METHOD OF MONITORING PRESSURE AT INLET OF GAS ELECTROMAGNETIC VALVE AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2024 - IPC F16K31/02 G05D16/00 H01F7/18 

FIELD: electrical engineering.

SUBSTANCE: method of monitoring pressure at the inlet of a normally closed gas electromagnetic valve (EMV) involves determination of the local current maximum at the beginning of the electromagnet (EM) armature movement when supply voltage is applied to its winding. Signal corresponding to current value in EM winding is processed by low-pass filter. Value of the local maximum of the filtered signal is determined from several of its successive readings and used to determine the value of pressure at the inlet of the gas EMV at the moment of its opening using the EMV passport data on the dependence of the local maximum of the filtered signal on the pressure at the EMV inlet for the known value of supply voltage. Voltage of the power supply is stabilized, a threshold value of current in the winding is set, and the time interval from the moment of connection of the power supply to the winding of the valve EV is measured to the moment when the current in the winding reaches the threshold value. Measured values of this time interval and the local maximum of the filtered signal corresponding to the current value in the EM winding are used to determine the pressure value at the inlet of the gas EMV at the moment of its opening. Threshold value of current in the winding is selected below the minimum possible value of current in the winding, at which during operation of the EM valve its actuation is possible. To implement the disclosed method, a functional diagram of the device is disclosed. Most of the elements of this circuit, which provide processing of current and time interval measurement signals, are made using resources of the microcontroller and its internal peripheral modules.

EFFECT: broader functional capabilities of pressure monitoring, including determination of a specific value of gas pressure at the inlet of the electromagnetic valve (EMV) and change in the value of the initial gap between the armature and the stop of the electromagnet (EM) during operation of the EMV.

7 cl, 10 dwg, 5 tbl