An Introduction To The Magnetic Sensor

Published:2010/9/26 0:51:00 Author:Li xiao na From:SeekIC

The sensitive element magnetic performance, which is caused by the magnet field, current, temperature and light, is changed to the electrical signal by the magnetic sensor. This method can detect the objects. The sensor does not touch anything when it is doing the measurement, so the signal can not be influenced. This device is pollution and noise resistance, which is able to handle the tasks under the hostile environment. Therefore, this device is widely used from the national defence to the economic depart, from the medical care to the other part of the daily life.

The magnetic sensor is always used inside the machine; therefore, it is developing towards the portability, multifunction and intelligence. People demand the sensor to be sensitive and to give quick response when there is any change of the physical quantity in the small space. Namely, the magnetic sensor should not only small, but also have high efficiency.

New technologies and materials, like the manufacturing technique of the large scale semiconductor integrated circuit, MEMS, magnetic thin film and multiplayer, are developing, which had built the basis for the portability of the magnetic sensor. Many multifunctional sensors are released on the market constantly, such as the GMI and SI. The development and application of the new sensor has created great social benefits and sped up the realization of office automation and management concentration. It also plays important roles in many different industries, such as the environmental protection, biotechnology and the resource detection.

There will be great demand for the magnetic sensor from the automotive and industrial area. It is predicated that its sales will reach 1.4billion in the year of 2013. Experts point out that the magnetic sensor is an ordinary sensor, but it is applied from the industrial motor to the electronic products. The magnetic sensor has become the strong competitor of the potentiometer and microswitch now. The related integrated circuit is LM324.

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