Provided is an electromagnetic induction potentiometer adaptive for full-stroke detection, including a movable element configured to obtain an input for position change, a permanent magnet attached to the movable element, a magnetic induction sensor configured to sense positions of the permanent magnet and generate an initial potential signal, and an full-stroke adaptive output adjusting unit configured to collect the initial potential signal and adaptively adjust the initial potential signal to an actual potential signal corresponding to a full stroke of position changing of the movable element.

A graphene-containing composite material comprises components of a composite functional material with a double-conductive channel and a polymer matrix. The composite functional material with a double-conductive channel is sulfonated graphene surface grafted conductive polymer poly-3,4-(ethylenedioxythiophene). The composite functional material with a double-conductive channel and the graphene-containing composite material can be used for preparing a piezoresistance response material or an antistatic or electromagnetic shielding material and the like, and have excellent piezoresistance response, piezoresistance repeatability and electromagnetic shielding effect. The present invention is simple and easy to operate, can be used in large scale production, has excellent piezoresistance performance and very sensitive piezoresistance response, with the percolation threshold being only 0.5 wt %; not only the original performance of the polymer can be maintained, but also an unstable conductive network system can be formed, which facilitates the improvement of the sensitivity of the piezoresistance response.

A modular potentiometer includes a magnetic block slide unit including a slide and a magnetic block disposed on the slide; a magnetic field sensing unit parallel to the magnetic block slide unit and including at least one Hall device and a circuit board electrically connected to the at least one Hall device, wherein the circuit board is modularized so that portions thereof are connected in series; a signal processing unit electrically connected to the magnetic field sensing unit to receive a sensing signal from the magnetic field sensing unit and thereby calculate a distance traveled by the magnetic block. Hence, due to the aforesaid segmental design, the non-contact potentiometer is easy to manufacture, mount, demount, and carry, and its manufacturing cost is reduced by modularizaton.

Control of electrical conductivity is provided via electrically conductive magnetic domain walls between magnetic domains. The magnetic domains are identical except for their magnetic configuration. Altering a configuration of the magnetic domains (e.g., by thermal treatment, application of a magnetic field, etc.) can alter the electrical resistance of a device. Such devices can be used as non-volatile information storage devices or as sensors.

A modular potentiometer includes a magnetic block slide unit including a slide and a magnetic block disposed on the slide; a magnetic field sensing unit parallel to the magnetic block slide unit and including at least one Hall device and a circuit board electrically connected to the at least one Hall device, wherein the circuit board is modularized so that portions thereof are connected in series; a signal processing unit electrically connected to the magnetic field sensing unit to receive a sensing signal from the magnetic field sensing unit and thereby calculate a distance traveled by the magnetic block. Hence, due to the aforesaid segmental design, the non-contact potentiometer is easy to manufacture, mount, demount, and carry, and its manufacturing cost is reduced by modularizaton.

Provided is an electromagnetic induction potentiometer adaptive for full-stroke detection, including a movable element configured to obtain an input for position change, a permanent magnet attached to the movable element, a magnetic induction sensor configured to sense positions of the permanent magnet and generate an initial potential signal, and an full-stroke adaptive output adjusting unit configured to collect the initial potential signal and adaptively adjust the initial potential signal to an actual potential signal corresponding to a full stroke of position changing of the movable element.

A graphene-containing composite material comprises components of a composite functional material with a double-conductive channel and a polymer matrix. The composite functional material with a double-conductive channel is sulfonated graphene surface grafted conductive polymer poly-3,4-(ethylenedioxythiophene). The composite functional material with a double-conductive channel and the graphene-containing composite material can be used for preparing a piezoresistance response material or an antistatic or electromagnetic shielding material and the like, and have excellent piezoresistance response, piezoresistance repeatability and electromagnetic shielding effect. The present invention is simple and easy to operate, can be used in large scale production, has excellent piezoresistance performance and very sensitive piezoresistance response, with the percolation threshold being only 0.5 wt %; not only the original performance of the polymer can be maintained, but also an unstable conductive network system can be formed, which facilitates the improvement of the sensitivity of the piezoresistance response.

An embodiment of the present invention relates to a pressure sensor formed in a sheet type and including conductive fibers, nonconductive fibers, and piezoresistive fibers, which are woven together, wherein the pressure sensor includes a first electrode layer including the conductive fibers and the nonconductive fibers, a second electrode layer including the conductive fibers and the nonconductive fibers, and a piezoresistive layer including the piezoresistive fibers and disposed between the first electrode layer and the second electrode layer.

Embodiments of a force sensing resistor (FSR) are disclosed. The FSR has one or more external conductive layers, applied to at least part of the contact surface of the FSR, so that when a conductive probe presses the FSR, initial zero-force contact with the FSR can be detected immediately. The external conductive layer or layers may be rigid sheet metal, flexible sheet metal, metallic-coated polymer, conductive polymer, conductive elastomer, or other conductive material. A lead or trace may be electrically coupled to the external conductive layer or layers to allow for ease of coupling to a circuit or circuit board.

A power supply device includes an input port, an active-rectifier circuit, a surge-discharge circuit, a detection circuit, a rectification-control circuit, a protection-control circuit, and a drive circuit. The surge-discharge circuit is coupled between the input port and the active-rectifier circuit. The detection circuit outputs an output signal, normally a regular signal, to the protection-control circuit and, in response to detecting a surge signal from the surge-discharge circuit, changes the output signal to an activation signal. The protection-control circuit, in response to receiving the regular signal, outputs the control signal as an operation signal. The drive circuit then outputs a drive signal to the active-rectifier circuit according to the operation signal. The protection-control circuit, in response to receiving an activation signal, temporarily interrupts outputting the control signal as the operation signal. The drive circuit then stops outputting the drive signal.