CN203069783U - Motor-assisted bicycle track-change crashproof alarm device - Google Patents
Motor-assisted bicycle track-change crashproof alarm device Download PDFInfo
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- CN203069783U CN203069783U CN 201220725328 CN201220725328U CN203069783U CN 203069783 U CN203069783 U CN 203069783U CN 201220725328 CN201220725328 CN 201220725328 CN 201220725328 U CN201220725328 U CN 201220725328U CN 203069783 U CN203069783 U CN 203069783U
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- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Abstract
The utility model discloses a motor-assisted bicycle track-change crashproof alarm device, which comprises a single-chip microcomputer. The alarm device further comprises an ultrasonic emission circuit, an ultrasonic receiving circuit, a temperature sensor, a crashproof signal circuit and a power supply. One interface of the single-chip microcomputer is serially connected with the ultrasonic emission circuit and the ultrasonic receiving circuit. The single-chip microcomputer is further respectively connected with the temperature sensor, the crashproof signal circuit and the power supply. In reality, the alarm device is not highly required in terms of range finding (generally required to reach the centimeter level). Meanwhile, the technical index and the using cost of a motor-assisted bicycle are taken into consideration. When the distance between the motor-assisted bicycle and a rear vehicle on a target track is smaller than a safe distance, the alarm device then automatically emits alarm signals to remind the driver to be cautious and take timely measures to guarantee safety. The motor-assisted bicycle track-change crashproof alarm device has a simple structure and is practical and economic.
Description
Technical field
The utility model relates to the electric bicycle security fields, relates in particular to a kind of electric bicycle and changes proximity-warning device.
Background technology
In recent years, electric bicycle because cheap, pollute advantages such as light, easy-to-use, be subjected to consumers in general's favor deeply.But along with the universal use of electric bicycle, relevant traffic hazard happens occasionally; Wherein the collision accident that takes place in the process of changing of electric bicycle is occupied certain proportion, has brought the certain economic loss for bicyclist and family thereof, even causes life to threaten.
Summary of the invention
The purpose of this utility model is to utilize ultrasonic measuring distance technology, reduces and avoids electric bicycle to change in the process generation of collision traffic hazard, and the utility model is based on ultrasonic measuring distance technology, proposes and has designed electric bicycle and changed proximity-warning device.
In order to realize above-mentioned technical assignment, the utility model adopts following technical scheme to be achieved:
A kind of electric bicycle changes proximity-warning device, comprise single-chip microcomputer, comprise that also ultrasonic transmit circuit, ultrasound wave accept circuit, temperature sensor, crashproof signal circuit and power supply, wherein single-chip microcomputer port is accepted circuit with ultrasonic transmit circuit, ultrasound wave and is connected, also the linking to each other respectively at temperature sensor, crashproof signal circuit and power supply of single-chip microcomputer.
The utility model also comprises following other technologies characteristics:
Described single-chip microcomputer is the 89C51 single-chip microcomputer.
Described ultrasound wave receiving circuit adopts integrated circuit CX20106A.
Described temperature sensor is the SMT160-30 model.
Because actual requirement to range finding of the present utility model is not very high (generally only requires and reach centimetre-sized), consider technical indicator and the use cost of electric bicycle simultaneously, in the time that the distance between the car is less than safe distance behind electric bicycle and the target track, system will send warning automatically, remind the bicyclist to arouse attention, in time take measures, to ensure safety.The electric bicycle that the utility model proposes changes proximity-warning device practicality, economy, simple in structure.
Description of drawings
Fig. 1 is principle schematic of the present utility model.
Fig. 2 is hardware configuration of the present utility model.
Fig. 3 is ultrasonic transmit circuit of the present utility model.
Fig. 4 is ultrasound wave receiving circuit of the present utility model.
Fig. 5 is program flow diagram of the present utility model.
Below in conjunction with the drawings and specific embodiments particular content of the present utility model is described in further detail.
Embodiment
1 the utility model principle of work is as follows:
Principle of work of the present utility model is as follows: the P1.0 mouth output frequency of 51 single-chip microcomputers is the 40kHz square-wave signal, through power amplification rear drive ultrasonic transmitter, makes it to send the ultrasonic signal of same frequency, and meanwhile timer picks up counting.Ultrasonic signal is met barrier and is reflexed to ultrasonic receiver, after amplifying processing and shaping pulse, obtain effective waveform, form look-at-me, send into the INT0 mouth of single-chip microcomputer, make the INT0 of single-chip microcomputer produce interruption, timer stops timing, so just can obtain ultrasound wave from being transmitted into the time interval △ t of reception.Known by the ultrasonic ranging principle, behind electric bicycle and the target track between the car apart from d be:
d=V*△t/2 （1）
And hyperacoustic velocity of propagation V is relevant with environment temperature T, and the pass between them is:
V=331.45+0.61*T （2）
For calculate more exactly behind electric bicycle and the target track between the car apart from d, in the utility model, settle temperature sensor, environment temperature is measured in real time.When the numerical value of d surpasses the safe distance size of the utility model regulation, start the buzzing warning function, remind the bicyclist to note, so that it is in time handled it.
2 hardware design of the present utility model
Hardware configuration of the present utility model as shown in Figure 2.
Hardware of the present utility model mainly is made up of six parts such as 89C51 single-chip microcomputer, ultrasonic transmit circuit, ultrasound wave receiving circuit, temperature sensor, collision-proof alarm signal circuit and on-off circuits.The each several part function is as follows:
1) the 89C51 single-chip microcomputer is as kernal hardware of the present utility model, play a part crucial, mainly comprise utilize mode that timer overflows interruption the P1.0 mouth produce the reception of 40kHz square-wave signal, temperature signal and ultrasonic propagation velocity correction, utilize interrupt mode to carry out between ultrasound wave propagation timing, electric bicycle and the barrier apart from the calculating of d and the triggering of crashproof signal alarm circuit etc.
2) the main effect of ultrasonic transmit circuit is emission 40kHz square-wave signal (ultrasound wave), and its concrete structure as shown in Figure 3.This circuit receives the 40kHz square-wave signal from 89C51 single-chip microcomputer P1.0 mouth, and launches the ultrasound wave of same frequency by ultrasonic transmit circuit shown in Figure 3.
3) the ultrasound wave receiving circuit adopts integrated circuit CX20106A, and this is the special chip that a infrared ray detection receives, and is usually used in the televisor infrared remote control receiver.Consider that infrared remote control carrier frequency 38KHz commonly used is comparatively approaching with range finding ultrasonic frequency 40KHz, can utilize it as the ultrasound examination circuit.Experimental results show that it has very high sensitivity and stronger antijamming capability.The size of appropriate change C4 can change sensitivity and the antijamming capability of accepting circuit.Through after a series of activities of internal circuit, CX20106A chip output look-at-me is given the INT0 mouth of 89C51 single-chip microcomputer, illustrates to have detected the ultrasound wave that is reflected by barrier.The specific implementation of ultrasound wave receiving circuit as shown in Figure 4.
4) temperature sensor SMT160-30 of the present utility model be Dutch Smartec company at the product that late nineteen nineties has just developed, be the exclusive temperature sensors of all previous U.S.s new cup Chinese college students internet innovation foundation contest.Through the market test of decades, this sensor occupies a tiny space in market all the time with its distinctive characteristic.SMT160-30 adopts single bus interface, and (see figure 2) links to each other with the P1.3 mouth of 89C51 single-chip microcomputer.The main effect of temperature sensor is exactly to measure real-time environment temperature, in order to can calculate hyperacoustic actual propagation speed exactly, thereby improves distance measuring precision.
5) with the audio-signal-driven loudspeaker of P1.4 output 1KHz and 500Hz, make alerting signal, require the 1KHz signal to ring 100ms, the 500Hz signal rings 200ms, hockets, and the P1.7 mouth connects a switch and controls, when the switch alerting signal of closing is sent sound, stop when switch disconnects alarm signal, coding is to realize changing the function of reporting to the police.This switch will replace with the key switch of electric bicycle, and this cover system can operate as normal in motion to guarantee electric bicycle.1) the P1.4 port in " Single Chip Microcomputer (SCM) system " zone is wired on the SPKIN port in " audio frequency amplification module " zone; 2) the SPK OUT port in " audio frequency amplification module " zone connects the loudspeaker in 8 Europe.
3 workflows of the present utility model
Software design of the present utility model mainly comprises following two aspects: the realization of the generation of 40kHz square-wave signal and collision-proof alarm function.According to practical solution, produce the program of 40kHz square-wave signal as subroutine of the present utility model, and the realization program of collision-proof alarm function is as master routine of the present utility model.The process flow diagram of its program respectively as shown in Figure 5.
Claims (4)
1. an electric bicycle changes proximity-warning device, comprise single-chip microcomputer, it is characterized in that: comprise that also ultrasonic transmit circuit, ultrasound wave accept circuit, temperature sensor, crashproof signal circuit and power supply, wherein single-chip microcomputer port is accepted circuit with ultrasonic transmit circuit, ultrasound wave and is connected, also the linking to each other respectively at temperature sensor, crashproof signal circuit and power supply of single-chip microcomputer.
2. electric bicycle as claimed in claim 1 changes proximity-warning device, it is characterized in that: described single-chip microcomputer is the 89C51 single-chip microcomputer.
3. electric bicycle as claimed in claim 1 changes proximity-warning device, it is characterized in that: described ultrasound wave receiving circuit adopts integrated circuit CX20106A.
4. electric bicycle as claimed in claim 1 changes proximity-warning device, it is characterized in that: described temperature sensor is the SMT160-30 model.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220725328 CN203069783U (en) | 2012-12-25 | 2012-12-25 | Motor-assisted bicycle track-change crashproof alarm device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220725328 CN203069783U (en) | 2012-12-25 | 2012-12-25 | Motor-assisted bicycle track-change crashproof alarm device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203069783U true CN203069783U (en) | 2013-07-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220725328 Expired - Fee Related CN203069783U (en) | 2012-12-25 | 2012-12-25 | Motor-assisted bicycle track-change crashproof alarm device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203069783U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108363064A (en) * | 2018-02-26 | 2018-08-03 | 桂林电子科技大学 | A kind of combination alarm set for preventing electric bicycle and entering car lane traveling |
-
2012
- 2012-12-25 CN CN 201220725328 patent/CN203069783U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108363064A (en) * | 2018-02-26 | 2018-08-03 | 桂林电子科技大学 | A kind of combination alarm set for preventing electric bicycle and entering car lane traveling |
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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: 20130717 Termination date: 20151225 |
|
| EXPY | Termination of patent right or utility model |