Sensor "Bottleneck" and a Design of Low-Cost Pressure Sensor

As the brains of the Industrial Automation Systems, the computer chips are very mature and cheaper. But the price of sensors are higher or very higher than the computer chips, make the "bottleneck" of using the automatic control technology in the low cost equipment.. we should pay attention to this matter and its development. This paper introduce a low-cost pressure sensor design approach: combined with ordinary Bourdon tube pressure gauge, Gray code disk, optical reading and digital filter technology, to design a pressure sensor, and embedded the sensor to the microcontroller system of the equipment controlling, the cost is low and it can complete the sensing task.