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US 12,699,115 B2Granted
Electrostatic charge variation based power failure detection
AssigneeSTMicroelectronics International N.V.
InventorsFederico Rizzardini, Lorenzo Bracco
Life of this patent
Estimating the term…
Abstract
The present disclosure is directed to devices and methods for performing power failure detection. A power failure is detected using an electrostatic charge variation sensor that measures variation of electrostatic charge in a surrounding environment. Power failure is detected wirelessly and without being directly connected to the power network. Further, the electrostatic charge variation sensor has low power consumption and allows for customization of detection sensitivity.
Claims18
A device, comprising:
- a sensor device including:
- an electrostatic charge variation sensor including an electrode configured to receive a variation of electrostatic charge generated by a power source, the electrostatic charge variation sensor configured to generate an electrostatic charge variation measurement signal of the variation of electrostatic charge;
- and
- a processor configured to:
- filter the electrostatic charge variation measurement signal with a filter;
- determine an envelope signal of the filtered electrostatic charge variation measurement signal;
- detect a power failure of the power source based on the envelope signal and a threshold value;
- and
- output a power failure flag in response to the power failure being detected;
- and
- a host processor communicatively coupled to the sensor device, the host processor configured to determine the threshold value.
8 more elements
A method, comprising:
- receiving, by an electrode of an electrostatic charge variation sensor included in a sensor device, a variation of electrostatic charge generated by a power source;
- generating, by the electrostatic charge variation sensor, an electrostatic charge variation measurement signal of the variation of electrostatic charge;
- filtering, by a processor included in the sensor device, the electrostatic charge variation measurement signal with a filter;
- determining, by the processor, an envelope signal of the filtered electrostatic charge variation measurement signal;
- detecting, by the processor, a power failure of the power source based on the envelope signal and a threshold value;
- and
- outputting, by the processor, a power failure flag in response to the power failure being detected.
4 more elements
A device, comprising:
- a sensor device including:
- an electrostatic charge variation sensor including an electrode configured to receive a variation of electrostatic charge generated by a power source, the electrostatic charge variation sensor configured to generate an electrostatic charge variation measurement signal of the variation of electrostatic charge;
- and
- a processor configured to:
- filter the electrostatic charge variation measurement signal with a first filter;
- determine an absolute signal of the filtered electrostatic charge variation measurement signal;
- filter the absolute signal with a second filter different from the first filter;
- detect a power failure of the power source based on the filtered absolute signal and a threshold value;
- and
- output a power failure flag in response to the power failure being detected;
- and
- a host processor communicatively coupled to the sensor device, the host processor configured to determine the threshold value.
9 more elements
A method, comprising:
- receiving, by an electrode of an electrostatic charge variation sensor included in a sensor device, a variation of electrostatic charge generated by a power source;
- generating, by the electrostatic charge variation sensor, an electrostatic charge variation measurement signal of the variation of electrostatic charge;
- filtering, by a processor included in the sensor device, the electrostatic charge variation measurement signal with a first filter;
- determining, by the processor, an absolute signal of the filtered electrostatic charge variation measurement signal;
- filtering, by the processor, the absolute signal with a second filter different from the first filter;
- detecting, by the processor, a power failure of the power source based on the filtered absolute signal and a threshold value;
- and
- outputting, by the processor, a power failure flag in response to the power failure being detected.
5 more elements
Dependencies are inferred from the claim text.