Analysis of common errors of load cells of weighing equipment
Analysis of common errors of load cells of weighing equipment Weighing equipment is widely used in automated production lines in major manufacturing industries, which can quickly and accurately detect and reject unqualified products, including overweight, underweight, missing parts, etc. Good products, escort the quality of the production line. The core component of the weighing equipment, the load cell, is an important component that affects the accuracy. Errors will inevitably occur in the process of use. What types of errors will the load cell have? The following Xiaobian from Zhongshan Kenwei will introduce five common errors. No. YI, characteristic errors are caused by the weighing equipment itself, including the DC drift value, the incorrectness of the slope, or the nonlinearity of the slope. After all, there will be a gap between the ideal transfer function characteristics of the device and the real characteristics. Second, the application error of the load cell is the error caused by the operation, including the wrong placement of the probe, the incorrect insulation between the probe and the measurement site, the error in the purification process of air or other gas, and the wrong placement of the transmitter. Errors caused by various operating errors. Third, the dynamic error The sensor that is suitable for static conditions will have strong damping, so it will respond slowly to changes in input parameters, and it may even take several seconds to respond to step changes in temperature. Some load cells with delay characteristics can generate dynamic errors when responding to rapid changes. Response time, amplitude distortion, and phase distortion all contribute to dynamic errors. Fourth, the insertion error is the error caused by changing the measurement parameters when a sensor is inserted into the system. Insertion errors can be caused by using a transmitter that is too large for the system, the dynamics of the system being too sluggish, and the self-heating loading of the system with too much thermal energy. Fifth, environmental errors The use of load cells will also be affected by the environment such as temperature, swing, vibration, altitude, and volatilization of chemical substances. These factors can easily lead to environmental errors.