Recently, the National Institute of Metrology has successfully developed China's first large scale test device automatically load temperature and humidity, and by experts. Loading and unloading of the device through the robot system, without having to remove scales, can be automated temperature and humidity conditions to achieve large scale weighing performance test, the overall technical indicators better than the existing installations abroad, greatly enhanced our ability to scale performance test system .
Price computing scale, glue gun electronic truck scale, railway scale, quantitative packing scale, port scale ... ... a wide variety of scales and the people's production and life are closely related, scales, or on product quality standards to maintain the market economic order and play a very important trade fair effect. Including weighing performance test reproducibility, in addition to skin testing and other tests, including performance evaluation of weighing scales to ensure accurate measurement, the primary means of acceptable quality.
According to the relevant scale test procedures, performance evaluation scale trials, in addition to room temperature tests, glue stick but also temperature and humidity conditions in the performance test. Temperature and humidity conditions for the completion of the test, in the past are based on the modular approach will be bulky to move into large scale open the temperature and humidity chamber, then by the test personnel to analyze the various components were tested. However, during the test using the module method cumbersome, and the test officer to enter temperature and humidity chamber will affect the reliability of test results, test chamber while the highest 40 ℃, the lowest level of -10 ℃ 85% RH humidity moderate environment, but also makes the test it difficult to complete loading and unloading weights and other linear and repeatability tests. Performance evaluation of large scale lack of testing capacity, to China's foreign trade, international mutual recognition of testing and assessment scales have brought serious impact. The Research Institute of Metrology automatically load the large scale temperature and humidity testing equipment to a good solution to this problem.
According to Project Leader mass density of the Chinese Institute of Metrology Research Office, Dr. Wang Jian introduction, the device mainly consists of self-developed robot loading and unloading systems, temperature and humidity chambers and electric truck components. Loading and unloading by the robot system can be completed in 12 minutes time (a hot spot temperature or humidity) 10 return load testing process, testers do not need to enter the temperature and humidity chamber, can achieve a variety of temperature and humidity conditions of the weighing full scale evaluation test, greatly shorten the time for large scale test. Both drivers and electrical components installed in the external temperature and humidity chamber, the effective temperature and humid conditions to avoid long-term stability and reliability of equipment and damage effects.
Compared with the same technology at home and abroad, the device designed by mechanical and electrical integration technologies, new hardware, and special weight group design sophisticated combination of scientific and rational, fully functional software. Currently, the system stable and reliable test device can be 300 to 3,000 kg of large, special, and special weighing device provides a dedicated testing environment temperature and humidity weighing performance test reproducibility, in addition to skin testing and other types of evaluation tests, measuring the relative uncertainty better than 5 × 10-6.
Large Scale Test Apparatus for automatic loading to improve detection capabilities of our measurement scales to meet the International Organization of Legal Metrology (OIML) on OIML international recommendations and weighing multilateral recognition pattern evaluation framework agreement (MAA) to test the technical requirements, marking of scales Measurement test capability into the international advanced level.