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Piezoresistive-magnetic-coupling-type tire air pressure detection device

An air pressure detection and coupling technology, applied in tire measurement, tire parts, transportation and packaging, etc., can solve the problems of battery replacement, complex circuit structure, etc., and achieve the effect of simple circuit

Inactive Publication Date: 2016-04-20
HUBEI UNIV OF ARTS & SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage is that the circuit structure is complicated, and the battery needs to be replaced frequently.

Method used

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  • Piezoresistive-magnetic-coupling-type tire air pressure detection device

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Embodiment Construction

[0009] figure 1 As shown: the expansion film 1 is connected and fixed with the gas circuit 10, the expansion film 1 is connected and fixed with the pressure sensor 9, the pressure sensor 9 is connected and fixed with the secondary coil 2, the primary coil 3 is connected with the signal conditioning circuit 8 through the AC current sampling circuit 4, The signal conditioning circuit 8 is connected to the system control circuit 6 through the comparator circuit 5 , and the system control circuit 6 is also connected to the alarm circuit 7 .

[0010] The working principle of the present invention is as follows: the pressure sensor 9 and the secondary coil 2 form a loop. When the tire pressure is at the standard pressure, the expansion of the expansion film 1 causes the pressure sensor 9 to receive an appropriate pressure, the secondary coil 2 and the primary coil 3 are magnetically coupled, and the current in the primary coil 3 is sampled by the AC current sampling circuit 4. Afte...

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Abstract

The present invention provides a piezoresistive-magnetic-coupling-type tire air pressure detecting device, an expansion film is fixed by connection with a gas path, the expansion film is fixed by connection with a pressure sensor, the pressure sensor is fixed by connection with a secondary coil, a first coil is connected with a signal processing circuit by an alternating current sampling circuit, the signal processing circuit is connected with a system control circuit by a comparator circuit, and the system control circuit is also connected with an alarm circuit. The real-time on-line tire air pressure detection can be achieved by the arrangement without installation of a power supply in a tire, the circuit is simple, and the installation is easy.

Description

technical field [0001] The invention relates to a vehicle safety guarantee technology, in particular to a piezoresistive magnetic coupling tire air pressure detection device. Background technique [0002] During the running of the vehicle, too low or too high tire pressure will affect the safety of the vehicle, so it is very necessary to develop an online real-time detection system for tire pressure. The existing tire pressure detection system adopts wireless transceiver or electromagnetic. Its disadvantage is that the circuit structure is complicated, and the battery needs to be replaced frequently. Contents of the invention [0003] The object of the present invention is to provide a piezoresistive magnetic coupling type tire air pressure detection device, which adopts a mutual induction coil, an expansion film and a pressure sensor to detect a tire air pressure detection device. The tire air pressure detection device does not need to install a power supply in the tire...

Claims

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Application Information

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IPC IPC(8): B60C23/04
Inventor 蔡兵
Owner HUBEI UNIV OF ARTS & SCI