Basic knowledge of weightless scale
Weightlessness scale (also called weightlessness feeder) is a kind of transportation measurement and verification machinery and equipment for solid fibrous raw materials. On the one hand, the weightlessness scale can transport fine raw materials with a particle size of 5 mm or less, and has the advantages of continuous and uniform transportation, adjustability and strong adaptability. Therefore, it is used in decorative building materials, metallurgical industry, power engineering, coal, chemical plants, etc. The solution production line of raw materials in the field has been widely used. Because there are many key components of the weightless scale for production, processing and riveting, there are often some quality problems of the manufactured products. Generally, users do not pay attention to them immediately in the early stage of the application of machinery and equipment, so after the production and operation of machinery and equipment , It is very likely that some of the quality problems of the production of the weightless feeder machinery and equipment will gradually be reflected in the way of common failures of the machinery and equipment. Therefore, it is proposed to control the manufacturing quality of the weightless feeder in the whole process of manufacturing and reduce the problems caused by the machinery and equipment in the manufacturing. The load cell is a key component of a weightlessness scale, which converts the force into an electronic signal. The load cell is divided into many types from the basic principle, including resistor strain type, piezomagnetic type, capacitive sensor, etc., but from the comprehensive consideration of accuracy, repeatability, reasonableness, and convenience, the current At this stage, many of the productions are still strain-force sensors with resistors. It often accounts for more than 90% of weightless feeders. Resistor strain sensors have improved their characteristics in recent years. With the development of intelligent industrial production automatic control systems, digital display weightless state feeders have also been developed, designed and used in recent years. Because of its immediate output of data, it further improves the anti-interference in transmission and promotes the extremely convenient communication with the electronic computer. Because the stage of the simulation of the instrument panel becomes larger and the A/D conversion is cancelled, the instrument panel greatly simplifies the display and manipulation of the information in the electronic computer, eliminating the need for a weighing display. At this stage, there are roughly two types of such sensors: resistor strain force data weightless state feeder and new digital display weightless state feeder.