CN105866763A - Time delay detection device and method - Google Patents
Time delay detection device and method Download PDFInfo
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- CN105866763A CN105866763A CN201610177734.6A CN201610177734A CN105866763A CN 105866763 A CN105866763 A CN 105866763A CN 201610177734 A CN201610177734 A CN 201610177734A CN 105866763 A CN105866763 A CN 105866763A
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- China
- Prior art keywords
- signal
- infrared light
- pulse width
- master controller
- measured
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/497—Means for monitoring or calibrating
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S11/00—Systems for determining distance or velocity not using reflection or reradiation
- G01S11/12—Systems for determining distance or velocity not using reflection or reradiation using electromagnetic waves other than radio waves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
- G01S17/06—Systems determining position data of a target
- G01S17/08—Systems determining position data of a target for measuring distance only
Abstract
The invention provides a time delay detection device and method, and the device comprises a main controller, an infrared light transmitting unit, an infrared light receiving unit, and a signal comparison unit. The main controller comprises a clock counter, and is connected with the infrared light transmitting unit. The infrared light receiving unit is connected with the infrared light transmitting unit and the signal comparison unit. The signal comparison unit is also connected with the main controller. The signal comparison unit is used for processing a received drive signal and an output signal so as to obtain a to-be-detected pulse width signal, and transmitting the to-be-detected pulse width signal to the main controller. The clock counter is used for obtaining the number of high-frequency pulses corresponding to the pulse width of the to-be-detected pulse width signal, and obtaining the delay time according to the obtained number of high-frequency pulses and the frequencies of the high-frequency pulses. According to the embodiment of the invention, the device can detect the delay time of an infrared light drive circuit, thereby enabling the result of measuring the distance between a camera and a target object through the TOF technology to be higher in accuracy.
Description
Technical field
The present invention relates to circuit arrangement field, in particular to a kind of time delay detection device
And method.
Background technology
TOF (Time of Flight) technology is by measuring light at video camera and target object
Two-way time, determine the distance of target object and video camera.TOF three-dimensional image forming apparatus,
Having algorithm simple, hardware designs flexibly and is prone to the advantages such as miniaturization.Actual three-dimensional
Imaging is widely used.
At present in TOF 3-D imaging system, usually not measure infrared light drive circuit and cause
The testing circuit of time delay, therefore also exists the time delays caused by infrared light drive circuit,
It is considered the target object problem to the time delays of video camera, so makes three-dimensional imaging system
The target object that unified test measures arrives shooting to the two-way time of video camera than realistic objective object
Want the two-way time of machine big, cause the target object that 3-D imaging system measurement obtains to shooting
The distance of machine is bigger than the actual range of target object to video camera.3-D imaging system is surveyed
The result precision measured reduces.
Summary of the invention
In view of this, embodiments provide a kind of time delay detection device and method, with
Improve the existing time delays caused due to infrared light drive circuit and cause target object with
The measurement distance of video camera is more than the problem of the actual range of target object to video camera.
For achieving the above object, the following technical scheme of embodiment of the present invention offer:
A kind of time delay detection device, including master controller, infrared light transmitter elements, infrared light
Receive unit and signal comparing unit.Described master controller includes clock counter, described
Master controller is connected with described infrared light transmitter elements, and described infrared light receiving unit is respectively
Being connected with described infrared light transmitter elements and signal comparing unit, described signal is more single
Unit is also connected with described master controller.Described infrared light transmitter elements is for by described master control
The driving signal that device processed sends is modulated to optical signal.Described infrared light receiving unit is for by institute
The described optical signal received is converted to the signal of telecommunication.Described signal comparing unit is for being received
The output driving signal and described infrared light receiving unit to send that sends of described master controller
Signal carries out processing to obtain pulse width signal to be measured, and is sent extremely by described pulse width signal to be measured
Described master controller.Described clock counter is for obtaining the pulse of described pulse width signal to be measured
The high-frequency impulse number that width is corresponding, according to the high-frequency impulse number obtained and described height
The frequency of pulse frequently obtains delay time.
The embodiment of the present invention additionally provides a kind of delay detection method, described infrared light emission list
The driving signal that described master controller is sent by unit is modulated to optical signal；Described infrared light receives
The described optical signal received is converted to the signal of telecommunication by unit；Described signal comparing unit is by institute
What the described master controller received sent drives signal and described infrared light receiving unit to send
Output signal carries out processing to obtain pulse width signal to be measured, and is sent out by described pulse width signal to be measured
Deliver to described master controller；Described clock counter obtains the pulse of described pulse width signal to be measured
The high-frequency impulse number that width is corresponding, according to the high-frequency impulse number obtained and described height
The frequency of pulse frequently obtains delay time.
The time delay detection device of embodiment of the present invention offer and method, have the advantages that
Time delay detection device and method that the embodiment of the present invention provides include master controller, infrared
Optical Transmit Unit, infrared light receiving unit and signal comparing unit.Described master controller bag
Including clock counter, described master controller is connected with described infrared light transmitter elements, described
Infrared light receiving unit is connected with described infrared light transmitter elements and signal comparing unit respectively
Connecing, described signal comparing unit is also connected with described master controller.Described infrared light emission
Unit is modulated to optical signal for the driving signal sent by described master controller.Described infrared
Light receiving unit is for being converted to the signal of telecommunication by the described optical signal received.Described signal ratio
Relatively unit is for the driving signal sent by the described master controller received and described infrared light
The output signal that reception unit sends carries out processing to obtain pulse width signal to be measured, and by described
Pulse width signal to be measured sends to described master controller.Described clock counter is used for obtaining described
The high-frequency impulse number that the pulse width of pulse width signal to be measured is corresponding, according to the high frequency obtained
The frequency of pulse number and described high-frequency impulse obtains delay time.The embodiment of the present invention carries
The time delay detection device of confession can detect the delay time of infrared light drive circuit so that getting profit
Higher with the result precision of the distance of target object with TOF commercial measurement video camera.
Accompanying drawing explanation
For the clearer explanation embodiment of the present invention or technical scheme of the prior art, under
The accompanying drawing used required in embodiment or description of the prior art will be briefly described by face,
It should be evident that the accompanying drawing in describing below is only some embodiments of the present invention, for
From the point of view of those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to
Other accompanying drawing is obtained according to these accompanying drawings.
Fig. 1 is the module frame chart of the time delay detection device that first embodiment of the invention provides；
Fig. 2 is the module frame chart of the time delay detection device that second embodiment of the invention provides；
Fig. 3 is the schematic diagram of the signal that signal comparing unit receives；
Fig. 4 is the flow chart of the delay detection method that third embodiment of the invention provides；
Fig. 5 is the flow chart of the delay detection method that fourth embodiment of the invention provides.
Detailed description of the invention
Below in conjunction with accompanying drawing in the embodiment of the present invention, to the technical side in the embodiment of the present invention
Case is clearly and completely described, it is clear that described embodiment is only the present invention one
Section Example rather than whole embodiments.Below to the present invention provided in the accompanying drawings
The detailed description of embodiment be not intended to limit the scope of claimed invention, but
It is merely representative of the selected embodiment of the present invention.Based on embodiments of the invention, art technology
The every other embodiment that personnel are obtained on the premise of not making creative work, all
Belong to the scope of protection of the invention.
Details refer to the time delay inspection that Fig. 1, Fig. 1 show that first embodiment of the invention provides
Survey the module diagram of device, including master controller 110, infrared light transmitter elements 120, red
Outer light receiving unit 130 and signal comparing unit 140.Described master controller 110 includes
Clock counter 111, described master controller 110 and described infrared light transmitter elements 120 phase
Connect, described infrared light receiving unit 130 respectively with described infrared light transmitter elements 120 with
And signal comparing unit 140 is connected, described signal comparing unit 140 also with described master control
Device 110 processed is connected.
Described infrared light transmitter elements 120 may be used for sending described master controller 110
Signal is driven to be modulated to optical signal.Described infrared light receiving unit 130 may be used for from red
The described optical signal that outer Optical Transmit Unit 120 is received is converted to the signal of telecommunication, and by the signal of telecommunication
It is transferred to signal comparing unit 140 as output signal.
Described signal comparing unit 140 may be used for the described master controller 110 that will be received
At the output signal driving signal and described infrared light receiving unit 130 to send sent
Reason is to obtain pulse width signal to be measured, and sends described pulse width signal to be measured to described main control
Device 110.
Drive signal to be sent by master controller 110 and be transferred directly to described signal comparing unit
140, output signal connects through master controller 110, infrared light transmitter elements 120, infrared light
Receive unit 130 and be transferred to signal comparing unit 140, therefore described output signal arrives described letter
The time of number comparing unit 140 can be later than drive signal arriving signal comparing unit 140 time
Between, details refer to Fig. 3.
Specifically, described signal comparing unit 140 can be XOR gate, and XOR gate can be by
After driving signal to arrive, the part output high level that output signal not yet arrives, and will drive
The part output low level that signal and output signal all do not arrive or the most arrived, thus obtain
Pulse width signal to be measured.
Described signal comparing unit 140 can also be single-chip microcomputer, and single-chip microcomputer record drives signal
After arrival, part that output signal not yet arrives also is output as high level, and records driving letter
Number part all not arriving with output signal or the most having arrived is output as low level.
Described clock counter 111 is for obtaining the pulse width pair of described pulse width signal to be measured
The high-frequency impulse number answered, according to the high-frequency impulse number obtained and described high-frequency impulse
Frequency obtain delay time.
Specifically, master controller 110 can be according to the rising edge of pulse width signal to be measured as rising
Beginning signal, and according to the trailing edge of pulse width signal to be measured as stopping signal.Described clock meter
Number device 111 can be with record start signal and the height of the clock counter 111 stopped between signal
Frequently pulse number N.
Described clock counter 111 can be from the beginning of initial signal, with the rising of high-frequency impulse
Along as count flag, the most often receive the rising edge of a high-frequency impulse, once count,
Until receiving stopping signal, in the process, recorded high-frequency impulse number N.
Described master controller 110 is according to high-frequency impulse number N recorded and clock counter
111 self high-frequency clock pulse frequencies f, it is possible to obtain delay time Δ t, wherein Δ t=N/f.
Should first obtain initial signal and the high frequency of clock counter 111 stopped between signal
Pulse number N, then further according to cycle and the above-mentioned high-frequency impulse of each high-frequency impulse
Number is multiplied, and i.e. can obtain delay time.Wherein, the cycle of high-frequency impulse is high frequency clock
The inverse of pulse frequency f.
The time delay detection device that first embodiment of the invention provides can detect infrared light emission list
The delay time of unit 120.Owing to TOF technology is by measuring light at video camera and object
Determine the distance of video camera and target object the two-way time of body, and when detecting that infrared light is sent out
Penetrate the delay time of unit 120, and when being removed by this delay time, measurement can be improved
The certainty of measurement of the distance of video camera and target object.
Specifically, described signal comparing unit 140 can be XOR gate.Described XOR gate connects
Receive described driving signal and output signal, by the level of described driving signal and output signal not
Same part output high level, the portion identical with the level of output signal by described driving signal
Output low level, the high level of described XOR gate output is divided to be specially described pulse width signal to be measured
Pulse width.
Drive signal to be sent by master controller 110 and be transferred directly to described signal comparing unit
140, output signal connects through master controller 110, infrared light transmitter elements 120, infrared light
Receive unit 130 and be transferred to signal comparing unit 140, therefore described output signal arrives described letter
The time of number comparing unit 140 can be later than drive signal arriving signal comparing unit 140 time
Between, details refer to Fig. 3.
Signal comparing unit 140 is specifically as follows XOR gate, due to the character of XOR gate, and can
The signal part different from the level of output signal will be driven to export high level, i.e. can be by
Driving signal has arrived at XOR gate and output signal not yet arrives the part of XOR gate with high electricity
Flat mode exports, it is possible to the high level that XOR gate exports is designated as pulse width signal to be measured
Pulse width, the time corresponding to pulse width that computing is above-mentioned the most again, i.e. can obtain
Delay time.
Specifically, described infrared light transmitter elements 120 can include infrared light supply drive circuit
121 and infrarede emitting diode 122, details refer to Fig. 2.Described infrared light supply drives
Circuit 121 respectively with described master controller 110 and described infrarede emitting diode 122 phase
Connect.
It is appreciated that infrared light supply drive circuit 121 is specifically as follows impulse wave modulation and drives
Circuit, it is also possible to for ohmic load drive circuit, described infrared light supply drive circuit 121
It is limitation of the present invention that particular type should not be construed.
Described infrared light receiving unit 130 can include infrared light reception diode 131 and
Trans-impedance amplifier 132, details refer to Fig. 2.Described infrared light reception diode 131 and institute
State trans-impedance amplifier 132 to connect.
Described infrared light reception diode 131 may be used for receiving infrared light emitting diodes and sends out
The optical signal gone out, it is possible to convert optical signals to current signal.
Described trans-impedance amplifier 132 is for sending described infrared light reception diode 131
Described current signal is converted to voltage signal.
Trans-impedance amplifier 132 is to be amplified input current signal, is output as voltage signal
Circuit.This class A amplifier A has the dimension of resistance, is expressed as V/A or Ω, is referred to as and amplifies
Device across resistance.Specifically, described trans-impedance amplifier 132 can be to use AD8015 to constitute
Trans-impedance amplifier circuit, it is also possible to be OPA847 constitute trans-impedance amplifier circuit, tool
It is limitation of the present invention that the circuit constituting trans-impedance amplifier of body should not be construed.
Described infrared light receiving unit 130 specifically can also include post-amplifier 133, institute
State post-amplifier 133 to be connected with described trans-impedance amplifier 132 and described XOR gate respectively
Connecing, details refer to Fig. 2.Described post-amplifier 133 is used for amplifying and described amplifies across resistance
The voltage signal of device 132 transmission the described voltage signal after amplifying send to described XOR
Door.
It is appreciated that described post-amplifier 133 can be put with OCL amplifying circuit, OTL
One or more in big circuit, BTL amplifying circuit, it is also possible to be that operational amplifier is constituted
Amplifying circuit.It is to this that the particular type of described post-amplifier 133 should not be construed
The restriction of invention.
Details refer to Fig. 4, Fig. 4 and show that the one shown in third embodiment of the invention is prolonged
Time detection method, comprise the steps that S101 is to step S104:
Step S101, the driving signal that master controller is sent by infrared light transmitter elements is modulated to
Optical signal.
After the driving signal that master controller is sent by infrared light transmitter elements is modulated to optical signal,
And optical signal is transferred to infrared light receiving unit.
Step S102, the optical signal received is converted to the signal of telecommunication by infrared light receiving unit.
The optical signal received is converted to the signal of telecommunication later by above-mentioned by infrared light receiving unit
The signal of telecommunication is transferred to signal comparing unit.
Step S103, the driving signal that the master controller received is sent by signal comparing unit
The output signal sent with infrared light receiving unit carries out processing to obtain pulse width signal to be measured,
And pulse width signal to be measured is sent to master controller.
Signal comparing unit is specifically as follows XOR gate, due to the character of XOR gate, and can be by
Drive the part output high level that signal is different from the level of output signal, i.e. can will drive
Signal has arrived at XOR gate and output signal not yet arrives the part of XOR gate with high level
Mode exports, and details refer to Fig. 3.
Step S104, clock counter obtains the height corresponding to pulse width of pulse width signal to be measured
Frequently pulse number, obtains according to the frequency of the high-frequency impulse number obtained and high-frequency impulse
Delay time.
Clock counter can according to the rising edge of pulse width signal to be measured as initial signal, and
Trailing edge according to pulse width signal to be measured is as stopping signal.Clock counter can record
High-frequency impulse number N of the clock counter between beginning signal and stopping signal.Clock count
Device is according to high-frequency impulse number N recorded and the high-frequency clock pulse of clock counter self
Frequency f, it is possible to obtain delay time Δ t, wherein Δ t=N/f.
It is the time delay detection side that fourth embodiment of the invention provides that details refer to Fig. 5, Fig. 5
Method, specifically includes following steps S201 to S204:
Step S201, the driving signal that master controller is sent by infrared light transmitter elements is modulated to
Optical signal.
Step S202, the optical signal received is converted to the signal of telecommunication by infrared light receiving unit.
Step S201 is corresponding with step S101 to step S102 identical to step S202,
This does not repeats.
Step S203, XOR gate receives and drives signal and output signal, and signal will be driven with defeated
Go out the part output high level that the level of signal is different, the electricity of signal and output signal will be driven
Flat identical part output low level, the high level of XOR gate output is pulse width signal to be measured
Pulse width, pulse width signal to be measured is also sent to master controller by XOR gate.
Drive signal to be sent by master controller and be transferred directly to signal comparing unit, output signal
It is transferred to signal compares through master controller, infrared light transmitter elements, infrared light receiving unit
Unit, thus output signal arrive signal comparing unit time can be later than driving signal arrive letter
The time of number comparing unit, details refer to Fig. 3.
Due to the character of XOR gate, signal can will be driven different from the level of output signal
Part output high level, i.e. signal can will be driven to have arrived at XOR gate and output signal still
The part not arriving XOR gate exports in the way of high level.
Step S204, master controller also includes pulse width measurement circuit, and pulse width measurement circuit is to treat
Survey the initial signal that rising edge is clock counter of pulse width signal, with pulse width signal to be measured
Trailing edge is the stopping signal of clock counter, it is thus achieved that between initial signal and stopping signal
High-frequency impulse number N of clock counter record, pulse width measurement circuit is according to clock counter
High-frequency clock pulse frequency f and high-frequency impulse number N, it is thus achieved that delay time Δ t.
Described pulse width measurement circuit should first obtain initial signal and the clock stopped between signal
High-frequency impulse number N of enumerator, then further according to cycle of each high-frequency impulse with above-mentioned
High-frequency impulse number be multiplied, i.e. can obtain delay time.Wherein, the week of high-frequency impulse
Phase is the inverse of high-frequency clock pulse frequency f.
Time delay detection device and method that the embodiment of the present invention provides include master controller, infrared
Optical Transmit Unit, infrared light receiving unit and signal comparing unit.Described master controller bag
Including clock counter, described master controller is connected with described infrared light transmitter elements, described
Infrared light receiving unit is connected with described infrared light transmitter elements and signal comparing unit respectively
Connecing, described signal comparing unit is also connected with described master controller.Described infrared light emission
Unit is modulated to optical signal for the driving signal sent by described master controller.Described infrared
Light receiving unit is for being converted to the signal of telecommunication by the described optical signal received.Described signal ratio
Relatively unit is for the driving signal sent by the described master controller received and described infrared light
The output signal that reception unit sends carries out processing to obtain pulse width signal to be measured, and by described
Pulse width signal to be measured sends to described master controller.Described clock counter is used for obtaining described
The high-frequency impulse number that the pulse width of pulse width signal to be measured is corresponding, according to the high frequency obtained
The frequency of pulse number and described high-frequency impulse obtains delay time.The embodiment of the present invention carries
The time delay detection device of confession can detect the delay time of infrared light drive circuit so that getting profit
Higher with the result precision of the distance of target object with TOF commercial measurement video camera.
For making the purpose of the embodiment of the present invention, technical scheme and advantage clearer, knot above
Close the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention has been carried out clearly
Chu, it is fully described by, it is clear that described embodiment is a part of embodiment of the present invention,
Rather than whole embodiments.Generally implement with the present invention illustrated described in accompanying drawing herein
The assembly of example can be arranged with various different configurations and design.
Therefore, the detailed description of the above embodiments of the invention to providing in the accompanying drawings is not
It is intended to limit the scope of claimed invention, but is merely representative of the selected reality of the present invention
Execute example.Based on the embodiment in the present invention, those of ordinary skill in the art are not making wound
The every other embodiment obtained under the property made work premise, broadly falls into the model of present invention protection
Enclose.
It should also be noted that similar label and letter represent similar terms in following accompanying drawing, because of
This, be defined in the most a certain Xiang Yi accompanying drawing, then it is right to need not in accompanying drawing subsequently
It defines further and explains.
In describing the invention, it should be noted that term " " center ", " on ", D score,
The orientation of the instruction such as "left", "right", " vertically ", " level ", " interior ", " outward " or position
Relation is based on orientation shown in the drawings or position relationship, or when this invention product uses
The orientation usually put or position relationship, be for only for ease of the description present invention and simplify description,
Rather than indicate or imply that the device of indication or element must have specific orientation, with specific
Azimuth configuration and operation, be therefore not considered as limiting the invention.Additionally, term
" first ", " second ", " the 3rd " etc. are only used for distinguishing and describe, and it is not intended that indicate
Or hint relative importance.
In describing the invention, in addition it is also necessary to explanation, unless otherwise clear and definite regulation and
Limiting, term " is arranged ", " installation ", " being connected ", " connection " should be interpreted broadly, such as,
It can be fixing connection, it is also possible to be to removably connect, or be integrally connected；It can be machine
Tool connects, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible to pass through intermediary
It is indirectly connected to, can be the connection of two element internals.Ordinary skill people for this area
For Yuan, above-mentioned term concrete meaning in the present invention can be understood with concrete condition.
Claims (10)
1. a time delay detection device, it is characterised in that include master controller, infrared light
Transmitter unit, infrared light receiving unit and signal comparing unit, described master controller includes
Clock counter, described master controller is connected with described infrared light transmitter elements, described red
Outer light receiving unit is connected with described infrared light transmitter elements and signal comparing unit respectively,
Described signal comparing unit is also connected with described master controller,
Described infrared light transmitter elements is for the driving signal modulation sent by described master controller
For optical signal；
Described infrared light receiving unit is for being converted to the signal of telecommunication by the described optical signal received；
Described signal comparing unit is for the driving letter sent by the described master controller received
Number and the output signal that sends of described infrared light receiving unit carry out processing to obtain pulsewidth to be measured
Signal, and described pulse width signal to be measured is sent to described master controller；
Described clock counter is corresponding for the pulse width obtaining described pulse width signal to be measured
High-frequency impulse number, according to the high-frequency impulse number obtained and the frequency of described high-frequency impulse
Rate obtains delay time.
Time delay detection device the most according to claim 1, it is characterised in that described
Signal comparing unit is XOR gate, and described XOR gate receives described driving signal and output signal,
By part output high level different from the level of output signal for described driving signal, by described
Driving the part output low level that signal is identical with the level of output signal, described XOR gate is defeated
The high level gone out is the pulse width of described pulse width signal to be measured.
Time delay detection device the most according to claim 2, it is characterised in that described
Master controller also includes pulse width measurement circuit, and described pulse width measurement circuit is with described pulsewidth to be measured
The rising edge of signal is the initial signal of described clock counter, with described pulse width signal to be measured
The stopping signal that trailing edge is described clock counter, it is thus achieved that described initial signal and stopping
High-frequency impulse number N of the described clock counter record between signal, described pulse width measure
Circuit is according to high-frequency clock pulse frequency f of described clock counter and described high-frequency impulse
Number N, it is thus achieved that delay time Δ t, wherein Δ t=N/f.
Time delay detection device the most according to claim 2, it is characterised in that described
Infrared light transmitter elements includes infrared light supply drive circuit and infrarede emitting diode, described
Infrared light supply drive circuit respectively with described master controller and described infrarede emitting diode phase
Connect.
Time delay detection device the most according to claim 4, it is characterised in that described
Infrared light receiving unit includes infrared light reception diode and trans-impedance amplifier, described infrared
Light receiving diode is connected with described trans-impedance amplifier,
The light letter that described infrared light reception diode sends for receiving infrared light emitting diodes
Number, and convert optical signals to current signal；
Described trans-impedance amplifier is for the described electric current sent by described infrared light reception diode
Signal is converted to voltage signal.
Time delay detection device the most according to claim 5, it is characterised in that described
Infrared light receiving unit also includes post-amplifier, described post-amplifier respectively with described across
Impedance amplifier and described XOR gate are connected,
Described post-amplifier is for amplifying the voltage signal of described trans-impedance amplifier transmission and inciting somebody to action
Described voltage signal after amplification sends to described XOR gate.
7. a delay detection method, it is characterised in that described method includes:
The driving signal that described master controller is sent by described infrared light transmitter elements is modulated to light
Signal；
The described optical signal received is converted to the signal of telecommunication by described infrared light receiving unit；
The driving signal that the described master controller received is sent by described signal comparing unit and
The output signal that described infrared light receiving unit sends carries out processing to obtain pulse width signal to be measured,
And described pulse width signal to be measured is sent to described master controller；
Described clock counter obtains the high frequency corresponding to pulse width of described pulse width signal to be measured
Pulse number, obtains according to the frequency of the high-frequency impulse number obtained and described high-frequency impulse
Obtain delay time.
Method the most according to claim 7, it is characterised in that described signal compares
Driving signal and described infrared light that the described master controller received is sent by unit receive single
The output signal that unit sends carries out processing to obtain pulse width signal to be measured, including:
XOR gate receives described driving signal and output signal, by described driving signal and output
The part that the level of signal is different exports high level, by described driving signal and output signal
The part output low level that level is identical, the high level of described XOR gate output is described to be measured
The pulse width of pulse width signal.
Method the most according to claim 8, it is characterised in that described master controller
Also including pulse width measurement circuit, described clock counter obtains the arteries and veins of described pulse width signal to be measured
Rush the high-frequency impulse number that width is corresponding, according to the high-frequency impulse number obtained and described
The frequency of high-frequency impulse obtains delay time, including:
Described pulse width measurement circuit is in terms of described clock by the rising edge of described pulse width signal to be measured
The initial signal of number device, is described clock counter with the trailing edge of described pulse width signal to be measured
Stopping signal, it is thus achieved that described initial signal and the described clock counter stopped between signal
High-frequency impulse number N of record, described pulse width measurement circuit is according to described clock counter
High-frequency clock pulse frequency f and described high-frequency impulse number N, it is thus achieved that delay time Δ t,
Wherein Δ t=N/f.
Method the most according to claim 8, it is characterised in that described infrared light connects
Receiving unit and include infrared light reception diode and trans-impedance amplifier, described infrared light receives two
Pole pipe is connected with described trans-impedance amplifier,
Described infrared light reception diode receives the optical signal that infrared light emitting diodes sends,
And convert optical signals to current signal；
The described current signal that described infrared light reception diode is sent by described trans-impedance amplifier
Be converted to voltage signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610177734.6A CN105866763B (en) | 2016-03-25 | 2016-03-25 | Time delay detection device and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610177734.6A CN105866763B (en) | 2016-03-25 | 2016-03-25 | Time delay detection device and method |
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| Publication Number | Publication Date |
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| CN105866763A true CN105866763A (en) | 2016-08-17 |
| CN105866763B CN105866763B (en) | 2019-02-22 |
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| CN201610177734.6A Active CN105866763B (en) | 2016-03-25 | 2016-03-25 | Time delay detection device and method |
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| CN107783140A (en) * | 2016-08-25 | 2018-03-09 | 左罗 | High-precision laser range finder and its distance-finding method |
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