CN202486996U - Curve speed early warning system based on RFID - Google Patents
Curve speed early warning system based on RFID Download PDFInfo
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- CN202486996U CN202486996U CN2012200199346U CN201220019934U CN202486996U CN 202486996 U CN202486996 U CN 202486996U CN 2012200199346 U CN2012200199346 U CN 2012200199346U CN 201220019934 U CN201220019934 U CN 201220019934U CN 202486996 U CN202486996 U CN 202486996U
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- rfid
- early warning
- control chip
- warning system
- system based
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Abstract
The utility model discloses a curve speed early warning system based on RFID, comprising a vehicle unit and a roadbed unit. The vehicle unit comprises a CAN bus, a nixie tube, a buzzer, a control chip and a RFID reader; the roadbed unit comprises a RFID label stored with curve data information. The CAN bus is in connection with the control chip which is in connection with the nixie tube and the buzzer; the RFID reader is in bidirectional connection with the control chip; the RFID reader is in communication with the RFID label. The curve speed early warning system based on RFID can read curve information stored in the RFID label before a vehicle enters a curve and alarms in advance if potential safety hazards exist, thus can obviously reduce accident rate and is especially suitable for city multisection continuous curves, highways, etc.
Description
Technical field
The utility model relates to intelligent transportation field, particularly a kind of bend speed of a motor vehicle early warning system based on RFID.
Background technology
Automobile too high meeting of the speed of a motor vehicle when getting into bend causes breaks away or rollover; Launched research with regard to bend speed of a motor vehicle early warning mechanism both at home and abroad; Present main solution is to rely on GPS and high-precision electronic chart; The safety early warning for track curve and the driving recording method that like the patent No. are the navigational system of 200410081844.X can combine electronic chart early warning before getting into the bend prerequisite; But, also need with the road conditions high-precision electronic chart that upgrades in time in many bends area gps signal validity susceptible to such as bridge, buildings are intensive; The patent No. is 200910158546.9 dynamic detection method for preventing wagon from turning towards one side on bending road and prior-warning device, can only be after vehicle gets into bend fully perception track degree of tilt, vehicle side acceleration etc., can't give warning in advance; Need install additional than multisensor simultaneously, be unfavorable for cost control.
The utility model content
The utility model technical matters to be solved is, and is not enough to prior art, and a kind of bend speed of a motor vehicle early warning system based on RFID is provided, and for automobile provides early warning during the higher speed of a motor vehicle on crankcase ventilaton, prevents and breaks away and traffic hazard such as rollover.
For solving the problems of the technologies described above; The technical scheme that the utility model adopted is: a kind of bend speed of a motor vehicle early warning system based on RFID; Comprise board units and roadbed unit, board units comprises CAN bus, charactron, hummer, control chip, RFID reader, and the roadbed unit comprises the RFID label that stores the bend data message; The CAN bus inserts control chip; Control chip is connected with charactron, hummer, and the RFID reader is connected with control chip is two-way, RFID reader and RFID label communication.
Control chip can be various microprocessors such as single-chip microcomputer, ARM, DSP.
Said charactron is the LED charactron.
The bend speed of a motor vehicle early warning system of the utility model can be before vehicle gets into bend; Read the bend information that is stored in the road RFID label; If exist potential safety hazard then to report to the police in advance, can obviously reduce accident rate, especially be fit to city multistage continuous bend road and highway etc.
Description of drawings
Fig. 1 is the bend speed of a motor vehicle early warning system structured flowchart of the utility model one embodiment based on RFID;
The method flow diagram that Fig. 2 carries out the bend early warning for the utility model one embodiment bend speed of a motor vehicle early warning system;
Fig. 3 is the utility model one embodiment STC89C52 singlechip control chip circuit theory diagrams.
Embodiment
As shown in Figure 1; The utility model one embodiment comprises board units and roadbed unit, and board units comprises CAN bus, charactron, hummer, control chip, RFID reader, and the roadbed unit comprises the RFID label that stores the bend data message; The CAN bus inserts control chip; Control chip is connected with charactron, hummer, and the RFID reader is connected with control chip is two-way, RFID reader and RFID label communication.
Board units makes it send the electromagnetic wave of reading the RFID label through control RFID readers such as RS232 serial ports or SPI interfaces, and the RFID label in the roadbed unit receives and starts behind the electromagnetic wave and send built-in curve ahead data to the RFID reader.After obtaining the curve ahead data, control chip is according to the quasistatic rollover principle of the tire adhesion coefficient and the rigidity automobile of road ahead, and detection rain brush switching signal, calls the tire adhesion coefficient of the recommendation under the different weather.Safe speed of a motor vehicle threshold value V in the time of can calculating defective steering stabilizer through bend parameters such as tire adhesion coefficient and bend curvature, superelevation amounts
S, and this velocity amplitude is presented in the digital fluorescent tube of LED.The speed of a motor vehicle on monitoring the CAN bus is then carried out grading forewarning system according to current vehicle speed V with from information such as bend inlet distances through hummer during greater than safety speed of a motor vehicle threshold value.Grading forewarning system judges according to getting into the required car deceleration degree value of bend, as required deceleration value a less than comfortable retarded velocity threshold value (like 2.5m/s
2) time start general early warning; Greater than comfortable retarded velocity threshold value (like 2.5m/s
2) time, start urgent early warning.
Comprising information in the RFID label in the roadbed unit has: the distance B of current RFID label and curve ahead porch, bend superelevation amount
Bend maximum curvature ρ, tire adhesion coefficient μ under the normal weather
1, tire adhesion coefficient μ under the rainy weather
2Deng.
Bend safety speed of a motor vehicle threshold value
wherein
It is μ that tire is recommended attachment coefficient μ
1Or μ
2When not detecting rain brush on the CAN bus and open signal, tire recommends attachment coefficient to adopt μ
1Otherwise adopt μ
2, g is an acceleration of gravity.
Brake required retarded velocity
wherein V be the vehicle current vehicle speed that comes from the CAN bus; Vs is safe speed of a motor vehicle threshold value; T is the preceding reaction time for the driver brakes, and generally got 0.75～1 second.
General span: g gets 9.8m/s
2The distance B span of label and curve ahead porch is 100～200m; Highway bend maximum curvature ρ span is 0.0005/m～0.00272/m; Tire is recommended attachment coefficient μ under the normal weather
1Be 0.75～0.9, tire is recommended attachment coefficient μ under the rainy weather
2Be 0.5～0.7, comfortable retarded velocity is generally got 1.5m/s
2～2.5m/s
2
The utility model one embodiment bend speed of a motor vehicle early warning system is carried out the method flow diagram of bend early warning and is seen Fig. 2.
Control chip adopts the STC89C52 single-chip microcomputer in the present embodiment, and its circuit theory diagrams are seen Fig. 3.
Claims (3)
1. the bend speed of a motor vehicle early warning system based on RFID comprises board units and roadbed unit, it is characterized in that; Board units comprises CAN bus, charactron, hummer, control chip, RFID reader; The roadbed unit comprises the RFID label that stores the bend data message, and the CAN bus inserts control chip, and control chip is connected with charactron, hummer; The RFID reader is connected with control chip is two-way, RFID reader and RFID label communication.
2. the bend speed of a motor vehicle early warning system based on RFID according to claim 1 is characterized in that said control chip is the STC89C52 single-chip microcomputer.
3. the bend speed of a motor vehicle early warning system based on RFID according to claim 1 is characterized in that said charactron is the LED charactron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200199346U CN202486996U (en) | 2012-01-17 | 2012-01-17 | Curve speed early warning system based on RFID |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200199346U CN202486996U (en) | 2012-01-17 | 2012-01-17 | Curve speed early warning system based on RFID |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202486996U true CN202486996U (en) | 2012-10-10 |
Family
ID=46961401
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200199346U Expired - Fee Related CN202486996U (en) | 2012-01-17 | 2012-01-17 | Curve speed early warning system based on RFID |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202486996U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102568232A (en) * | 2012-01-17 | 2012-07-11 | 湖南大学 | System for prewarning vehicle speed on bent roads based on radio frequency identification (RFID) |
| CN107564296A (en) * | 2017-09-11 | 2018-01-09 | 安徽实运信息科技有限责任公司 | A kind of car speed early warning system based on condition of road surface |
| CN108169507A (en) * | 2017-12-07 | 2018-06-15 | 浙江工业大学 | A kind of high-speed mobile car speed Forecasting Methodology based on RFID system Polynomial Estimation |
| CN110533960A (en) * | 2019-09-03 | 2019-12-03 | 福建工程学院 | A kind of interim double method and system dodged when serving as automobile stagnation of movement |
-
2012
- 2012-01-17 CN CN2012200199346U patent/CN202486996U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102568232A (en) * | 2012-01-17 | 2012-07-11 | 湖南大学 | System for prewarning vehicle speed on bent roads based on radio frequency identification (RFID) |
| CN102568232B (en) * | 2012-01-17 | 2014-08-13 | 湖南大学 | System for prewarning vehicle speed on bent roads based on radio frequency identification (RFID) |
| CN107564296A (en) * | 2017-09-11 | 2018-01-09 | 安徽实运信息科技有限责任公司 | A kind of car speed early warning system based on condition of road surface |
| CN108169507A (en) * | 2017-12-07 | 2018-06-15 | 浙江工业大学 | A kind of high-speed mobile car speed Forecasting Methodology based on RFID system Polynomial Estimation |
| CN108169507B (en) * | 2017-12-07 | 2020-02-21 | 浙江工业大学 | High-speed moving vehicle speed prediction method based on RFID system polynomial estimation |
| CN110533960A (en) * | 2019-09-03 | 2019-12-03 | 福建工程学院 | A kind of interim double method and system dodged when serving as automobile stagnation of movement |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121010 Termination date: 20150117 |
|
| EXPY | Termination of patent right or utility model |