According to the ministry of public security statistics, 70% of the domestic highway traffic accident is caused by a flat tire, and travels at 120 kilometers per hour, from the flat tire to spiral out of control, the driver's reaction control time is only about 3 seconds, and at 160 kilometers per hour above blowout accident death rate close to 100%.

Is car tire legs and feet, many owners in order to be able to timely grasp the tyre situation can choose to install tire pressure monitoring and early warning. So how the equipment works?

Tire pressure monitoring system basic principle:

Tire pressure monitoring system consists of two parts, one is alarm display (including display, a central receiver and alarm buzzer), 2 it is tire pressure sensor (including inner and outer).

Alarm display are more concise and beautiful, can receive and display the four tire air pressure data, generally need to connect the car to finish power supply power supply.

Sensors to each wheel, which has two kinds of external and internal, appearance, while small embedded in the pressure test device, wireless transmission device, and long life battery unit.

As the car pulled away, installed in each sensor will tire pressure tire temperature data through wireless signal transmission to the central receiver, such as alarm monitor receives the data after the tire pressure tire temperature data to make the analysis judgment, and according to the situation for display and warning.

The internal and external sensors

Understand the basic working principle of the tire pressure detection system, it is easy to understand, the sensor is the core device. Discuss below, the built-in sensor and external sensor differences and advantages and disadvantages.

Both internal and external, basic is the same as the core, the differences mainly produced by each cell and installation environment.

Ease of installation:

External sensors installed in the tire valve mouth, operation is very simple, basically, users to buy back their can be installed. Built-in sensors installed inside the tyre, need to unload the tyres, installed after the need to do dynamic balance, process is more troublesome.

Sensing accuracy:

Built-in sensors can accurate induction tire pressure and temperature changes, usually error can be controlled to about 0.1 Bar and 2 ℃. External sensors rely on the valve and the air pressure inside the tyre temperatures connected, and affected by external environment, sensing accuracy than the built-in sensors, this is self-evident. So exaggerated, but didn't also imagine its precision can reach about 90% of the built-in sensor.

Service life:

The service life of the sensor was mainly affected by the battery life, on the one hand, as the difference inside and outside the sensor battery, the other is the different work environment, the service life of the built-in sensors usually can be up to 5 to 7 years, and outside is 2 to 3 years. External sensor exposed outside the tire, sun and rain stagnant, unavoidably hashing out again; While the built-in sensors inside the tire by better protection.

Applicable environment:

Because placed on the outside of the tire, protected by the less, so the external sensors are not suitable for use in a harsh environment, such as more rain all the year round the region, rutted dirt road or mountain area, the low temperature region (battery) can be affected. In the example above environment, owner friend had better install the built-in sensor.

Anti-theft performance:

Is like a wallet in the clothes inside pocket like which is more easily stolen in backpacks, do not need to go. But the owner friends don't have to worry too much, according to the current social situation, theft of the tire pressure sensor fashion has not flourished.

Price:

Built-in sensors more expensive than the outer a little bit, this is the whole market.