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Method and device for measuring packet loss rate of tire pressure monitoring system

A technology of a tire pressure monitoring system and a measurement method, which is applied in tire measurement, transportation and packaging, error detection/prevention using a signal quality detector, etc., and can solve problems such as measurement of packet loss rate that cannot be applied to tire pressure monitoring, Achieve the effect of simple structure and low cost

Inactive Publication Date: 2009-12-09
FORYOU GENERAL ELECTRONICS
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AI Technical Summary

Problems solved by technology

At present, there are many methods for bit error rate measurement in the communication field, but none of them can be applied to the measurement of packet loss rate in tire pressure monitoring

Method used

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  • Method and device for measuring packet loss rate of tire pressure monitoring system
  • Method and device for measuring packet loss rate of tire pressure monitoring system
  • Method and device for measuring packet loss rate of tire pressure monitoring system

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Embodiment Construction

[0021] The concrete implementation process of the inventive method comprises the following steps:

[0022] 1. First select the power of the test signal, modulate the test signal (digital coded signal) sent by the signal source into a radio frequency signal, and send it to the shielding device; at the same time, send the flag signal generated by the signal source indicating that the message is sent to the decoding device, as a calibration signal;

[0023] 2. Then send a fixed noise signal to the shielding device, and the noise signal is coupled with the above radio frequency signal in the shielding device; the shielding device is to keep the interference noise received during the measurement process constant, thereby ensuring the reproducibility of the test;

[0024] 3. Finally, a receiving demodulation device is set in the shielding device to receive and demodulate the above-mentioned noise-coupled radio frequency signal; and send it to the decoding device for comparison with ...

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Abstract

The invention disclosed a method for measuring the packet loss rate of a tire pressure monitoring system. A digital coding test signal is modulated to a radio frequency (RF) signal, meanwhile, a flag signal in a test signal source showing that a message is sent out is used as a calibrating signal; a fixed noise signal is adopted to couple with the RF signal, and then the coupled signal is demodulated and decoded in sequence, and is compared with the calibration signal in the decoding process so as to obtain a packet loss rate. The packet loss rate measured by the method of the invention can accurately and scientifically reflect the RF performance of a receiving demodulation device; in addition, expensive instrument and equipment are not required, and conventional instruments can be chosenby each module therefore, the cost is low and the structure is simple.

Description

technical field [0001] The invention relates to a method for measuring the packet loss rate, in particular to a method for measuring the packet loss rate of a tire pressure monitoring system in the automotive field and a device thereof. Background technique [0002] The tire pressure monitoring system is a measurement technology that is seriously related to driving safety. Its technology has been developed in the past five years, mainly including micro-electromechanical technology and radio frequency technology. The tire pressure monitoring system is mainly used to monitor tire pressure and temperature and generate early warning information. It includes a signal sending end and a receiving end. The sending end is installed in the car tire or placed outside the tire through the valve. The receiving end is usually installed on the car instrument on top of the deck or embedded in the dashboard. Due to the harsh environment at the sending end, mainly manifested in the high-spee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/20B60C23/02
Inventor 陈雄宏钟文涛李秀军
Owner FORYOU GENERAL ELECTRONICS
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