CN2208236Y - Radar used for preventing collide of backward moving vehicle - Google Patents
Radar used for preventing collide of backward moving vehicle Download PDFInfo
- Publication number
- CN2208236Y CN2208236Y CN 95202028 CN95202028U CN2208236Y CN 2208236 Y CN2208236 Y CN 2208236Y CN 95202028 CN95202028 CN 95202028 CN 95202028 U CN95202028 U CN 95202028U CN 2208236 Y CN2208236 Y CN 2208236Y
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- CN
- China
- Prior art keywords
- circuit
- collision avoidance
- avoidance radar
- operational amplifier
- judging
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
- Emergency Alarm Devices (AREA)
Abstract
The utility model provides a radar used for preventing collide of backward moving vehicle, comprising a power circuit. An ultrasonic emission circuit and an ultrasonic receiving circuit are respectively connected with the power circuit, and a distance judge circuit is connected with the ultrasonic emission circuit and the ultrasonic receiving circuit. The distance judge circuit is connected with an alarm circuit. The utility model can make the judge of the long and short range, the sensitivity is high, and the alarm is accurate.
Description
The utility model relates to a kind of reversing automobile collision avoidance radar.
Automobile because driver's backsight condition is very poor, will crash when reversing unless you give your whole attention to it, and its consequence is hardly imaginable.For this reason, people have carried out all research.Circuit in the existing technology has generally all adopted the electronic pulse counter mode to carry out the distance counting, and adopted differentiating circuit in circuit in order to realize the warning to different distance.Because step-by-step counting and differentiating circuit are subject to extraneous interference most, and the priming supply of automobile itself is exactly a powerful interference source, so can cause the circuit instability, the situation of accessible false alarm takes place again and again, and instrument can't normally be used at all; The sensitivity of the ultrasound wave receiving circuit of this instrument or gain are not enough in addition, because the signal attenuation that ultrasound wave is propagated in air is very big, in theory greater than distance increase number square, therefore the obstacle or the too little situation of target of distance is difficult to correct warning to these circuit more than 1 meter surveying, if improve sensitivity or gain, certainly will attract undesired signal again.
In view of above reason, the purpose of this utility model is that a kind of energy is done far, closely judgement, highly sensitive in order to provide, the reversing automobile collision avoidance radar accurately of reporting to the police.
Power circuit is arranged in the utility model, the ultrasound emission circuit that is connected with power circuit respectively, ultrasonic receiving circuit, with the ultrasound emission circuit be connected with ultrasonic receiving circuit apart from decision circuitry, the warning circuit (referring to Fig. 1) that is connected with the distance decision circuitry.
In the above-mentioned ultrasound emission circuit circuit working beat generator is arranged, the modulation signal oscillator that is connected with circuit working beat generator output terminal, the driving circuit that is connected with the modulation signal oscillator, the transmitting probe that is connected with the driving circuit output terminal, in the ultrasonic receiving circuit receiving transducer is arranged, the frequency-selecting amplifier that is connected with receiving transducer, the detection output circuit that is connected with frequency-selecting amplifier, the time control circuit that is connected with circuit working beat generator output terminal is arranged in the distance discrimination circuit, with the time the closely judging circuit that is connected of control circuit and remote judging circuit, the short-distance alarm signal generating circuit and the long-distance alarm signal generating circuit that are connected with remote judging circuit with judging circuit are closely arranged in the warning circuit respectively, with the warning driving circuit that the short-distance alarm signal generating circuit is connected with the long-distance alarm signal generating circuit, the alarming horn (referring to Fig. 2) that is connected with the warning driving circuit.
In the above-mentioned work tempo generator operational amplifier IC1, IC2 are arranged, after the resistance R 1 of series connection and diode D1 and resistance R 2 of connecting and the diode D2 parallel connection one end be connected to the input end of operational amplifier IC1 after capacitor C 2 is connected and the other end is connected to the output terminal (referring to Fig. 2) of operational amplifier IC1.
Reverser (24), (25) (referring to Fig. 2) of direct driving ultrasound emission probe are arranged in the above-mentioned driving circuit, form differential ultrasound emission driving circuit jointly, do not use transformer.
Have in the above-mentioned frequency-selecting amplifier and can form operational amplifier (22) and (23) (referring to Fig. 2) that symmetrical frequency-selecting is amplified.
Have in the above-mentioned closely judging circuit contain integrated package U2 and capacitor C 5 thereof, resistance R 5 near apart from monostable circuit and contain integrated package U4 and the remote monostable circuit (referring to Fig. 2) of capacitor C 7, resistance R 7, closely obstacle is differentiated in closely differentiation time limit pulse with closely monostable circuit generation, produces remote differentiation time limit pulse with remote monostable circuit and differentiates long-distance barrier.
Probe in the utility model is placed on automobile rear, other be placed on appropriate location.No matter far and near, 0.5～2 meter scope, no matter what has influence on safe obstacle such as human body, electric pole, timber, wall, vehicle etc. can both be made right judgement, and be highly sensitive, reports to the police accurately.
Describe embodiment of the present utility model in detail below in conjunction with accompanying drawing:
Fig. 1 is the utility model block diagram.
Fig. 2 is the utility model circuit theory diagrams.
Referring to Fig. 1, ultrasound emission circuit 1 is arranged in the utility model, ultrasonic receiving circuit 2 is apart from decision circuitry 3, warning circuit 4, power circuit 5.Operating voltage is direct current 12V.
Referring to Fig. 2, circuit working beat generator 6, modulation signal oscillator 7 are arranged in the ultrasound emission circuit 1, contain differential ultrasound emission driving circuit 8, the transmitting probe 9 of reverser 24,25.Operational amplifier IC1, IC2 are arranged, capacitor C 2, resistance R 1, R2, diode D1, D2 in the circuit working beat generator 6.In the ultrasonic receiving circuit 2 receiving transducer 19 is arranged, frequency-selecting amplifier 10, detection output circuit 11.Have in the frequency-selecting amplifier 10 and can form the operational amplifier 22,23 that symmetrical frequency-selecting is amplified.Sometimes control circuit 12 in the distance discrimination circuit 3, closely judging circuit 13 and remote judging circuit 14.The monostable circuit 20 that contains integrated package U2 and capacitor C 5 thereof, resistance R 5 is closely arranged in the judging circuit 13, the monostable circuit 21 that contains integrated package U4 and capacitor C 7 thereof, resistance R 7 is arranged in the remote judging circuit 14.Warning circuit 4 has middle short-distance alarm signal generating circuit 15 and long-distance alarm signal generating circuit 16, driving circuit 17, alarming horn 18.
During work, circuit beat generator 6 is output control pulse periodically, transport to modulation signal oscillator 7 on the one hand and produce transponder pulse, transport to the time control circuit 12 in the distance discrimination circuit 3 on the other hand, the transponder pulse that modulation signal oscillator 7 produces exports transmitting probe 9 to through driving circuit 8 and finishes hyperacoustic emission.Receiving transducer 19 is delivered to frequency-selecting amplifier 10 after receiving the reflection echo of obstacle, forms behind detection output circuit 11 and delivers to distance discrimination circuit 3 apart from echo-pulse.Send gating pulse with distance discrimination circuit 3 by circuit beat generator 6, through the time start closely judging circuit 13 behind the control circuit 12, if in 1 meter scope, obstacle is arranged, the echoed signal of being sent here by detection output circuit 11 will start short-distance alarm signal generating circuit 15 and produce alerting signals, and this signal is finished short-distance alarm through the warning driving circuit 17 alert loudspeaker 18 of delivering newspaper.If accessible in 1 meter scope, remote judging circuit 14 will be activated to differentiate and have or not remote echo, if any, then promptly finish long-distance alarm by long-distance alarm signal generating circuit 16, warning driving circuit 17 and alarming horn 18.If circuit will not reported to the police, and treat to restart differentiation work after work tempo generator 6 produces next round work gating pulse not closely and remote echo.
Claims (6)
1, reversing automobile collision avoidance radar, it is characterized in that power circuit (5) is arranged in the described collision avoidance radar, the ultrasound emission circuit (1) that is connected with power circuit respectively, ultrasonic receiving circuit (2), with the ultrasound emission circuit be connected with ultrasonic receiving circuit apart from decision circuitry (3), the warning circuit (4) that is connected with distance decision circuitry (3).
2, reversing automobile collision avoidance radar as claimed in claim 1, it is characterized in that circuit working beat generator (6) is arranged in the described ultrasound emission circuit (1), the modulation signal oscillator (7) that is connected with circuit working beat generator output terminal, the driving circuit (8) that is connected with the modulation signal oscillator, the transmitting probe (9) that is connected with the driving circuit output terminal, receiving transducer (19) is arranged in the ultrasonic receiving circuit (2), the frequency-selecting amplifier (10) that is connected with joint probe (19), put the detection output circuit (11) that device is connected with frequency-selecting, apart from the time control circuit (12) that is connected with circuit working beat generator (6) output terminal is arranged in the decision circuitry (3), with the time the closely judging circuit (13) that is connected of control circuit and remote judging circuit (14), the short-distance alarm signal generating circuit (15) and the long-distance alarm signal generating circuit (16) that are connected with remote judging circuit with judging circuit are closely arranged in the warning circuit (4) respectively, with the warning driving circuit (17) that the short-distance alarm signal generating circuit is connected with the long-distance alarm signal generating circuit, the alarming horn (18) that is connected with the warning driving circuit.
3, reversing automobile collision avoidance radar as claimed in claim 2, it is characterized in that in the described circuit working beat generator (6) operational amplifier IC1, IC2 being arranged, after the resistance R 1 of series connection and the resistance R 2 of diode D1 and series connection and the diode D2 parallel connection one end be connected to the input end of operational amplifier IC1 after capacitor C 2 is connected and the other end is connected to the output terminal of operational amplifier IC1.
4, reversing automobile collision avoidance radar as claimed in claim 2 is characterized in that reverser (24), (25) that can directly drive transmitting probe are arranged in the described driving circuit (8).
5, reversing automobile collision avoidance radar as claimed in claim 2 is characterized in that having in the described frequency-selecting amplifier (10) forming operational amplifier (22) and the operational amplifier (23) that symmetrical frequency-selecting is amplified.
6, reversing automobile collision avoidance radar as claimed in claim 2, it is characterized in that having in the described closely judging circuit (13) monostable circuit (20) that contains integrated package U2 and capacitor C 5 thereof, resistance R 5, the monostable circuit (21) that contains integrated package U4 and capacitor C 7, resistance R 7 is arranged in the remote judging circuit (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95202028 CN2208236Y (en) | 1995-02-28 | 1995-02-28 | Radar used for preventing collide of backward moving vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95202028 CN2208236Y (en) | 1995-02-28 | 1995-02-28 | Radar used for preventing collide of backward moving vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2208236Y true CN2208236Y (en) | 1995-09-20 |
Family
ID=33855300
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95202028 Expired - Fee Related CN2208236Y (en) | 1995-02-28 | 1995-02-28 | Radar used for preventing collide of backward moving vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2208236Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108284790A (en) * | 2017-01-08 | 2018-07-17 | 长沙乐昌林电子科技有限公司 | A kind of reversing automobile proximity warner |
-
1995
- 1995-02-28 CN CN 95202028 patent/CN2208236Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108284790A (en) * | 2017-01-08 | 2018-07-17 | 长沙乐昌林电子科技有限公司 | A kind of reversing automobile proximity warner |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |