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US 2023/0249018 A1Published application
Solenoid supervisory system
AssigneePotter Electric Signal Company, LLC
InventorsTimothy B. Decker, Michael F. Cabral, Andrew Louis Berry
Life of this patent
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Abstract
Systems and methods for a solenoid supervisory detection system which can detect the presence or absence of a solenoid plunger within a solenoid coil. These systems can be used to verify correct reassembly of a solenoid valve after it has been disassembled for testing.
Claims9
A system for detecting the presence of a solenoid plunger within a solenoid coil, the system comprising:
- a solenoid coil assembly comprising a solenoid winding;
- a solenoid plunger assembly comprising a solenoid plunger;
- an electric circuit connected to said solenoid winding, said circuit comprising:
- an isolated power supply;
- a Colpitts oscillator;
- a low pass filter, rectifying and attenuating output of the oscillator;
- a non-inverting amplifier, amplifying output of the low pass filter;
- a comparator for comparing output of said amplifier against a set voltage;
- and
- a monostable multivibrator acting on output of said comparator to drive a FET opto-coupler.
7 more elements
A method for detecting the reassembly of a deluge valve in a fire sprinkler system, the method comprising:
- providing a deluge valve including a solenoid formed of a solenoid plunger removable from within a solenoid coil;
- connecting a circuit to said solenoid coil;
- measuring from said circuit, at least one of said inductance or said capacitance of said solenoid coil;
- and
- determining from said measuring, if said solenoid plunger is within said solenoid coil.
2 more elements
Dependencies are inferred from the claim text.