmental, when C generates big variation suddenly, C and Cbase
Poor Cdiff will be very big, think have manpower close at this time, sensor-triggered, baseline keeps the value before triggering constant.
Inventors have found that baseline no longer updates after technical solution in the related technology is due to sensor-triggered, it just can not be again
Parasitic capacitor variations caused by tracking environmental.When manpower is in the proximity state some time, sensor is constantly in triggering shape
State, parasitic capacitor variations Cp ' caused by environment may be increasing with the accumulation of time, meet or exceed Ch.Hereafter again
The poor Cdiff of release hand, C and Cbase are still very big, and sensor just can't detect leaving for hand；In actual use,
The variation of parasitic capacitance Cp caused by temperature is the most obvious, and manpower unclamps after holding sensor for a long time, caused by being easy because of temperature
Parasitic capacitor variations and be always maintained at triggering state.
Therefore, it is badly in need of a kind of detection method and device for close to induction, to solve capacitive proximity inductive pick-up
The problem of manpower leaves can not be detected after being chronically at triggering state.
Summary of the invention
The main purpose of the application is to provide a kind of detection method and device for close to induction, to solve condenser type
The problem of manpower leaves can not be detected after being chronically at triggering state close to inductive pick-up.
To achieve the goals above, according to the one aspect of the application, a kind of detection side for close induction is provided
Method.
According to the application for including: to be in not touch in capacitive proximity inductive pick-up close to the detection method of induction
The first initial capacitance is obtained when under hair-like state, and first initial capacitance is filtered to obtain the first reference capacitance and
One fluctuation capacitor, wherein the first wave dynamic condenser is the difference of first initial capacitance and first reference capacitance；Inspection
Survey whether the first wave dynamic condenser is greater than the first noise capacitor, wherein the first noise capacitor is the described first initial electricity
The ambient noise value of appearance；If detecting the first wave dynamic condenser greater than the first noise capacitor, initially to described first
Capacitor carries out temperature difference compensation operation.
Further, if the first wave dynamic condenser is greater than the first noise capacitor, at the beginning of described first
It includes: to obtain current first real time temperature by temperature measuring device that beginning capacitor, which enters temperature difference compensation operation,；According to described first
Real time temperature obtains corresponding first compensating electric capacity, wherein first compensating electric capacity is used to be used as first real time temperature
Caused capacitance variations value；According to first compensating electric capacity, capacitance compensation is carried out to first initial capacitance, obtains data
Revised first initial capacitance.
Further, whether the detection first wave dynamic condenser is greater than after the first noise capacitor further include: if
The first wave dynamic condenser is detected no more than the first noise capacitor, then detects the first wave dynamic condenser and described default the
The size relation of one triggering capacitor, wherein the default first triggering capacitor is used to be used as human body close to the capacitive proximity
Caused capacitance variations value when inductive pick-up.
Further, if described detect the first wave dynamic condenser no more than the first noise capacitor, institute is monitored
If the size relation for stating first wave dynamic condenser and the default first triggering capacitor includes: that monitor the first wave dynamic condenser big
In the default first triggering capacitor, then the capacitive proximity inductive pick-up is in triggering state.
Further, if described detect the first wave dynamic condenser no more than the first noise capacitor, institute is detected
State the size relation of first wave dynamic condenser and the default first triggering capacitor further include: if monitoring the first wave dynamic condenser
No more than the default first triggering capacitor, then first initial capacitance is filtered again, is obtained updated
First reference capacitance and first wave dynamic condenser.
To achieve the goals above, according to the another aspect of the application, a kind of detection dress for close to induction is provided
It sets, obtains the first initial capacitance when capacitive proximity inductive pick-up is under non-triggering state.
What it is according to the application includes: the first computing unit for the detection device close to induction, for at the beginning of described first
Beginning capacitor is filtered to obtain the first reference capacitance and first wave dynamic condenser；First monitoring unit, for monitoring described
The size relation of one fluctuation capacitor and the first noise capacitor, wherein the first noise capacitor is first initial capacitance
Noise figure；First execution unit executes default for the size relation according to the first wave dynamic condenser and the first noise capacitor
Calculating operation.
According to further aspect of the application, another detection method for close to induction is provided, is connect in condenser type
Near-induction sensor obtains the second initial capacitance when being under triggering state.
According to the application for including: to carry out temperature difference compensation to second initial capacitance close to the detection method of induction
Operation, second initial capacitance after obtaining data correction；Second initial capacitance is filtered to obtain second
Reference capacitance and the second fluctuation capacitor, wherein the second fluctuation capacitor is second initial capacitance and second benchmark
The difference of capacitor；Detect whether the second fluctuation capacitor is less than default first releasing triggering capacitor, wherein described default first
Caused capacitance variations value when releasing triggering capacitor for as human body far from the capacitive proximity inductive pick-up；If
It detects the second fluctuation capacitor and is less than default first releasing triggering capacitor, then the capacitive proximity inductive pick-up is in not
Triggering state.
Further, the detection the second fluctuation capacitor also wraps after whether being less than default first releasing triggering capacitor
Include: if the detection second fluctuation capacitor releases triggering capacitor not less than default first, the capacitive proximity induction is passed
Sensor is in triggering state.
Further, described that temperature difference compensation operation is carried out to second initial capacitance, it is described after obtaining data correction
Second initial capacitance includes: to obtain current second real time temperature by temperature measuring device；According to second real time temperature,
Obtain corresponding second compensating electric capacity, wherein second compensating electric capacity is used for as electricity caused by second real time temperature
Hold changing value；According to second compensating electric capacity, capacitance compensation is carried out to second initial capacitance, after obtaining data correction
Second initial capacitance.
To achieve the goals above, according to the another aspect of the application, a kind of detection dress for close to induction is provided
It sets, obtains the second initial capacitance when capacitive proximity inductive pick-up is under triggering state.
What it is according to the application includes: amending unit for the detection device close to induction, for the described second initial electricity
Hold and carries out temperature difference compensation operation, first initial capacitance after obtaining data correction；Second computing unit, for described the
Two initial capacitances are filtered to obtain the second reference capacitance and the second fluctuation capacitor, wherein described second, which fluctuates capacitor, is
The difference of second reference capacitance and the second fluctuation capacitor；Second monitoring unit, for monitoring the second fluctuation electricity
Hold the size relation for releasing triggering capacitor with default first, wherein described default first, which releases triggering capacitor, is used to be used as human body
Caused capacitance variations value when far from the capacitive proximity inductive pick-up；Second execution unit, for according to described the
Two fluctuation capacitors and default second release the size relation for triggering capacitor, execute default calculating operation.
In the embodiment of the present application, using not triggering in sensor-triggered and and respectively obtain initial capacitance under two states
Mode has reached reduction such environmental effects and has carried out state judgement again later by carrying out temperature difference compensation operation to initial capacitance
Purpose and then solve capacitive proximity inductive pick-up to realize the technical effect that raising state determines accuracy
The problem of manpower leaves can not be detected after being chronically at triggering state.
Detailed description of the invention
The attached drawing constituted part of this application is used to provide further understanding of the present application, so that the application's is other
Feature, objects and advantages become more apparent upon.The illustrative examples attached drawing and its explanation of the application is for explaining the application, not
Constitute the improper restriction to the application.In the accompanying drawings:
Fig. 1 is the detection method schematic diagram according to the application first embodiment；
Fig. 2 is the detection method schematic diagram according to the application second embodiment；
Fig. 3 is the detection method schematic diagram according to the application 3rd embodiment；
Fig. 4 is the detection method schematic diagram according to the application fourth embodiment；
Fig. 5 is the detection device schematic diagram according to the application first embodiment；And
Fig. 6 is the detection device schematic diagram according to the application second embodiment.
Specific embodiment
In order to make those skilled in the art more fully understand application scheme, below in conjunction in the embodiment of the present application
Attached drawing, the technical scheme in the embodiment of the application is clearly and completely described, it is clear that described embodiment is only
The embodiment of the application a part, instead of all the embodiments.Based on the embodiment in the application, ordinary skill people
Member's every other embodiment obtained without making creative work, all should belong to the model of the application protection
It encloses.
It should be noted that the description and claims of this application and term " first " in above-mentioned attached drawing, "
Two " etc. be to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should be understood that using in this way
Data be interchangeable under appropriate circumstances, so as to embodiments herein described herein.In addition, term " includes " and " tool
Have " and their any deformation, it is intended that cover it is non-exclusive include, for example, containing a series of steps or units
Process, method, system, product or equipment those of are not necessarily limited to be clearly listed step or unit, but may include without clear
Other step or units listing to Chu or intrinsic for these process, methods, product or equipment.
In this application, term " on ", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outside",
" in ", "vertical", "horizontal", " transverse direction ", the orientation or positional relationship of the instructions such as " longitudinal direction " be orientation based on the figure or
Positional relationship.These terms are not intended to limit indicated dress primarily to better describe the present invention and embodiment
Set, element or component must have particular orientation, or constructed and operated with particular orientation.
Also, above-mentioned part term is other than it can be used to indicate that orientation or positional relationship, it is also possible to for indicating it
His meaning, such as term " on " also are likely used for indicating certain relations of dependence or connection relationship in some cases.For ability
For the those of ordinary skill of domain, the concrete meaning of these terms in the present invention can be understood as the case may be.
In addition, term " installation ", " setting ", " being equipped with ", " connection ", " connected ", " socket " shall be understood in a broad sense.For example,
It may be a fixed connection, be detachably connected or monolithic construction；It can be mechanical connection, or electrical connection；It can be direct phase
It even, or indirectly connected through an intermediary, or is two connections internal between device, element or component.
For those of ordinary skills, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The application is described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
As shown in Figure 1, disclosing a kind of detection method for close to induction, this method includes the following steps, namely S101 extremely
Step S103:
Step S101 is filtered first initial capacitance to obtain the first reference capacitance and the first fluctuation electricity
Hold；
Preferably, caused capacitance variations detect whether when capacitive proximity inductive pick-up is close by induction manpower
There is manpower close, key can be used as or close to inductive switch, instead of traditional mechanical key；When no manpower is close
When, capacitive proximity inductive pick-up and the external world will form a parasitic capacitance Cp, when there is manpower close, electricity can be additionally introduced
Hold Ch, total capacitor is C=Cp+Ch, wherein C is first initial capacitance.
Preferably, the first wave dynamic condenser is the difference of first initial capacitance and first reference capacitance；Tool
Body, due to parasitic capacitance C in actual usepIt is highly susceptible to the influence of outside environmental elements (especially temperature) and generates change
Change Cp', work as Cp' size and ChFalse triggering will be generated when quite.The variation C of the parasitic capacitance due to caused by environmental changep' past
Toward comparing slowly, it is far from the capacitor C introduced when manpower is closehVariation is fast.Common practice be when C variation it is slow when, it is right
It is filtered (average filter, median filtering, low-pass filtering or the combination between them) and obtains baseline Cbase(i.e. described first
Reference capacitance), the first reference capacitance CbaseCan be with parasitic capacitor variations caused by tracking environmental, and pass through calculating public affairs
Formula: C-Cbase=Cdiff, obtain the first wave dynamic condenser Cdiff, when C generates big variation suddenly, the first fluctuation electricity
Hold CdiffWill be very big, it can be determined that manpower is close at this time, sensor-triggered, baseline keeps the value before triggering constant.
Step S102, detects whether the first wave dynamic condenser is greater than the first noise capacitor；
Preferably, the first noise capacitor is the ambient noise value of first initial capacitance；If it is not greater, then right
C carries out average filter and updates baseline Cbase, and recalculate the first wave dynamic condenser Cdiff；If it does, illustrating that capacitance exists
Bigger variation has occurred in short time, is not such environmental effects, no longer updates C at this timebase。
Step S103, if detecting the first wave dynamic condenser greater than the first noise capacitor, at the beginning of described first
Beginning capacitor carries out temperature difference compensation operation.
Preferably, after due to sensor-triggered, baseline no longer updates, and parasitic capacitance caused by tracking environmental can not just become again
Change.When manpower is in the proximity state some time, sensor is constantly in triggering state, parasitic capacitor variations caused by environment
Cp' with the time accumulation may it is increasing, meet or exceed Ch.Hereafter hand, C and C are unclamped againbasePoor CdiffStill
Very big, sensor just can't detect leaving for hand, it is therefore desirable to carry out temperature difference compensation operation to first initial capacitance, be used for
It solves the problems, such as not detecting that manpower leaves after capacitive proximity inductive pick-up is chronically at triggering state.
Specifically, the temperature difference compensation operation detects to obtain Current Temperatures T by temperature measuring device；Then temperature is calculated
Capacitance variations value C caused by changingTThe experiment has found that in the identical situation of other conditions, temperature change and capacitance variation are at just
Correlation, proportionality coefficient are measured by experiment according to the actual situation；Finally by calculation formula: C=C-CT, obtain eliminating temperature shadow
The loud newest first initial capacitance C, and newest described first is calculated again according to first initial capacitance
Fluctuate capacitor Cdiff, then judge CdiffWhether C is greater thanThreholdOn, if it is greater than then showing that sensor is triggered, otherwise into
Enter measurement circulation next time, wherein CThreholdOnThe i.e. described default first triggering capacitor, for being used as human body close to the capacitor
Caused capacitance variations value, takes a suitable value by actual measured results when formula is close to inductive pick-up.
It can be seen from the above description that the present invention realizes following technical effect:
In the embodiment of the present application, using not triggering in sensor-triggered and and respectively obtain initial capacitance under two states
Mode has reached reduction such environmental effects and has carried out state judgement again later by carrying out temperature difference compensation operation to initial capacitance
Purpose and then solve capacitive proximity inductive pick-up to realize the technical effect that raising state determines accuracy
The problem of manpower leaves can not be detected after being chronically at triggering state.
According to the embodiment of the present application, as preferred in the present embodiment, if as shown in Fig. 2, first fluctuation
Capacitor is greater than the first noise capacitor, then enters temperature difference compensation operation to first initial capacitance and include the following steps, namely
S201 to step S203:
Step S201 obtains current first real time temperature by temperature measuring device；
Preferably, the temperature difference compensation operation detects to obtain Current Temperatures T (i.e. described first reality by temperature measuring device
Shi Wendu).
Step S202 obtains corresponding first compensating electric capacity according to first real time temperature；
Preferably, first compensating electric capacity is used for as capacitance variations value caused by first real time temperature, specifically
, calculate capacitance variations value C caused by temperature changeTI.e. described first compensating electric capacity the experiment has found that the identical feelings of other conditions
Under condition, temperature change is positively correlated with capacitance variation, and proportionality coefficient is measured by experiment according to the actual situation.
Step S203 carries out capacitance compensation to first initial capacitance, obtains data according to first compensating electric capacity
Revised first initial capacitance.
Preferably, pass through calculation formula: C=C-CT, obtain the newest described first initial electricity for eliminating temperature influence
Hold C, and the newest first wave dynamic condenser C is calculated according to first initial capacitance againdiff。
According to the embodiment of the present application, as preferred in the present embodiment, whether the detection first wave dynamic condenser is big
After the first noise capacitor further include: if detecting the first wave dynamic condenser no more than the first noise capacitor, examine
Survey the size relation of the first wave dynamic condenser and the default first triggering capacitor, wherein the default first triggering capacitor
Caused capacitance variations value when for as human body close to the capacitive proximity inductive pick-up.
Preferably, judge CdiffWhether C is greater thanThreholdOn, if it is greater than then showing that sensor is triggered, otherwise enter
Measurement circulation next time, wherein CThreholdOnThe i.e. described default first triggering capacitor, for being used as human body close to the condenser type
Caused capacitance variations value, takes a suitable value by actual measured results when close to inductive pick-up.
According to the embodiment of the present application, as preferred in the present embodiment, if described detect the first wave dynamic condenser not
Greater than the first noise capacitor, then the size relation packet of the first wave dynamic condenser and the default first triggering capacitor is monitored
It includes: if monitoring the first wave dynamic condenser is greater than the default first triggering capacitor, the capacitive proximity induction sensing
Device is in triggering state.
Preferably, judge CdiffWhether C is greater thanThreholdOn, if it is greater than then showing have manpower close, the condenser type is connect
Near-induction sensor has been triggered.
According to the embodiment of the present application, as preferred in the present embodiment, if described detect the first wave dynamic condenser not
Greater than the first noise capacitor, then detects the first wave dynamic condenser and described default first and trigger the size relation of capacitor also
It is initial to described first again if including: to monitor the first wave dynamic condenser no more than the default first triggering capacitor
Capacitor is filtered, and obtains updated first reference capacitance and first wave dynamic condenser.
Preferably, judge CdiffWhether C is greater thanThreholdOn, if it is not greater, then illustrating that no manpower is close, algorithm is automatic
Into measurement circulation next time.
It should be noted that step shown in the flowchart of the accompanying drawings can be in such as a group of computer-executable instructions
It is executed in computer system, although also, logical order is shown in flow charts, and it in some cases, can be with not
The sequence being same as herein executes shown or described step.
According to embodiments of the present invention, additionally provide it is a kind of for implementing the device of above-mentioned detection method, as shown in Fig. 5, should
Device includes: the first computing unit 10, for first initial capacitance be filtered to obtain the first reference capacitance and
First wave dynamic condenser；First monitoring unit 20, for monitoring the size relation of the first wave dynamic condenser and the first noise capacitor,
Wherein, the first noise capacitor is the noise figure of first initial capacitance；First execution unit 30, for according to described the
The size relation of one fluctuation capacitor and the first noise capacitor, executes default calculating operation.
The first computing unit 10 according to the present embodiment is for being filtered first initial capacitance
To the first reference capacitance and first wave dynamic condenser, it is preferred that capacitive proximity inductive pick-up draws when close by induction manpower
Capacitance variations detected whether that manpower is close, key can be used as or close to inductive switch, instead of traditional
Mechanical key；When no manpower is close, capacitive proximity inductive pick-up and the external world will form a parasitic capacitance Cp, work as someone
When hand is close, capacitor C can be additionally introducedh, total capacitor is C=Cp+Ch, wherein C is first initial capacitance.
The first monitoring unit 20 according to the present embodiment is for monitoring the first wave dynamic condenser and the first noise electricity
The size relation of appearance, it is preferred that the first noise capacitor is the ambient noise value of first initial capacitance；If less
In then to C progress average filter update baseline Cbase, and recalculate the first wave dynamic condenser Cdiff；If it does, explanation
Bigger variation has occurred in capacitance in a short time, is not such environmental effects, no longer updates C at this timebase。
The first execution unit 30 according to the present embodiment is used for according to the first wave dynamic condenser and the first noise electricity
The size relation of appearance executes default calculating operation, it is preferred that after sensor-triggered, baseline no longer updates, just can not again with
Parasitic capacitor variations caused by track environment.When manpower is in the proximity state some time, sensor is constantly in triggering state,
Parasitic capacitor variations C caused by environmentp' with the time accumulation may it is increasing, meet or exceed Ch.Hereafter it unclamps again
Hand, C and CbasePoor CdiffStill very big, sensor just can't detect leaving for hand, it is therefore desirable to first initial capacitance
Temperature difference compensation operation is carried out, can not detect manpower after capacitive proximity inductive pick-up is chronically at triggering state for solving
The problem of leaving.
As shown in figure 3, disclosing another detection method for close to induction, this method includes the following steps, namely S301
To step S304:
Step S301 carries out temperature difference compensation operation to second initial capacitance, and described second after obtaining data correction
Initial capacitance；
Preferably, the temperature difference compensation operation detects to obtain Current Temperatures T by temperature measuring device；Then temperature is calculated
Capacitance variations value C caused by changingTThe experiment has found that in the identical situation of other conditions, temperature change and capacitance variation are at just
Correlation, proportionality coefficient are measured by experiment according to the actual situation.
Step S302 is filtered second initial capacitance to obtain the second reference capacitance and the second fluctuation electricity
Hold；
Preferably, the second fluctuation capacitor is the difference of second initial capacitance and second reference capacitance；Tool
Body, pass through calculation formula: C=C-CT, obtain eliminating the newest second initial capacitance C of temperature influence, and according to
The newest second fluctuation capacitor C is calculated in second initial capacitance againdiff。
Step S303, detects whether the second fluctuation capacitor is less than default first releasing triggering capacitor, wherein described pre-
If the first capacitance variations caused when releasing triggering capacitor for as human body far from the capacitive proximity inductive pick-up
Value；
Preferably, judge CdiffWhether C is less thanThreholdOff(i.e. described first releases triggering capacitor), if it is less than then table
Bright sensor enters non-toggle state, otherwise enters measurement circulation next time, wherein CThreholdOffOne is taken by actual measured results
A suitable value, value ratio CThreholdOnIt is small.
Step S304, if detection the second fluctuation capacitor is less than default first and releases triggering capacitor, the capacitor
Formula is in non-triggering state close to inductive pick-up.
Preferably, if CdiffLess than CThreholdOff(i.e. it is described first release triggering capacitor), then show manpower from
It opens, the capacitive proximity inductive pick-up enters non-toggle state.
According to the embodiment of the present application, as preferred in the present embodiment, whether detection the second fluctuation capacitor is small
After default first releases and triggers capacitor further include: if the detection second fluctuation capacitor is not less than default first releasing touching
Power generation is held, then the capacitive proximity inductive pick-up is in triggering state.
Preferably, if CdiffNot less than CThreholdOff(i.e. described first releases triggering capacitor), then show manpower also not
It leaves, the capacitive proximity inductive pick-up enters triggering state.
According to the embodiment of the present application, as preferred in the present embodiment, as shown in figure 4, described to the described second initial electricity
Hold and carry out temperature difference compensation operation, second initial capacitance after obtaining data correction includes the following steps, namely S401 to step
S403:
Step S401 obtains current second real time temperature by temperature measuring device；
Preferably, the temperature difference compensation operation detects to obtain Current Temperatures T (i.e. described second reality by temperature measuring device
Shi Wendu).
Step S402 obtains corresponding second compensating electric capacity according to second real time temperature；
Preferably, second compensating electric capacity is used for as capacitance variations value caused by second real time temperature, specifically
, calculate capacitance variations value C caused by temperature changeTI.e. described second compensating electric capacity the experiment has found that the identical feelings of other conditions
Under condition, temperature change is positively correlated with capacitance variation, and proportionality coefficient is measured by experiment according to the actual situation.
Step S403 carries out capacitance compensation to second initial capacitance, obtains data according to second compensating electric capacity
Revised second initial capacitance.
Preferably, pass through calculation formula: C=C-CT, obtain the newest described second initial electricity for eliminating temperature influence
Hold C, and the newest second fluctuation capacitor C is calculated according to second initial capacitance againdiff。
According to embodiments of the present invention, additionally provide it is a kind of for implementing the device of above-mentioned detection method, as shown in Fig. 6, should
Device includes: amending unit 40, for carrying out temperature difference compensation operation to second initial capacitance, the institute after obtaining data correction
State the first initial capacitance；Second computing unit 50, for being filtered to obtain the second benchmark to second initial capacitance
Capacitor and the second fluctuation capacitor, wherein the second fluctuation capacitor is second reference capacitance and the second fluctuation capacitor
Difference；Second monitoring unit 60, the size for monitoring the second fluctuation capacitor and default first releasing triggering capacitor are closed
System, wherein described default first, which releases triggering capacitor, is used for as human body far from the capacitive proximity inductive pick-up when institute
Caused capacitance variations value；Second execution unit 70, for releasing triggering electricity according to the second fluctuation capacitor and default second
The size relation of appearance executes default calculating operation.
The amending unit 40 according to the present embodiment is used to carry out temperature difference compensation operation to second initial capacitance, obtains
First initial capacitance after to data correction, it is preferred that the temperature difference compensation operation is detected by temperature measuring device
To Current Temperatures T；Then capacitance variations value C caused by temperature change is calculatedTThe experiment has found that in the identical situation of other conditions,
Temperature change is positively correlated with capacitance variation, and proportionality coefficient is measured by experiment according to the actual situation.
The second computing unit 50 according to the present embodiment is for being filtered second initial capacitance
To the second reference capacitance and second fluctuation capacitor, it is preferred that it is described second fluctuation capacitor be second initial capacitance with it is described
The difference of second reference capacitance；Specifically, passing through calculation formula: C=C-CT, obtain eliminating the newest described of temperature influence
Second initial capacitance C, and the newest second fluctuation capacitor C is calculated according to second initial capacitance againdiff。
The second monitoring unit 60 according to the present embodiment is for monitoring the second fluctuation capacitor and default first solution
Except the size relation of triggering capacitor, it is preferred that judge CdiffWhether C is less thanThreholdOff(i.e. described first releases triggering capacitor),
If it is less than sensor is then shown into non-toggle state, otherwise enters measurement next time and recycle, wherein CThreholdOffBy reality
Measurement result takes a suitable value, value ratio CThreholdOnIt is small.
The second execution unit 70 according to the present embodiment is used for according to the second fluctuation capacitor and default second solution
Except the size relation of triggering capacitor, default calculating operation is executed, it is preferred that if CdiffLess than CThreholdOff(i.e. described first
Release triggering capacitor), then show that manpower has been moved off, the capacitive proximity inductive pick-up enters non-toggle state.
Obviously, those skilled in the art should be understood that each module of the above invention or each step can be with general
Computing device realize that they can be concentrated on a single computing device, or be distributed in multiple computing devices and formed
Network on, optionally, they can be realized with the program code that computing device can perform, it is thus possible to which they are stored
Be performed by computing device in the storage device, perhaps they are fabricated to each integrated circuit modules or by they
In multiple modules or step be fabricated to single integrated circuit module to realize.In this way, the present invention is not limited to any specific
Hardware and software combines.
The foregoing is merely preferred embodiment of the present application, are not intended to limit this application, for the skill of this field
For art personnel, various changes and changes are possible in this application.Within the spirit and principles of this application, made any to repair
Change, equivalent replacement, improvement etc., should be included within the scope of protection of this application.
Claims (10)
1. a kind of detection method for close to induction, obtains when capacitive proximity inductive pick-up is under non-triggering state
First initial capacitance, which is characterized in that this method comprises:
First initial capacitance is filtered to obtain the first reference capacitance and first wave dynamic condenser, wherein described
One fluctuation capacitor is the difference of first initial capacitance and first reference capacitance；
Detect whether the first wave dynamic condenser is greater than the first noise capacitor, wherein the first noise capacitor is described first
The ambient noise value of initial capacitance；
If detecting the first wave dynamic condenser greater than the first noise capacitor, the temperature difference is carried out to first initial capacitance
Compensating operation.
2. detection method according to claim 2, which is characterized in that if the first wave dynamic condenser is greater than described
First noise capacitor, then entering temperature difference compensation operation to first initial capacitance includes:
By temperature measuring device, current first real time temperature is obtained；
According to first real time temperature, corresponding first compensating electric capacity is obtained, wherein first compensating electric capacity is used for conduct
Capacitance variations value caused by first real time temperature；
According to first compensating electric capacity, capacitance compensation is carried out to first initial capacitance, it is described after obtaining data correction
First initial capacitance.
3. detection method according to claim 1, which is characterized in that whether the detection first wave dynamic condenser is greater than
After first noise capacitor further include:
If detecting the first wave dynamic condenser no more than the first noise capacitor, the first wave dynamic condenser and institute are detected
State the size relation of default first triggering capacitor, wherein the default first triggering capacitor is used to be used as human body close to the electricity
Caused capacitance variations value when appearance formula is close to inductive pick-up.
4. detection method according to claim 3, which is characterized in that if described, to detect the first wave dynamic condenser little
In the first noise capacitor, then the size relation packet of the first wave dynamic condenser and the default first triggering capacitor is monitored
It includes:
If monitoring the first wave dynamic condenser is greater than the default first triggering capacitor, the capacitive proximity induction sensing
Device is in triggering state.
5. detection method according to claim 3, which is characterized in that if described, to detect the first wave dynamic condenser little
In the first noise capacitor, then the size relation for detecting the first wave dynamic condenser and the default first triggering capacitor is also wrapped
It includes:
If monitoring the first wave dynamic condenser no more than the default first triggering capacitor, again to the described first initial electricity
Appearance is filtered, and obtains updated first reference capacitance and first wave dynamic condenser.
6. a kind of detection device for close to induction, which is characterized in that be in capacitive proximity inductive pick-up and do not trigger
The first initial capacitance is obtained when under state, comprising:
First computing unit obtains the first reference capacitance and the first fluctuation for being filtered to first initial capacitance
Capacitor；
First monitoring unit, for monitoring the size relation of the first wave dynamic condenser and the first noise capacitor, wherein described
One noise capacitor is the noise figure of first initial capacitance；
First execution unit executes pre-designed for the size relation according to the first wave dynamic condenser and the first noise capacitor
Calculate operation.
7. a kind of detection method for close to induction, the is obtained when capacitive proximity inductive pick-up is under triggering state
Two initial capacitances, which is characterized in that this method comprises:
Temperature difference compensation operation is carried out to second initial capacitance, second initial capacitance after obtaining data correction；
It is filtered to obtain the second reference capacitance and the second fluctuation capacitor to second initial capacitance, wherein described the
Two fluctuation capacitors are the difference of second initial capacitance and second reference capacitance；
Detect whether the second fluctuation capacitor is less than default first releasing triggering capacitor, wherein described default first releases touching
Power generation capacitance variations value caused when holding for as human body far from the capacitive proximity inductive pick-up；
Triggering capacitor, the capacitive proximity induction sensing are released if detecting the second fluctuation capacitor and being less than default first
Device is in non-triggering state.
8. detection method according to claim 7, which is characterized in that whether detection the second fluctuation capacitor is less than
After default first releasing triggering capacitor further include:
If detecting the second fluctuation capacitor releases triggering capacitor not less than default first, the capacitive proximity induction is passed
Sensor is in triggering state.
9. detection method according to claim 7, which is characterized in that described to carry out temperature difference benefit to second initial capacitance
Operation is repaid, second initial capacitance after obtaining data correction includes:
By temperature measuring device, current second real time temperature is obtained；
According to second real time temperature, corresponding second compensating electric capacity is obtained, wherein second compensating electric capacity is used for conduct
Capacitance variations value caused by second real time temperature；
According to second compensating electric capacity, capacitance compensation is carried out to second initial capacitance, it is described after obtaining data correction
Second initial capacitance.
10. a kind of detection device for close to induction, which is characterized in that be in triggering shape in capacitive proximity inductive pick-up
The second initial capacitance is obtained when under state, comprising:
Amending unit, for carrying out temperature difference compensation operation to second initial capacitance, described first after obtaining data correction
Initial capacitance；
Second computing unit obtains the second reference capacitance and the second fluctuation for being filtered to second initial capacitance
Capacitor, wherein the second fluctuation capacitor is the difference of second reference capacitance and the second fluctuation capacitor；
Second monitoring unit releases the size relation of triggering capacitor for monitoring the second fluctuation capacitor and default first,
In, described default first is caused when releasing triggering capacitor for as human body far from the capacitive proximity inductive pick-up
Capacitance variations value；
Second execution unit is held for releasing the size relation of triggering capacitor according to the second fluctuation capacitor and default second
The default calculating operation of row.
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| CN201810786320.2A CN109238314B (en) | 2018-07-17 | 2018-07-17 | Detection method and device for proximity sensing |
| PCT/CN2018/105692 WO2020015117A1 (en) | 2018-07-17 | 2018-09-14 | Proximity sensing detection method, proximity sensing detection device, sensing-type handle and baby carriage |
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| CN201810786320.2A CN109238314B (en) | 2018-07-17 | 2018-07-17 | Detection method and device for proximity sensing |
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