CN202911631U - Anti-slip automatic alarm device for automobile in rainy day - Google Patents
Anti-slip automatic alarm device for automobile in rainy day Download PDFInfo
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- CN202911631U CN202911631U CN 201220518943 CN201220518943U CN202911631U CN 202911631 U CN202911631 U CN 202911631U CN 201220518943 CN201220518943 CN 201220518943 CN 201220518943 U CN201220518943 U CN 201220518943U CN 202911631 U CN202911631 U CN 202911631U
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Abstract
The utility model discloses an anti-slip automatic alarm device for an automobile in a rainy day. The anti-slip automatic alarm device comprises a power unit, a sensor unit, a photocoupling unit, an audible and visual alarm unit, a display unit, a speed setting unit and an automatic control unit. The sensor unit is connected with the photocoupling unit, the photocoupling unit is respectively connected with the audible and visual alarm unit and the display unit, the automatic control unit is respectively connected with the photocoupling unit, the audible and visual alarm unit, the speed setting unit and the display unit, and the power unit is respectively connected with the speed setting unit, the automatic control unit, the photocoupling unit, the audible and visual alarm unit and the display unit. The anti-slip automatic alarm device can judge whether the speed of the automobile exceeds the limiting speed of driving in the rainy day or not according to signals collected by the sensor unit, and accordingly achieves an anti-slip automatic alarm function for the automobile in the rainy day. The anti-slip automatic alarm device has the advantages of simple circuit design, rapid response, control accuracy, low cost and the like.
Description
Technical field
The utility model belongs to the automotive safety technical field, relates to a kind of autoalarm, particularly relates to a kind of rainy day vehicle skidproof autoalarm.
Background technology
Being accompanied by the expanding economy vehicle has become the main stream traffic instrument of society, simultaneously under the propelling of scientific and technological fast development, the speed of vehicle constantly improves, in the rainy day, have ponding on the highway, during high vehicle speeds, will produce the dynamic pressure moisture film, make the vehicle get out of hand, cause the generation major traffic accidents.Therefore to the analysis of the formation of dynamic pressure moisture film, determine the terminal speed of rainy day Vehicle Driving Cycle, invent a kind of rainy day vehicle skidproof autoalarm of practicality and demand urgently carrying out.
Summary of the invention
For the deficiency that prior art exists, the purpose of this utility model is, anti-skidding autoalarm of a kind of rainy day is provided, for people's safety provides further guarantee.
In order to realize above-mentioned task, the utility model adopts following technical scheme to be achieved:
A kind of rainy day vehicle skidproof autoalarm, comprise power subsystem unit, sensor unit, photoelectric coupling unit for promoting inhibition, acousto-optic warning unit, display unit, speed of a motor vehicle setup unit and automatic control unit, sensor unit links to each other with photoelectric coupling unit for promoting inhibition, photoelectric coupling unit for promoting inhibition links to each other with display unit with acousto-optic warning unit respectively, automatic control unit respectively with photoelectric coupling unit for promoting inhibition, acousto-optic warning unit, speed of a motor vehicle setup unit links to each other with display unit, power subsystem unit respectively with speed of a motor vehicle setup unit, automatic control unit, photoelectric coupling unit for promoting inhibition, acousto-optic warning unit links to each other with display unit.
The utility model also has following other technologies characteristics:
Described power subsystem unit is three terminal integrated voltage stabilizer W7805.
Described sensor is the magneto-electric coil pickup.
Described photoelectric coupling unit for promoting inhibition is photoelectrical coupler PC817.
Described display unit is the MAX7219 chip.
The electric circuit constitute that described speed of a motor vehicle setup unit is made of 4 buttons and resistance.
Described automatic control unit adopts single chip computer AT 89C51.
Described acousto-optic warning unit is made of 7406, one red LED lamps of the integrated circuit that contains piezo buzzer and a green LED lamp.
The utility model can judge whether the speed of a motor vehicle has surpassed the terminal speed of rainy day driving according to the signal that sensor unit is collected, thereby realizes the vehicle skidproof auto-alarm function under the rainy day condition.This control setup has that circuit layout is simple, response fast, the characteristics such as precise control and cost be low.
Two brushes of sensor, with the frequency that wheel turns over, namely square-wave signal sends photoelectrical coupler to, realizes noncontact measurement, transfers signals to micro controller system again, and micro controller system connects driving voltage.The realization micro controller system is connected with tachogenerator.Its principal feature is that the speed of test can be sent to micro controller system inside with non-contacting mode.
Photoelectric coupler isolation contacting directly of car speed sensor and micro controller system, eliminate sensor signal to the adverse effect of micro controller system (what sensor produced is constant current low resistance signal, and voltage is subjected to the impact of external loading large).
Description of drawings
Fig. 1 is the annexation schematic diagram of rainy day vehicle skidproof autoalarm various piece.
Fig. 2 is three terminal regulator W7805 circuit diagram in the power subsystem unit.
Fig. 3 is the sensor unit structure schematic diagram.
Fig. 4 is the corresponding square-wave signal of automobile driving speed
Fig. 5 is the photoelectric coupling unit for promoting inhibition circuit diagram.
Fig. 6 is speed of a motor vehicle setup unit circuit diagram.
Fig. 7 is the display unit circuit schematic diagram.
Fig. 8 is the acousto-optic warning unit circuit diagram.
Wherein, the implication of each label has: 1-is with the plastic hoop of four pairs of magnetic poles, 2-reed switch pipe, 3-the first terminal, 4-the second terminal, 5-square-wave signal, 6-light emitting source, 7-light-receiving device.
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.
Defer to technique scheme, as shown in Figure 1, the utility model device comprises power subsystem unit, sensor unit, photoelectrical coupler unit, acousto-optic warning unit, display unit, speed of a motor vehicle setup unit and automatic control unit.Automatic control unit links to each other with display unit with sensor unit, acousto-optic warning unit, speed of a motor vehicle setup unit respectively, and power subsystem unit links to each other with sensor unit, automatic control unit, acousto-optic warning unit and display unit respectively.
As shown in Figure 2, power subsystem unit is three terminal regulator W7805, adopts nickel-cadmium chargeable battery (7.2 volts) as the supplying power for input end of three terminal regulator W7805.Three terminal regulator partly is comprised of start-up circuit, reference voltage circuit, sampling comparison amplifying circuit, Circuit tuning and protective circuit etc.As the input end u of circuit during greater than 5V, the 5V voltage of mouth stable output.
As shown in Figure 3, sensor unit is the magneto-electric coil pickup, comprises the plastic hoop 1 with four pairs of magnetic poles, reed switch pipe 2, and the first terminal and the second terminal, wherein, the first terminal 3 connects electronic spedometer, and the second terminal 4 connects battery negative post.Plastic hoop with 4 pairs of magnetic poles is installed on the left output shaft of change-speed box, together rotates the formation rotating field with axle.The reed switch pipe is installed near on the case of transmission of plastic hoop, and it is that the on-off element that 2 elongated contacts consist of is housed in a glass tube, and its contact is made by magnetic material.Have very little gap between reed switch pipe and plastic hoop, closed when the contact is near the plastics utmost point in the reed switch pipe when plastic hoop rotates, disconnect when leaving the plastics utmost point.
As shown in Figure 4, this is the corresponding square-wave signal of automobile driving speed.The rainy day automobile limit speed of a motor vehicle is set up corresponding analysis.According to monobasic Steady Flow Bernou1li equation, dynamic pressure moisture film and equilibrium of pressure relation by the integration variation of pressure curved surface, are ρ=1000kg/m in the density of fetching water
3Condition under, draw following formula after the unified dimension:
v
2＝18950F/（LB）
In the formula: v is the limit speed of a motor vehicle, km/h; F is wheel single-wheel carrying gravity, N; L is tire ground contact length, mm; B is tyre contact width, mm.
F wherein, L, B all can measure, and calculate rainy day driving terminal speed v.According to rainy day driving terminal speed, can calculate the limit number of turns that wheel turns within the unit time: n=v/ π D.Produce limit pulse count f
0=8n.Relatively, if f＞f
0, the pulse count that produces when wherein f is for driving, then vehicle speed alarm sends sound and light alarm.
As shown in Figure 5, photoelectric coupling unit for promoting inhibition is photoelectrical coupler PC817, photoelectrical coupler is as medium take light, a kind of electrical-optical-power conversion device of signal transmission, be comprised of light emitting source 6 and light-receiving device 7, sensor signal is positioned at high level, during square-wave signal 5, light emitting source 6 luminous and control light-receiving device 7 conductings, then light-receiving device 7 mouths produce the voltage signal consistent with the car speed sensor frequency.
As shown in Figure 6, speed of a motor vehicle setup unit is comprised of key circuit, can set up rainy day limit road speed on their own, and we select P2.3, P2.4, P2.5, the P2.6 mouth of micro controller system to link to each other with K0, K1, K2, K3 respectively.When button presses down, produce low level data are sent to micro controller system.
As shown in Figure 7, display circuit is the MAX7219 chip, and MAX7219 is the common cathode LED display driver of a kind of highly integrated serial input/output.Every can drive 8 the 7 sections common cathode charactrons that add arithmetic point.Arrive G for A among SEGA ~ SEGG(figure) be LED seven-segment display section drive end, SEGDP is the arithmetic point drive end; SEGA ~ SEGG, the outgoing current of 7 sections of DP driving displays and arithmetic point is generally about 40mA, but the software adjustment, during closed condition, access GND.DIG7 ~ DIG0:8 bit value drive wire.Carry out bit selects signal, sucks electric current from each LED common cathode, absorbs the position drive wire of telltale common cathode electric current.Its maxim can reach 500mA, during closed condition, and output+VCC.
Counting machine can be added up the number of input pulse, can come the rotation number of turns of accounting automobile wheel in 1s with it, and two decade counters compositions of this circuit employing mould values are 100 counting machine.The effect of latch is with the state latch of counting machine and deliver to decoding monitor, until new signal arrives, with the demonstration data that guarantee that telltale can be stable after the 1s signal ended.
As shown in Figure 8, acousto-optic warning unit is comprised of 7406, one red LED lamp of the integrated circuit that contains piezo buzzer and a green LED lamp.Audible alarm is connected by the micro controller system pin and draws resistance, and transistor and loud speaker consist of, and light warning is made of two light-emitting diodes.When speed did not surpass rainy day driving terminal speed, green light was lighted, and does not report to the police.Micro controller system is just with P2.7 greater than setting speed the time when speed, and the P1.7 mouth is set to high level, and red light is lighted, and green light extinguishes simultaneously.The P2.7 high level is just with transistor emitter conducting, buzzer warning.Thereby realized rainy day vehicle skidproof auto-alarm function.
Claims (8)
1. rainy day vehicle skidproof autoalarm, it is characterized in that, comprise power subsystem unit, sensor unit, photoelectric coupling unit for promoting inhibition, acousto-optic warning unit, display unit, speed of a motor vehicle setup unit and automatic control unit, sensor unit links to each other with the photoelectric coupling unit for promoting inhibition input end, the photoelectric coupling unit for promoting inhibition mouth links to each other with display unit with acousto-optic warning unit respectively, automatic control unit respectively with photoelectric coupling unit for promoting inhibition, acousto-optic warning unit, speed of a motor vehicle setup unit links to each other with display unit, power subsystem unit respectively with speed of a motor vehicle setup unit, automatic control unit, photoelectric coupling unit for promoting inhibition, acousto-optic warning unit links to each other with display unit.
2. rainy day vehicle skidproof autoalarm as claimed in claim 1 is characterized in that, described power subsystem unit is three terminal integrated voltage stabilizer W7805.
3. rainy day vehicle skidproof autoalarm as claimed in claim 1 is characterized in that, described sensor is the magneto-electric coil pickup.
4. rainy day vehicle skidproof autoalarm as claimed in claim 1 is characterized in that, described photoelectric coupling unit for promoting inhibition is photoelectrical coupler PC817.
5. rainy day vehicle skidproof autoalarm as claimed in claim 1 is characterized in that, described display unit is the MAX7219 chip.
6. rainy day vehicle skidproof autoalarm as claimed in claim 1 is characterized in that, the electric circuit constitute that described speed of a motor vehicle setup unit is made of 4 buttons and resistance.
7. rainy day vehicle skidproof autoalarm as claimed in claim 1 is characterized in that, described automatic control unit adopts single chip computer AT 89C51.
8. rainy day vehicle skidproof autoalarm as claimed in claim 1 is characterized in that, described acousto-optic warning unit is made of 7406, one red LED lamp of the integrated circuit that contains piezo buzzer and a green LED lamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220518943 CN202911631U (en) | 2012-10-11 | 2012-10-11 | Anti-slip automatic alarm device for automobile in rainy day |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220518943 CN202911631U (en) | 2012-10-11 | 2012-10-11 | Anti-slip automatic alarm device for automobile in rainy day |
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| Publication Number | Publication Date |
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| CN202911631U true CN202911631U (en) | 2013-05-01 |
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| CN 201220518943 Expired - Fee Related CN202911631U (en) | 2012-10-11 | 2012-10-11 | Anti-slip automatic alarm device for automobile in rainy day |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103625362A (en) * | 2013-11-05 | 2014-03-12 | 奇瑞汽车股份有限公司 | Automobile protection sound prompting system and control method thereof |
-
2012
- 2012-10-11 CN CN 201220518943 patent/CN202911631U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103625362A (en) * | 2013-11-05 | 2014-03-12 | 奇瑞汽车股份有限公司 | Automobile protection sound prompting system and control method thereof |
| CN103625362B (en) * | 2013-11-05 | 2016-06-01 | 奇瑞汽车股份有限公司 | A kind of automobile is set up defences sound prompt system and control method thereof |
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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: 20130501 Termination date: 20131011 |