Circuit state sensing
AssigneeBAE SYSTEMS plc
InventorDavid Christopher D'Oyly-Watkins
Life of this patent
Estimating the term…
Abstract
A circuit state sensing device (100) includes a transformer (102) having a primary coil (104A) and a secondary coil (104B). In use, the secondary coil is connected to a target circuit (106) for which a state is to be sensed. The device further includes a measuring arrangement (112, 122) configured to take a measurement relating to impedance at the primary coil, and a processing arrangement (122) configured to process the impedance measurement to determine a state of the target circuit.
Claims19
A circuit state sensing device, comprising:
- a plurality of transformers each having a primary coil and a secondary coil, in use, each of the secondary coils being connected to an associated one of a plurality of target circuits for which a state is to be sensed;
- a measuring arrangement configured to take measurements relating to impedance at the primary coil of each of the transformers;
- and
- a processing arrangement configured to process the measurement to determine a state of each of the target circuits.
A method of sensing a state of a circuit, the method including:
- providing a plurality of transformers each having a primary coil and a secondary coil;
- connecting each of the secondary coils, in use, to an associated one of a plurality of target circuits for which a state is to be sensed;
- taking a measurement relating to impedance at each of the primary coils;
- and
- processing the impedance measurement to determine a state of each of the target circuits.
A circuit state sensing device, comprising:
- a plurality of transformers each having a primary coil and a secondary coil, in use, each of the secondary coils being connected to an associated one of a plurality of target circuits for which a state is to be sensed;
- a switch circuit connected in series with the primary coil of each of the target circuits;
- and
- a controller circuit configured to control the switch circuit and take a measurement relating to impedance at the primary coil of each of the transformers when the switch circuit is engaged so as to allow current flow through the primary coil of each of the transformers, the controller circuit further configured to process the measurement to determine a state of each of the target circuits.
Dependencies are inferred from the claim text.