CN1480353A - code learning device of tire pressure monitor - Google Patents

Abstract

The present invention relates to a tire pressure monitor code learning device installed in a vehicle, comprising at least one sensor electronic module installed in the tire of the vehicle for sensing the state of the tire and sending the state by means of a radio signal. The sensor electronic module also has a transponder that can sense a radio wave of a first frequency to generate electricity for sending a specific code of the sensor electronic module.

Description

Tire pressure monitor learning code device

technical field

The invention relates to a code-learning device for a tire pressure monitor, in particular to a code-learning device for a tire pressure monitor, which is used for monitoring the state inside a tire and has a simplified code-learning process.

Background technique

Tire pressure monitoring devices are known in the prior art. For example, the applicant filed the application No. 089117036 in Taiwan on August 22, 2000 "Tire Pressure Monitoring Method and Device for Pneumatic Tires", which discloses a tire pressure monitoring device with a sensor module, which is installed separately In the pneumatic tire, it is used to sense the state of the tire, and after encoding the sensed tire state, send it as a radio frequency signal, and a decoding module is used to receive the radio frequency signal emitted by the sensor module and determine the pneumatic tire usage.

However, in the above-mentioned patent application, when the decoding module of the vehicle confirms the code with the sensor module inside each pneumatic tire, the operator must deflate each pneumatic tire of the vehicle, and use the rapid change of the tire pressure After being confirmed by the decoding module, the position of the tire installed on the sensor module can be confirmed. Afterwards, the tire must be reinflated before the vehicle can be used again. Obviously, this process is quite time-consuming and very inconvenient and complicated.

In addition, U.S. Patent No. 6,369,703 "Tire pressure monitor and location identification system" (Tire pressure monitor and location identification system) issued to Lill on April 9, 2002 discloses a tire pressure monitoring and identification system for a vehicle, which Contains at least one tire pressure monitor operatively connected to each tire, a plurality of transponders, and a central system receiver. Each transponder, which has a unique identification code, is affixed to the vehicle proximate to a predetermined tire of the vehicle. In operation, the tire pressure monitor transmits tire pressure data to its corresponding transponder, and the transponder adds its unique location identification code to the tire pressure data and transmits the data to the central system receiver. The central system receiver selectively displays the tire pressure data by tire location. However, the tire pressure monitoring of this patent is complicated and susceptible to interference from external electromagnetic waves.

As mentioned above, the aforementioned code learning method cannot provide a fast and effective code learning (code learning) mode, so it is necessary to provide a tire pressure monitor code learning device and method thereof, so that the tire pressure The code learning process of the monitor is simpler and faster.

Contents of the invention

The main purpose of the present invention is to overcome the deficiencies and defects of the prior art, and provide a tire pressure monitor learning device for monitoring the status of the tire, and the monitoring device can easily confirm the tire installed on the tire monitor s position.

The secondary purpose of the present invention is to provide a code learning method for a tire pressure monitor, so that the user can confirm the position of the tire installed on the tire monitor without complicated operations.

To achieve the above purpose, the present invention provides a code learning device for a tire pressure monitor, which is installed in a vehicle and includes at least one sensor electronic module installed in the tire of the vehicle to sense the state of the tire, and This status is transmitted by means of radio signals. The sensor electronic module has a transponder, which can induce a radio wave with a first frequency to generate power for sending the specific code of the sensor electronic module. The code learning device of the tire pressure monitor further includes a reader for sending the radio wave of the first frequency and receiving the radio wave signal of the specific code, and a tire monitoring electronic module installed in the vehicle, The status sent by the sensor electronic module in the tire can be received, and the specific code of the sensor electronic module can be obtained by the reader.

The present invention also provides a code learning method for a tire pressure monitor, which includes the following steps: providing a plurality of sensor electronic modules, which are respectively installed in a plurality of tires of a vehicle, to sense the state of the tires, and use radio signals to Sending the status; providing a plurality of transponders, respectively installed in the sensor electronic module, to induce a first frequency radio wave to generate power, and to send the specific code of the sensor electronic module; and when approaching the sensor electronic module At one of the plurality of tires of the vehicle, transmitting radio waves of the first frequency causes the transponder in the tire to generate power and transmit a specific code of the sensor electronic module in the tire.

To sum up, according to the tire monitor of the present invention, due to the interrogator, the user can easily confirm the specific code of the sensor electronic module installed in the tire. Furthermore, the interrogator does not need an additional power supply device, so the service life of the sensor electronic module will not be affected.

Description of drawings

Fig. 1 is a block diagram of a code learning device of a tire pressure monitor according to the present invention;

FIG. 2 is a schematic diagram of an integrated circuit and an inductor-capacitor parallel resonant circuit in the interrogator of FIG. 1 .

Explanation of symbols in the figure

1 Learning code device for tire pressure monitor

10a Sensor Electronics Module 10b Sensor Electronics Module

10c Sensor Electronics Module 10d Sensor Electronics Module

12 interrogator

12a Interrogator 12b Interrogator

12c Interrogator 12d Interrogator

13a Antenna 13b Antenna

13c Antenna 13d Antenna

14a Sensor ASIC 12b Sensor ASIC

14c Sensor ASIC 12d Sensor ASIC

20 Reader 22 Microprocessor

24a Send key 24b Send key

24c Send key 24d Send key

26 Transceiver 27 Antenna

28 memory 30 tire monitoring electronic module

31 memory

32 Microprocessor 34 Receiver

35 Antenna 36 Display unit

40 integrated circuit 42 Vcc pin

44 GND pin

50 capacitor-inductor parallel resonant circuit

Detailed ways

The specific implementation manner of the present invention will be described in detail below in conjunction with the accompanying drawings and examples.

Please refer to FIG. 1 , which shows a code learning device 1 for a tire pressure monitor with a code learning function according to the present invention. The code learning device 1 of the tire pressure monitor includes a plurality of sensor electric modules (sensor electric modules) 10a, 10b, 10c, 10d, and a tire monitoring electric module (tire monitoring electric module) 30. The tire monitoring electronic module 30 includes a microprocessor 32 , a receiver 34 with an antenna 35 , and a display unit 36 .

The sensor electronic modules 10a, 10b, 10c, 10d are respectively installed near the left front wheel (FL), right front wheel (FR), left rear wheel (RL) and right rear wheel (RR) of a vehicle. The sensor electronic modules 10a, 10b, 10c, 10d have sensor ASIC (Sensor Application-Specific Integrated Circuit) 14a, 14b, 14c, 14d for sensing the state of the tires of the vehicle, and antennas 13a, 13b, 13c , 13d, for sending the status. In more detail, the sensor ASIC 14a-d is used to sense the state of the corresponding tire, encode the sensed tire state, and send a radio frequency signal through the antenna 13a-d, wherein the tire state includes the tire pressure and temperature. The sensor ASIC also has a specific code and can be sent along with the radio frequency signal. A similar monitoring device has been disclosed in Taiwan Application No. 089117036 "Tire Pressure Monitoring Method and Device for Pneumatic Tires" filed by the applicant on August 22, 2000. This application is incorporated by reference in its entirety.

The code learning device 1 for a tire pressure monitor according to the present invention further includes a hand-held reader (hand-held reader) 20, and the sensor electronic modules 10a, 10b, 10c, 10d respectively include interrogators 12a, 12b , 12c, 12d. The handheld reader 20 includes a microprocessor 22 , a plurality of sending keys 24 a , 24 b , 24 c , 24 d , a transceiver 26 with an antenna 27 , and a memory 28 . Those skilled in the art will understand that the interrogator 12a-d can sense radio waves of a specified frequency to generate power to drive an integrated circuit, and thereby transmit the specific code of the sensor ASIC. Also, the handheld reader 20 has transmission keys 24a-d, and when the transmission keys 24a-d are pressed, the handheld reader 20 will transmit radio waves of the specified frequency.

According to the code learning device 1 of the tire pressure monitor of the present invention, the code learning process must first be performed to confirm the specific code of the sensing electronic module installed in the individual tire. During the code learning process, for example, the user can hold the hand-held reader 20 and approach the right front wheel of the vehicle, and press the sending key 24a to send radio waves of the specified frequency. The transponder 12a senses the radio wave, and generates power to drive an integrated circuit for sending the specific code of the sensor ASIC 14a through another radio frequency signal. The transceiver 26 of the handheld reader 20 can receive the RF signal and store the specific code of the sensor ASIC 14 a in the right front wheel in the memory 28 . The user approaches other tires respectively and presses the corresponding sending keys 24b, 24c, 24d to obtain the specific codes of the sensor ASICs installed in all tires. Afterwards, the handheld reader 20 can send the specific codes of individual tires to the memory 31 of the tire monitoring electronic module 30 by means of radio waves or transmission lines, so that the tire monitoring electronic module 30 can receive the specific codes of individual tires. The sensor electronic module 10a-d tire status signal, and can identify the tire that sent the signal. Furthermore, the tire monitoring electronic module 30 also transmits the status of the tire to the handheld reader 20 through radio waves or transmission lines, so as to provide a remote monitoring function.

Also, according to an embodiment of the present invention, when the user uses the handheld reader 20 to activate the transponder, the strength of the radio wave of the specified frequency sent by the handheld reader 20 must be Restricted so that when the handheld reader 20 approaches the interrogator (i.e. tire) within 7-20 cm, the intensity of the radio wave is sufficient to activate the interrogator to avoid being affected by other tires .

In more detail, as shown in FIG. 2 , the interrogator 12 is provided with an integrated circuit 40 and a capacitor-inductance parallel resonant circuit 50 , and the circuit 50 is electrically connected to the Vcc (power supply) of the integrated circuit 40 respectively. Pin 42 and GND (ground) pin 44 . The resonant frequency of the resonant circuit 50 is the specified frequency. Therefore, when the handheld reader 20 is close to the resonant circuit 50 and sends radio waves of the specified frequency, the resonant circuit 50 will induce the radio waves to generate a voltage to drive the integrated circuit 40 to send another radio frequency signal, It contains the specific code of the sensor ASIC, which is received by the handheld reader 20 .

In certain cases, the specified frequency of the interrogator 12a-d is about 125KHz, and the frequency of the RF signal transmitted by the sensor electronic module 10a-10d and the interrogator 12a-12d is about 433.92MHz or 315MHz .

Although the present invention has been disclosed by the aforementioned preferred embodiments, it is not intended to limit the present invention. Any skilled person can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be defined by the claims.

Claims (21)

1. the sign indicating number device of a tire pressure monitor is installed in the vehicle, it is characterized in that, comprising:

At least one inductor electronic module, be installed in the tire of this vehicle, in order to respond to the state of this tire, and send this state by radio signal, and this inductor electronic module has an interrogator-responsor (transponder), the radiowave that can respond to a first frequency produces electric power, in order to send the specific coding of this inductor electronic module.

2. the sign indicating number device of tire pressure monitor as claimed in claim 1 is characterized in that other comprises:

One reader in order to sending the radiowave of this first frequency, and receives the radio wave signal of this specific coding.

3. the sign indicating number device of tire pressure monitor as claimed in claim 2 is characterized in that other comprises:

One tire monitoring electronic module is installed in this vehicle, can receive this state that this inductor electronic module in this tire is sent, and can be obtained this specific coding signal of this inductor electronic module by this reader.

4. the sign indicating number device of tire pressure monitor as claimed in claim 1 is characterized in that, this interrogator-responsor comprises one electric capacity-inductance antiresonant circuit.

5. the sign indicating number device of tire pressure monitor as claimed in claim 3 is characterized in that, this tire monitoring modular receives this specific coding signal via a radiowave.

6. the sign indicating number device of tire pressure monitor as claimed in claim 3 is characterized in that, this tire monitoring modular receives this specific coding signal via a transmission line.

7. the sign indicating number device of tire pressure monitor as claimed in claim 3 is characterized in that, this tire monitoring modular has a memory device in addition, in order to store this specific coding.

8. the sign indicating number device of tire pressure monitor as claimed in claim 1 is characterized in that this first frequency is about 125KHz.

9. the sign indicating number device of tire pressure monitor as claimed in claim 1 is characterized in that, this inductor electronic module sends this state of this tire by a second frequency, and this interrogator-responsor sends the specific coding of this inductor electronic module by this first frequency.

10. the sign indicating number device of tire pressure monitor as claimed in claim 9 is characterized in that this second frequency is about 433.92MHz.

11. the sign indicating number device of tire pressure monitor as claimed in claim 9 is characterized in that this second frequency is about 315MHz.

12. the sign indicating number device of tire pressure monitor as claimed in claim 1 is characterized in that, selects in the group that this tire condition is made of tire pressure, tyre temperature or its combination.

13. the code method of a tire pressure monitor is characterized in that, comprises that step is as follows:

A plurality of inductor electronic modules are provided, are installed on respectively in a plurality of tires of a vehicle, in order to responding to the state of this tire, and send this state by radio signal;

A plurality of interrogator-responsors are provided, are installed on respectively in this inductor electronic module, produce electric power in order to the radiowave of responding to a first frequency, and in order to send the specific coding of this inductor electronic module; And

Person place one of near these a plurality of tires of this vehicle sends the radiowave of this first frequency, makes this interrogator-responsor in this tire produce electric power, and sends the specific coding of this inductor electronic module in this tire.

14. the code method of tire pressure monitor as claimed in claim 13 is characterized in that other comprises step:

Write down the relation between the tire location of this specific coding and this vehicle;

One tire monitoring electronic module is provided, is installed in this vehicle, can receive the tire condition signal of this inductor electronic module in this tire; And

With the relation between the tire location of this specific coding and this vehicle, be sent in this tire monitoring electronic module.

15. the code method of tire pressure monitor as claimed in claim 13 is characterized in that, in the step of the radiowave that sends this first frequency, be in apart from this tire about 7 to about 20 centimeters, send the radiowave of this first frequency.

16. the code method of tire pressure monitor as claimed in claim 13 is characterized in that, this interrogator-responsor comprises one electric capacity-inductance antiresonant circuit, can respond to the radiowave of this first frequency and produces electric power.

17. the code method of tire pressure monitor as claimed in claim 13 is characterized in that this first frequency is about 125KHz.

18. the code method of tire pressure monitor as claimed in claim 13 is characterized in that, this inductor electronic module sends this state of this tire by a second frequency, and this interrogator-responsor sends the specific coding of this inductor electronic module by this first frequency.

19. the code method of tire pressure monitor as claimed in claim 18 is characterized in that this second frequency is about 433.92MHz.

20. the code method of tire pressure monitor as claimed in claim 18 is characterized in that this second frequency is about 315MHz.

21. the code method of tire pressure monitor as claimed in claim 13 is characterized in that, selects in the group that this state of this tire is made of tire pressure, tyre temperature or its combination.

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