CN2177617Y

CN2177617Y - Pressure monitor for vehicle tyres

Info

Publication number: CN2177617Y
Application number: CN 93247052
Authority: CN
Inventors: 王俊峰
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-12-07
Filing date: 1993-12-07
Publication date: 1994-09-21
Anticipated expiration: 2003-12-07

Abstract

The utility model relates to a pressure monitor for vehicle tires, which mainly comprises an air-pressure central monitoring device and a pressure-measuring oscillation device for the tires, wherein, the air-pressure central monitoring device is composed of an inquiry circuit and a pressure-measuring display circuit; the pressure-measuring oscillation device for the tires is composed of an amplifying-shaping circuit, an and gate amplifying circuit, a pressure sensor and a pressure control oscillation circuit. The utility model can rapidly and accurately measure the air pressure of each tyre of the vehicle in time, and has the advantages of simple structure, convenient operation and reliable performance. The utility model can effectively prevent vehicle traffic accidents caused by abnormal tyre pressure.

Description

Pressure monitor for vehicle tyres

The utility model relates to the tire air pressure monitoring device of vehicle.

At present, various vehicles are not monitored the device of tire pressure, its air pressure size can not accurately be measured, only when the very little tire of air pressure is sunken, can after detecting, range estimation inflate, though excessive as tire pressure deficiency or tire pressure, but can not estimate, can only judge by rule of thumb by chaufeur, both inaccurate, be difficult for advance preventing again, wait to find often late, the too small or tyre blow-out repairing of on the way stopping as air pressure, just easy choke the road, influence traffic, when serious traffic accident takes place then, cause damage.

The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art part, designs a kind of vehicle tyre air pressure monitoring device that can in time find and accurately monitor out the air pressure size of each tire of vehicle.

The purpose of this utility model realizes by following art technical scheme: it comprises the air pressure central monitoring device is made up of enquiry circuit I, pressure measurement display circuit II and the tire pressure measurement oscillation device of forming by the amplification and rectification circuit III, with an amplifying circuit IV, pressure sensor V and Voltage-Controlled oscillation circuit VI, wherein:

The pressure sensor V comprises air pressure sebific duct 1, pressure contact 2, spring 3, connecting rod 4, dividing plate 5, electric conductor 6, insulator 7, slider 8, source switch lead-in wire 9, potential device lead-in wire 10, resistance winding 11 and housing 12, the air pressure sebific duct 1 that is fixed in the housing 12 is communicated with inner tube, connecting rod 4 is fixed in the housing 12, the left end of connecting rod 4 is fixed with pressure contact 2, be set with spring 3 on the connecting rod 4 left side bodies of rod, the medial surface of the left end roof pressure power contact 2 of spring 3 is close on the outer wall of air pressure sebific duct 1, the right end base of spring 3 is against on the dividing plate 5 of housing 12 internal fixation, be respectively arranged with electric conductor 6 in the housing 12, insulator 7 and resistance winding 11, two contacts that are fixed on the slider 8 of connecting rod 4 right-hand members can touch resistance winding 11 and electric conductor 6 or insulator 7 respectively, and are fixedly connected with source switch lead-in wire 9 and potential device lead-in wire 10 on two contact respectively;

The enquiry circuit I comprises by IC1:A, IC1:B, the oscillation circuit that resistance R 1 and capacitor C 1 are formed, its mouth 4 pin, be coupled to input end 2 pin of amplification and rectification circuit III ic chip 2 through capacitor C 2, the oscillation wave of enquiry circuit I output links to each other from input end 1 pin of mouth 1 pin output with AND circuit IV ic chip 3 after it amplifies shaping, another input end 2 pin of AND circuit IV ic chip 3 link to each other with the source switch K of pressure sensor V, mouth 3 pin of AND circuit IV ic chip 3 link to each other with input end 2 pin of the oscillator IC4 of Voltage-Controlled oscillation circuit VI by adjustable resistance R3, produce the vibration harmonic wave is coupled to the ic chip 5 in the pressure measurement display circuit II by its mouth 9 foot meridian capacitor C4 input end 5 pin, filtering is after its mouth 7 pin input central processor CPU, two mouths of CPU are connected audible indicators W and active display D respectively, two input/output interfaces of central processor CPU are connected memory under program ic chip 6 and latch driver ic chip 7 respectively, and the mouth of latch driver IC7 is connected nixie display B.

It is indoor that air pressure central monitoring device is arranged on vehicular drive, each car is provided with one, the tire pressure measurement oscillation device all respectively is provided with one on each tire of vehicle, each several part is established independent current source, signal partly conducts by this car metal, corresponding mass is set so that wheel balance on the wheel hub of relative 180 ° of positions with it.

The utility model has been compared following advantage with above-mentioned prior art:

1, this device has overcome the various disadvantages of range estimation tire pressure, can measure the air pressure size of each tire of vehicle rapidly, in time, exactly;

2, simple in structure, make easily, cost is low, easy and simple to handle;

3, this device performance is reliable, can prevent from effectively the vehicle traffic accident that takes place because of the tire pressure mal to have strengthened the traffic safety guarantee.

Following comparative examples further specifies this vehicle tyre air pressure monitoring device.

Fig. 1 is the block diagram of vehicle tyre air pressure monitoring device;

Fig. 2 is the structural representation of the pressure sensor of vehicle tyre air pressure monitoring device;

Fig. 3 is the schematic circuit diagram of vehicle tyre air pressure monitoring device.

Among the figure: 1-air pressure sebific duct 2-pressure contact 3-spring

4-connecting rod 5-dividing plate 6-electric conductor

7-insulator 8-slider 9-source switch lead-in wire

10-potential device lead-in wire 11-resistance winding 12-housing

B-nixie display W-audible indicators D-active display

With reference to Fig. 1, Fig. 2 and Fig. 3, the structure of pressure sensor V is in above narration, when the pressure of tire during less than normal rating air pressure, the spring force of spring 3 is greater than the atmospheric pressure of (being in the tire) in the air pressure sebific duct 1, spring 3 by pressure contact 2 top air pressure sebific ducts 1 left, drivening rod 4 and the slider 8 that is fixed in the one end are moved to the left simultaneously, a contact of slider 8 is shifted to the small resistor position, another contact moves to left and breaks away from insulator 7, and contacts and turning circuit with electric conductor 6; When the pressure of tire during greater than normal rating air pressure, atmospheric pressure is greater than spring force, air pressure sebific duct 1 moves right by pressure contact 2 compression springs 3 and drivening rod 4 and the slider 8 fixed on it, a contact of slider 8 is shifted to big resistance position, another contact moves to right disengaging insulator 7 and contacts and turning circuit with electric conductor 6, above-mentioned two kinds of situations are all connected the amplification and rectification circuit III in the tire pressure measurement oscillation device, with door amplifying circuit IV, the pressure sensor V, each power supply of Voltage-Controlled oscillation circuit VI, only keep Weak current for saving electric energy, be in and treat mode of operation, connect the power supply of enquiry circuit I when chaufeur, make the amplification and rectification circuit III, with door amplifying circuit IV, the pressure sensor V, the Voltage-Controlled oscillation circuit VI is started working, and receive and show, thereby learn the air pressure size of each tire of vehicle by the monitoring display circuit II of air pressure central monitoring device.Its working process is: opening power, the ic circuit IC14069 output signal of enquiry circuit I becomes a vdc and is input to and 1 pin of ic circuit IC34011 after the ic chip 2358 of shaping amplification circuit III amplifies shaping, its another input end 2 pin have been added with voltage, IC3 works and will export the adjustable potentiometer R3 upper end that high potential is added on the pressure sensor V through its 3 pin, the size of R3 is with the tire pressure size variation of pressure sensor V sampling, making voltage on oscillator input end 2 pin that are added in the Voltage-Controlled oscillation circuit VI is voltage with the tire pressure respective change, oscillator adopts ic circuit IC4CD4060, go out the oscillation frequency signal of respective change by its mouth 9 human hair combing wastes, behind ic chip 5358 filter shapes, import central processor CPU, CPU adopts micro controller system 8031, two mouths of CPU are connected audible indicators W and active display D respectively, two input/output interfaces are connected memory under program and latch driver respectively, memory under program adopts ic chip 62764, latch driver adopts IC774LS373, is demonstrated the corresponding tire and the air pressure numerical value thereof of required mensuration by IC7 input nixie display B.

Measure the air pressure of vehicle tyre when opening power, as tire pressure in regime values, the enquiry circuit I is sent request signal, and because of tire pressure is normal, the contact of the slider 8 of pressure sensor V rests on insulator 7 positions, power supply is obstructed, the output of oscillator IC3 no signal, the input of central processor CPU no signal, audible indicators W is sounding not, active display D display lamp optical signal, nixie display B show that the air pressure of measuring corresponding tire is 00.

Claims

1, a kind of vehicle tyre air pressure monitoring device, it is characterized in that comprising the air pressure central monitoring device formed by enquiry circuit I, pressure measurement display circuit II and the tire pressure measurement oscillation device of forming by the amplification and rectification circuit III, with a door amplifying circuit IV, pressure sensor V, Voltage-Controlled oscillation circuit VI, wherein:

The pressure sensor V comprises air pressure sebific duct (1), pressure contact (2), spring (3), connecting rod (4), dividing plate (5), electric conductor (6), insulator (7), slider (8), source switch lead-in wire (9), potential device lead-in wire (10), resistance winding (11) and housing (12), the air pressure sebific duct (1) that is fixed in the housing (12) is communicated with inner tube, connecting rod (4) is fixed in the housing (12), the left end of connecting rod (4) is fixed with pressure contact (2), be set with spring (3) on the body of rod of connecting rod (4) left side, the medial surface of the left end roof pressure power contact (2) of spring (3) is close on the outer wall of air pressure sebific duct (1), the right end base of spring (3) is against on the dividing plate (5) of housing (12) internal fixation, be respectively arranged with electric conductor (6) in the housing (12), insulator (7) and resistance winding (11), two contacts that are fixed on the slider (8) of connecting rod (4) right-hand member can touch resistance winding (11) and electric conductor (6) or insulator (7) respectively, and are fixedly connected with source switch lead-in wire (9) and potential device lead-in wire (10) on two contact respectively;

The enquiry circuit I comprises by IC1: A, IC1: B, the oscillation circuit that resistance R 1 and capacitor C 1 are formed, its mouth 4 foot meridian capacitor C2 are coupled to input end 2 pin of amplification and rectification circuit III ic chip 2, mouth 1 pin of IC2 links to each other with input end 1 pin of AND circuit IV ic chip 3, another input end 2 pin of IC3 link to each other with the source switch K of pressure sensor V, mouth 3 pin of IC3 link to each other with input end 2 pin of the oscillator IC4 of Voltage-Controlled oscillation circuit VI by adjustable resistance R3, the mouth 9 foot meridian capacitor C4 of IC4 are coupled to input end 5 pin of the ic chip 5 in the pressure measurement display circuit II, connect central processor CPU by its mouth 7 pin, two mouths of central processor CPU are sending and receiving sound telltale W and active display D respectively, two input/output interfaces of central processor CPU connect memory under program ic chip 6 and latch driver ic chip 7 respectively, the output termination nixie display B of latch driver ic chip 7;

It is indoor that air pressure central monitoring device is arranged on vehicular drive, and each car is provided with one, and the tire pressure measurement oscillation device all respectively is provided with one on the hub of each tire of vehicle, and each several part is established independent current source, and signal partly conducts by the vehicle metal.

2, vehicle tyre air pressure monitoring device according to claim 1, it is characterized in that with the wheel hub that the relative 180 ° of positions of tire pressure measurement oscillation device are set on corresponding mass is set.