该校验仪通过步进电机对密度继电器压力进行调节，并通过模数转换电路采集压力传感器的输出，实现对密度继电器报警及闭锁压力的测量。
It can control the stepper motor to change the pressure of the relay, and the A/D circuit samples the signal of the pressure sensor and then acquires the lock or alarm value after processing.
目的研究压力机气垫闭锁参数的快速检测方法。
Aim \ To study the way of fast detecting the parameters about the interlock of press 'air cushion.
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