The quality of the rope-drawn displacement encoder controller determines the actual effect
. There are many types of rope-type displacement encoders, which are widely used in displacement measurement and position positioning of automation equipment. They can also be used for size, height, liquid level, deformation, speed, Vibration measurement, or online monitoring of geological and engineering projects. The selection of displacement encoders is limited by product performance, size and environmental factors.
The characteristics of the cable-drawn displacement encoder controller immediately determine the actual effect of the machine and equipment. Application means that the displacement sensor is used in the hydraulic servo control system. According to the built-in or external displacement sensor, the piston rod of the hydraulic cylinder can be inspected in real time, and it will be converted into a proportional electronic signal and feedback to the automatic control. The system, after system software adjustment and calculation, is transmitted to the machine equipment controller and electric actuator for feedback control actual operation.
Rope-type displacement encoders have incremental and absolute types. The incremental displacement encoder converts the displacement into a periodic electric signal, and then converts the electric signal into a counting pulse, and the number of pulses is used to indicate the magnitude of the displacement. The judgment of the encoder direction and the increase or decrease of the number of pulses are realized by an external direction judgment circuit and a counter. If the power is off, the corresponding relationship between the sensor input signal and the output signal will disappear at the same time, and the corresponding relationship between the sensor input and output needs to be restored after power-on. Customers often solve this problem through the power-off hold function of the PLC acquisition system. The anti-interference performance of the incremental displacement sensor is relatively poor. If the pulse is lost, the count will be inaccurate and the accumulated deviation will be caused. The output signal of the absolute displacement encoder corresponds to its mechanical position, and the displayed value is only related to the start and end positions of the measurement, and has nothing to do with the measurement process. Therefore, the absolute value displacement sensor is not affected by power failure, and there is no need to set a reference point. It has strong anti-interference characteristics and data reliability, and is more widely used in the automation industry.