Current situation and development trend of weighing instrument knowledge electronic weighing technology

1 Small size, low height and light weight, i.e small, thin and light In recent years, the newly developed electronic platform scale structure fully reflects the development direction of small, thin and light For the low capacity electronic platform scale and electronic axle scale, the thin or ultra-thin circular load cell can be directly embedded in the blind hole with the same outer diameter of the load cell on the bottom of the steel plate or aluminum plate to form a low profile scale structure The number and position of the load cell are determined by the rated load and mechanical requirements of the scale The steel plate or aluminum plate is the platform of the scale body The load cell is not only the sensing element, but also the bearing fulcrum, which greatly reduces the structure of the scale body, reduces the movable connection link, reduces the cost, and improves the stability and reliability For the electronic platform scale and electronic ground scale with medium or large capacity, there have been thin-walled steel sections with square or rectangular closed sections, which are welded into a whole bamboo structure in parallel rows Four load cells are respectively installed in the notches at both ends of two thin-walled steel sections outside Zui, and the fixed support installed on the load bearing point of the load cell is the support of the scale body The force fulcrum not only reduces the load-carrying mechanism, but also saves the height of the scale body, which is a very promising scale structure For the large scale electronic platform scale, the finite element method can be used to calculate the equal strength and rigidity, and the profiles with large bending rigidity and the light corrugated sandwich steel plate can be used 2 Modularization for large or super large load-carrying structure, such as large static and dynamic electronic truck scale, has begun to use several length of standard structure modules, after the combination of the split body, resulting in new varieties and specifications of the split body structure It not only improves the universality, interchangeability and reliability of products, but also greatly improves the production efficiency and product quality At the same time, it also reduces the cost and enhances the market competitiveness of enterprises 3 Integration for some kinds and structures of electronic scales, such as small electronic platform scale, special scale, portable static and dynamic electronic axle scale, static and dynamic electronic track scale, etc., can realize the integration of scale body and load cell, rail and load cell, track scale body and railway line For example, the portable static and dynamic electronic axle scale integrated with the scale body and load cell is made of hard aluminum alloy thick plate Its structure principle is that the aluminum alloy plate strengthened by solution heat treatment, or four cantilever load cells are formed by drilling and milling slots on four corners respectively, or a plurality of symmetrical blind holes and slots are milled on the bottom surface of the aluminum alloy plate to form an integral shear beam load cell This makes the scale body and the load cell into one, that is, the aluminum alloy plate is not only the platform of the scale body but also a large plate type load cell For example, a 10t portable dynamic electronic axle scale with the later structure has a dimension of 720mm × 550mm × 32mm and a weight of about 23kg 4 The weighing display controller of the intelligent electronic weighing instrument is combined with the electronic computer, and the function of the weighing display controller is increased by the intelligence of the electronic computer On the basis of the original functions, the electronic weighing apparatus can be added with the functions of reasoning, judgment, self diagnosis, self adaption and self-organization, which is the fundamental difference between the electronic weighing apparatus using the microcomputer weighing display controller and the electronic weighing apparatus using the intelligent weighing display controller in the market today 5 The development law of the comprehensive electronic weighing technology is to continuously strengthen the basic research and expand the application, expand the new technology field, penetrate into the adjacent disciplines and industries, and integrate various technologies to solve the problems of weighing measurement, automatic control, information processing, etc For example, in the field of flow measurement, if a set of standard large flow measurement system is built according to the traditional theory and method, the price is quite expensive If we use the weighing method, that is mass flow method, as long as the weight and time are measured accurately, the problem of large flow measurement will be solved For some commercial electronic pricing scales, it is not enough to only have the functions of weighing, pricing, displaying and printing The modern commercial system also requires it to provide various sales information, closely integrate weighing and management automation, integrate weighing, pricing, warehousing and sales management, and realize management automation This requires that the electronic pricing scale can be connected with the electronic computer, and the weighing system and the computer system constitute a complete integrated control system 6 Combination In the process of industrial weighing and measuring or technological process, many weighing and measuring systems also need to be combinable, that is, the measuring range can be set arbitrarily; the hardware can make some adjustments according to certain working conditions and environment, and the hardware function will develop towards the software direction; the software can be modified and expanded according to certain procedures; different input and output data and instructions can be used Language and barcode, and can communicate with external control and data processing equipment Thirdly, the electronic weighing apparatus of our country should enter the international market Participate in international competition It is necessary to implement the international recommendations formulated by the international organization of legal metrology, and to have international level technology and equipment, and international level quality This requires enterprises to take technology as the guide, quality as the center and management as the basis, strive to improve the level of manufacturing technology and manufacturing process, and stabilize product quality Enhance the competitiveness of the international market