Method and apparatus for detecting air pressure and temperature of passive automobile tyre

Abstract

The present invention relates to one kind of passive automobile tyre pressure and temperature detecting device. The passive automobile tyre pressure and temperature detecting device consists of detecting alarm processor in the driver's cab, emitting antenna installed over or beside tyre, and responder installed in hub, inside tyre or at air tap; and the responder consists of sensing antenna, pressure sensor, double metal temperature sensor and capacitor integrated together. The emitting antenna is connected via signal wire to the detecting alarm processor, and the power source wire of the detecting alarm processor is connected to battery in automobile. The present invention can show the tyre pressure and temperature accurately and send alarm signal, and the system is simple in structure, convenient in maintenance, low in cost and excellent in performance.

Description

technical field [0001] The invention relates to a method and a device for wireless induction detection of air pressure and temperature of automobile tires, and automatic alarm when the tires leak or heat up at high temperature. Background technique [0002] Tires are an important part of a car, and its performance will directly affect the driveability, passability, ride comfort, stability, safety and comfort of the car. When the car is driving, the following factors are the key to the safety of the car: [0003] 1. Tire leaks. The tires are pierced by iron nails or sharp objects, resulting in air leaks and punctures. [0004] 2. Insufficient tire pressure. When the car is running at high speed (speed exceeds 120km / h), insufficient tire pressure will easily cause the carcass to "resonate" and cause a huge resonance force. If the tire is not strong enough or has "injury", it will Tire blowouts are easy; in addition, insufficient air pressure increases the sinkage of the tire...

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Problems solved by technology

[0003] 1. Tire leaks. The tires are pierced by iron nails or sharp objects, resulting in air leaks and punctures

[0004] 2. Insufficient tire pressure. When the car is running at high speed (speed exceeds 120km / h), insufficient tire pressure will easily cause the carcass to "resonate" and cause a huge resonance force. If the tire is not strong enough or has "injury", it will Tires are prone to blowout; in addition, insufficient air pressure will increase the sinkage of the tire, which will easily cause the tire wall to touch the ground when turning sharply, and the tire wall is the weakest part of the tire, and the tire wall will also cause a blowout

[0005] 3. When the tire pressure is insufficient or the walking condition is poor, it is prone to high temperature and heat, its strength and tensile and anti-wear capabilities will decrease, and the tire will also cause a puncture

[0008] Known from the above-mentioned published documents and patents, most of the alarm devices are equipped with pressure detection and wireless transmitting devices on the air nozzles of the tires, all of which need to be equipped with batteries, so that the weight of the device is relatively large, and the wheels need to be rebalanced. , and the usual operating temperature of the battery is less than 40 degrees, and the maximum operating temperature of the lithium battery is only 60 degrees, which is easily damaged in the high temperature of summer, so these devices have little practical value, so they have not been widely used, so at present Few of them are really applied to automobile tire leak alarm

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