A physical quantity sensor includes: a substrate; a movable body including, with a first axis as a boundary, a first movable electrode portion disposed in a first region, a second movable electrode portion disposed in a second region, and a damping adjusting portion disposed in at least one of the first region and the second region; beam portions supporting the movable body; a first fixed electrode portion; and a second fixed electrode portion. A first through-hole is disposed in the damping adjusting portion. Second through-holes are disposed in the movable electrode portions. The area of a region where the first movable electrode portion overlaps with the first fixed electrode portion is the same as the area of a region where the second movable electrode portion overlaps with the second fixed electrode portion. The width of the first through-hole is greater than the widths of the second through-holes.

Physical quantity sensor and electronic apparatus

Device (1) for detecting the state of a leaf (10) of doors, gates or the like, comprising a magnetometer (2) that can move with respect to a reference geometric plane (x'-y') that has a substantially fixed orientation with respect to an external magnetic field (B), the magnetometer (2) being connected to a control unit (3) that is configured to produce a movement of the magnetometer (2) with respect to a preset position, on the basis of a measurement of the external magnetic field (B) which is detected by the magnetometer (2); in addition or as an alternative to the magnetometer (2), the device (1) can comprise an accelerometer (5).

Device for detecting the state of a leaf of doors, gates and the like

The present invention provides a motion state detection device, a motion state detection method and a motion state detection system. The device includes a gravity sensor for sensing acceleration and outputting the X-axis component, Y-axis component and Z-axis component of the acceleration, a magnetometer for sensing magnetic field intensity and outputting the X-axis component, Y-axis component and Z-axis component of the magnetic field intensity, a processor used for acquiring the three-axis components of the gravity sensor and the three-axis components of the magnetometer and processing the three-axis components of the gravity sensor and the three-axis components of the magnetometer so as to identify a motion state, and a wireless module used for transmitting identified motion state information. According to the motion state detection device, the motion state detection method and the motion state detection system of the invention, data outputted by the gravity sensor and the magnetometer are processed so as to fit the characteristic value of a motion model, and therefore, the motion state of a measured object can be judged, and accurate identification of the motion state of the measured object can be realized.

Motion state detection device, method and system

The invention relates to a maintenance-free wireless door sensor and a wireless door sensor system The door sensor comprises a door sensor body and a door sensor pedestal; the door sensor body is fixed on the door sensor pedestal; and the door sensor body comprises a casing, a chargeable battery, a solar cell panel, a wireless energy collecting and converting device, a USB charging interface and a mini coil, wherein the solar cell panel is arranged on the casing, the wireless energy collecting and converting device is arranged in the casing, the USB charging interface is arranged at one side of the casing, and the mini coil is arranged in the casing The maintenance-free wireless door sensor of the structure can ensure that the door sensor does not require maintenance in the service life and realize maintenance-free automatic power supply, and is simple in structure and wide in application range

Maintenance-free wireless door sensor and wireless door sensor system

The embodiment of the invention provides a door status detection method and device for improving the accuracy of door status detection results. The method comprises the following steps: acquiring a first magnetic field vector of a door detected by a first sensor at a current position; determining an opening angle of the door according to the first magnetic field vector and a corresponding relation between the opening angle and the magnetic field vector, wherein the opening angle is an angle of the current position of the door relative to a position when the door is closed; and determining the current state of the door according to the determined opening angle.

Door status detection method and device

The invention relates to a device and a method for determining states of an object which is to be monitored, such as for example, a window or a door. The measurement values of several sensors, in particular a magnetometer and an acceleration sensor are consolidated and evaluated together. In order to determine a new state from a group of predetermined states, only actual possible state transitions are taken into account. State transitions which are not possible and/or which are not allowed are not taken into account.

Device and method for determining a state of an object which is to be monitored

Die vorliegende Erfindung schafft eine Vorrichtungen ein Verfahren zum Bestimmen von Zustanden eines zu uberwachenden Objekts, wie beispielsweise einem Fenster oder einer Tur. Dabei werden die Messwerte von mehreren Sensoren, insbesondere einem Magnetometer und einem Beschleunigungssensor, fusioniert und gemeinsam ausgewertet. Zur Bestimmung eines neuen Zustands aus einer Gruppe von vorbestimmten Zustanden werden dabei nur tatsachlich mogliche Zustandsubergange berucksichtigt. Nicht mogliche bzw. nicht erlaubte Zustandsubergange bleiben unberucksichtigt.

Vorrichtung und verfahren zum bestimmen eines zustands eines zu überwachenden objekts

The acceleration sensor (1) has a substrate (2), a seismic mass (10) and a detection unit (20), where the seismic mass is deflected due to an applied external acceleration in the form of a deflection movement (11) relative to the substrate along a direction of deflection (101). The detection unit is coupled with the seismic mass such that the amplitude of the deflection movement along the direction of deflection is greater than the amplitude of a detecting motion (21) along the direction of detection (102). An independent claim is included for an operating method for operation of an acceleration sensor.

Acceleration sensor has detection unit, which is coupled with seismic mass such that amplitude of deflection movement along direction of deflection is greater than amplitude of detecting motion along direction of detection

The hand-held power tool device (10a) has an impact unit (12a) with a control unit (14a) which is provided to control an impact characteristic. The control unit has a processing unit (16a) which is provided to determine a feedback variable of the impact characteristic depending on a parameter. The control unit has a control routine (18a) which is provided to control the impact characteristic related to a working point.

Handheld machine-tool device and handheld machine-tool

The method involves applying two electrical positive and negative test voltages between two electrodes (2, 3) of a sensor module (1) with respect to a reference voltage. Two electrical capacitances between the electrodes are measured by capacitance-detecting devices. An electrical offset voltage of the sensor module is determined depending on the capacitances. A capacitance-voltage-characteristic curve of the sensor module is determined by the capacitances. A compensation-voltage is determined for compensation of the offset voltage. An independent claim is also included for a sensor module having an acceleration sensor and two electrodes.

Sensor module operating method, involves measuring two electrical capacitances between electrodes by capacitance-detecting devices and determining electrical offset voltage of sensor module depending on capacitances

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