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33results about How to "Large measurable range" patented technology
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Laser distance measuring device
ActiveCN102278974AReduce the impactImprove stabilityOptical rangefindersOptical elementsLaser rangingOptoelectronics
The invention provides a laser ranging apparatus. The apparatus comprises: a laser module for generating a collimated detection beam; a receiving objective lens for receiving a reflected beam of the detection beam, wherein the receiving optical axis of the receiving objective lens is parallel to the emergent optical axis of the detection beam; a photoelectric converter for carrying out photoelectric conversion for an image generated by the reflected beam on a focal plane of the receiving objective lens, wherein a sensitization surface of the photoelectric converter is positioned on the focal plane of the receiving objective lens; a control and analysis system connected with the laser module and the photoelectric converter, wherein the size of the sensitization surface of the photoelectricconverter matches with the size of the imaging light spot of the receiving objective lens. According to the present invention, influence on effective light signals due to daylight and noise is reduced, such that the effective light signals are stood out from the background light; by using the photosensitive element with the small sensitization surface, and the small imaging light spot, the weak light signal reflected from the distant place can be aggregated at a maximum, therefore, with adopting the laser ranging apparatus under the sunlight, the ranging capability can be effectively enhanced, and the ranging range is further far.
Owner:NANJING CHERVON IND
Array type annular electrostatic sensor and pneumatic transmission powder measurement device and method
InactiveCN104316779AReal-time monitoring speedReal-time monitoring of traffic informationBulk conveyorsElectrostatic field measurementsMeasurement deviceMotion parameter
The invention relates to an array type annular electrostatic sensor and a pneumatic transmission powder measurement device and method. The array type annular electrostatic sensor comprises a tubular metal body, at least one set of first metal electrodes and at least one set of second metal electrodes are sequentially arranged on the inner circumferential face of the tubular metal body in a winding mode side by side, the first metal electrodes and the second metal electrodes are annular, and the axial width of the first metal electrodes is smaller than the axial width of the second metal electrodes. The invention further relates to the pneumatic transmission powder measurement device and method based on the sensor. By means of the method, main motion parameters of powder are monitored in real time under the condition that flowing of the powder is not interfered, the measurable range is large, the service life of the sensor is long, installation and maintenance are convenient, and the sensor can be widely used in industrial processes with the pneumatic transmission powder.
Owner:BEIJING ENLANDAR TECH
Real-time detecting method for sucrose content and online detecting method therefor
This invention relates to sugar content real time test method micro processor by impulse excitation signal by 50 to 10kH to test sugar liquid or sugar content with different of test object content with different resistance and voltages to get sugar content. This invention method is free from biological electrical field attuning change impact by use of random measurement method to exert different frequency impulse signals to improve test accuracy.
Owner:GUILIN UNIV OF ELECTRONIC TECH
Measuring instrument for film residual stress of flexible transparent substrate
ActiveCN105806531AIncrease area powerLarge measurable rangeUsing optical meansApparatus for force/torque/work measurementMeasuring instrumentLight spot
The invention provides a measuring instrument for film residual stress of a flexible transparent substrate. The measuring instrument comprises an optical platform, a first supporting rod, a light path system, a laser source system, a sample supporting system and a light spot tracking three-dimensional moving system. The laser source system and the light path system are fixed on the first supporting rod. The first supporting rod is fixed on the optical platform. The light spot tracking three-dimensional moving system and the sample supporting system are respectively arranged on the edges at two sides of the optical platform. The measuring instrument is capable of measuring the film stress of a flexible and transparent substrate with a relatively small curvature radius, the curvature radius is accurately measured by a single light beam optical lever method, a laser source is firstly focused to improve the unit area power of light spots, a three-point positioning method is utilized to fix the sample so as to ensure the relative initial positions in front and at the back of a long film, the measurable range of light spot deviation is greatly increased by the light spot tracking system, and the film residual stress is finally obtained by a corrected Stoney formula.
Owner:SHANGHAI UNIV
Automatic acquisition device for concrete gas permeation flow
ActiveCN106644888AInstantaneous flow measurement in real timeLarge measurable rangeVolume flow measuring devicesPermeability/surface area analysisElectricitySolenoid valve
The invention relates to an automatic acquisition device for concrete gas permeation flow. The automatic acquisition device is characterized by comprising one or more flow acquisition systems, each flow acquisition system comprises one or more gas permeation flow measuring pipeline and a controller; two ends of each gas permeation flow measuring pipeline are connected with a gas inlet and a gas outlet in parallel, a solenoid valve and a flow meter are sequentially arranged on each gas permeation flow measuring pipeline, each solenoid valve and each flow meter are electricallyconnected with the corresponding controller, each controller is further electrically connected with a computer, and the computer acquires gas permeation flow data through the controllers, judges the gas permeation flow state according to gas permeation flow data and a preset gas stable flow criterion and controls opening or closing of corresponding gas permeation flow measuring pipelines through the controllers. The automatic acquisition device can be widely applied to fields of test research of gas permeability of cement-based pore materials and the like as well as actual durability engineering detection.
Owner:TSINGHUA UNIV
Automatic testing method and system for DNS monitoring service
ActiveCN106649099AImprove test efficiencyHigh precisionSoftware testing/debuggingTest proceduresAutomatic testing
The invention relates to an automatic testing method and system for DNS monitoring service. The method comprises the steps of step 1 designating IP and ports of the to-be-tested services and to-be-tested DNS server, step 2, according to test use cases, differentiating different test scenarios and writing test use case files, step 3, according to use case files, writing configuration files of monitoring items to designate the monitoring scenarios to each use case, step 4, according to the configuration files of each use case, writing the corresponding anticipated result files, step 5, through an automatic test procedure, running the test use cases one by one, sending query packages to the to-be-tested DNS server, comparing feedback results with the anticipated results, step 6, after all the use cases are run, generating a test report based on the comparison results obtained in step 5. The automatic testing method and system for DNS monitoring service can save the cost of manual test, reduce the risks of manual mistakes, and achieve the fast, reliable and automatic tests of DNS monitoring service system.
Owner:CHINA INTERNET NETWORK INFORMATION CENTER
Device and method for fast detecting PSA prostate specific antigen
InactiveCN101294932AGood choiceImprove accuracyMaterial electrochemical variablesElectrochemical responseTrace Amounts
The invention relates to a device and method used for fast measuring PSA prostate specific antigen, and is characterized in that the invention comprises the following steps: the signal output of an electrochemical reaction tank (1) a working electrode of which is coated with Rul and an anti-PSA thin film is connected with the signal input of a voltammeter (2); the signal output of the voltammeter (2) is connected with the signal input of a signal collecting device (3); the output of the signal collecting device (3) is connected with the signal input of a signal processing device (4); the invention also discloses the method, has simple equipment, good selectivity and accuracy, easy realization of on-line detection and mass detection, high measuring precision which can realize the detection of trace amount PSA in blood serum, no problem of radiation protection and pollution prevention, wider measuring range and low cost.
Owner:NINGBO UNIV
Sugar cane crystallization supersaturation microwave induction on-line detection method and detector
InactiveCN101059453AEasy to useCompact useMaterial analysis using microwave meansCapacitanceDisplay device
The invention relates to a microwave sensitive online detect method and a relative detector on the cane juice crystallization super-saturation degree. The invention uses a cane juice saturation sensitive inductance winding in 8-shape or dual-6 shape to connect a microwave signal excite circuit, wherein the winding can change resistance along with the capacitor and inductance change of around medium, to change the microwave frequency generated by the microwave signal excite circuit. The excite circuit is compacted with the outer wall of a boiling pan, to check the change of microwave frequency, to obtain the super-saturation of cane juice. The detector comprises a microwave signal excite circuit, a microwave frequency check and voltage convert circuit, a microprocessor, a power supply and a display. The microprocessor stores the relation between the microwave frequency electric parameter signal and cane juice crystallization saturation, to directly output the cane juice crystallization super saturation degree according to the microwave frequency. The inventive method and the detector can non-contact detect the cane juice un-saturation degree in the boiling pan, with simple application, strong interference resistance, high measurement accuracy and wide measuring range.
Owner:GUILIN UNIV OF ELECTRONIC TECH
Adjustable surface-mounted packaged semiconductor device clamp and test method
ActiveCN111579956AReduce testing costsEasy to testMeasurement instrument housingIndividual semiconductor device testingDevice materialEngineering
The invention relates to an adjustable surface-mounted packaged semiconductor device clamp and a test method. The clamp comprises a first PCB substrate, a second PCB substrate, an adjustable connecting assembly, bases, reeds, a base contact pins, contact pins and elastic bands. Microstrip lines are arranged on the first PCB substrate and the second PCB substrate; the first PCB substrate and the second PCB substrate are respectively provided with a base; reeds are arranged on the two bases; the reeds are connected with microstrip lines through base contact pins, and the microstrip lines are connected with the contact pins; the first PCB substrate is connected with the second PCB substrate through the adjustable connecting assembly, and the relative position between the first PCB substrate and the second PCB substrate is changed by adjusting the adjustable connecting assembly, so that the relative position between the two bases is changed; pins on the two sides of a surface-mounted packaged semiconductor device to be tested are in contact with the reeds on the two bases respectively, and the surface-mounted packaged semiconductor device to be tested is bound to the two bases throughthe elastic bands, so that the pins and the reeds are tightly pressed.
Owner:SHANGHAI PRECISION METROLOGY & TEST RES INST
Real-time sucrose content detection method and device
InactiveCN102411009AFast measurementSimple and fast operationMaterial analysis using microwave meansData acquisitionElectromagnetic field
The invention relates to a real-time sucrose content detection method and device, and the method comprises the steps of placing an object to be detected in a high-frequency electromagnetic field and getting the sucrose content in the object to be detected according to the frequency change. A sucrose content detection sensor of the device is an excitation source circuit which can generate 600K-1MHz sine wave excitation signals, and the sucrose content detection sensor is connected with a data acquisition circuit and a micro-processor. The micro-processor stores a conversion program between sugar content and frequency change increment. The sensor approaches or contacts the outer skin of sugarcane and then the sucrose content in the detected object can be obtained. The device is further equipped with a solution sucrose content detection sensor which comprises an excitation source circuit capable of generating 1-6MHz sine wave excitation signals and a sucrose solution sample tube, and the sample tube is positioned at one end of an inductor coil of the excitation source circuit. The two sensors are connected with the data acquisition circuit via a two-way switch. The two-way switch is used for selecting the sensor to be used, and a selection button is used for selecting the detection mode of a function menu. All the parts of the device are mounted in a housing. By adopting the device and the method, the non-destructive real-time detection of sucrose content can be realized, the precision is high, the use is simple and convenient and the cost performance is high.
Owner:GUILIN UNIV OF ELECTRONIC TECH
Circuit structure for measuring single-particle transient pulse width
ActiveCN111487472AReduce overheadHigh measurement accuracyElectrical measurement instrument detailsElectrical testingHemt circuitsComputational physics
The invention discloses a circuit structure for measuring single-particle transient pulse width. The circuit structure comprises a control circuit, an attenuation unit, a delay unit, a drive buffer and a counting circuit. The control circuit is used for controlling the pulse to be transmitted to a cyclic structure formed by the circuit, the attenuation unit, the delay unit and the drive buffer after the single-particle transient pulse arrives. The attenuation unit is used for reducing the pulse width, and the delay unit is used for enabling the delay width of the cyclic structure to be largerthan the pulse width. The counting circuit uses the register and the adder to count the number of cycles of the pulse in the cycle structure, the clock signal of the register is provided by the pulsewithout additional provision, and the measurement result of the single event transient pulse width is the product of the amount of each cycle attenuation and the number of cycles. The realized circuitstructure is large in measurable range and high in measurement precision.
Owner:BEIJING MXTRONICS CORP +1
Multi-point aiming regional abnormal gas detection device
InactiveCN110887805AProduction of snap judgmentsQuickly determine the locationMaterial analysis by optical meansEngineeringMechanical engineering
The invention relates to a multi-point aiming regional abnormal gas detection device. The device comprises an outer reflector and a reference reflector, wherein the reference reflector comprises a shell, and a light emitter, a modulator for controlling the light emitter, a detection assembly and an inner reflector which are arranged in the shell, the inner reflector is mounted on the shell througha rotating shaft, and the rotating shaft drives the inner reflector to rotate to enable the detection device to be switched between a detection state and an internal reference state; when the detection device is in the internal reference state, emitted light emitted by the light emitter reaches the detection assembly through the internal reflector; when the detection device is in the detection state, emitted light emitted by the light emitter reaches the outer reflector through an emitting window in the shell, is reflected back to the reference reflector through the outer reflector, and enters the detection assembly through the receiving window in the shell. Compared with the prior art, the device is advantaged in that the device is simple in structure, excellent in performance, high in detection speed, easy to operate, large in measurable range, high in accuracy and the like.
Owner:SHANGHAI RES INST OF CHEM IND +1
Monitoring device and monitoring method for water content of coal powder and coal type on basis of multiple sensors
PendingCN106771047AIncreased sensitivitySolution to short lifeThermometers using electric/magnetic elementsFuel testingControl systemMultiple sensor
The invention belongs to the field of process parameter detection of a coal-fired power plant and particularly relates to a monitoring device and a monitoring method for water content of coal powder and the coal type on the basis of multiple sensors. The monitoring device consists of a measuring sensor probe, a signal processing unit, a data fusion unit and an output display unit, wherein the measuring sensor probe consists of metal electrodes and a temperature sensors arranged on a primary air pipeline of the coal-fired power plant, and is used for measuring the speed, electrostatic signals and temperature of primary air powder. Dynamic parameters and signal characteristics of the primary air powder outputted by the signal processing unit and production parameters of the power plant are comprehensively analyzed in the data fusion unit, then the water content of the coal powder and the changing condition of the coal type in the pipeline are obtained, are displayed and stored in the output display unit, and are uploaded to a power-plant control system. According to the monitoring device and the monitoring method, the structure is simple, the cost is low, the measurement is sensitive, the property is stable, the influence of severe environments is not easily caused, and real-time monitoring for the water content of the coal powder and the change of the coal type in the primary air pipeline of the coal-fired power plant can be realized.
Owner:NORTH CHINA ELECTRIC POWER UNIV (BAODING)
Three-dimensional displacement measuring sensor based on polymer fiber
ActiveCN109099848AIncrease or decrease optical power lossLarge measurable rangeUsing optical meansFiberOptical power meter
The invention discloses a three-dimensional displacement measuring sensor based on a polymer optical fiber, and is used for measuring displacements in three directions. The three-dimensional displacement measuring sensor comprises an X-axis direction, a Y-axis direction and a Z-axis direction, and each direction corresponds to a passive optical fiber. The passive optical fibers in the three directions are both twisted with the active optical fibers to form twisted fibers, and respective one section of each of the twisted fibers in three directions are fixed to the X-axis direction moving plate, the Y-axis direction moving plate and the Z-axis direction moving plate respectively, and the remaining parts are bent into a circle to form three macrobend coupling structures respectively. The macrobend coupling structure can couple the light in the active fiber into each passive fiber, so that the optical power meter corresponding to the end of the passive fibers can detect the light intensity. The increase in displacement of the moving plates in three directions reduces the bend radius of each macrobend coupling structure, so that the active optical fibers can couple more light to the passive optical fibers, the three optical power meters can detect the changes of light intensity, and the changes of displacement in three directions can be measured by converting the light intensity into a displacement.
Owner:ZHONGBEI UNIV
Fiber Bragg grating force sense sensor, robot and sensing measurement method of robot
ActiveCN105841721AMeet the use requirementsHigh precisionConverting sensor output opticallyGratingFiber Bragg grating
The invention relates to a fiber Bragg grating force sense sensor, a robot and a sensing measurement method of the robot. The fiber Bragg grating force sense sensor comprises a body; at least one inscription groove and optical fibers arranged in the inscription grooves are arranged on the surface of the body; inscription is performed on the optical fibers according to preset fiber Bragg grating parameters, so that at least one fiber Bragg grating can be formed; when the body is deformed under the action of an external force, the change amount of the preset fiber Bragg grating parameters and the change of the center wavelength of the fiber Bragg gratings are obtained; and the change amount of a preset measurement coefficient can be obtained according to the obtained change amount of the preset fiber Bragg grating parameters and change of the center wavelength of the fiber Bragg gratings. Since the fiber Bragg grating force sense sensor of the invention is based on optical fiber sensing, the defect of high possibility of being subjected to electric interference and electromagnetic interference of a traditional sensor can be eliminated. The fiber Bragg grating force sense sensor has the advantages of heat resistance, corrosion resistance and radiation resistance of an optical fiber sensor, small size, high precision and wide measurement range, and can meet the requirements of the static and dynamic characteristics of the feet, fingers and the like of the robot and bear large enough impact load.
Owner:CHINA GENERAL NUCLEAR POWER OPERATION +2
A method for measuring and warning the working distance of a crane lifting vehicle near potential
ActiveCN105301596BRealize distance measurement without dead angleReliable data referenceTransmission systemsAcoustic wave reradiationUltrasonic sensorCharged body
The invention belongs to the fields of high-voltage live-line safe work construction safety monitoring and wireless communication, and discloses a distance measuring and alarming method for potential approaching work of a crane lifting car. The method is characterized in that based on distance measurement, information wireless transmission and data fusion, the real-time accurate measurement of the distance from construction personnel and equipment to a charged body and safety alarming are realized, accidents such as an electric shock caused by close contact with the charged body are prevented, serious safety accidents such as property loss and personnel casualties are prevented, the level of construction safety is simultaneously increased, the maintenance efficiency is substantially improved, and the construction safety is enhanced. The distance measuring and alarming method for the potential approaching work of the crane lifting car is used for high-voltage live-line safe work construction safety monitoring, and measurement without blind angles is realized by multi-angle ultrasonic sensors; a WiFi hot spot wireless network is flexibly installed; in addition, a control room can obtain construction on-site information at any time, a distance measuring and safety alarming system is formed, and the safety distance measuring problem of high-voltage live-line safe work construction is fundamentally solved.
Owner:STATE GRID HUBEI ELECTRIC POWER CO LTD MAINTENANCE CO
Three-dimensional Displacement Measurement Sensor Based on Polymer Optical Fiber
ActiveCN109099848BIncrease or decrease optical power lossLarge measurable rangeUsing optical meansFiberOptical power meter
The invention discloses a three-dimensional displacement measuring sensor based on a polymer optical fiber, and is used for measuring displacements in three directions. The three-dimensional displacement measuring sensor comprises an X-axis direction, a Y-axis direction and a Z-axis direction, and each direction corresponds to a passive optical fiber. The passive optical fibers in the three directions are both twisted with the active optical fibers to form twisted fibers, and respective one section of each of the twisted fibers in three directions are fixed to the X-axis direction moving plate, the Y-axis direction moving plate and the Z-axis direction moving plate respectively, and the remaining parts are bent into a circle to form three macrobend coupling structures respectively. The macrobend coupling structure can couple the light in the active fiber into each passive fiber, so that the optical power meter corresponding to the end of the passive fibers can detect the light intensity. The increase in displacement of the moving plates in three directions reduces the bend radius of each macrobend coupling structure, so that the active optical fibers can couple more light to the passive optical fibers, the three optical power meters can detect the changes of light intensity, and the changes of displacement in three directions can be measured by converting the light intensity into a displacement.
Owner:ZHONGBEI UNIV
Real-time detecting method for sucrose content and online detecting method therefor
This invention relates to sugar content real time test method micro processor by impulse excitation signal by 50 to 10kH to test sugar liquid or sugar content with different of test object content with different resistance and voltages to get sugar content. This invention method is free from biological electrical field attuning change impact by use of random measurement method to exert different frequency impulse signals to improve test accuracy.
Owner:GUILIN UNIV OF ELECTRONIC TECH
Method for Measuring Acceleration of Hypersonic Target
ActiveCN106443614BEfficient extractionImprove accuracyWave based measurement systemsAcceleration factorComputation complexity
A hypersonic velocity target acceleration testing method is mainly used for solving the problems that the acceleration testing precision of the A hypersonic velocity target in the prior art is not high and the measurable scale is small. The method includes steps of (1) receiving echo data; (2) mixing treatment; (3) matched filtering; (4) phase difference of frequency domain; (5) structuring a spectrum coordinate matrix; (6) spectrum peak searching method; (7) calculating target acceleration; (8) outputting target acceleration to the system. By applying the frequency domain phase differential method, the acceleration factor in the echo signal phase can be effectively extracted, so that the method is high in accuracy and low in calculation complexity. By applying the spectral line searching method, the contradiction of acceleration fuzzy and maximum measurable acceleration can be effectively solved, thus the method has the advantage of big measurable zone. Through the treatment in the two-dimensional frequency domain, the invention is applicable to low signal-to-noise ratio.
Owner:XIDIAN UNIV
A test device for heat exchange tubes
ActiveCN112683711BLarge measurable rangeAvoid or mitigate lateral bendingNuclear energy generationInvestigating abrasion/wear resistanceMechanical engineeringMechanics
The invention discloses a test device for heat exchange tubes, comprising: a fixing mechanism, the fixing mechanism includes: a fixing frame, a first fixing seat and a second fixing seat, a first clamping component and a second clamping component; a balance component, It is used to connect two heat exchange tubes; the preload loading mechanism includes two preload loading units, each preload loading unit acts on a heat exchange tube respectively, and the two preload loading units are respectively arranged on the opposite side of the balance assembly. In the present invention, a rotating pair is formed between the slide rail and the first sliding block, which unloads the pre-tightening force generated when the heat exchange tube is tightened, so that the test experiment can be carried out smoothly; at the same time, the two heating tubes are fixedly clamped, and the The balance component is set between the heat exchange tubes, which avoids the interference of the force generated by the heat exchange tubes during the preloading of the test, and greatly reduces the error of the experiment.
Owner:ZHEJIANG UNIV OF TECH
Clamping device and fixing mechanism for heat exchange tube
ActiveCN112649289BLarge measurable rangeAvoid or mitigate lateral bendingNuclear energy generationHeat exchanger casingsMechanical engineeringPhysics
The invention discloses a clamping device and a fixing mechanism of a heat exchange tube, comprising: a first clamping assembly, used to clamp one end of the heat exchange tube; a second clamping assembly, used to fix the other end of the heat exchange tube ; the fixed frame; the first fixed seat and the second fixed seat, the first fixed seat and the second fixed seat respectively fix a first clamping assembly; the sliding seat, which is arranged on the fixed frame; the balance assembly, Used to connect two heat exchange tubes. In the present invention, in the clamping device, a rotating pair is formed between the slide rail and the first sliding block, which unloads the pre-tightening force generated when the heat exchange tube is tightened, so that the test experiment can be carried out smoothly; in the fixing mechanism, at the same time The two heat exchange tubes are fixedly clamped, and a balance assembly is set between the two heat exchange tubes, which avoids the interference of the force generated by the heat exchange tubes when they are pre-tightened on the experiment, and greatly reduces the error of the experiment.
Owner:ZHEJIANG UNIV OF TECH
Sugar cane crystallization supersaturation microwave induction on-line detection method and detector
InactiveCN100578203CEasy to useCompact useMaterial analysis using microwave meansCapacitanceDisplay device
The invention relates to a microwave sensitive online detect method and a relative detector on the cane juice crystallization super-saturation degree. The invention uses a cane juice saturation sensitive inductance winding in 8-shape or dual-6 shape to connect a microwave signal excite circuit, wherein the winding can change resistance along with the capacitor and inductance change of around medium, to change the microwave frequency generated by the microwave signal excite circuit. The excite circuit is compacted with the outer wall of a boiling pan, to check the change of microwave frequency, to obtain the super-saturation of cane juice. The detector comprises a microwave signal excite circuit, a microwave frequency check and voltage convert circuit, a microprocessor, a power supply and a display. The microprocessor stores the relation between the microwave frequency electric parameter signal and cane juice crystallization saturation, to directly output the cane juice crystallization super saturation degree according to the microwave frequency. The inventive method and the detector can non-contact detect the cane juice un-saturation degree in the boiling pan, with simple application, strong interference resistance, high measurement accuracy and wide measuring range.
Owner:GUILIN UNIV OF ELECTRONIC TECH
Atomic gyroscope axial azimuth angle measuring device and method based on double theodolites
The invention relates to an atomic gyroscope axial azimuth angle measuring device and method based on double theodolites. The atomic gyroscope axial azimuth angle measuring device comprises a reflecting mirror and a clinometer on an atomic gyroscope, a first theodolite on the normal of the reflecting mirror and a second theodolite on the normal of an optical flat, detecting a horizontal angle value alpha of the reflecting mirror, the first theodolite and the second theodolite and a horizontal angle value beta of the optical crystal, the second theodolite and the first theodolite, and calculating a horizontal included angle phi between the axial direction of the atomic gyroscope and the normal direction of the optical crystal according to the alpha and the beta; rotating the atomic gyroscope, correcting the inclination angle of the atomic gyroscope, and adjusting the first theodolite; detecting a horizontal angle value alpha'of the reflecting mirror, the first theodolite and the second theodolite and a horizontal angle value beta 'of the optical crystal, the second theodolite and the first theodolite after rotation, and calculating a horizontal included angle phi' between the axial direction of the atomic gyroscope and the normal direction of the optical crystal after rotation according to alpha 'and beta'; according to the method disclosed by the invention, the inclination angle rotation error of the rotary table is avoided, and the measurement precision is high.
Owner:HUAZHONG PHOTOELECTRIC TECH INST (CHINA SHIPBUILDING IND CORP THE NO 717 INST)
A dns monitoring service automated testing method and system
ActiveCN106649099BHigh test automation rateImprove test efficiencySoftware testing/debuggingTest proceduresAutomatic testing
The invention relates to an automatic testing method and system for DNS monitoring service. The method comprises the steps of step 1 designating IP and ports of the to-be-tested services and to-be-tested DNS server, step 2, according to test use cases, differentiating different test scenarios and writing test use case files, step 3, according to use case files, writing configuration files of monitoring items to designate the monitoring scenarios to each use case, step 4, according to the configuration files of each use case, writing the corresponding anticipated result files, step 5, through an automatic test procedure, running the test use cases one by one, sending query packages to the to-be-tested DNS server, comparing feedback results with the anticipated results, step 6, after all the use cases are run, generating a test report based on the comparison results obtained in step 5. The automatic testing method and system for DNS monitoring service can save the cost of manual test, reduce the risks of manual mistakes, and achieve the fast, reliable and automatic tests of DNS monitoring service system.
Owner:CHINA INTERNET NETWORK INFORMATION CENTER
A fiber grating force sensor, a robot and a sensing and measuring method thereof
ActiveCN105841721BMeet the use requirementsHigh precisionConverting sensor output opticallyGratingHeat resistance
Owner:CHINA GENERAL NUCLEAR POWER OPERATION +2
Optical fiber and GNSS-based high-precision wide-range three-dimensional deformation monitoring device
PendingCN109751967AAvoid breakingOvercome the problem of detection range limitationElectrical/magnetic solid deformation measurementUsing optical meansGratingMeasuring instrument
The invention discloses an optical fiber and GNSS-based high-precision wide-range three-dimensional deformation monitoring device. The device is characterized by comprising a GNSS reference station, an upper computer, a base plate, four GNSS receivers and an optical fiber interference measuring instrument; the base plate is provided with a central lead point and three peripheral lead points aroundthe central lead point; the three peripheral lead points and the central lead point are connected in a Y shape through an optical fiber and a grating sensor; an automatic length adjusting device usedfor adjusting the length of each side of the Y-shaped optical fiber is further arranged on the base plate; the four GNSS receivers are arranged at the center lead point and the three peripheral leadpoints respectively; the three peripheral lead points are connected with three interfaces of the optical fiber interference measuring instrument; and a reflecting device is arranged at the center leadpoint. The optical fiber and GNSS-based high-precision wide-range three-dimensional deformation monitoring device can perform three-dimensional measurement, and is high in measuring precision and wide in range.
Owner:THE UNIV OF NOTTINGHAM NINGBO CHINA
An underwater detection method for cooperative formation of unmanned ships
InactiveCN108681321BLow costLarge measurable rangePosition/course control in two dimensionsObstacle avoidanceShallow water area
The invention discloses an underwater detection method for coordinated formation of unmanned ships. The method specifically includes the following main processes: establish a grid map based on environmental information, conduct area coverage data detection after the unmanned ships are formed, search for the nearest uncovered area and plan a path when they fall into a blind spot or the round of coverage ends Arrive in this area to continue the task; at the same time, each unmanned ship has an obstacle avoidance function and a solution when the unmanned ship encounters obstacles. The invention uses a small unmanned ship for detection, which can pass freely in shallow water areas; the invention uses the unmanned ship formation method for detection, which can detect from different angles and overcome the misjudgment caused by the single unmanned ship itself and the angle limitation of the ultrasonic probe ; The present invention uses surface and underwater ultrasonic probes, and the range of obstacle avoidance is not limited to obstacles on the water surface, but also can detect underwater obstacles to avoid collisions caused by underwater reefs; when an unmanned ship breaks down suddenly, other The unmanned ship can re-plan to continue the mission.
Owner:SOUTH CHINA UNIV OF TECH
BGA (ball grid array) coplanarity measuring system based on projection Moire principle
ActiveCN102052907BIncrease contrastThe photoelectric characteristics will not be affected by temperatureUsing optical meansLiquid-crystal displayOptical table
The invention discloses a coplanarity measuring system based on the projection Moire principle, which comprises a cold light source (1), a collimating lens (3), CCD (charge coupled device) cameras (2, 4), an LCD (liquid crystal display) panel (5), a projection lens (6), an optical platform (7), a high-precision mobile station (8) and a computer (9), wherein the LCD panel (5) displays a strip pattern generated by the computer (9); the light emitted by the cold light source (1) is irradiated on the LCD panel (5) after passing through the collimating lens (3); the strip pattern displayed on the LCD panel (5) is projected to the surface of a reference plane or an object loaded to be measured on the high-precision mobile station (8); and two CCD cameras are symmetrically arranged at two sides of the LCD panel (5). The measuring area and the measuring precision of the coplanarity measuring system are increased, which can meet the demand of large-area, high-precision, quick and real-time measurement in current encapsulation test.
Owner:HUAZHONG UNIV OF SCI & TECH
An optical waveguide group refractive index testing device and method
ActiveCN110243572BImprove test accuracyLarge measurable rangeRefractive power measurementRefractive indexEngineering
The present application proposes a device and method for testing the refractive index of an optical waveguide group. The device includes: a plurality of microring test components, each of which includes a straight waveguide and a rounded rectangular waveguide, and the rounded rectangular waveguide Parallel to the straight waveguide and close to one side of the straight waveguide to form a directional coupler with the straight waveguide, the rounded rectangular waveguide is perpendicular to at least one side of the straight waveguide to set the waveguide to be tested, and the plurality of microrings The waveguides to be tested in the test components have different lengths, and the multiple microring test components are the same except for the waveguides to be tested in different lengths. The invention has the advantages of high testing precision, wide measurable range and the like.
Owner:ZHONGXING PHOTONICS TECH CO LTD
Grinding machine thickness measuring device and grinding machine
ActiveCN103433845BAchieve positioningHigh measurement accuracyGrinding feed controlPlane surface grinding machinesProgrammable logic controllerControl engineering
The invention provides a thickness measurement device of a scrubbing machine; and the device is high in accuracy and working efficiency. The invention also provides the scrubbing machine provided with the thickness measurement device. The scrubbing machine comprises a programmable logic controller (PLC), a brush roll, a brush roll fixing seat, a brush roll motor, a pressure adjusting box, a servo motor, a pressure regulating screw rod and the thickness measurement device, wherein the brush roll is driven to rotate by the brush roll motor; the servo motor can be used for adjusting the position of the brush roll fixing seat by controlling the threaded connection height between the pressure regulating screw rod and the pressure adjusting box; the thickness measurement device mainly comprises a thickness measurement rotating shaft, a thickness measurement rubber roll, a rotary encoder, a big synchronizing wheel and a small synchronizing wheel; when a base plate enters the position between the thickness measurement rubber roll and a lower carrier roller, the big synchronizing wheel and the small synchronizing wheel are driven to rotate by the thickness measurement rotating shaft; the rotary encoder connected with the small synchronizing wheel is used for transmitting the spin data into the PLC; the PLC is used for controlling the rotating speed of the servo motor and the brush roll motor. The scrubbing machine and the thickness measurement device of the scrubbing machine are applied to the processing field of a circuit board.
Owner:GOAL SEARCHERS ZHUHAI
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