Diaphragm chamber of positive displacement pump

The utility model relates to the technical field of positive displacement pumps, in particular to a positive displacement pump diaphragm chamber which comprises a pump body and a microcontroller, a diaphragm chamber body is arranged in the pump body, a diaphragm body is arranged in the diaphragm chamber body, a cavity in the diaphragm chamber body is divided into two parts by the diaphragm body, one part is a control cavity used for reciprocating motion of the diaphragm body, and the other part is a control cavity used for reciprocating motion of the diaphragm body. A piston cylinder connected with the control cavity is arranged on the diaphragm chamber body, a signal rod is arranged in the piston cylinder, one end of the signal rod extends into the control cavity to be fixedly connected with the diaphragm body, a sensing device used for measuring the position of the signal rod is arranged in the piston cylinder, and the sensing device is electrically connected with the microcontroller; the signal rod is arra