CN205749886U - High frequency lasers echo-signal gain control for anti-collision system for automobile - Google Patents
High frequency lasers echo-signal gain control for anti-collision system for automobile Download PDFInfo
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- CN205749886U CN205749886U CN201620067409.XU CN201620067409U CN205749886U CN 205749886 U CN205749886 U CN 205749886U CN 201620067409 U CN201620067409 U CN 201620067409U CN 205749886 U CN205749886 U CN 205749886U
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Abstract
The utility model discloses a kind of high frequency lasers echo-signal gain control for anti-collision system for automobile, it includes detection circuit, mutual conductance amplifying circuit, amplifying circuit and the isolation circuit being sequentially connected with, and the controller being connected with described amplifying circuit.This utility model is through described photodetector exploring laser light echo-signal, and transmits this signal to mutual conductance amplifying circuit and process；It is output as differential signal；Again amplify through amplifying circuit, and after isolation circuit, i.e. can obtain the process signal after denoising；And described controller can control the gain of described amplifying circuit, thus realize the control of the gain to laser echo signal.The visible high frequency lasers 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 high frequency lasers echo-signal gain control for anti-collision system for automobile.
Background technology
In anti-collision system for automobile in the prior art, the most all having laser ranging system, but the laser echo signal size of these laser ranging systems is several millivolt, amplitude is the least, and received signal amplitude differs in size, therefore needs programme-controlled gain to amplify.
But the high frequency lasers echo-signal denoising device of prior art, circuit structure is complicated, 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 the biggest, technical staff or other staff is made to debug process complicated, it is impossible to reach the demand of through engineering approaches.
Accordingly, it would be desirable to design a kind of new high frequency lasers echo-signal gain control for anti-collision system for automobile.
Utility model content
This utility model purpose is to provide a kind of high frequency lasers echo-signal gain control for anti-collision system for automobile, and 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 high frequency lasers echo-signal gain control for anti-collision system for automobile, and it includes detection circuit, mutual conductance amplifying circuit, amplifying circuit, isolation circuit, controller and power supply circuits；
Described detection circuit is connected to described mutual conductance amplifying circuit, and described mutual conductance amplifying circuit is connected to described amplifying circuit, and described amplifying circuit is connected to described isolation circuit；Described controller signals is connected to described amplifying circuit；
Described power supply circuits are connected with described controller circuitry；
Described detection circuit includes that model is the photodetector of APD1, resistance R1, resistance R2 and electric capacity C1；The positive terminal of described photodetector is connected to HV high voltage power supply by resistance R1；And the positive terminal of described photodetector is also by electric capacity C1 ground connection；The negative pole end of described photodetector passes through resistance R2 ground connection；
Described mutual conductance amplifying circuit includes that model is the chip of AD8015, electric capacity C2 and electric capacity C3；The negative pole end of described photodetector is connected to the lin pin of the chip that described model is AD8015 by electric capacity C2；Described model is that the VBYP pin of the chip of AD8015 is connected to VCC power supply by electric capacity C3, and described model is the-VS pin ground connection of the chip of AD8015；And+VS the end of the chip that described model is AD8015 is connected to VCC power supply；
Described amplifying circuit includes that model is the chip of AD8369, resistance R3, resistance R4, electric capacity C4, electric capacity C5, electric capacity C6, electric capacity C7 and electric capacity C8；Described model is the 16th pin that+OUT pin of the chip of AD8015 is connected to the chip that described model is AD8369 by resistance R3 and electric capacity C4；Described model is the 1st pin that-OUT pin of the chip of AD8015 is connected to the chip that described model is AD8369 by resistance R4 and electric capacity C5；Described model is the 15th pin ground connection of the chip of AD8369, its the 12nd pin, the 13rd pin, the 14th pin are all connected to VCC power supply, described model is that the 11st pin of the chip of AD8369 passes through electric capacity C7 ground connection, and described model is that the 10th pin of the chip of AD8369 is by electric capacity C8 ground connection；Described model is the 2nd pin ground connection of the chip of AD8369；
Described isolation circuit includes that electric capacity C9, electric capacity C10 and model are the radio-frequency transformer of TC4-1W；Described model is one end that the 9th pin of the chip of AD8369 is connected to the first siding ring of described radio-frequency transformer by electric capacity C9；Model is the other end that the 8th pin of the chip of AD8369 is connected to the first siding ring of described radio-frequency transformer by electric capacity C10；
Described controller be model be the single-chip microcomputer of ATXMEGA32A4-AU, described single-chip microcomputer includes 44 pins, the 8th pin, the 18th pin, the 30th pin and the 38th pin ground connection of wherein said single-chip microcomputer；9th pin, the 19th pin, the 31st pin and the 39th pin of described single-chip microcomputer connect+3.3V power supply；3rd pin of described single-chip microcomputer is connected to the 7th pin of the chip that model is AD8369；4th pin of described single-chip microcomputer is connected to the 6th pin of the chip that described model is AD8369；5th pin of described single-chip microcomputer is connected to the 5th pin of the chip that described model is AD8369；6th pin of described single-chip microcomputer is connected to the 4th pin of the chip that described model is AD8369；7th pin of described single-chip microcomputer is connected to the 3rd pin of the chip that model is AD8369.
Alternatively, described power supply circuits include the chip that model is LM1117, and described model is that the Vin pin of the chip of LM1117 passes through electric capacity C80 ground connection, and also by electric capacity C50 ground connection；Described model is the GND pin ground connection of the chip of LM1117, described model is that the Vout pin of the chip of LM1117 is by electric capacity C70 ground connection, described model is that the Vout pin of the chip of LM1117 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.
This utility model has the advantages that in the present embodiment, and the described laser echo signal for the high frequency lasers echo-signal gain control of anti-collision system for automobile detects through described photodetector, and transmission is to mutual conductance amplifying circuit；And after processing via trsanscondutance amplifier AD8015, it is output as differential signal；Described differential signal amplifies again through amplifying circuit, after the differential signal through again amplifying passes through isolation circuit, i.e. can obtain final process signal, and this final process signal can be sent into single-chip microcomputer and process；Described controller can control the gain of the amplifier AD8369 chip of described amplifying circuit, thus realizes the control of the gain to laser echo signal.The visible high frequency lasers 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.
Accompanying drawing explanation
Fig. 1 is the modular structure schematic diagram of the high frequency lasers echo-signal gain control for anti-collision system for automobile of the present utility model；
Fig. 2 is the electrical block diagram of the high frequency lasers echo-signal gain control for anti-collision system for automobile of the present utility model；
Fig. 3 is the power supply circuit construction schematic diagram of the high frequency lasers echo-signal gain control for anti-collision system for automobile of the present utility model；
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 providing a kind of high frequency lasers echo-signal gain control for anti-collision system for automobile, it includes detection circuit, mutual conductance amplifying circuit, amplifying circuit, isolation circuit and controller.
Described detection circuit is connected to described mutual conductance amplifying circuit, and described mutual conductance amplifying circuit is connected to described amplifying circuit, and described amplifying circuit is connected to described isolation circuit；Described controller signals is connected to described amplifying circuit, so that described amplifying circuit is carried out gain control.
Specifically, described detection circuit includes that model is the photodetector of APD1, resistance R1, resistance R2 and electric capacity C1；The positive terminal (the 1st pin) of described photodetector is connected to HV high voltage power supply by resistance R1；And the positive terminal of described photodetector is also by electric capacity C1 ground connection；The negative pole end (the 3rd pin) of described photodetector passes through resistance R2 ground connection；2nd pin ground connection of described photodetector.
Described mutual conductance amplifying circuit includes that model is the chip of AD8015, electric capacity C2 and electric capacity C3；The negative pole end of described photodetector is connected to the lin pin of described AD8015 chip by electric capacity C2；The VBYP pin of described AD8015 chip is connected to VCC power supply (+5.0V) by electric capacity C3 ,-VS pin the ground connection of described AD8015 chip；And+VS the end of described AD8015 chip is connected to VCC power supply (+5.0V).
Described amplifying circuit includes that model is the chip of AD8369, resistance R3, resistance R4, electric capacity C4, electric capacity C5, electric capacity C6, electric capacity C7 and electric capacity C8；+ OUT the pin of described AD8015 chip is connected to the 16th pin (INHI) of described AD8369 chip by resistance R3 and electric capacity C4；-OUT the pin of described AD8015 chip is connected to the 1st pin (INLO) of described AD8369 chip by resistance R4 and electric capacity C5；15th pin ground connection of described AD8369 chip, its the 12nd pin, the 13rd pin, the 14th pin are all connected to VCC power supply (+5.0V), 11st pin of described AD8369 chip passes through electric capacity C7 ground connection, and the 10th pin of described AD8369 chip passes through electric capacity C8 ground connection；2nd pin ground connection of described AD8369 chip.
Described isolation circuit includes that electric capacity C9, electric capacity C10 and model are the radio-frequency transformer of TC4-1W；9th pin of described AD8369 chip is connected to one end of the first siding ring of described radio-frequency transformer by electric capacity C9；8th pin of described AD8369 chip is connected to the other end of the first siding ring of described radio-frequency transformer by electric capacity C10；The second siding ring of described radio-frequency transformer can realize signal output.
Described controller be model be the single-chip microcomputer of ATXMEGA32A4-AU, described single-chip microcomputer includes 44 pins, the 8th pin, the 18th pin, the 30th pin and the 38th pin ground connection of wherein said single-chip microcomputer；9th pin, the 19th pin, the 31st pin and the 39th pin of described single-chip microcomputer connect+3.3V power supply；3rd pin of described single-chip microcomputer is connected to the 7th pin of described AD8369 chip；4th pin of described single-chip microcomputer is connected to the 6th pin of described AD8369 chip；5th pin of described single-chip microcomputer is connected to the 5th pin of described AD8369 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.
In the present embodiment, the described laser echo signal for the high frequency lasers echo-signal gain control of anti-collision system for automobile detects through described photodetector, and transmission is to mutual conductance amplifying circuit；And after processing via trsanscondutance amplifier AD8015, it is output as differential signal；Described differential signal amplifies again through amplifying circuit, after the differential signal through again amplifying passes through isolation circuit, i.e. can obtain final process signal, and this final process signal can be sent into single-chip microcomputer and process；Described controller can control the gain of the amplifier AD8369 chip of described amplifying circuit, thus realizes the control of the gain to laser echo signal.
In the present embodiment, described HV high voltage power supply uses Switching Power Supply or modular power source；Its voltage can be up to+200V；Highly sensitive, the advantage such as volume is little, low in energy consumption, reliability is high, electromagnetism interference is strong, dynamic range is big of described APD1 photodetector；The multiplication of the interior lights quantum of APD1 photodetector, makes photoelectric current significantly double, and significantly improves the sensitivity of photodetector；What described APD1 photodetector selected is a near-infrared enhancement mode avalanche probe.
The signal that described APD1 photodetector detects is current signal, needs mutual conductance amplifying circuit that described current signal is transformed to voltage signal.Described voltage signal is faint voltage signal.What the trsanscondutance amplifier of described mutual conductance amplifying circuit was selected is the AD8015 chip of AD company.AD8015 chip has the advantage of low-power consumption, low noise, wide bandwidth, and it has been internally integrated operational amplifier and feedback device, and therefore without additional extra discrete component, circuit controls simple.
Described resistance R3 and R4 is high frequency output build-out resistor, and described electric capacity C3 is partially installing capacitor.
The faint voltage signal size of described trsanscondutance amplifier output is several mv, and received signal amplitude differs in size, therefore needs programme-controlled gain to amplify.
Described laser echo signal, through the electric capacity C4 and electric capacity C5 of amplifying circuit, enters the amplifier AD8369 chip of amplifying circuit；Described electric capacity C4 and electric capacity C5 is capacitance.
Described AD8369 chip is the gain-programmed amplifier of AD company, and it is digital program controlled gain, and gain step size is 3DB.
In the present embodiment, the described high frequency lasers echo-signal gain control for anti-collision system for automobile also includes that power supply circuits, described power supply circuits are connected with described controller circuitry, to be powered described controller；More specifically, described power supply circuits include the chip that model is LM1117, described model is that the Vin pin of the chip of LM1117 passes through electric capacity C80 ground connection, and also by electric capacity C50 ground connection；Described model is the GND pin ground connection of the chip of LM1117, 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, it is not intended to limit；Although this utility model being described in detail with reference to previous embodiment, it will be understood by those within the art 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 the essence of appropriate technical solution depart from the spirit and scope of this utility model each embodiment technical scheme.
Claims (1)
1. the high frequency lasers echo-signal gain control for anti-collision system for automobile, it is characterised in that include detection circuit, mutual conductance amplifying circuit, amplifying circuit, isolation circuit, controller and power supply circuits；
Described detection circuit is connected to described mutual conductance amplifying circuit, and described mutual conductance amplifying circuit is connected to described amplifying circuit, and described amplifying circuit is connected to described isolation circuit；Described controller signals is connected to described amplifying circuit；
Described power supply circuits are connected with described controller circuitry；
Described detection circuit includes that model is the photodetector of APD1, resistance R1, resistance R2 and electric capacity C1；The positive terminal of described photodetector is connected to HV high voltage power supply by resistance R1；And the positive terminal of described photodetector is also by electric capacity C1 ground connection；The negative pole end of described photodetector passes through resistance R2 ground connection；
Described mutual conductance amplifying circuit includes that model is the chip of AD8015, electric capacity C2 and electric capacity C3；The negative pole end of described photodetector is connected to the lin pin of the chip that described model is AD8015 by electric capacity C2；Described model is that the VBYP pin of the chip of AD8015 is connected to VCC power supply by electric capacity C3, and described model is the-VS pin ground connection of the chip of AD8015；And+VS the end of the chip that described model is AD8015 is connected to VCC power supply；
Described amplifying circuit includes that model is the chip of AD8369, resistance R3, resistance R4, electric capacity C4, electric capacity C5, electric capacity C6, electric capacity C7 and electric capacity C8；Described model is the 16th pin that+OUT pin of the chip of AD8015 is connected to the chip that described model is AD8369 by resistance R3 and electric capacity C4；Described model is the 1st pin that-OUT pin of the chip of AD8015 is connected to the chip that described model is AD8369 by resistance R4 and electric capacity C5；Described model is the 15th pin ground connection of the chip of AD8369, its the 12nd pin, the 13rd pin, the 14th pin are all connected to VCC power supply, described model is that the 11st pin of the chip of AD8369 passes through electric capacity C7 ground connection, and described model is that the 10th pin of the chip of AD8369 is by electric capacity C8 ground connection；Described model is the 2nd pin ground connection of the chip of AD8369；
Described isolation circuit includes that electric capacity C9, electric capacity C10 and model are the radio-frequency transformer of TC4-1W；Described model is one end that the 9th pin of the chip of AD8369 is connected to the first siding ring of described radio-frequency transformer by electric capacity C9；Model is the other end that the 8th pin of the chip of AD8369 is connected to the first siding ring of described radio-frequency transformer by electric capacity C10；
Described controller be model be the single-chip microcomputer of ATXMEGA32A4-AU, described single-chip microcomputer includes 44 pins, the 8th pin, the 18th pin, the 30th pin and the 38th pin ground connection of wherein said single-chip microcomputer；9th pin, the 19th pin, the 31st pin and the 39th pin of described single-chip microcomputer connect+3.3V power supply；3rd pin of described single-chip microcomputer is connected to the 7th pin of the chip that model is AD8369；4th pin of described single-chip microcomputer is connected to the 6th pin of the chip that described model is AD8369；5th pin of described single-chip microcomputer is connected to the 5th pin of the chip that described model is AD8369；6th pin of described single-chip microcomputer is connected to the 4th pin of the chip that described model is AD8369；7th pin of described single-chip microcomputer is connected to the 3rd pin of the chip that model is AD8369；
Described power supply circuits include the chip that model is LM1117, and described model is that the Vin pin of the chip of LM1117 passes through electric capacity C80 ground connection, and also by electric capacity C50 ground connection；Described model is the GND pin ground connection of the chip of LM1117, described model is that the Vout pin of the chip of LM1117 is by electric capacity C70 ground connection, described model is that the Vout pin of the chip of LM1117 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620067409.XU CN205749886U (en) | 2016-01-22 | 2016-01-22 | High frequency lasers echo-signal gain control for anti-collision system for automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620067409.XU CN205749886U (en) | 2016-01-22 | 2016-01-22 | High frequency lasers echo-signal gain control for anti-collision system for automobile |
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| Publication Number | Publication Date |
|---|---|
| CN205749886U true CN205749886U (en) | 2016-11-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620067409.XU Expired - Fee Related CN205749886U (en) | 2016-01-22 | 2016-01-22 | High frequency lasers echo-signal gain control for anti-collision system for automobile |
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| Country | Link |
|---|---|
| CN (1) | CN205749886U (en) |
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2016
- 2016-01-22 CN CN201620067409.XU patent/CN205749886U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
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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 |