What are the reasons for the vibration of the displacement sensor data?
The displacement sensor is a component that converts physical quantities such as displacement, size, and deformation into electrical signals, and is mainly used for automatic mechanical displacement measurement and position positioning. The measurement and control accuracy of the displacement sensor determines the control accuracy of mechanical equipment. The digital jump of the displacement sensor is mainly caused by the following reasons: mechanical vibration, power voltage fluctuation, electrostatic interference or electromagnetic interference, sensor installation and wiring, and sensor quality problems.
Mechanical vibration can affect the measurement accuracy and service life of the displacement sensor. The higher the vibration frequency and the greater the amplitude, the greater the impact on the sensor. During installation and use, the user can reduce the vibration frequency and amplitude of the equipment through shock absorption. For occasions with severe vibration, non-contact displacement sensors such as LVDT displacement sensors and magnetostrictive displacement sensors can be considered instead of contact displacement sensors such as resistive linear displacement sensors and pull rope displacement sensors.
Industrial power supplies with relatively stable voltage are commonly used for displacement sensors. For potentiometer principle sensors such as resistive linear displacement sensors and pull rope displacement sensors, if the power supply voltage fluctuates greatly, the measurement and control data of the displacement sensor will jump accordingly. For some open-air projects, if it is not convenient to install an industrial power supply, you can consider using a solar battery for power supply, or use a low-power displacement sensor to reduce the sensor's usage time and sampling frequency, and increase the battery life cycle.
Automation application sites usually have complex electrical, magnetic, water, and oil environments, and electrostatic interference and electromagnetic interference are relatively serious, which have the most serious impact on the quality of displacement sensor measurement and control data. The displacement sensor is installed and operated in a standardized manner, and the grounding is done well. The sensor signal line and the equipment power line are routed separately, away from various high-power equipment and high-frequency interference sources, which can reduce the impact of the external environment on the sensor. For special occasions with severe on-site interference, technical means such as software and hardware filtering or electromagnetic isolation can be used to ensure the signal quality of the displacement sensor
The installation of displacement sensors requires specifications, and most sensors have high requirements for neutrality, parallelism, verticality or concentricity. If the installation deviation is large, the measurement error of the sensor can be increased, and in severe cases, it can cause the measurement data to jump. The wiring of the displacement sensor must be correct. If the signal line is wrongly connected to the power supply, the linearity error of the sensor will be large, the control accuracy will be poor, and the displayed data will be severely fluctuated. It is especially easy to damage the sensor.
The quality of the sensor is the basic element that affects the accuracy of measurement and control. The cost of displacement sensors usually does not account for a high proportion in the design of measurement and control systems, but has a great impact. If the quality of the sensor is good, the measurement and control stability of the automation equipment will be high, and the system control accuracy will be good; if the quality of the sensor is not high, it will be difficult to achieve precise control, the risk of shutdown maintenance will increase greatly, and the service life will not be effectively guaranteed.
