CN203472669U - Pre-warning system for low speed automobile rear collisions on city roads - Google Patents
Pre-warning system for low speed automobile rear collisions on city roads Download PDFInfo
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- CN203472669U CN203472669U CN201320228628.8U CN201320228628U CN203472669U CN 203472669 U CN203472669 U CN 203472669U CN 201320228628 U CN201320228628 U CN 201320228628U CN 203472669 U CN203472669 U CN 203472669U
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Abstract
This utility model relates to a pre-warning system for low speed automobile rear collisions on city roads, comprising a single-chip microcomputer for analyzing various signals and controlling the pre-warning, an ultrasonic emitter and an ultrasonic receiver which are positioned in the front end of the automobile, a wheel speed sensor installed on the back wheel, a buzzer and an indication lamp which are arranged on an instrument board in the cab for pre-warning prompt when the rear collision is close to happen. The ultrasonic emitter is connected to the output terminal P0 of the single-chip microcomputer; the ultrasonic receiver is connected to the input terminal T0 of the single-chip microcomputer; the wheel speed sensor is connected to the input terminal T7of the single-chip microcomputer; the buzzer is connected to the output terminal P1 of the single-chip microcomputer; and the indication lamp is connected to the output terminal P1 of the single-chip microcomputer. In the running process of the automobile, the pre-warning system for low speed automobile rear collisions on city roads performs on-time measurement of distance and velocity, calculates the safety distance preventing rear collision with the ahead automobile, warns the driver when the distance between two vehicles is too close, and prevents dangers from happening.
Description
Technical field
The utility model relates to a kind of a set of warning device of knocking into the back avoided that improves that safe driving sets up for automobile, the low-speed cars that is particularly the applicable to urban highway forewarn system that knocks into the back.
Background technology
In current city, jam situation is very serious.Even restrict driving and still can not solve well the problem of blocking up according to license plate number.And under the environment that blocks up, it is very slow that vehicle can travel, loiter, wait sometimes upper several traffic lights to pass through, under these circumstances, driver is easy to produce tired, and attention can decline greatly, is easy to occur rear-end collision.Although such rear-end collision is unlikely to cause very large personal casualty and property damage, can increase the weight of undoubtedly the burden of blocking up of urban highway.Based on a kind of like this city background of blocking up, the failure-free forewarn system that knocks into the back is installed on automobile, provide a kind of failure-free sound and indicator lamp early warning under dangerous situation seem especially important.
Summary of the invention
The purpose of this utility model is to provide a kind of low-speed cars that is applicable to urban highway forewarn system that knocks into the back, this system is in vehicle traveling process, in real time front vehicles is carried out the measurement of distance, the speed of a motor vehicle, to also carrying out velocity measurement from car, according to kinematic principle, can calculate and avoid the safety distance that knocks into the back with front truck, at two car actual distances close to safety distance time, chaufeur is carried out to alarm, to prevent dangerous generation, for the driving safety of automobile provides failure-free guarantee.
The low-speed cars that the utility model the is applicable to urban highway forewarn system that knocks into the back, comprise the micro controller system for various signal analysis, control early warning, be arranged on car body front end for launching the ultrasonic transmitter of ultrasonic signal and for receiving the ultrasonic receiver that returns to ultrasonic signal, be arranged on automobile back wheel place for measuring the wheel speed sensors from vehicle speed, be arranged on bridge instrumentation dish for pointing out and approach buzzer phone and the indicator lamp that carries out early warning while knocking into the back; Described ultrasonic transmitter is connected with micro controller system output port P0, ultrasonic receiver is connected with micro controller system input port T0, wheel speed sensors is connected with micro controller system input port T7, and buzzer phone is connected with micro controller system output port P1, and indicator lamp is connected with micro controller system output port P1.
In described micro controller system, store test and control program, realization comprises: 1) reading of the triggering of ultrasonic signal and echoed signal, and calculate the distance of front truck; 2) by wheel speed sensors read signal, also judged from vehicle speed; 3) according to judging whether to collide with front truck from vehicle speed with from car and leading vehicle distance, and according to hazard level trigger alarm buzzer phone or indicator lamp.
The knock into the back principle of work of forewarn system of the low-speed cars that the utility model is applicable to urban highway is: by ultrasonic transduter, measured in real time from the distance of car and front truck with from the gait of march of car, and by program, calculated the critical safe distance knocking into the back with front truck, in reality in the time that car and leading vehicle distance approach this safety distance trigger alarm signal prompt chaufeur.
The utility model adopts high-precision ultrasonic measurement mechanism and 16 s' intelligent micro controller system, can carry out quickly and accurately distance and velocity measurement, real-time is high, and give certain safety factor, before borderline risk situation, can carry out sound and indicator lamp early warning timely and effectively to chaufeur, make chaufeur have the time of enough abundances to take corresponding safety measure, the generation avoiding traffic accident, also reduces personal casualty and property damage to greatest extent.
Accompanying drawing explanation
Fig. 1 is that the utility model system element is arranged schematic diagram;
Fig. 2 is the utility model block diagram of system.
The specific embodiment
The embodiment providing below in conjunction with accompanying drawing is described in further detail the utility model.
With reference to Fig. 1, Fig. 2, a kind of low-speed cars that is applicable to urban highway forewarn system that knocks into the back, comprise the micro controller system 1 for various signal analysis, control early warning, be arranged on car body front end airflow grid place for launching the ultrasonic transmitter 2 of ultrasonic signal and for receiving the ultrasonic receiver 3 that returns to ultrasonic signal, be arranged on automobile back wheel place for measuring the wheel speed sensors 4 from vehicle speed, be arranged on bridge instrumentation dish for pointing out and approach buzzer phone 5 and the indicator lamp 6 that carries out early warning while knocking into the back; Described ultrasonic transmitter 2 is connected with micro controller system 1 output port P0, ultrasonic receiver 3 is connected with micro controller system 1 input port T0, wheel speed sensors 4 is connected with micro controller system 1 input port T7, buzzer phone 5 is connected with micro controller system 1 output port P1, and indicator lamp 6 is connected with micro controller system 1 output port P1.
Described micro controller system 1 adopts 16 micro controller systems of Freescale, is installed in a metal box, in this micro controller system
In the time that two car actual distances are less than safety distance soon, the indicator lamp in gauge panel and buzzer phone can carry out early warning simultaneously, and alerting drivers is taked corresponding safety measure, avoids the generation of accident.
Specific works process of the present utility model is as follows:
After vehicle launch, the utility model is started working, and carries out after system initialization, and 4 pairs of wheel speed sensors are measured from vehicle speed V1, and ultrasonic transmitter 2 and receptor 3 collaborative works, measure leading vehicle distance D.The signal recording is transferred to micro controller system 1 and after micro controller system is processed, can obtains front vehicle speed V0.Now micro controller system judges, if V1<V0, front vehicle speed is greater than from car, and this secondary program stops, and two cars are comparatively safe, can not knock into the back, and then returns to initialization and carries out measurement next time; If V1>V0, two cars may knock into the back, and need micro controller system further to calculate and consider safety factor, draw the minimum safe distance S of two cars under this relative velocity.If S<D, this secondary program stops, and two cars are comparatively safe, can not knock into the back, and then returns to initialization and carries out measurement next time; If S>D, trigger alarm, micro controller system output high level impels indicator lamp 6 and buzzer phone 5 to report to the police, and time delay two seconds, and prompting chaufeur is taked corresponding safety measure, avoids the generation of accident.After time delay finishes, again enter system initialization, start working cycle next time.
Claims (2)
1. a low-speed cars that the is applicable to urban highway forewarn system that knocks into the back, it is characterized in that: comprise the micro controller system (1) for various signal analysis, control early warning, be arranged on car body front end for launching the ultrasonic transmitter (2) of ultrasonic signal and returning to the ultrasonic receiver (3) of ultrasonic signal for receiving, be arranged on automobile back wheel place for measuring the wheel speed sensors (4) from vehicle speed, be arranged on bridge instrumentation dish for pointing out and approach buzzer phone (5) and the indicator lamp (6) that carries out early warning while knocking into the back; Described ultrasonic transmitter (2) is connected with micro controller system (1) output port P0, ultrasonic receiver (3) is connected with micro controller system (1) input port T0, wheel speed sensors (4) is connected with micro controller system (1) input port T7, buzzer phone (5) is connected with micro controller system (1) output port P1, and indicator lamp (6) is connected with micro controller system (1) output port P1.
2. a low-speed cars that the is applicable to urban highway forewarn system that knocks into the back, it is characterized in that, in described micro controller system (1), store test and control program, realization comprises: 1) reading of the triggering of ultrasonic signal and echoed signal, and calculate the distance of front truck; 2) by wheel speed sensors read signal, also judged from vehicle speed; 3) according to judging whether to collide with front truck from vehicle speed with from car and leading vehicle distance, and according to hazard level trigger alarm buzzer phone or indicator lamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320228628.8U CN203472669U (en) | 2013-04-28 | 2013-04-28 | Pre-warning system for low speed automobile rear collisions on city roads |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320228628.8U CN203472669U (en) | 2013-04-28 | 2013-04-28 | Pre-warning system for low speed automobile rear collisions on city roads |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203472669U true CN203472669U (en) | 2014-03-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320228628.8U Expired - Fee Related CN203472669U (en) | 2013-04-28 | 2013-04-28 | Pre-warning system for low speed automobile rear collisions on city roads |
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| CN (1) | CN203472669U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104134361A (en) * | 2014-07-02 | 2014-11-05 | 清华大学 | Driving status feedback method and system and vehicle-mounted device internally provided with system |
| CN104670087A (en) * | 2015-02-04 | 2015-06-03 | 深圳市航盛电子股份有限公司 | Forward anti-collision early-warning method based on ultrasonic sensor |
-
2013
- 2013-04-28 CN CN201320228628.8U patent/CN203472669U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104134361A (en) * | 2014-07-02 | 2014-11-05 | 清华大学 | Driving status feedback method and system and vehicle-mounted device internally provided with system |
| CN104670087A (en) * | 2015-02-04 | 2015-06-03 | 深圳市航盛电子股份有限公司 | Forward anti-collision early-warning method based on ultrasonic sensor |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140312 Termination date: 20160428 |