摘要:
A method of locating metal or non-metal containing objects and materials includes regulating currents in at least two emission coils in relation to each other. A reception coil output signal is received by at least one reception coil or average values of demodulation phases generated from the reception coil output signal are regulated in relation to each other continuously to be zero even when exposed to metal. The amplitude(s) of the required controlled variables are detected as a value by demodulation, preferably at least at 0° and at a demodulation which is set off by 90° and are equalized, thereby allowing a reliable detection of an object to be detected even if other metal objects are present in the area of detection.
摘要:
The method and sensor unit allow the location and detection of metallic or metal-containing objects and materials. A coil arrangement (1.2) comprises a transmission coil and a reception coil, which are arranged on top of one another, wherein the reception coil generates a reception coil output signal. A closed compensation control regulates the reception coil output signal in the receiving coil for compensating changes which occur in the detection range of the reception coil and influence the reception coil. To this end, compensation currents are fed into the receiving branch of the reception coil and are controlled relative to each other such that the reception coil output signal or average values which are detected from the reception coil output signal after demodulation are continuously regulated relative to each other to zero even in the case of metal influence. As a result, a coil with an unregulated transmission current can be used, in which a zero output signal is continuously generated. At the same time, the structural requirements for a compact structure of a sensor arrangement having a one-sided detection range are established.
摘要:
The invention relates to a method for locating metal or metal-containing objects and materials, currents in at least two emission coils being regulated in relation to each other such that a reception coil output signal received by at least one reception coil or average values of demodulation phases generated from the reception coil output signal are regulated in relation to each other continuously to be “zero” even when exposed to metal. The amplitude(s) of the required controlled variable(s) is/are detected as a value by demodulation, preferably at least at 0° and at a demodulation which is set off by 90° and is/are equalized, thereby improving the method such as to allow a reliable detection of an object to be detected even if other metal objects are present in the area of detection.
摘要:
An apparatus for catching an insect sitting on a contact surface. The apparatus includes a casing, a light source disposed in the casing for dazzling and immobilizing the insect on the contact surface, and a catch tube disposed in the casing and movable relative to the casing. The apparatus further includes a catch container disposed adjacent to the catch tube and a slider to lift the insect off the contact surface. The slider is movable relative to the casing.
摘要:
An apparatus for capacitively measuring changes has a sensor (S) with a sensor-active region. The sensor has at least one transmitting electrode, which generates an electric field, and a further electrode (13) which is capacitively coupled to the transmitting electrode (15), wherein the transmitting electrode (15) is arranged between the further electrode (13) and an element (11) which is at a reference potential. An output of a driver/evaluation unit (5.0) is coupled to the transmitting electrode (15) and an input of the driver/evaluation unit (5.0) is coupled at high impedance to the further electrode (13), an electric field forming between the further electrode (13) and a reference potential on account of the electric field, generated by the transmitting electrode (15), between the transmitting electrode (15) and the further electrode (13). A change in the capacitance between the further electrode (13) and the reference potential is thus detected using the driver/evaluation unit (5.0). This provides a capacitive sensor which can be used to reliably detect changes in the sensor environment and is insensitive to a reference potential even in the case of a coating (18) or wetting (18).
摘要:
A circuit provided with an optoelectronic display unit. For discrete display of the settings of a regulating/control unit, said circuit comprises at least one detection element for detecting the actuation of an object in order to modify the settings of the regulating/control unit, whereby the detection element delivers an output signal corresponding to the desired modification. Several luminous diodes (1a, . . . , 1n), which are essentially arranged next to each other in a row and which emit luminous radiation, are used as display elements. A control device controls at least one of the luminous diodes (1a, . . . , 1n) according to the output signal in order to display the respective setting, in addition to the regulating/control unit for modification of the setting. In order to produce a quality display and operator unit, at least two receiver elements which are sensitive with respective to the luminous radiation of the luminous diodes (1a, . . . , 1n) are provided, acting as detection elements in order to detect the luminous radiation reflected by at least one luminous diode (1c) and by an object (2), and the control device controls at least one of the luminous diodes in addition to the regulating/control unit as a result of the output signal, which is formed according to the movement of the object relative to the luminous diode (1c) emitting luminous radiation, according to the movement of said object.
摘要:
A device for controlling lighting, especially inside the passenger compartments of vehicles, including at least one light source and at least one sensor which influences the light source and which detects at least the movement of a body within the active range of the sensor. A control unit, which is used to control the light source according to a sensor signal provided by a sensor, is associated with the light source. Control unit, which are controlled by the control unit, track the light from the at least one light source according to a sensor signal corresponding to the position of the body. The invention also relates to a method for controlling the device.
摘要:
The invention relates to a method and a device for opto-electronically determining the position of an object (50) using a measurement assembly, which is separated from the object (50) by a medium (31, 52) that is permeable to at least one type of specific radiation. The measurement assembly consists of at least one active sensor zone (S) in the medium comprising at least two measuring paths (x, y), which are maintained by at least two radiation sources (1, 3) that emit the specified radiation and by at least one radiation receiver (2) that is allocated to the radiation sources. Said receiver determines the reflection (53) returned by the object (50) to generate a detection signal which corresponds to the received radiation. A specified radiation is emitted using the radiation sources (1, 3) and the reflection (53) returned by the object (50) is detected, in order to allocate initial values (U(t), UR(d)) to the individual measuring paths. The invention is characterised in that an evaluation unit (55) determines the position and/or displacement of the object (50) by determining a specified angular curve of the object in relation to the radiation sources (1, 3, 57) from the initial value (UR(T), UR(d)), for a known spatial relationship between the radiation sources. This allows the position and/or displacement of an object to be opto-electronically detected in a simple and practical manner.
摘要:
A rain sensor to detect humidity drops inside an area on a transparent window has at least one transmitting element to emit optical rays into the window and has at least one receiving element to receive at least one part of the emitted optical rays where the intensity of the optical rays received is dependent on the number of humidity drops in the area of the window observed by the rain sensor. So that interference from the rain sensor with radio broadcasts is effectively reduced and, if possible even completely prevented, the rain sensor has a generator to generate an electrical signal which has a lower harmonic content than square-wave signals, preferably a sine-wave electrical signal to power each transmitting element of the rain sensor.
摘要:
The invention relates to a device for influencing a lighting installation, and more particularly, includes a lighting installation of a motor vehicle, depending on ambient light. The device comprises a switching device to turn the lighting installation on and off. At least one optical sensor is provided to detect the wavelength of the ambient light. An evaluation device sends a control signal to the switching device when the wavelengths of the ambient light detected by the sensor are essentially those contained in the daylight. Since the filter and the sensor are jointly formed by at least one light emitting diode which operates as a light-sensitive element, the passing lights can be automatically turned on in a simple and favorable manner.