What is the reason for the error of the force sensor when measuring the object?

The force sensor is actually a device that converts the quality signal into a measurable electrical signal output. When using the sensor, we must first consider the actual working environment where the sensor is located. This is very important for the correct selection of load cells. It is related to the normal operation of the sensor, its safety and service life, and even the reliability and safety of the entire weighing instrument.

Force sensors are widely used in our industry. Therefore, we must have a certain understanding of the use of force sensors so that we can quickly solve problems encountered in work and improve work efficiency. The following will introduce you to the causes and solutions of the errors caused by the pressure sensor to the measured object.

After the load cell is subjected to an external force, the strain gauge mounted on the elastic body deforms and causes a change in resistance. The resistance change causes the Wheatstone bridge to lose its balance and output an electrical signal that is linearly proportional to the external force. It's relatively simple to say, but it is a very complicated work process. Especially when there is an error facing the object to be measured, the load cell will try its best to find a solution. ,

The frequency response characteristic of the load cell determines the frequency range to be measured, and the measurement conditions must be kept within the allowable frequency range. In fact, the response of the sensor always has a fixed delay, and it is desirable that the delay time be as short as possible. The frequency response of the sensor is high, the signal frequency range that can be measured is wide, and due to the influence of structural characteristics, the inertia of the mechanical system is relatively large, and the frequency of the measurable signal is due to the low-frequency sensor. In dynamic measurement, the response characteristics should be based on the characteristics of the signal (steady state, transient, random, etc.) to avoid over-fire errors.

The linear range of the load cell refers to the range in which the output is proportional to the input. Theoretically, the sensitivity remains constant within this range. The wider the linear range of the sensor, the larger the measurement range, and a certain measurement accuracy can be guaranteed. When selecting a sensor, after determining the sensor type, you first need to check whether its range meets the requirements. But in fact, no sensor can guarantee absolute linearity, and its linearity is also relative. When the required measurement accuracy is low within a certain range, it can be considered that the sensor with less nonlinear error is linear, which will bring great convenience to the measurement.