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86 results about "Tacheometry" patented technology
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Tacheometry (/ˌtækiˈɒmɪtri/; from Greek for "quick measure") is a system of rapid surveying, by which the horizontal and vertical positions of points on the earth's surface relative to one another are determined without using a chain or tape, or a separate levelling instrument. Instead of the pole formerly employed to mark a point, a staff similar to a level staff is used. This is marked with heights from the base or foot, and is graduated according to the form of tacheometer in use.
Laser screen target tachymeter and ballistic trajectory capturing method
InactiveCN104020312AImprove detection accuracySimple device structureDevices using time traversedElectromagnetic wave reradiationBallisticsVisibility
The invention relates to a laser screen target tachymeter and a ballistic trajectory capturing method, wherein the laser screen target tachymeter and the ballistic trajectory capturing method are applied to velocity measurement of a bullet. The laser screen target tachymeter is characterized by comprising a microprocessor unit, a display touch screen unit for display and operation, an X-axis laser screen transmitting unit, a laser receiving unit of an X-axis receiving laser screen, a Y-axis laser screen transmitting unit, a laser receiving unit of a Y-axis receiving laser screen and a signal processing circuit unit. The ballistic trajectory movement locus of the bullet can be traced out in the space through multiple points while velocity is measured, and compared with a ballistic trajectory measuring method in the prior art, the ballistic trajectory capturing method is low in cost, simple in principle, high in efficiency, free of influences of visibility of external environment and visual in measuring result.
Owner:XIANGTAN UNIV
AGC (Automatic Gain Control) method capable of calculating thickness based on second flow
InactiveCN102950155ARealize closed-loop controlHigh control precisionRoll mill control devicesMetal rolling arrangementsLoop controlTacheometry
The invention relates to an AGC (Automatic Gain Control) method capable of calculating thickness based on second flow, and the method is especially suitable for production and control of cold-rolled strip steels and belongs to the technical field of cold-rolled sheet processing of metallurgical industry. The method comprises the following steps of: calculating the thickness of the strip at the outlet of a rolling mill by a control model of second flow AGC; when a tachymeter cannot work regularly, measuring the speed of the strip at the outlet of the rolling mill by calculation instead of using the tachymeter, and participating in the second flow AGC; modifying a speed parameter to ensure the stability of the rolling process; and using the obtained roll gap and speed adjustment quantity in the thickness control of the rolling mill to realize closed-loop control of the second flow AGC. The method has the following beneficial effects: when a first frame outlet tachymeter cannot work regularly, closed-loop control of the second flow AGC is realized by the method when the tachymeter cannot work regularly, the conditions of production accidents caused by failure of the tachymeter in the production process are reduced, the control accuracy of strip steel thickness is improved and the production requirements are satisfied.
Owner:HEBEI IRON AND STEEL
Diesel vehicle gaseous exhaust pollutant remote sensing detection system and method
ActiveCN110967320AReal-time measurementAvoid affecting test resultsDetection of traffic movementInvestigating moving fluids/granular solidsTacheometryDisplay device
The invention discloses a diesel vehicle gaseous exhaust pollutant remote sensing detection system and method. The system comprises a diesel vehicle exhaust emission measurement device, a main controlcomputer, an information display device, a vehicle driving state monitoring device, a meteorological monitoring device and a vehicle license plate recognition device. The diesel vehicle tail gas emission measuring device, the information display device, the vehicle driving state monitoring device, the weather monitoring device and the vehicle license plate recognition device are in communicationconnection with the main control computer, and the main control computer is connected with the motor vehicle emission monitoring platform through the Internet. The vehicle driving state monitoring device is a vehicle speed and acceleration measuring instrument or a radar tachymeter. Compared with a traditional detection system, the remote measurement technology is adopted, the concentration of gaseous emissions in diesel vehicle tail gas can be measured in real time, and the system is suitable for tail gas emission detection of various motor vehicles provided with diesel engines and has the advantages of being convenient to operate, rapid and efficient.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY
Mounting, measuring and positioning device for steel pipe arch segments and construction method
InactiveCN106284077APrecise Control InstallationReduce security risksSurveying instrumentsBridge erection/assemblyBridge engineeringEngineering
The invention relates to the field of the constructing of bridge engineering, and discloses a mounting, measuring and positioning device for steel pipe arch segments and a construction method for the mounting, measuring and positioning device for the steel pipe arch segments. The construction method comprises the following steps that reflective patches are symmetrically arranged on the upstream side and the downstream side of each of the steel pipe arch segments, wherein an included angle between the reflective patches and a waist line of an arch rib of the corresponding steel pipe arch segment is a mounting included angle of the arch rib of the corresponding steel pipe arch segment; and measurement is completed in the manner of being matched with a tacheometry through the reflective patches, so that each of the steel pipe arch segments is accurately positioned. According to the construction method disclosed by the invention, mounting of the steel pipe arch segments can be accurately controlled, time for measuring is shortened, measuring data is stable, and a measuring staff does not need to construct or operate on the arch ribs, so that the safety risk is low; and long-term observation can also be real-time performed on the erected arch rib segment, and a data support is provided for the closure of the steel pipe arches.
Owner:中铁大桥局第七工程有限公司 +1
Method for determining best time to construct secondary lining of soft broken surrounding rock tunnel
InactiveCN104047611AEasy to operateConsider comprehensivelyUnderground chambersTunnel liningSupporting systemTotal station
The invention relates to a method for determining the best time to construct the secondary lining of a soft broken surrounding rock tunnel. The method comprises the following steps: S1, making a determining basis for the best time to construct the secondary lining of the soft broken surrounding rock tunnel; S2, adopting a tacheometry to monitor the vault crown settlement and side wall deformation convergence of a surrounding rock-primary supporting system of the soft broken surrounding rock tunnel on site; S3, determining in a deformation rate ratio method of the surrounding rock-primary supporting system of the soft broken surrounding rock tunnel; S4, determining whether the supporting is conservative or not by a five-stage rate ratio method of the surrounding rock-primary timbering system. Compared with the prior art, the method has the advantages that the operation is simple, the applicability is wide and the like.
Owner:TONGJI UNIV
Underwater single beacon calibration method capable of estimating unknown effective sound speed
ActiveCN110794409AGood application effectEasy to trackNavigational calculation instrumentsNavigation by speed/acceleration measurementsTacheometryEngineering
The invention belongs to the technical field of underwater positioning, and particularly relates to a single beacon calibration method of an underwater vehicle. When the underwater vehicle does not receive a periodic underwater sound signal, dead reckoning is carried out through a self-equipped electronic compass, a depth meter and propeller rotating speed information read by the underwater vehicle, and after receiving the absolute speed observation measured by a carried Doppler tachymeter, ocean current speed observation amount is constructed and the ocean current speed correction is carriedout through Kalman filtering; after the underwater vehicle receives the underwater sound signal, the unknown effective sound speed is modeled as a Student's t distribution by considering the unknown property of the underwater sound speed, and the position update of the underwater vehicle is carried out based on the extended Kalman filtering algorithm and variational Bayesian approximation by taking the underwater sound signal transmission time as the observation variable. Compared with the underwater single-beacon calibration method based on known fixed and constant effective sound speed and based on sound speed uncertainty for meeting Gauss distribution, more ideal positioning performance can be obtained by the method of the invention, and the actual application capability of an underwater single-beacon positioning system is enhanced.
Owner:HARBIN ENG UNIV
Tacheometry apparatus for microminiature turbojet
InactiveCN101382561AGuaranteed accuracyReduce volumeLinear/angular speed measurementJet engineSignal processing circuits
The invention discloses a device for measuring the rotating speed of a microminiature turbine jet engine, comprising a permanent magnet, a reluctance type sensor and a rotating speed signal processing circuit. With the rotation of the turbine jet engine, the magnet of a rotator of the engine generates an alternating magnetic field so as to lead the reluctance type sensor arranged on the engine to generate a weak electric signal which is matched with the reluctance type sensor, and the weak electric signal is transformed to a digital signal after being filtered, reshaped and amplified by the rotating speed signal processing circuit. The device for measuring the rotating speed has long measurement distance, small volume and high reliability, thus being applicable to the precise measurement of the super high rotating speed of the microminiature turbine jet engine under severe environment.
Owner:BEIHANG UNIV
Method for measuring relative positions of propeller and rudder blades of vessel
The invention discloses a method for measuring relative positions of a propeller and rudder blades of a vessel. The method is used for an integrated hanging rudder which does not need boring and processing, of a rudder system, and specifically comprises the following steps of firstly, fixing an upper sliding assembly on a steering engine deck, fixing a lower sliding assembly on the lower end surface of a rudder stock cylinder, and adjusting the upper sliding assembly and the lower sliding assembly to enable a steel wire to be located in a central axis of the rudder stock cylinder, wherein thesteel wire can express a rudder system center line; and then finding out a target center of a head reference target and a target center of a tail reference target by a tacheometry, and finding out a straight line by a collimating telescope, wherein the straight line sequentially passes through the target center of the tail reference target and the target center of the head reference target, and isa shaft system center line. According to the method disclosed by the invention, the relative positions and the relative distance between the propeller and the rudder blades are measured by using therudder system center line and the shaft system center line as the references; a stern shaft pipe is bored and processed according to measurement data, so that the shaft system center line is solidified, and the situation that regulated requirements of the relative positions of the propeller and a rudder are met is guaranteed.
Owner:HUDONG ZHONGHUA SHIPBUILDINGGROUP
Signal processing system based on FPGA laser tachymeter and method
InactiveCN105277947AReduce flowReduce processing timeElectromagnetic wave reradiationAnti jammingUSB
The invention discloses a signal processing system based on an FPGA laser tachymeter and a method. After power is on, FPGA sends a sampling clock to an AD sampling module. After FPGA receives data sampled by AD, the data are processed in real time. A processing result is transmitted to a PC for storage and display through USB. According to the invention, data flow between two core chips is eliminated; the data processing time can be effectively reduced; the chance of exposing the data to the outside world is reduced; the anti-jamming capability of the data is increased; a lot of time to store the data can be saved; the signal processing time is reduced to the greatest extent; the data processing delay is reduced; the timeliness is improved; the system and the method are adaptive to signals in different frequency bands, and take into account the measurement accuracy and measurement range; and a USB transmission mode is used, so that data transmission is stable.
Owner:NAT UNIV OF DEFENSE TECH
Simulated collision measuring device for automobile driverless test
InactiveCN111811838AFirmly connectedComprehensive testing dataVehicle shock testingTacheometryStructural engineering
The invention discloses a simulated collision measuring device for automobile driverless test. One side of a detection device is connected with a mounting structure; the interior of the mounting structure is detachably connected with a test plate; the side, away from the mounting structure, of the detection device is connected with a fixing structure; a storage box is fixedly connected to the middle of the side, away from the mounting structure, of the detection device; a traction guide rail is arranged under one side, away from the detection device, of the mounting structure; multiple pairs of adjusting structures are arranged on the two sides of the traction guide rail; the top end of each adjusting structure is connected with a clamping structure; and the interior of the clamping structure is detachably connected with a tachymeter. According to the invention, the detection device can be limited through the fixing structure, so that the detection device can be connected to a designated position more stably; the detector can be protected through the storage box, so that the detector is prevented from being affected by the outside to interfere with detection data or being impactedto fall off; and the test plates made of different materials can be firmly connected to the vertical plate through the mounting structure.
Owner:孙景玉
Concrete friction coefficient determination method and device
ActiveCN105043975AEasy to installEasy to set upUsing mechanical meansMaterial analysisProbe typeTacheometry
The invention discloses a concrete friction coefficient determination method and device. The method comprises the following steps: step 1, pouring concrete into a concrete pump pipe, and tamping the concrete in an insertion manner through an insertion tamping rod, so as to enable the concrete to be more uniform and compact; step 2, at any moment when the concrete falls, measuring pressure intensity through a pressure sensor; step 3, measuring a falling speed of the concrete through a speed measurement instrument; step 4, measuring falling time of the concrete through a probe type timing switch; step 5, obtaining the friction coefficient mu of the concrete through a calculation formula shown in the description. The device comprises the concrete pump pipe, a support, the pressure sensor, a bracket, the speed measurement instrument, the probe type timing switch, a hopper door and the insertion tamping rod. By adopting the concrete friction coefficient determination method and device, the friction coefficient between pumping concrete and the concrete pump pipe of different ratios can be detected and then the pumping performance of the concrete can be evaluated.
Owner:SHANGHAI CONSTRUCTION GROUP
Real-time vehicle speed monitoring method based on flink architecture
InactiveCN111429729AAvoid accidentsAvoid damageDigital data information retrievalRoad vehicles traffic controlTacheometryIn vehicle
The invention discloses a vehicle speed monitoring method based on a flink architecture, and the method comprises the steps of collecting data through a radar tachymeter, carrying out the data cleaning through a Flink platform, analyzing the data that the vehicle speed is greater than a speed limiting threshold value and the distance between vehicles is less than 200 meters through the flink platform, and obtaining the vehicle driving information; performing message consumption by using the flink platform, feeding overspeed vehicle information in the driving safety range back to the vehicle-mounted system, and enabling the vehicle-mounted system of the vehicle to report the overspeed vehicle condition to a driver; and meanwhile, performing data storage, so that historical data can be read,an overspeed accident investigation basis can be provided for traffic polices, and overspeed accidents can be simulated.
Owner:ZHEJIANG UNIV OF TECH
Rapid centering and leveling bracket for tacheometry
InactiveCN105202329ASimple structureSimple and fast operationStands/trestlesEngineeringStructural engineering
The invention discloses a rapid centering and leveling bracket for a tacheometry. The bracket consists of a supporting rod with a pedestal and an auxiliary tripod with a fixer, wherein the supporting rod is erected on a control point, is rigidly straight and is provided with a leveling circular level; a screw at the top end of the supporting rod can be connected with the tacheometry, so that a vertical shaft of the tacheometry is superposed with the axis of the supporting rod, and further rapid centering is realized; after centering, the supporting rod is fixed by using the auxiliary tripod, and a horizontal regulation screw of the tacheometry is regulated for enabling the tacheometry to reach a level state, so that rapid centering and leveling of the tacheometry are realized; the rapid centering and leveling bracket disclosed by the invention has the advantages of simple structure, simplicity and convenience in operation, high leveling speed, easiness in grasping, improved working efficiency and convenience in engineering application.
Owner:GUILIN UNIVERSITY OF TECHNOLOGY
Novel material dynamic mechanics performance testing method and device thereof
InactiveCN102841141AReduce mistakesAnalysing solids using sonic/ultrasonic/infrasonic wavesInertial effectRadial motion
The invention discloses a material dynamic mechanics performance testing method. The material dynamic mechanics performance testing method includes that (1) stress impulse waves with a certain stress are transmitted to a sample, motion speed vR in the radial direction perpendicular to the propagation direction of the stress waves is generated from mass points of the sample due to the transverse expansion effect and the transverse inertial effect when the stress waves are propagated inside the sample, the radial motion speed vR of the mass points is measured through a tachymeter, and the stress waves penetrating through the sample are measured through a pressure sensor; and (2) the collected radial motion speed vR measured through the tachymeter and pressure measured through the pressure sensor are calculated to obtain relationship of radial strain and longitudinal strain of the material sample. The invention further discloses a material dynamic mechanics performance testing device. Through combination of mass point speed measurement and pressure measurement, stress-strain relationship of the sample can be directly obtained, and errors caused by time displacement are decreased. At the same time, a measuring system becomes more compact.
Owner:INST OF MECHANICS - CHINESE ACAD OF SCI
Friction nanometer generator and self-driven intelligent tachymeter based on friction nanometer generator
PendingCN113037129AReduce the starting fluid flow rateReduce frictionBatteries circuit arrangementsElectric powerNanogeneratorDrive shaft
The invention provides a friction nanometer generator. The generator comprises: a planet carrier of which the one end is provided with a transmission shaft and the other end extends out to form a plurality of output shafts; multiple pin rollers, wherein the multiple output shafts are sleeved with the multiple pin rollers through bearings respectively, and a friction layer is arranged on the surface of each pin roller; and a stator which is arranged outside the multiple pin rollers in a sleeving manner, wherein an electrode unit is arranged on the inner wall of the stator, so that each pin roller can be in rolling friction contact with the electrode unit. The invention also provides a self-driven intelligent tachymeter based on the friction nanometer generator.
Owner:BEIJING INST OF NANOENERGY & NANOSYST
Vertically fixed motor vehicle tail gas monitoring system
InactiveCN111122479AWide detection rangeFast testColor/spectral properties measurementsTacheometryRemote sensing
Owner:湖南轩源环保科技有限公司
Method and system for measuring soil discharge amount of shield tunneling machine and medium
The invention discloses a method and system for measuring the soil discharge amount of a shield tunneling machine and a medium. The method comprises the following steps of receiving real-time measurement data which at least comprise the belt speed of a belt conveyor for transmitting muck, the density of the muck, the section area, the temperature of the current muck and the excavation stroke; calculating a dumping deviation value according to the measurement data; and performing overbreak and underbreak monitoring alarm based on the soil discharge deviation value. The system comprises a belt tachymeter, a soil discharge amount scanner, a thermodetector, a soil discharge odometer, a control box used for controlling the belt tachymeter, the soil discharge amount scanner, the thermodetector and the soil discharge odometer to work, and an industrial personal computer. The method and the system at least have the following beneficial effect that the construction quality and efficiency can beimproved.
Owner:广东欣龙隧道装备股份有限公司
Novel electric wheelchair with over speed alarm function
InactiveCN104000695AEasy to driveAvoid disorientationWheelchairs/patient conveyanceWheelchairTacheometry
The invention relates to a novel electric wheelchair with an over speed alarm function. The novel electric wheelchair comprises an electric wheelchair body, a GPS navigator, a power supply, a tachymeter, a processor and an alarm; the electric wheelchair body is provided with the GPS navigator, so a wheelchair driver can use the GPS navigator to find the target orientation when the user goes out; and the electric wheelchair body is provided with the power supply, the power supply is connected with the tachymeter, the processor and the alarm through a lead, a speed sensor is arranged in the tachymeter, so the tachymeter can detect the running speed of the electric wheelchair body and transmits the measured result to the processor, the alarm speed of the electric wheelchair body can be preset, and the process will trigger the alarm if the electric wheelchair body speed measured by the tachymeter is higher than the preset alarm speed in order to make the alarm sound. The novel electric wheelchair has the advantages of simple structure and easy manufacturing.
Owner:褚庆虎
Tacheometry apparatus for microminiature turbojet
InactiveCN101382561BGuaranteed accuracyReduce volumeLinear/angular speed measurementJet engineSignal processing circuits
Owner:BEIHANG UNIV
Intelligent variable-speed adjusting and material detecting and processing device for mining belt conveyor
The invention belongs to the field of belt conveyor equipment, and in particular to an intelligent variable-speed adjusting and material detecting and processing device for a mining belt conveyor. Thedevice comprises a bottom plate, a first stop block and a second stop block; the first stop block is movably installed at the upper end of the bottom plate through a first electric telescopic rod, the second stop block is movably installed at the upper end of the bottom plate through a second electric telescopic rod, and a pushing assembly is arranged on one side of the second stop block; the bottom plate is provided with a photoelectric tachymeter and a laser range finder. According to the intelligent variable-speed adjusting and material detecting and processing device for the mining belt conveyor, when a conveying belt conveys mineral materials, the conveying belt can be detected through the cooperation of the photoelectric tachymeter and the laser range finder, and when it is found that the movement rate of the conveying belt is lower than the standard rate, the first stop block and the second stop block are started to cooperate to shield the two sides of the conveying belt, the second stop block is pushed to be close to the first stop block through the pushing assembly, and meanwhile a motor driving the conveying belt to operate is accelerated.
Owner:钟国财
Intelligent meeting lamp control system based on AI image recognition and navigation system
InactiveCN111055759AIntelligent controlImprove accuracyVehicle headlampsOptical signallingAutomatic controlTacheometry
The invention discloses an intelligent meeting lamp control system based on an AI image recognition and navigation system. The system comprises a camera, a navigation module, a radar tachymeter, an intelligent vehicle-mounted terminal, a cloud system, a central control system, an MCU, and an ECU; the camera, the navigation module and the speed measurement module respectively collect coming vehicleimage information, vehicle front road condition information, vehicle driving speed and vehicle distance information in the vehicle driving direction, and upload the collected information to the cloudsystem through the intelligent vehicle-mounted terminal. The cloud system makes a decision according to the received information, generates a control instruction and returns the control instruction to the intelligent vehicle-mounted terminal; and the intelligent vehicle-mounted terminal sends the control instruction to the central control system, the central control system converts the control instruction into an instruction which can be recognized by the MCU, and the MCU controls the ECU to operate vehicle lamp switching. The meeting lamp is automatically controlled by combining a voice recognition technology, a navigation technology and an image recognition technology, so that a driver can correctly use the high beam and the low beam as much as possible, and traffic accidents are reduced.
Owner:南京酷沃智行科技有限公司
Road network level vehicle overload identification and emergency early warning method
ActiveCN113781783APrevent collapseReduce traffic accidentsDetection of traffic movementCharacter and pattern recognitionTacheometrySimulation
The invention discloses a road network level vehicle overload identification and emergency early warning method, and the method comprises the specific implementation steps: installing a corner sensor, a camera and a tachymeter near a bridge support, and measuring the main beam corner and vehicle information in structural deformation at the same time; establishing a typical vehicle database with known vehicle weight by using an RBF (Radial Basis Function) artificial neuron network, and establishing a vehicle weight prediction model; when a vehicle passes through a bridge, transmitting the vehicle information to an input layer of the artificial neuron network, and outputting the vehicle weight data through conversion of a hidden layer; enabling the vehicle weight prediction models of other bridges in the road network to receive the vehicle weight data and input the vehicle weight data into the vehicle weight prediction models of other bridges, and calculating and transmitting the turning angle and the deflection to the grading early warning system. According to the method, the vehicle prediction model is established by adopting the artificial neural network, and before the vehicle gets on the bridge, damage of the vehicle to the bridge is predicted, so that bridge accidents are prevented.
Owner:长兴县交通投资集团有限公司 +1
Dust test method for simulating lunar dust
Owner:BEIJING INST OF SPACECRAFT ENVIRONMENT ENG
Radar speed measurement AI algorithm
ActiveCN111693982AHigh precisionReduce output errorVolume/mass flow measurementFluid speed measurementData ingestionAlgorithm
The invention discloses a radar speed measurement AI algorithm. The radar speed measurement AI algorithm comprises six steps, namely, data acquisition, feature data extraction, data preprocessing, flow model establishment, flow model optimization and flow data output. The flow data output after the liquid level speed actually measured by the radar is optimized and calculated through the flow model, errors caused by liquid level fluctuation and signal strength influences are reduced, and the accuracy of the flow data output by a radar tachymeter is improved. Meanwhile, the established evaluation model can further evaluate the accuracy of the output flow data, in the process of repeatedly resolving and evaluating the flow data, the accuracy of the flow data of the radar tachymeter can be gradually improved, and flow metering data with small errors can be output.
Owner:CHENGDU WANJIANGGANGLI TECH
Laser distance measuring module with ADC error compensation by varying sampling times
ActiveCN108226905AAnalogue/digital conversionElectromagnetic wave reradiationTacheometryLaser scanning
A laser distance measuring module with ADC error compensation by varying sampling times. The invention relates to a distance measuring method and an electronic laser distance measuring module, in particular for use in a distance measuring apparatus, especially configured as a laser tracker, tachymeter, laser scanner, or profiler, for fast signal detection with an analog-to-digital converter, wherein conversion errors that arise in the context of a signal digitization, in particular timing, gain and offset errors of the ADC, are compensated for by means of variation of the sampling instants.
Owner:HEXAGON TECH CENT GMBH
High-temperature solid particle erosion test device
ActiveCN111257148AStir wellImprove sealingInvestigating abrasion/wear resistanceTacheometrySolid particle
The invention discloses a high-temperature solid particle erosion test device, and relates to the technical field of material erosion wear and protection. The high-temperature solid particle erosion test device mainly comprises a plurality parts such as an air compressor, an air pressure gauge, a flow regulating valve, a solid desiccant, a buffer tank, a heating coil pipe, a high-temperature gas storage tank, a temperature controller, a thermodetector, a mass flow meter, a sand storage tank, a magnetic stirrer, a sand mixer, an accelerating tube nozzle, an upper sealing test cavity, a strong adsorption sticky plate, an adsorption banister brush, a limiting clamping groove, a workbench frame, a lower sealing test cavity, a rotary separator, a particle collection box, a dust collection purifier, a sample clamping tester, a double-disc tachymeter and the like. Solid particles are uniformly stirred, heated and heated by a high-temperature gas, and the heat efficiency is high; secondary interference of the solid particles is avoided through speed measuring of the double-disc speedometer, and the double-disc speedometer is simple in equipment and convenient to operate; and a magnetic stirring device ensures the continuity of sand discharge of a nozzle on the premise of ensuring sealing.
Owner:XI'AN PETROLEUM UNIVERSITY
Environmental noise monitoring device
PendingCN110987163AExpand collection rangeImprove accuracySubsonic/sonic/ultrasonic wave measurementItem transportation vehiclesNoise monitoringEnvironmental noise
The invention discloses an environmental noise monitoring device which comprises a remote control electric vehicle, a storage battery, a lifting column, a lifting monitoring platform, a positioning module, a micro dust collector, a microprocessor, a remote transmission module, a wind direction tachymeter, a noise monitoring module and a temperature and humidity sensor. According to the invention,the noise monitoring device can automatically move to a proper monitoring position for noise monitoring, the acquisition range and accuracy of noise data are improved, the source and category of noisecan be analyzed in combination with wind direction and wind power and air temperature and humidity, and monitoring personnel are prompted to carry out targeted treatment.
Owner:浙江华才检测技术有限公司
Device for positioning splayed reinforcing plate of corrugated bulkhead and determining points for measurement of tacheometry
InactiveCN106364627APrecise positioningEasy to measure and take pointsMeasurement devicesWelding/cutting auxillary devicesEngineeringTotal station
The invention relates to a device for positioning a splayed reinforcing plate of a corrugated bulkhead and determining points for measurement of a tacheometry. The device comprises a plane angle plate, wherein the plane angle plate consists of a first lath and a second lath; a first blocking plate is perpendicularly welded to the rear side of a lower end surface of the first lath; a second blocking plate is perpendicularly welded to the front side of a lower end surface of the second lath; one or more fixing plates are perpendicularly welded to the front side of the lower end surface of the first lath; a threaded hole is formed in each of the fixing plates; a bolt is connected to the corresponding threaded hole; the tail end of each of the bolts penetrates through the corresponding fixing plate; and a measuring hole of the tacheometry is formed in the intersection of a center line in the length direction of the first lath and a center line in the length direction of the second lath. The device disclosed by the invention is simple in structure and convenient to operate, and positioning the splayed reinforcing plate and determining the points for the measurement of the tacheometry are facilitated by the device disclosed by the invention, so that the device is high in practicality.
Owner:AVIC DINGHENG SHIPBUILDING
Radar velocimeter
InactiveCN112213717ASmall footprintImprove convenienceRadio wave reradiation/reflectionRadarTacheometry
The invention relates to the technical field of radar velocimeters, and discloses a radar velocimeter which comprises a velocimeter body, a connecting piece is rotatably connected to the side wall ofthe lower side of the velocimeter body through a damping rotating shaft, a connecting rod is fixedly connected to the lower end of the connecting piece, an inserting groove is formed in the lower endof the connecting rod, and a rotating shaft is movably inserted into the inserting groove. The lower end of the rotating shaft extends out of the inserting groove, two clamping strips are symmetrically and fixedly connected to the shaft wall of the rotating shaft, clamping grooves are formed in the groove walls of the left side and the right side of the inserting groove, the two clamping strips are located in the two clamping grooves correspondingly, a threaded rod is connected to the lower end of the rotating shaft, and a rotating groove is formed in the upper end of the threaded rod; the lower end of the rotating shaft is located in the rotating groove. According to the radar velocimeter, the space occupied by the radar tachymeter during storage can be effectively reduced, and the storage and carrying convenience of the radar velocimeter is effectively improved.
Owner:陕西诺盈自动化仪表有限公司
Quasi-dynamic vehicle-bridge aerodynamic characteristic wind tunnel test device
ActiveCN114383803AAchieve separationAvoid interactionAerodynamic testingAir velocityMarine engineering
The invention relates to the technical field of wind tunnel tests, and particularly discloses a quasi-dynamic vehicle-bridge aerodynamic characteristic wind tunnel test device, which comprises a fan, a wind tunnel, a bridge model, a vehicle model, a tachymeter and a dynamometer, wherein the bridge model is arranged in a wind tunnel, and the vehicle model is arranged above the bridge model and located in the wind tunnel; the tachymeter is arranged between the fan and the wind tunnel; the dynamometer is installed on the vehicle model. The fan is arranged at one end of the wind tunnel, and the wind tunnel test device further comprises a synchronous belt device used for simulating the ground effect. A fan and a synchronous belt device are adopted to simulate train wind and ground effects generated by movement of a high-speed train, a bridge and a vehicle are separated, a vehicle model is kept static in the test process, and force measurement noise interference caused by vibration of the vehicle model is avoided; the high-speed fan can test the aerodynamic characteristics of the vehicle under the condition of a small wind deflection angle; the six-component force of the vehicle under the conditions of different wind speeds, vehicle speeds, wind barriers and the like can be tested.
Owner:SOUTHWEST JIAOTONG UNIV
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