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Multifunctional sensor integrated chip for tyre pressure and temperature monitoring system

A temperature sensor and monitoring system technology, applied in tire measurement, instruments, measurement devices, etc., can solve the problems of difficult cantilever beam thickness and size, accurate processing control, reliability, and stability that cannot fully meet people's requirements, etc. Achieve the effect of improving reliability and stability, strong high temperature resistance and corrosion resistance

Active Publication Date: 2006-11-22
WUHAN FINEMEMS
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of such a pressure sensor is that there is no built-in overpressure protection, so the cantilever beam is prone to cracking
In addition, the thickness and size of the cantilever beams are difficult to accurately control through conventional bulk silicon processing
In addition, the tire pressure monitoring system is to install the pressure sensor and temperature sensor on the tire, but its disadvantage is that the system does not know whether the motor vehicle is moving, or due to uneven wear, the condition of the spare tire, replacement tire and tire change, etc. When the driver does not know which tire is faulty, it is impossible to set the initial value for the four tires. The reliability and stability of the existing products cannot fully meet people's requirements.

Method used

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  • Multifunctional sensor integrated chip for tyre pressure and temperature monitoring system
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  • Multifunctional sensor integrated chip for tyre pressure and temperature monitoring system

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Embodiment Construction

[0023] Embodiments of the present invention are further described below in conjunction with the accompanying drawings:

[0024] The invention relates to an intelligent integrated multi-functional sensing system, which is more superior for monitoring tire pressure, temperature, battery voltage, low-frequency signals and tire acceleration systems of motor vehicles. The invention integrates a pressure sensor, an accelerometer, a temperature sensor, and battery voltage on a single chip or multiple chips. Single-chip or multi-chip integrated with integrated circuit packaged in a plastic body or pasted on a circuit board.

[0025] The compact package of the present invention can generate tire pressure signal, temperature signal, battery voltage level, low frequency as initial identification of each tire, and accelerometer induced vibration switch signal. Intelligent control system with integrated circuit. Accelerometers are widely used in the automotive industry, especially in air...

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Abstract

The disclosed multifunctional sensor IC for tyre pressure and temperature monitor system comprises: a pressure sensor with micro-mechanical part protected by silicone gel, an accelerator, a temperature sensor, and an IC all packed in a custom plastic shell. This invention improves system reliability, resistance to hot temperature and corrosion, and stability.

Description

technical field [0001] The invention relates to an automobile tire pressure temperature monitoring system, in particular to a multifunctional sensor integrated chip of the tire pressure temperature monitoring system. technical background [0002] Direct sensing of tire pressure and temperature is one of the most important parts of a monitoring system, and packaging is critical to protect the system's sensor devices in the typical highly corrosive, high-temperature environment found in tires. The sensors of the monitoring system are subject to relatively high accelerations, causing the sensors to detach from the edge of the tire causing stress concentration and reliability issues at the joint interface. The more compact the sensor system, the better the performance and the easier it is to monitor the car tires through the transmitter Case. Since the tire pressure and temperature monitoring system should be installed in the tire, which is a typical highly corrosive and high-t...

Claims

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Application Information

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IPC IPC(8): G01D21/02B60C23/00
Inventor 陈斌刘胜
Owner WUHAN FINEMEMS
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