CN202923490U - Automobile back up anti-collision warning device based on ultrasonic waves - Google Patents
Automobile back up anti-collision warning device based on ultrasonic waves Download PDFInfo
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- CN202923490U CN202923490U CN 201220517947 CN201220517947U CN202923490U CN 202923490 U CN202923490 U CN 202923490U CN 201220517947 CN201220517947 CN 201220517947 CN 201220517947 U CN201220517947 U CN 201220517947U CN 202923490 U CN202923490 U CN 202923490U
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Abstract
The utility model discloses an automobile back up anti-collision warning device based on ultrasonic waves. The automobile back up anti-collision warning device based on the ultrasonic waves comprises a single chip microcomputer, an ultrasonic wave emitting sensor, an ultrasonic wave receiving sensor, a display and a warning device. The ultrasonic wave emitting sensor is connected with a port of the single chip microcomputer through an ultrasonic wave emitting module. The ultrasonic wave receiving sensor is connected with the port of the single chip microcomputer through an ultrasonic wave receiving module. The display and the warning device are respectively connected with two ports of the single chip microcomputer. The automobile back up anti-collision warning device is capable of accurately measuring the distance between an automobile and a barrier during a back up process and displaying the distance accurately on the display. When the distance is less than a threshold value, the warning device is started for warning and the threshold value can be set according to the requirements of a driver, and therefore the automobile back up anti-collision warning device is more human-friendly. In addition, safety of automobile driving is improved, and the automobile back up anti-collision warning device has strong practical value and broad popularization and application prospects.
Description
Technical field
The utility model belongs to intelligent transportation field, is specifically related to a kind of based on the hypracoustic bump-proof alarm device for car backing.
Background technology
Along with socioeconomic development, transportation is day by day prosperous, and automobile pollution sharply rises.Congested traffic condition also is on the rise, and the collision event occurs repeatedly, has caused inevitable personal injury and economic loss.For this situation, design a kind of fast response time, reliability is high and comparatively economic automobile anti-collision alarm system is imperative.The ultrasonic ranging method can be applicable to automobile crashproof monitoring in front and back when reversing as a kind of common distance ranging method, before dangerous situation occurs, in time sends alarm sound, and reminding driver is noted and take slowing down or brake measure.Ultrasonic ranging method principle is to utilize the hypracoustic reflectance characteristics, when vehicle rollback, the ultrasonic distance sensor utilizes the Obstacle Position of ultrasonic testing rear view of vehicle, and in the mode that shows and report to the police, navigating mate is informed in position between vehicle and obstacle, plays the effect of anticollision.
Summary of the invention
For the deficiency that prior art exists, the purpose of this utility model is, provide a kind of can improve drive safety based on the hypracoustic bump-proof alarm device for car backing.
In order to realize above-mentioned task, the utility model adopts following technical scheme to be achieved:
A kind of based on the hypracoustic bump-proof alarm device for car backing, comprise micro controller system, super sonic emission sensor, super sonic receiving sensor, telltale and annunciator, the super sonic emission sensor is connected with the port of micro controller system by the super sonic transmitter module, the super sonic receiving sensor is connected with the port of micro controller system by the super sonic receiver module, and telltale is connected with two ports of micro controller system respectively with annunciator.
Described micro controller system adopts the AT89C51 micro controller system.
Described super sonic emission sensor adopts the UCM40 piezoceramic transducer.
Described super sonic receiving sensor adopts the UCM40R piezoceramic transducer.
Described telltale adopts light-emitting diode display.
The utility model can carry out Measurement accuracy to the distance between vehicle and obstacle in reversing process, and accurately be presented on read-out, start alarm equipment alarm during less than threshold values when distance, described threshold values can be according to the requirements set of navigating mate, hommization more.Improved the safety of vehicle drive, it has very strong practical value, and wide popularizing application prospect.
Description of drawings
Fig. 1 is annexation schematic diagram of the present utility model.
Fig. 2 is super sonic transmitter module circuit diagram of the present utility model.
Fig. 3 is super sonic receiver module circuit diagram of the present utility model.
Fig. 4 is display module circuit diagram of the present utility model.
Fig. 5 is alarm module circuit diagram of the present utility model.
Below in conjunction with drawings and Examples, particular content of the present utility model is described in more detail.
The specific embodiment
Below provide specific embodiment of the utility model, need to prove that the utility model is not limited to following specific embodiment, all equivalents of doing on present techniques scheme basis all fall into protection domain of the present utility model.
The super sonic emission sensor that is connected with the super sonic transmitter module adopts the UCM40 piezoceramic transducer, its operating voltage is the impulse singla of 40kHz, this impulse singla is sent by the I/O mouth by micro controller system, amplify through aerotron T, thereby make T40-16 excitation transducer launch the pulse ultrasonic wave of 40kHz, and continue emission 200 μ s.The super sonic transmitter module comprises that terminal voltage is power supply, resistance, aerotron and the excitation transducer of 9V, and super sonic transmitter module circuit diagram as shown in Figure 2.
The super sonic receiving sensor that is connected with the super sonic receiver module adopts the UCM40R sensor with the pairing of super sonic emission sensor, the super sonic receiver module receives the super sonic receiving sensor to such an extent that pulse ultrasonic wave becomes the alternating voltage signal, and the alternating voltage signal adds to IC2 after the op amp two-stage is amplified.IC2 is the audio coding integrated package LM567 with locking ring, the central frequency f0=1/1.1R8C3 of inner voltage controlled oscillator (VCO), and capacitor C 4 determines its locking bandwidth.When conciliation R8 was on the carrier frequency of emission, audio coding integrated package LM567 incoming signal was greater than 25mV, and mouth 8 pin are low level by high level transition, as break request signal, delivered to micro controller system and processed.
Micro controller system adopts the AT89C51 micro controller system, and micro controller system starts inner timer T0 simultaneously when starting transmitter module, utilizes the tally function of timer to record the time of super sonic emission and the time that super sonic receives.When receiving super sonic, the receiver module mouth produces a negative saltus step,
Or
End produces a break request signal, and micro controller system response external interrupt request is carried out the external interrupt service subprogram, reads the time difference, calculates the distance between automobile and obstacle, and super sonic receiver module circuit diagram as shown in Figure 3.
The distance range that the display module demonstration is set is 4 meters, therefore select 3 LED charactrons to show, bump-proof alarm device for car backing selects 8155 chips as the I/O mouth of single-chip microcomputer extension.The PA mouth of 8155 chips for improving display brightness, adopts 8 road rp-drive 74LS244 to drive as the font delivery port of LED; The PC mouth adopts the light-emitting diode display of the common anode utmost point as the position selected control donsole of LED, due to 8 sections complete when bright the drive current of position control line larger, adopt 6 road rp-drive 74LS06 to improve power-handling capability, the display module circuit diagram as shown in Figure 4.
Annunciator comprises loudspeaker and a light-emitting diode, and alarm module comprises an operational amplification circuit, for the secondary operation amplifier, all adopts the F007 chip.When single chip computer AT 89C51 passes through the P1.0I/O mouth, launch the hypracoustic signal, namely export a high level to the I/O mouth, the voltage of about 5V, monolithic counter T0 begins timing simultaneously, signal amplifies through aerotron T1, makes electric current reach the working current of T40-16, thereby launches super sonic.The super sonic of launching as super sonic emission sensor T40-16 can be reflected back when running into obstacle, at this moment super sonic receiving sensor R40-16 just can receive the super sonic that reflects, and convert electric signal to, amplify at the two poles of the earth through op amp, signal is given the input end of LM567, during greater than 25mA, its No. 8 output pins can produce a signal, make single chip computer AT 89C51 produce an interruption when the input end electric current of LM567.Like this, counting machine just stops counting.Micro controller system count time difference carry out computing, thereby calculate the distance of automobile and obstacle, and operation result is delivered to seven sections LED display circuits in the da mode goes demonstration.If distance less than 0.5m, just single chip computer AT 89C51 gives signal of P1.5 mouth, makes warning circuit work, realize reporting to the police.The alarm module circuit diagram as shown in Figure 5.
during the utility model work, at first open whole device, threshold values of artificial setting, the device initialization is complete, at first bump-proof alarm device for car backing launches super sonic by the super sonic transmitter module to a direction, this moment, the clocking capability of micro controller system was opened, after receiving when the super sonic receiver module super sonic that is reflected by obstacle, the micro controller system timing stops, the Time Calculation of micro controller system propagation speed aerial according to super sonic and record goes out the distance of automobile launch point and obstacle, show at display module, when the distance of calculating during less than the threshold values that sets in advance, alarm module is started working, reminding driver is braked or is slowed down.
Claims (5)
1. one kind based on the hypracoustic bump-proof alarm device for car backing, comprise micro controller system, super sonic emission sensor, super sonic receiving sensor, telltale and annunciator, it is characterized in that, the super sonic emission sensor is connected with the port of micro controller system by the super sonic transmitter module, the super sonic receiving sensor is connected with the port of micro controller system by the super sonic receiver module, and telltale is connected with two ports of micro controller system respectively with annunciator.
2. according to claim 1ly it is characterized in that based on the hypracoustic bump-proof alarm device for car backing, described micro controller system adopts the AT89C51 micro controller system.
3. according to claim 1ly it is characterized in that based on the hypracoustic bump-proof alarm device for car backing, described super sonic emission sensor adopts the UCM40 piezoceramic transducer.
4. according to claim 1ly it is characterized in that based on the hypracoustic bump-proof alarm device for car backing, described super sonic receiving sensor adopts the UCM40R piezoceramic transducer.
5. according to claim 1ly it is characterized in that based on the hypracoustic bump-proof alarm device for car backing, described telltale adopts light-emitting diode display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220517947 CN202923490U (en) | 2012-10-10 | 2012-10-10 | Automobile back up anti-collision warning device based on ultrasonic waves |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220517947 CN202923490U (en) | 2012-10-10 | 2012-10-10 | Automobile back up anti-collision warning device based on ultrasonic waves |
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| Publication Number | Publication Date |
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| CN202923490U true CN202923490U (en) | 2013-05-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220517947 Expired - Fee Related CN202923490U (en) | 2012-10-10 | 2012-10-10 | Automobile back up anti-collision warning device based on ultrasonic waves |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103552504A (en) * | 2013-11-06 | 2014-02-05 | 张力永 | Back-up safety system of loading machine |
-
2012
- 2012-10-10 CN CN 201220517947 patent/CN202923490U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103552504A (en) * | 2013-11-06 | 2014-02-05 | 张力永 | Back-up safety system of loading machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130508 Termination date: 20131010 |