With the advancement of technology, electronic weighing systems with load cells as the core have been widely used in all walks of life, realizing fast and accurate weighing of equipment materials, especially with the appearance of microprocessors, industrial With the continuous improvement of the automation of the production process, the weighing system in the sensor has become a necessary device in the process control, from the measurement of the weight of large tanks and hoppers that could not be weighed before to the batching system of mixing and distributing a variety of raw materials, Weighing systems are used in the automatic detection and control of powder and granular materials in the production process. At present, the weighing system is used in almost all weighing fields.
According to the force characteristics of load cells in practical applications, load cells are divided into two types, static load weighing module and dynamic load weighing module. The static load weighing module is suitable for occasions where only vertical force is applied. Such as the weight detection of tanks and storage hoppers. The dynamic load module is suitable for occasions with obvious force. Such as platform, production line, conveyor belt weight detection. The weighing system is a new type of weighing element, which combines the load cell, load transfer device and installation connectors and other components, and can be easily connected to various shapes of mechanical devices, such as raceways and platforms , Standing tank, tank, hopper, etc. The electronic weighing system with weighing module as the core can not only guarantee the high accuracy of weighing, and the characteristics of good long-term stability, but also solve the weighing error caused by improper installation. The system using the weighing module can usually achieve a weighing accuracy better than five ten thousandths in theory.
However, the resistance strain weighing module in the electronic weighing system is based on this principle: the elastic body produces elastic deformation under the action of external force, so that the resistance strain gauge pasted on its surface also deforms. After the resistance strain gauge is deformed, its The resistance value will change, and then the resistance change will be converted into an electric signal by the corresponding measuring circuit, thus completing the process of transforming the external force into an electric signal. It can be seen that resistance strain gauges, elastomers and detection circuits are indispensable parts of resistance strain load cells. Take a typical chemical tank as an example, the weighing module installed at the bottom of the tank transmits the weight signal of the tank to the junction box. Each weighing module signal is connected in parallel in the junction box, and the angle difference can be adjusted according to the load condition of each weighing module, and the combined weight signal is sent to the weight transmitter. The weight transmitter processes the weight signal into the corresponding weight data and outputs it to the control system, so the load cell will be an indispensable component in any weighing field.
