CN106773616A - A kind of moving object of environment resistant light interference is in the light time measurement device and method - Google Patents
A kind of moving object of environment resistant light interference is in the light time measurement device and method Download PDFInfo
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- CN106773616A CN106773616A CN201611254355.9A CN201611254355A CN106773616A CN 106773616 A CN106773616 A CN 106773616A CN 201611254355 A CN201611254355 A CN 201611254355A CN 106773616 A CN106773616 A CN 106773616A
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- G—PHYSICS
- G04—HOROLOGY
- G04F—TIME-INTERVAL MEASURING
- G04F13/00—Apparatus for measuring unknown time intervals by means not provided for in groups G04F5/00 - G04F10/00
- G04F13/02—Apparatus for measuring unknown time intervals by means not provided for in groups G04F5/00 - G04F10/00 using optical means
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- G—PHYSICS
- G04—HOROLOGY
- G04F—TIME-INTERVAL MEASURING
- G04F10/00—Apparatus for measuring unknown time intervals by electric means
- G04F10/04—Apparatus for measuring unknown time intervals by electric means by counting pulses or half-cycles of an ac
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Abstract
Moving object the present invention relates to a kind of interference of environment resistant light is in the light time measurement device, it is used to convert optical signal into electric signal including photoelectric tube, termination power is used to receive the electric signal of photoelectric tube transmission and further filter out constant ambient light interference signal to obtain the signal that is in the light, signal amplification module is used for the signal that is in the light that amplification coupling circuit sends, signal comparison module is used to receive the signal and signal that will be in the light is converted into square-wave pulse signal of being in the light of signal amplification module transmission, micro controller module is used to receive the square-wave pulse signal of signal comparison module transmission and carry out timing to square-wave pulse signal, to obtain object by the time between photoelectric tube, light path between photoelectric tube is provided with light barrier, there is parallel light slit on light barrier.It is an advantage of the invention that it is capable of being in the light the time for accurate measurement moving object, as a result accurately and reliably.
Description
Technical field
Moving object the present invention relates to a kind of interference of environment resistant light is in the light time measurement device and method, belongs to sensor
Observation and control technology field.
Background technology
The time of being in the light of photoelectric tube measurement moving object is larger by ambient light interference, causes measurement result inaccurate.In order to
The interference of ambient light is avoided, measuring the be in the light method of time of moving object by photoelectric tube at present mainly there are two kinds：The first
Be by shortening testee and transmitting tube as far as possible, the distance of reception pipe reduce the interference of ambient light, second is to pass through
Launch the light wave of specific wavelength frequency to exclude the interference of ambient light.However, the effect of both approaches is unsatisfactory, the first
Method causes moving object that the phenomenon generation for clashing into photoelectric tube is had in high-speed motion, even if moving object connects as far as possible in addition
Also can be present ambient light interference in dipped beam fulgurite, it is impossible to avoid completely；Although second method can be by launching CF
Light wave excludes the interference of ambient light, but can not accurately measure object elapsed time, especially require measurement when
Between unit very little when can there is time deviation, such as Microsecond grade other time.
The content of the invention
It is an object of the invention to：For the defect that prior art is present, a kind of moving object of environment resistant light interference is proposed
Body is in the light time measurement device, while giving its measuring method, the method certainty of measurement is high.
In order to reach object above, the moving object of environment resistant light interference of the invention is in the light time measurement device, including
Photoelectric tube, for converting optical signal into electric signal, and passes to termination power by electric signal；
Termination power, for receiving the electric signal of photoelectric tube transmission and further filtering out constant ambient light interference signal to obtain
Must be in the light signal, then give signal amplification module by the signal transmission that is in the light that filtering environmental light is disturbed；
Signal amplification module, for the signal that is in the light for receiving and amplification coupling circuit sends；
Signal comparison module, the signal and signal that will be in the light is converted into square-wave pulse of being in the light for receiving the transmission of signal amplification module
Signal；
Micro controller module, based on receiving the square-wave pulse signal of signal comparison module transmission and carrying out to square-wave pulse signal
When, to obtain object by the time between photoelectric tube；
Light path between the photoelectric tube is provided with light barrier, has on the light barrier for filtering the flat of component environment light
Row light slit.
Light path between photoelectric tube of the invention is processed into narrow parallel light path by light barrier, to reach object entrance
Sign mutation obvious purpose during light path between photoelectric tube, while reducing the input of jamming light source in ambient light, increases
Photoelectric tube measurement moving object is in the light the precision of time.In addition, the information that photoelectric tube passes through object（Optical signal）Conversion
Into ac signal（Will moving object be converted into the signal that is in the light by the time of light path）, while constant ambient light is converted
Into DC signal（That is ambient light interference signal）, and the object after conversion is more electric by the detection that information is transmitted to rear class
Road, detection comparison circuit is termination power, signal amplification module, signal comparison module.Termination power is by the stabilization of varying strength
The direct current that ambient light and stabilization launching light are converted is further filtered out, and is only allowed and is changed the signal-alternating current that is quickly in the light
Into late-class circuit, to reduce ambient light to comparing the influence of reference level, it is to avoid the comparing threshold of influence signal comparison module
Value deviation；Signal amplification module further amplifies the ac small signal through overcoupled circuits, is beneficial to signal comparison module and enters
Row judgement, accurately tells object into the moment of light waypoint, false triggering caused by preventing DC small signal from disturbing；Signal compares
The fixed threshold value of module setting（I.e. object compares threshold value into fixation during light path）, object is into reaching fixed threshold after light path
Value can just detect Fluctuation of analytical signal, and the most useful at last signal transacting that is in the light enters into square-wave pulse signal feeding micro controller module
The real-time timing treatment of row.In a word, termination power, signal amplification module, signal comparison module cooperate can eliminate by gear
The component environment light interference signal of tabula rasa so that measurement is more accurate.
Further, the photoelectric tube is made up of transmitting tube and reception pipe, between the transmitting tube and reception pipe
Light path is provided with first light barrier and the second light barrier of parallel arrangement.
Further, a slit extended along its vertical direction is respectively provided with the middle part of first, second light barrier
Or elongated hole, and the slit or elongated hole of first light barrier are located at same hanging down with the slit of the second light barrier or elongated hole
On face.So, it is parallel light path by the light path of light barrier slit or elongated hole, be processed into for optical path signal by slit or elongated hole
Parallel thin seam or tiny elongated hole, to reduce the interference volume of ambient light, improves object and enters the spirit reacted during photoelectric tube light path
Sensitivity, is finally reached that object is instantaneous, the electric purpose to light path between pipe of fully shading light.
Further, the photoelectric tube, termination power, signal amplification module, signal comparison module and microcontroller mould
Block is connected with power module.
Further, the transmitting tube is infrarede emitting diode, and one end of the infrarede emitting diode is grounded, separately
One end meets VCC by resistance one, and the reception pipe is infrared receiving diode, and one end of the infrared receiving diode is grounded,
The other end meets VCC by resistance two.
Further, the termination power includes coupled capacitor, termination infrared receiver two pole of the coupled capacitor
The output end of pipe, the input of another terminating resistor eight.
Further, the signal amplification module includes the first integrated circuit, and 4 pin of first integrated circuit connect
Ground, 7 pin meet VCC, and 3 pin connect electric capacity two and resistance six in parallel over the ground, and the output end of 2 pin connecting resistances eight, 6 pin connect the defeated of electric capacity four
Enter end, electric capacity two and resistance six in parallel connect VCC, and 2 pin, 6 pin in first integrated circuit by resistance three over the ground
Between parallel resistance nine.
Further, the signal comparison module includes the second integrated circuit, and 2 pin of second integrated circuit connect
Ground, 5 pin meet VCC, and 3 pin connect electric capacity three and resistance seven in parallel over the ground, and 4 pin connect the output end of electric capacity four, and 1 pin connects microcontroller
Module, electric capacity three and resistance seven in parallel meet VCC, 1 pin and microcontroller of second integrated circuit by resistance four over the ground
The indirect resistance five of module, the resistance five meets VCC.Wherein VCC is supply voltage.
The moving object that the present invention also provides a kind of interference of environment resistant light is in the light Method Of Time Measurement, and the method includes following
Step：
The first step, transmitting tube and reception pipe that composition photoelectric tube is installed, it is ensured that the distance between transmitting tube and reception pipe are 19
±5mm；Go to second step；
Second step, transmitting terminal the first light barrier of installation in transmitting tube, the second light barrier is installed in the receiving terminal of reception pipe, the
First, the second light barrier parallel arrangement, and ensure the distance between transmitting tube and the first light barrier for 2 ± 1mm, reception pipe and second
The distance between light barrier is 2 ± 1mm；Go to the 3rd step；
3rd step, first the output end of reception pipe is connected with termination power, then be sequentially connected termination power, signal amplification module,
Signal comparison module, micro controller module；Go to the 4th step or the 5th step；
4th step, when light path does not have object to pass through between transmitting tube and reception pipe, transmitting optical signal and ring that transmitting tube sends
Reception pipe is input into after the optical signal superposition of border, the optical signal after launching light and environment optical superposition is converted into electric signal by reception pipe,
Electric signal input coupling circuit, termination power filters the DC signal of constant ambient light signal and transmitting optical signal conversion
Remove；
5th step, when object is by light path between transmitting tube and reception pipe, tube-launched infrared light passive movement object hides
Gear, produces the optical signal of a change, the optical signal of change to be received by reception pipe after being superimposed with constant ambient light signal, reception pipe
The optical signal of change is converted into ac signal, constant ambient light signal passes to coupling electricity after being converted into DC signal
Road, termination power is filtered treatment to electric signal and obtains ac signal, and ac signal input signal amplification module is carried out
The ac signal that enhanced processing is amplified, ac signal input signal comparison module and the given reference voltage of amplification
Be compared obtain it is satisfactory compare ac signal, and ac signal will be compared be converted into square-wave pulse signal, side
Wave pulse signal input micro controller module carries out timing treatment, and output campaign object is in the light the time.
So, without motion object by light path when produce direct current signal, when there is moving object by light path, signal has
Pulse change, then timing is carried out for pulse signal, obtain being in the light the time for moving object.
Further, the reference voltage is 0.7V
It is an advantage of the invention that it is reasonable in design, it is low in energy consumption, it is easy to use, it is capable of being in the light the time for accurate measurement moving object, tie
Accurately and reliably, and low production cost, environmental suitability is strong for fruit, can in the sun, in indoor, dark surrounds reliablely and stablely
Work.
Brief description of the drawings
The present invention is further illustrated below in conjunction with the accompanying drawings.
Fig. 1 is the structural representation of one embodiment of the invention.
Fig. 2 is circuit theory diagrams of the invention.
Fig. 3 is the scheme of installation of photoelectric tube in the present invention.
Specific embodiment
Embodiment one
The moving object of the environment resistant light interference of the present embodiment is in the light time measurement device, and its structure is as shown in figure 1, including photoelectricity
To managing, the termination power being connected with the output end of photoelectric tube, the signal amplification module being connected with the output end of termination power, with
The signal comparison module of the output end connection of signal amplification module and the microcontroller being connected with the output end of signal comparison module
Device module, and photoelectric tube, termination power, signal amplification module, signal comparison module and micro controller module are and power supply
Module is connected.Wherein, photoelectric tube is used to convert optical signal into electric signal, and electric signal is passed into termination power；Coupling
Circuit is used to receive the electric signal of photoelectric tube transmission and further filter out constant ambient light interference signal to obtain the letter that is in the light
Number, then give signal amplification module by the signal transmission that is in the light that filtering environmental light is disturbed；Signal amplification module is used to receive and amplify
The signal that is in the light that termination power sends；Signal comparison module is used to receiving being in the light for signal amplification module transmission signal and will be in the light
Signal is converted into square-wave pulse signal；Micro controller module is used to receive the square-wave pulse signal and right of signal comparison module transmission
Square-wave pulse signal carries out timing, to obtain object by the time between photoelectric tube.
Photoelectric tube is made up of transmitting tube 1 and reception pipe 2, and the light path between transmitting tube 1 and reception pipe 2 is provided with parallel cloth
The first light barrier 3 and the second light barrier 4 put.The middle part of the first light barrier 3 has first extended along its vertical direction
Elongated hole 5, the middle part of the second light barrier 4 has second elongated hole 6 extended along its vertical direction, and the first elongated hole
5 and second elongated hole 6 be located on same vertical plane.First elongated hole 5, the second elongated hole 6 process the light path between photoelectric tube
Into narrow parallel light path, for reducing the interference component of ambient light, while improving object 7 enters the sensitive of photoelectricity tube reaction
Degree, reaches the purpose that object 7 enters the instantaneous fully shading light road of light path, and sign mutation is obvious when object 7 is entered light path.
As shown in Fig. 2 transmitting tube 1 is infrarede emitting diode D1（Model PT928）, it is red for launching infrared signal
One end ground connection of UV light-emitting diode D1, the other end passes through the R1 of resistance one（100 ohm of resistance）PhotoGate-VCC is met, is received
Pipe 2 is infrared receiving diode D2（Model PT928-6C）, for receiving infrared signal, ambient light signal etc., and by light
Signal is converted into electric signal, and one end ground connection of infrared receiving diode D2, the other end passes through the R2 of resistance two（Resistance is 5.1K）Connect
PhotoGate-VCC.Termination power includes coupled capacitor C1（Capacitance is 100nF）, a termination of coupled capacitor C1 is infrared to be connect
Receive the output end of diode D2, the R8 of another terminating resistor eight（Resistance is 1K）Input.Signal amplification module includes the first collection
Into circuit U 1（Model LMC6061）, the 4 pin ground connection of the first integrated circuit U1,7 pin meet PhotoGate-VCC, and 3 pin connect over the ground
The C2 of electric capacity two in parallel（Capacitance is 100nF）With the R6 of resistance six（Resistance is 5.1K）, the output end of the R8 of 2 pin connecting resistance eight, 6
Pin meets the C4 of electric capacity four（Capacitance is 100nF）Input, in addition the C2 of the electric capacity two in parallel over the ground and R6 of resistance six pass through resistance
Three R3（Resistance is 10K）Meet PhotoGate-VCC, and the R9 of parallel resistance nine between 2 pin, 6 pin in the first integrated circuit U1
（Resistance is 5.1K）, i.e. the output end of a terminating resistor R8 of the R9 of resistance nine, the input of another termination capacitor C4.Signal compares
Module includes the second integrated circuit U2（COMPARATOR）, the 2 pin ground connection of the second integrated circuit U2,5 pin meet PhotoGate-
VCC, 3 pin meet the C3 of electric capacity three in parallel over the ground（Capacitance is 100nF）With the R7 of resistance seven（Resistance is 2K）, 4 pin meet the C4 of electric capacity four
Output end, 1 pin meets micro controller module MCU, and the C3 of the electric capacity three in parallel over the ground and R7 of resistance seven passes through the R4 of resistance four in addition（Resistance
It is 10K to be worth, error 1%）Connect PhotoGate-VCC, 1 pin of the second integrated circuit U2 and the indirect resistance of micro controller module MCU
Five R5（Resistance is 10K, error 1%）, the R5 of resistance five meets PhotoGate-VCC.
In actual use, the light path between transmitting tube 1 and reception pipe 2 is elongated by the first parallel elongated hole 5, second
Hole 6 is filtered, and when testee 7 is not by light path, reception pipe 2 receives ambient light signal, and by ambient light signal and transmitting tube
The launching light Signal averaging optical signal together of 1 transmitting is converted into electric signal, electric signal through after overcoupled circuits by direct current
The ambient light rejection of composition falls；Hair loss can be blocked when testee 7 is by light path and penetrates optical signal, produce a light letter for change
Number, the optical signal is superimposed with ambient light signal and be converted into electric signal by reception pipe 2, and electric signal is filtered by termination power
The flip-flop of ambient light, only remains the change alternating component that is converted into of optical signal, and alternating component is a series of by amplifying, comparing etc.
Micro controller module is admitted to after treatment carries out timing treatment, finally obtains accurately moving object and is in the light the time, the device energy
It is enough effectively to reduce influence of the external light source to certainty of measurement.
A kind of moving object of environment resistant light of the present embodiment interference Method Of Time Measurement that is in the light is comprised the following steps：
The first step, transmitting tube 1 and reception pipe 2 that composition photoelectric tube is installed, it is ensured that the distance between transmitting tube 1 and reception pipe 2
It is 19mm；Go to second step；
Second step, transmitting terminal the first light barrier 3 of installation in transmitting tube 1, the second light barrier 4 is installed in the receiving terminal of reception pipe 2,
First light barrier 3, the second light barrier 4 are arranged in parallel, and ensure that the distance between light barrier 3 of transmitting tube 1 and first, for 2mm, connects
The distance between light barrier 4 of closed tube 2 and second is 2mm；Go to the 3rd step；
3rd step, first the output end of reception pipe 1 is connected with termination power, then be sequentially connected termination power, signal amplification module,
Signal comparison module, micro controller module；Go to the 4th step or the 5th step；
4th step, when light path does not have object 7 to pass through between transmitting tube 1 and reception pipe 2, transmitting tube 1 transmitting infrared signal
Reception pipe 2 is input into after being superimposed with ambient light signal, be converted into the optical signal after infrared light and environment optical superposition directly by reception pipe
Stream electric signal, DC signal input coupling circuit, the direct current telecommunications that termination power changes constant ambient light and infrared light
Number filter；
5th step, when object is by light path between transmitting tube 1 and reception pipe 2, transmitting tube 1 transmitting infrared light passive movement object
7 block, and produce the optical signal of a change, the optical signal of change to be received by reception pipe 2 after being superimposed with constant ambient light signal, connect
The optical signal of change is converted into ac signal by closed tube 2, and constant ambient light signal is passed to after being converted into DC signal
Termination power, termination power is filtered treatment to electric signal, filters DC signal and obtains ac signal, ac signal
Input signal amplification module is amplified the ac signal that treatment is amplified, and the ac signal input signal of amplification compares
The reference voltage that module is provided with signal comparison module（Reference voltage is 0.7V）It is compared and obtains satisfactory comparing friendship
Electric signal is flowed, and ac signal will be compared and be converted into square-wave pulse signal, square-wave pulse signal input micro controller module enters
Row timing is processed, and output campaign object 7 is in the light the time.
After micro controller module receives square-wave pulse signal, to its rising edge and trailing edge respectively carry out start timing and
Terminate timing, finally give the time of this pulse width.
Embodiment two
The present embodiment is with the difference of embodiment one：One is respectively provided with the middle part of first light barrier to prolong along its vertical direction
The first slit stretched, be respectively provided with the middle part of the second light barrier one along its vertical direction extend the second slit, the first slit with
Second slit is located on same vertical plane.Therefore, it is parallel light path by the light path of first, second slit, slit is by optical path signal
Parallel thin seam is processed into, to reduce the interference volume of ambient light, object is improved and is entered the sensitivity reacted during photoelectric tube light path,
It is finally reached that object is instantaneous, the electric purpose to light path between pipe of fully shading light.
The specific mounting structure of photoelectric tube is shown in Fig. 3, and transmitting tube 1 is arranged in the first housing 8, in the first housing 8
Side is provided with the first light barrier 3, has the first slit 10 extended along its vertical direction on the first light barrier 3, and reception pipe 2 is arranged on
In second housing 9, the inner side of the second housing 9 is provided with the second light barrier 4, has on the second light barrier 4 and extends along its vertical direction
The second slit 11.
In addition to the implementation, the present invention can also have other embodiment.All use equivalents or equivalent transformation shape
Into technical scheme, all fall within the protection domain of application claims.
Claims (10)
1. the moving object of a kind of environment resistant light interference is in the light time measurement device, it is characterized in that：Including photoelectric tube, for inciting somebody to action
Optical signal is converted into electric signal, and electric signal is passed into termination power；
Termination power, for receiving the electric signal of photoelectric tube transmission and further filtering out constant ambient light interference signal to obtain
Must be in the light signal, then give signal amplification module by the signal transmission that is in the light that filtering environmental light is disturbed；
Signal amplification module, for the signal that is in the light for receiving and amplification coupling circuit sends；
Signal comparison module, the signal and signal that will be in the light is converted into square-wave pulse of being in the light for receiving the transmission of signal amplification module
Signal；
Micro controller module, based on receiving the square-wave pulse signal of signal comparison module transmission and carrying out to square-wave pulse signal
When, to obtain object by the time between photoelectric tube；
Light path between the photoelectric tube is provided with light barrier, has on the light barrier for filtering the flat of component environment light
Row light slit.
2. a kind of moving object of environment resistant light interference is in the light time measurement device according to claim 1, it is characterized in that：Institute
State photoelectric tube to be made up of transmitting tube and reception pipe, the light path between the transmitting tube and reception pipe is provided with the of parallel arrangement
One light barrier and the second light barrier.
3. a kind of moving object of environment resistant light interference is in the light time measurement device according to claim 2, it is characterized in that：Institute
State and a slit extended along its vertical direction or elongated hole are respectively provided with the middle part of first, second light barrier, and described first
The slit or elongated hole of light barrier are located on same vertical plane with the slit of the second light barrier or elongated hole.
4. a kind of moving object of environment resistant light interference is in the light time measurement device according to claim 1, it is characterized in that：Institute
Photoelectric tube, termination power, signal amplification module, signal comparison module and micro controller module is stated to be connected with power module.
5. a kind of moving object of environment resistant light interference is in the light time measurement device according to claim 2, it is characterized in that：Institute
Transmitting tube is stated for infrarede emitting diode, one end of the infrarede emitting diode is grounded, and the other end meets VCC by resistance one,
The reception pipe is infrared receiving diode, and one end of the infrared receiving diode is grounded, and the other end is connect by resistance two
VCC。
6. a kind of moving object of environment resistant light interference is in the light time measurement device according to claim 5, it is characterized in that：Institute
Stating termination power includes coupled capacitor, the output end of a termination infrared receiving diode of the coupled capacitor, another termination electricity
The input of resistance eight.
7. a kind of moving object of environment resistant light interference is in the light time measurement device according to claim 6, it is characterized in that：Institute
Stating signal amplification module includes the first integrated circuit, and 4 pin of first integrated circuit are grounded, and 7 pin meet VCC, and 3 pin connect over the ground simultaneously
The electric capacity two and resistance six of connection, the output end of 2 pin connecting resistances eight, 6 pin connect the input of electric capacity four, over the ground electric capacity two in parallel
VCC is connect by resistance three with resistance six, and parallel resistance nine between 2 pin, 6 pin in first integrated circuit.
8. a kind of moving object of environment resistant light interference is in the light time measurement device according to claim 7, it is characterized in that：Institute
Stating signal comparison module includes the second integrated circuit, and 2 pin of second integrated circuit are grounded, and 5 pin meet VCC, and 3 pin connect over the ground simultaneously
The electric capacity three and resistance seven of connection, 4 pin connect the output end of electric capacity four, and 1 pin connects micro controller module, over the ground the He of electric capacity three in parallel
Resistance seven connects VCC, 1 pin of second integrated circuit and the indirect resistance five of micro controller module, the electricity by resistance four
Resistance five meets VCC.
9. the moving object of a kind of environment resistant light interference according to any one of claim 1 to 8 is in the light Method Of Time Measurement, its
It is characterized in comprise the following steps：
The first step, transmitting tube and reception pipe that composition photoelectric tube is installed, it is ensured that the distance between transmitting tube and reception pipe are 19
±5mm；Go to second step；
Second step, transmitting terminal the first light barrier of installation in transmitting tube, the second light barrier is installed in the receiving terminal of reception pipe, the
First, the second light barrier parallel arrangement, and ensure the distance between transmitting tube and the first light barrier for 2 ± 1mm, reception pipe and second
The distance between light barrier is 2 ± 1mm；Go to the 3rd step；
3rd step, first the output end of reception pipe is connected with termination power, then be sequentially connected termination power, signal amplification module,
Signal comparison module, micro controller module；Go to the 4th step or the 5th step；
4th step, when light path does not have object to pass through between transmitting tube and reception pipe, transmitting optical signal and ring that transmitting tube sends
Reception pipe is input into after the optical signal superposition of border, the optical signal after launching light and environment optical superposition is converted into electric signal by reception pipe,
Electric signal input coupling circuit, termination power filters the DC signal of constant ambient light signal and transmitting optical signal conversion
Remove；
5th step, when object is by light path between transmitting tube and reception pipe, tube-launched infrared light passive movement object hides
Gear, produces the optical signal of a change, the optical signal of change to be received by reception pipe after being superimposed with constant ambient light signal, reception pipe
The optical signal of change is converted into ac signal, constant ambient light signal passes to coupling electricity after being converted into DC signal
Road, termination power is filtered treatment to electric signal and obtains ac signal, and ac signal input signal amplification module is carried out
The ac signal that enhanced processing is amplified, ac signal input signal comparison module and the given reference voltage of amplification
Be compared obtain it is satisfactory compare ac signal, and ac signal will be compared be converted into square-wave pulse signal, side
Wave pulse signal input micro controller module carries out timing treatment, and output campaign object is in the light the time.
10. a kind of moving object of environment resistant light interference is in the light Method Of Time Measurement according to claim 9, it is characterized in that,
The reference voltage is 0.7V.
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Cited By (3)
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| CN110132323A (en) * | 2019-04-23 | 2019-08-16 | 深圳市志奋领科技有限公司 | A kind of removing method and device of ambient light interference |
| CN113111671A (en) * | 2021-04-08 | 2021-07-13 | 温州大学 | Cup-sealing membrane electric eye circuit |
| WO2024140490A1 (en) * | 2022-12-27 | 2024-07-04 | 北京津发科技股份有限公司 | Optical signal processing method and system, continuous blood-pressure measurement method, electronic device, and medium |
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| CN113111671A (en) * | 2021-04-08 | 2021-07-13 | 温州大学 | Cup-sealing membrane electric eye circuit |
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Application publication date: 20170531 |