Working principle of diffused silicon sensor

The working principle of diffusion silicon sensors is based on the piezoresistive effect of silicon materials, which determines the pressure of the measured medium by measuring the strain on the silicon wafer.

Diffuse silicon sensors, as one of the representatives of modern high-precision pressure measurement technology, have the core function of being able to convert changes in external pressure into electrical signals, thereby accurately measuring pressure values. Diffuse silicon sensors, especially pressure sensors, are important members of modern sensor technology, widely used in various fields such as industry, automotive, aviation, and consumer electronics. This type of sensor holds an important position in the field of measurement due to its high precision and reliability.

1、 Structurally speaking

The diffusion silicon sensor mainly consists of two parts: the sensing unit and the signal processing circuit. The sensing unit is usually composed of two silicon wafers, forming a thin and small chamber in the middle, with both sides coated with metal. When external pressure is applied,

The silicon wafer undergoes bending deformation, resulting in a change in resistance value, which is proportional to the magnitude of pressure. The signal processing circuit is responsible for converting this resistance change into an electrical signal for subsequent data processing and analysis.

2、 In terms of working principle

The core of diffused silicon sensors lies in utilizing the piezoresistive effect of silicon materials. Specifically, when external pressure is applied to the sensor, the silicon wafer undergoes slight deformation, which can cause a change in the resistivity of the silicon wafer. By accurately measuring the changes in resistivity, the magnitude of external pressure can be accurately calculated. This process involves complex electronic signal conversion and processing, including signal amplification, filtering, analog-to-digital conversion, and other steps. The final output is a digital signal that can be directly used for monitoring or control systems.

3、 Application Fields and Practical Cases

① Industrial automation: Diffuse silicon pressure sensors are widely used in industrial automation systems, such as pressure monitoring and control in fluid control systems, due to their high response speed and accuracy. ② Aerospace: In the aerospace field, these sensors are used to monitor the pressure status of key components of aircraft, ensuring the safety and reliability of system operation. ③ Medical equipment: In the medical field, diffused silicon pressure sensors are applied in various diagnostic devices, such as blood pressure monitors and ventilators, to provide precise pressure control. 4、 Future Development Trends and Innovation

① Technological innovation: With the development of nanotechnology and microelectromechanical system technology, future diffusion silicon pressure sensors will be more miniaturized and intelligent, providing more functions and higher integration. 2) The application of the Internet of Things: Combining IoT technology, diffusion silicon pressure sensors can achieve remote monitoring and real-time data analysis, providing more effective solutions for emerging fields such as smart cities and smart homes.

Diffuse silicon sensors have become an important component of modern industry and scientific research due to their high precision, high reliability, and wide range of applications. Through continuous technological innovation and application expansion, diffusion silicon sensors will continue to play an important role in improving industrial automation levels and ensuring the safe operation of equipment.