CN205749888U - Laser echo signal gain control for anti-collision system for automobile - Google Patents
Laser echo signal gain control for anti-collision system for automobile Download PDFInfo
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- CN205749888U CN205749888U CN201620067458.3U CN201620067458U CN205749888U CN 205749888 U CN205749888 U CN 205749888U CN 201620067458 U CN201620067458 U CN 201620067458U CN 205749888 U CN205749888 U CN 205749888U
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Abstract
The utility model discloses a kind of laser echo signal gain control for anti-collision system for automobile, it includes detection circuit, the first amplifying circuit and the second amplifying circuit being sequentially connected with；The sample circuit being connected with described first amplifying circuit；And the controller being connected with described sample circuit；Laser echo signal of the present utility model detects through described photodetector, and transmission is to the first amplifying circuit；And be amplified via operational amplifier OPA356；Signal after amplification is sampled by sample circuit, and this sampled signal is inputted controller, and described controller, according to described sampled signal, controls the gain of the second amplifying circuit, thus realizes the control of the gain to laser echo signal.The visible laser echo signal gain control for anti-collision system for automobile of the present utility model realizes the process of laser echo signal by hardware circuit, and response speed is fast；And the electronic component that used is less, therefore, has higher stability.
Description
Technical field
This utility model relates to laser echo signal process field, specifically refers to a kind of for anti-collision system for automobile
Laser echo signal gain control.
Background technology
In anti-collision system for automobile in the prior art, the most all there is laser ranging system, but these laser
The laser echo signal size of range unit is several millivolt, and amplitude is the least, and received signal width
Value differs in size, therefore needs programme-controlled gain to amplify.
But the laser echo signal gain control of prior art, circuit structure is complicated, and response speed is slow,
The most high defect of stability, element is the most, and the reliability of device is the lowest, it is important that noise jamming is very big,
Technical staff or other staff is made to debug process complicated, it is impossible to reach the demand of through engineering approaches.
Fill accordingly, it would be desirable to design a kind of new laser echo signal gain control for anti-collision system for automobile
Put.
Utility model content
This utility model purpose is to provide a kind of laser echo signal gain control for anti-collision system for automobile and fills
Putting, its response speed is fast, and stability is high.
This utility model solves technical problem and adopts the following technical scheme that a kind of swashing for anti-collision system for automobile
Optical echo signal gain controls device, including detection circuit, the first amplifying circuit, the second amplifying circuit, adopts
Sample circuit and controller；
Described detection circuit is connected to described first amplifying circuit, and described first amplifying circuit is connected to described
Two amplifying circuits, described first amplifying circuit is also attached to described sample circuit, and described sample circuit is with described
Controller connects；
Described detection circuit includes that model is the photodetector of APD1, resistance R1 and electric capacity C1；Described light
The positive terminal of electric explorer is connected to HV high voltage power supply by resistance R1；And the positive pole of described photodetector
End is also by electric capacity C1 ground connection；
Described first amplifying circuit include model be the chip of OPA356, resistance R2, resistance R3, resistance R4,
Resistance R5, resistance R6, electric capacity C2 and electric capacity C3；The negative pole end of described photodetector is connected to described type
Number it is-IN the pin of the chip of OPA356, and the negative pole end of described photodetector is also by resistance R5 even
It is connected to the OUT pin of the chip that described model is OPA356；The negative pole end of described photodetector is also by electricity
Hold C2 and resistance R6 and be connected to the OUT pin of the chip that described model is OPA356；Described model is
The V+ pin of the chip of OPA356 is connected to VCC power supply, and described model is the V+ pin of the chip of OPA356
Also by electric capacity C3 ground connection；Described model is that the V-pin of the chip of OPA356 passes through resistance R4 ground connection,
Described model is that+IN the pin of the chip of OPA356 is connected to VCC power supply, described model by resistance R2
For+IN the pin of chip of OPA356 also by resistance R3 ground connection；
Described second amplifying circuit include model be the chip of AD8369, electric capacity C4, electric capacity C5, electric capacity C6,
Electric capacity C7, electric capacity C8, electric capacity C9, electric capacity C10, resistance R7 and resistance R9；Described model is OPA356
The OUT pin of chip be connected to the of the chip that described model is AD8369 by resistance R7 and electric capacity C4
16 pins, described model is that the 1st pin of the chip of AD8369 is by electric capacity C5 ground connection；Described model is
15th pin ground connection of the chip of AD8369, its 12nd pin, the 13rd pin, the 14th pin are all connected with
In VCC power supply；One end of electric capacity C6 is connected to VCC power supply, other end ground connection；Described model is AD8369
The 11st pin of chip by electric capacity C7 ground connection, described model is the 10th pin of the chip of AD8369
By electric capacity C8 ground connection；Described model is the 2nd pin ground connection of the chip of AD8369；Described model is
9th pin of the chip of AD8369 passes through electric capacity C9 and resistance R9 ground connection, and described model is AD8369's
8th pin of chip passes through electric capacity C10 ground connection；
Described sample circuit includes the chip that model is MCP3424, and described model is the chip of MCP3424
13rd pin is connected to the OUT pin of the chip that described model is OPA356；
Described controller be model be the single-chip microcomputer of ATXMEGA32A4-AU, described single-chip microcomputer includes 44 pipes
Foot, the 8th pin, the 18th pin, the 30th pin and the 38th pin ground connection of wherein said single-chip microcomputer；Institute
The 9th pin, the 19th pin, the 31st pin and the 39th pin of stating single-chip microcomputer connect+3.3V power supply；Described
3rd pin of single-chip microcomputer is connected to the 7th pin of the chip that described model is AD8369；Described single-chip microcomputer
4th pin is connected to the 6th pin of the chip that described model is AD8369；5th pin of described single-chip microcomputer
It is connected to the 5th pin of the chip that described model is AD8369；6th pin of described single-chip microcomputer is connected to institute
State the 4th pin of the chip that model is AD8369；7th pin of described single-chip microcomputer is connected to described model and is
3rd pin of the chip of AD8369；It is MCP3424 that 10th pin of described single-chip microcomputer is connected to described model
The 7th pin of chip, the 11st pin of described single-chip microcomputer is connected to the chip that described model is MCP3424
The 8th pin.
This utility model has the advantages that the described laser echo signal for anti-collision system for automobile increases
Benefit controls the laser echo signal of device and detects through described photodetector, transmits to the first amplification electricity
Road；And be amplified via operational amplifier OPA356；Signal after amplification is carried out by the second amplifying circuit
Again amplifying, the signal through twice amplification can outwards export；Simultaneously through the return laser beam once amplified
Signal is sampled by sample circuit, and this sampled signal is inputted controller, and described controller is according to institute
State sampled signal, the size of the amplitude of the laser echo signal the most once amplified, control the second amplifying circuit
Gain, thus realize the control of the gain to laser echo signal.Visible of the present utility model anti-for automobile
The laser echo signal gain control hitting system realizes the process of laser echo signal by hardware circuit,
Response speed is fast；And the electronic component that used is less, therefore, has higher stability.
Accompanying drawing explanation
Fig. 1 is the mould of the laser echo signal gain control for anti-collision system for automobile of the present utility model
Block structure schematic diagram；
Fig. 2 is the electricity of the laser echo signal gain control for anti-collision system for automobile of the present utility model
Line structure schematic diagram；
Fig. 3 is the confession of the laser echo signal gain control for anti-collision system for automobile of the present utility model
The structural representation of electricity circuit；
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, the technical solution of the utility model is further elaborated.
Embodiment 1
Present embodiments provide a kind of laser echo signal gain control for anti-collision system for automobile, its
Including detection circuit, the first amplifying circuit, the second amplifying circuit, sample circuit and controller.
Described detection circuit is connected to described first amplifying circuit, and described first amplifying circuit is connected to described
Two amplifying circuits, described first amplifying circuit is also attached to described sample circuit, and described sample circuit is with described
Controller connects.
Specifically, described detection circuit includes that model is the photodetector of APD1, resistance R1, resistance R2
With electric capacity C1；The positive terminal (the 1st pin) of described photodetector is connected to HV high pressure by resistance R1
Power supply；And the positive terminal of described photodetector is also by electric capacity C1 ground connection；The negative pole of described photoelectric sensor
End (the 3rd pin) is by resistance R2 ground connection；2nd pin ground connection of described photodetector.
Described first amplifying circuit includes chip (operational amplifier) that model is OPA356, resistance R2, electricity
Resistance R3, resistance R4, resistance R5, resistance R6, electric capacity C2 and electric capacity C3；Bearing of described photodetector
Extremely it is connected to-IN the pin of described OPA356 chip, and the negative pole end of described photodetector is also by electricity
Resistance R5 is connected to the OUT pin of described OPA356 chip；The negative pole end of described photodetector is also by electricity
Hold C2 and resistance R6 and be connected to the OUT pin of described OPA356 chip；The V+ pipe of described OPA356 chip
Foot is connected to VCC power supply (+5.0V), and the V+ pin of described OPA356 chip is also by electric capacity C3 ground connection；
The V-pin of described OPA356 chip passes through resistance R4 ground connection, and+IN the pin of described OPA356 chip passes through
Resistance R2 is connected to VCC power supply (+5.0V), and+IN the pin of described OPA356 chip is also by resistance R3
Ground connection.
Described second amplifying circuit include model be the chip of AD8369, electric capacity C4, electric capacity C5, electric capacity C6,
Electric capacity C7, electric capacity C8, electric capacity C9, electric capacity C10, resistance R7 and resistance R9；Described OPA356 chip
OUT pin be connected to the 16th pin (INHI) of described AD8369 chip by resistance R7 and electric capacity C4,
1st pin (INLO) of described AD8369 chip passes through electric capacity C5 ground connection；The of described AD8369 chip
15 pin ground connection, its 12nd pin, the 13rd pin, the 14th pin are all connected to VCC power supply (+5.0V)；
One end of electric capacity C6 is connected to VCC power supply (+5.0V), other end ground connection；The of described AD8369 chip
11 pins pass through electric capacity C7 ground connection, and the 10th pin of described AD8369 chip passes through electric capacity C8 ground connection；Institute
State the 2nd pin ground connection of AD8369 chip；9th pin of described AD8369 chip passes through electric capacity C9 and electricity
Resistance R9 ground connection, the 8th pin of described AD8369 chip passes through electric capacity C10 ground connection.
Described sample circuit includes the chip that model is MCP3424, the 13rd pin of described MCP3424 chip
(CH4+) the OUT pin of described OPA356 chip it is connected to.
Described controller be model be the single-chip microcomputer of ATXMEGA32A4-AU, described single-chip microcomputer includes 44 pipes
Foot, the 8th pin, the 18th pin, the 30th pin and the 38th pin ground connection of wherein said single-chip microcomputer；Institute
The 9th pin, the 19th pin, the 31st pin and the 39th pin of stating single-chip microcomputer connect+3.3V power supply；Described
3rd pin of single-chip microcomputer is connected to the 7th pin of described AD8369 chip；4th pin of described single-chip microcomputer
It is connected to the 6th pin of described AD8369 chip；5th pin of described single-chip microcomputer is connected to described AD8369
5th pin of chip；6th pin of described single-chip microcomputer is connected to the 4th pin of described AD8369 chip；
7th pin of described single-chip microcomputer is connected to the 3rd pin of described AD8369 chip；The of described single-chip microcomputer
10 pins are connected to the 7th pin (SDA) of described MCP3424 chip, the 11st pin of described single-chip microcomputer
It is connected to the 8th pin (SCL) of described MCP3424 chip.
In the present embodiment, the laser of the described laser echo signal gain control for anti-collision system for automobile
Echo-signal detects through described photodetector, and transmission is to the first amplifying circuit；And put via computing
Big device OPA356 is amplified；Signal after amplification is amplified again by the second amplifying circuit, through two
The signal of secondary amplification can outwards export；Laser echo signal through once amplifying passes through sample circuit simultaneously
Sample, and by this sampled signal input controller, described controller according to described sampled signal, i.e. one
The size of the amplitude of the laser echo signal of secondary amplification, controls the gain of the second amplifying circuit, thus realize right
The control of the gain of laser echo signal.
In the present embodiment, described HV high voltage power supply uses Switching Power Supply or modular power source；Its voltage can
With up to+200V；Described APD1 photodetector highly sensitive, volume is little, low in energy consumption, reliability is high,
The advantages such as electromagnetism interference is strong, dynamic range is big；The multiplication of the interior lights quantum of APD1 photodetector,
Make photoelectric current significantly double, significantly improve the sensitivity of photodetector；Described APD1 photodetector selects
Select is a near-infrared enhancement mode avalanche probe.
The signal that described APD1 photodetector detects is current signal, needs the first amplifying circuit by described
Current signal be transformed to voltage signal.Described voltage signal is faint voltage signal.Described first amplifies
What the trsanscondutance amplifier of circuit was selected is the OPA356 chip of OP company.OPA356 chip have low-power consumption,
Low noise, the advantage of wide bandwidth, but it needs additional extra discrete component.The electric capacity C2 of described output and electricity
Resistance R5, resistance R6 are feedback circuits, play the effect quickly regulating system.Described electric capacity C3 is filter capacitor.
Described resistance R2 and resistance R3 is power source reference divider resistance.
The amplifier employing of described second amplifying circuit is the AD8369 gain-programmed amplifier of AD company,
AD8369 chip is digital program controlled gain, and gain step size is 3DB.The gain of the present embodiment is by digital program controlled increasing
Benefit modulation maximum, receives on+5.0V, can export maximum gain.And the gain of its output can be passed through
Controller is controlled.
In the present embodiment, the described laser echo signal gain control for anti-collision system for automobile also includes
Power supply circuits, described power supply circuits are connected with described controller circuitry, for being powered described controller；
More specifically, described power supply circuits include the chip that model is LM1117, described model is the core of LM1117
The Vin pin of sheet passes through electric capacity C80 ground connection, and also by electric capacity C50 ground connection；Described model is LM1117
The GND pin ground connection of chip, described model is that the Vout pin of the chip of LM1117 is by electric capacity C70
Ground connection, this pin is also by electric capacity C60 ground connection, and described Vout pin is+3.3V power supply side,
Described model is that the Vin pin of the chip of LM1117 is connected to VCC power supply.
The sequencing of above example only for ease of describing, does not represent the quality of embodiment.
Last it is noted that above example is only in order to illustrate the technical solution of the utility model, rather than right
It limits；Although this utility model being described in detail with reference to previous embodiment, this area common
Skilled artisans appreciate that the technical scheme described in foregoing embodiments still can be modified by it,
Or wherein portion of techniques feature is carried out equivalent；And these amendments or replacement, do not make corresponding skill
The essence of art scheme departs from the spirit and scope of this utility model each embodiment technical scheme.
Claims (1)
1. the laser echo signal gain control for anti-collision system for automobile, it is characterised in that bag
Include detection circuit, the first amplifying circuit, the second amplifying circuit, sample circuit and controller；
Described detection circuit is connected to described first amplifying circuit, and described first amplifying circuit is connected to described
Two amplifying circuits, described first amplifying circuit is also attached to described sample circuit, and described sample circuit is with described
Controller connects；
Described detection circuit includes that model is the photodetector of APD1, resistance R1 and electric capacity C1；Described light
The positive terminal of electric explorer is connected to HV high voltage power supply by resistance R1；And the positive pole of described photodetector
End is also by electric capacity C1 ground connection；
Described first amplifying circuit include model be the chip of OPA356, resistance R2, resistance R3, resistance R4,
Resistance R5, resistance R6, electric capacity C2 and electric capacity C3；The negative pole end of described photodetector is connected to described type
Number it is-IN the pin of the chip of OPA356, and the negative pole end of described photodetector is also by resistance R5 even
It is connected to the OUT pin of the chip that described model is OPA356；The negative pole end of described photodetector is also by electricity
Hold C2 and resistance R6 and be connected to the OUT pin of the chip that described model is OPA356；Described model is
The V+ pin of the chip of OPA356 is connected to VCC power supply, and described model is the V+ pin of the chip of OPA356
Also by electric capacity C3 ground connection；Described model is that the V-pin of the chip of OPA356 passes through resistance R4 ground connection,
Described model is that+IN the pin of the chip of OPA356 is connected to VCC power supply, described model by resistance R2
For+IN the pin of chip of OPA356 also by resistance R3 ground connection；
Described second amplifying circuit include model be the chip of AD8369, electric capacity C4, electric capacity C5, electric capacity C6,
Electric capacity C7, electric capacity C8, electric capacity C9, electric capacity C10, resistance R7 and resistance R9；Described model is OPA356
The OUT pin of chip be connected to the of the chip that described model is AD8369 by resistance R7 and electric capacity C4
16 pins, described model is that the 1st pin of the chip of AD8369 is by electric capacity C5 ground connection；Described model is
15th pin ground connection of the chip of AD8369, its 12nd pin, the 13rd pin, the 14th pin are all connected with
In VCC power supply；One end of electric capacity C6 is connected to VCC power supply, other end ground connection；Described model is AD8369
The 11st pin of chip by electric capacity C7 ground connection, described model is the 10th pin of the chip of AD8369
By electric capacity C8 ground connection；Described model is the 2nd pin ground connection of the chip of AD8369；Described model is
9th pin of the chip of AD8369 passes through electric capacity C9 and resistance R9 ground connection, and described model is AD8369's
8th pin of chip passes through electric capacity C10 ground connection；
Described sample circuit includes the chip that model is MCP3424, and described model is the chip of MCP3424
13rd pin is connected to the OUT pin of the chip that described model is OPA356；
Described controller be model be the single-chip microcomputer of ATXMEGA32A4-AU, described single-chip microcomputer includes 44 pipes
Foot, the 8th pin, the 18th pin, the 30th pin and the 38th pin ground connection of wherein said single-chip microcomputer；Institute
The 9th pin, the 19th pin, the 31st pin and the 39th pin of stating single-chip microcomputer connect+3.3V power supply；Described
3rd pin of single-chip microcomputer is connected to the 7th pin of the chip that described model is AD8369；Described single-chip microcomputer
4th pin is connected to the 6th pin of the chip that described model is AD8369；5th pin of described single-chip microcomputer
It is connected to the 5th pin of the chip that described model is AD8369；6th pin of described single-chip microcomputer is connected to institute
State the 4th pin of the chip that model is AD8369；7th pin of described single-chip microcomputer is connected to described model and is
3rd pin of the chip of AD8369；It is MCP3424 that 10th pin of described single-chip microcomputer is connected to described model
The 7th pin of chip, the 11st pin of described single-chip microcomputer is connected to the chip that described model is MCP3424
The 8th pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620067458.3U CN205749888U (en) | 2016-01-22 | 2016-01-22 | Laser echo signal gain control for anti-collision system for automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620067458.3U CN205749888U (en) | 2016-01-22 | 2016-01-22 | Laser echo signal gain control for anti-collision system for automobile |
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| Publication Number | Publication Date |
|---|---|
| CN205749888U true CN205749888U (en) | 2016-11-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620067458.3U Expired - Fee Related CN205749888U (en) | 2016-01-22 | 2016-01-22 | Laser echo signal gain control for anti-collision system for automobile |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111308477A (en) * | 2019-11-29 | 2020-06-19 | 深圳市镭神智能***有限公司 | Laser radar receiving system and laser radar |
-
2016
- 2016-01-22 CN CN201620067458.3U patent/CN205749888U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111308477A (en) * | 2019-11-29 | 2020-06-19 | 深圳市镭神智能***有限公司 | Laser radar receiving system and laser radar |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161130 |