CN207882439U - Automobile active anticollision millimetre-wave radar system - Google Patents
Automobile active anticollision millimetre-wave radar system Download PDFInfo
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- CN207882439U CN207882439U CN201820349751.8U CN201820349751U CN207882439U CN 207882439 U CN207882439 U CN 207882439U CN 201820349751 U CN201820349751 U CN 201820349751U CN 207882439 U CN207882439 U CN 207882439U
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Abstract
The utility model discloses one kind capable of realizing cost effective, miniaturization, low in energy consumption, while the higher automobile active anticollision millimetre-wave radar system of receive-transmit isolation.The system includes dual-mode antenna module, RF receiving and transmission module, data processing module, power supply, and RF receiving and transmission module includes radiating circuit and receiving circuit；Radiating circuit includes frequency synthesizer of phase locking, low-pass filter, frequency divider, voltage-controlled oscillator (VCO), first power divider, second power divider, power amplifier, power frequency multiplier, receiving circuit includes low-noise amplifier, third power divider, 4th power divider, first phase shifter, second phase shifter, first frequency mixer, second frequency mixer, first frequency-selective amplifier, second frequency-selective amplifier, first R4 filters, 2nd R4 filters, the RF receiving and transmission module is realized cost effective under the premise of ensureing system index, miniaturization, reduce power consumption, improve receive-transmit isolation simultaneously.It is suitble to promote and apply in radar system.
Description
Technical field
The utility model is related to radar system field, especially a kind of automobile active anticollision millimetre-wave radar system.
Background technology
In recent years, traffic problems have become and influence one of socio-economic development and people's lives safety and great ask
Topic.In order to effectively reduce traffic accident rate and protection personal safety.Since 1971, occurred in succession
The active automobile anti-collision system of the various ways such as ultrasonic wave, laser, infrared, microwave, but above anti-collision system all has one
A little shortcomings, such as can be influenced by weather, ranging is short, of high cost.Therefore fail the large-scale popularization application on automobile.It is subsequent again
Using measures such as driving safety band, air bags, but these defensive measures are Passive Defences, cannot fundamentally solve to ask
Topic.Millimetre-wave radar has many advantages, such as high-resolution, low-power consumption, small size and almost round-the-clock ability to work.Utilize millimeter
Active Anticollision Radar of the wave radar as automobile can be effectively reduced the probability of traffic accident generation, be carried being widely used in
In the safety of high vehicle.But since it is expensive, now can not also popularization and application to low and middle-grade vehicles.How it is reduced
Cost finds the starting point that best compromise point is the present invention among performance and price.Millimetre-wave radar can be in automobile active
The critical issue of anticollision field application is the cost and reliability of system, wherein the integrated level for improving radar front end plays decision
Effect.
Utility model content
The technical problem to be solved by the utility model is to provide one kind can realize it is cost effective, miniaturization, it is low in energy consumption,
The higher automobile active anticollision millimetre-wave radar system of receive-transmit isolation simultaneously.
Technical solution adopted by the utility model to solve its technical problems is：The automobile active anticollision millimetre-wave radar system
System, including dual-mode antenna module, RF receiving and transmission module, data processing module, power supply, the dual-mode antenna module, data
Processing module is connected with RF receiving and transmission module respectively, and the RF receiving and transmission module, data processing module are electric with power supply respectively
Connection, the dual-mode antenna module include two reception antennas and a transmitting antenna, and two reception antennas and one emit day
Line is connected with RF receiving and transmission module respectively, and the RF receiving and transmission module includes radiating circuit and receiving circuit；The radiating circuit
Including frequency synthesizer of phase locking, low-pass filter, frequency divider, voltage-controlled oscillator (VCO), the first power divider, the second power distribution
Device, power amplifier, power frequency multiplier, the input terminal of the frequency synthesizer of phase locking are connected with fpga chip, the locking phase frequency
The output end of rate synthesizer is connected with the input terminal of the input terminal of low-pass filter, frequency divider respectively, the low-pass filter
Output end, frequency divider output end be connected respectively with the input terminal of voltage-controlled oscillator (VCO), the output end of the voltage-controlled oscillator (VCO) and
One power divider is connected, the output end of first power divider respectively with power amplifier, the second power divider phase
Even, the output end of the power amplifier is connected with the input terminal of power frequency multiplier, the output end and hair of the power frequency multiplier
Antenna is penetrated to be connected；The receiving circuit includes low-noise amplifier, third power divider, the 4th power divider, the first shifting
Phase device, the second phase shifter, the first frequency mixer, the second frequency mixer, the first frequency-selective amplifier, the second frequency-selective amplifier, the first R4 filters
Wave device, the 2nd R4 filters, the input terminal of the low-noise amplifier are connected with reception antenna, the low-noise amplifier it is defeated
Outlet is connected with the input terminal of the 4th power divider, the output end input with the first phase shifter respectively of the 4th power divider
End, the input terminal of the second frequency mixer are connected, and the output end of the first phase shifter is connected with the input terminal of the first frequency mixer, third power
The input terminal of distributor is connected with the output end of the second power divider, and the output end of third power divider is mixed with first respectively
The input terminal of frequency device, the input terminal of the second phase shifter are connected, the output of the output end and the second frequency mixer of second phase shifter
End be connected, the output end of first frequency mixer is connected with the input terminal of the first frequency-selective amplifier, the first frequency-selective amplifier it is defeated
Outlet is connected with the input terminal of the first R4 filters, the input terminal of the output end and the second frequency-selective amplifier of second frequency mixer
It is connected, the output end of the second frequency-selective amplifier is connected with the input terminal of the 2nd R4 filters, the output end of the 2nd R4 filters, the
The output end of one R4 filters is connected with fpga chip respectively.
Further, the frequency divider is 1/400 frequency divider.
Further, first phase shifter, the second phase shifter are 45 ° of phase shifters.
Further, first frequency-selective amplifier, the second frequency-selective amplifier are intermediate frequency amplifier.
The utility model has the beneficial effects that：Automobile active anticollision millimetre-wave radar system described in the utility model passes through
RF receiving and transmission module is improved, which includes radiating circuit and receiving circuit transmitting terminal, radiating circuit
Operation principle is as follows：It is closed by frequency synthesizer of phase locking by the low frequency triangular wave swept frequency signal that data processing module provides
At the swept-frequency signal of synthesis passes sequentially through low-frequency filter and frequency divider respectively, and voltage-controlled shake is carried out subsequently into voltage-controlled oscillator (VCO)
It swings, being divided into two-way using the first power divider emits signal, wherein transmitting signal passes through the first power distribution successively all the way
Device, power amplifier, the processing of power frequency multiplier, are finally radiate by feeder line from transmitting antenna；Another way emits signal and passes through
Second power divider；The operation principle of receiving circuit is as follows：The echo-signal that every road reception antenna is received, successively
After low-noise amplifier and the 4th power divider, signal is divided into two-way, wherein all the way after the first phase shifter with
The signal in orthogonal of the transmitting all the way mixing for passing through the second power divider, third power divider successively, forms echo base band letter in reply
It number send to the first frequency-selective amplifier, the first R4 filters, obtains 2 road I/Q zero intermediate frequency signals, realize the correlation demodulation to echo；
In addition all the way with successively pass through the second power divider, third power divider, the second phase shifter transmitting signal in orthogonal all the way
Mixing forms echo baseband complex signal and send to the second frequency-selective amplifier, the 2nd R4 filters, obtains 2 road I/Q zero intermediate frequencys letters
Number, realize the correlation demodulation to echo；It not only can greatly simplify circuit, while can effectively ensure that echo baseband signal
Integrality；The RF receiving and transmission module can greatly simplify system structure under the premise of ensureing system index, cost effective, small-sized
Change, reduce power consumption, while improving receive-transmit isolation.
Description of the drawings
Fig. 1 is the structure diagram of automobile active anticollision millimetre-wave radar system described in the utility model；
Fig. 2 is the structure diagram of RF receiving and transmission module described in the utility model.
Specific implementation mode
The utility model is further illustrated with reference to the accompanying drawings and examples.
As shown in Figure 1 to Figure 2, automobile active anticollision millimetre-wave radar system described in the utility model, including transmitting-receiving day
Wire module, RF receiving and transmission module, data processing module, power supply, the dual-mode antenna module, data processing module respectively with
RF receiving and transmission module is connected, and the RF receiving and transmission module, data processing module are electrically connected with power supply respectively, the transmitting-receiving day
Wire module includes two reception antennas and a transmitting antenna, two reception antennas and a transmitting antenna respectively with radio-frequency receiving-transmitting
Module is connected, and the RF receiving and transmission module includes radiating circuit and receiving circuit；The radiating circuit includes Phase locking frequency synthesis
Device, low-pass filter, frequency divider, voltage-controlled oscillator (VCO), the first power divider, the second power divider, power amplifier, power
The input terminal of frequency multiplier, the frequency synthesizer of phase locking is connected with fpga chip, the output end point of the frequency synthesizer of phase locking
It is not connected with the input terminal of the input terminal of low-pass filter, frequency divider, the output of the output end, frequency divider of the low-pass filter
End is connected with the input terminal of voltage-controlled oscillator (VCO) respectively, and the output end of the voltage-controlled oscillator (VCO) is connected with the first power divider, institute
The output end for stating the first power divider is connected with power amplifier, the second power divider respectively, the power amplifier
Output end is connected with the input terminal of power frequency multiplier, and the output end of the power frequency multiplier is connected with transmitting antenna；The reception
Circuit includes low-noise amplifier, third power divider, the 4th power divider, the first phase shifter, the second phase shifter, first
Frequency mixer, the second frequency mixer, the first frequency-selective amplifier, the second frequency-selective amplifier, the first R4 filters, the 2nd R4 filters, institute
The input terminal for stating low-noise amplifier is connected with reception antenna, the output end of the low-noise amplifier and the 4th power divider
Input terminal be connected, the output end input with the input terminal of the first phase shifter, the second frequency mixer respectively of the 4th power divider
End is connected, and the output end of the first phase shifter is connected with the input terminal of the first frequency mixer, the input terminal of third power divider and the
The output ends of two power dividers is connected, the output end of third power divider respectively with the input terminal of the first frequency mixer, second
The input terminal of phase shifter is connected, and the output end of second phase shifter is connected with the output end of the second frequency mixer, and described first is mixed
The output end of frequency device is connected with the input terminal of the first frequency-selective amplifier, the output end of the first frequency-selective amplifier and the first R4 filters
Input terminal be connected, the output end of second frequency mixer is connected with the input terminal of the second frequency-selective amplifier, the second frequency-selecting amplify
The output end of device is connected with the input terminal of the 2nd R4 filters, the output of the output end, the first R4 filters of the 2nd R4 filters
End is connected with fpga chip respectively.The RF receiving and transmission module includes radiating circuit and receiving circuit transmitting terminal, the work of radiating circuit
It is as follows to make principle：The low frequency triangular wave swept frequency signal provided by data processing module is synthesized by frequency synthesizer of phase locking,
The swept-frequency signal of synthesis passes sequentially through low-frequency filter and frequency divider respectively, and voltage-controlled concussion is carried out subsequently into voltage-controlled oscillator (VCO),
Using the first power divider be divided into two-way emit signal, wherein all the way transmitting signal successively pass through the first power divider,
Power amplifier, the processing of power frequency multiplier, are finally radiate by feeder line from transmitting antenna；Another way emits signal and passes through second
Power divider；The operation principle of receiving circuit is as follows：The echo-signal that every road reception antenna is received, passes sequentially through
After low-noise amplifier and the 4th power divider, signal is divided into two-way, wherein all the way after the first phase shifter and successively
It is mixed by the signal in orthogonal of transmitting all the way of the second power divider, third power divider, forms echo baseband complex signal and send
To the first frequency-selective amplifier, the first R4 filters, 2 road I/Q zero intermediate frequency signals are obtained, realize the correlation demodulation to echo；In addition
It is mixed all the way with successively by the signal in orthogonal of transmitting all the way of the second power divider, third power divider, the second phase shifter
, it forms echo baseband complex signal and send to the second frequency-selective amplifier, the 2nd R4 filters, obtain 2 road I/Q zero intermediate frequency signals, it is real
Now to the correlation demodulation of echo；It not only can greatly simplify circuit, while can effectively ensure that the complete of echo baseband signal
Property；The RF receiving and transmission module can greatly simplify system structure under the premise of ensureing system index, cost effective, miniaturization,
Power consumption is reduced, while improving receive-transmit isolation.
In order to keep transmitting-receiving effect more preferable, the frequency divider is 1/400 frequency divider.First phase shifter, the second phase shifter
It is 45 ° of phase shifters.First frequency-selective amplifier, the second frequency-selective amplifier are intermediate frequency amplifier.
The data processing module includes signal acquisition circuit, DDS chips, fpga chip, the signal acquisition circuit packet
Gain-programmed amplifier and ADC chips are included, the gain-programmed amplifier is connected with ADC chips, the ADC chips, DDS chips
It is connected respectively with fpga chip, the fpga chip is electrically connected with power supply, the fpga chip and RF receiving and transmission module phase
Even.Automobile active anticollision millimetre-wave radar system described in the utility model is by being improved data processing module, the number
Conditioning is carried out to the return signal that reception antenna receives by signal acquisition circuit according to processing module and ADC is converted；Pass through DDS
Chip generates the required FMCW signal of transmitting antenna；Signal acquisition circuit and DDS chips are controlled using fpga chip,
The quick processing to data may be implemented, while data processing module can be made to realize miniaturization, it is integrated, and reduce data
The power consumption of processing module.
Further, further including RS232 interface circuit, the RS232 interface circuit is connected with fpga chip.By setting
RS232 interface circuit is set, it can be by data transmission that data processing module is handled to host computer, the convenient processing to data
With monitoring.
The fpga chip is preferably Spartan-3 chips, and the exploitation chip of Spartan-3 series is not only with abundant
Logical resource, storage resource and calculation resources, also the I/O interfaces with various high speeds, while the Spartan-3 chips are mainly
It is directed to inexpensive, large capacity Electronic Design and develops, the power consumption of data processing module can be further decreased；DDS cores
The phase noise of piece and the linearity of fm waveform directly affect the quality that transmitting antenna sends signal, in order to ensure transmitting antenna
The quality of signal is sent, the DDS chips are preferably AD9913 chips.
Claims (4)
1. automobile active anticollision millimetre-wave radar system, including dual-mode antenna module, RF receiving and transmission module, data processing module,
Power supply, the dual-mode antenna module, data processing module are connected with RF receiving and transmission module respectively, the radio-frequency receiving-transmitting mould
Block, data processing module are electrically connected with power supply respectively, and the dual-mode antenna module includes two reception antennas and a hair
Antenna is penetrated, two reception antennas and a transmitting antenna are connected with RF receiving and transmission module respectively, it is characterised in that：The radio frequency is received
It includes radiating circuit and receiving circuit to send out module；The radiating circuit includes frequency synthesizer of phase locking, low-pass filter, frequency dividing
Device, voltage-controlled oscillator (VCO), the first power divider, the second power divider, power amplifier, power frequency multiplier, the locking phase frequency
The input terminal of rate synthesizer is connected with fpga chip, and the output end of the frequency synthesizer of phase locking is defeated with low-pass filter respectively
Enter end, frequency divider input terminal be connected, the output end of the low-pass filter, the output end of frequency divider respectively with voltage-controlled oscillator (VCO)
Input terminal be connected, the output end of the voltage-controlled oscillator (VCO) is connected with the first power divider, first power divider
Output end is connected with power amplifier, the second power divider respectively, output end and the power frequency multiplier of the power amplifier
Input terminal be connected, the output end of the power frequency multiplier is connected with transmitting antenna；The receiving circuit includes low noise amplification
Device, third power divider, the 4th power divider, the first phase shifter, the second phase shifter, the first frequency mixer, the second frequency mixer,
First frequency-selective amplifier, the second frequency-selective amplifier, the first R4 filters, the 2nd R4 filters, the low-noise amplifier it is defeated
Entering end with reception antenna to be connected, the output end of the low-noise amplifier is connected with the input terminal of the 4th power divider, and the 4th
The output end of power divider is connected with the input terminal of the input terminal of the first phase shifter, the second frequency mixer respectively, the first phase shifter
Output end be connected with the input terminal of the first frequency mixer, the output of the input terminal of third power divider and the second power divider
End is connected, and the output end of third power divider is connected with the input terminal of the input terminal of the first frequency mixer, the second phase shifter respectively,
The output end of second phase shifter is connected with the output end of the second frequency mixer, the output end of first frequency mixer and the first choosing
The input terminal of audio amplifier is connected, and the output end of the first frequency-selective amplifier is connected with the input terminal of the first R4 filters, and described the
The output end of two frequency mixers is connected with the input terminal of the second frequency-selective amplifier, and the output end of the second frequency-selective amplifier and the 2nd R4 are filtered
The input terminal of wave device is connected, and the output end of the 2nd R4 filters, the output end of the first R4 filters are connected with fpga chip respectively.
2. automobile active anticollision millimetre-wave radar system as described in claim 1, it is characterised in that：The frequency divider is 1/
400 frequency dividers.
3. automobile active anticollision millimetre-wave radar system as claimed in claim 2, it is characterised in that：First phase shifter,
Second phase shifter is 45 ° of phase shifters.
4. automobile active anticollision millimetre-wave radar system as claimed in claim 3, it is characterised in that：The first frequency-selecting amplification
Device, the second frequency-selective amplifier are intermediate frequency amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820349751.8U CN207882439U (en) | 2018-03-14 | 2018-03-14 | Automobile active anticollision millimetre-wave radar system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820349751.8U CN207882439U (en) | 2018-03-14 | 2018-03-14 | Automobile active anticollision millimetre-wave radar system |
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| Publication Number | Publication Date |
|---|---|
| CN207882439U true CN207882439U (en) | 2018-09-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820349751.8U Expired - Fee Related CN207882439U (en) | 2018-03-14 | 2018-03-14 | Automobile active anticollision millimetre-wave radar system |
Country Status (1)
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110677169A (en) * | 2019-10-19 | 2020-01-10 | 北京工业大学 | Double-channel voice signal simultaneous transmission transceiver |
| CN111398674A (en) * | 2020-03-30 | 2020-07-10 | 西南科技大学 | Ultra-wideband power level measurement and control circuit |
| CN113820666A (en) * | 2021-08-02 | 2021-12-21 | 西安电子科技大学 | Radio frequency front end transmitting module and phased array radar front end chip |
-
2018
- 2018-03-14 CN CN201820349751.8U patent/CN207882439U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110677169A (en) * | 2019-10-19 | 2020-01-10 | 北京工业大学 | Double-channel voice signal simultaneous transmission transceiver |
| CN111398674A (en) * | 2020-03-30 | 2020-07-10 | 西南科技大学 | Ultra-wideband power level measurement and control circuit |
| CN111398674B (en) * | 2020-03-30 | 2022-05-03 | 西南科技大学 | Ultra-wideband power level measurement and control circuit |
| CN113820666A (en) * | 2021-08-02 | 2021-12-21 | 西安电子科技大学 | Radio frequency front end transmitting module and phased array radar front end chip |
| CN113820666B (en) * | 2021-08-02 | 2024-02-23 | 西安电子科技大学 | Radio frequency front end transmitting module and phased array radar front end chip |
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| CF01 | Termination of patent right due to non-payment of annual fee |
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| CF01 | Termination of patent right due to non-payment of annual fee |