What are the ways to solve the sensor drift? Sensors are commonly used detection devices and are widely used in many industries. As long as there are drifting electronic components, the sensor is no exception. There are two kinds of zero drift and temperature drift in sensor drift. These two kinds of drift have a great influence on the measurement accuracy of the sensor. How can we solve these problems? The following Xiao Bian will introduce to you in detail how to solve the problem of sensor drift. Motor Power Unit,Dc Contactor,Electric Hydraulic Pump,Dc Motor Huai'an Aide Hydraulic Machinery Co.Ltd , https://www.aidehydraulic.com
There are many reasons for the sensor zero drift. For pressure sensors, the parameters of the components in the bridge itself are asymmetrical; the temperature coefficient of the sensitive grid material of the elastic component and the resistance strain gauge, the linear expansion coefficient is different, and the combined length of the bridge leads is inconsistent, resulting in the sensor constituting the bridge. There is a certain difference in the overall temperature coefficient of the adjacent adjacent arm. When the temperature changes, the resistance variation of the adjacent arm is different, so that the output of the bridge is unbalanced, that is, there is a zero drift; for the smart sensor, time drift—that is, the system In terms of time, as the time increases, it is equivalent to aging the system. In this way, the structural characteristics of the system will change, resulting in drift. Temperature drift - zero point instability due to temperature effects. It can be seen that the influence of temperature is the most important factor that causes zero drift and is also the most difficult to control. There are generally two methods to solve the temperature drift, hardware and software. For pressure sensors, the hardware methods include serial and parallel proper constant resistance method on the bridge arm, bridge arm thermistor compensation method, external bridge series, shunt thermistor compensation method, double bridge compensation technology, triode compensation technology, etc. . The software method is to eliminate the offset through the software program. This method is very practical for the digital output sensor. The customer can use software to write it, or the sensor can display the meter by adjusting the digital display. It is very convenient.
In the highly developed form of modern science and technology, the accuracy of the measurement is required to be higher and higher. Therefore, it is particularly important to reduce or eliminate the sensor error caused by the temperature. When customers find that the sensor is drifting, they need to contact the manufacturer to request the sensor to provide a solution to the drift.