CN107132543A - A kind of accurate range-measurement system of ultrahigh speed - Google Patents
A kind of accurate range-measurement system of ultrahigh speed Download PDFInfo
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- CN107132543A CN107132543A CN201710317080.7A CN201710317080A CN107132543A CN 107132543 A CN107132543 A CN 107132543A CN 201710317080 A CN201710317080 A CN 201710317080A CN 107132543 A CN107132543 A CN 107132543A
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- laser
- circuit
- diode
- signal
- measurement system
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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
- 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
- G01S17/10—Systems determining position data of a target for measuring distance only using transmission of interrupted, pulse-modulated waves
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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
- G01S7/483—Details of pulse systems
- G01S7/484—Transmitters
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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
- G01S7/483—Details of pulse systems
- G01S7/486—Receivers
Abstract
The invention discloses a kind of accurate range-measurement system of ultrahigh speed, the problem of solving poor prior art range accuracy, complicated circuit and high cost.The present invention includes logic control circuit, laser transmission circuit, laser pick-off circuit and optical module；Logic control circuit includes main completion logic control and the internal high speed fpga chip and peripheral circuit for being embedded with 32 arm processors and time difference measurement unit, laser transmission circuit includes high-speed driving circuit, pulsed laser diode and high speed amplification and rectification circuit, laser pick-off circuit includes avalanche diode, preposition I/V circuits, plus and blowup circuit and circuit for producing high voltage, and optical module includes cylindrical fixed frame, Laser emission module and laser pick-off module；The present invention has high-speed driving, Laser emission peak power is adjustable, Signal-to-Noise is high, cost is low, circuit reduction, confidentiality are high, range accuracy is fast at high speed and the characteristics of output laser eye safety.
Description
Technical field
The present invention relates to a kind of accurate range-measurement system of ultrahigh speed.
Background technology
With laser science and technology development, ranging field using laser ranging have at a high speed, efficiently and accurately measure it is excellent
Gesture, LDMS becomes the indispensable measuring apparatus in market.But its measurement accuracy of traditional laser ranging and survey
Measure frequency not high enough, while the circuit of conventional laser range-measurement system is more complicated, cost is high.Therefore, a ultrahigh speed is designed
Accurate range-measurement system, to solve the above mentioned problem present in conventional laser ranging, as the technical field technical staff urgently
The technical problem of solution.
The content of the invention
The technical problem to be solved in the present invention is：There is provided a kind of ultrahigh speed accurate range-measurement system, solve prior art ranging
The problem of low precision, circuit complexity and high cost.
To achieve the above object, the technical solution adopted by the present invention is as follows：
A kind of accurate range-measurement system of ultrahigh speed, including logic control circuit, laser transmission circuit, laser pick-off circuit, with
And optical module；
The logic control circuit includes main completion logic control and inside is embedded with 32 arm processors and the time difference surveys
The peripheral circuit measured the high speed fpga chip of unit and be connected with the high speed fpga chip, the time difference measurement unit master
It is used to produce difference narrow pulse signal and is integrated with LVDS control units and high-precision delay line, 32 ARM
Reason device is mainly used in reading and controls the time difference signal inside FPGA and carry out high-speed data computing, at 32 ARM
DAC/ADC units and SPI/I are integrated with reason device2C interface；
The laser transmission circuit includes producing the high speed that difference narrow pulse signal output end is connected with high speed fpga chip
Drive circuit, the pulsed laser diode being connected with the output end of the high-speed driving circuit and high speed amplification and rectification circuit,
The pulsed laser diode is connected by high speed amplification and rectification circuit with high-precision delay line；
The preposition I/V electricity that the laser pick-off circuit includes avalanche diode, is connected with the N poles of the avalanche diode
Road, the efficient gain for being connected with the output end of preposition I/V circuits and differential amplification being carried out to the signals of the preposition I/V circuit outputs
Amplifying circuit and the circuit for producing high voltage being connected with the trigger electrode of the avalanche diode, the efficient gain amplifying circuit
Output difference LVDS signals and its output end is connected with LVDS control units, the circuit for producing high voltage is made up of dc/dc circuits
And its control port is connected with DAC/ADC units；
The optical module include cylindrical fixed frame, the Laser emission module in cylindrical fixed frame and
Laser pick-off module, the Laser emission module is located at the Laser emission end of pulsed laser diode and is used for pulse laser two
The laser of pole pipe transmitting carries out expanding focusing, and the laser pick-off module is located at avalanche diode front end and is used for pulse laser
Diode is launched reflected signal of the laser after measured target reflects and is focused and optically filtering.
Further, the Laser emission module includes the laser beam expanding lens positioned at pulsed laser diode Laser emission end
Piece and the laser gathering eyeglass positioned at the laser beam expanding eyeglass rear end, the laser of the pulsed laser diode transmitting pass through laser
Expand after being formed after eyeglass is expanded and being focused into the round dot hot spot of a 6mm size through laser gathering eyeglass again after certain dispersion angle
Get to measured target.
Further, the laser pick-off module includes the narrow band pass filter for being located at avalanche diode front end and narrow positioned at this
Reception gathering eyeglass with optical filter front end, it is anti-after measured target reflects that the pulsed laser diode launches laser
Penetrate signal and be transmitted through avalanche diode after narrow band pass filter optical filtering again after receiving gathering eyeglass and focusing on.
Further, the time difference measurement unit produces 160khz, 30ns narrow pulse signal and with difference modes that this is narrow
Pulse signal is inputted to high-speed driving circuit；The operation frequency of 32 arm processors is 100Mhz, and reads and control
From time difference data union processing inside FPGA.
Further, the high-speed driving circuit exports Vpp and is less than for 10V, rising time less than 8ns, phase jitter
10ps, pulse width are used to drive the pulsed laser diode to launch laser for 30ns burst pulse to pulsed laser diode.
Further, the current signal on pulsed laser diode is carried out high speed amplification by the high speed amplification and rectification circuit
It is shaped to Transistor-Transistor Logic level and inputs high-precision delay line again, the burst pulse of the Transistor-Transistor Logic level and input pulse laser diode is believed
Number synchronization.
Further, the transmission bandwidth of the preposition I/V circuits is 622Mbps, and can be by the current signal of nA ranks
It is converted into the voltage signal of mV ranks.
Further, the gain bandwidth of the efficient gain amplifying circuit is 200M.
Further, the circuit for producing high voltage output low ripple, its programmable output voltage range is 100V-200V,
Its driving current is 1mA.
Further, the pulsed laser diode launches laser for 905nm near infrared lights, and average optical power is low
In 8Mw；The narrow band pass filter is 905nm narrow band pass filters.
Compared with prior art, the invention has the advantages that：
(1) present invention has high-speed driving feature.A pair of differential signals are produced in transmitting input using high speed FPGA to make
Signal is produced for burst pulse, the self-oscillation interference of high speed circuit has been effectively eliminated, it, which is modulated, produces frequency up to 160Khz,
Narrow pulse signal is up to 30ns, ultralow phase frequency shake；32 arm processor internal data operation frequencies are up to 100Mhz,
Read and control is handled from time difference data union inside FPGA, and internal SPI/I2When C interface is outwards quickly exported
Difference measurements signal, High voltage output is accurately controlled using its ADC/DAC being internally integrated.
(2) present invention has the characteristics of transmitting laser peak power is adjustable.Radiating circuit power is according to the burst pulse of input
Width adjusts power output, according to needed for environment, can automatically adjust transmitting narrow pulse width, thus solve well it is long away from
From the resolution ratio with short distance ranging.
(3) present invention has the characteristics of Signal-to-Noise is high.Receiving circuit is inputted using independent electric current, and differential voltage is defeated
Go out, enhance the antijamming capability of signal, avalanche diode is possessed good current gain, the LVDS letters after gain is amplified
FPGA LVDS units number are directly entered, this causes echo-signal stronger, and beat signal signal to noise ratio is higher, easily recognizes and adopts
Collection.
(4) present invention has cost low, circuit reduction, the characteristics of confidentiality is high, and traditional TOF rangings need to launch electricity
Road, receiving circuit, time difference measurement circuit and digital control circuit, so the circuit system cost is high, debugging is complicated, institute of the present invention
There is time difference signal to be completed by the high speed FPGA of logic control circuit, and rising using high speed FPGA collection radiating circuit circuits
Beginning signal, LVDS units then gather the differential signal from receiving terminal, and LVDS units then gather the differential signal from receiving terminal,
Receive signal and STOP signals are exported after LVDS units, time difference measurement circuit of the prior art is integrally saved, save
While cost, circuit structure is also simplify, makes debugging simpler.
(5) present invention has the characteristics of range accuracy is fast at high speed, and high speed FPGA output burst pulses, its phase jitter is less than
10ps, differential mode, which is exported, causes signal more to stablize, speed faster, using unique delay-line inside high speed FPGA,
Time difference delay line is done, and utilizes multi-cycle measurement technology, 400M clock frequency can be obtained by the measurement accuracy of Centimeter Level,
Fireballing feature can also be taken into account simultaneously.
(6) the characteristics of present invention output laser has eye-safe.Launch light source and use 905nm near infrared lights, average light
Learn power and be less than 8Mw, meet grade CLASS I.
Brief description of the drawings
Fig. 1 is schematic diagram of structure of the present invention.
Wherein, reference is corresponding entitled：
1- logic control circuits, 2- laser transmission circuits, 3- laser pick-ofves circuit, 4- optical modules, 5- high speed FPGA cores
Piece, 6-32 an arm processor, 7- peripheral circuits, 8- high-speed driving circuits, 9- pulsed laser diodes, 10- amplification shaping at a high speed
The preposition I/V circuits of circuit, 11- avalanche diodes, 12-, the efficient gain amplifying circuits of 13-, 14- circuit for producing high voltage, 15- cylinders
Shape fixed frame, 16- Laser emissions module, 17- laser pick-ofves module, 18- laser beam expandings eyeglass, 19- laser gathering eyeglass,
20- receives the high-precision delay line of gathering eyeglass, 21- narrow band pass filters, 22- time difference measurements unit, 23-LVDS control units, 24-
Unit, 25-DAC/ADC units, 26-SPI/I2C interface.
Embodiment
The invention will be further described with embodiment for explanation below in conjunction with the accompanying drawings, and mode of the invention includes but not only limited
In following examples.
Embodiment
As shown in figure 1, the accurate range-measurement system of a kind of ultrahigh speed that the present invention is provided, circuit reduction low with cost, secrecy
The characteristics of property is high, traditional TOF rangings need radiating circuit, receiving circuit, time difference measurement circuit and digital control circuit, so
The circuit system cost is high, and debugging is complicated, and all time difference signals of the invention are completed by the high speed FPGA of logic control circuit, and
The initial signal of radiating circuit circuit is gathered using high speed FPGA, LVDS units then gather the differential signal from receiving terminal,
LVDS units then gather the differential signal from receiving terminal, receive signal and STOP signals are exported after LVDS units, will be existing
Time difference measurement circuit in technology is integrally saved, and while having saved cost, be also simplify circuit structure, is made debugging simpler
It is single.
The accurate range-measurement system of this ultrahigh speed include logic control circuit 1, laser transmission circuit 2, laser pick-off circuit 3, with
And optical module 4；
The logic control circuit 1 includes main completion logic control and inside is embedded with 32 arm processors 6 and the time difference
The high speed fpga chip 5 of measuring unit 11 and the peripheral circuit 7 being connected with the high speed fpga chip 5, the time difference measurement
Unit 22 is mainly for generation of difference narrow pulse signal and is integrated with LVDS control units 23 and high-precision delay line 24, institute
State 32 arm processors 6 to be mainly used in reading and control the time difference signal inside FPGA and carry out high-speed data computing, institute
State in 32 arm processors 6 and be integrated with DAC/ADC units 25 and SPI/I2C interface 26；
The laser transmission circuit 2 includes producing the height that difference narrow pulse signal output end is connected with high speed fpga chip 5
Fast drive circuit 8, the pulsed laser diode 9 being connected with the output end of the high-speed driving circuit 8 and amplification shaping at a high speed
Circuit 10, the pulsed laser diode 9 is connected by high speed amplification and rectification circuit 10 with high-precision delay line 24；
The preposition I/ that the laser pick-off circuit 3 includes avalanche diode 11, is connected with the N poles of the avalanche diode 11
V circuits 12, the signal for being connected and being exported to the preposition I/V circuits 12 with the output end of preposition I/V circuits 12 carry out differential amplification
Efficient gain amplifying circuit 13 and the circuit for producing high voltage 14 that is connected with the trigger electrode of the avalanche diode 11, it is described
Efficient output difference LVDS signals of gain amplifying circuit 13 and its output end is connected with LVDS control units 23, the high pressure generation
Circuit 14 is made up of dc/dc circuits while its control port is connected with DAC/ADC units 25；
The optical module 4 includes cylindrical fixed frame 15, the Laser emission in cylindrical fixed frame 15
It is used in combination at module 16 and laser pick-off module 17, the Laser emission end that the Laser emission module 16 is located at pulsed laser diode 9
Carry out expanding focusing in the laser for launching pulsed laser diode 9, the laser pick-off module 17 is located at avalanche diode 11
Front end is simultaneously focused and light for pulsed laser diode 9 to be launched into reflected signal of the laser after measured target reflects
Learn and filter.
The present invention has the characteristics of transmitting laser peak power is adjustable, and radiating circuit power is according to the narrow pulse width of input
To adjust power output, according to needed for environment, transmitting narrow pulse width can be automatically adjusted, thus solve well over long distances and
The resolution ratio of short distance ranging.
The present invention has the characteristics of Signal-to-Noise is high, and receiving circuit is inputted using independent electric current, and differential voltage output increases
The strong antijamming capability of signal, makes avalanche diode (APD) possess good current gain, the LVDS letters after gain is amplified
FPGA LVDS units number are directly entered, this causes echo-signal stronger, and beat signal signal to noise ratio is higher, easily recognizes and adopts
Collection.
The Laser emission module 16 includes the He of laser beam expanding eyeglass 18 positioned at the Laser emission end of pulsed laser diode 9
Laser gathering eyeglass 19 positioned at the rear end of laser beam expanding eyeglass 18, the laser that the pulsed laser diode 9 is launched is through too drastic
Light expands the round dot for being formed after eyeglass 18 is expanded and being focused into a 6mm size after certain dispersion angle through laser gathering eyeglass 19 again
Measured target is got to after hot spot.
The laser pick-off module 17 includes the narrow band pass filter 21 and position positioned at avalanche diode (APD) 11P poles front end
Reception gathering eyeglass 20 in the front end of narrow band pass filter 21, the pulsed laser diode 9 launches laser by tested mesh
Reflected signal after mark reflection is transmitted through after the narrow band pass filter 21 optical filtering again after receiving gathering eyeglass 20 and focusing on
Avalanche diode (APD) 11.
The time difference measurement unit 22 produces 160khz, 30ns narrow pulse signal and with difference modes by the narrow pulse signal
Input to high-speed driving circuit 8；The operation frequency of 32 arm processors 6 be 100Mhz, and read and control come from
Time difference data union processing inside FPGA.
The present invention has high-speed driving feature.A pair of differential signals are produced as narrow using high speed FPGA in transmitting input
Pulses generation signal, has effectively eliminated the self-oscillation interference of high speed circuit, and it, which is modulated, produces frequency up to 160Khz, narrow arteries and veins
Signal is rushed up to 30ns, ultralow phase frequency shake；32 arm processor internal data operation frequencies are up to 100Mhz, read
100Mbps, and internal SPI/I are up to the processing speed of time difference signal of the control inside FPGA2C interface is to extra income
Speed output time difference measurement signal, High voltage output is accurately controlled using its ADC/DAC being internally integrated.
The output Vpp of high-speed driving circuit 8 is 10V, rising time is less than 10ps, pulse less than 8ns, phase jitter
Width is used to drive the pulsed laser diode 9 to launch laser for 30ns burst pulse to pulsed laser diode 9.
The present invention has the characteristics of range accuracy is fast at high speed, and high speed FPGA output burst pulses, its phase jitter is less than
10ps, differential mode, which is exported, causes signal more to stablize, speed faster, using unique delay-line inside high speed FPGA,
Time difference delay line is done, and utilizes multi-cycle measurement technology, 400M clock frequency can be obtained by the measurement accuracy of Centimeter Level,
Fireballing feature can also be taken into account simultaneously.
Current signal on pulsed laser diode 9 is carried out amplification at a high speed and is shaped to by the high speed amplification and rectification circuit 10
Transistor-Transistor Logic level inputs high-precision delay line 24, the narrow pulse signal of the Transistor-Transistor Logic level and input pulse laser diode 9 again
It is synchronous.
The transmission bandwidth of the preposition I/V circuits 12 is 622Mbps, and the current signal of nA ranks can be converted into mV
The voltage signal of rank；The gain bandwidth of the efficient gain amplifying circuit 13 is 200M；The circuit for producing high voltage 14 is exported
Low ripple, its programmable output voltage range is 100V-200V, and its driving current is 1mA.
The pulsed laser diode 9 launches laser for 905nm near infrared lights, and average optical power is less than 8Mw；Institute
Narrow band pass filter 21 is stated for 905nm narrow band pass filters.
The characteristics of present invention output laser has eye-safe, transmitting light source uses 905nm near infrared lights, average optical work(
Rate is less than 8Mw, meets grade CLASS I.
The present invention is improved by coming and going multiple cumulative times in cycle averagings between rangefinder and target to pulse laser
The method of range accuracy.If the frequency of counting clock pulse is F, distance of the rangefinder away from target is S, and N number of week is passed through in light pulse
The total distance walked after phase and be L,
Then
In formula, m：Total crystal oscillator pulse number that counter is counted in N number of cycle；Take m=1 obtain δ it is many=c/2NfT, that is, survey
N times is improved away from precision；If N=20, fT=400MHz, C=3 × 108m/s, then as m=1, obtain δ it is many=0.01875 meter,
Therefore range accuracy is greatly improved.
FPGA completes one-shot measurement with procedure below in the present invention：Send-receive-constant time lag-launches-receives again again-
It is delayed again, FPGA first produces first pulse input and started counting up to high-speed driving circuit, and internal calculator, when receiving
After echo, echo, which reaches FPGA, allows it by the fixed delay line inside FPGA, and time delay is t, then thus echo produces the
Two pulses are simultaneously input to high-speed driving circuit, and can easily adjust with FPGA the width of pulse；More than repeating
Process, stops counting, now the value of calculator is exactly the counting of n times measurement, according to public affairs after producing N number of pulse and receiving echo
Formula can calculate the distance of measurement；
Then
M in formula0For the count value for the t inside counting devices that are delayed, and m0=t*fT.
It is existing mature technology that 32 arm processors 6, which are embedded in high speed fpga chip 5, in the present invention.Present invention tool
There is driving high speed, transmitting laser peak power is adjustable, Signal-to-Noise is high, cost is low, circuit reduction, confidentiality are high, ranging essence
The characteristics of degree is fast at high speed and exports laser eye safety, possesses prominent substantive distinguishing features and significant progressive, suitable for wide
General popularization and application.
Above-described embodiment is only one of the preferred embodiment of the present invention, should not be taken to limit the protection model of the present invention
Enclose, as long as the present invention body design thought and mentally make have no the change of essential meaning or polishing, it is solved
Technical problem it is still consistent with the present invention, should be included in protection scope of the present invention within.
Claims (10)
1. a kind of accurate range-measurement system of ultrahigh speed, it is characterised in that：Including logic control circuit (1), laser transmission circuit (2),
Laser pick-off circuit (3) and optical module (4)；
The logic control circuit (1) includes main completion logic control and inside is embedded with 32 arm processors (6) and the time difference
The high speed fpga chip (5) of measuring unit (22) and the peripheral circuit (7) being connected with the high speed fpga chip (5), it is described
Time difference measurement unit (22) mainly for generation of difference narrow pulse signal and be integrated with LVDS control units (23) and high accuracy prolong
Slow line unit (24), 32 arm processors (6) are mainly used in reading and control the time difference signal inside FPGA to go forward side by side
DAC/ADC units (25) and SPI/I are integrated with row high-speed data computing, 32 arm processors (6)2C interface (26)；
The laser transmission circuit (2) includes producing the height that difference narrow pulse signal output end is connected with high speed fpga chip (5)
Fast drive circuit (8), the pulsed laser diode (9) being connected with the output end of the high-speed driving circuit (8) and high speed are put
Big shaping circuit (10), the pulsed laser diode (9) passes through high speed amplification and rectification circuit (10) and high-precision delay line list
First (24) connection；
The laser pick-off circuit (3) include avalanche diode (11), be connected with the A poles of the avalanche diode (11) it is preposition
I/V circuits (12), the signal for being connected and being exported to the preposition I/V circuits (12) with the output end of preposition I/V circuits (12) are carried out
The efficient gain amplifying circuit (13) of differential amplification and the high pressure being connected with the trigger electrode of the avalanche diode (11) are produced
Circuit (14), efficient gain amplifying circuit (13) the output difference LVDS signals and its output end and LVDS control units (23)
Connection, the circuit for producing high voltage (14) is made up of DC/DC circuits and its control port is connected with DAC/ADC units (25)；
The optical module (4) includes cylindrical fixed frame (15), the laser hair in cylindrical fixed frame (15)
Module (16) and laser pick-off module (17) are penetrated, the Laser emission module (16) is located at the laser of pulsed laser diode (9)
Transmitting terminal simultaneously expands focusing, laser pick-off module (17) position for the laser progress for launching pulsed laser diode (9)
In avalanche diode (11) front end and anti-after measured target reflects for pulsed laser diode (9) to be launched into laser
Signal is penetrated to be focused and optically filtering.
2. the accurate range-measurement system of a kind of ultrahigh speed according to claim 1, it is characterised in that：The Laser emission module
(16) include positioned at the laser beam expanding eyeglass (18) at pulsed laser diode (9) Laser emission end and positioned at the laser beam expanding eyeglass
(18) the laser gathering eyeglass (19) of rear end, the laser of pulsed laser diode (9) transmitting passes through laser beam expanding eyeglass
(18) formed after expanding after being focused into the round dot hot spot of a 6mm size through laser gathering eyeglass (19) again after certain dispersion angle
Get to measured target.
3. the accurate range-measurement system of a kind of ultrahigh speed according to claim 2, it is characterised in that：The laser pick-off module
(17) narrow band pass filter (21) positioned at avalanche diode (11) front end and connecing positioned at narrow band pass filter (21) front end are included
Gathering eyeglass (20) is received, the pulsed laser diode (9) launches reflected signal warp of the laser after measured target reflects
Cross after reception gathering eyeglass (20) is focused on and be transmitted through avalanche diode (11) after the narrow band pass filter (21) optical filtering again.
4. the accurate range-measurement system of a kind of ultrahigh speed according to claim 3, it is characterised in that：The time difference measurement unit
(22) 160khz, 30ns narrow pulse signal are produced and is inputted the narrow pulse signal to high-speed driving circuit (8) with difference modes；
The operation frequency of 32 arm processors (6) is 100Mhz, and reads and control from time difference data inside FPGA and transport
Calculation is handled.
5. the accurate range-measurement system of a kind of ultrahigh speed according to claim 4, it is characterised in that：The high-speed driving circuit
(8) output Vpp is 10V, rising time less than the burst pulse that 8ns, phase jitter are less than 10ps, pulse width is 30ns to arteries and veins
Impulse optical diode (9) is used to drive the pulsed laser diode (9) to launch laser.
6. the accurate range-measurement system of a kind of ultrahigh speed according to claim 5, it is characterised in that：The high speed amplification shaping electricity
Current signal progress high speed amplification on pulsed laser diode (9) is shaped to Transistor-Transistor Logic level and inputs high-precision prolong again by road (10)
Slow line unit (24), the Transistor-Transistor Logic level is synchronous with the narrow pulse signal of input pulse laser diode (9).
7. the accurate range-measurement system of a kind of ultrahigh speed according to claim 6, it is characterised in that：The preposition I/V circuits
(12) transmission bandwidth is 622Mbps, and the current signal of nA ranks can be converted into the voltage signal of mV ranks.
8. the accurate range-measurement system of a kind of ultrahigh speed according to claim 7, it is characterised in that：The efficient gain amplification electricity
The gain bandwidth on road (13) is 200M.
9. the accurate range-measurement system of a kind of ultrahigh speed according to claim 8, it is characterised in that：The circuit for producing high voltage
(14) low ripple is exported, its programmable output voltage range is 100V-200V, its driving current is 1mA.
10. the accurate range-measurement system of a kind of ultrahigh speed according to claim 9, it is characterised in that：The pole of pulse laser two
Pipe (9) launches laser for 905nm near infrared lights, and average optical power is less than 8Mw；The narrow band pass filter (21) is
905nm narrow band pass filters.
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| CN201710317080.7A CN107132543B (en) | 2017-05-08 | 2017-05-08 | A kind of range-measurement system |
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| CN201710317080.7A CN107132543B (en) | 2017-05-08 | 2017-05-08 | A kind of range-measurement system |
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Cited By (5)
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| CN108008373A (en) * | 2017-11-30 | 2018-05-08 | 成都微光云科技有限公司 | A kind of echo cancellation system based on pulse type laser ranging |
| CN108614272A (en) * | 2018-04-13 | 2018-10-02 | 中山大学 | A kind of pulse type laser range-measuring circuit |
| CN109471118A (en) * | 2018-12-13 | 2019-03-15 | 上海大恒光学精密机械有限公司 | Based on the cumulative laser ranging system with waveform sampling of echo waveform |
| CN110566024A (en) * | 2019-09-27 | 2019-12-13 | 佛山科学技术学院 | Parking control device |
| CN112198518A (en) * | 2020-09-29 | 2021-01-08 | 广东博智林机器人有限公司 | Pulse laser radar and ranging method thereof |
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| CN108614272A (en) * | 2018-04-13 | 2018-10-02 | 中山大学 | A kind of pulse type laser range-measuring circuit |
| CN109471118A (en) * | 2018-12-13 | 2019-03-15 | 上海大恒光学精密机械有限公司 | Based on the cumulative laser ranging system with waveform sampling of echo waveform |
| CN110566024A (en) * | 2019-09-27 | 2019-12-13 | 佛山科学技术学院 | Parking control device |
| CN112198518A (en) * | 2020-09-29 | 2021-01-08 | 广东博智林机器人有限公司 | Pulse laser radar and ranging method thereof |
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