CN203422470U - Receiving circuit of laser distance measuring system - Google Patents
Receiving circuit of laser distance measuring system Download PDFInfo
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- CN203422470U CN203422470U CN201320538730.8U CN201320538730U CN203422470U CN 203422470 U CN203422470 U CN 203422470U CN 201320538730 U CN201320538730 U CN 201320538730U CN 203422470 U CN203422470 U CN 203422470U
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- distance measuring
- measuring system
- laser distance
- receiving circuit
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- 229920006395 saturated elastomer Polymers 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
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Abstract
The utility model aims to provide a receiving circuit of a laser distance measuring system, effectively solves a noise problem existing in a receiving circuit of a laser distance measuring system in the prior art and improves distance measuring precision of the laser distance measuring system. The receiving circuit of the laser distance measuring system comprises a photoelectric detector, a bias circuit, a preamplifier, a main amplifier, a comparator and a timing chip which are sequentially connected in series. The receiving circuit of the laser distance measuring system is characterized in that a high pass filter is connected in series between the bias circuit and the preamplifier. Through the reasonably-arranged filter, the receiving circuit of the laser distance measuring system can effectively solve a problem of a saturation phenomenon caused by backlight noise, can effectively inhibit noise generated in a signal processing process, improves distance measuring precision of the laser distance measuring system and has relatively good reference significance for similar signal processing.
Description
Technical field
The utility model belongs to automobile active safety technical field, is specifically related to a kind of receiving circuit of laser distance measuring system.
Background technology
One of core technology of laser distance measuring system is exactly receiving circuit, and receiving circuit is most important for the processing of signal, and the function that its signal quality has affected range finding realizes and distance accuracy.Especially for pulse type laser range measurement system, the light pulse signal reflecting through barrier is very faint, if guarantee, effectively identify this signal and realize clocking capability, receiving circuit system need be introduced filtering and amplifying circuit, but when amplifying the pulse signal of high frequency, the processing of noise is a very difficult problem.
Summary of the invention
The purpose of this utility model is the receiving circuit that proposes a kind of laser distance measuring system, the noise problem running into effectively to solve the receiving circuit of laser distance measuring system, the distance accuracy of raising laser distance measuring system.
The receiving circuit of laser distance measuring system of the present utility model comprises photodetector, biasing circuit, prime amplifier, main amplifier, comparer and the timing chip of series connection successively, and key is to be in series with Hi-pass filter between described biasing circuit and prime amplifier.
The principle of work of the receiving circuit of above-mentioned laser distance measuring system is as follows: photodetector receives laser echo pulse signal, convert light signal to electric signal, through biasing circuit, electric signal is modulated into the voltage signal that can amplify, prime amplifier be this voltage signal is overturn and be amplified to a certain degree after send to again main amplifier, main amplifier sends to comparer to carry out shaping after amplifying again, and the signal after shaping is given timing chip again.The utility model is in series with Hi-pass filter between biasing circuit and prime amplifier, can effectively solve the saturated phenomenon that background noise causes.
Further, when surround lighting luminosity is very strong, the electric weight that flows through photodetector reaches a steady state value.And amplifier chip is when enlargement factor is excessive, there will be more serious thermonoise and self-sustained oscillation phenomenon, so appearance for fear of this phenomenon, the enlargement factor of amplifier is unsuitable too high, can between amplifier output terminal, amplifier and amplifier, introduce filtering circuit simultaneously, specifically, there is following several structure:
1, described main amplifier is that a plurality of amplifiers are in series, and between described each amplifier, is in series with low-pass filter; 2, between described main amplifier and comparer, be in series with low-pass filter; 3, between described prime amplifier and main amplifier, be in series with low-pass filter.
The receiving circuit of laser distance measuring system of the present utility model is by arranging rational wave filter, can effectively solve the saturated phenomenon that background noise causes, and the noise occurring in effective Inhibitory signal processing procedure, improve the distance accuracy of laser distance measuring system, and the processing of similar signal is had to good reference.
Accompanying drawing explanation
Fig. 1 is the theory diagram of the receiving circuit of laser distance measuring system of the present utility model.
Embodiment
Contrast accompanying drawing below, by the description to embodiment, embodiment of the present utility model is described in further detail as the effect of the mutual alignment between the shape of each related member, structure, each several part and annexation, each several part and principle of work etc.
Embodiment 1:
As shown in Figure 1, the receiving circuit of the laser distance measuring system of the present embodiment comprises: photodetector 1, biasing circuit 2, prime amplifier 3, main amplifier 4, comparer 5, timing chip 6.Wherein photodetector 1 receives laser echo pulse signal, convert light signal to electric signal, through biasing circuit 2, electric signal is modulated into the voltage signal that can amplify, biasing circuit 2 is between photodetector 1 and prime amplifier 3, for the normal operation of photodetector 1 provides condition, complete the Circuit Matching with prime amplifier 3 simultaneously.Prime amplifier 2 be voltage signal is overturn and be amplified to a certain degree after send to again main amplifier 4, main amplifier 4 sends to comparer 5 to carry out shaping after amplifying again, the signal after shaping is given timing chip 6 again.For improving enlargement factor, above-mentioned main amplifier 4 is in series for a plurality of amplifiers.
The saturated phenomenon causing for solving background noise, is in series with high pass active filter 7 between described biasing circuit 2 and prime amplifier 3; And in order to solve thermonoise and self-sustained oscillation phenomenon, between prime amplifier 3 and main amplifier 4, be in series with low-pass filter 8, between each amplifier of formation main amplifier 4, be in series with low-pass filter 9, between main amplifier 4 and comparer 5, be in series with low-pass filter 10.
Claims (4)
1. the receiving circuit of a laser distance measuring system, the photodetector, biasing circuit, prime amplifier, main amplifier, comparer and the timing chip that comprise series connection successively, is characterized in that being in series with Hi-pass filter between described biasing circuit and prime amplifier.
2. the receiving circuit of laser distance measuring system according to claim 1, is characterized in that described main amplifier is that a plurality of amplifiers are in series, and is in series with low-pass filter between described each amplifier.
3. the receiving circuit of laser distance measuring system according to claim 1 and 2, is characterized in that being in series with low-pass filter between described main amplifier and comparer.
4. the receiving circuit of laser distance measuring system according to claim 3, is characterized in that being in series with low-pass filter between described prime amplifier and main amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320538730.8U CN203422470U (en) | 2013-09-02 | 2013-09-02 | Receiving circuit of laser distance measuring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320538730.8U CN203422470U (en) | 2013-09-02 | 2013-09-02 | Receiving circuit of laser distance measuring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203422470U true CN203422470U (en) | 2014-02-05 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320538730.8U Expired - Lifetime CN203422470U (en) | 2013-09-02 | 2013-09-02 | Receiving circuit of laser distance measuring system |
Country Status (1)
| Country | Link |
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| CN (1) | CN203422470U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104020460A (en) * | 2014-06-27 | 2014-09-03 | 奇瑞汽车股份有限公司 | Echo signal amplification circuit of laser ranging system |
| CN106452604A (en) * | 2016-06-21 | 2017-02-22 | 河南平原光电有限公司 | Laser receiver |
| CN108196264A (en) * | 2016-12-08 | 2018-06-22 | 北京万集科技股份有限公司 | A kind of laser distance measurement method, apparatus and system |
| WO2020107250A1 (en) * | 2018-11-28 | 2020-06-04 | 深圳市大疆创新科技有限公司 | Laser receiving circuit, distance measurement device, and mobile platform |
-
2013
- 2013-09-02 CN CN201320538730.8U patent/CN203422470U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104020460A (en) * | 2014-06-27 | 2014-09-03 | 奇瑞汽车股份有限公司 | Echo signal amplification circuit of laser ranging system |
| CN106452604A (en) * | 2016-06-21 | 2017-02-22 | 河南平原光电有限公司 | Laser receiver |
| CN108196264A (en) * | 2016-12-08 | 2018-06-22 | 北京万集科技股份有限公司 | A kind of laser distance measurement method, apparatus and system |
| CN108196264B (en) * | 2016-12-08 | 2020-06-23 | 北京万集科技股份有限公司 | Laser ranging method, device and system |
| WO2020107250A1 (en) * | 2018-11-28 | 2020-06-04 | 深圳市大疆创新科技有限公司 | Laser receiving circuit, distance measurement device, and mobile platform |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140205 |
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| CX01 | Expiry of patent term |