CN107515388A - A kind of laser signal process chip and laser radar system - Google Patents
A kind of laser signal process chip and laser radar system Download PDFInfo
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- CN107515388A CN107515388A CN201710932547.9A CN201710932547A CN107515388A CN 107515388 A CN107515388 A CN 107515388A CN 201710932547 A CN201710932547 A CN 201710932547A CN 107515388 A CN107515388 A CN 107515388A
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- 230000008569 process Effects 0.000 title claims abstract description 28
- 238000012545 processing Methods 0.000 claims description 17
- 230000003321 amplification Effects 0.000 claims description 8
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 8
- 238000005070 sampling Methods 0.000 claims description 8
- 230000005611 electricity Effects 0.000 claims description 3
- 238000001514 detection method Methods 0.000 description 6
- 238000001914 filtration Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
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- 238000010168 coupling process Methods 0.000 description 2
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- 230000008054 signal transmission Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
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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
- G01S7/483—Details of pulse systems
- G01S7/486—Receivers
-
- 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
-
- 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
- G01S7/4861—Circuits for detection, sampling, integration or read-out
-
- 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
- G01S7/491—Details of non-pulse systems
- G01S7/4912—Receivers
-
- 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
- G01S7/491—Details of non-pulse systems
- G01S7/4912—Receivers
- G01S7/4913—Circuits for detection, sampling, integration or read-out
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Electromagnetism (AREA)
- Optical Radar Systems And Details Thereof (AREA)
Abstract
The invention provides a kind of laser signal process chip and laser radar system, the chip includes：Including：Bandpass filter, trans-impedance amplifier, signal sample circuit and moment discrimination circuit, bandpass filter, for being filtered according to setpoint frequency to the echo current signal received, filtered current signal is obtained, filtered current signal is transferred to the trans-impedance amplifier；Wherein, echo current signal is that the laser signal that the optical-electrical converter in laser radar system is reflected the examined object received carries out changing generation；Trans-impedance amplifier, for the filtered current signal received to be converted into echo voltage signal, echo voltage signal is transferred to signal sample circuit and moment discrimination circuit respectively；Signal sample circuit, for being sampled to the echo voltage signal received, obtain half-tone information；The moment discrimination circuit, for handling respectively the echo voltage signal received, obtain the reception time of laser signal.
Description
Technical field
The present invention relates to microelectronics technology, more particularly to a kind of laser signal process chip and laser radar system.
Background technology
In conventional laser radar system, laser pick-off front end is typically made up of discrete multiple chips, each chip point
The other laser signal to receiving carries out such as signal filtering, the multistage amplification of signal, moment discriminating, peak value sampling etc. respectively
Reason, is the key part in laser radar system, the performance of direct relation radar total system.
Because the chip in existing laser radar system includes numerous functional modules, and laser radar echo pickup electrode
Its is faint, so easily being produced influence of noise signal quality by the crosstalk of other signals.The design on board level of discrete device simultaneously,
Cause system complexity rise, stability is poor, power consumption is high, significantly limit the lasting lifting of radar system overall performance, institute
Just it is particularly important with the chip design of laser radar system receiving front-end.
The content of the invention
In view of this, it is an object of the invention to provide a kind of laser signal process chip and laser radar system, it is used for
Solves the problems such as reducing the detection performance of laser radar system due to multiple chip cascades in the prior art.
In a first aspect, the embodiment of the present invention provides a kind of laser signal process chip, applied in laser radar system, it is somebody's turn to do
Chip includes：Bandpass filter, trans-impedance amplifier, signal sample circuit and moment discrimination circuit, wherein, the bandpass filter
Electrically connected with the trans-impedance amplifier, the trans-impedance amplifier also differentiates electricity with the signal sample circuit, the moment respectively
Road electrically connects；
The bandpass filter, for being filtered according to setpoint frequency to the echo current signal received, filtered
Signal wave current, the filtered current signal is transferred to the trans-impedance amplifier；Wherein, the echo current signal is laser
The laser signal that optical-electrical converter in radar system is reflected the examined object received carries out changing generation；
The trans-impedance amplifier, for the filtered current signal received to be converted into echo voltage signal, by institute
State echo voltage signal and be transferred to the signal sample circuit and the moment discrimination circuit respectively；
The signal sample circuit, for being sampled to the echo voltage signal received, half-tone information is obtained,
And transmit, the half-tone information characterizes the intensity of the laser signal；
The moment discrimination circuit, for carrying out delay process and decay to the echo voltage signal received respectively
Processing, the echo voltage signal after delay and the echo voltage signal after decay are compared, obtain the laser signal
The time is received, and transmits the reception time.
Alternatively, in addition to：Voltage amplifier, the voltage amplifier respectively with the trans-impedance amplifier, the signal
Sample circuit, moment discrimination circuit electrical connection；
The voltage amplifier, for carrying out the magnitude of voltage of the echo voltage signal received according to setting multiplication factor
Amplification, the signal sample circuit and the moment discrimination circuit are transferred to by the echo voltage signal after amplification.
Alternatively, the signal sample circuit includes：Analog-digital converter, the analog-digital converter, for by after sampling
Echo voltage signal is converted to data signal by analog signal, obtains half-tone information.
Alternatively, the signal sample circuit is specifically used for adopting the echo voltage signal according to following steps
Sample：
The voltage peak of the echo voltage signal in the collection setting cycle.
Alternatively, the moment discrimination circuit includes：Delay circuit, attenuator circuit and comparator, the comparator difference
Electrically connected with the delay circuit, the attenuator circuit；
The delay circuit, for carrying out delay process to the echo voltage signal received, by returning after delay
Wave voltage signal is transferred to the comparator；
The attenuator circuit, the voltage peak for the echo voltage signal to receiving carry out attenuation processing, obtained
Echo voltage signal after to decay, the echo voltage signal after decay is transferred to the comparator；
The comparator, for according to the echo voltage signal after the delay received and the echo after the decay
Voltage signal, determine the reception time of the laser signal.
Alternatively, the comparator is specifically used for the reception time that the laser signal is determined according to following steps：
Determine echo voltage signal after the delay figure and the decay after echo voltage signal figure
Intersection point, be defined as to the reception time of the laser signal time corresponding to the intersection point.
Alternatively, the comparator includes high-speed comparator.
Alternatively, the echo current signal is analog signal.
Second aspect, the embodiment of the present invention provide a kind of laser radar system, including laser signal process chip as above.
The embodiments of the invention provide a kind of laser signal process chip, including：Bandpass filter, trans-impedance amplifier, letter
Number sample circuit and moment discrimination circuit, wherein, the bandpass filter electrically connects with the trans-impedance amplifier, described to be put across resistance
Big device also electrically connects with the signal sample circuit, the moment discrimination circuit respectively；The bandpass filter, for according to setting
Determine frequency to be filtered the echo current signal received, obtain filtered current signal, the filtered current signal is transmitted
To the trans-impedance amplifier；Wherein, the echo current signal is optical-electrical converter in laser radar system to receiving
The laser signal of examined object reflection carries out changing generation；The trans-impedance amplifier, for the filtering that will be received
Current signal is converted to echo voltage signal, and the echo voltage signal is transferred into the signal sample circuit and described respectively
Moment discrimination circuit；The signal sample circuit, for being sampled to the echo voltage signal received, obtain gray scale
Information, and transmit, the half-tone information characterizes the intensity of the laser signal；The moment discrimination circuit, for docking respectively
The echo voltage signal received carries out delay process and attenuation processing, after the echo voltage signal after delay and decay
Echo voltage signal is compared, and obtains the reception time of the laser signal, and transmits the reception time.The present invention is implemented
Example provide laser signal process chip, with it is existing by different chips to laser signal carry out treatment technology compared with, should
Filtering process of the laser signal process chip with the laser signal to receiving, enhanced processing, sampling processing, confirmation laser letter
Number the function such as time of reception, greatly reduce using the cascade ghost effect between multiple chips during the processing of multiple chips, subtract
Lack the delay of signal transmission, meanwhile, effectively reduce the complexity of the laser radar system using the laser signal processing unit
Degree, improve the performance and stability of laser radar system.
To enable the above objects, features and advantages of the present invention to become apparent, preferred embodiment cited below particularly, and coordinate
Appended accompanying drawing, is described in detail below.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below by embodiment it is required use it is attached
Figure is briefly described, it will be appreciated that the following drawings illustrate only certain embodiments of the present invention, therefore be not construed as pair
The restriction of scope, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to this
A little accompanying drawings obtain other related accompanying drawings.
Fig. 1 shows a kind of the first structural representation for laser signal process chip that the embodiment of the present invention is provided；
Fig. 2 shows a kind of second of structural representation of laser signal process chip that the embodiment of the present invention is provided；
Fig. 3 shows a kind of structural scheme of mechanism for moment discrimination circuit that the embodiment of the present invention is provided；
Fig. 4 shows the oscillogram of the reception time for confirmation laser signal that the embodiment of the present invention is provided a kind of.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
Middle accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only
It is part of the embodiment of the present invention, rather than whole embodiments.The present invention being generally described and illustrated herein in the accompanying drawings is real
Applying the component of example can be configured to arrange and design with a variety of.Therefore, it is of the invention to what is provided in the accompanying drawings below
The detailed description of embodiment is not intended to limit the scope of claimed invention, but is merely representative of the selected reality of the present invention
Apply example.Based on embodiments of the invention, institute that those skilled in the art are obtained on the premise of creative work is not made
There is other embodiment, belong to the scope of protection of the invention.
The embodiment of the present invention provides a kind of laser signal process chip, applied in laser radar system, as shown in figure 1,
Including：Bandpass filter 12, trans-impedance amplifier 13, signal sample circuit 14 and moment discrimination circuit 15, wherein, the band logical filter
Ripple device 12 also electrically connects with the trans-impedance amplifier 13, the trans-impedance amplifier 13 also respectively with the signal sample circuit 14,
The moment discrimination circuit 15 electrically connects；Wherein, the echo current signal is the optical-electrical converter pair in laser radar system
The laser signal of the examined object reflection received carries out changing generation；
The bandpass filter 12, for being filtered according to setpoint frequency to the echo current signal received,
Filtered current signal is obtained, the filtered current signal is transferred to the trans-impedance amplifier 13；
The trans-impedance amplifier 13, will for the filtered current signal received to be converted into echo voltage signal
The echo voltage signal is transferred to the signal sample circuit 14 and the moment discrimination circuit 15 respectively；
The signal sample circuit 14, for being sampled to the echo voltage signal received, obtain gray scale letter
Breath, and transmit, the half-tone information characterizes the intensity of the laser signal；
The moment discrimination circuit 15, for carrying out delay process to the echo voltage signal received respectively and declining
Subtract processing, the echo voltage signal after delay and the echo voltage signal after decay are compared, obtain the laser signal
The reception time, and transmit the reception time.
Specifically, the laser that the optical-electrical converter in laser radar system can reflect the examined object received is believed
Number current signal is converted to, the current signal is defined as echo current signal；Bandpass filter 12 can only receive laser signal
The laser signal of middle special frequency channel, the signal for being not belonging to the special frequency channel cannot be introduced into bandpass filter, reduce other signals
Interference to laser signal so that the intensity of the laser signal received is stronger, and conventional bandpass filter can have Kiel
Bert wave filter etc..
The operation principle of trans-impedance amplifier 13 is：To the feedback resistance (R at operational amplifier (op amp) both endsF) use Europe
Nurse law VOUT=I × RF, realize and current signal (I) be converted into voltage (VOUT) signal.Wherein, echo current signal, filtering
Current signal, echo voltage signal are analog signal.
Further, the signal sample circuit 14 is specifically used for carrying out the echo voltage signal according to following steps
Sampling：
The voltage peak of the echo voltage signal in the collection setting cycle.
Specifically, because examined object is according to setting cycle return laser light signal, the setting cycle is typically and Laser emission
The cycle of the laser signal of device transmitting is consistent, and signal sample circuit 14 gathers the echo voltage letter for receiving each cycle successively
Number.When being sampled in the present invention, the waveform of echo voltage signal is similar to Gaussian pulse, typically gathers in the setting cycle
The voltage peak of echo voltage signal, i.e., magnitude of voltage corresponding to the peak of echo voltage signal.
Further, as shown in Fig. 2 signal sample circuit 14 also includes analog-digital converter 141, the analog-digital converter
141, for the echo voltage signal after sampling to be converted into data signal by analog signal, obtain half-tone information.Wherein, gray scale
Information is generally data signal, and half-tone information characterizes the intensity of laser signal.
The i.e. A/D converter, or abbreviation ADC of analog-digital converter 141, typically refer to one and believe analog-signal transitions for numeral
Number electronic device.
Signal sample circuit 14 also includes peak detection circuit (not shown), peak detection circuit and analog-digital converter 141
Electrical connection, peak detection circuit is used for the voltage peak for detecting the echo voltage signal, true based on the voltage peak detected
Echo voltage signal after fixed sampling.
Laser signal process chip provided in an embodiment of the present invention, laser signal is entered by different chips from existing
Row treatment technology is compared, and filtering process of the laser signal process chip with the laser signal to receiving, enhanced processing, is adopted
The functions such as sample processing, the time of reception for confirming laser signal, greatly reduce using between multiple chips during the processing of multiple chips
Cascade ghost effect, reduce signal transmission delay, meanwhile, effectively reduce using the laser signal processing unit swash
The complexity of optical detection and ranging system, improve the performance and stability of laser radar system.
Another embodiment of the present invention provides a kind of laser signal process chip, as shown in Fig. 2 the laser signal handles core
Compared with the laser signal process chip that Fig. 1 is provided, the chip also includes piece：Voltage amplifier 16, the voltage amplifier 16
Electrically connected respectively with the trans-impedance amplifier 13, the signal sample circuit 14, the moment discrimination circuit 15；
The voltage amplifier 16, for entering the magnitude of voltage of the echo voltage signal received according to setting multiplication factor
Row amplification, the signal sample circuit 14 and the moment discrimination circuit 15 are transferred to by the echo voltage signal after amplification.
Specifically, voltage amplifier 16 (Voltage Amplifier) is the voltage for the voltage signal to receiving
The device that value is amplified.Conventional multistage amplification, cascade system divide direct-coupling, resistance-capacitance coupling and transformer coupled etc., amplification
The frequency response of voltage signal afterwards is flat, distortion is small, while also increases the laser thunder using the laser signal processing unit
Up to the long-range detection ability of system.
Further, with reference to figure 3, the moment discrimination circuit 15 in the device includes：Delay circuit 151, decay electricity
Road 152 and comparator 153, the comparator 153 electrically connect with the delay circuit 151, the attenuator circuit 152 respectively；
The delay circuit 151, for carrying out delay process to the echo voltage signal received, after delay
Echo voltage signal is transferred to the comparator 153；
Specifically, delay circuit 151 is used for the time that delayed echo voltage signal reaches comparator 153.
The attenuator circuit 152, the voltage peak for the echo voltage signal to receiving carry out attenuation processing,
Echo voltage signal after being decayed, the echo voltage signal after decay is transferred to the comparator 153；
Specifically, attenuator circuit 152 is carrying out attenuation processing to receiving echo voltage signal, specifically, reducing echo
The peak value of voltage signal, the detailed introduction of prior art, is no longer excessively illustrated herein.
The comparator 153, after according to the echo voltage signal after the delay received and the decay
Echo voltage signal, determine the reception time of the laser signal.
Further, the comparator 153 is specifically used for the reception time that the laser signal is determined according to following steps：
Determine echo voltage signal after the delay figure and the decay after echo voltage signal figure
Intersection point, be defined as to the reception time of the laser signal time corresponding to the intersection point.
Alternatively, the comparator includes high-speed comparator, voltage comparator etc., and e.g., common voltage comparator has
LM339, LM393 etc.；The present invention is not limited this, the echo voltage after the figure of the echo voltage signal after delay and decay
The figure of signal is generally curvilinear figure.
Specifically, it is the figure of the echo voltage signal after the delay received in comparator with reference to figure 4, a, b is comparator
In echo voltage signal after the decay that receives figure, q be the echo voltage signal after delay figure and decay after
The intersection point of the figure of the waveform of echo voltage signal, time corresponding to q points are the time for receiving laser signal, i.e., thing to be detected
The reception time of the laser signal of body reflection.So, the influence for error of being moved about caused by echo strength changes is reduced, is made
The reception time for the laser signal that must be determined is more accurate.
Wherein, the reception time can be sent to the processor in laser radar system, signal sampling by moment discrimination circuit 15
Obtained half-tone information can be also transmitted to the processor in laser radar system by circuit 14, by laser radar system according to reception
To above-mentioned reception time and half-tone information, determine examined object such as movable information.
Embodiments of the invention additionally provide a kind of laser radar system, including laser signal process chip as above.
It should be noted that：Similar label and letter represents similar terms in following accompanying drawing, therefore, once a certain Xiang Yi
It is defined, then it further need not be defined and explained in subsequent accompanying drawing in individual accompanying drawing.
In the description of the invention, it is necessary to explanation, term " " center ", " on ", " under ", "left", "right", " vertical ",
The orientation or position relationship of the instruction such as " level ", " interior ", " outer " be based on orientation shown in the drawings or position relationship, or should
Invention product using when the orientation usually put or position relationship, be for only for ease of the description present invention and simplify description, without
It is instruction or implies that signified device or element there must be specific orientation, with specific azimuth configuration and operation, therefore not
It is understood that as limitation of the present invention.In addition, term " first ", " second ", " the 3rd " etc. are only used for distinguishing description, and can not manage
Solve to indicate or implying relative importance.
In the description of the invention, it is also necessary to explanation, unless otherwise clearly defined and limited, term " setting ",
" installation ", " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or one
Connect body；Can be mechanical connection or electrical connection；Can be joined directly together, can also be indirect by intermediary
It is connected, can is the connection of two element internals.For the ordinary skill in the art, on being understood with concrete condition
State the concrete meaning of term in the present invention.
Finally it should be noted that：Embodiment described above, it is only the embodiment of the present invention, to illustrate the present invention
Technical scheme, rather than its limitations, protection scope of the present invention is not limited thereto, although with reference to the foregoing embodiments to this hair
It is bright to be described in detail, it will be understood by those within the art that：Any one skilled in the art
The invention discloses technical scope in, it can still modify to the technical scheme described in previous embodiment or can be light
Change is readily conceivable that, or equivalent substitution is carried out to which part technical characteristic；And these modifications, change or replacement, do not make
The essence of appropriate technical solution departs from the spirit and scope of technical scheme of the embodiment of the present invention.The protection in the present invention should all be covered
Within the scope of.Therefore, protection scope of the present invention described should be defined by scope of the claims.
Claims (9)
1. a kind of laser signal process chip, applied in laser radar system, it is characterised in that the chip includes：Band logical is filtered
Ripple device, trans-impedance amplifier, signal sample circuit and moment discrimination circuit, wherein, the bandpass filter amplifies with described across resistance
Device electrically connects, and the trans-impedance amplifier also electrically connects with the signal sample circuit, the moment discrimination circuit respectively；
The bandpass filter, for being filtered according to setpoint frequency to the echo current signal received, obtain filtered electrical
Signal is flowed, the filtered current signal is transferred to the trans-impedance amplifier；Wherein, the echo current signal is laser radar
The laser signal that optical-electrical converter in system is reflected the examined object received carries out changing generation；
The trans-impedance amplifier, for the filtered current signal received to be converted into echo voltage signal, described it will return
Wave voltage signal is transferred to the signal sample circuit and the moment discrimination circuit respectively；
The signal sample circuit, for being sampled to the echo voltage signal received, half-tone information is obtained, and pass
Defeated, the half-tone information characterizes the intensity of the laser signal；
The moment discrimination circuit, for being carried out respectively to the echo voltage signal received at delay process and decay
Reason, the echo voltage signal after delay and the echo voltage signal after decay are compared, obtain connecing for the laser signal
Between time receiving, and transmit the reception time.
2. chip as claimed in claim 1, it is characterised in that also include：Voltage amplifier, the voltage amplifier respectively with
The trans-impedance amplifier, the signal sample circuit, moment discrimination circuit electrical connection；
The voltage amplifier, for being put the magnitude of voltage of the echo voltage signal received according to setting multiplication factor
Greatly, the echo voltage signal after amplification is transferred to the signal sample circuit and the moment discrimination circuit.
3. chip as claimed in claim 1, it is characterised in that the signal sample circuit includes：Analog-digital converter, the mould
Number converter, for the echo voltage signal after sampling to be converted into data signal by analog signal, obtain half-tone information.
4. chip as claimed in claim 1, it is characterised in that the signal sample circuit is specifically used for according to following steps pair
The echo voltage signal is sampled：
The voltage peak of the echo voltage signal in the collection setting cycle.
5. chip as claimed in claim 1, it is characterised in that the moment discrimination circuit includes：Delay circuit, attenuator circuit
And comparator, the comparator electrically connect with the delay circuit, the attenuator circuit respectively；
The delay circuit, for carrying out delay process to the echo voltage signal received, by the echo electricity after delay
Pressure signal is transferred to the comparator；
The attenuator circuit, the voltage peak for the echo voltage signal to receiving carry out attenuation processing, declined
Echo voltage signal after subtracting, the echo voltage signal after decay is transferred to the comparator；
The comparator, for according to the echo voltage signal after the delay received and the echo voltage after the decay
Signal, determine the reception time of the laser signal.
6. chip as claimed in claim 5, it is characterised in that the comparator is specifically used for according to determining following steps
The reception time of laser signal：
Determine the echo voltage signal after the delay figure and the decay after echo voltage signal figure intersection point,
Time corresponding to the intersection point is defined as to the reception time of the laser signal.
7. the chip as described in claim 5 or 6, it is characterised in that the comparator includes high-speed comparator.
8. chip as claimed in claim 1, it is characterised in that the echo current signal is analog signal.
9. a kind of laser radar system, it is characterised in that including the laser signal processing as any one of claim 1-8
Chip.
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| CN201710932547.9A CN107515388B (en) | 2017-10-10 | 2017-10-10 | Laser signal processing chip and laser radar system |
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| CN201710932547.9A CN107515388B (en) | 2017-10-10 | 2017-10-10 | Laser signal processing chip and laser radar system |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109245765A (en) * | 2018-06-29 | 2019-01-18 | 西安电子科技大学昆山创新研究院 | TDC_ADC multiplexing technology |
| CN109375194A (en) * | 2018-10-22 | 2019-02-22 | 天津大学 | AFE(analog front end) reading circuit for laser radar |
| CN110208775A (en) * | 2018-08-01 | 2019-09-06 | 王飞 | A kind of laser radar receives chip, laser radar chip and laser radar system |
| CN110376569A (en) * | 2019-07-25 | 2019-10-25 | 桂林理工大学 | The high-order of pulse lidar amplifies-it is fitted moment discrimination circuit |
| CN110687519A (en) * | 2019-11-12 | 2020-01-14 | 北京万集科技股份有限公司 | Laser radar signal noise reduction device and method |
| CN112782672A (en) * | 2019-11-07 | 2021-05-11 | 上海禾赛科技股份有限公司 | Laser radar receiving end assembly, fault diagnosis method thereof and laser radar |
| CN113687333A (en) * | 2020-05-16 | 2021-11-23 | 北醒（北京）光子科技有限公司 | Transmitting signal state monitoring circuit |
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