460results about How to "Sensitivity adjustable" patented technology

The sensitivity of a motion sensor or detector in a security system is adjusted by a remotely-transmitted signal, such as from a user interface device in the security system. In another approach, a pet wears a transmitter on its collar that transmits a wireless signal to command the motion sensor to adjust its sensitivity, e.g., by entering a pet immune mode, when the pet is in the room that is protected by the motion sensor. In another approach, a remote monitoring site sends instructions to the motion sensor via a communication interface. The sensitivity can be adjusted by adjusting a pulse count, optical gain, or electrical or optical sensitivity of the motion sensor.

A photosensor and a display unit are fabricated on the same substrate. Input coordinates are identified by comparing the light quantities at positions (pixels) which is and is not touched by a finger or the like by use of a comparison circuit. Thus, TFTs to form the photosensor can be fabricated on the same substrate in the same process, and also reductions in manufacturing cost and the number of parts can be realized. A region required for disposing a sensor in the circumference becomes unnecessary, thus realizing the miniaturization of the device. Moreover, since a region to be a blind spot is eliminated in the display unit, it is possible to utilize the display unit effectively. It is possible to improve the precision of an input recognition and to uniformly perform detection all over the display unit. Furthermore, since the photosensor is constituted of a photoreceptor circuit which is capable of adjusting the sensitivity of receiving light, it is possible to make the sensitivity of receiving light (detection) uniform in the display unit.

A magnetic field sensing device for determining the strength of a magnetic field, includes four magnetic tunnel junction elements or element arrays (100) configured as a bridge (200). A current source is coupled to a current line (116) disposed near each of the four magnetic tunnel junction elements (100) for selectively supplying temporally spaced first and second currents. Sampling circuitry (412, 414) coupled to the current source samples the bridge output during the first and second currents and determines the value of the magnetic field from the difference of the first and second values. A method for sensing the magnetic field includes supplying a first current to the current line (116), supplying a second current the current line (116), sampling the value at the output for each of the first and second currents, determining the difference between the sampled values during each of the first and second currents, and determining a measured magnetic field based on the determined difference.

The invention discloses a dielectric-varied capacitive flexible three-dimensional force tactile sensor. The dielectric-varied capacitive flexible three-dimensional force tactile sensor is characterized in that a flexible printed circuit board is arranged, wherein a square common electrode and four identical rectangular induction electrodes which are located on the periphery of the edges of the common electrode in an equidistant mode are printed on the printed circuit board; the induction electrodes are in two-to-two symmetry with the center of the common electrode serving as the symmetry point; a composite multi-dielectric layer is fixed to the flexible printed circuit board; the composite multi-dielectric layer is formed by an inversely-concave PDMS dielectric layer and an air dielectric layer located in a groove of the PDMS dielectric layer; the composite multi-dielectric layer is buckled on the upper portion of the flexible printed circuit board, and the common electrode and the four induction electrodes are located in the air dielectric layer; a PDMS hemispheric contactor is arranged on the composite multi-dielectric layer. According to the dielectric-varied capacitive flexible three-dimensional force tactile sensor, the common electrode and the induction electrodes are located on the same plane; compared with a traditional capacitive tactile sensor of an up-down electrode structure, the dielectric-varied capacitive flexible three-dimensional force tactile sensor has the advantages of being simple in manufacturing process and capable of being easily arrayed.

A hydraulic brake lever for a bicycle, comprising a main body, a pull handle, and an adjusting mechanism. Thus, the hydraulic brake lever can be operated conveniently and smoothly, thereby facilitating the rider operating the hydraulic brake lever. In addition, the hydraulic brake lever is sensitive, thereby protecting the rider's safety. Further, the operation stroke of the brake can be changed and adjusted conveniently, so as to adjust the sensitivity of the brake to the optimum state.

Provided is a liquid crystal panel equipped with a touch sensor function that can detect pressing force. Multiple displacement detection units (30) are provided between a pair of substrates (31, 32) arranged opposing each other and output a signal due to displacement of one of the substrates. A displacement point detection unit (3) binarily detects whether the one substrate has become displaced at each position of the displacement detection units (30) based on the signals output from the displacement detection units (30). A coordinate detection unit (4) detects the coordinates of, among the displacement detection units (30), the displacement detection units for which the displacement point detection unit (3) detected that the one substrate became displaced, and outputs pressing force position information. A displacement point counting unit (5) counts the number of displacement detection units for which the displacement point detection unit (3) detected that displacement occurred among the displacement detection units (30), and a pressing force deriving unit (6) outputs information regarding a pressing force intensity based on the number of displacement detection units counted by the displacement point counting unit (5).

The invention discloses a quasi-close loop starting method of a brushless direct current motor free of a position sensor, namely a quasi-close loop three-stage starting method with rotor initial position accurate pre-positioning and optimization positioning in the acceleration process combined. Short-time pulse voltage vectors are exerted in a motor winding, the rotor position can be locked in a range within 60-degree electrical angles by detecting direct-current bus current, and rotor accurate pre-positioning is completed by electrifying a designated winding, detecting current and comparing the current on the basis of rotor position locking. After rotor position pre-positioning, rotors enter the optimization positioning and acceleration stage, current differentials serve as the phase change conditions in the threshold range so that the rotors are ensured to change phase accurately in the acceleration process, and a system is switched into a counter electromotive force operation state. Experimental results show that the quasi-close loop three-stage starting method is low in cost and high in reliability, and can ensure that the system is in the quasi-close loop working state in the whole starting process and cannot have step-out and starting failure.

An intrusion sensing device includes an intrusion detection sensor enclosed within a housing and operable to detect an intrusion into a container. A mounting detection mechanism contacts the surface of the container when the housing is mounted thereto and is operable to detect when the housing is not in contact with the surface of the container. An access detection mechanism is operably connected to an access panel of the housing and operable to detect removal of the access panel from the housing. A control module is operable in a setup mode and an active mode. The control module is adapted to receive an alarm message from the intrusion detection sensor and operable to initiate an alarm event during the setup mode which varies from an alarm event initiated during the active mode. A wireless transmitter is operable to transmit an alarm indication signal to a remote monitoring system.

An electronic device and method are disclosed that relate to the selection of a control algorithm for optimizing the performance of a device that is controlled by a user initiated touching of the device that creates a capacitive coupling. The device and method entail the use of a motion sensor to gather data related to the movement of the device, a means for analyzing the data to select an optimal control algorithm, and implementing the control algorithm.

A sensitivity adjustment device adjusts radio wave sensitivity of an antenna which wirelessly transmits/receives a signal to/from an external device. The sensitivity adjustment device includes a case and a ring-shaped rotating member. The case houses the antenna. The rotating member is disposed on the outside of the case in such a way as to be rotatable. The rotating member includes (a) a shielding part which shields a radio wave and (b) a penetration part which allows penetration of a radio wave. A positional relationship between (a) the antenna and (b) the shielding part and the penetration part is changed by rotation of the rotating member so that the radio wave sensitivity of the antenna is adjusted.

A physical quantity detecting is capable of easily adjusting sensitivity and an offset of a detected output without being increased in size. In a signal processor for driving a sensor element in which fixed electrodes are disposed on both sides of a movable electrode displaced in response to acceleration, a signal generator generates PWM signals PA and PB in which an invalid control period during which the fixed electrodes are both deenergized only during a period corresponding to data M3 stored in a memory, is, at a predetermined ratio, inserted into a valid control period during which the fixed electrodes are alternately energized and their energization ratio is controlled so that the movable electrode is placed in position. Since the sensitivity of the sensor element to the acceleration changes according to the length of the invalid control period which does not contribute to control of the position of the movable electrode, its sensitivity can be easily adjusted by simply changing the value set in the memory.

The Resettable Latching MEMS Shock Sensor provides the capability of recording external shock extremes without consuming electrical power. The device incorporates a shock sensitive suspended proof mass, spring-loaded contacts, latches, and actuators for device reset. The device can be designed, hardwired, or programmed to trigger at various shock levels. The device can be fabricated in a simple micromachining process that allows its size to be miniaturized for embedded and portable applications. During operation, the device consumes no quiescent power. The device can be configured to close a circuit, switch an interrupt signal, or switch some other electrical trigger signal between devices at the time of a shock extreme being reached, or it can be configured to latch and be polled at some time after the shock limit has occurred.

The invention provides a flexible fingertip pressure sensor and a manufacturing method thereof. The sensor body is an intermediate elastomer of which the material is human body silica gel. The sensor body is internally provided with cylindrical holes. Liquid conductive metal solution is arranged in all the cylindrical holes. The cylindrical holes are regularly arranged into an array, and the first and the last cylindrical holes arranged in the first row are respectively provided with a lead port A and a lead port B. A lead A is led out of the lead port A, and a lead B is led out of the lead port B. The flexible fingertip pressure sensor is high in flexibility so that damage to the sensor caused by excessive force can be avoided; damage to the sensor caused by human sweat can be avoided and the protection performance of the sensor can be enhanced; the service life of the sensor can be enhanced; and the manufacturing method is simple and convenient, and the measuring range and the flexibility of the sensor can be adjusted by adjusting the size of a metal wire and the thickness of the intermediate elastomer.

The invention provides a carbon aerogel and a preparation method thereof, and a pressure sensor, and belongs to the field of researches on nanometer materials. According to the invention, the carbon aerogel formed from amorphous carbon and graphene through a mud brick structure and having omnidirectional compressible super-elasticity, and the preparation method thereof are provided; and the preparation method comprises: dispersing a saccharide-based additive and graphene oxide into a solvent to form a graphene oxide and additive mixed dispersing solution, drying the mixed solution to obtain anadditive-containing graphene oxide aerogel, and carrying out high-temperature heat treatment on the additive-containing graphene oxide aerogel under the protection of an inert gas to obtain the carbon aerogel, wherein the obtained carbon aerogel has the omnidirectional compressible super-elasticity. The present invention further relates to a tactile and pressure sensor based on the aerogel.

One reading sensor is used to read identification mark information, to decide whether a product is genuine.

Identification marks each having sensitivity adjustment for the reading sensor and specific mark information are printed on a sheet of release coated paper. The sensitivity adjustment for the reading sensor is performed by utilizing information on a density acquired by reading the identification mark. By combining pieces of density information on a plurality of marks that constitutes the identification mark, mark information is generated. This mark information is checked against saved mark information. In this case, by utilizing the identification mark in which the plurality of identical marks are sequentially shifted in a traveling direction, even a reading sensor constituted of a single light-emitting element and a single photoreceptor element can acquire the mark information on the identification marks. The read mark information and the mark information contained in barcode information are checked against each other and, if they agree, it is decided that the product is genuine and a result of the decision is displayed.

An optical fiber based polymer core sensor includes an optical fiber having a core and an end having a cured polymer core affixed to the core of the optical fiber. The cured polymer core extends outward from the end of the optical fiber and has a diameter approximately equal to the core of the optical fiber. Note the cured polymer core can be substantially cylindrical, tapered or geometrically shaped. The optical fiber based polymer core sensor can be used to measure a temperature, measure a strain, measure a distance, measure a refractive index, detect or measure an analyte, detect a toxin, detect a biological agent, monitor a chemical process, or a combination thereof

The capacitive stylus includes a pen tube, an upper skeleton structure, a lower skeleton structure, a pen cover, a refill, a refill holder, a trigger element, a spring, a control circuit board, a pressure sensing element and an adjusting element. The pen cover is connected with the pen tube by the upper skeleton structure and the lower skeleton structure. The trigger element is inserted in another end of the refill holder. The pressure sensing element is electrically connected with the control circuit board and disposed in accordance with the trigger element. When the refill and the refill holder press the spring so that the trigger element contacts the pressure sensing element, the pressure sensing element detects the pressure force against the refill. The adjusting element is configured to adjust the gap between the pressure sensing element and the trigger element.

A sensor system for receiving an input signal and applying a digital control signal to adjust an output sensitivity of a triggering signal within the sensor system. The input signal includes a bias DC and a fluctuation bias voltage. The sensor system includes a first voltage contact, a normalized voltage contact, a normalized circuit and a comparison circuit. The first voltage contact provides a first comparison voltage based on the digital control signal, wherein the first comparison voltage defines a standby voltage region. The normalized voltage contact provides a reference voltage based on the digital control signal, wherein the reference voltage is located within the standby voltage region. When the fluctuation bias voltage is located outside of the standby voltage region, the sensor system outputs a triggering signal so as to adjust the digital control signal.