Device and method for monitoring oil pressure in oil cylinder of diaphragm compressor

A method for monitoring oil pressure in an oil cylinder of a diaphragm compressor by a device, wherein the device comprises:

• a piston rod and a strain gauge circuit, wherein the strain gauge circuit comprises a strain gauge component and a bridge circuit connected, and the strain gauge component is arranged on a surface of the piston rod, wherein comprising:
• Step 1:
• synchronously collecting, by a signal collection unit, a first voltage signal and a second voltage signal outputted by the strain gauge circuit, converting the collected first voltage signal into a first digital signal for storage, and converting the collected second voltage signal into a second digital signal for storage;
• Step 2:
• determining the starting and ending time of one complete cycle according to the first digital signal;
• and
• Step 3:
• processing the second digital signal according to the starting and ending time of the complete cycle to obtain an oil pressure value,
• wherein a photoelectric sensor unit comprises a flywheel, the flywheel and the photoelectric sensor are arranged correspondingly, the signal collection unit is connected to the strain gauge component, and the signal collection unit is connected to the photoelectric sensor;
• the signal collection unit is connected to a data processing unit.