A capacitance sensing device including a capacitor configured to have a sensed capacitance value that changes according to a proximity of an object, a sampler configured to sample the sensed capacitance value and output a sampling voltage, a voltage-controlled oscillator configured to convert the sampling voltage output from the sampler into an oscillation signal, and a time-to-digital converter configured to convert the oscillation signal into a digital signal, the digital signal including a sensed capacitance value corresponding to a frequency value of the oscillation signal.

An electronic device according to an embodiment include a first antenna, a second antenna, a first capacitor connected to the first antenna, a second capacitor connected to the second antenna, a grip sensor connected to the first antenna through a first electrical path and connected to the second antenna through a second electrical path and at least one processor, wherein at least one processor is configured to identify that a changed value of a first capacitance, caused by the first antenna, obtained through the grip sensor to identify whether the electronic device is gripped, is maintained within a specified range, based on identifying that the changed value of the first capacitance is maintained within the specified range, obtain a changed value of the second capacitance, caused by the second antenna, and based on the changed value of the second capacitance, identify whether the electronic device is gripped.

Embodiments disclosed herein relate to systems, devices and methods for monitoring dimensional changes in medical devices attached to or implanted in the body, such as wound fillers. Disclosed embodiments may facilitate measuring the degree of wound closure by incorporating conductive elements into the wound filler. In some embodiments, the conductive elements may be conductive filler, a flexible conductive element, or an arrangement of discrete non-flexible conductive elements. The density of conductive material in an area or volume of the wound filler upon wound closure may be detected by a detection device that assesses the local dielectric constant of the wound filler, such as through use of a capacitive plate, or by a detection device that measures the resonant frequency of a conductive element.

An analog matching filter includes a first plate, a second plate coupled with the first plate and separated from the first plate via a spacer, and a replicate matching material fixed to an inside surface of the first plate. A conductive plate or sheet is fixed to an inside surface of the second plate. An electrical circuit connects the first plate to the conductive plate or sheet. The replicate matching material and the conductive plate or sheet generate an opposite polarization pattern carried by the electrical circuit that is based on a polarization pattern of a to-be-detected entity according to a spatial gradient of the to-be-detected entity local electric field distribution.

Embodiments disclosed herein relate to systems, devices and methods for monitoring dimensional changes in medical devices attached to or implanted in the body, such as wound fillers. Disclosed embodiments may facilitate measuring the degree of wound closure by incorporating conductive elements into the wound filler. In some embodiments, the conductive elements may be conductive filler, a flexible conductive element, or an arrangement of discrete non-flexible conductive elements. The density of conductive material in an area or volume of the wound filler upon wound closure may be detected by a detection device that assesses the local dielectric constant of the wound filler, such as through use of a capacitive plate, or by a detection device that measures the resonant frequency of a conductive element.

An electric field sensing device. The device includes a substrate, a sensing medium capable of experiencing a change in its electrical resistivity in response to an electric field, and electrodes for use in measuring the change. A method of making an electric field sensing device. The method includes depositing on a substrate a sensing medium capable of experiencing a change in its electrical resistivity in response to an electric field emitted by an object; and placing electrodes for use in measuring the change. An electric field sensing system. The system contains a plurality electric field sensing devices, an arrangement of the plurality sensing devices in a way to detect spatial variation of electric field emitted by objects in an environment; a computer system capable of monitoring the sensing devices, and detecting and comparing differences between the electrical fields sensed by individual devices.

A foreign object detection method for detecting whether a foreign object exists on a function pin of a power supplier side or a power receiver side, wherein the power supplier side and the power receiver side are coupled to each other in a detachable fashion. The foreign object detection method includes: discharging a capacitor via the function pin, wherein the capacitor is electrically connected to the function pin; providing a sensing current flowing through the function pin, to charge the capacitor; sensing a voltage variation of the function pin during a predetermined period; and comparing the voltage variation with a predetermined variation, so as to determine whether a foreign object exists on the function pin.

A sensor device for a motor vehicle includes a printed circuit board on which a sensor electrode of a capacitive sensor is formed. An inductive near-field transmission device is formed with a near-field transmission coil which has a turn on the printed circuit board. The near-field transmission coil and the sensor electrode are arranged relative to each other in such a way that the sensor electrode lies in the inner region of the near-field transmission coil surrounded by the turn. The sensor electrode includes an elongated central conductor and extending therefrom are a plurality of branch conductors. The branch conductors are spaced in such a way that they are galvanically coupled exclusively via the central conductor and are arranged on the central conductor on opposite sides in pairs.

The present application relates to a method of operating a capacitance sensing device comprises: calculating a difference of a raw data compared to one of the raw data received in a previous data frame; and performing a comparison calculation based on the raw data and a stored baseline value to determine whether a proximity event has occurred. Under the proximity event, selects one of several baseline value update procedures based on the magnitude of the difference. Thus, the present application effectively avoids the problem of failure to update the baseline value when the object is close to the capacitance sensing device for a long period of time, which may lead to misjudgment of the capacitance sensing device.

An electric tool includes an output part that comes into contact with a working target to process the working target, a motor that drives the output part, and a sensor that measures capacitance of a metal part comprising the output part. The electric tool detects a foreign object based on a change in the capacitance measured by the sensor.