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Briefly describe the principle of load cell weighing system

The load cell is composed of a resistance strain gauge and a metal elastic component body connected together to form an integral load cell. Four resistance strain gauges form a bridge. The gravity G of the measured object causes the elastic element to deform ε, which causes the extension of the strain gauge, the compression deformation ε, and the elastic deformation is proportional to the external force: ε∝G according to the resistance strain effect theory: the relative change of the resistance strain gauge ( ΔR)/R is proportional to the deformation ε (ΔR)/R=kε where k is the resistance strain gauge sensitivity coefficient. Therefore, the unbalanced voltage U of the (ΔR)/R∝G Wheatstone bridge can be measured by Um, amplified, transmitted, and processed by the weighing controller to obtain the weight G of the measured object.


The basic principle of the load cell weighing and batching system is that the force sensor manufacturer must first set the amount of each material according to the preparation ratio, and the weighing controller or PLC sequentially executes the feeding of various materials, and weighs through the weighing. The sensor meter detects the amount of the material added until the amount of the material reaches the set value, and closes the feed valve of the material. When the amount of the material is finished, the process of adding the next material is waited until the order of the next material is added. All materials are dosed by the previously set fixed amount until the end of the feed.

Haoyang Sensing System Engineering Co., Ltd. is a professional research base of Limin Sensor. The company has gathered a group of innovative technicians, specializing in load cell, load cell, torque sensor, multi-dimensional force sensor, transmitter. , research and development and manufacturing of intelligent instrumentation.