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US 9,244,117 B2Granted
Systems and methods for implementing S/SSTDR measurements
AssigneeLiveWire Innovation, Inc.
InventorsCynthia Furse, Faisal Khan
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Abstract
Systems and methods which utilize spread spectrum sensing on live circuits to obtain information regarding a circuit under test are provided. In some embodiments S/SSTDR testing may be utilized to obtain R, L, C and Z measurements from circuit components. In yet further embodiments, these measurements may be utilized to monitor the output of sensors on a circuit.
Claims18
A method for testing a device in its operating environment, the method comprising:
- forming, by a testing device, a spread spectrum time domain reflectometry (S/SSTDR) signal;
- transmitting the formed signal to an electronic circuit in its operating environment which is communicatively connected to the testing device;
- receiving one or more reflections of the S/SSTDR signal at the testing device;
- and
- receiving one or more reflections from a choke or other known impedance within the electronic circuit;
- and
- processing the received S/SSTDR signal utilizing the one or more reflections from said choke or other known impedance as a reference signal to determine an electrical property of at least one component residing in the electronic circuit, wherein the electrical property is at least one of resistance, inductance and capacitance.
4 more elements
An apparatus comprising:
- at least one processing device configured to:
- form a spread spectrum time domain reflectometry (S/SSTDR) signal;
- transmit the formed signal to an electronic circuit in its operating environment which is communicatively connected to the testing device;
- receive one or more reflections of the S/SSTDR signal at the at least one processing device;
- receive one or more reflections from a choke within the electronic circuit;
- and
- process the received S/SSTDR signal utilizing the one or more reflections from said choke as a reference signal to determine an electrical property of at least one component residing in the electronic circuit, wherein the electrical property is at least one of resistance, inductance, capacitance, impedance and location of the at least one component.
4 more elements
Dependencies are inferred from the claim text.