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Tire air pressure monitoring device and tire air pressure monitoring method

一种监视装置、轮胎的技术，应用在轮胎测量、轮胎零部件、运输和包装等方向，能够解决发送信号冲突、无法接收多个轮胎气压信息等问题，达到简化结构的效果

Inactive Publication Date: 2012-03-14
NISSAN MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since there are multiple tires on the vehicle, when multiple transmitters transmit air pressure information at the same time, the sending signal (receiving signal) will conflict, and the receiver cannot correctly receive multiple tire air pressure information

Method used

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  • Tire air pressure monitoring device and tire air pressure monitoring method
  • Tire air pressure monitoring device and tire air pressure monitoring method
  • Tire air pressure monitoring device and tire air pressure monitoring method

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0027] figure 1 It is a schematic configuration diagram of the tire air pressure monitoring device 1 included in the automobile 1A. exist figure 1 In this example, the transmission unit 2 is provided for each of the four tires T of the automobile 1A. The transmission unit 2FL is provided on the left front tire T, the transmission unit 2FR is provided on the right front tire T, the transmission unit 2RL is provided on the left rear tire T, and the transmission unit 2RR is provided on the right rear tire T. In addition, in the following, when the transmission units 2FL, 2FR, 2RL, and 2RR are described collectively without distinguishing them, only the transmission unit 2 will be described. These transmission units 2 include a pressure sensor 201, a transmitter 202, an acceleration sensor 203, a period calculation unit 204, a period disturbance detection unit 205, a transmission timing adjustment unit 206, a power supply 207, a storage unit 208, and a temperature sensor 209. ...

no. 2 approach

[0077] Next, a second embodiment will be described. With respect to the first embodiment, the second embodiment transmits the pressure information by setting the end of the cycle disturbance as the adjustment start time of the transmission period. In addition, when the period of cycle disturbance is very long, the timeout period is set so that the transmission will not be delayed due to the time being too long, and the pressure information is forcibly transmitted if the period disturbance does not end until the timeout.

[0078] exist Figure 7 In , the state b in which the cycle disorder ends within the timeout time t2 and the state c in which the cycle disorder fails to end within the timeout time t2 are shown in a time diagram. First, state b will be described in terms of time series. First, at point 7-1 to point 7-2, the tire rotates in a steady state. The acceleration sensor 203 detects the rotation state as an acceleration, and the cycle calculation unit 204 extracts ...

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PUM

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Abstract

A tire air pressure monitoring device and a tire air pressure monitoring method can reduce collisions between transmitted signals from multiple transmitters without setting special equipments. The tire air pressure monitoring device includes: an air pressure sensor (201) used for sensing the air pressure of the tire; a transmitter (202) used for obtaining a tire air pressure signal by adopting the above air pressure sensor (201) arranged in the tire of a vehicle and sending the signal to a receiving device (3-1); a acceleration sensor (203) used for sensing a rotary position of the tire; a period calculating part (204) used for calculating the period of rotation of the tire; a period disruption sensing part (205) used for sensing disruption of an output signal of the period calculating part (204); and a transmitting period adjusting part (206) used for executing a transmitting command according to the period disruption sensed by the period disruption sensing part (205), wherein in the case of sensing the disruption of the period of rotation of the tire, the transmitting period adjusting part (206) makes the air pressure signal transmit from the transmitter (202) to the receiving device (3-1).

Description

technical field [0001] The invention relates to a tire pressure monitoring device and a tire pressure monitoring method. Background technique [0002] The air pressure of the tire mounted on the vehicle is detected by the air pressure sensor, and the detected air pressure information is transmitted from the transmitter to the receiver. Since multiple tires are installed on the vehicle, when multiple transmitters transmit air pressure information at the same time, the transmitted signals (received signals) will conflict, and the multiple tire air pressure information cannot be correctly received by the receiver. In order to reduce such received signal collisions, among the techniques described in Patent Document 1, a technique is disclosed in which transmission timings of transmissions from a plurality of transmitters are adjusted by causing the transmitters to generate pseudo-random numbers. Contents of the invention [0003] The problem to be solved by the invention ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C23/04
CPCB60C23/0459B60C23/0488B60C23/0489
Inventor 前川贵洋寺田昌司
Owner NISSAN MOTOR CO LTD