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压力仪器
压力表检测仪器仪表
Dead weight testers are used for examination and calibration of pressure gauges and other pressure measuring instruments without using an external instrument. The main components are the measuring system, the valve units, the built-in screw pump for accurate pressure adjustment and the set of weights. The measuring system itself consists of a precise lapped-in pair of piston and cylinder. Dur
基于虚拟仪器的压力开关测试系统设计
基于虚拟仪器的压力开关测试系统设计
设计了压力开关参数测试系统,能同时实现5个产品的触点接触电阻、绝缘电阻测试,动作压力和恢复压力测试。系统采用虚拟仪器技术,构建了以工控计算机及其板卡为硬件平台,以LabVIEW为软件平台的虚拟仪器测试系统。采用四端钮接法,实现了微电阻的测量,利用继电器逻辑实现了5个产品多参量的自动测试,并能根据测试结果自动判别产品是否合格。结果表明,该系统运行可靠,测试准确度高,测试效率高。