14results about How to "Improve sensing sensitivity" patented technology

The invention provides a preparation method of a high-sensitivity nanofiber composite slub core-spun yarn strain sensor, and belongs to the field of wearable flexible sensors. Comprising the following steps: S1, dissolving polyurethane in a solvent to prepare a spinning solution, preparing a nanofiber / traction filament composite yarn through an electrically-assisted core spinning technology, and endowing traction filaments with deformation by using a stretching device; s2, the composite yarn in the deformation state is placed in a conductive nanoparticle / polymer dilute solution to be soaked; s3, the impregnated composite yarn is impregnated in water, and a nanoparticle / polymer conductive layer is constructed on the surface of the composite yarn through non-solvent induced phase separation; s4, the stretching device is removed, heat treatment is conducted on the composite yarn, and the nanofiber composite slub core-spun yarn sensor is obtained. The sensor has a radial core-shell structure and an axial concave-convex structure, is high in sensitivity, has a stress detection limit as low as 0.01 N, and also has excellent mechanical properties.

A depth pixel of a time-of-flight (ToF) sensor includes a common photogate disposed in a central region of the depth pixel, a plurality of floating diffusion regions disposed in a peripheral region surrounding the central region, a plurality of demodulation transfer gates disposed in the peripheral region, and a plurality of overflow gates disposed in the peripheral region. The demodulation transfer gates transfer photocharge collected by the common photogate to the plurality of floating diffusion regions. The demodulation transfer gates are symmetric about each of a horizontal line and a vertical line passing through a center of the depth pixel and substantially perpendicular to each other. The overflow gates drain the photocharge collected by the common photogate and are symmetric about each of the horizontal line and the vertical line.

One or more embodiments of the invention provide a payment terminal and a payment method based on near field communication. The payment terminal can be used as an extension device of a merchant cashier device, and the payment information of the cashier device is sent to a payment terminal such as a smart phone of a consumer based on a near field communication mode, so that the payment terminal is triggered to complete payment according to the payment information. Besides, a part of the NFC antenna of the payment terminal is reused as a part of the shell of the payment terminal to be exposed outside, and the NFC antenna is connected with the rest of the shell of the payment terminal through the plastic connecting part to form the whole shell body of the payment terminal. The payment method is applied to the payment terminal, payment information sent by an external cashier device is sent to the payment terminal through a near field communication assembly of the payment terminal in an electromagnetic signal mode, and the payment terminal completes payment according to the payment information.

The utility model provides a hidden high-sensitivity capacitance key for teaching model acupoint positioning, which comprises a double-sided printed circuit board comprising a first board and a second board which are oppositely arranged, the first board is at least provided with an induction coil, an induction spring and an indicator light, and the second board is at least provided with an induction coil; the second board surface is at least provided with an integrated circuit, a sensitivity regulation and control circuit, an indicating lamp driving circuit and a power supply control circuit. Through the design that the induction coil is matched with the induction spring, the induction sensitivity of the capacitance key to the touch operation of a user outside the model is effectively improved; meanwhile, the capacitance keys are realized by adopting a double-sided printed circuit board design, so that the occupied space is effectively reduced on the basis of not influencing the complete function and the sensitivity of the capacitance keys, and a plurality of capacitance keys can be conveniently arranged in a narrow model; in addition, in combination with the design of the indicating lamp, more intuitive and clearer feedback is performed on the touch operation of the user at the correct position, and the use effect of the teaching model is improved.

This application discloses a host structure and a smartwatch. The host structure includes a housing, a display screen, and a bottom cover. A cavity is formed between the display screen and the bottom cover, and an NFC component, a circuit board, and a battery are housed within the cavity. The NFC component is attached to the inner surface of the display screen. The circuit board is located below the NFC component and has a multi-layered mesh-like hollow structure. The battery is partially embedded within the hollow structure, forming a three-dimensional interlocking layout. The bottom cover has an independently operable SIM card cover. This application arranges the NFC component close to the inner surface of the display screen, and the circuit board uses a multi-layered hollow structure to form a three-dimensional interlocking with the battery, significantly improving space utilization. The independent SIM card cover on the bottom cover maintains the device's airtightness and simplifies SIM card replacement.

The present application discloses a humidity-responsive CO2 separation material and its preparation and application. The preparation method comprises the following steps: dispersing cellulose in a good solvent to obtain a cellulose solution with uniform dispersion and abundant hydroxyl active sites; dripping a tertiary amine polymer solution into the cellulose solution, adding a cross-linking agent to carry out a Williamson etherification reaction, and then adding a quaternary ammonium salt compound aqueous solution to stir the reaction, and then heat-treating and rinsing to obtain modified cellulose; soaking the modified cellulose in a strong base and weak acid salt solution to carry out ion exchange, and then rinsing with alcohol and drying to obtain a humidity-responsive CO2 separation material; the present application uses renewable cellulose as a raw material carrier, and by optimizing the structural design, regulates the physical structure and surface chemical properties of the carrier, thereby achieving efficient adsorption of CO2 in the air and improving the sensing sensitivity to humidity (≤60%).

The present application relates to a temperature overload protection device for a photovoltaic power generation junction box, and belongs to the technical field of photovoltaic power generation. The temperature overload protection device includes: a protection unit, a junction unit and a thermal sensing unit, the junction unit and the thermal sensing unit are both arranged inside the protection unit, and the thermal sensing unit is electrically connected to the junction unit, a heat exchange unit is arranged on the outside of the protection unit, the heat exchange unit penetrates to the inside of the protection unit, and the heat exchange unit is connected to a cooling unit arranged inside the protection unit, the cooling unit is located on the peripheral side of the junction unit, so as to adjust the temperature of the peripheral side of the junction unit through the cooperation of the cooling unit and the heat exchange unit. The present application can maintain the accuracy of the temperature sensor inside the existing photovoltaic power generation junction box within a relatively high range, while extending the service life of the temperature sensor inside the photovoltaic power generation junction box.

The present invention provides a micro memory packaging structure, which includes a circuit substrate, a first chip, a second chip and a packaging colloid. The circuit substrate has a first surface, a second surface facing away from the first surface and a conductive pattern located on the second surface. The first chip is configured on the first surface. The first chip has a first active surface away from the first surface and a redistribution wiring layer located on the first active surface, and the redistribution wiring layer is electrically connected to the circuit substrate. The second chip is configured on the first active surface and is electrically connected to the redistribution wiring layer. The second chip has a second active surface facing the first active surface. The packaging colloid is configured on the first surface and covers the first chip and the second chip. A memory packaging structure with an antenna is also provided.

A display device is provided. The display device includes: a first display area including a plurality of first pixel areas; a second display area including a plurality of second pixel areas and a plurality of transmission areas; a plurality of pixels arranged in a matrix form in the first display area and the second display area; and a first signal line and a second signal line arranged to correspond to each pixel column of the plurality of pixels. In each pixel column, one of the first signal line and the second signal line may extend throughout the first display area and the second display area, and the remaining one of the first signal line and the second signal line may not be arranged in the second display area.

A display device includes a display panel, a support layer, a digitizer, a flexible circuit board, and a metal layer. The digitizer is disposed under the support layer having an insulating property. The flexible circuit board is connected to the digitizer. The metal layer is disposed under the digitizer and provided with an opening defined therethrough to correspond to the flexible circuit board.

The utility model provides an installation structure of a temperature and pressure sensor of a minimally invasive surgical instrument. Comprising a pilot assembly head of a minimally invasive surgical instrument, a temperature and pressure sensor and a protection tube, the temperature and pressure sensor is sleeved with the protection tube, at least one first induction hole is formed in the position, corresponding to the induction position of the temperature and pressure sensor, of the side wall of the protection tube, and glue is filled between the temperature and pressure sensor and the inner wall of the protection tube; the end of the pilot assembly head is provided with an assembly hole allowing the protection tube to be inserted therein, the side wall of the pilot assembly head is provided with a second induction hole communicated with the assembly hole, and the second induction hole of the pilot assembly head and the first induction hole of the protection tube jointly form an induction channel. According to the installation structure of the temperature and pressure sensor of the minimally invasive surgical instrument, the temperature and pressure sensor and the protection tube are of a pre-packaging structure, then the temperature and pressure sensor and the protection tube are installed in the pilot assembly head together, the installation structure enables the temperature and pressure sensor and glue to be installed after parameter calibration, and the overall procedure is simplified.

The invention discloses an electric sofa anti-pinch detection and protection method which comprises the following steps: taking the tail end of an electric sofa telescopic iron stand on an electric sofa iron stand as a sensing part to receive contact from a living body; the tail end of the electric sofa telescopic iron stand is connected with the multi-path capacitive sensing plate through a lead, and a received contact signal is detected, converted and fed back through the multi-path capacitive sensing plate; when the main control circuit board receives a retraction instruction from the remote controller, the main control circuit board needs to judge the position of the push rod motor in real time according to the current state when the push rod motor works; in the process that the main control circuit board drives the telescopic iron stand to retract, when a living body touches the tail end of the telescopic iron stand of the electric sofa, sensing chips of the multi-channel capacitive sensing board provide collected feedback information to the main control circuit board, and the main control circuit board executes corresponding stopping and unfolding actions according to the feedback information. And anti-pinch detection and protection in the retraction process of the electric sofa are realized.

The utility model discloses a current sensor and an electronic device, the current sensor comprises a conductor and a magnetic sensor, two ends of the conductor are respectively provided with an input interface and an output interface which are used for being communicated with an external device, and a notch located between the input interface and the output interface is formed on the conductor. Two bending parts with opposite bending directions are formed on the two sides of the notch, and a mounting port is formed between the two bending parts; the magnetic sensor is arranged in the installation opening in a penetrating mode, the two ends of the magnetic sensor are connected with the two bending parts respectively, the two sensing elements are arranged at the two opposite ends of the magnetic sensor respectively, and the two sensing elements correspond to the two resistors one to one. According to the utility model, the sensing elements and the corresponding resistors are arranged at the included angles, so that the magnetic induction lines can vertically or horizontally penetrate into the corresponding sensing elements, and the sensing elements can directly sense the magnetic induction lines instead of sensing through components of the magnetic induction lines, thereby further improving the sensitivity to a magnetic field.

This invention provides an oscillator circuit and a long-distance detection sensing device, including a push-pull amplifier circuit, an inductive resonant circuit, a rectifier protection circuit, and a signal adjustment circuit. The inductive resonant circuit generates an alternating magnetic field to produce an oscillation signal. The push-pull amplifier circuit includes a first transistor and a second transistor to amplify the oscillation signal. The rectifier protection circuit and the signal adjustment circuit are used to protect the circuit and adjust the oscillation signal, respectively. This circuit improves the sensing sensitivity to external metal, achieving long-distance detection and solving the problem of insufficient sensing distance in existing proximity switches.