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38results about How to "Adjustable magnification" patented technology
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High-strength mining expansion filling fireproofing and extinguishing material and application method thereof
The invention discloses a high-strength mining expansion filling fireproofing and extinguishing material and an application method thereof. The material comprises the following substances in parts by weight: 16-25 parts of aluminate cement clinker, 12-20 parts of Portland cement clinker, 4-16 parts of active calcic material, 6-15 parts of setting accelerator, 5-10 parts of quicklime, 22-40 parts of fly ash, 0.1-1 part of zinc powder foaming agent, 0.5-2 parts of thickening time control agent, 1-2 parts of aluminum hydroxide, 1-3 parts of dispersing agent and a proper amount of sodium hydroxide. By adding the sodium hydroxide, the pH value of the prepared slurry is 12-13. The material can obviously enhance the compression strength of the filled body, can enhance the critical fracture toughness and stability of the filled body, implements long-distance line delivery, and also implement quick filling and high-efficiency fireproofing and extinguishment.
Owner:CHINA UNIV OF MINING & TECH (BEIJING)
Current type terahertz pyroelectricity detector reading circuit
InactiveCN103913240AEliminate power frequency interferenceFilter out the signalRadiation pyrometryVoltage converterComputer module
The invention discloses a current type terahertz pyroelectricity detector reading circuit, and belongs to the field of terahertz detecting and imaging. The reading circuit comprises a current-voltage converter, a 50Hz trap circuit, a first-order lowpass filtering amplifying circuit and an electric potential raising module. Signals output by the terahertz pyroelectricity detector are input into the current-voltage converter so that the current signals can be converted into voltage signals; the signals output by the current-voltage converter are input into the 50Hz trap circuit so that power frequency interference can be eliminated; the signals output by the 50Hz trap circuit are input into the first-order lowpass filtering amplifying circuit so that the signals can be further amplified; the signals output by the first-order lowpass filtering amplifying circuit are input into the electric potential raising module so that a voltage can be raised and the voltage signals output by the circuit can be matched with a voltage required by a rear digital collecting circuit. The voltage signals output by the circuit are pure, and the circuit is suitable for collecting and outputting a weak current of the terahertz pyroelectricity detector.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
Novel glasses type displayer
InactiveCN101153958AAdjustable thicknessAdjust object sizeOptical elementsGlasses typeDisplay device
The present invention relates to a novel spectacles type display which comprises micro-display chips, optical prisms, a display control circuit, etc. Two identical micro-display chips are cooperated with two optical prisms to form a binocular spectacles type display; the micro-display chips and the optical prisms respectively form a left-eye display and a right-eye display; the left-eye display and the right-eye display have symmetrical spatial locations; the distance between centers of the left-eye display and the right-eye display is between 63 mm and 65 mm; the inverted extension lines of normals of image surfaces of two displays intersect in the two-meter-place. The optical prism has three surfaces: a plane, a spherical surface and a free curved surface. Three surfaces of the optical prism of the invention only have a non-standard curved surface in order that the design, adjustment and manufacturing methods are simple and feasible. The invention adopts an AV port and a VGA port compatible with VESA standard and can link to any video equipment with the AV port and the VGA port. The invention also has the function of focusing for myopes to use.
Owner:深圳国际技术创新研究院
Detection and amplification device for micro current
ActiveCN102098012AAccurate samplingAdjustable magnificationCurrent/voltage measurementDifferential amplifiersEngineeringControl circuit
The invention discloses a detection and amplification device for micro current, comprising a sampling circuit, an MCU (Micro Control Unit) control circuit and an amplification circuit, wherein the MCU control circuit controls sampling voltage; the amplification circuit amplifies the sampling voltage output by the sampling circuit; a filtering amplitude limiting circuit is connected between the sampling circuit and the amplification circuit; the amplification circuit comprises a first amplification circuit and a second amplification circuit; the filtering amplitude limiting circuit comprises afirst filtering amplitude limiting circuit and a second filtering amplitude limiting circuit; the MCU control circuit controls the first path of sampling voltage output by the sampling circuit to be filtered by the first filtering amplitude limiting circuit, and the first path of sampling voltage is input into a first path of amplification circuit for amplifying; and the MCU control circuit controls the second path of sampling voltage output by the sampling circuit to be filtered by the second filtering amplitude limiting circuit, and then, the second path of sampling voltage is input to the second amplification circuit for amplifying. The detection and amplification device has the advantages of accurate sampling, adjustable amplification multiple, simple circuit, reasonable design, strong practicality, simplified use and operation and strong anti-interference performance, and is simple and easy to realize.
Owner:HISENSE HOME APPLIANCES GRP CO LTD +1
Super magnetostrictive material driven microdisplacement mechanism
InactiveCN101166005BHigh magnification and adjustableAdjustable magnificationPiezoelectric/electrostriction/magnetostriction machinesEngineeringSingle level
This invention relates to a micro-shift unit driven by a magnetostrictive material including: a tube, a lever structure, a driving disc, a lower spacing ring, an excitation coil, a magnetostrictive rod, an upper spacing disc, bolts, an output pole, a base and a reset spring, in which, an amplifying unit of 1-3 level is set between the magnetostrictive rod and the output pole composed of lever components and a driving disk, which selects combination of single level or multi-level amplifying unit and different amplifying multiples of single level lever to adjust the amplifying multiple of the micro-shift unit.
Owner:BEIJING UNIV OF CHEM TECH
8k line scanning lens
A 8k line scan lens is characterized in that, from an object side to an image side, a first convex-concave lens, a second convex-concave lens, a doublet of a first biconvex lens and a first biconcave lens, an iris, a doublet of a second biconcave lens and a second biconvex lens, a first concave-convex lens and a second concave-convex lens are sequentially fixed in a lens barrel. The invention has the advantages of high accuracy and small aberration, and the image is unlikely to be distorted. The line scan lens with adjustable amplification rate can be applied in automatic optical detection equipment and can be matched with large-size and high-accuracy line array CCD camera.
Owner:THE 45TH RES INST OF CETC
Earthquake forecasting instrument and using method thereof
The invention provides an earthquake forecasting instrument which comprises a base, a coil, an alternating current amplifier, a current-limiting gate and an alarm device, wherein the coil is vertically arranged above the base; the coil, the alternating current amplifier, the current-limiting gate and the alarm device are sequentially connected; an amplification factor of the alternating current amplifier can be adjusted; the alternating current amplifier is provided with discontinuous gears; and the current-limiting gate is structurally characterized in that the current-limiting gate is conducted when an input voltage is larger than a rated voltage and is cutoff when the input voltage is less than the rated voltage. The earthquake forecasting instrument can monitor earth magnetism abnormal fluctuation in the early stage of earthquakes, has simple structure and low cost, is free from environmental influence and is convenient for a person to carry and use.
Owner:启东兴源生态有机肥料有限公司
Portable cutter wear measurement apparatus
InactiveCN106546175ASimple structureEasy to useUsing optical meansImage processing softwareEngineering
Disclosed is a portable cutter wear measurement apparatus. The apparatus is characterized by comprising a miniaturized microscope (1), a mobile phone (2) and an elastic mobile phone clamp (3), wherein an ocular lens end of the miniaturized microscope (1) is installed on one clamping jaw (4) of the elastic mobile phone clamp (3) in a rotating mode, the clamping jaw (4) is provided with a through hole, the through hole is opposite to a shooting lens of the mobile phone (2), another clamping jaw (5) of the elastic mobile phone clamp is clamped on the front surface of the mobile phone (2), and the mobile phone (2) processes a shot picture by use of its own image processing software or sends the shot picture through a data line to a computer (8) preinstalled with the image processing software for analysis so as to obtain cutter wear data. The structure is simple, the application is convenient, real-time rapid detection can be performed without removing a cutter from a knife rest, wear conditions can be obtained timely, and a basis can be provided for replacing or reconditioning the cutter.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Chip mounter suction nozzle inspection device
PendingCN110823475AEasy to operateEasy to controlMeasurement of fluid loss/gain rateOptically investigating flaws/contaminationElectrical controlInlet valve
The invention provides a chip mounter suction nozzle inspection device. The chip mounter suction nozzle inspection device comprises a body frame, a rotary platform device, an electrical control device, a high-definition image shooting device, an integrated computer, a vacuum detection device, an air inlet valve and a wiring control device, wherein a push-pull type cover plate is arranged between an upper interlayer and a middle interlayer of the body frame, and the integrated computer and the high-definition image shooting device are mounted on the upper interlayer; the middle interlayer is divided into a front part and a rear part by a partition plate, and the rotary platform device and the electrical control device are mounted on the front part and the rear part of the middle interlayerrespectively; the vacuum detection device is mounted below a rotary platform; the air inlet valve and the wiring control device are fixedly mounted on a side plate of a lower interlayer through screws. The chip mounter suction nozzle inspection device adopts a frame structure, is easy to control, convenient to take and place, stable in operation and high in precision, can clearly display the surface condition of a suction nozzle opening, detects the condition of a through hole in a suction nozzle, and can achieve vacuum degree detection on the suction nozzle.
Owner:NANJING PANDA ELECTRONICS MFG
Three-phase dry type magnetic voltage regulator driver for driving cathodic power supply for processing niobium-silicon alloy
ActiveCN102323843ASmooth and controllable on-load stepless voltage regulation characteristicsReliable operationElectric variable regulationMagnetic fluxThree-phase
Owner:成都航大新材料有限公司
Integrated weak electric signal filtering and amplifying circuit
PendingCN111510080AImprove signal-to-noise ratioImprove anti-interference abilityAmplifier modifications to reduce non-linear distortionAmplifier modifications to reduce noise influenceCapacitanceTarget signal
The invention discloses an integrated weak electric signal filtering and amplifying circuit, which comprises a coupling capacitance circuit, a first chopping change-over switch circuit, an operationalamplifier circuit, a second chopping change-over switch circuit, a filtering circuit, a first direct current feedback circuit, a second direct current feedback circuit, a first feedback capacitor array circuit and a second feedback capacitor array circuit. The integrated weak electric signal filtering and amplifying circuit provided by the invention can effectively eliminate DC offset of electrodes without causing distortion of a target signal, can suppress motion artifacts to a certain extent, and has configurable high-pass cut-off frequency, adjustable magnification times and low circuit noise at the same time, thereby improving the integration level and precision of the whole signal acquisition system.
Owner:深圳芯森微电子有限公司
Lens and manufacturing method thereof as well as glasses and optical system
ActiveCN108388025AReduce overall chromatic aberrationAdjustable degreeSpectales/gogglesNon-linear opticsUses eyeglassesLength wave
The invention provides a lens and a manufacturing method there as well as a pair of glasses and an optical system. The lens comprises a fresnel liquid crystal lens and a geometric lens. According to the lens provided by the invention, the fresnel liquid crystal lens can electrically control and adjust the focal length of the lens; furthermore, the fresnel liquid crystal lens is also combined withthe geometric lens for use, the focal length and wavelength of the fresnel liquid crystal lens are inversely proportional, and the focal length of the geometric lens is proportional to the wavelengththe geometric lens, so that the problem of chromatic aberration of the common optical component can be effectively reduced by the combination of the fresnel liquid crystal lens and the geometric lens.
Owner:BOE TECH GRP CO LTD
Piezoresistive force sensor signal amplification module
InactiveCN112393828AAdjustable magnificationHigh magnificationFluid pressure measurement using ohmic-resistance variationAmplifier combinationsControl engineeringHemt circuits
The invention discloses a piezoresistive force sensor signal amplification module, which comprises a power interface, a power conversion circuit, an input interface, a primary amplification circuit, aprimary amplification output bias circuit, a secondary amplification circuit and an output interface, an external power supply is introduced from the power supply interface, and multiple paths of power supplies are output through voltage reduction of the power supply conversion circuit to supply power to circuits and force sensors; the input interface accesses a pair of differential signals output by the force sensor and supplies power to the force sensor; the first-stage amplification circuit amplifies a pair of differential signals accessed to the input interface, the output voltage is increased or decreased through the first-stage amplification output bias circuit, and the differential signals are amplified through the second-stage amplification circuit and then output through the output interface. The module is simple, easy to use, high in universality, high in reliability and capable of supplying power to the force sensor and amplifying signals, the amplification factor and biasvoltage of the module can be adjusted, the force measurement precision is effectively improved through proper adjustment, the module can be directly applied to various devices, and the device development and production cost is greatly saved.
Owner:NANJING PANDA ELECTRONICS +1
Liquid lens and using method thereof and optical system
The invention provides a liquid lens and a using method thereof and an optical system. The liquid lens comprises an annular first electrode, a second electrode, a first cover plate, a liquid storage cavity at least formed by a first electrode, a second electrode and the first cover plate, an optical liquid stored in the liquid storage cavity, and a flow control device arranged on the side wall of the liquid storage cavity and communicated with the liquid storage cavity to control the proportion of a conductive liquid to a non-conductive liquid. According to the liquid lens and the using method thereof and the optical system, the liquid storage cavity is formed on the basis of the containing area defined by the annular first electrode, the flow control device is designed on the side portion of the liquid storage cavity, and the proportion of the conductive liquid to the non-conductive liquid in the liquid storage cavity can be changed through the flow control device; and the liquid lens is simple in structure, high in imaging quality, adjustable in magnification and convenient to integrate, and can be widely applied to optical focusing and zooming systems.
Owner:上海酷聚科技有限公司
Busbar current leakage detection apparatus with input protection
InactiveCN105954638ASimple structureReduce volumeElectrical testingCurrent measurements onlyElectrical resistance and conductanceAudio power amplifier
The invention belongs to the technical field of busbar monitoring, in particular to a busbar current leakage detection apparatus with input protection. The technical problem to be solved by the invention is to provide a busbar current leakage detection apparatus which has small-sized circuits, can be manufactured at a low cost and provides highly stable performances. The apparatus comprises a photoelectric isolation circuit, an amplifying circuit, a wireless transmitter and a controller wherein the photoelectric isolation circuit includes an optical-coupler (A1), a resistor (R1), a resistor (R2) and a diode (D1). The amplifying circuit comprises an instrument amplifier (B1), a resistor (R3), a resistor (R4) and a resistor (R5). The invention can find applications in an electric power department.
Owner:STATE GRID CORP OF CHINA +1
CT imaging device
PendingCN114280086AEliminate distractions from imagingShorten the travel distanceMaterial analysis using wave/particle radiationRadiologyNuclear medicine
A CT imaging device disclosed by the present invention comprises a shielding cabinet, a multi-axis motion platform, a ray source assembly, a detection assembly, a loading platform and an X-ray shielding plate, the multi-axis motion platform, the ray source assembly, the detection assembly, the loading platform and the X-ray shielding plate are all located in the shielding cabinet, and the multi-axis motion platform comprises a base. The radiation source assembly and the detection assembly are arranged on the base in a sliding mode in the length direction of the to-be-detected piece, the radiation source assembly comprises a plurality of radiation sources, and the detection assembly comprises a plurality of detectors. According to the invention, the object carrying platform is used for rotatably fixing the to-be-detected piece and is matched with the ray source assembly and the detection assembly to synchronously move along the length direction of the to-be-detected piece, so that semi-circumferential or whole-circumferential equal scanning detection of different faults of the to-be-detected piece can be met, and the measurement precision is improved.
Owner:CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST
VR video slow live broadcast interaction method and system
ActiveCN112533005AImprove experienceIncrease the use viscositySelective content distributionLive videoHuman–computer interaction
The invention discloses a VR video slow live broadcast interaction method and system. The VR video slow live broadcast interaction method comprises the steps of: acquiring a VR video slow live broadcast stream, and carrying out the video live broadcast after preprocessing; receiving an interaction request sent by a user through using VR interaction equipment in the live video broadcasting processand responding to the interaction request, wherein the step is specifically implemented by sending a request for amplifying a specific region through VR interaction equipment in a live video broadcasting process by a user; and acquiring information of the specific area, performing fusion decoding, and performing amplified rendering display based on the view angle center of the specific area. Aiming at a new live broadcast form of slow live broadcast, audiences can feel a 360-degree all-around service scene in a VR video mode, an interaction means is introduced for weakening the interest of long-time watching, the audiences can select interested view angle areas to amplify and watch ultra-high-definition picture details, the amplification factor is adjustable, the information amount is large, the interaction feeling is strong, the display effect is excellent, the user experience is remarkably improved, and the watching loyalty of the user is improved.
Owner:AVIT
Training simulation device of neuroendoscopy
InactiveCN101582212ASuitable for preliminary understandingImaging is stable and reliableEndoscopesEducational modelsMagnificationNeuroendoscopy
The invention relates to a training simulation device of a neuroendoscopy, which is characterized by comprising a camera and a USB connecting wire with a USB interface; the camera is connected to a DSP integrated board and positioned in the central position of the DSP integrated board; the DSP integrated board is also connected with a plurality of light emitting diodes; the DSP integrated board is fixedly arranged at the front end of an insulated hollow strut rod; a connecting wire electrically connected with the DSP integrated board passes through the inside of the strut bar; the other end of the connecting wire is connected with the USB connecting wire; the USB connecting wire is fixed in a handle at the rear end of the strut rod and positioned outside the strut rod; the position on the strut rod close to the handle of the rear end is provided with a switch; and the switch is electrically connected with the connecting wire of the strut rod. The training simulation device has stable and reliable imaging, is provided with a light source, fits practical operation, is suitable for new trainees to preliminarily know the neuroendoscopy, can adjust magnification times, is close to the operation of a real endoscope, is provided with the USB connector which can be in seamless connection with a home computer for training simulation at any moment and any place, has low manufacturing cost and can be replenished in time after being damaged.
Owner:李学元 +1
Liquid nitrogen frozen rock microstructure in-situ observation method
ActiveCN111175329AThe actual situation of the fracturing site is in line withThe actual situation meetsMaterial analysis using wave/particle radiationRock microstructureObservational method
The invention provides a liquid nitrogen frozen rock microstructure in-situ observation method. The method comprises steps of (1) heating a polished rock sample so that the rock sample is uniformly heated; (2) fixing the uniformly heated rock sample on a sample holder; (3) soaking the rock sample in liquid nitrogen till an internal temperature field of the rock is stable; (4) sequentially carryingout vacuumizing treatment, sublimation treatment and coating treatment of the rock sample; and (5) observing the rock sample subjected to film coating treatment by using a freezing electron microscope. The method is advantaged in that the microstructure of the liquid nitrogen frozen rock can be observed in situ in an ultralow temperature environment (-185 DEG C), the temperature of the rock sample in the observation process is consistent with the actual situation of a liquid nitrogen fracturing site, and the observed thermal stress micro-crack size and other microstructures better conform tothe actual situation of the liquid nitrogen fracturing site.
Owner:CHINA UNIV OF PETROLEUM (BEIJING)
Apparatus used for fabrication of printed circuit board
InactiveCN102495537AReduce usageReduce processing difficultyPhotomechanical exposure apparatusMicrolithography exposure apparatusImaging modalitiesLight spot
The invention relates to an apparatus used for fabrication of a single-sided printed circuit board. The apparatus comprises a UV-light generating device and is characterized in that UV light emitted by the UV-light generating device is reflected by a first reflector and irradiates on a dodging system, after passing through a first field lens, a second field lens and a second reflector, uniform light spots formed by the dodging system irradiate on a photographic film on which an original pattern needing exposure is drawn, the original pattern on the photographic film is m times smaller than a pattern which actually forms on the printed circuit board, wherein m is more than 1, and the photographic film, as an object plane of an optical amplification system, forms an image on the printed circuit board to be exposed after the photographic film is amplified by the optical amplification system. The invention has the following advantages: a manner of multiplying-imaging of non-parallel light is employed; compared to conventional exposure machines, the apparatus provided in the invention enables utilization of a large-aperture curved reflector to be avoided, equipment processing difficulty to be reduced, cost to be lowered down and the volume of equipment to be reduced.
Owner:上海飞为智能系统股份有限公司
Non-blind area magnetic field measuring device and measuring method based on laser polarization modulation
ActiveCN114217249AChanging tensor polarization distributionEliminate the blind area of vector magnetic field measurementMagnetic field measurement using magneto-optic devicesTemperature controlParticle physics
The invention provides a non-blind area magnetic field measuring device and method based on laser polarization modulation. The non-blind area magnetic field measuring device comprises a light path module, an atomic gas chamber, a temperature control module, a magnetic field control module and a signal analysis control module. The atom gas chamber is filled with alkali metal atoms as a working substance; the light path module is used for pumping and detecting alkali metal atoms in the atomic gas chamber; the temperature control module is used for stabilizing the temperature of the atomic gas chamber within a preset temperature range of + / -1 DEG C; the magnetic field control module is used for generating an alternating excitation magnetic field required by the atomic gas chamber; and the signal analysis control module is used for resolving to obtain to-be-measured magnetic field intensity and azimuth information. According to the invention, a vector magnetic field measurement blind area corresponding to tensor polarization single distribution is effectively eliminated.
Owner:NAT INNOVATION INST OF DEFENSE TECH PLA ACAD OF MILITARY SCI
Method for detecting line insulation of circuit board
ActiveCN102539923BImprove reliabilitySimple structureResistance/reactance/impedencePower flowInput impedance
Owner:常州市优策电子科技有限公司
Integrated laser damage surface observation system
InactiveCN113484326ASimple structureAdjustable magnificationOptically investigating flaws/contaminationImaging processingMagnification
The invention relates to an integrated laser damage surface observation system which is characterized in that after being illuminated by an LED light source, a sample damaged surface is amplified and imaged by a microscope objective, a tubular lens and a CCD camera on a coaxial system, and is displayed in a computer in real time for image processing. Reflection-type observation can be adopted for light-proof samples, transmission-type observation can be adopted for light-transmitting samples, and the microscope objective, the tubular lens and the CCD camera are integrated through the coaxial system, so that it is guaranteed that incident light rays are coaxial; the coaxial system can be moved for focusing, so that aberration can be effectively reduced, and a light path can be adjusted conveniently. The system is simple in device and structure, is in self-assembly design, has adjustable magnification times and low cost, can measure the damage degree from the surface fine structure change level, and can be applied to the technical fields of laser damage, laser damage and the like.
Owner:NANKAI UNIV
Earthquake forecasting instrument and using method thereof
The invention provides an earthquake forecasting instrument which comprises a base, a coil, an alternating current amplifier, a current-limiting gate and an alarm device, wherein the coil is vertically arranged above the base; the coil, the alternating current amplifier, the current-limiting gate and the alarm device are sequentially connected; an amplification factor of the alternating current amplifier can be adjusted; the alternating current amplifier is provided with discontinuous gears; and the current-limiting gate is structurally characterized in that the current-limiting gate is conducted when an input voltage is larger than a rated voltage and is cutoff when the input voltage is less than the rated voltage. The earthquake forecasting instrument can monitor earth magnetism abnormal fluctuation in the early stage of earthquakes, has simple structure and low cost, is free from environmental influence and is convenient for a person to carry and use.
Owner:启东兴源生态有机肥料有限公司
Spray head lifting locating method
The invention discloses a spray head lifting locating method. The two opposite sides of a mounting rack are mounted on two lifting guide frames (1); spray heads are mounted on the mounting rack; a ball screw (2) is arranged on each lifting guide frame; the number of the lifting guide frames and the number of the ball screws are each two, and the two ball screws are mounted on the two lifting guideframes correspondingly; the two ends of the mounting rack are mounted on the two ball screws in a sleeved manner; when servo motors rotate, the mounting rack and the spray heads can be driven throughtransmission of the ball screws to ascend and descend; a tilt angle sensor used for detecting the tilt angle of the mounting rack is arranged on the mounting rack; the two ball screws are driven by the two independent servo motors (6) correspondingly; the tilt angle sensor is connected with an MCU; the servo motors are controlled by the MCU; and the MCU controls the height of the mounting rack and the height of the spray heads by controlling the servo motors, and lifting locating of the spray heads is achieved. According to the spray head lifting locating method, the locating precision is high, and implementation is easy.
Owner:YUEYANG BAOLI TEXTILE
A current mode terahertz pyroelectric detector readout circuit
InactiveCN103913240BEliminate power frequency interferenceSignal amplificationRadiation pyrometryVoltage converterPower flow
The invention discloses a readout circuit of a current-type terahertz pyroelectric detector, which belongs to the field of terahertz detection and imaging. The readout circuit includes a current-voltage converter, a 50Hz trap circuit, a first-order low-pass filter amplifier circuit and a potential raising module. Among them, the signal output by the terahertz pyroelectric detector is input into the current-voltage converter, which is used to convert the current signal into a voltage signal; the signal output by the current-voltage converter is input into the 50Hz trap circuit, which is used to eliminate power frequency interference; The signal output by the 50Hz notch circuit is input into the first-order low-pass filter amplifier circuit for further signal amplification; the signal output by the first-order low-pass filter amplifier circuit is then input into the potential raising module, which is used to raise the voltage so that the voltage signal output by the circuit is consistent with the subsequent The terminal digital acquisition circuit needs to match the voltage. The voltage signal output by the readout circuit is pure, and is suitable for collecting and outputting the weak current of the terahertz pyroelectric detector.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
A high-strength mine-used expansion filling fire-proof material and its application method
ActiveCN106220216BReduces the possibility of crackingHigh compressive strengthDust removalFire preventionFireproofingSlurry
Owner:CHINA UNIV OF MINING & TECH (BEIJING)
Bipolar pnp transistor and method of manufacturing the same
ActiveCN103646963BChange charge concentrationAdjustable magnificationTransistorSemiconductor/solid-state device manufacturingInterconnectionDielectric layer
The invention provides a bipolar PNP transistor and a manufacturing method thereof. The bipolar PNP transistor comprises a substrate, an epitaxial layer formed on the substrate, a deep phosphorus zone, a base zone, a collection zone and an emission zone which are formed in the epitaxial layer, a first interlayer dielectric layer and a voltage modulation dielectric layer which are formed on the epitaxial layer, a first interconnection line formed on the first interlayer dielectric layer and the voltage modulation dielectric layer, a second interlayer dielectric layer formed on the first interlayer dielectric layer and the first interconnection line, and a second interconnection line formed on the second interlayer dielectric layer, wherein the base zone is covered by the voltage modulation dielectric layer, and electric leading out is realized through the first interconnection line. According to the bipolar PNP transistor and the manufacturing method, through forming the voltage modulation dielectric layer on the base zone, the electric leading out of the voltage modulation dielectric layer is realized through the first interconnection line, so the charge concentration of a base zone surface is changed through changing the induction charge number of the voltage modulation dielectric layer, and thus the magnification times of small current is adjustable.
Owner:CHENGDU SILAN SEMICON MFG
Detection and amplification device for micro current
ActiveCN102098012BAccurate samplingAdjustable magnificationCurrent/voltage measurementDifferential amplifiersEngineeringControl circuit
The invention discloses a detection and amplification device for micro current, comprising a sampling circuit, an MCU (Micro Control Unit) control circuit and an amplification circuit, wherein the MCU control circuit controls sampling voltage; the amplification circuit amplifies the sampling voltage output by the sampling circuit; a filtering amplitude limiting circuit is connected between the sampling circuit and the amplification circuit; the amplification circuit comprises a first amplification circuit and a second amplification circuit; the filtering amplitude limiting circuit comprises afirst filtering amplitude limiting circuit and a second filtering amplitude limiting circuit; the MCU control circuit controls the first path of sampling voltage output by the sampling circuit to be filtered by the first filtering amplitude limiting circuit, and the first path of sampling voltage is input into a first path of amplification circuit for amplifying; and the MCU control circuit controls the second path of sampling voltage output by the sampling circuit to be filtered by the second filtering amplitude limiting circuit, and then, the second path of sampling voltage is input to the second amplification circuit for amplifying. The detection and amplification device has the advantages of accurate sampling, adjustable amplification multiple, simple circuit, reasonable design, strong practicality, simplified use and operation and strong anti-interference performance, and is simple and easy to realize.
Owner:HISENSE HOME APPLIANCES GRP CO LTD +1
Spray head lifting and positioning mechanism and printing device
The invention discloses a spray head lifting and positioning mechanism and a printing device. The spray head lifting and positioning mechanism comprises lifting guide frames (1), ball screws (2) and aservo motor (6); a spray head is mounted on a mounting frame; the lifting guide frame and the ball screw are both two, and the two ball screw rods are arranged on the two lifting guide frames respectively; the two ends of the mounting frame with the spray head are sleeved with the two ball screw rods; each ball screw is driven by the servo motor (6); when the servo motor rotates, the mounting frame and the spray head can be driven to ascend and descend through the transmission of the ball screw; the mounting frame is provided with an inclination angle sensor used for detecting the inclinationangle of the mounting frames; the two ball screws are driven by two independent servo motors respectively; a tilt angle sensor is connected with a MCU; and the servo motor is controlled by the MCU. The spray head lifting and positioning mechanism and the printing device are compact in structure, high in positioning precision and easy to implement.
Owner:YUEYANG BAOLI TEXTILE
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