Understand the characteristics of piezoresistive pressure sensors

The piezoresistive pressure sensor uses integrated circuit technology to manufacture four thin film resistors of equal value on the silicon chip and form a bridge circuit. When no force is applied, the bridge is in a balanced state and no voltage output; when under pressure When working, the bridge loses balance and outputs voltage, and the output voltage is proportional to the pressure. The piezoresistive pressure sensor has the following characteristics: ①The piezoresistive piezoresistive pressure sensor adopts integrated circuit technology to produce four thin film resistors of equal value on the silicon chip and form a bridge circuit. When it is not subjected to force , The bridge is in a balanced state, no voltage output; when under pressure, the bridge loses balance and outputs voltage, and the output voltage is proportional to the pressure.　　 Piezoresistive pressure sensor has the following characteristics: 　　①The sensitivity coefficient of piezoresistive pressure sensor is 50-100 times larger than that of metal strain pressure sensor. Sometimes the output of a piezoresistive pressure sensor can be measured directly without an amplifier.　　②Because it is processed by integrated circuit technology, the structure is small in size and light in weight.　　③High pressure resolution, it can detect micro pressure as small as blood pressure.　　④Good frequency response, it can measure pulsating pressure of tens of kilohertz.　　⑤Because the force-sensitive element and detection element of the sensor are made on the same silicon chip, it works reliably, has high comprehensive accuracy and has a long service life.　　⑥Because of the use of semiconductor material silicon, the sensor is more sensitive to temperature. If temperature compensation is not used, the temperature error will be relatively large. If you have any questions, please call the customer service hotline: 0517-86987700 Log in to the company website: www.51gk.com www.ehuahai.com