The weighing platform is composed of a weighing sensor, a weighing platform, a display control unit, and a data acquisition and processing system, etc. The weighing sensor generates resistance changes due to force, thereby achieving weight measurement. The weighing platform uses high-stiffness materials to effectively reduce vibration and displacement during the measurement process, thereby improving measurement accuracy. A multi-sensor redundant design is adopted to ensure that measurement accuracy is maintained even in the event of sensor failure. The data acquisition and processing system realizes real-time acquisition, transmission, and processing of weighing data, thereby enhancing the intelligence level of the weighing platform.

After being subjected to the force of the elastic body of the weighing sensor, the electronic weighing platform generates a main stress at a 45° angle perpendicular to the center axis of the I-beam, which is caused by shear stress and results in tensile stress and compressive stress. Four strain gauges are respectively attached to the two sides of the web of the I-beam and at positions perpendicular to the center axis at a 45° angle. These four strain gauges form a full bridge. When the sensor of the weighing platform is subjected to a load, the resistance value of the strain gauges decreases, and the result generates an unbalanced output proportional to the load on the diagonal of the bridge. The output signal is not affected by the change in the position of the force measurement point. When an elastic strain beam is subjected to a load, the weighing platform undergoes sensor bending, and the normal stress is proportional to the bending moment of the beam, and the bending moment is proportional to the distance of the force application point. Using a shear beam type weighing sensor is because it measures its shear strain, and shear strain is proportional to shear force, and shear force is a constant on the beam and independent of the bending moment, and the position of the force application point does not affect the output of the sensor.

The Electronic scale includes a bearing plate and a foundation. One side of the bearing plate is equipped with a hydraulic extension rod, and one side of the hydraulic extension rod is equipped with an extrusion plate. The lower end of the bearing plate is equipped with a pressure sensor, and the lower end of the pressure sensor is equipped with an installation plate. The upper end of the foundation is equipped with a support column, and the upper end of the support column is equipped with a trapezoidal piece. The upper end of the trapezoidal piece is equipped with a buffer plate, and the upper end of the buffer plate is equipped with a sleeve. By setting the hydraulic extension rods, the two ends of the bearing plate extend outward by the same distance. The hydraulic extension rods drive the extrusion plate to contact the slope. When the truck starts to move onto the bearing plate, the rotation of the wheels does not cause the bearing plate to move in the opposite direction of the truck's movement, avoiding the contact of one end of the bearing plate with one side of the slope. Then the hydraulic extension rods retract, ensuring the accuracy of the weighing.

The control of hydraulic rod electronic scales is usually used for batch mixing of two or more raw materials in proportion, and the batch mixing is controlled in a continuous manner by program control, thereby achieving uniformity in the mixing ratio. Corresponding ratio parameters are input through the human-machine interface, and the signals of each weighing scale are transmitted to the weighing instrument through the weighing sensor, and then the signals are converted and connected to the central controller through the weighing instrument. The central controller combines the set formula and the real-time data of each weighing to control the feeding time and amount of each material. The electronic scale mainly completes the data acquisition and output control of the analog and digital quantities related to the on-site equipment, and the touch screen is used in conjunction with the PLC of the metering tank, making the application of the weighing platform PLC more flexible. The touch screen can set parameters, display data, and depict the production process in the form of animations, making the application of PLC visualized. The Weighing system uses the RS232 interface to connect the touch screen and the PLC through the communication cable. The remote touch screen (HMIA) and the local touch screen (HMIB) are connected through Ethernet, both of which can display the instrument data and equipment status, and can control the on-site equipment.