Crane scale is a special measuring equipment developed for the special requirements of loading and unloading operations such as ladle, hot metal ladle and grab bucket in metallurgy and foundry. It is mainly used for weighing of process or inter-factory settlement, and the accuracy is usually ±0.2~0.5%(full scale). According to the structure type, it is divided into two categories: roller type and track type. The two Weighing modules and installation forms are different, but they are equipped with special instruments for crane scales. The roller crane scale is mainly composed of a pair of fishback weighing sensors and weighing instruments. The fishback weighing module is mounted on the trolley under the fixed pulley shaft or weighing shaft, each shaft is equipped with 2 weighing sensors. The sensor measures the tension of the wire rope on the pulley, and the weighing meter can convert the weight of the load being lifted. Rail crane scales usually consist of four rail weight sensors and weighing instruments. Four sections of track are cut off under the four wheels of the car, and a weighing sensor is installed at the cut space. The height and width of the sensor and track are the same. The trolley is driven to the sensor, and the scale body can measure the weight of the heavy object being lifted. The crane Electronic scale is mainly composed of weighing sensor, weighing body structure, junction box, instrument and so on. The signal of the load cell is transmitted to the load cell in the driver's cab through a junction box and a double-shielded signal cable. In addition to the conventional functions of zero clearing, peeling, accumulation, printing, data call, etc., the weighing instrument has more powerful functions to adapt to the characteristics of crane lifting operations. At the same time, the instrument can also be connected to the large screen to achieve the large screen display of weight data.

Crane positioning measurement is a set of automatic detection system for the data acquisition of crane scales. According to the process flow, the operation process of the crane is automatically tracked and intelligent analyzed, so as to realize the automatic data statistics of the crane scale. Instead of the heavy work of scribes and human negligence caused by report data inaccurate, false report, missing report phenomenon. One computer can accept the signals of multiple cranes at the same time, and realize the automatic measurement of the whole system.

When the crane positioning device reaches a specific location, the crane automatic metering system identifies the location through the location identifier. The control unit will receive the weight signal and position signal package through the radio to the computer control part. The control unit accepts the command sent by the computer and executes the corresponding action, while sending an alarm when the value exceeds the set range. Location Identification Part This part consists of location identification distributed at specific locations on the site or on the truck. The location identifier is used by the positioning device on the vehicle to identify the location. Computer control Part of the computer receives the information from the radio station in the sky, and automatically determines which operation is carried out through the set program, and automatically records the relevant weight. The computer control part can also send zero, peel, reset and other commands to the crane.