Human society has entered the information age, people's social activities rely mainly on the development and acquisition, transmission and processing of information resources. Electronic truck scale sensor at the interface position of research object and detection system, the detection and control system of the first. Therefore, sensor becomes the perception, acquire and detect information window, all the research and scientific production process automation to obtain information, must be through the sensor gain and transform for easy transmission and processing electrical signals through it. So the role and position of sensor is important.

If the computer metaphor for the human brain, so the sensor can be compared to the human sensory organ. Can imagine, no function in normal and perfect sense organs, not promptly and accurately acquisition and conversion to the outside information, even if have again good brain does not play its due role. Science and technology is developed, the higher degree of automation, the greater the dependence of sensor. So, in twentieth Century 80 years, the world will sensor technology as focus on the development of high technology, the importance of.