【How to move correctly in industrial automation and process control】 In the field of industrial automation and process control, object detection is a key measurement task, widely used in monitoring parameters such as liquid level and material level. If there is a measurement error, this phenomenon is called "migration".而“正确偏移”是指在一定条件下，测量值向预期方向偏离，需要进行调整才能恢复测量精度。

表格清楚地显示了关键信息。

一、正位移的定义

正位移是指在物体检测过程中，由于外界条件（如温度、压力、介质密度变化）或安装方式的改变，导致测量值偏离真实值，方向发生偏离。 A phenomenon consistent with the expected design. For example, in a differential pressure gauge, if the transmitter installation position is lower than the minimum liquid level, there may be a positive migration phenomenon, that is, the signal output increases as the liquid level rises, but it needs to be compensated according to the actual installation position. 2. Common causes of positive migration Cause, type, specific performance, installation position deviation of the transmitter, installation position is lower or higher than the design position, the density of the medium changes, the density of the liquid or material changes, the impact of pressure measurement on the environmental temperature fluctuation, the temperature change causes the sensor performance to drift, the medium phase changes, if the liquid evaporates or condenses, causing the material change

Changing the installation method, rearranging the position sensor, making it conform to the installation standards, replacing the high-precision sensor, anti-interference capability, high stability, measuring equipment, real-time monitoring and feedback, using PLC or DCS system, real-time data monitoring, timely detection and correction of deviations.

四、Summary

Correct migration is a problem that cannot be ignored in object position detection, especially in non-contact measurement such as differential pressure, 雷达式, etc. Correctly identifying the cause of the correct migration and taking appropriate adjustment measures is the key to ensure the accuracy of the measurement. By rationally selecting the sensor, optimizing the installation method, implementing algorithm compensation, the effects caused by the correct migration can be effectively reduced, and the stability and reliability of the overall system can be effectively reduced. Installation location, medium characteristics, environmental factors, etc., solution methods, calibration, compensation, equipment replacement, installation optimization, etc., the goal is to improve measurement accuracy, ensure production safety.