66results about How to "Boost electrical signal" patented technology

A switch chassis includes a plane having pass-through vias. An array of connector pairs is provided. A connector pair includes a first multi-path connector on first side of the plane and a second multi-path connector on the second side of the plane interconnected through the pass-through vias in the plane. Fabric cards can be connected to respective columns of first connectors and line cards can be connected respective rows of second connectors of the connector pairs to orient the fabric and lines cards orthogonally with respect to each other.

The invention discloses a cerebral palsy child rehabilitation training method based on a Kinect sensor. The method comprises the following steps: S1, acquiring skeleton point data of a child; S2, carrying out limb movement training and judging the tilting angle and uplifting angle of skeleton points of the child, wherein after the child conducts a movement, the movement of the child is captured, and the tilting angle and uplifting angle of the joint points of the head, the upper limbs and the lower limbs are judged; S3, carrying out robust interactive processing on the movement of the child; S4, connecting a game engine and sending child skeleton data obtained after robust interactive processing in the step S3 to the game engine; S5, feeding back the movement of the child in a voice mode to remind the child of non-standard movements and encourage the child to conduct standard movements; S6, estimating the progress of rehabilitation training of the child. According to the method, the movement behavior characteristics of the child in training are acquired based on microsoft Kinect, so that the cardiovascular endurance, muscular endurance, muscular force, balance and flexibility of the child are comprehensively developed.

Embodiments disclosed herein include receiver optical assemblies (ROAs) having a photo-detector remotely located from a differential transimpedance amplifier (TIA). Related components, circuits, and methods are also disclosed. By providing the photo-detector remotely located from a TIA, additional costs associated with design constraints of providing the photo-detector intimate with a TIA may be avoided, thereby reducing cost of the ROA. In this regard as a non-limiting example, the ROAs according to the embodiments disclosed herein allow shorter haul active optical cable applications for use in consumer applications from a cost standpoint with the added benefits of increased bandwidth and low noise performance of optical fiber. In this regard, the ROAs disclosed herein provide higher input impedance differential TIA circuits and transmission circuits inhibiting or reducing ringing effects and maintain a sufficiently low resistance-capacitance (RC) time constant for differential TIA circuit to allow for higher bandwidth operation of the ROA.

The invention provides a preparation method of an electrochemical aptamer sensor for detecting aflatoxin B1. The preparation method comprises the following steps of (1) dropwise adding mesoporous carbon onto a work electrode; (2) performing potentiostatic gold nanoparticle deposition for modifying CMK/GCE; (3) dropwise adding an AFB1 aptamer modified with sulfydryl at one end onto an AuNPs/CMK/GCEelectrode; (4) immersing the Apt/AuNPs/CMK/GCE into an MB (Methylene Blue) solution, so that the MB is adsorbed on an aptamer chain to obtain an MB-Apt/AuNPs/CMK/GCE electrode; and (5) detecting thereduction peak current value. The electrochemical aptamer sensor for detecting aflatoxin B1 can achieve the goal of quantitatively detecting a target object; the characteristics of high speed and operation simplicity are realized; and the defects of operation complexity and long detection period of a large-scale detecting instrument are overcome.

A scalable and compact computer system of three-dimensional subsystems each having capacitive couplers on its external surfaces for transmitting and receiving electrical signals to and from adjacent subsystems. Each surface having an electrically non-conducting substrate, one or more electrically conducting pads on the substrate, and electrical leads for coupling the pads to the subsystem's circuits. Two adjacent pads, each from a different subsystem, form a capacitive coupler to carry the signals between the subsystems. The pads are covered by a low-loss dielectric material having a large dielectric constant for improved signal transmission. A differential signal may be supported using two capacitive couplers to respectively carry the positive and negative signals of the differential signal. The subsystems might be replaced or left in place when they failed. Additional subsystems might be added to the system to expand its capacity.

This invention relates to a liquid concentration test method and a device including the following steps: 1, putting a reflection mirror in the solution with unknown concentration, 2, plugging the emit fiber in the liquid in an acute angle with the reflection mirror to let the end face of the fiber parallel to the mirror, 3, designing a receiving fiber on the beam reflection direction of the emit fiber, 4, injecting a defined strength beam by emitting the fiber, 5, collecting reflection beams by receiving fibers, 6, designing a photoelectric tube at the outlet of the receiving fiber to compute the liquid concentration with the strong or weak signals of the conversion of the tube.

The invention discloses a MEMS piezoelectric ultrasonic transducer. A piezoelectric ultrasonic transducer (11) is formed on a substrate layer (1); a Helmholtz resonant cavity (16) is formed in the substrate layer (1); the resonant frequency of the Helmholtz resonant cavity (16) is consistent with the resonant frequency of the piezoelectric ultrasonic transducer (11); the Helmholtz resonant cavity(16) comprises a first cavity (6) whose height is higher than the maximum vibration amplitude of the piezoelectric ultrasonic transducer (11); the middle part of the first cavity (6) is sunk to form asecond cavity (9); and the first cavity (6) communicates with the external through a through hole (7) in the piezoelectric ultrasonic transducer (11). The volume of the Helmholtz resonant cavity is obviously reduced; and the resonant frequency of the Helmholtz resonant cavity is improved. The resonant frequency of the transducer is matched with the resonant frequency of the Helmholtz resonant cavity to finally improve the resonant frequency of the MEMS piezoelectric ultrasonic transducer.

The present invention discloses a silk-screen printing electrode sensor preparation method based on ionic liquid-multi-wall carbon nano-tube modification, and belongs to the technical field of biological sensors. According to the method, an ionic liquid-multi-wall carbon nano-tube nanometer material is prepared and then coats the surface of a silk-screen printing carbon electrode in a dropwise manner, and then acetylcholine esterase coats the surface of the ionic liquid-multi-wall carbon nano-tube nanometer material modified silk-screen printing work electrode in a dropwise manner so as to prepare the acetylcholine esterase biological sensor for detecting organic phosphorus and carbamate pesticides. According to the present invention, the prepared sensor has characteristics of simple process, easy operation, low cost, high detection sensitivity, strong electrical signal and simple electrode pretreatment, and is suitable for detection of pesticide residues, wherein the detection limit is 0.05 [mu]g/L.

The invention discloses a ZnSe nano-photoelectric detector and a preparation method thereof, an insulating substrate, a photosensitive layer and an electrode are sequentially arranged on a structural layer of the detector from bottom to top, and the ZnSe nano-photoelectric detector is characterized in that the photosensitive layer comprises n type doped ZnSe nanowires. The preparation method comprises the following steps: adopting the chemical vapor deposition method for synthesizing and preparing the n type doped ZnSe nanowires, realizing n type doping through in-situ doping during the synthesis process, utilizing the technologies including photoetching, electron bean and pulsed laser deposition for preparing source and drain electrodes and further preparing the ZnSe nano-photoelectric detector. The n type doped ZnSe nanowires are adopted in the photosensitive layer in the detector, thereby effectively enhancing electrical signals of the nano-photoelectric detector and improving the switching ratio; furthermore, the preparation method is simple, and the ZnSe nanowires can be arranged in parallel, thereby increasing the photosensitive area and further improving the electrical signals.

An electrophysiology catheter (100) includes a catheter distal portion (110) on which a force sensor (200) is arranged. The force sensor (200) includes an elastic tube (210) and strain gauges (220). The elastic tube (210) has a hollow portion in its wall, and the strain gauges (220) are disposed external to the hollow portion. Compared to the design with the strain gauges (220) overlapping the hollow portion, arranging them over solid portions of the elastic tube (210) allows the strain gauges (220) to collect more accurate electrical signals while suffering from less interference. This can result in a significant improvement in contact force measurement accuracy of the catheter distal portion (110).

The present invention disclosed a metal nanoparticles/single-walled carbon nanotube (MNP/SWCNT) hybrid based chemiresistive biosensor for the quantitative detection of human cardiac biomarkers troponin I (cTnI) and myoglobin (Mb). The highly specific cardiac-antibody, anti-cTnI (Ab-cTnI) or anti-Mb (Ab-Mb), was covalently immobilized to site-specific carboxyl groups on MNP anchored over SWCNT device. The biosensor device was characterized by the source-drain current-voltage measurements. The device performance was investigated with a change in conductance in SWCNT channel upon exposure to cTnI in human serum. MNP provided large surface area for high protein loading and improved electrical signal by inducing charge density in SWCNT, resulting in low level detection of cTnI and Mb with high sensitivity.

The invention discloses a complementary metal oxide semiconductor (CMOS) image sensor, which comprises an optical receiving array, a metal interconnection structure, a color filter array and a micro-lens array, wherein the optical receiving array serves as a photoelectric conversion device; the metal interconnection structure is arranged on the optical receiving array and comprises metal interconnection lines and a medium layer which is filled between the metal interconnection lines; the color filter array is arranged on the optical receiving array; the micro-lens array is arranged on the metal interconnection structure; the optical receiving array, the color filter array and the micro-lens array respectively comprise a plurality of units; the units of the color filter array are positioned in the medium layer of the metal interconnection structure and separated by the metal interconnection lines of the metal interconnection structure; and the units of the color filter array, the units of the optical receiving array and the units of the micro-lens array are respectively opposite to one another. Moreover, the invention also provides a manufacturing method of the CMOS image sensor. By adoption of the technical scheme provided by the invention, the problem of crosstalk of the CMOS image sensor can be solved.

Embodiments disclosed herein include receiver optical assemblies (ROAs) having a photo-detector remotely located from a differential transimpedance amplifier (TIA). Related components, circuits, and methods are also disclosed. By providing the photo-detector remotely located from a TIA, additional costs associated with design constraints of providing the photo-detector intimate with a TIA may be avoided, thereby reducing cost of the ROA. In this regard as a non-limiting example, the ROAs according to the embodiments disclosed herein allow shorter haul active optical cable applications for use in consumer applications from a cost standpoint with the added benefits of increased bandwidth and low noise performance of optical fiber. In this regard, the ROAs disclosed herein provide higher input impedance differential TIA circuits and transmission circuits inhibiting or reducing ringing effects and maintain a sufficiently low resistance-capacitance (RC) time constant for differential TIA circuit to allow for higher bandwidth operation of the ROA.

A stationary position detection circuit and a motor drive circuit capable of more properly detecting the rotor position are disclosed. The stationary position detection circuit supplies an alternating current to each phase load of the motor. The time during which the current flows in a first direction and the time during which the current flows in a second direction opposite to the first direction are converted into electrical signals and amplified. In accordance with the value of the electrical signals, the position of the motor rotor in stationary mode is determined. The use of the alternating current, unlike the kickback voltage, makes it possible to improve the detection accuracy by amplifying the electrical signals with an increased number of alternations. An increased number of alternations can amplify the electrical signals without increasing the value of the alternating current, and therefore, unlike in the case of the kickback voltage, the alternating current of a large value is not required. As a result, the alternating current can be reduced to a small value and the vibration can be suppressed.

A microprocessor-operated, networked device that uses sensors in, on and near the toilet to detects toilet leaks and overflows of the toilet tank or bowl, then reports these errant conditions with a visual or audible indicator in addition to sending a message via a network (if available) to a computer system that may collate this data with that from other toilets and other sources and subsequently determine further action such as shutting off water or calling a technician. The present invention can be integral to a toilet or removably attached to an existing toilet without this technology.

The invention discloses a preparation method and an application of a sensor based on a screen-printed carbon electrode and belongs to the technical field of biological sensors. The method comprises steps as follows: a dicyclohexyl phthalate/ multiwalled carbon nanotube nano material is prepared and dripped on the surface of the screen-printed carbon electrode layer by layer, then acetylcholine esterase is dripped on the screen-printed work electrode surface modified with a dicyclohexyl phthalate/multiwalled carbon nanotube, and the acetylcholine esterase biological sensor for detecting organophosphorus and carbamate pesticides is prepared. The prepared sensor has the characteristics of simple work procedure, convenience in operation, low cost, high detection sensitivity, strong electric signal and simplicity in electrode pre-treatment and is applied to detection of pesticide residues, and the detection limit reaches 0.05 mu g/L.

The invention discloses a heat flux sensor. The heat flux sensor comprises electrodes and a measuring head, wherein the electrodes and the measuring head are integrally sintered, a thermopile is directly deposited on a measuring face of the measuring head, and the two ends of the thermopile are deposited on end faces of the electrodes respectively; the thermopile comprises multiple thermocouple units connected in series, and each thermocouple unit comprises a cold node and a hot node which are connected with each other; a thermal resistance layer is deposited on the measuring face; one part ofeach cold node and one part of each hot node are both arranged between the thermal resistance layer and the measuring face; and protective films are deposited on the thermopile and the thermal resistance layer respectively. The heat flux sensor has the advantages of being high in response speed, high in sensitivity, simple in structure and the like. The invention further discloses a preparation method. The preparation method comprises the steps that S01, the electrodes, ceramic and glass powder are sintered to prepare an integrated structure; S02, film coating is directly performed on the measuring face through an ion beam sputtering process to form the thermopile and the thermal resistance layer; and S03, the protective films are deposited. The preparation method has the advantages of being simple in process and the like.

The invention discloses a liquid level data detection device and method. The device comprises an ultrasonic sensor, a controller and an ultrasonic wave-focusing cover; the ultrasonic wave-focusing cover comprises a curved surface; the controller is connected with the ultrasonic sensor; a concave surface of the curved surface is opposite to the ultrasonic sensor, and the concave surface of the curved surface can emit the ultrasonic wave emitted by the ultrasonic sensor in parallel along a first reflecting beam direction, and the ultrasonic wave entering the concave surface along the first reflecting beam direction can be focused to the ultrasonic sensor. The technical problem that the liquid level data detected in the prior art is inaccurate since the ultrasonic second reflecting wave energy value in the prior art is small is solved, and a technical effect of improving the accuracy of acquiring the accurate liquid level data at the to-be-detected water area is reached.

The invention relates to a GII.4 norovirus detection material, a synthesis method thereof, and a GII.4 norovirus detection method. The material comprises:Fe3O4@COF(TpDA) or AuNPs@Fe3O4@COF(TpDA) or WP5@AuNPs@Fe3O4@COF(TpDA), wherein the three materials are synthesized in sequence. an analyte which is a water sample, a food sample, a vomitus or an excrement sample; and an electrochemical immunosensor manufactured using the method of the invention. The linear detection range of the sensor prepared by the invention is 2.51 copies/mL to 105.4 copies/mL, and the lowest detection limit is 0.84 copy/mL.

The invention discloses an MEMS ultrasonic positioning sensor. The MEMS ultrasonic positioning sensor comprises an upper layer substrate (3), a Helmholtz resonant cavity (2) formed in the upper layersubstrate (3), a piezoelectric ultrasonic emission unit (9) located on the upper layer substrate (3), an ultrasonic receiving unit (1) located at the bottom of the Helmholtz resonant cavity (2), wherein at least one through hole communicating with the Helmholtz resonant cavity (2) is formed in the piezoelectric ultrasonic emission unit (9), the resonant frequency of the Helmholtz resonant cavity (2) is the same as that of the piezoelectric ultrasonic emission unit (9), and the resonant frequency of the ultrasonic receiving unit (1) is greater than or equal to that of the piezoelectric ultrasonic emission unit (9). The MEMS ultrasonic positioning sensor can improve the energy conversion efficiency of the sensor and avoid crosstalk of the sensor.

A circuit module for a silicon condenser microphone of the present disclosure includes a transducer, a charge pump, an isolator, a first amplifier, a second amplifier, a reaction circuit, a first bias circuit, and a second bias circuit. The charge pump electrically connects to an input port of the transducer, and an output port of the transducer electrically connects to an input port of the first amplifier via the isolator. An output port of the first amplifier electrically connects to an input port of the second amplifier. The reaction circuit is arranged between the output port of the first amplifier and the input port of the transducer. The isolator isolates the direct-current components of the first electrical signal, and therefore, the oscillations of the direct-current components will not affect the performance of the first amplifier.