Two wire pressure indicating switch with all electronic architecture with millivolt operating supply
AssigneeHydra-Electric Company
InventorRobert Andrew Guziak
Life of this patent
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Abstract
Systems, devices, and methods for a two wire detection circuit powered system comprising: an electronic switch circuit configured to sense a pressure level above or below a predetermined value and indicate an open or closed switch condition, where the electronic switch circuit provides a contact resistance voltage of about 20 mV in the closed switch condition; and an energy harvester configured to convert 20 mV when the electronic switch circuit is in the closed switch condition to an operating voltage between 3.6 Volts and 5 Volts for the electronic switch circuit to operate without an additional power source.
Claims15
A two wire detection circuit powered system comprising:
- an electronic switch circuit configured to sense a pressure level relative to a predetermined value and indicate an open or closed switch condition based on the pressure level, wherein the electronic switch circuit further comprises:
- a pressure sensing device configured to sense the pressure level and generate a sense element signal indicating the sensed pressure level;
- a comparator device configured to receive the sense element signal from the pressure sensing device and generate a control signal, wherein the control signal indicates the detected pressure level as higher or lower than a preset threshold;
- and
- an electronic pressure switch configured to receive the control signal from the comparator device, wherein the electronic pressure switch is turned on or off based on the control signal, and wherein power is derived from a sense circuit;
- and
- an energy harvester configured to convert an indication of the open or closed switch condition from the electronic switch circuit to an operating signal for the electronic switch circuit to operate, wherein the operating signal drives electronic components of the electronic switch circuit in addition to a power source.
A method for a two wire detection circuit comprising:
- sensing, by an electronic switch circuit, a pressure level relative to a predetermined value;
- indicating, by the electronic switch circuit, an open or closed switch condition based on the pressure level;
- converting, by an energy harvester, an indication of the open or closed switch condition from the electronic switch circuit to an operating signal for the electronic switch circuit to operate;
- sensing, by a pressure sensing device, the pressure level;
- generating, by the pressure sensing device, a sense element signal indicating the sensed pressure level;
- receiving, by a comparator device, the sense element signal from the pressure sensing device;
- generating, by the comparator device, a control signal, wherein the control signal indicates the detected pressure level as higher or lower than a preset threshold;
- receiving, by an electronic pressure switch, the generated control signal from the comparator device;
- and
- turning the electronic pressure switch on or off based on the control signal, wherein power is derived from a sense circuit.
Dependencies are inferred from the claim text.