CN204375168U - A kind of vehicle bend overspeed warning device tested the speed based on ultrasound wave - Google Patents
A kind of vehicle bend overspeed warning device tested the speed based on ultrasound wave Download PDFInfo
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- CN204375168U CN204375168U CN201520104950.9U CN201520104950U CN204375168U CN 204375168 U CN204375168 U CN 204375168U CN 201520104950 U CN201520104950 U CN 201520104950U CN 204375168 U CN204375168 U CN 204375168U
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Abstract
A kind of vehicle bend overspeed warning device tested the speed based on ultrasound wave, it comprises the first main control chip and the second main control chip, the input port of the first main control chip is connected with distance measuring sensor, Temperature Humidity Sensor respectively, the delivery outlet of the first main control chip respectively with the first display module, first communication module, early warning signal generation model calling; The input port of the second main control chip is connected with second communication module, delivery outlet is connected with the second display module; Second main control chip is connected with host computer, and first communication module is connected with second communication module.The utility model effectively can solve and cause owing to lacking necessary prompting the problem that road safety accident occurs when automobile is crossed curved.
Description
Technical field
The utility model belongs to electronic device field, is specifically related to a kind of vehicle bend overspeed warning device tested the speed based on ultrasound wave.
Background technology
Road curve place is always the multiple part of traffic hazard, at highway, brink of precipice and the straight way of paddling in the roads such as section and bend intersection, owing to being subject to that sight line is unopen, road is wet and slippery and the impact of the factor such as self driving condition, driver is easy to drive over the speed limit, thus exceed maximum enter curved speed, after entering bend, go out the dangerous situation of bend.
Lack specially for the bend overspeed warning device that vehicle travels in current all kinds of road, the attention that warning mark or speed(-)limit sign fully cannot cause driver is set in accident-prone road section, vehicle safe driving speed and maximum safety enter the impact that curved speed is subject to the factors such as driver state, ground friction coefficient, weather condition and air humidity, single restriction F-Zero cannot meet on-the-spot changeable weather condition and condition of road surface, cannot reduce road curve place accident rate further.
Utility model content
Technical problem to be solved in the utility model is for above-mentioned the deficiencies in the prior art, and a kind of vehicle bend overspeed warning device tested the speed based on ultrasound wave provided, it effectively can solve and cause owing to lacking necessary prompting the problem that road safety accident occurs when automobile is crossed curved.
The object of utility model is achieved in that
A kind of vehicle bend overspeed warning device tested the speed based on ultrasound wave, it comprises the first main control chip and the second main control chip, the input port of the first main control chip is connected with distance measuring sensor, Temperature Humidity Sensor respectively, the delivery outlet of the first main control chip respectively with the first display module, first communication module, early warning signal generation model calling; The input port of the second main control chip is connected with second communication module, delivery outlet is connected with the second display module; Second main control chip is connected with host computer, and first communication module is connected with second communication module.
The singlechip chip of described first main control chip and the second main control chip to be model be ATMEGA16, the model of Temperature Humidity Sensor is SHT10, first display module comprises LCD display, and the input port of the first main control chip is connected with Temperature Humidity Sensor respectively with delivery outlet, LCD display connects; Distance measuring sensor comprises STC11 chip, and STC11 chip is connected with level transferring chip and signal amplifier respectively; First communication module and second communication module comprise radio transmitting and receiving chip.
Described signal amplifier comprises TL074 chip, and level transferring chip is MAX232 chip, and radio transmitting and receiving chip is Nrf24L01 chip.
Described second display module is LED or LCD display.
Described host computer is computer.
Described distance measuring sensor is ultrasonic distance-measuring sensor.
Described level transferring chip is connected with the first loudspeaker, and signal amplifier is connected with the second loudspeaker.
The utility model achieves following technique effect:
Adopt said structure, the utility model can obtain in real time vehicle enter curved before travel speed, and according to the road conditions of reality and weather condition calculate in real time maximum enter curved safe speed, coordinate display module, early warning signal generation module and wireless communication module, driver's reduction of speed is reminded when overspeed of vehicle, and relevant vehicle traveling information is fed back to vehicle supervision department, reduce accident rate further, guarantee the safety traffic of vehicle;
In the utility model, sensor assembly comprises distance measuring sensor and humidity sensor, is respectively used to the distance and the present air humidity that obtain front vehicles distance sensor; First main control chip in order to calculate vehicle and enter the travel speed before bend and maximum safety enters curved speed, and drives other modules; Early warning signal generation module is in order to send early warning signal when overspeed of vehicle being detected; Display module enters the real time datas such as curved speed, Vehicle Speed and air humidity in order to show maximum safety; Communication module in order to maximum safety to be entered curved speed, whether Vehicle Speed, vehicle exceed the speed limit and the information such as air humidity is sent to the traffic console that vehicle supervision department is arranged on far-end.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is described in further detail:
Fig. 1 is system chart of the present utility model;
Fig. 2 is the circuit diagram of distance measuring sensor in Fig. 1;
Fig. 3 is the circuit diagram of first communication module and second communication module in Fig. 1;
Fig. 4 is the circuit diagram of the on-the-spot terminal circuit of the utility model;
Fig. 5 is the circuit diagram of the utility model remote circuitry.
Embodiment
A kind of vehicle bend overspeed warning device tested the speed based on ultrasound wave as shown in Figure 1, it comprises the first main control chip 1 and the second main control chip 2, the input port of the first main control chip 1 is connected with distance measuring sensor 3, Temperature Humidity Sensor 4 respectively, and the delivery outlet of the first main control chip 1 is connected with the first display module 5, first communication module 6, early warning signal generation module 7 respectively; The input port of the second main control chip 2 is connected with second communication module 8, delivery outlet is connected with the second display module 9; Second main control chip 2 is connected with host computer 10; First communication module 6 is connected with second communication module 8.
Described first main control chip 1 and the second main control chip 2 for model be the singlechip chip of ATMEGA16, the model of Temperature Humidity Sensor 4 is SHT10, first display module 5 comprises LCD display, and the input port of the first main control chip 1 is connected with Temperature Humidity Sensor respectively with delivery outlet, LCD display connects;
Distance measuring sensor 3 comprises STC11 chip 301, STC11 chip 301 and is connected with level transferring chip 302 and signal amplifier 303 respectively;
First communication module 6 and second communication module 8 comprise radio transmitting and receiving chip 11.
Described signal amplifier 303 comprises TL074 chip, and level transferring chip 302 is MAX232 chip, and radio transmitting and receiving chip 11 is Nrf24L01 chip.
Described second display module 9 is LED or LCD display.
Described host computer is computer.
Described distance measuring sensor 3 is ultrasonic distance-measuring sensor.
Described level transferring chip 302 is connected with the first loudspeaker 12, and signal amplifier 303 is connected with the second loudspeaker 13.
Preferably, as shown in Figure 4, early warning signal generation module is made up of triode 701, resistance and hummer 702, and a pin of hummer connects 5V power supply.Triode 701 is connected with the PD4 pin of the first main control chip 1, and when PD4 exports high level, triode 701 conducting, makes to produce electric potential difference, hummer sounding between hummer 702 liang of pins; During PD4 output low level, triode 701 disconnects, and hummer stops sounding.
As shown in Figure 2, wherein STC11 chip is a microcontroller, for controlling transmission and the detecting ultrasonic ripple signal of ultrasonic signal.MAX232 chip be single supply level transferring chip be used for boosting drive ultrasonic probe.TL074 chip is a low-noise operational amplifier, is used for amplifying Received signal strength.When trig receive a width more than the high impulse of 10uS after, STC11 chip controls P53 pin sets low, then 40KHz pulse signal is exported by P51 and P52 pin, this signal amplifies rear drive ultrasonic probe by MAX232 and sends ultrasound wave, after signal is sent completely, P67 is set high, P61 pin sets low, and waits for echo.After ultrasound wave receiving transducer receives echo, reception amplifying circuit just exports the first passage homophase input port of the Received signal strength after amplification to TL074, and make triode ON, P60 now becomes low, STC11 detects that Echo pin just sets low by this change, represents and has received echo.The high level lasting time of Echo mouth is the time delay that ultrasound wave is sent to reception, measures this time by the timer of the first main control chip, can calculate the distance between measured object and probe.
As shown in Figure 3, the function of this circuit is used for carrying out wireless transmission between the scene end and far-end of device.The nRF24L01 radio transmitting and receiving chip that wireless transmission circuit adopts NORDIC company to produce, this chip operation is in the ISM band of 2.4GHz to 2.5GHz.This chip power-consumption is extremely low, mainly contain 4 kinds of mode of operations: receiving mode, sending mode, standby mode, power-down mode, when being operated in that under emission mode, emissive power is 0dBm, current drain is 11.3mA, be 12.3mA during receiving mode, under power-down mode and standby mode, current drain is less than 1mA.This circuit is by nRF24L01, and 8 electric capacity, 2 resistance, 3 inductance, 1 crystal oscillator and antenna form.1 to No. 6 pins of nRF24L01 are connected with PB1, PB0, PB7, PB6, PB5, PB2 pin of ATMEGA16 singlechip chip respectively, carry out data transmission by SPI protocol.ATMEGA16 singlechip chip carries out transceiving data, the control such as standby by SPI to nRF24L01.
As shown in Figure 4, PB1, PB0, PB7, PB6, PB5, PB2 pin of the first main control chip ATMEGA16 single-chip microcomputer is connected with wireless communication module, communicate with SPI protocol, Temperature Humidity Sensor SHT10 can obtain the temperature and humidity under current environment, first main control chip ATMEGA16 provides work clock by PA1 to SHT10, and by the reading of PA0 by data one wherein.PD2 with PD3 is connected respectively at trig and the echo pin of ultrasonic distance measuring module as the pin of ATMEGA16 internal interrupt device, when ultrasound wave transmitting with when returning, trig and echo produces a rising edge saltus step respectively, triggering corresponding pin interrupts, in interrupt routine, counter is set, the time interval △ t between rising edge saltus step can be obtained by the difference calculating rolling counters forward between two rising edges, then be multiplied by the distance that velocity of sound just obtains according to front vehicles.When being greater than maximum safety according to the vehicle traveling rugosity obtained and entering curved speed, PD4 pin drives the hummer BUZ1 in early warning signal generation module to send early warning signal, on data disaply moudle by showing Vehicle Speed in real time, maximum safety enters the information such as curved speed and air humidity.
As shown in Figure 5, wherein PD0 and the PD1 respectively reception pin of corresponding second main control chip ATMEGA16 single-chip microcomputer in serial communication and transmit pin, PD0 is connected with the transmit pin of host computer serial ports, PD1 is connected with the reception pin of host computer serial ports, so just can realize ATMEGA16 and and host computer between serial communication, the data received by wireless communication module by serial communication ATMEGA16 pass to host computer.
Adopt said structure, during use, the distance measuring sensor 3 of on-the-spot for the utility model end portion and Temperature Humidity Sensor are installed in bend porch and bend respectively, such the utility model can obtain in real time vehicle enter curved before travel speed, and according to the road conditions of reality and weather condition calculate in real time maximum enter curved safe speed, coordinate display module, early warning signal generation module and wireless communication module, driver's reduction of speed is reminded when overspeed of vehicle, and relevant vehicle traveling information is fed back to vehicle supervision department, further reduction accident rate, guarantee the safety traffic of vehicle,
In the utility model, sensor assembly comprises distance measuring sensor and humidity sensor, is respectively used to the distance and the present air humidity that obtain front vehicles distance sensor; First main control chip in order to calculate vehicle and enter the travel speed before bend and maximum safety enters curved speed, and drives other modules; Early warning signal generation module is in order to send early warning signal when overspeed of vehicle being detected; Display module enters the real time datas such as curved speed, Vehicle Speed and air humidity in order to show maximum safety; Communication module in order to maximum safety to be entered curved speed, whether Vehicle Speed, vehicle exceed the speed limit and the information such as air humidity is sent to the traffic console that vehicle supervision department is arranged on far-end, second main control chip 2 of distal portions first reads the data that second communication module receives from first communication module, then imports data into host computer by serial communication and preserves.
If the measurement of t1 moment ultrasonic wave module obtain distance front vehicles distance be L1, t2 moment measurements obtain distance front vehicles distance be L2, then between t1 to t2 vehicle traveling average velocity can be expressed as:
V＝|L
1-L
2|÷(t
2-t
1)
Interval between t2 and t1 can be got little as far as possible, improves accuracy and the real-time of Vehicle Speed by reducing range observation interval.
Humidity sensor is in order to measure the current air humidity near road surface, and its measurement result can export with the form of percentage, and within the specific limits, air humidity RH% and surface friction coefficient μ is roughly linear:
Vehicle provides centripetal force when crossing bend primarily of friction force f, and f=mg μ, wherein m and g is respectively quality and the local gravitational acceleration of vehicle.Just can show that the maximum safety of vehicle enters curved speed according to related physical knowledge.Constant a and b can at local measurement f and RH% and draw they relation curve obtain.
This patent data processing module is ATMEGA16 single-chip microcomputer, is divided into on-the-spot end data processing module and remote data processing module, and the function of the data processing module of on-the-spot end is as follows.1, other modules be attached thereto are driven; 2, the data of ultrasonic distance-measuring sensor and humidity sensor output are received, and calculate Vehicle Speed and maximum safety enters curved speed, bend equivalence is become one section of circular arc, if its equivalent redius is r, by the relevant knowledge about centripetal force in physics, vehicle is not when entering curved to go out bend, then its travel speed V should meet:
Actual maximum safety enters curved speed should enter the K of curved speed doubly for the maximum safety of theory α coefficient, that is:
K is the safety factor of this section vehicle safe driving, and by the impact of weather condition and the factor such as driver's driving ability and reaction time, general K≤1, K value draws after can carrying out statistical study by traffic department to the travel speed of this section accident vehicle.
Claims (7)
1. the vehicle bend overspeed warning device tested the speed based on ultrasound wave, it is characterized in that: it comprises the first main control chip (1) and the second main control chip (2), the input port of the first main control chip (1) is connected with distance measuring sensor (3), Temperature Humidity Sensor (4) respectively, and the delivery outlet of the first main control chip (1) is connected with the first display module (5), first communication module (6), early warning signal generation module (7) respectively;
The input port of the second main control chip (2) is connected with second communication module (8), delivery outlet is connected with the second display module (9);
Second main control chip (2) is connected with host computer (10);
First communication module (6) is connected with second communication module (8).
2. a kind of vehicle bend overspeed warning device tested the speed based on ultrasound wave according to claim 1, it is characterized in that: described first main control chip (1) and the second main control chip (2) for model be the singlechip chip of ATMEGA16, the model of Temperature Humidity Sensor (4) is SHT10, first display module (5) comprises LCD display, and the input port of the first main control chip (1) is connected with Temperature Humidity Sensor respectively with delivery outlet, LCD display connects;
Described distance measuring sensor (3) comprises STC11 chip (301), and STC11 chip (301) is connected with level transferring chip (302) and signal amplifier (303) respectively;
Described first communication module (6) and second communication module (8) comprise radio transmitting and receiving chip (11).
3. a kind of vehicle bend overspeed warning device tested the speed based on ultrasound wave according to claim 2, it is characterized in that: described signal amplifier (303) comprises TL074 chip, level transferring chip (302) is MAX232 chip, and radio transmitting and receiving chip (11) is Nrf24L01 chip.
4. a kind of vehicle bend overspeed warning device tested the speed based on ultrasound wave according to claim 2, is characterized in that: described second display module (9) is LED or LCD display.
5. a kind of vehicle bend overspeed warning device tested the speed based on ultrasound wave according to claim 1, is characterized in that: described host computer (10) is computer.
6. a kind of vehicle bend overspeed warning device tested the speed based on ultrasound wave according to claim 1, is characterized in that: described distance measuring sensor (3) is ultrasonic distance-measuring sensor.
7. a kind of vehicle bend overspeed warning device tested the speed based on ultrasound wave according to claim 3, it is characterized in that: described level transferring chip (302) is connected with the first loudspeaker (12), signal amplifier (303) is connected with the second loudspeaker (13).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520104950.9U CN204375168U (en) | 2015-02-13 | 2015-02-13 | A kind of vehicle bend overspeed warning device tested the speed based on ultrasound wave |
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| CN201520104950.9U CN204375168U (en) | 2015-02-13 | 2015-02-13 | A kind of vehicle bend overspeed warning device tested the speed based on ultrasound wave |
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| CN204375168U true CN204375168U (en) | 2015-06-03 |
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| CN201520104950.9U Expired - Fee Related CN204375168U (en) | 2015-02-13 | 2015-02-13 | A kind of vehicle bend overspeed warning device tested the speed based on ultrasound wave |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105139690A (en) * | 2015-09-17 | 2015-12-09 | 宋泽恩 | Bend blind zone vehicle prompting system |
| CN108777065A (en) * | 2018-06-01 | 2018-11-09 | 西京学院 | A kind of vehicle bend meeting detection prior-warning device and its method |
-
2015
- 2015-02-13 CN CN201520104950.9U patent/CN204375168U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105139690A (en) * | 2015-09-17 | 2015-12-09 | 宋泽恩 | Bend blind zone vehicle prompting system |
| CN105139690B (en) * | 2015-09-17 | 2017-09-26 | 宋泽恩 | A kind of bend blind area vehicle system for prompting |
| CN108777065A (en) * | 2018-06-01 | 2018-11-09 | 西京学院 | A kind of vehicle bend meeting detection prior-warning device and its method |
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| 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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150603 Termination date: 20160213 |