In industrial production, load cells are widely used to measure the weight of objects. However, the accuracy of a load cell is an important factor in evaluating its performance. Accuracy refers to the difference between the sensor output value and the value to be measured, and is based on factors such as sensor reliability and stability. Therefore, this article will discuss the accuracy of the load cell and its application.
What is the accuracy of the load cell？
The accuracy of a sensor refers to the difference between its output signal and the value to be measured, usually expressed as a percentage, called the accuracy indication error (indication error). Precision indication error is divided into quantitative, percentage and digital indication error. In the load cell, the quantitative error (direct or direct error) refers to the error caused by factors such as hardware structure, material parameters, manufacturing process, etc.; the percentage error (or relative error) refers to the error of the ratio between the sensor output and the real value ;Digital error refers to the precision error produced by digital calculation (such as AD converter).
Factors Influencing the Accuracy of Load Cells
Mechanical misalignment: During sensor over-operation, mechanical misalignment is a common cause of loss of sensor accuracy. The causes of mechanical imbalance include physical deformation, structural corrosion, non-standard installation, etc.
Signal Processing Errors: Signal noise levels that are too high or too low can affect the output of the sensor. The causes of such errors include too small design scale, signal processing circuit loss or poor quality, etc.
Environmental factors: Load cells are used in different environmental conditions, and different environmental conditions will affect the performance of the load cell. Such as temperature changes, working life, use environment, etc.
Improvement of Load Cell Accuracy
Select the appropriate sensor: First of all, you should select the appropriate load cell model according to the actual application scenario to obtain more accurate weight measurement results.
Carefully select the application environment: When installing and applying the load cell, attention should be paid to the influence of various environmental factors such as ambient temperature and mechanical wear on the accuracy of the load cell. Some norms and reasonable use range should be followed, such as avoiding too high or too low temperature environment.
Instrument Calibration: Proper calibration can effectively improve the accuracy of the load cell. Calibration ensures the sensor’s response characteristics, sensitivity and stability. Laboratory calibration is to provide accurate measurement results of load cell accuracy and improve the reliability of load cell calibration.
In Conclusion
The accuracy of the load cell is an important parameter to measure the accuracy of its device. A series of measures such as enhancing the stability of the instrument, reducing equipment vibration, and improving environmental conditions can improve the accuracy of the load cell. Operations such as calibration can also ensure that the load cell can continue to work accurately.
Post time: Jul-17-2023
