Voltage detection system and method
AssigneeSignify Holding B.V.
InventorHong CHEN
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Abstract
A voltage sensing device is for sensing an operating voltage of a remote device, based on the measurement of time intervals associated with a chain of repeated communications with the device. The operating voltage of the remote device influences the rise time and fall times of signals sent by the remote device, and these differences in edge slopes of the signals influence the points in time at which signals are detected at the receiving end. Thus, the operating voltage influences a measured transit time of the signals.
Claims15
A voltage sensing device for sensing an operating voltage of a remote device, comprising:
- a controller for communicating electronically with the remote device over a communications interface,
- wherein the controller is adapted to:
- initiate a chain of repeated sequential communications between the voltage sensing device and the remote device, each communication comprising transmission of a challenge signal to the remote device and reception of a response signal per challenge signal;
- measure time intervals presenting between transmissions of challenge signals and receptions of the response signals associated with the chain of repeated communications;
- and
- from the measured time intervals, determine an operating voltage based on a relationship between voltage and time interval for the remote device.
A voltage sensing method, comprising:
- initiating a chain of repeated sequential communications between a voltage sensing device having a controller and a remote device, each communication comprising transmission of a challenge signal to the remote device and reception of a response signal per challenge signal;
- measuring time intervals presenting between transmissions of challenge signals and receptions of the response signals associated with the chain of repeated communications;
- and
- from the measured time interval, determining an operating voltage of the remote device based on a relationship between voltage and time interval for the remote device.
Dependencies are inferred from the claim text.