39results about How to "Strong output signal" patented technology

The sensor includes following parts and structures: insulative inertial mass block in cube; four pieces of XO0 cutting type quartz wafer with electrode are jointed four walls of the inertial mass block; the inertial mass block and quartz wafers are instilled inside base frame composed of case body and case cover. Each insulative force transmission block is pasted on outside each quartz wafer. Pretension screw of withstanding each piece of force transmission block is arranged on four walls of the base frame. Through signal lead wire, one end of the case cover is connected to electrode, and the other end is connected to connector plug, which is connected to differential type charge amplifier. The sensor possesses high sensitivity, or, when outside force is smaller, output signal is still strong so as to reduce measuring error brought from environmental change. Features of the sensor are: light weight, simple structure, easy of manufacture.

The invention concerns a method for exciting a sub-wavelength inclusion structure, comprising: providing a first medium having a first refractive index ni and a second medium having a second refractive index nt, wherein ni>nt, wherein the sub-wavelength inclusion structure is arranged at a boundary between the first and second media, wherein the sub-wavelength inclusion structure exhibits polarizability properties; and directing light through the first medium towards the sub-wavelength inclusion structure. The angle of the incident light to the normal of the boundary, θi, is such that, for a given set of: frequency of the light; surface density of inclusions; average polarizability of the inclusion structure at the frequency; first refractive index; and second refractive index, θi fulfils at least one of the relations for s-polarized light and for p-polarized light described herein.

An acoustic reflector (10) suitable for use as a reflective target for navigational aids and for location and re-location applications. The acoustic reflector comprises a shell (12) arranged to surround a solid core (16) . The shell is adapted to transmit acoustic waves (18) incident thereon into the core (16) . Within the core the acoustic waves are focused before being reflected from an opposing side of the shell (20) to provide a reflected acoustic wave. A portion of the acoustic waves incident on the shell is coupled into the shell wall and guided within and around the circumference thereof (26) before being re-radiated and combining constructively with the reflected acoustic wave to provide an enhanced reflected acoustic wave.

The invention discloses a system for detecting sulfur hexafluoride, and belongs to the technical field of detection of sulfur hexafluoride. The system comprises a high-temperature cracking furnace, a selective filter, an SO2 sensor, an air pump and a signal processing module, wherein an air inflow sensor is arranged at an air inlet of the high-temperature cracking furnace; the high-temperature cracking furnace, the selective filter, the SO2 sensor and the air pump are connected sequentially through pipelines; the SO2 sensor is electrically connected with the signal processing module; and the air inflow sensor in the high-temperature cracking furnace is electrically connected with the signal processing module. According to the system, the concentration of SO2 produced by the system is high, interference gas is little, a catalyst is not required to be used, the operability is high, the cost is low, the analysis precision is high, and the lower limit of detection is low.

The invention discloses a plasma flow visualization device based on a glow discharge principle. The plasma flow visualization device comprises a plurality of electrode couples composed of anode electrodes and cathode electrodes, an insulating plate, a dividing wall, an amplifier, a variable voltage variable frequency device, a high-voltage probe, a modulation-demodulation device and a data acquisition device. Three-phase electricity provided by an external power supply is sequentially converted into high-frequency high-voltage alternating currents through the amplifier and the variable voltage variable frequency device, the high-frequency high-voltage alternating currents are loaded to the anode electrodes and the cathode electrodes of the electrode couples, plasma fields are generated between the anode electrodes and the cathode electrodes, high-frequency high voltage between the anode electrodes and the cathode electrodes is obtained through the high-voltage probe, the modulation-demodulation device is adopted to separate originally-applied high-frequency high voltage from an incoming flow unsteady pressure fluctuation, the unsteady pressure fluctuation is collected and analyzed through the data acquisition device at last, a real unsteady pressure fluctuation of a wall is restored, and displaying of real flow fields is achieved.

Circuits and methods for compensating the impact of parasitic capacitances on capacitive sensors have been achieved. The charge of a compensation capacitor assigned to each capacitive sensor is used to neutralize the charge of the parasitic capacitor.

The invention discloses a closed-cup flash point instrument. The closed-cup flash point instrument comprises a horizontal working plane, a vertical working plane, a machine head, a lifting table, a sweeping slide way, a fixing ring, a flash point protection ring, an instrument box, an oil cup opening, an ignition cover fixing hole, a bolt and connecting holes, wherein the horizontal working plane is perpendicular to the vertical working plane; the instrument box is provided with a workbench, and is fixedly arranged on the workbench via the bolt; the horizontal working plane is provided with the oil cup opening which is provided with the flash point protection ring; the flash point protection ring is provided with the fixing ring; the lifting table is arranged at one side of the workbench on the instrument box; one end of the lifting table is fixedly arranged on the instrument box, and the other end surface is provided with the connecting holes. The closed-cup flash point instrument is simple in structure; the opened-cup mode and the closed-cup mode are convenient to switch, and are high in universality; the production and detection costs are reduced; the closed-cup flash point instrument is high in output signal, flexibility and anti-interference capability, and cannot generate leakage detection and misinformation.

Embodiments of the invention disclose a ceramic MEMS pressure sensor. The ceramic MEMS pressure sensor comprises a ceramic substrate, a ceramic circular ring, an MEMS pressure chip, a bonding circuitboard, a signal conditioning circuit board and a cable, wherein the ceramic substrate is provided with a through hole, and the ceramic circular ring is arranged on the ceramic substrate; the MEMS pressure chip is arranged on the ceramic substrate in a sealing manner by virtue of sealing adhesive, and an intermediate hole of the MEMS pressure chip is communicated with a through hole on the ceramicsubstrate; the bonding circuit board is arranged on the ceramic substrate, and the bonding circuit board is electrically connected with the MEMS pressure chip; the signal conditioning circuit board iselectrically connected with the bonding circuit board; and the cable is electrically connected with the signal conditioning circuit board. According to the embodiments of the invention, the MEMS pressure ship is used as a pressure sensitive element, and the ceramic is used as a sealing structure of a skeleton, so that the problems that the output signal is weak, the stability is poor and the accuracy is poor can be solved, and a technical effect of strong output signal, high measuring accuracy and good stability can be achieved.

A method for forming an abutted junction GMR bottom spin valve sensor in which the free layer has a maximum effective length due to the elimination or minimization of bias layer and conducting lead layer overspreading onto the sensor element and the consequent reduction of current shunting. The overspreading is eliminated by forming a thin dielectric layer on the upper surface of the sensor element. When the biasing and conducting leads are formed on the abutted junction, they overspread onto this layer and the overspread can be removed by an ion-milling process during which the dielectric layer protects the sensor.

The invention discloses a pulse output type rotation speed sensor, which comprises a gear disc installed on a rotation shaft, a magnetic pulse sensing permanent magnet, a soft magnet, an induction coil assembly, and a built-in signal reshaping circuit. The pulse output type rotation speed sensor disclosed by the invention can directly output large-amplitude pulse signals and has very strong anti-interference performance. The pulse output type rotation speed sensor adopts a passive designing technology and does not need external power supply, has the advantages of high intensity of output signals, strong anti-interference capability, no need of power supply, convenience in installation and use, no mechanical wear, long service life, and no need of control and provision of any excitation circuit, and can be used in smog, oil gas, hydrosphere and other environments.

The invention provides a preparation method of a gel electrolyte for an electrochemical oxygen alarming device, and belongs to the technical field of electrochemistry. The preparation method comprises the four steps of preparing a water solution of KOH, NaOH or LiOH, dissolving organic polymers, adding inorganic additives and performing still standing defoaming. The preparation method has the advantages that a blending method is adopted for preparing the organic polymer gel electrolyte used for an oxygen sensor. The electrolyte works under the neutral or weak alkaline conditions, and better activity is realized on the oxygen electrochemical reduction, so that the output signal of the oxygen sensor is stronger. The original polymer gel electrolyte prepared by the method has higher conductivity, and has a 1.5V electrochemical stabilization window; meanwhile, the property is stable; the defect that the ordinary gel intensity is insufficient is overcome.

The invention discloses a magnetic liquid micro-pressure difference sensor of a composite magnetic core, comprising a sensor main body and a bridge circuit portion; the sensor main body comprises two identical parts, wherein each part comprises an organic glass tube, a rubber plug, a coil, an annular permanent magnet, a composite magnetic core and a magnetic liquid; the organic glass tube comprises a large diameter portion and a small diameter portion; a rubber plug is plugged into the top end of the large diameter portion on the top, the composite magnet core is arranged on the inner side of the middle portion, and a coil is wounded on the outer side of the lower end; two ends of the composite magnet core absorb the magnetic liquid in a saturation manner; the annular permanent magnet sleeve the small diameter portion on the lower part; the bottom end of the small diameter is connected to a flexible tube which communicates with the two portions of the sensor main body; and the composite magnet core comprises a magnet core, a first permanent magnet and a second permanent. The invention can measure the air pressure difference in the vertical direction and output the evident electric signals. The distance between the two ports for measuring the air pressure difference is adjustable and the cost can be dramatically reduced.

In order to solve a problem of difficult collection of a complex weak differential signal outputted by an auxiliary power system pressure sensor of a certain type of aero-engine, the invention provides a method for collecting a signal from an auxiliary power system pressure sensor of an aero-engine, thereby realizing accurate acquisition of the auxiliary power system pressure sensor signal of the aeroengine. According to the method, an EMI protection unit, a passive low pass filtering unit, a differential amplifying unit, and an active second-order low-pass filtering unit are arranged. The method is designed simply; the anti-interference ability is strong; and the output signal has high intensity. Compared with the traditional signal acquisition system, the signal acquisition method having high universality can be applied to the aeroengine sensor conditioning circuit.

The invention discloses an imaging method. First, an image sensor is provided. The image sensor includes a photosensitive pixel array, a light filter arranged on the photosensitive pixel array, and a micromirror array arranged on the light filter. The light filter includes a light filter The unit array, each filter unit includes a color filter area and an infrared filter area. The micromirrors are in one-to-one correspondence with the photosensitive pixels. The micromirrors include a first micromirror and a second micromirror that produces a greater light flux than the first micromirror under the same illumination. The first micromirror and the second micromirror are respectively connected to the color filter area corresponds to the infrared filter area. Next, the output of the photosensitive pixel array is read, and the pixel values ​​of the composite image are calculated according to the outputs of the photosensitive pixels covered by the color filter area and the photosensitive pixels covered by the infrared filter area to generate a composite image. The resulting composite image contains complete color information and has a high signal-to-noise ratio. The invention also discloses an image sensor, an imaging device and an electronic device which can be used to realize the imaging method.

The invention discloses a plasma flow visualization device based on a glow discharge principle. The plasma flow visualization device comprises a plurality of electrode couples composed of anode electrodes and cathode electrodes, an insulating plate, a dividing wall, an amplifier, a variable voltage variable frequency device, a high-voltage probe, a modulation-demodulation device and a data acquisition device. Three-phase electricity provided by an external power supply is sequentially converted into high-frequency high-voltage alternating currents through the amplifier and the variable voltage variable frequency device, the high-frequency high-voltage alternating currents are loaded to the anode electrodes and the cathode electrodes of the electrode couples, plasma fields are generated between the anode electrodes and the cathode electrodes, high-frequency high voltage between the anode electrodes and the cathode electrodes is obtained through the high-voltage probe, the modulation-demodulation device is adopted to separate originally-applied high-frequency high voltage from an incoming flow unsteady pressure fluctuation, the unsteady pressure fluctuation is collected and analyzed through the data acquisition device at last, a real unsteady pressure fluctuation of a wall is restored, and displaying of real flow fields is achieved.

The invention discloses a magnetohydrodynamic linear vibration sensor with a runway type structure. A metal shell of the magnetohydrodynamic linear vibration sensor is composed of a base and an end cover. A groove is formed in the base. A C-shaped magnetic circuit, permanent magnets and a fluid channel are arranged in the shell. The C-shaped magnetic circuit surrounds the permanent magnets and thefluid channel. The permanent magnets are placed on the two sides of the outer plane of the fluid channel and located at the two ends of an opening of the C-shaped magnetic circuit. A fluid cavity isformed in the fluid channel, and the fluid cavity is filled with conductive fluid. A first electrode and a second electrode are arranged on the upper wall and the lower wall of the bottom straight channel section, being in contact with the permanent magnets, of the fluid channel. The magnetohydrodynamic linear vibration sensor with the runway type structure has the characteristics of wide frequency band, low noise, low power consumption, high reliability, small volume, light weight and long service life, and can stably work in severe environments such as strong impact.

The invention discloses a system for detecting sulfur hexafluoride, and belongs to the technical field of detection of sulfur hexafluoride. The system comprises a high-temperature cracking furnace, a selective filter, an SO2 sensor, an air pump and a signal processing module, wherein an air inflow sensor is arranged at an air inlet of the high-temperature cracking furnace; the high-temperature cracking furnace, the selective filter, the SO2 sensor and the air pump are connected sequentially through pipelines; the SO2 sensor is electrically connected with the signal processing module; and the air inflow sensor in the high-temperature cracking furnace is electrically connected with the signal processing module. According to the system, the concentration of SO2 produced by the system is high, interference gas is little, a catalyst is not required to be used, the operability is high, the cost is low, the analysis precision is high, and the lower limit of detection is low.

The invention discloses an untwisting system of a wind driven generator and an untwisting method thereof. The untwisting system comprises a controller, a yawing motor, a wind driven generator revolving body, a worm gear reducer, a worm rod, a worm wheel, a wind driven generator revolving shaft, an angle sensor, a dip angle adjusting module and a disc, wherein the controller is connected with the yawing motor; one end of the worm gear reducer is connected with the yawing motor, and the other end is connected with the worm rod; the worm wheel is fixedly connected with the wind driven generator revolving shaft; the worm rod is fixedly connected with the wind driven generator revolving body; the worm gear reducer comprises the angle sensor; and the wind driven generator revolving body is fixedly connected with the dip angle adjusting module. The untwisting process is precise and simple; and the electricity generation efficiency also can be improved through the adjustment of the dip angle adjusting module.

The invention relates to a piezoelectric type 3D acceleration transducer that includes an isolating base, case, subpanel upper piezoelectric component, insulation spacer and inertia mass block, and signal leading yarn. The piezoelectric component includes four XO degree cut quartz wafer and four YO degree cut quartz wafer. They are installed in four angles and four borders of the wafer locating frame between the isolation spacers. The invention has the advantages of light weight, simple structure, and is easy to manufacture. It has high sensitivity and could conquer the error brought by the alteration of environment.

The invention discloses an ultrahigh frequency response plasma flow measurement device. The ultrahigh frequency response plasma flow measurement device comprises an amplifier, a frequency and voltage conversion device, a plasma probe or sensor, a modulation-demodulation device and a data acquisition device. A voltage provided by a power source passes through the amplifier and the frequency and voltage conversion device in sequence and produces a high-frequency and high-voltage level, the high-frequency and high-voltage level is applied to the two ends of the plasma probe or sensor, and a plasma field is excised between two electrodes of the plasma probe or between two electrodes of the sensor; incoming current fluctuating speed or wall surface unsteady pressure fluctuation contained in the high-frequency and high-voltage level is detected by a high-voltage probe and transmitted to the modulation-demodulation device, the modulation-demodulation device decomposes the high-frequency and high-voltage level, current field signals are separated from the high-frequency and high-voltage level, and acquisition, storage and analysis are completed in the data acquisition device. By means of the ultrahigh frequency response plasma flow measurement device, the requirements for high spatial resolution and temporal resolution can be met simultaneously, and measurement of current field high-frequency pulsation and a vortex structure is achieved.

A micromechanical component for a micromirror-based laser system for detecting an incident laser beam. Two sensor diodes are situated on a shared substrate in the micromechanical component, only one of the two sensor diodes being designed as a photodiode. The further sensor diode supplies an output signal independent of an incidence of light. By comparing the two output signals of the two diodes, an incidence of light in the micromechanical component may be inferred.

The invention discloses a magnetic liquid micro-pressure difference sensor of a composite magnetic core, comprising a sensor main body and a bridge circuit portion; the sensor main body comprises two identical parts, wherein each part comprises an organic glass tube, a rubber plug, a coil, an annular permanent magnet, a composite magnetic core and a magnetic liquid; the organic glass tube comprises a large diameter portion and a small diameter portion; a rubber plug is plugged into the top end of the large diameter portion on the top, the composite magnet core is arranged on the inner side of the middle portion, and a coil is wounded on the outer side of the lower end; two ends of the composite magnet core absorb the magnetic liquid in a saturation manner; the annular permanent magnet sleeve the small diameter portion on the lower part; the bottom end of the small diameter is connected to a flexible tube which communicates with the two portions of the sensor main body; and the composite magnet core comprises a magnet core, a first permanent magnet and a second permanent. The invention can measure the air pressure difference in the vertical direction and output the evident electric signals. The distance between the two ports for measuring the air pressure difference is adjustable and the cost can be dramatically reduced.

The invention provides a protection system based on steam turbine emergency interruption, which is used for the safety protection of the steam turbine, including: two first lubricating oil pressure transmitters, used to collect the lubricating oil pressure analog signal at the front box; Two lubricating oil pressure transmitters, used to collect the lubricating oil pressure analog signal at the cranking place; three vacuum pressure transmitters, used to collect the vacuum pressure analog signal; ETS analog input board, used to receive and output Analog signal; bearing vibration sensor, used to collect vibration signal; pre-processor, used to convert signal into analog signal; TSI controller, used to judge signal and output switch signal; EST switch output board; and The ETS controller is connected with the ETS analog input board and the EST digital output board through a cable, and is used to receive the lubricating oil pressure analog signal, the lubricating oil pressure analog signal and the switching signal, and control according to the received signal The protection logic judgment is carried out in the device logic.

The invention refers to a real-time latent-image self-monitoring method in the course of making a holographic grating. It uses arbitrary interference recording light beam of the light intensity acting on the grating as the real-time sub-image self-monotiring incident light beam, and when the ratio of the wavelength of the incident light beam and the period of the grating lambda / d<2 / 3, the grating has multiple diffraction levels, it real-time self-monitors the light beam outside the system collimated and photoelectricly multiplied in the transmission direction of self-diffractions Ir2 and Ir1 of arbitrary level sub-image, or real-timely self-monitors the autocollimating level returning according to the original route filtered, collimated and photoelectricaly multiplied.

The invention relates to a differential piezoelectricity 3D force sensor that includes dynamometer, base and cover. Eight locating holes are set on the insulated locating frame, and the center connecting line is square. Four locating holes are located on the four foursquare of the square that is the X0 degree type quartz crystal. The X axis is plumped to the reverse axial direction of the angle wafer. The other four locating holes are in center pointer of the square, and the quartz crystal is Y0 degree type quartz crystal. The invention is simple structure, and is easy to manufacture. It could realize differential measuring to signal. It has high accuracy, and is suitable for plural occasions.