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The working principle of the printer pressure sensor

by:Leadtech Coding     2021-08-18

One of the important parts of the inkjet printer is the pressure sensor. It is the most commonly used sensor in industrial practice. The cij printer is no exception. The pressure sensor we usually use is mainly made of piezoelectric effect. Yes, such sensors are also called piezoelectric sensors. The piezoelectric materials mainly used in the piezoelectric sensor of the inkjet printer include quartz, potassium sodium tartrate and dihydrogen phosphate. Among them, quartz (silica) is a natural crystal. The piezoelectric effect is found in this crystal. Within a certain temperature range, the piezoelectric properties always exist, but after the temperature exceeds this range, the piezoelectric properties are completely Disappear (this high temperature is the so-called '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 great piezoelectric sensitivity and piezoelectric coefficient, but it can only be used in environments where 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. The piezoelectric effect is the main working principle of the piezoelectric sensor. The piezoelectric sensor cannot be used for static measurement, because the electric charge after the action of the external force is saved only when the circuit has an infinite input impedance. The actual situation is not like this, so this determines that the piezoelectric sensor of the printer accessory can only measure dynamic stress. The pressure sensor of the inkjet printer can be said to be a relatively technical product, so it is more troublesome for damage in many cases. The above points are some introductions to piezoelectric sensors. What is certain is that a good piezoelectric sensor can make the cij printer work better.

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