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63results about How to "Easy to measure on site" patented technology
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Laser multiple degree-of-freedom measuring system and method
InactiveCN1439864AEasy to adjustReduce usageUsing optical meansLight polarisation measurementLaser transmitterLight beam
A multi-freedom laser measuring system is composed of laser emitter, polarizing-splitting unit, 4-freedom error sensing unit, photoelectric receiver unit and signal processing unit. Said 4-freedom error sensing unit consists of quater-wavelength wave plate, optical splitter and optical reflector. The laser beam is splitted into the perpendicular mutually linear polarized light beams in two polarizing directions. The light beam received by said 4-freedom error sensing unit is splitted to two beans received by two photoelectric receiver. The linearity error of an object in two directions and the pitch angle error can be obtained after signal processing.
Owner:BEIJING JIAOTONG UNIV
Rolling angle measurement method and device based on grating
The invention discloses a roll angle measuring method based on a grating and a device thereof, which belongs to the technical field of photoelectric detection. A laser lases and emerges directly, or emerges after collimation through a collimating lens; the light is directly incident on a one-dimensional plane transmission grating, or reversely incident on the grating through a retrodirective reflector; plus-minus first stage diffracted light from the grating is focused to form two diffracted light points through a lens; a photodetector is used to detect the variations in positions of the two focused light points, thus figuring out a roll angle. The optical structure of the device is compact and simple, and brings convenience to practice; in addition, the accuracy, the stability and the economical efficiency are also high. The grating is used as a sensitive device; error separation is achieved, and the interference-free feature is improved by using the differential measurement of double diffracted beams; few optical devices are used; and the power of the light source is low; the cost is low; mobile parts do not require to be provided with cables; the angle measurement distinguishability is as high as 0.5 and even higher; different requirements of measurement accuracy can be met just by replacing the grating with gratings having different numbers of lines.
Owner:BEIJING JIAOTONG UNIV
Automatic measuring device and method for fish type morphological parameters
The invention relates to the technical field of aquatic product index measurement and particularly relates to an automatic measuring device and method for fish type morphological parameters. The automatic measuring device comprises a computer, a framework main body (1), a live fish flow guide groove (2) which is obliquely formed on the framework main body (1) and a photographing device which is arranged at the lower end of the live fish flow guide groove (2) and is used for photographing a fish body image; the bottom of the live fish flow guide groove (2) is a transparent platform; the photographing device comprises a bracket (4) arranged on the framework main body (1) and an industrial camera (5) which is in sliding connection with the bracket (4); the industrial camera is in signal connection with the computer; the computer comprises a parameter setting module, a calibration module, an image acquisition module, a fish body size automatic extracting module and a fish body size manual measuring module which are in signal connection in sequence. With the adoption of the device and the method, the fish type morphological parameters can be rapidly acquired in a lossless mode.
Owner:NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
Method and device for simultaneously measuring five degrees-of-freedom errors based on light beam drift compensation
ActiveCN107228638AAchieving Photodrift CompensationAchieving Error SeparationUsing optical meansBeam splittingPrism
The invention provides a method and a device for simultaneously measuring five degrees-of-freedom errors based on light beam drift compensation. The method and the device are used for solving the problems of low measurement precision, small measurement range and poor anti-interference capability of the existing high-precision simultaneous measurement method for guide rail five degrees-of-freedom. A collimating lens, a prism assembly, a polarization beam splitting prism and a quarter-wave plate are arranged between a laser device and a right-angle prism plated with a beam splitting film, so as to realize processing of incident light and reflected light, information of the reflected light and transmitted light after beam splitting is received and measured by means of a four-quadrant detector and a position sensitive detector, and the measurement of pitch angle, deflection angle and rolling angle errors, horizontal straightness errors, vertical straightness errors and light drift compensation are realized. The method and the device utilize double beam differential measurement to realize error separation, enhance the anti-interference capability, employ few optical devices and are low in light source power and cost; the optical structure is simple, the operation is convenient, the moving parts are not required to be provided with cables, and the field measurement is facilitated; and the angle measurement resolution is high.
Owner:ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
High-power inductance testing device, main circuit thereof and testing method thereof
InactiveCN103018575ASimple structureEasy to measure on siteResistance/reactance/impedencePower flowControl circuit
The invention discloses a high-power inductance testing device which is small in volume, light in weight and low in cost. The device comprises a main circuit and a control circuit, wherein the main circuit comprises a precharging circuit and an inductance testing devicee, the control circuit mainly consists of a signal collection circuit and a main control chip minimum system, voltage sensors which are used for detecting inductance voltage are arranged at two ends of tested inductance, a current sensor which is used for detecting tested inductance current is arranged, voltage at two ends of tested inductance and current passing the inductance are collected and fed back to the main controller for calculation and the inductance value under different power conditions can be found. The invention also discloses the main circuit of the high-power inductance testing device and a testing method of the high-power inductance testing device. The device, the method and the main circuit are suitable to test of high-power inductance, the actual inductance condition can be simulated, the inductance value in the full power range can be solved one time and inductance curves under different current can be drawn on a display directly.
Owner:HEFEI UNIV OF TECH
Method and device for improving straight line degree measurement sensitivity
InactiveCN1920478AHigh measurement sensitivityHigh sensitivityUsing optical meansLaser transmitterOpto electronic
The invention relates to a method for improving the sensitivity of linearity test, and a relative device, wherein it is a laser testing system formed by fixed unit, movable unit and computer; it comprises laser emitter, deviation splitter, lambada / 4 wave plate, reflector, photoelectric receiver and signal processor. The optical element sets the testing light to pass the movable target mirror several times, to magnify its testing sensitivity several times; and it sets lens group before the detector, to magnify the sensitivity more. The invention can test two-dimension linearity of straight track real time.
Owner:BEIJING JIAOTONG UNIV
Nitrite quick detecting reagent box and application thereof
InactiveCN1936548AChange detectabilityTime consuming to changeMaterial analysis by observing effect on chemical indicatorColor/spectral properties measurementsSulfanilic acidNitrite
This invention relates to a quick test reagent box and its application of nitrite composed of a reaction post, colorimetric cylinder, 1-naphthol, sulfanilic acid hydrochloric acid solution, potassium ferrocyanide, zine acetate, borax saturated solution and a comparison card. The test method includes: preparing a sample process fluid to be processed in chromogenic reaction to compare with the comparison card and determine the content of nitrite in the sample to judge if it has exceeded the target by transformation, which can semiquantitatively test nitrite in foodstuff and the lowest detection limit is 0.1mg / kg.
Owner:TIANJIN UNIV OF SCI & TECH
Method for encapsulating optical fiber Bragg grating temperature sensor
InactiveCN101738269AStrong enoughAdequate temperature monitoringThermometers using physical/chemical changesCoupling light guidesMetal stripsFiber
The invention relates to a method for encapsulating a fiber Bragg grating temperature sensor, which aims to isolate external stress and strengthen the stability of the sensor. In the method, coating layers on both sides of a grid region of a fiber Bragg grating are removed to expose optical fibers, the optical fibers are cleaned by acetone, and both ends of the fiber Bragg grating are in welded connection with both ends of the optical fibers in an optical cable by using a welding machine; the fiber Bragg grating and an optical cable armor layer are fixed on a groove-shaped metal strip, the fiber Bragg grating and pigtails are in a loosing state, then bonding points at both ends of the groove-shaped metal strip are stuck with the optical fibers firmly, and heat-conducting silicone grease is filled into gaps; the encapsulated groove-shaped metal strip is put in a stainless steel encapsulation shell, steel wires in the transmission optical cable are pressed into symmetrical grooves in the stainless steel encapsulation shell to ensure that the fiber Bragg grating and the pigtails are in a loosing state in the encapsulation shell, and then the heat-conducting silicone grease is filled into the encapsulation shell.
Owner:韩红远 +4
Ambient neutron dose equivalent meter
InactiveCN102043161ALightweight instrumentEasy to carry and useMeasurement with scintillation detectorsScintillation crystalsNeutron radiation
The invention aims to disclose an ambient neutron dose equivalent meter. The ambient neutron dose equivalent meter is characterized by comprising a neutron probe, a neutron energy response adjustor and a control system, wherein a neutron detection element is arranged in the neutron probe, the neutron detection element is europium-doped lithium iodide scintillation crystal, the signal output end of the neutron probe is connected with the signal input end of the control system, and the neutron probe is placed at the position of the geometric center of the neutron energy response adjustor. Because the photomultiplier with high sensitivity is used as a photoelectric converter, the meter has light weight, portability, sensitive neutron response and good angle response, can accurately measure the ambient neutron dose equivalent level, has sound and light alarm function, is used for ambient neutron radiation monitoring of large nuclear facilities such as reactors, high-energy particle accelerators and the like, ensures neutron radiation safety of the ambient and the public, and fulfills the purpose of the invention.
Owner:上海新漫传感科技有限公司
Wheel profile laser measurement device
InactiveCN102607426AEasy to measure on siteSimple structureUsing optical meansMeasurement deviceControl signal
The invention relates to a wheel profile laser measurement device. An electromotor is fixed on one end of a base, and is connected with a drive screw, and an incremental photoelectric encoder is mounted on the other end of the drive screw; a guide rod which is parallel with the drive screw is arranged on the base as well, and the bottom of the base is fixed on a rail through supporting blocks; a movable slider is sleeved on the guide rod, and also cooperates with the drive screw by means of screw threads; a movable rod is fixed on the movable slider, a laser head of a laser displacement sensor is fixed on the top of the movable rod, the serial port and the USB port of the laser displacement sensor are respectively connected with the serial port and the USB port of a computer, and the signal output end of the incremental photoelectric encoder is connected with the control signal input end of the laser displacement sensor. The test device can conveniently measure the abrasion change of a wheel profile on the spot; moreover, the device is convenient to carry and easy and convenient to operate, the measurement precision is high, and the repeatability of test data is good.
Owner:SOUTHWEST JIAOTONG UNIV
Portable non-contact digital device for peeping and measuring inner cavity morphology of object
InactiveCN106989690AQuick collectionHigh degree of automationUsing optical meansLaser rangingPoint cloud
The invention relates to a portable non-contact digital device for peeping and measuring the inner cavity morphology of an object. The device includes an inner cavity collection mechanism, a control box and a motion support mechanism. The inner cavity collection mechanism is fixed on a side of the control box to complete the inner cavity collection for an object. The motion support structure realizes the motion and support of the inner cavity collection mechanism. The inner cavity collection mechanism and measures the radius value of the inner cavity by refracting a laser beam of a laser range finder by 90 degrees with a reflective mirror, and can calculate the inner cavity point cloud in a host computer by combining the rotated angle and a motion value in an up and down direction. The control box supplies power for the motion mechanism and the laser range finder, and achieves the control of the motion. The device is used for three-dimensional scanning and reconstruction of the inner cavity morphology of the object, so as to further measure the inner cavity of the object, achieve archaeological research and establish a digital museum.
Owner:SHANGHAI UNIV
Intelligent diagnosis device and method for transformer winding material
InactiveCN105973934AEasy to operateFast diagnosisMaterial heat developmentPerformed DiagnosisConductor Coil
The invention discloses an intelligent diagnosis device for a transformer winding material. The device comprises a PTC heating device, a temperature sensor, a collection device and a processor, wherein the PTC heating device is connected with the collection device through a relay; the PTC heating device is used for heating a starting end of a transformer phase joint conductive rod; the temperature sensor is used for collecting the temperature of the starting end of the transformer phase joint conductive rod; and the collection device is connected with the processor. The intelligent diagnosis device for the transformer winding material solves problems that the existing diagnosis device and method have slow diagnosis speed, complex diagnosis process and the like, the operations are simple, and the diagnosis speed is high; the device utilizes transformer material discrimination based on thermo-electric effect, thereby having simple operations without potential safety hazards. On the premise of not dismounting a transformer and breaking a winding, the device can simply and conveniently perform diagnosis; the use range is wide; the device can discriminate various transformer windings; and by aiming at different transformer phase joint, different sizes for heaters are designed, so that the intelligent diagnosis device can be used for discriminating the various transformer windings.
Owner:STATE GRID CHONGQING ELECTRIC POWER CO ELECTRIC POWER RES INST +1
Coal firmness coefficient rapid determination method and portable measuring equipment
InactiveCN101236145ARapid determinationRealize direct measurementWithdrawing sample devicesPreparing sample for investigationCoal dustEngineering
The invention relates to a quick determination method for the firmness coefficient of coal, which has the following steps of taking a coal sample, that is to take phi 1-3mm coal dust with a nest of screens; preparing a determination device, that is to vertically place a portable coal firmness coefficient quick determination device; charging the coal sample, that is to charge the phi 1-3mm coal sample into the determination device; compressing the coal sample, that is to turn a boosting knob to apply pressure and respectively record the travel of a scale pointer when the pointer of a pressure gauge stably reaches the pressure; computing the amount of compression, that is to compute the coal firmness coefficient of the coal body. The invention also relates to the portable coal firmness coefficient quick determination device, which comprises a coal sample barrel. The portable coal firmness coefficient quick determination device is characterized in that: the cavity of the coal sample barrel is divided into a compression cavity and a piston cavity, a travel groove is formed on one section of the piston cavity of the coal sample barrel, and displacement graduations are graved on the side of the travel groove. The determination device is capable of carrying out direct, multipoint and quick determination of the coal firmness coefficient down the hole with compact structure, convenient carrying and simple operation.
Owner:CHINA COAL TECH & ENG GRP CHONGQING RES INST CO LTD
Method and apparatus for enhancing measuring sensitivity of rotating corner
The invention relates to a method and device used to increase rolling angle measuring sensitivity. It belongs to photoelectric detection technique field. It is orderly set quarter wave plate, reflector, and plane reflecting mirror on light axis after collimation laser through polarizer and semi lens reflecting mirror; utilized plane reflecting mirror to make the light oppositely through reflector for two times, and quarter wave plate for four times. It can raise measuring sensitivity for two times based on 1687701A patent disclose number, and make the reflector move together with the rail to eliminate additive error, made the apparatus structure more compact to enhance its practicability at the same time. In addition, a receiving unit is added to realize rolling angle, pitch angle, deflection angle paralleling real time high accuracy measurement under the condition of unchanging measuring light path.
Owner:BEIJING JIAOTONG UNIV
Photoelectric edge detection system and detection method thereof
ActiveCN111721235ARealize non-contactRealize high-precision detectionUsing optical meansPhotovoltaic detectorsOptical property
The invention provides a photoelectric edge detection system and a detection method thereof. The system comprises a light source, which is matched with a diaphragm through a collimator, wherein the diaphragm is matched with a position sensitive photoelectric detector, the light source, the collimator, the diaphragm and the position sensitive photoelectric detector are located on the same side or two sides of a to-be-detected object according to different optical properties of the material of the to-be-detected object, and the position sensitive photoelectric detector is connected with a signalprocessing unit. According to the invention, object edge detection is converted into measurement light beam light spot intensity center position change detection, so that non-contact and high-precision detection of the object edge is achieved, corresponding shaping can be conducted on the measurement light beam through the specific diaphragm according to the edge characteristics of different to-be-detected objects, and the sensitivity and stability of object edge detection are greatly improved; and the system is simple and flexible in overall structure, can be adjusted according to materialswith different optical properties, and facilitates the on-site measurement.
Owner:ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
Optical measuring method of vibration and optical measuring system
InactiveCN101750142AEasy to carryEasy to measure on siteSubsonic/sonic/ultrasonic wave measurementUsing wave/particle radiation meansOptical pathOptical measurements
The invention discloses an optical measuring method of vibration and optical measuring system, which implements frequency shift and light division on the light emitted by a light source along two different light paths; wherein the light through frequency shift is used as reference light and the light not receiving frequency shift becomes circularly polarized light after passing through a polarized spectroscope and a 1 / 4 wave plate, and then is reflected by a measured substance, and becomes substance light which receives frequency shift due to vibration of the measured substance during the process of contacting the measured substance which is reflected, and then leads the substance light and the reference light to generate interference mutually, and is finally shot by the camera of a charge coupling element, thus being capable of implementing processing and operating on personal computers, thereby quickly and accurately obtaining the relevant parameters of the vibration of the measured substance without needing to contact the measured substance.
Owner:METAL INDS RES & DEV CENT
Portable tester for braking torque of elevator brake in use
The invention provides a portable tester for braking torque of an elevator brake in use. The tester can quantitatively and accurately inspect the braking torque of a static elevator in use and provide a reliable basis for comprehensive inspection of the elevator. The tester comprises a tuning gear and a control system, wherein the turning gear comprises a turning hand wheel and multiple different specifications of detachable small wheels coaxial with the turning hand wheel; the small wheels are in multiple relation with the radius of the turning hand wheel, and a torque sensor and a touch display are mounted on the turning hand wheel; the control system comprises an input / output system and a computer chip control system. The tester is portable, field measurement by elevator inspectors is facilitated, the measuring process is convenient and quick, measured data are scientific and accurate, no damage is caused to the tested elevator, and the safety is high.
Owner:河南省特种设备安全检测研究院商丘分院
Method and device for measuring wood density of standing tree
ActiveCN110793979AEasy to measureImprove accuracyResistance/reactance/impedenceMaterial analysis using microwave meansDielectricAcoustics
Owner:INST OF REMOTE SENSING & DIGITAL EARTH CHINESE ACADEMY OF SCI
Ultrasonic Doppler flow direction and flow rate instrument
InactiveCN104407171ASampling data is accurateHigh measurement accuracyIndication/recording movementFluid speed measurementEngineeringUltrasound
The invention discloses an ultrasonic Doppler flow direction and flow rate instrument which consists of a probe, a cable and a water surface host. The probe is connected with the water surface host through the cable to transmit an underwater signal to the water surface host. The probe comprises two transducers, a pipe body, a flow guide head, a tail wing, a rotary hanging rotor connector and a circuit board; the flow guide head is fixed at the front end of the pipe body; the tail wing is fixed at the rear end of the pipe body, so that a closed space is formed in an inner cavity of the pipe body; the lower end of the rotary hanging rotor connector is hinged to the top surface of the pipe body; two transducers are slantingly mounted at both sides of the front end of the pipe body; an included angle theta is formed between the longitudinal axis of each transducer and the longitudinal axis of the pipe body; the circuit board is mounted in the pipe body. The ultrasonic Doppler flow direction and flow rate instrument is provided with a pair of transducers arranged left and right at the front part of the pipe body of the probe and each of the transducers forms a certain included angle with the pipe body, ultrasonic waves are adopted to detect the flow rate and a measurement point is positioned at the front part of a machine body of the instrument, and thus, a flow field is not damaged and flow rate sampled data is accurate.
Owner:XIAMEN BOYIDA TECH
Multi-spectral microwave moisture instrument
PendingCN107102011AIncrease diversityImprove practicalityMoisture content investigation using microwavesMaterial typeVIT signals
The invention relates to a multi-spectral microwave moisture instrument. The multi-spectral microwave moisture instrument comprises an emission antenna, a reception antenna, an assessment instrument and a material selection switch. The assessment instrument is connected with the emission antenna and the reception antenna; the assessment instrument comprises a signal input terminal, the assessment instrument receives a material type selection signal through the signal input terminal and determines and outputs a microwave signal corresponding the material type selection signal, the emission antenna receives the microwave signal and the microwave signal is emitted to a measured material, the assessment instrument receives the microwave signal through the reception antenna, the microwave signal passes through the measured material to form an echo signal, and the echo signal is transmitted to the assessment instrument; and the assessment instrument can obtain the moisture detection result according to the material type selection signal and the echo signal. The multi-spectral microwave moisture instrument can pre-store the information of different calibration models corresponding to the various different materials, moisture content of different type materials can be measured by using the multi-spectral microwave moisture instrument, and the diversity and practicality of the multi-spectral microwave moisture instrument are increased.
Owner:默斯测控技术(长沙)有限公司
Detecting device for scene space lighting
ActiveCN103115674AEnsure consistencyHigh measurement accuracySpectrum investigationPhotometry using electric radiation detectorsWorking environmentEffect light
The invention provides a detecting device for scene space lighting. The detecting device for the scene space lighting solves the technical problem that efficiency and precision of the photoelectric detection of the current luminous environment are low. The detecting device for the scene space lighting comprises a photoelectric detecting head, a mobile platform and a data recording device. The detecting device for the scene space lighting is characterized in that the photoelectric detecting head is fixed on the mobile platform which can be displaced; the photoelectric detecting head comprises a shell and a plurality of detecters which are arranged the shell; the detecter comprises a front detector, a rear detector, a left detector, a right detector and an upper detector, wherein the detector, the rear detector, the left detector, the right detector and the upper detector are respectively arranged at the front portion, the rear portion, the left portion,the right portion and the upper portion. The front detector and the rear detector, the left detector and the right detector are mutually perpendicular to the light receiving surface of the upper detector. The detecting device for the scene space lighting has an integrated function capable of measuring five directions and can measure light distributions of the space of the environment. The mobile device which can be operated flexibly, conveniently and fast enables the detecting device to be placed in different working environments, so that the scene can be measured conveniently and randomly.
Owner:ZHEJIANG SANXIN LIGHTING INSPECTION EQUIP
Tamping type coke oven coal briquet density measurement method
InactiveCN101158627AEasy to measure on siteEasy to operateSpecific gravity measurementBriquetteEngineering
The invention discloses a density measuring technique for tamping-type coke furnace briquette. After being tamped and formed, the briquette is vertically put on the density sampling point of the briquette by using a density measuring tube and then pressurized by a pressure device to the depth of 250mm to stop, and the upper surface of the briquette is in the same level with a limit plate mounted on the outside of the density measuring tube; after that, the density measuring tube is taken out, and then the coal is vibrated out from the density measuring tube and is put into a measuring cylinder, the coal weight is gained by using a measuring device; the tamping density of the briquette is gained by calculating. The invention has the advantage of convenient measurement and operation on site with the deviation of the test result lower than 5 thousandths, as well as the test time shorter than 3 minutes.
Owner:山西沁新能源集团股份有限公司
Grinding amount analysis method based on grinding wheel end face grinding steel rail
ActiveCN112257203AEasy to operate on-site measurementHigh precisionGeometric CADMeasurement devicesPolishingGrinding wheel
The invention discloses a grinding amount analysis method based on a grinding wheel end face grinding steel rail. The grinding amount analysis method comprises the steps that firstly, measuring pointsare arranged in the longitudinal direction of the steel rail before grinding, and the profile of the steel rail at each measuring point is measured; the profile of the steel rail before polishing isreconstructed, and further the profile of the steel rail at each measurement point after reconstruction is obtained; and then the steel rail is ground for multiple times, and the grinding amount of the steel rail under the corresponding working condition can be conveniently and accurately calculated by measuring the profile of the steel rail before grinding and the grinding marks after grinding for each time and combining a certain data processing algorithm. Grinding amount parameters of the polishing equipment under different working conditions can be accurately mastered, effective guidance is formed for on-site polishing operation, and the polishing quality is guaranteed.
Owner:中铁物总运维科技有限公司
Engine rotational inertia measuring device
ActiveCN109612631AHigh measurement accuracyImprove measurement stabilityStatic/dynamic balance measurementEngineeringReducer
The invention discloses an engine rotational inertia measuring device. The engine rotational inertia measuring device comprises a machine body, a driving mechanism, a belt transmission assembly and aconnecting flange connected with an output end flange of an engine to be measured; the machine body comprises two adjacently arranged bases and three supporting seats; the driving mechanism comprisesa motor and a reducer which are connected in a transmission mode, and is placed on the bases and the supporting seats; the belt transmission assembly comprises a belt transmission mechanism, a belt tensioning mechanism and two rotating shafts, the two rotating shafts can be rotatably connected with two belt pulleys and the belt tensioning mechanism through four bearings, the first rotating shaft is coaxially and fixedly connected with the output end of the reducer, and the second rotating shaft is fixedly disposed at the center of the connecting flange. The power output by the driving mechanism can be transmitted to the output end flange of the engine to be measured under the action of the belt transmission assembly, and by measuring the change conditions of the rotational speed torque ofan engine output shaft, the rotational inertia of the engine to be measured can be accurately measured. The engine rotational inertia measuring device has a compact structure, convenient assembly anddisassembly, high practicability and convenient popularization and use.
Owner:CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD +1
Pouring bus duct and intensive bus duct conversion joint
PendingCN109616975ASimple structureEasy to manufactureSoldered/welded conductive connectionsTotally enclosed bus-bar installationsBusbarEngineering
A pouring bus duct and intensive bus duct conversion joint comprises a shell, a sealing plate, side plates, a conversion joint baffle plate, an end part baffle plate, an intermediate transition welding busbar, a pouring bus, an intensive bus, a pouring material and round nuts, wherein each sealing plate sequentially penetrates through a sealing plate hole and a sealing plate connection hole by a fastening piece to achieve fixed connection with two ends of the shell, the side plates are symmetrically arranged at two sides of an outer wall of the shell, the conversion joint baffle plate is arranged on an inner wall of one side of the shell, the side plates, the shell and the conversion joint baffle plate sequentially penetrate through side plate holes, side plate connection holes and a conversion joint baffle plate hole to achieve fixed connection by a fastening piece, the end part baffle plate is arranged at one side of the shell, the four round nuts are arranged in the shell, and the pouring material is filled in the shell. The pouring bus duct and intensive bus duct conversion joint is simple in structure, small in appearance structure and high in safety and is convenient to fabricate, standard of production, site measurement and installation can be achieved.
Owner:ZHENJIANG GARDERMOEN INTELLIGENT POWER TECH CO LTD
Multidimension permeability coefficient measuring instrument and measuring method
ActiveCN106546526AReduce disturbanceAvoid affecting the measurement resultsPermeability/surface area analysisMeasuring instrumentEngineering
The invention relates to the field of soil mass engineering, and in particular relates to a multidimension permeability coefficient measuring instrument and measuring method. The measuring instrument comprises a shell, a square cutting ring, a water insulation tank, a left cuboid glass tube and a back cuboid glass tube, wherein the square cutting ring is supported in the middle part of the shell and provided with a dismountable bottom at the lower side; the water insulation tank is supported in the middle part of the shell and covered above, below and around the square cutting ring; the left cuboid glass tube is supported at the left side of the water insulation tank, shaped like a right-angle U and provided with a bottom; and the back cuboid glass tube is supported at the back side of the water insulation tank and provided with a bottom. The measuring instrument and measuring method adopt water absorption sponge for water absorption and calculate flow through the change amount of the mass of the water absorption sponge, and a computer performs calculation according to the Darcy's law or other formulae and then outputs. For measurement of the coefficient of percolation in the horizontal direction, percolated water can be absorbed in time by using the sponge for water absorption, thereby preventing the percolated water from leaving along the wall of a soil sample, generating reverse percolation and the like, and avoiding influences on measuring results.
Owner:TAIYUAN UNIV OF TECH
Rolling angle measurement method and device based on grating
The invention discloses a roll angle measuring method based on a grating and a device thereof, which belongs to the technical field of photoelectric detection. A laser lases and emerges directly, or emerges after collimation through a collimating lens; the light is directly incident on a one-dimensional plane transmission grating, or reversely incident on the grating through a retrodirective reflector; plus-minus first stage diffracted light from the grating is focused to form two diffracted light points through a lens; a photodetector is used to detect the variations in positions of the two focused light points, thus figuring out a roll angle. The optical structure of the device is compact and simple, and brings convenience to practice; in addition, the accuracy, the stability and the economical efficiency are also high. The grating is used as a sensitive device; error separation is achieved, and the interference-free feature is improved by using the differential measurement of doublediffracted beams; few optical devices are used; and the power of the light source is low; the cost is low; mobile parts do not require to be provided with cables; the angle measurement distinguishability is as high as 0.5 and even higher; different requirements of measurement accuracy can be met just by replacing the grating with gratings having different numbers of lines.
Owner:BEIJING JIAOTONG UNIV
Laser multiple degree-of-freedom measuring system and method
InactiveCN1177195CEasy to adjustReduce usageUsing optical meansLight polarisation measurementLaser transmitterLight beam
Owner:BEIJING JIAOTONG UNIV
Water quality fluoride detection method based on digital image colorimetric analysis
PendingCN113945556AUse less reagentLow costMaterial analysis by observing effect on chemical indicatorFeature extractionColorimetric analysis
The invention discloses a water quality fluoride detection method based on digital image colorimetric analysis. The xylenol orange zirconium system is used for replacing a fluorine reagent in a national standard method, and the method has the advantages of being few in used reagent, low in cost, rapid in color development, high in sensitivity, good in stability and the like; according to the invention, MSRCR image enhancement is carried out on a digital image acquired based on a CCD industrial camera, so that the influence of low image brightness can be effectively reduced; according to the method, multi-dimensional color feature extraction is utilized, the Lab color first moment is utilized, color space distribution and pixels can be considered, image information can be better reflected, and the robustness of the established multiple linear regression quantitative analysis model is higher. The method has the advantages of wide detection range, convenience in operation, higher accuracy and precision, simple image acquisition equipment, easiness in carrying and convenience in field measurement.
Owner:ZHEJIANG UNIV OF TECH
Special device for measuring large curvature radius and measuring method
ActiveCN106556338AAccurate measurementEasy to measureUsing electrical meansTensile strainEngineering
The invention discloses a special device for measuring a large curvature radius and a measuring method. The special device is characterized in that a handle is mounted on the bottom of an elastic U-shaped bracket, and a high elastic steel sheet is fixed between two ends of the U-shaped bracket; rollers are installed on the two ends of the U-shaped bracket; strain gauges are pasted on the centers of the front and back sides of the high elastic steel sheet; the handle is equipped with a wireless strain collector; the two strain gauges and the wireless strain collector form a half-bridge measuring circuit by means of wires; it is required that the high elastic steel sheet can be freely bent without plastic deformation after bearing force. According to the special device, the strain gauges are pasted on both sides of the elastic steel sheet which can be freely bent without plastic deformation, so that the strain gauges on both sides and the wireless strain collector form the half-bridge measuring circuit, thus eliminating tensile strain. Only the bending strain is measured and the curvature of a curved surface is derived from the bending strain. Therefore, a technical problem in the field is solved.
Owner:SHANDONG UNIV OF SCI & TECH
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