Classification and Selection of Weighing Module Systems

weighing system Modules are usually divided into two categories: static load modules and dynamic load modules. The static load module is mainly suitable for static load weighing occasions with small lateral forces. The static load weighing module can be conveniently installed on various shapes of containers. The dynamic load module is mainly suitable for mechanical devices that bear horizontal forces, such as assembly lines, conveyor belts, etc. In addition, the dynamic load module can also be used for the transformation of mechanical platform scales. The type of module depends on the different feeding methods. When materials are fed vertically into buckets, tanks, kettles, and tanks using conveyors or pumps, static load modules should be selected; When materials are transported horizontally to the weighing platform or container, a horizontal impact force is generated. At this time, a dynamic load module should be selected, such as a roller scale, car scale, or track scale. When changing mechanical scales to electronic scales, a dynamic load module should be selected.
Modules are divided into stainless steel and carbon steel materials based on their materials. When selecting a weighing module, consideration should be given to its environment and the properties of the materials contained in the container. If the weighing module is exposed to moisture or corrosive substances for a long time, it is recommended to choose an all stainless steel module. The selection of module quantity can be determined based on the number of support feet for tanks with installed support feet. If it is a newly installed container, and if it is a vertically placed cylindrical container, using three point supports is more stable; Considering the effects of wind, shaking, vibration, etc., it is advisable to use four point support; A container placed horizontally should be supported at four points. In a system with multiple modules, the total load should be applied equally to each module as much as possible.
The selection of weighing module capacity requires three main factors to be considered when estimating the capacity of a weighing module for a tank scale: the mass of the empty tank, i.e. the mass of the scale body when empty, the maximum load that may be loaded into the tank, ms, and the number of weighing modules n. Secondly, due to uneven load distribution and insufficient estimation of loads, a standard safety factor should be consideredf (f = 1.5) ;Additionally, due to environmental factors such as wind, shock, vibration, etc., a second additional safety factor k often needs to be considered. The capacity selection of a single weighing module should meet the following relationship:
Weighing module capacity m& Ge; 1.5 k (mo+ms)/n
With the increasing demand for product quality in chemical enterprises and the more precise proportion of production raw materials, weighing systems have been widely applied and promoted. The weighing system can be used for material measurement monitoring, such as the measurement of hoppers, material tanks, material tanks, etc. (replacing level meters, flow meters, etc.); It can also be used for batching in process production processes, such as controlling the batching system of reaction kettles and tanks, as well as for quality testing and sorting. The weighing system module integrates high-precision shear beam weighing sensors, load transfer devices, and installation connecting plates, ensuring the high accuracy and long-term stability of the shear beam sensors, as well as solving the problem of weighing errors caused by improper installation. stayLoad CellWhen the elastic body is subjected to a force from the direction of force, it undergoes a corresponding slight deformation. At this time, the resistance of each bridge circuit of the resistance strain gauge pasted on the elastic body undergoes corresponding resistance changes. According to the working principle of the bridge, if a constant excitation working voltage is applied to both ends of the resistance strain gauge, the voltage difference between the two output terminals of the bridge can reflect the deformation degree of the corresponding resistance strain gauge. From this, a constant excitation voltage is applied to the weighing sensor, and the magnitude of the force can be determined by detecting the difference in its output voltage. In order to ensure the measurement accuracy of the weighing sensor in various environments, linear compensation, zero compensation, temperature compensation, and anti-corrosion treatment of the sensor surface are generally added to the strain gauge bridge of the weighing sensor. At the same time, to ensure thatLoad CellThe accuracy of remote excitation is generally achieved by outputting two wires at the excitation ends of the strain gauge to the weight transmitter or weighing terminal, used to calculate the loss compensation of excitation voltage during long-distance transmission.