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83 results about "Tacheometry" patented technology

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.

AGC (Automatic Gain Control) method capable of calculating thickness based on second flow

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

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

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

Underwater single beacon calibration method capable of estimating unknown effective sound speed

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

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

Simulated collision measuring device for automobile driverless test

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

Novel material dynamic mechanics performance testing method and device thereof

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

Vertically fixed motor vehicle tail gas monitoring system

The invention discloses a vertically fixed motor vehicle tail gas monitoring system, which comprises a telemetering host, a tachymeter, an atmospheric environment monitoring device and a control device. The tachymeter is suspended on a cross rod above a road and is used for measuring vehicle running state information of a motor vehicle to be measured and recording license plate data of the motor vehicle to be measured; the atmospheric environment monitoring device is arranged on a mounting frame above a road and is used for measuring surrounding environment parameters of a motor vehicle to bemeasured; the control device is arranged on one side of the road and is used for comprehensively judging whether the motor vehicle to be measured is a black smoke vehicle or not according to an exhaust smoke intensity value calculated by the telemetering host, license plate data recorded by the tachymeter and the surrounding environment parameters collected by the atmospheric environment monitoring device, and acquiring measurement result information. According to the vertically fixed motor vehicle tail gas monitoring system, a vertical fixed installation mode is adopted, a black smoke vehiclecan be detected, environmental influence factors are eliminated, the detection range is wide, and the test speed is high; monitoring precision is high and routine maintenance cost is low.
Owner:湖南轩源环保科技有限公司

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

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

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

Device for positioning splayed reinforcing plate of corrugated bulkhead and determining points for measurement of tacheometry

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

Quasi-dynamic vehicle-bridge aerodynamic characteristic wind tunnel test device

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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