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31results about How to "Simplify debugging difficulty" patented technology
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Aligning system photolithography equipment
ActiveCN101114135ASimplify design difficultySimplify debugging difficultyPhotomechanical exposure apparatusMicrolithography exposure apparatusPhase gratingLithographic artist
The invention discloses an alignment system applied in a lithography device, which uses three periods phase grating with crude precision combination in a substrate marker or a substrate station reference marker, uses a first order diffraction light of the three periods as an alignment signal, simultaneously realizes a big capture range and gets high alignment precision, gets labeled deformation information and other useful information, and through the optimum design of the match and / or the layout of the three periods, the influence on an alignment position by asymmetrical deformation of the marker is effectively reduced.
Owner:SHANGHAI MICRO ELECTRONICS EQUIP (GRP) CO LTD
Electronic equipment
ActiveCN104934706AMaintenance of DesignsSave spaceSimultaneous aerial operationsAntenna equipments with additional functionsCapacitanceResonance
An electronic device is disclosed in embodiments of the present invention. The electronic device has a metal frame, and also comprises an antenna feeding point, an antenna ground, a feeding branch, a grounding branch, an antenna resonance arm, a variable capacity and a control circuit. The antenna resonance arm is a part of the partitioned metal frame, and the antenna feeding point is set on the feeding branch. A first connector and a second connector are set on the antenna resonance arm. The first connector is set on a first end of the antenna resonance arm, and the second connector is set between the first end and a second end of the antenna resonance arm. The feeding branch is set between the second connector and the antenna ground, and the grounding branch is set between the first connector and the antenna ground. The variable capacity is set on the feeding branch and between the antenna feeding point and the second connector. The control circuit is used for adjusting the capacitance of the variable capacity. According to above disclosed contents, the technical solution provided in the present invention gives attention to both the bandwidth and efficiency of the antenna, and keeps appearance uniformity of the metal frame of the whole device.
Owner:HUAWEI DEVICE CO LTD
Adaptive synchronous rectification control system and control method for active clamp flyback converter
ActiveCN109067181AImprove adaptive adjustment abilityReduce oscillationEfficient power electronics conversionDc-dc conversionMicrocontrollerActive clamp
The invention discloses an adaptive synchronous rectification control system and a control method of an active clamp flyback converter. The control system includes sampling and signal processing circuits, control circuits based on microcontroller and gate driver. The control method can realize the on-state of the secondary synchronous rectifier of the active clamp flyback converter, turn off too early, turn off too late, and directly detect the off-state, and can control the accurate on-state of the synchronous rectifier and the on-time of the synchronous rectifier in the next cycle accordingto the detection result. After several cycles of adaptive control, the synchronous rectifier enters the just-off state, avoids the output waveform oscillation of the active clamp flyback converter, reduces the loss and improves the efficiency. According to different state detection time periods, the comparator inside the microcontroller is multiplexed by time-sharing, which saves hardware resources, reduces circuit cost and debugging difficulty.
Owner:SOUTHEAST UNIV
Networked train broadcasting system and implementation method
PendingCN111082886ASimple structureReal-time online monitoringError preventionBroadcast specific applicationsIp addressEngineering
The invention discloses a networked train broadcasting system and an implementation method, and belongs to the technical field of urban rail transit vehicles and motor train units. A full Ethernet topology is adopted and is matched with a digital multimedia terminal. The POE power supply IEEE 802.3 af / at technology is adopted for the low-power-consumption terminal device. The switch adopts a dynamic host configuration protocol DHCP to automatically allocate the IP address of the terminal device. A VoIP technology is adopted to realize visual digital intercom. Based on a gigabit Ethernet communication technology, an embedded processor is used as a core, a full Ethernet topology, a digital multimedia terminal and an integrated control host are adopted, three subsystems are integrated with the Ethernet, and terminal device uses a POE power supply and DHCP technology.
Owner:北京华高世纪科技股份有限公司
Small two-stroke four-cylinder horizontally-opposed aero-engine
PendingCN108661793ACompact structureHigh mechanical strengthCasingsMachines/enginesAviationControl system
The invention relates to a small two-stroke four-cylinder horizontally-opposed aero-engine compact and simple in structure, high in mechanical strength, wide in environment applicability, small in weight, high in efficiency and reliably, good in manufacturability and high in adaptability. According to the small two-stroke four-cylinder horizontally-opposed aero-engine, the manufacturing and debugging difficulty of an air door control system is simplified, the lubrication condition of a two-stroke engine crankshaft mechanism is effectively improved, and the problem about cooling during runningof a crank connecting rod motion pair is solved. The small two-stroke four-cylinder horizontally-opposed aero-engine meets the aviation high-strength flight requirement through a crankshaft, a connecting rod, a piston, a cylinder and a crankshaft box structure, and continuous cruising running for 10 h can be achieved at the altitude of 3,500 m or above under the work condition of 5,000 r / min.
Owner:XIAN AISHENG TECH GRP +1
Radio frequency chain of rubidium frequency scale
ActiveCN103326718ASimple structureReduce power consumptionPulse automatic controlPhase noiseFrequency multiplier
The invention discloses a radio frequency chain of a rubidium frequency scale. A direct digital synthesizer is respectively connected with a voltage controlled crystal oscillator and an acoustic surface wave filter, a radio-frequency amplifier is connected with the acoustic surface wave filter and a phase step diode, a frequency divider is connected with the voltage controlled crystal oscillator, and a single chip microcomputer is connected with the direct digital synthesizer. The output of the 60MHz voltage controlled crystal oscillator is divided into two ways, one way of the output is given to the direct digital synthesizer as a clock signal, and the other way of the output passes through the frequency divider and outputs a 10MHz signal as an output signal of the rubidium frequency scale. A low phase noise reference clock phase locking frequency multiplier is integrated in a chip of the direct digital synthesizer. One way of the output of the 60MHz voltage controlled crystal oscillator passes through the 16 frequency multiplication of a phase-locked loop in the direct digital synthesizer to be a 960MHz clock signal, the 960MHz clock signal is taken as the reference, and the direct digital synthesizer outputs a 179.86MHz signal with square wave modulation. The radio frequency chain is simple in structure, high in integration degree, good in power stability, easy to debug, low in power consumption and low in cost, and has proper phase noise.
Owner:武汉中科坤德科技有限公司
Method for software development of an embedded single chip microcomputer and a storage medium
ActiveCN109358839AFast constructionSimplify development difficultySoftware designComputer architectureTemplate design
The invention discloses a software development method and a storage medium of an embedded single-chip microcomputer, which is used for providing a method for rapidly developing the logic function of an embedded single-chip microcomputer product, and simplifying the difficulty of software application development of the single-chip microcomputer. Lua script is introduced into the development of single chip microcomputer, the functions of the product to be developed are divided into two subsystems: business application subsystem and chip general function subsystem, The general function subsystemcontrols the hardware interface, the business application subsystem uses Lua programming to realize the specific function logic of the product, and the business application subsystem calls the generalfunction subsystem through the abstract interface to control the hardware equipment to realize the complete business function. Because the business application logic is basically independent of hardware, the development and debugging of Lua script business logic subsystem can be carried out directly on PC. Also can carry on the standardization to the service logic interface, the template design,the fast construction conforms to the demand the service application program, reduced the single chip microcomputer development difficulty, enhanced the efficiency.
Owner:SHENZHEN TCL NEW-TECH CO LTD
Extraction zero-point micro-strip filter
InactiveCN109346805AHigh out-of-band rejectionSimplify design difficultyWaveguide type devicesTransmission zerosOut of band rejection
The invention discloses an extraction zero-point micro-strip filter. One or more extraction zero-point units are arranged on input and output resonators of a parallel coupling line micro-strip filteror any one stage of resonator in the middle. Compared with the prior art, the extraction zero-point micro-strip filter has the beneficial effects that the parallel coupling micro-strip filter which can flexibly design transmission zero points through single coupling to improve out-of-band rejection, and can lower design and debugging difficulty is provided; by virtue of the extraction zero-point units, the transmission zero setting is quickly and flexibly achieved on the basis that the topological structure of the filter is not changed; and by adoption of the method provided by the invention,the out-of-band rejection of the micro-band filter is improved, and meanwhile, the design and debugging difficulty of the filter is simplified.
Owner:SOUTHWEST CHINA RES INST OF ELECTRONICS EQUIP
Cable-equipped waveguide component with small-size tail part
InactiveCN105846027AEasy loadingDifficulty of SimplificationCoupling devicesMiniaturizationEngineering
The invention discloses a cable-equipped waveguide component with a small-size tail part. The cable-equipped waveguide component comprises a waveguide tube and a cover plate which is fixedly connected with one end of the waveguide tube through screws. The waveguide tube has a rectangular structure, the internal part is provided with steps, and the steps are provided with blind holes. The center of the cover plate is provided with a through hole which is internally provided with position limiting steps. The external end of the through hole is provided with chamfers. A cable is welded in the through hole of the cover plate. The cable and the cover plate are welded. Connection and fixing of the waveguide tube are performed through the screws so that assembling is simplified. The position limiting steps are arranged in the through hole of the cover plate so that the cable-equipped waveguide component has great weldability and accurate position limiting. The external end of the through hole is provided with the chamfers so that installation of the cable is facilitated, assembling difficulty and debugging difficulty of the conventional waveguide cable component can be simplified, the number of processing components can be reduced, miniaturization of the product can also be realized, and operation is simple and convenient and the performance is stable and reliable.
Owner:XIAN ELITE ELECTRONICS IND
Rapid fault detection method and detection system
ActiveCN107390069ASimplify debugging difficultyReduce the number of dockingElectrical testingInformation technology support systemEngineeringCable harness
The invention discloses a rapid fault detection method and detection system, so that a fault of a to-be-detected product is detected rapidly. The to-be-detected product is formed by connection of an electronic cabin and a position marker by a connection wiring harness; and the position marker is provided with an X1 wiring terminal plate for welding of the connection wiring harness. The detection method comprises: an auxiliary device for generating a reference signal is placed on a test stand; a signal ground wire of the auxiliary device is fixed on a to-be-tested product; the auxiliary device is provided with a signal output probe, the signal output probe is in contact with the X1 wiring terminal plate, and a signal acquisition system collects a static map of the to-be-tested product; if the static map is normal, a fault is located at the position marker; and if the fault still exists, the fault is located at the electronic cabin. With the method disclosed by the invention, the trouble elimination efficiency is improved; and the hidden damage on the connection wiring harness caused by repeated docking is reduced, so that the product reliability is improved.
Owner:XIAN NORTH ELECTRO OPTIC TECH DEFENSE
Automatic alignment correction mechanism of COF punching die
ActiveCN109895184ALow machining accuracy requirementsSimplify debugging difficultyMetal working apparatusPunchingReciprocating motion
The invention discloses an automatic alignment correction mechanism of COF punching. The automatic alignment correction mechanism of the COF punching comprises a mold correction platform unit and a visual camera alignment unit, wherein the mold correction platform unit comprises an XYZ axis correction assembly, the COF punching is installed on the XYZ axis correction assembly and is driven by theXYZ axis correction assembly to do reciprocating motion along the X axis, the Y axis and / or the Z-axis, the XYZ axis correction assembly and the visual camera alignment unit are installed on a rack correspondingly, and the visual camera alignment unit moves to or moves apart from a position of photographing a COF coiled material in the COF punching under the driving of a movement driving assembly.According to the automatic alignment correction mechanism, the precision of a COF punching product can be improved, the mold correction platform unit and the visual camera alignment unit are used forcarrying out calibration on the relative positions of the COF punching and the COF coiled material, and the precision of the COF punching product is improved.
Owner:SHENZHEN COMWIN AUTOMATION TECH
Hydraulic type mould pressure system
ActiveCN107020327ASimplify debugging difficultySimple structureShaping toolsPressure systemAgricultural engineering
The invention discloses a hydraulic type mould pressure system. The hydraulic type mould pressure system comprises an upper mould base and a lower mould base; a hydraulic rod and a cooperatively used piston rod are arranged between the upper mould base and the lower mould base; a hydraulic mechanism is arranged below the upper mould base; transmission air cylinders are symmetrically arranged below the hydraulic mechanism; each transmission air cylinder is connected with a synchronous module; a mould punch is arranged on the synchronous module; a material popping device connected with the hydraulic mechanism is arranged at the middle part of each mould punch; a lower mould used cooperatively with the mould punch is arranged on the lower mould base. The hydraulic type mould pressure system is simple in structure, realizes constant, adjustable and quantitative management of pressure, simplifies the mould adjusting difficulty, and meets the actual use requirement.
Owner:CHUZHOU MODERN MOLD MFG
Multi-shaft four-stator-rotor series ultrasonic motor
PendingCN114884395AImprove working conditionSimplify debugging difficultyPiezoelectric/electrostriction/magnetostriction machinesElectric machinesClassical mechanicsElectric machinery
The multi-shaft four-stator-rotor series connection ultrasonic motor comprises a shell, a front stator base is installed at the front end of the shell, and a rear stator base is installed at the rear end of the shell; a first stator-rotor series assembly and a second stator-rotor series assembly are sequentially arranged between the front stator seat and the rear stator seat, and the first stator-rotor series assembly and the second stator-rotor series assembly are coaxially arranged on the shell; the first stator-rotor series assembly and the second stator-rotor series assembly are respectively provided with a first output shaft and a second output shaft which are independent; the first output shaft and the second output shaft are connected through a spline; a PCB, a PCB cover shell and a cable fixing sleeve are arranged on the plane of one side of the shell, flexible printed boards on the first stator and rotor series assembly and the second stator and rotor series assembly are led out and then welded to the PCB, and finally wires are led out from the PCB in a unified mode. According to the invention, the independent stator and rotor series assemblies are adopted to output torque and rotating speed together, the structure is compact, and the motor has the advantages of large output torque, large power and simple assembly and debugging.
Owner:NUAA SUPER CONTROL TECHNOLOGY CO LTD
New 8-shaped combination cable
InactiveCN101645331AReduce transmission lossReduce weightCommunication cablesFlat/ribbon cablesBase stationPhotoelectric conversion
The invention discloses a new 8-shaped combination cable used for transmitting the communication signal of TD-SCDMA base station to a launch tower top, comprising an optical cable, a electric power cable and a woven cable which are coated in an outer sheath with the section being 8-shaped; the optical cable and the electric power cable are coated in a first sheath unit of the outer sheath; the woven cable is coated in a second sheath unit of the outer sheath; the first sheath unit and the second sheath unit are all in a shape of round tube and form the outer sheath with the 8-shaped section asa whole; the electric power cable connection is positioned on the power port of photoelectric conversion device of the launch tower top, and the optical cable connects the signal input end of the photoelectric conversion device. The new eight-shaped combination cable of the invention transmits by adopting the optical cable. The optical cable has small transmission loss, light product weight, lowcost and convenient and flexible use, enables the distance between antennae and a machine room to be farther, and is beneficial for the construction of distributed base station.
Owner:JIANGSU TRIGIANT TECH
Man-machine interaction method, device and equipment and readable storage medium
ActiveCN111090733AReduce development difficultyAvoid duplicate creationText database queryingSpecial data processing applicationsBusiness logicData science
The embodiment of the invention discloses a human-computer interaction method, device and equipment and a readable storage medium. The method comprises the steps: carrying out the multi-intention understanding of input information after the input information is obtained, and obtaining a plurality of intention understanding results; determining a target intention according to the plurality of intention understanding results; calling a target sub-process corresponding to the target intention to respond to the input information; wherein the target sub-process is one sub-process in the plurality of sub-processes; wherein intentions corresponding to different sub-processes are different. According to the embodiment of the invention, the method comprises the steps: carrying out the processing, dividing a conversation process into a plurality of sub-processes according to intention; each sub-process is only responsible for the service logic related to the corresponding intention, so that a developer only needs to pay attention to the service logic related to the sub-process during development, a plurality of developers can develop different sub-processes at the same time, the developmentdifficulty of the developer is greatly reduced, and the debugging and design difficulty is simplified. Meanwhile, the developed sub-process can be reused, so that developers are prevented from repeatedly creating similar functions.
Owner:IFLYTEK CO LTD
Aligning system used for photolithography equipment
ActiveCN100587608CSimplify design difficultySimplify debugging difficultyPhotomechanical exposure apparatusMicrolithography exposure apparatusLithographic artistPhase grating
The invention discloses an alignment system applied in a lithography device, which uses three periods phase grating with crude precision combination in a substrate marker or a substrate station reference marker, uses a first order diffraction light of the three periods as an alignment signal, simultaneously realizes a big capture range and gets high alignment precision, gets labeled deformation information and other useful information, and through the optimum design of the match and / or the layout of the three periods, the influence on an alignment position by asymmetrical deformation of the marker is effectively reduced.
Owner:SHANGHAI MICRO ELECTRONICS EQUIP (GRP) CO LTD
Preparation method of humidity sensitive grating and fiber grating temperature and humidity sensor
The invention provides a preparation method of a humidity sensitive grating. The preparation method comprises the following steps: firstly, conducting hydrolysis and impurity removal on plant fibers to obtain a clean solution; conducting desugaring on the clean solution by a certain quantity of ketene or acetic anhydride; then under the action of acid, esterfying a hydroxyl functional group of cellulose to form an acetyl functional group; modifying the surface of the grating by a silane coupling agent so as to change hydroxyl on the surface of the grating into an amido group which is easy to bond with acetyl and comprises silane; cleaning and drying the grating of the amido group comprising silane, placing the grating into the solution of cellulose comprising acetyl to soak so as to form the humidity sensitive grating grafted with cellulose; finally, cleaning and drying the humidity sensitive grating and enabling the plant fibers on the surface of the grating to be connected mutually to form a coating layer. The invention further provides a fiber bragg grating temperature and humidity sensor prepared according to the preparation method of the humidity sensitive grating. The fiber bragg grating temperature and humidity sensor prepared according to the preparation method of the humidity sensitive grating can be simultaneously sensitive to temperature and humidity.
Owner:WUHAN FUHAN TECH
Wideband Signal Cancellation Method Based on Convex Combination Adaptive Filtering Algorithm
ActiveCN106559092BWide range of workEliminate work blind spotsTransmissionAdaptive filtering algorithmComputation complexity
The invention provides a broadband signal cancellation method based on convex combination self-adaptive filtering algorithm. The method comprises the following steps of (1) extracting a received composite signal via a front end radio frequency module and dividing the signal into IQ two orthogonal signals, (2) unstring and decelerating the IQ orthogonal signals, and dividing the orthogonal signals into 16 sub-modules, each of which is input by two paths, one path inputting a demodulation module, one path inputting a convex combination self-adaptive filtering module for signal cancellation, (3) generating a transmitting signal for a cancellation signal having a transmitting module, and dividing the transmitting signal into two paths, one path emitted by an antenna end for detection or relay communication and one path conducting waveform prediction for emission signal echo interference of a self-adaptive module referring signal fed back to a self-adaptive module, (4) repeating the step 2 and 3 until an error of mean square reaches a minimum value, and (5) outputting a self-adaptive cancellation result. Work performance of the self-adaptive filtering scheme under the broadband signal is improved, and misjudgment upon co-frequency signal can be eliminated; and calculation complexity is reduced and the method is easy to operate.
Owner:HARBIN ENG UNIV
An automatic alignment correction mechanism for cof punching gold
ActiveCN109895184BLow machining accuracy requirementsSimplify debugging difficultyMetal working apparatusReciprocating motionStructural engineering
The invention discloses an automatic alignment correction mechanism of COF punching. The automatic alignment correction mechanism of the COF punching comprises a mold correction platform unit and a visual camera alignment unit, wherein the mold correction platform unit comprises an XYZ axis correction assembly, the COF punching is installed on the XYZ axis correction assembly and is driven by theXYZ axis correction assembly to do reciprocating motion along the X axis, the Y axis and / or the Z-axis, the XYZ axis correction assembly and the visual camera alignment unit are installed on a rack correspondingly, and the visual camera alignment unit moves to or moves apart from a position of photographing a COF coiled material in the COF punching under the driving of a movement driving assembly.According to the automatic alignment correction mechanism, the precision of a COF punching product can be improved, the mold correction platform unit and the visual camera alignment unit are used forcarrying out calibration on the relative positions of the COF punching and the COF coiled material, and the precision of the COF punching product is improved.
Owner:SHENZHEN COMWIN AUTOMATION TECH
Fan-type air flow indicator
The invention discloses a fan-type air flow indicator, which comprises a transparent short pipe, flanges and a fan assembly, wherein the flanges are arranged at two ends of the transparent short pipe for connecting the transparent short pipe in an air pipeline; and the fan assembly is arranged inside the transparent short pipe for indicating the air flow state and the air direction. The operation is simple; the cost is low; defects in the prior art can be overcome; the problem of insufficient air suction or air exhaust balance at the tail end of an air gathering processing or ventilation system can be effectively solved; the system debugging, operating and maintaining difficulty is greatly simplified; the number of air valves and the number of flow meters can be reduced; and the pipeline system cost is saved.
Owner:SHANGHAI MUNICIPAL ENG DESIGN INST GRP
Thread trimming and presser foot lifting mechanism and sewing machine
ActiveCN106637735BSolve the problem of temperature riseImprove vibration and noise characteristicsNeedle severing devicesSewing-machine control devicesElectric machineEngineering
The invention discloses a trim thread, a lifting foot pressure mechanism and a sewing machine, belonging to the technical field of the sewing machine. The trim thread and the lifting foot pressure mechanism resolve the problems in the former sewing machines including the complex structure and the loud noise in an operation. The trim thread and the lifting foot pressure mechanism comprise an electrical machine. The driving parts are fixed in an output shaft of the electrical machine. The driving parts are provided with a driving part one and a driving part two. The driving part one and the driving part two are arranged on the both sides of the axis of electrical machine. The mechanism comprises a lifting foot pressure module and a trim thread module located on the first rotation direction of the electrical machine. The driving part one is linked with the lifting foot pressure module located on the second rotation direction of the electrical machine. The driving part two is linked with the trim thread module. The former two power elements are replaced with one electrical machine in the mechanism. The mechanism has the advantages of simplifying the structure as well as reducing the operating noise of the sewing machine.
Owner:JACK SEWING MASCH CO LTD
Adaptive synchronous rectification control system and control method for active clamp flyback converter
ActiveCN109067181BImprove adaptive adjustment abilityReduce oscillationEfficient power electronics conversionDc-dc conversionMicrocontrollerSignal processing circuits
The invention discloses an adaptive synchronous rectification control system and a control method of an active clamp flyback converter; the control system includes a sampling and signal processing circuit, a control circuit with a microcontroller as the core and a gate driver; the control method can Realize the direct detection of the on-state, early-off, late-off, and just-off states of the synchronous rectifier on the secondary side of the active clamp flyback converter, and can control the accurate turn-on of the synchronous rectifier and the next step according to the detection results The conduction time of the synchronous rectifier in the cycle. After several cycles of self-adaptive control, the synchronous rectifier enters the exactly off state, which avoids the oscillation of the output waveform of the active clamp flyback converter, reduces the loss, and improves the efficiency; according to different state detection time periods, it is divided into The comparator inside the microcontroller is multiplexed in time, which saves hardware resources and reduces circuit cost and debugging difficulty.
Owner:SOUTHEAST UNIV
Dynamic cascade predictive control method for ocean direct-drive permanent magnet synchronous wind power converter
ActiveCN113315385ASimplify the design processSimplify debugging difficultyElectronic commutation motor controlVector control systemsPower qualityTarget control
According to a dynamic cascade predictive control method based on a current error threshold value, different control targets are subjected to priority ranking according to the importance degree, then multi-target control is achieved in the mode that switching vectors are screened according to the priority sequence, so that the problem that a traditional model is numerous in control right coefficient and complex in debugging, and the problems of multi-target mixing and priority confusion are solved. According to the method, the number of the switching vectors screened by a first-stage current controller is automatically adjusted through current error calculation, and the problem of poor control performance of a lower-priority target caused by the fixed screening switching vectors in traditional cascade prediction control is solved. In addition, the method also improves the effect of first-stage current control, and improves the grid-connected power quality of a permanent magnet synchronous fan. The method has a wide application prospect in the field of wind power integration.
Owner:SHANDONG UNIV
An all-digital active sonar transmitter and sonar generation method
InactiveCN105548992BSave D/A conversion processSimplify complexityWave based measurement systemsLow-pass filterTransmitted power
The invention discloses an all-digital active sonar transmitter, including a control center and a plurality of power amplification assemblies. The control center integrates a signal generator, a D-class power amplification controller and a serial communication module, and has functions of waveform storage, transmitting power control, transmitting beam formation, PWM waveform generation and dead zone control. Each power amplification assembly comprises a drive circuit, an H bridge, a low pass filter and a matching network. The all-digital active sonar transmitter utilizes a digital delay line to realize transmitting beam formation, data are compared with a counter after offset, a PWM waveform is generated, and dead zone time of the PWM waveform can be adjusted precisely on line in real time. According to the all-digital active sonar transmitter provided by the invention, complexity and debugging difficulty of a transmitter structure are simplified, and anti-interference performance and reliability of a system are improved.
Owner:TIANJIN POLYTECHNIC UNIV +1
Preparation method of humidity sensitive grating and fiber bragg grating temperature and humidity sensor
The invention provides a preparation method of a humidity sensitive grating. The preparation method comprises the following steps: firstly, conducting hydrolysis and impurity removal on plant fibers to obtain a clean solution; conducting desugaring on the clean solution by a certain quantity of ketene or acetic anhydride; then under the action of acid, esterfying a hydroxyl functional group of cellulose to form an acetyl functional group; modifying the surface of the grating by a silane coupling agent so as to change hydroxyl on the surface of the grating into an amido group which is easy to bond with acetyl and comprises silane; cleaning and drying the grating of the amido group comprising silane, placing the grating into the solution of cellulose comprising acetyl to soak so as to form the humidity sensitive grating grafted with cellulose; finally, cleaning and drying the humidity sensitive grating and enabling the plant fibers on the surface of the grating to be connected mutually to form a coating layer. The invention further provides a fiber bragg grating temperature and humidity sensor prepared according to the preparation method of the humidity sensitive grating. The fiber bragg grating temperature and humidity sensor prepared according to the preparation method of the humidity sensitive grating can be simultaneously sensitive to temperature and humidity.
Owner:WUHAN FUHAN TECH
an electronic device
ActiveCN104934706BMaintenance of DesignsSave spaceSimultaneous aerial operationsAntenna equipments with additional functionsCapacitanceResonance
Owner:HUAWEI DEVICE CO LTD
Intelligent digital display angle sensor
InactiveCN102878972AEliminate risk of damageEasy to operateMeasurement devicesRemote controlDisplay device
The invention discloses an intelligent digital display angle sensor. The angle sensor comprises a high sensitivity angle sensing chip, an embedded industrial microprocessor, a pulse width modulation and control module, a digital display and an infrared remote control. The intelligent digital display angle sensor is characterized in that the microprocessor is connected with the angle sensor, the pulse width modulation and control module and the digital display, and is in wireless communication connection with the infrared remote control. The microprocessor outputs signals in the form of pulse width modulation signals in real time, and outputs voltages of 0-10V, 0-5V and + / -5V, 4-20mA current, and serial digital communication respectively through an analogue voltage output port, a current output port and a serial communication port. The three types of output signals can be used as control source input signals for industrial control application; and the infrared remote control is used for controlling field application of the angle sensor in a non-contact way in real time. The angle sensor can be widely applied to multi-unit synchronous control in fields of textile, paper making, leather, cable and iron and steel.
Owner:SHANGHAI UNIV
Broadcasting television receiver-transmitter monitoring method based on single chip computer and monitoring system thereof
InactiveCN101527866AImprove anti-interference abilityAccurate data collectionTelevision systemsMicrocontrollerTelevision receivers
A broadcasting television receiver-transmitter monitoring system based on a single chip computer comprises a single chip computer and is characterized by also comprising an asynchronous receiving and transmitting module, a monitoring and collecting module, a storage module, a man-machine conversation module, an electrically controlled attenuator and a switching quantity control module, wherein the asynchronous receiving and transmitting module is connected with the single chip computer, and the monitoring and collecting module is connected with the single chip computer by an A / D converter module; the man-machine conversation module is connected with the single chip computer, and the electrically controlled attenuator is connected with the single chip computer by a D / A converter module; the switching quantity control module is connected with the single chip computer by a flip-latch; and the single chip computer is internally integrated with the A / D converter module, the D / A converter module and the storage module. The invention supplies various parameter monitoring, outputs multipath analog control quantity and switching control quantity, has a good man-machine conversation platform, memories the last operation capacity during breaking off, well communicates with a host computer and a lower computer, has a warning and error-reporting function and achieves remote monitoring by sending messages.
Owner:NANJING SAIGEW MICROWAVE SCI & TECH
A hydraulic mold pressure system
ActiveCN107020327BSimplify debugging difficultySimple structureShaping toolsPressure systemAgricultural engineering
The invention discloses a hydraulic type mould pressure system. The hydraulic type mould pressure system comprises an upper mould base and a lower mould base; a hydraulic rod and a cooperatively used piston rod are arranged between the upper mould base and the lower mould base; a hydraulic mechanism is arranged below the upper mould base; transmission air cylinders are symmetrically arranged below the hydraulic mechanism; each transmission air cylinder is connected with a synchronous module; a mould punch is arranged on the synchronous module; a material popping device connected with the hydraulic mechanism is arranged at the middle part of each mould punch; a lower mould used cooperatively with the mould punch is arranged on the lower mould base. The hydraulic type mould pressure system is simple in structure, realizes constant, adjustable and quantitative management of pressure, simplifies the mould adjusting difficulty, and meets the actual use requirement.
Owner:CHUZHOU MODERN MOLD MFG
Focusing and leveling device
ActiveCN103064264BSimplify design difficultySimplify debugging difficultyPhotomechanical exposure apparatusMicrolithography exposure apparatusGratingLithographic artist
A focusing and leveling device for a projection lithography machine comprises a lighting system, an imaging system and a detection system. The device is characterized in that a lighting grating in the lighting system and a reference grating in the imaging system are both stepped grating with height difference. The invention adopts a stepped-type focusing mark; the grating is installed on a stepped prism or a stepped mirror bracket; and at the same time, the reference grating also employs a stepped mark. Thus, design and debugging difficulty of an optical system can be simplified.
Owner:RAINBOW SOURCE LASER RSLASER
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