In the process of using the cable displacement sensor, the fault is inevitable, the main factor is the linear error caused by the sensor circuit design, the mechanical error in the installation process and the interference of external environmental factors on the sensor detection data will also affect the accuracy of the control system to collect data.
The reasons for the failure of the rope displacement sensor in use:
1, the user installation is not correct, many companies in the product factory has a mounting bracket, accompanied by the use of installation instructions, when the installation deviation is too large, resulting in precision error, in order to reduce the error and sensor life, the rope displacement sensor in the installation and use process, should pay attention to the running direction of the rope and the direction of the line, if the sensor range is large and horizontal installation, The problem caused by the weight of the rope should be considered.
2, measuring the length of the stroke determines the accuracy of the test, some users use 10 meters or even 20 meters of the rope displacement sensor, the accuracy is also very high, but for the rope, the distance of 10 meters is relatively large, because the long distance will have many factors affect the accuracy, such as the vertical use distance of the rope is 10 meters, there will be external force caused by the swing of the rope. Therefore, in the selection of products, there are many factors that affect the accuracy, such as the vertical use of the rope pulling distance is 10 meters, there will be external force on the rope swing, therefore, choose the product, must consider the application of the occasion.
3, the error caused by the control of the upper computer, such as the length of the encoder output signal line, or the output line generated by the extension of the signal line without the permission of the sensor manufacturer, will lead to the failure of the shield, causing external interference to the encoder, thereby increasing the accuracy error.
4, the accuracy error caused by internal reasons of the cable sensor, because the cable sensor uses sliding resistance and drive module, resulting in long-term use of the accuracy deviation, so it needs to be calibrated once a year.
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