With the official release of the OIMLR51 "Automatic Sorting and Checking Instruments" international recommendation, national standards and national metrological verification procedures for automatic sorting and checking instruments have also been formulated and approved by relevant technical committees, and are expected to be implemented this year. This provides a technical basis for the production and metrology departments of enterprises to carry out type evaluation and verification. The R51 "Automatic Sorting and Checking Instruments" international recommendation includes the following types of scales:
1. Automatic weighing of pre-packaged discrete loads in accordance with the requirements of the OIML R87 international recommendation;
2. Other automatic grading and inspection, such as label scales, price-label scales and postal scales;
3. Weighing bulk loads installed on vehicles specifically designed for a special purpose (vehicle-mounted); for example, garbage scales;
4. Weighing bulk loads (vehicle combinations) that have common components with vehicles (such as levers, connectors, force converters, etc.), such as loader electronic scales.
The first type of weighing instrument belongs to the X type of weighing instrument specified in the R51 international recommendation and verification procedures, and the second type of weighing instrument belongs to the Y type of weighing instrument. However, in some cases, the weighing instrument belongs to both X and Y, which is more common in the inspection weighing instrument with a conveyor belt structure. With the increasing development of modern engineering machinery towards intelligence and mechatronics, the application of the third and fourth types of weighing instruments mentioned above has become more and more extensive in recent years. While widely applying new technologies, new structures and new products are constantly emerging. After improving the reliability of the whole machine, the focus of technological development has shifted to increasing the electronic information technology content and intelligence of the product. We call the third and fourth types of engineering machinery or vehicles that integrate weighing technology vehicle-mounted weighing instruments or vehicle-combined weighing instruments. Vehicle-mounted weighing instruments and vehicle-combined weighing instruments are more and more widely used in railway freight yards, automobiles, ports, docks, garbage disposal industries, etc. because of their flexibility, convenience, fast loading and unloading speed, and good safety and accuracy.
The garbage scales in vehicle-mounted scales and vehicle combination scales are specially designed for loading and unloading garbage and weighing. As early as 1993, Germany had already begun to formulate regulations on garbage disposal fees and developed garbage scales. The garbage disposal industry will also develop rapidly in my country. Including it in the regulations this time is very necessary to promote and promote the development of this industry. At present, the Beijing Municipal Urban Appearance Management Committee is studying the measurement standards and methods for garbage disposal fees. In 2010, my country will legislate on domestic garbage. Garbage legislation will involve the issue of garbage disposal measurement and charging. The measuring instruments for solving garbage measurement will definitely be closely related to vehicle-mounted scales or vehicle combination scales. Vehicle-mounted scales generally install the weighing system on the vehicle, such as the electronic scale with a truck crane, which is mainly used to weigh tank-type garbage cans.