A pair of first electrodes 111, 112 is arranged in a state being separated in a direction parallel to a contact surface 102 of a base material 10 made of a dielectric and being at least partially in contact with the base material 10. A pair of second electrodes 121, 122 is arranged in a state of overlapping at least one of the pair of first electrodes and sandwiching the base material 10 at a position farther from the contact surface 102 of the base material 10 than the pair of first electrodes 111 and 112 in a direction perpendicular to the contact surface 102 of the base material 10. The proximity state of an object Q with respect to the contact surface 102 of the base material 10 is detected according to the measurement result of the capacitance C1 between the pair of first electrodes 111 and 112.

A handle module may have at least one actuating module for triggering a switching function. The actuating module may be designed as a capacitive actuating sensor and may have two or more capacitive auxiliary electrodes for detecting secondary signals. The actuating module may also have a capacitive main electrode for detecting an actuation path. And, the actuating module may also have an electronic evaluation unit which is connected to the auxiliary electrodes and the main electrode. The evaluation unit may be configured to trigger or block a switching signal for the switching function as a function of the detected signals of the auxiliary electrodes and the detected signal of the main electrode.

A capacitive sensor that includes: a sensing electrode having a capacitance to be measured; an alternating voltage source, configured to apply an alternating voltage to the sensing electrode; a capacitive first transfer device; a measurement circuit configured to measure the capacitance of the sensing electrode; and a switching arrangement. The switching arrangement is configured to alternately, in a first switching state, connect the first transfer device to the sensing electrode to enable a charge transfer from the sensing electrode to the first transfer device and, in a second switching state, connect the first transfer device to the measurement circuit to enable a charge transfer from the first transfer device to the measurement circuit.

An input apparatus includes a plurality of electrodes spaced apart from each other, a signal processing unit configured to output an input signal depending on a change in a capacitance of each electrode, and a determination unit configured to determine whether an operation object comes in a proximity of at least one of electrodes based on input signals output from the signal processing unit. The determination unit makes a determination such that in a case where one of the input signals is greater than or equal to a first threshold value and an integral value of another of the plurality of input signals in a predetermined integration period is greater than or equal to a second threshold value, it is determined that an operation object has come in a proximity of an electrode corresponding to the one of the input signals.

A capacitance detection circuit, a detection chip, and an electronic device are provided. The circuit includes: a first drive module, a conversion module, a processing module, and a control module. The first drive module is configured to charge a first capacitor to be detected. The conversion module is configured to perform charge conversion processing on the first capacitor to be detected to generate an output voltage. The control module is configured to control a first suppression module of the conversion module to suppress an interference signal with a frequency less than a first frequency or greater than a second frequency when the conversion module generates the output voltage, and the second frequency is greater than the first frequency. The processing module is configured to determine a capacitance change before and after the first capacitor to be detected is affected by an applied electric field based on the output voltage.

Where: the resonance frequency of an LCR resonance circuit 20 is f1 and the determination voltage signal is V1, when an object is not in the proximity of a sensor electrode 22; the resonance frequency of the LCR resonance circuit 20 is f2 and the determination voltage signal is V2, when a human body is in proximity of the sensor electrode 22; and the resonance frequency of the LCR resonance circuit 20 is f3 and the determination voltage signal is V3, when water is in the proximity of the sensor electrode 22, having the relationship

f1>f2>f3, a control unit 42 controls a high-frequency signal S0 so as to satisfy the relationship V2>V1>V3, and a human body or water being in the proximity of the sensor electrode 22 is distinguished.

A hand-held machine tool including a drive device by which a tool that can be brought into operative connection with the machine tool can be actuated, with a control device for actuating the drive device and at least one capacitive sensor element (40) operatively connected to the control device being provided. The at least one sensor element (40) has a first element (42) connected to the control device via a line (44) and a second element (43) which is arranged at a distance from and so as to be displaceable relative to the first element (42) and can be actuated by a user.

The present application provides a capacitance detection module, a method and an electronic device, including: a sensing module and detecting circuit; a first sensing unit is disposed on the first surface of the sensing module, and a second sensing unit is disposed on the second surface of the sensing module; the first sensing unit and the second sensing unit are respectively connected to the detecting circuit; the detecting circuit is configured to determine, according to the capacitance value of the first sensing unit and the capacitance value of the second sensing unit, the wearing state of the user to the device having the capacitance detection module. Thereby the problem that the capacitance detection is affected by temperature is avoided.

A method for detecting the state of the proximity sensor, applied to a terminal including the proximity sensor and an antenna, includes: sending a predetermined instruction to the proximity sensor; determining whether the proximity sensor is abnormal based on a feedback result of the proximity sensor to the predetermined instruction; and maintaining the antenna transmitting power at a low power if the proximity sensor is abnormal. Through the feedback of the proximity sensor to the request to obtain the capacitance value, it is determined whether the proximity sensor can work normally, and in a case that the proximity sensor cannot work normally, the antenna transmitting power is reduced to avoid the continuous high antenna transmitting power due to the inability of the proximity sensor to work normally, which reduces the radiation to the human body.

A method is provided for actuating a hand-held machine tool including a drive device, with a control device for actuating the drive device and at least two capacitive sensor elements operatively connected to the control device being provided. The method includes the following method steps of determining an electrical charge of the first and second sensor element comparing the determined first electrical charge with a defined first threshold value and the determined second electrical charge with a defined second threshold value; enabling the actuation of the drive device and/or defined activation of the drive device via the control device when a predefined condition exists between the determined first electrical charge of the first sensor element and the determined detected second electrical charge of the second sensor element. A machine tool for carrying out a method of this kind is also described.