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High frequency transmission circuit for tire sensor

A technology of transmitting circuits and sensors, applied in tire measurement, tire parts, automobile tire testing, etc., can solve problems such as stray power exceeding the standard, reducing the main transmission frequency, and unable to solve the main transmission frequency.

Inactive Publication Date: 2009-06-10
上海泰好电子科技有限公司
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0008] In order to meet the specifications of the State Radio Administration's "Technical Requirements for Micropower (Short-range) Radio Equipment", the method of reducing the main transmission frequency is usually used during testing, which still cannot solve the problem of specifying the main transmission frequency in the automotive industry, such as The stray power exceeds the standard phenomenon at 433.92MHz

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  • High frequency transmission circuit for tire sensor
  • High frequency transmission circuit for tire sensor
  • High frequency transmission circuit for tire sensor

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Embodiment Construction

[0020] The following is based on figure 2 , give a preferred embodiment of the present invention, and give a detailed description, so that the functions and characteristics of the present invention can be better understood.

[0021] figure 2 It is a sensor high-frequency transmitting circuit with a resonant part of the present invention. As shown in the figure, the high-frequency transmitting circuit of the tire sensor of the present invention includes a high-frequency transmitting chip, a transmitting antenna and a power supply VCC. The power amplification output terminal PA_OUT of the high-frequency transmitting chip is connected to the power supply VCC through a resonant circuit, a first inductor L10 and a first resistor R10 in sequence. The resonant circuit is composed of a second capacitor C1, a second inductor L1 and a second resistor R1 connected in parallel. It is also possible to consider a parallel LC circuit composed of only the second capacitor C1 and the seco...

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Abstract

The invention relates to a high-frequency transmitting circuit of a tyre sensor. The circuit comprises a high-frequency transmitting chip, a transmitting antenna and a power supply, wherein a power amplification output end of the high-frequency transmitting chip is connected with the antenna through an LC series circuit. The high-frequency transmitting circuit is characterized in that a resonance circuit is arranged between the power amplification output end of the high-frequency transmitting chip and the power supply. The high-frequency transmitting circuit can greatly reduce stray power during frequency multiplication under the condition of transmitting identical main power.

Description

technical field [0001] The invention relates to a tire sensor in a system for monitoring the pressure, speed and temperature of automobile tires, in particular to a high-frequency transmitting circuit in the tire sensor. Background technique [0002] For ordinary cars, the tire pressure has a great influence on the tire wear. Too much or too little tire pressure will also increase the fuel consumption of the vehicle, and continuous underpressure will shorten the life of the tire by as much as 50%. In addition, deviations in tire pressure can lead to tire ruptures and vehicle fires, so many drivers spend a lot of time regularly checking tire pressure. [0003] In view of the above reasons, with the continuous development of the automobile industry, various systems for monitoring the pressure, speed, temperature, etc. of automobile tires, that is, TPMS systems, have emerged as the times require. Usually the TPMS system is composed of the sensor equipment mounted on the tire ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/04G01M17/02B60C23/04
Inventor 金晓干吴银虎
Owner 上海泰好电子科技有限公司