281results about How to "High response frequency" patented technology

A thin film field effect transistor is disclosed that includes a gate electrode, a gate insulator film the on gate electrode, and a first organic electronic material film containing a first organic electronic material on the gate insulator film. A source electrode and a drain electrode are spaced apart from each other on the first organic electronic material film. The first organic electronic material film includes a portion between the source electrode and the drain electrode that is in contact with the gate insulator film. This portion provides a current path. The current is controlled by the potential of the gate electrode. There is a second organic electronic material film that is in contact with the surface of first organic electronic material film opposite to the portion that provides the current path. The second organic electronic material film contains a second organic electronic material and an electron acceptor or an electron donor. The thin film field effect transistor facilitates accumulating electric charges in the channel on the gate insulator film and realizing a high response frequency.

The invention relates to an embedded satellite laser ranging control system, and solves problems that the satellite laser ranging control technology implemented through a main control computer is complex in ranging method, is low response speed and causes the data loss. A telescope tracking controller reads a current observation moment, calculates the azimuth and height position at the current moment through orbit prediction interpolating of an observation station, and outputs the azimuth and height position to a servo system of a motor. A distance gate controller outputs an igniting signal of a laser according to a distance measuring frequency, locks a main wave signal, and calculates the moment when a distance gate signal corresponding to a main wave is generated. A gate control signal is outputted through the distance gate controller. A laser beam direction controller recognizes a light beam image, obtains a light peak position, calculates the deviation between the light peak point and the center of a receiving visual field, and corrects the direction deviation of a laser beam through a control algorithm. The system can meet the demands of higher-repetition-frequency laser ranging through employing an FPGA+DSP heterogeneous processor configuration, and facilitates the upgrading of the whole ranging system.

The invention discloses a thermocouple with micron scale or nanometer scale tip curvature radius and a manufacturing method thereof, and relates to a micron/nano thermocouple manufacturing method which can quickly respond to temperature variation in a tiny area and employs an electrochemical process for corrosion and a vacuum deposition technique to process the thermocouple with the tip curvature radius ranging from tens of microns to a plurality of nanometers. The thermocouple is composed of three parts, a metal needle point (11) with the micron scale or nanometer scale tip curvature radius is taken as a substrate, an insulating layer (12) is wrapped outside the substrate, the tip of the metal needle point (11) is exposed, and a layer of metal film (13) is arranged on the tip of the insulating layer (12) and the exposed metal needle point (11).

The invention discloses a non-contact type overvoltage sensor based on the electro-optic effect. The non-contact type overvoltage sensor comprises a non-contact sensing unit and an electro-optic sensing unit, wherein the non-contact sensing unit comprises an induction metal plate and a low-voltage arm module, the induction metal plate is used for being arranged below an aerial power transmission line, the low-voltage arm module is arranged between the induction metal plate and the ground, the low-voltage arm module is composed of a capacitor C2 and a peripheral circuit of the capacitor C2, one end of the capacitor C2 of the low-voltage arm module is electrically connected with the induction metal plate, the other end of the capacitor C2 is grounded, and a voltage signal output end between the capacitor C2 and the induction metal plate is electrically connected with a signal input end of the electro-optic sensing unit. The non-contact type overvoltage sensor based on the electro-optic effect is simple in structure, small in size, high in stability, and convenient to install, popularize and apply, and facilitates remote control; mutual conversion between optical signals and electrical signals is achieved through the electro-optic effect, long-distance signal transmission is achieved through optical fibers, and compared with a traditional photoelectric sensor, the non-contact type overvoltage sensor based on the electro-optic effect has the advantages that the size is smaller, the response efficiency is higher, and the sensor is not influenced by an electromagnetic field.

The invention discloses a dual-axis anti-shake camera module. The dual-axis anti-shake camera module comprises a deflection structure combination, a camera module and a stable control combination; thedeflection structure combination comprises a casing, an upper elastic support body, a lower elastic support body, coils and permanent magnets; the camera module is embedded in the upper elastic support body and the lower elastic support body, and suspends in the casing; the coils are mounted on an outer wall of the camera module; the permanent magnets are disposed on the inner wall of the outer casing corresponding to the coils; and the bottom of the camera module is connected with the stable control combination. The invention also discloses a control method for a dual-axis anti-shake cameramodule, which uses an inertial sensor to sense the angular velocity of biaxial motion of an image sensor, obtains a driving output by running a feedback control algorithm, drives the coils to drive the image sensor to deflect, captures image data information, and performs data processing and output. The invention has the advantages of compact structure, small appearance, low cost, firmness and reliability, stable image performance, no image loss, and is suitable for motion photography.

The invention discloses a current measurement device, which is used for measuring current in a powered-on lead wire. The current measurement device comprises a plurality of measurement units; each of the measurement units comprises a first sensor and a second sensor, wherein the first sensor is arranged along a tangent direction parallel to a magnetic field around the powered-on lead wire and used for measuring a current value within a low measurement range, and the second sensor is arranged in a manner of forming an angle with the tangent direction of the magnetic field around the powered-onlead wire and used for measuring a current value within a high measurement range; and the first sensor and the second sensor are located in the same plane vertical to a straight line where the powered-on lead wire is placed and connected with a sensor special application specific integrated circuit (ASIC) chip. By using the advantages that a triple modular redundancy (TMR) sensor is high in sensitivity and a hall sensor is wide in linear measurement range or measuring a component of the magnetic field around the powered-on lead wire by using the inclined TMR sensor, the current measurement device is high in sensitivity and wide in linear measurement range, and has the advantages of high temperature characteristic and response frequency, low power consumption and small volume.

The invention discloses an NP-type CMOS avalanche photodiode with a deep N-trap. The NP-type CMOS avalanche photodiode comprises a P-type substrate, an N-trap layer and an avalanche area. The N-trap layer and the avalanche area are arranged on the P-type substrate, the avalanche area is arranged between the P-type substrate and the N-trap layer to form a PN junction, a light absorbing layer is further arranged between the P-type substrate and the avalanche area, the light absorbing layer is the deep N-trap arranged on the P-type substrate, and the dosage concentration of the deep N-trap is larger than that of the P-type substrate. By means of the NP-type CMOS avalanche photodiode, the rate, the frequency response and bandwidth of avalanche photodiode devices are improved.

The invention discloses a high-fidelity transistor audio power amplifier which mainly comprises a prime amplifier and a post amplifier. An input port of the prime amplifier is connected with an audio input signal input by an external audio input device, the output port of the post amplifier is connected with an external audio output device, and the output port of the prime amplifier is connected with the input port of the post amplifier through a resistor. The post amplifier mainly comprises a common-emitter common-base differential input stage circuit, a common-emitter common-base principal voltage amplification stage circuit, a UBE multiplying and temperature protection circuit, an improved three-level Darlington push-pull output stage circuit, an alternative circuit / direct current negative feedback circuit, an active servo circuit, a voltage-stabling and filter circuit, a constant flow source circuit, an image constant flow source, two RC resistor-capacitor filter circuits, four capacitor filter circuits, a horn protection circuit and a post power circuit, wherein the power circuit supplies electricity to the common-emitter common-base differential input stage circuit, the common-emitter common-base principal voltage amplification stage circuit, the UBE multiplying and temperature protection circuit, the improved three-level Darlington push-pull output stage circuit, the alternative circuit/direct current negative feedback circuit, the active servo circuit, the voltage-stabling and filter circuit, the constant flow source circuit, the image constant flow source, the two RC resistor-capacitor filter circuits, the four capacitor filter circuits and the horn protection circuit. The high-fidelity transistor audio power amplifier achieves the conditions that a circuit is direct-current and wide-band, and can effectively improve listening feelings.

The invention discloses a double heterojunction ultraviolet detector, wherein a positive polarization charge is formed on the upper surface of the GaN absorption layer and a negative polarization charge is formed on the lower surface; Under the action of the polarized charges, a two-dimensional hole gas 2DHG as a transport channel for photogenerated holes is formed between the interface of the AlNbuffer layer and the GaN absorption layer, A two-dimensional electron gas 2DEG is formed between the interface of the GaN absorption layer and the AlGaN barrier layer as a transport channel for photogenerated electrons, and the working mode of the detector is that light is incident from the upper surface of the Schottky contact layer. The invention adopts AlGaN/GaN/AlN double heterojunction to replace the traditional AlGaN/GaN single heterojunction, so that the photogenerated holes can be transported quickly through the 2DHG channel, thereby eliminating the signal tail phenomenon caused by the slow migration speed of the photogenerated holes in the single channel structure. The quantum efficiency and response frequency of the device is further improved by the efficient collection of 2DHG.Due to the existence of two-channel polarized charge, it is easier to form vertical electric field distribution in GaN absorption region.

The present invention discloses a cable fault detection testing system and a working method thereof. The system comprises a microprocessor, DDS signal generators 1 and 2 which generate two paths of rectangular wave signals with consistent frequency and amplitude, adjustable inductors 1 and 2 which are connected between the DDS 1 and 2 and a detected cable in series, adjustable standard capacitors which are connected between current transformers 1 and 2 and a same ground end in series, a peak detectors 1 and 2 which are respectively connected to the current transformers 1 and 2 in series, a multiplier which calculates the correlation of the output signals of the detectors 1 and 2, and an analog to digital converter which carries out analog to digital conversion on a multiplier output voltage signal and then sends the signal into the microprocessor. Compared with the prior art, based on the two paths of symmetrical rectangular wave signals, the effective detection of a cable fault can be realized, a test signal waveform quality requirement is low, the signal sampling rate is low, the system structure is simple, the realization is easy, and the cost is low.

The invention discloses a compensated single-trailing-arm hydraulic driving hanging system for an engineering vehicle. One end of a hanging arm (4) of the hanging system is connected with a wheel edge driving system (6), the other end of the hanging arm (4) is connected with a compensation slide block (2) of a lateral displacement compensation mechanism (11), the compensation slide block (2) and a compensation hydraulic cylinder (1) are mutually connected, the compensation hydraulic cylinder (1) is connected with a whole body hinge, the middle part of the hanging arm (4) is connected with a hanging hydraulic cylinder (5), and the hanging hydraulic cylinder (5) is connected with the vehicle body hinge. The compensation hydraulic cylinder (1) and the hanging hydraulic cylinder (5) are connected with a hydraulic control valve block (9) through a pipeline, and the hydraulic control valve block (9) is connected with a constant-pressure hydraulic oil source (8) through a pipeline. Two hydraulic cylinders are used for driving one hanging arm, a controller is used for controlling the two hydraulic cylinders in real time according to the ground condition or the artificially input parameters, and a hanging wheel shaft moves according to specified requirements. The compensated single-trailing-arm hydraulic driving hanging system has the advantages that the occupied space is small, the regulation quantity of the gap from an underpan to the ground is great, and the like.

The invention discloses a transparent electrode grid-control transverse PIN blue and purple photo-detector and a method for manufacturing the same. The photo-detector comprises a P (positive)-type substrate. N (negative) wells and a deep N well are isolated from one another to form a reversed P well in the P-type substrate, an N<+> zone and a P<+> zone are arranged in the reversed P well, a grid oxide layer, a transparent conducting thin film and a grid electrode G sequentially cover the surface, which is positioned between the N<+> zone and the P<+> zone, of the reversed P well, an anode A is arranged on the N<+> zone, and a cathode K is arranged on the P<+> zone. The method for manufacturing the transparent electrode grid-control transverse PIN blue and purple photo-detector includes isolating the N wells and the deep N well from one another to form the reversed P well on the P-type substrate; forming the N<+> zone and the P<+> zone on two sides of the reversed P well and respectively forming the anode A and the cathode K; sequentially manufacturing the grid oxide layer, the transparent conducting thin film and the grid electrode G on the upper surface of the reversed P well. The transparent electrode grid-control transverse PIN blue and purple photo-detector and the method have the advantages that the problem of conflict between the quantum efficiency and frequency response of existing photo-detectors can be effectively solved, and the transparent electrode grid-control transverse PIN blue and purple photo-detector is low in dark current, high in quantum efficiency, rapid in frequency response, big in input impedance and favorable for integration.

The invention discloses a pipe monitoring system and monitoring method based on microstructure optical fiber distributive sensing. The system comprises a distributive sound wave sensing subsystem, a prewarning identification subsystem, and microstructure optical fibers laid on pipes to be monitored; the distributive sound wave sensing subsystem is used for generating signal light, injecting the signal light into the microstructure optical fibers, and detecting reflecting signal light to obtain phase information and position information of the reflecting signal light through demodulation; the prewarning identification subsystem is used for judging the pipe health conditions according to the phase information and further identifying pipe abnormal modes or prewarning the pipe corrosion conditions; and the microstructure optical fibers are used for transmitting the signal light and generating the reflecting signal light with pipe sound wave or vibration information. The system can synchronously realize monitoring and prewarning, is high in monitoring sensitivity and positioning precision, and meanwhile, is high in response frequency to abnormal events.

The invention discloses a working roll bending device of a plate band rolling mill. The device is fixedly arranged on a rolling mill stand, and roll bending devices are arranged on two end parts of an upper working roll and a lower working roll so as to carry out supporting, balancing and roll bending control on the upper working roll and the lower working roll to improve the convexity of a loaded roll gap between the upper working roll and the lower working roll and control the plate shape. The roll bending device comprises a memorial archway, upper roll bending devices and lower roll bending devices, wherein the memorial archway is a framework body, and upright posts at the left side and the right side of the memorial archway are respectively inwards and convexly provided with a waist bump; the upper roll bending devices can be slidably arranged in the memorial archway, positioned above the waist bump and assembled at two ends of the upper working roll; and the lower roll bending devices can be slidably arranged in the memorial archway, positioned below the upper roll bending device and assembled at two ends of the lower working roll. The working roll bending device of the plate band rolling mill can meet the working requirement of a large large-openness plate band rolling mill and has the advantages of reliable rolling quality and long service life.

The invention discloses an electromagnetic drive adhesive dispensing valve comprising a flexible amplification arm. The electromagnetic drive adhesive dispensing valve comprising the flexible amplification arm comprises an adhesive cavity (16), a nozzle (18) and an ejecting needle (13), the adhesive cavity (16), the nozzle (18) and the ejecting needle (13) are installed at one end of a support (1), one end of the flexible amplification arm (3) is installed at the other end of the support (1), the other end of the flexible amplification arm (3) is in transmission connection with the ejecting needle (13), a supporting horizontal plate (9) is arranged on the support (1), a regulating screw (8) is arranged on the supporting horizontal plate (9), a compression spring (11) is arranged between the ejecting needle (13) and the regulating screw (8), an armature (12) is installed on the flexible amplification arm (3), and an electric magnet acting on the armature (12) is installed on the support (1). The electromagnetic drive adhesive dispensing valve comprising the flexible amplification arm is rapid in response, simple in structure, large in sprayable adhesive viscosity and adjustable in spraying speed and adhesive spraying amount.