CN2781479Y - Two-way channel communication compatible circuit in tyre pressure monitoring system - Google Patents
Two-way channel communication compatible circuit in tyre pressure monitoring system Download PDFInfo
- Publication number
- CN2781479Y CN2781479Y CN 200520040478 CN200520040478U CN2781479Y CN 2781479 Y CN2781479 Y CN 2781479Y CN 200520040478 CN200520040478 CN 200520040478 CN 200520040478 U CN200520040478 U CN 200520040478U CN 2781479 Y CN2781479 Y CN 2781479Y
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- low frequency
- circuit
- high frequency
- monitoring system
- pressure monitoring
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- Measuring Fluid Pressure (AREA)
Abstract
The utility model provides a two-way channel communication compatible circuit in tire pressure monitoring system, which comprises a low frequency drive circuit, a signal line, and a low frequency transmitting circuit connected by lines in sequence, wherein the low frequency drive circuit receives low frequency control signals. The utility model is characterized in that the signal line is connected with one end of the low frequency transmitting circuit and is connected with a high frequency receiving antenna. The signal line is connected with one end of the low frequency drive circuit and is connected with the high frequency receiving circuit through a capacitance. After low frequency signals of 125KHz in a receiver pass through a low frequency driving pipe, the low frequency signals send out control commands to a low frequency transmitter coil of 125KHz. on the same signal line, the high frequency receiving antenna simultaneously sends out high frequency signals to the receiver after the high frequency receiving antenna receives high frequency signals. A set of signal lines and insertion pieces can be saved to effectively reduce the product cost and to simplify the product structure.
Description
Technical field
The utility model relates to two-way communication compatible circuit in the tire pressure monitoring system, specifically, relates to the circuit of tire pressure monitoring system medium-high frequency and the shared signal wire of low frequency two-way communication.
Background technology
Consult Fig. 1, the existing tire pressure monitoring system that adopts the two-way communication mode comprises sensor and receiver, is separately installed with a sensor on four wheels of car.Receiver comprises microprocessor MCU1, microprocessor MCU2, high frequency receiving element 3 and the low frequencies unit that is made of low frequency driving circuit 41 and low frequencies circuit 42.
High frequency receiving element 3 comprises high-frequency data receiving end 303 and high-frequency signal demodulation module 31.High-frequency data receiving end 303 connects antenna 32, to receive the tire parameter from sensor.The high-frequency data that high-frequency signal demodulation module 31 is used for receiving converts data-signal to and sends.Microprocessor MCU1 comprises data-signal input end 110, low frequency signal output terminal 11 and output module 12.Data-signal input end 110 receives the data-signal that high-frequency signal demodulation module 31 sends.Microprocessor MCU2 comprises control signal output ends 21 and load module 22, and load module 22 links to each other with output module 12.Low frequency driving circuit 41 links to each other with low frequency signal output terminal 11 with control signal output ends 21.
Above tire pressure monitoring system adopts the both-way communication technology, receiver passes through the 125KHz low frequency signal to tire inner sensor transmitting control commands, after the tire inner sensor is received the receiver order, send various tire coefficients with the high frequency form to receiver according to order, as: pressure, temperature, sensor battery electric weight etc.High frequency transmission line wherein separates with the low-frequency transmission line arranges, and needs two cover transmission line and connectors, has increased cost of products thus.
The utility model content
The purpose of this utility model is, two-way communication compatible circuit in a kind of tire pressure monitoring system is provided, and overcomes present high frequency transmission line and separates with the low-frequency transmission line and arrange, and needs two cover transmission line and connectors, the cost of products technical problems of high.
In order to achieve the above object, the technical solution of the utility model is as follows:
Two-way communication compatible circuit in a kind of tire pressure monitoring system comprises the low frequency driving circuit that connects with circuit successively, signal wire and low frequencies circuit; The low frequency driving circuit receives low-frequency control signal; Be characterized in that described signal wire connects low frequencies circuit one end and connects high frequency receiving antenna, described signal wire connects low frequency driving circuit one end and connects the high frequency receiving element through electric capacity.
Described capacitance size is 100Pf to 500Pf, can reach best anti-interference effect.
Be provided with amplifying circuit in the described high frequency receiving circuit.
Described low frequency driving circuit is made of Sheffer stroke gate and two low frequency driving tubes.
Described signal wire connects low frequency driving circuit one end between two low frequency driving tube lines.
Adopt above-mentioned compatible circuit, the shared signal wire of high-frequency/low-frequency two-way communication, and can not produce the phase mutual interference.125KHz low frequency signal in the receiver is by behind the low frequency driving tube, behind the shared signal wire of high-frequency signal line, to 125KHZ low frequencies coil transmitting control commands.Simultaneously, on same signal wire, after high frequency receiving antenna receives high-frequency signal, send high-frequency signal to receiver, can save a cover signal wire and a connector thus, effectively reduce cost of products and simplify product structure by same signal wire.
Description of drawings
Fig. 1 is the theory diagram of existing tire pressure monitoring system;
Fig. 2 is the theory diagram of tire pressure monitoring system of the present utility model;
Fig. 3 is the circuit diagram of two-way communication compatible circuit part in the receiver circuit of the present utility model;
Fig. 4 is the flow chart of pressure monitoring system receiver of the present utility model.
Embodiment
Consult Fig. 2, tire pressure monitoring system of the present utility model comprises sensor and receiver, is separately installed with a sensor on four wheels of car.Receiver comprises microprocessor MCU1, microprocessor MCU2, high frequency receiving element 3 and the low frequencies unit that is made of low frequency driving circuit 41 and low frequencies circuit 42.
High frequency receiving element 3 comprises high-frequency data receiving end 303 and high-frequency signal demodulation module 31.The high-frequency data that high-frequency signal demodulation module 31 is used for receiving converts data-signal to and sends.Microprocessor MCU1 comprises data-signal input end 110, low frequency signal output terminal 11 and output module 12.Data-signal input end 110 receives the data-signal that high-frequency signal demodulation module 31 sends.Microprocessor MCU2 comprises control signal output ends 21 and load module 22, and load module 22 links to each other with output module 12.Low frequency driving circuit 41 links to each other with low frequency signal output terminal 11 with control signal output ends 21.Link to each other by a signal wire between low frequency driving circuit 41 and the low frequencies circuit 42.This signal wire one end connects low frequencies circuit 42 and high frequency receiving antenna 32, and the other end connects low frequency driving circuit 41 and high frequency receiving element 3.
The utility model characteristics just are the two-way communication compatible circuit.The corresponding sensor of each two-way communication compatible circuit sends low frequency signal and receives high-frequency signal from respective sensor to sensor.Consult Fig. 3, the two-way communication compatible circuit is made up of the driving circuit 41 and the radiating circuit 42 of circuit connection successively.Driving circuit 41 is made up of Sheffer stroke gate U1 and two MOS transistor Q1, Q2, and wherein MOS transistor Q1 connects power supply, MOS transistor Q2 ground connection.Radiating circuit 42 is by the low frequencies coil L1 that links to each other successively, and capacitor C 1 and resistance R 1 are formed, resistance R 1 ground connection wherein, and low frequencies coil L1 connects signal wire one end, and the contact between MOS transistor Q1, the Q2 connects the signal wire other end.The end that signal wire connects low frequencies coil L1 connects high frequency receiving antenna 32, and signal wire connects an end of the contact between MOS transistor Q1, the Q2 through capacitor C 2, and signal amplification circuit 43 connects the high frequency receiving element.High-frequency signal is 433.92MHz, and capacitor C 2 sizes are 100Pf to 500Pf.
Below by Fig. 4, the program of pressure monitoring system receiver of the present utility model is elaborated.
Consult Fig. 4, at first, receiver powers on, and reads tire encoded radio and various data from EEPROM, respectively to low frequency signal left front, left back, right front, that off hind wheel sends 125KHz.At this moment, if the input of high frequency wireless data is arranged, then whether the judgment data check and correction is normal; If do not have the input of high frequency wireless data and do not need tire to discern automatically, return and continue to have judged whether the input of high frequency wireless data; If do not have high frequency wireless data input but need tire to discern automatically, then carry out tire and return after the identification automatically and continue to have judged whether the input of high frequency wireless data.If the data check and correction is undesired and do not need tire to discern automatically, returns and continue to have judged whether the input of high frequency wireless data; If data are proofreaded undesired but needed tire to discern automatically, then carry out returning after tire is discerned automatically and continue to have judged whether the input of high frequency wireless data.The data check and correction is normally then compared with the tire encoded radio, if do not belong to this car coding, returns continuation respectively to low frequency signal left front, left back, right front, that off hind wheel sends 125KHz; If belong to this car coding, then send the order of the 125KHz of " having received signal " to corresponding tire sensor, carry out data processing according to different kinds of tyre.
Though embodiment of the present utility model has illustrated and has been shown and describes, should be appreciated that and know the various modifications that those skilled in the art make the utility model or substitute, do not break away from protection domain of the present utility model.
Claims (5)
1, two-way communication compatible circuit in a kind of tire pressure monitoring system comprises the low frequency driving circuit that connects with circuit successively, signal wire and low frequencies circuit; The low frequency driving circuit receives low-frequency control signal; It is characterized in that described signal wire connects low frequencies circuit one end and connects high frequency receiving antenna, described signal wire connects low frequency driving circuit one end and connects the high frequency receiving element through electric capacity.
2, two-way communication compatible circuit in the tire pressure monitoring system as claimed in claim 1 is characterized in that, described capacitance size is 100Pf to 500Pf.
3, two-way communication compatible circuit in the tire pressure monitoring system as claimed in claim 1 or 2 is characterized in that, is provided with amplifying circuit in the described high frequency receiving circuit.
4, two-way communication compatible circuit in the tire pressure monitoring system as claimed in claim 3 is characterized in that, described low frequency driving circuit is made of Sheffer stroke gate and two low frequency driving tubes.
5, two-way communication compatible circuit in the tire pressure monitoring system as claimed in claim 4 is characterized in that, described signal wire connects low frequency driving circuit one end between two low frequency driving tube lines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520040478 CN2781479Y (en) | 2005-03-29 | 2005-03-29 | Two-way channel communication compatible circuit in tyre pressure monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520040478 CN2781479Y (en) | 2005-03-29 | 2005-03-29 | Two-way channel communication compatible circuit in tyre pressure monitoring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2781479Y true CN2781479Y (en) | 2006-05-17 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520040478 Expired - Fee Related CN2781479Y (en) | 2005-03-29 | 2005-03-29 | Two-way channel communication compatible circuit in tyre pressure monitoring system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2781479Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102431398A (en) * | 2011-10-20 | 2012-05-02 | 惠州市德赛西威汽车电子有限公司 | Tyre pressure monitoring system and self-adapting matching method thereof |
| CN102639342A (en) * | 2009-12-15 | 2012-08-15 | 法国欧陆汽车公司 | Method for adjusting a time base for a tire pressure measurement unit |
| CN104786753A (en) * | 2015-03-25 | 2015-07-22 | 王方圆 | Tire pressure monitoring system with signal matching device |
-
2005
- 2005-03-29 CN CN 200520040478 patent/CN2781479Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102639342A (en) * | 2009-12-15 | 2012-08-15 | 法国欧陆汽车公司 | Method for adjusting a time base for a tire pressure measurement unit |
| CN102639342B (en) * | 2009-12-15 | 2016-03-09 | 法国欧陆汽车公司 | For regulating wheel tire pressure measuring unit time base method |
| CN102431398A (en) * | 2011-10-20 | 2012-05-02 | 惠州市德赛西威汽车电子有限公司 | Tyre pressure monitoring system and self-adapting matching method thereof |
| CN104786753A (en) * | 2015-03-25 | 2015-07-22 | 王方圆 | Tire pressure monitoring system with signal matching device |
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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: 20060517 Termination date: 20100329 |