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Briefly describe the working principle
发布者：Yayu'an Industrial Products (Suzhou) Co., Ltd. 发布时间：2020-1-16 10:07:57 点击次数：400 关闭
One of the important accessories of the printer is the pressure sensor, which is the most commonly used sensor in industrial practice. The printer is no exception. The pressure sensor we usually use is mainly manufactured by using the piezoelectric effect. The sensor is also called a piezoelectric sensor.
     The main piezoelectric materials used in piezo sensors for printer accessories include quartz, potassium sodium tartrate, and dihydrogen phosphate. Among them, quartz (silicon dioxide) is a natural crystal, and the piezoelectric effect is found in this crystal. Within a certain temperature range, piezoelectric properties always exist, but after the temperature exceeds this range, the piezoelectric properties are completely Disappear (this high temperature is called the "Curie point"). Because the electric field changes slightly with the change of stress (that is, the piezoelectric coefficient is relatively low), quartz is gradually replaced by other piezoelectric crystals. Potassium sodium tartrate has a large piezoelectric sensitivity and piezoelectric coefficient, but it can only be applied in environments where the room temperature and humidity are relatively low. Dihydrogen phosphate is an artificial crystal that can withstand high temperatures and relatively high humidity, so it has been widely used. Piezoelectric effect is the main working principle of piezoelectric sensors. Piezoelectric sensors cannot be used for static measurement, because the charge after external force is only saved when the loop has infinite input impedance. The actual situation is not the case, so this determines that the piezoelectric sensor of the printer accessory can only measure dynamic stress.
     The pressure sensor of the printer can be said to be a relatively technical product, so it is also a troublesome thing for many times to damage. The above points are some introductions to piezoelectric sensors. It is certain that a good piezoelectric sensor can make the printer work better.