A fully automatic calibration system for pressure gauges with pointers is presented, including a calibration management system of pressure gauges and an automatic reading system of pointer readings. The operation is very convenient with the use of visual interface in this system. The operator only needs to input several necessary coefficients such as range, accuracy and so on, the pointer reading of pressure gauges will be read automatically. The automatic reading method will be used to calibrate for almost all kinds of pointer gauges. The accuracy is decided by resolution and processing time. This automatic calibration system improves the present state of pressure calibration, and enhances the automation level of calibration to some extent.%设计并开发了一种指针式压力表自动检定系统.该系统包括压力表检定/校准管理系统和仪表示值自动判读系统两部分.系统的可视化界面使得操作非常简单,操作人员只需输入量程、精度等必要参数,压力表的指针读数即可自动读出.给出的自动判读方法可用于各种指针式仪表精度的自动检测、判读,其精度取决于图像的分辨率和限定的处理时间.本系统可较大地改善压力表人工检定工作的落后状况,在一定程度上提高了检定工作的自动化水平和检定结果的稳定性.
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