963results about "Measuring apparatus" patented technology

The invention discloses a track irregularity detecting system and method based on an INS / GNSS. According to the method, an INS / GNSS combined measurement system is taken as a core measurement device, is fixed and arranged on a moving support and moves along with the moving support on a track, and a three-dimensional position coordinate sequence of the track and an attitude angle sequence of the track are obtained through measurement. Track irregularity is evaluated through a track irregularity evaluation method based on the coordinate method according to the combination of tack design curve parameters, the three-dimensional position coordinate sequence of the track, the attitude angle sequence of the track and a gauge measured value. According to the track irregularity detecting system and method, high-accuracy and high-efficiency dynamic measurement of the track irregularity is achieved, the track irregularity is evaluated on the basis of the coordinate method, and the evaluation method is simpler and more convenient to conduct, intuitive and easy to understand.

A rail sensing and analysis system utilizes a laser sensor 105, 107 to detect displacement of a rail 102, 104 resulting from loads imposed by a passing rail vehicle. Vertical and / or lateral displacements / loads may be sensed. Signatures in the resulting signals are indicative of useful information about the rail vehicle; such as wheel condition, bearing condition, truck condition, degree of bogie hunting, total load, load distribution, etc. The ratio of Lateral over Vertical force (L / V) may be used as an evaluation criterion.

Method for determining structural parameters of a railway track having a sensor array, includes measuring vertical and / or lateral irregularities of the rail with the sensor array along the rail, thereby providing signals corresponding to geometrical irregularities at different distance from the wheel-load. A model is provided describing the rail's deflection shape, which is dependent on structural parameters of the rail and on the loads on the rail. The model is stored in a processor where geometrical irregularities are compared under different load influence for generating a measured deflection shape. At least one theoretical rail deflection shape is generated using the model by varying structural parameters and the load in the model. At least one of theoretical deflection shapes is compared with the measured deflection shape for each point of the rail, and the structural parameters of that theoretical deflection shape which best matches the measured deflection shape are determined.

The invention discloses a system for kinetic model test of the ballastless track subgrade of a high-speed railway. The system comprises a model test box, a model of the ballastless track subgrade of the high-speed railway, an excitation system and a monitoring system, wherein the model of the ballastless track subgrade of the high-speed railway is formed by the foundation, a foundation bed bottom layer, a foundation bed surface layer, a concrete base, CA (cement asphalt) mortar, a track plate, a fastener system and a steel rail in sequence; the excitation system comprises a series of vibration exciters; simulation of train loads at different running speeds is realized by cooperatively controlling the vibration excitation frequency and phase of each vibration exciter; and dynamic earth pressure sensors and layered settlement gauges are arranged in the model of the subgrade, steel strain gauges are embedded in the concrete base and displacement and acceleration sensors are arranged on the track structure to jointly form the monitoring system of the system. The system can be used for carrying out study on the kinetic model test of the subgrade under the running load of the train and can evaluate and predict different foundation conditions, subgrade structures and track irregularity.

An autonomous device for rail track inspection includes a drive wheel system propelling the device via a drive wheel system, an automatic track loading fixture for and applying a load on rails, and sensors for taking track gauge measurement. Different automatic track loading fixtures may require stopping for load and measurement, or loading and measuring while still in motion. A switch agnostic system for operation with devices on a conventional railroad track system includes a linear slider movably mounted along a linear sliding support; multiple sensors mounted to the linear slider, the sensors operable to identify a rail of a track junction; and multiple roller bearings operable to engage the rail of the track junction and control the device across the track junction in response to movement of the linear slider along the linear sliding support.

The invention relates to the field of precise engineering survey, in particular to a method for rapidly measuring a foundation pile control net (CPIII) of a rapid transit railway on the basis of movable laser radar measuring technology and high-speed digital imaging technology. control net (CPIII) measurement data is obtained by using a movable high-precision measurement system comprising a laser scanner (1), a GPS / IMU positioning and orientating system (2), a high-speed digital imaging system (3), an industrial computer (4) and a power supply device (5); and united weighted adjustment is carried out on advanced net data, united measured data and auxiliary measurement points extracted from images to obtain high-precision control net (CPIII) control point coordinates. The invention can greatly shorten the measurement time of the control net (CPIII), overcomes the defect of little total correlation of discrete single-point measurement, carries out integral adjustment on all control points, has good closing property and high relative precision, obtains plane and elevation coordinates of all control points, and greatly simplifies the measurement work of the control net (CPIII).

The invention discloses an existing railway line retesting method based on the on-board laser radar technology. Firstly, control marks are arranged along a railway to be tested at preset intervals; secondly, position coordinates of the center point of each control mark on a railway engineering coordinate system are measured; thirdly, laser point cloud data and image data of rails, railway equipment and facilitates (such as annunciators, turnouts and contact net rods), terrain around the railway and the control marks along the railway are obtained, and colors of the image data are assigned to corresponding laser point cloud data; fourthly, the obtained colorized laser point cloud data are subjected to precision refining treatment with the position coordinates of the control marks as reference points, so that errors in the colorized laser point cloud data are eliminated; fifthly, rail surface linear laser point data are extracted from the colorized laser point cloud data subjected to the precision refining treatment; and sixthly, the line type of the existing railway is restored through the rail surface linear laser point data. Information of the existing line is accurately obtained under the condition that operation of the railway is not influenced.

A system and method for controlling railroad surfacing is provided. A computerized controller compares desired railroad rail position values with actual railroad rail position values such that a tamper machine raises, lowers, and horizontally moves the rails to correct the alignment of the rails and ties. The system may be used in conjunction with existing shadowboard tamper systems, with the computerized controller receiving precision reference signals corresponding to desired rail position values, and moving projectors according to the difference of the railroad rail position value and desired railroad position value.

The invention discloses a track geometric state measurement system based on a multisource information fusion technology and a track geometric state measurement method based on the multisource information fusion technology. The track geometric state measurement system comprises a track detection trolley and a total station, wherein the track detection trolley is provided with a computer with measurement software, a track gauge sensor, a longitudinal inclination angle sensor, a transverse inclination angle sensor, a mileage sensor and a three-dimensional top box. The invention also discloses the track geometric state measurement method. The invention has the advantages of high measurement precision and wide application range, integrates the advantage of absolute measurement of the total station and the advantage of locus measurement of the three-dimensional top box, and has remarkably higher measurement efficiency.

The invention relates to a device for detecting track parameters, in particular to an intelligent track detector for high-efficiency measurement of track parameters. The intelligent track detector comprises an intelligent track detection vehicle and a track satellite vehicle provided with a measurement prism; an automatic leveling platform is installed on the intelligent track detection vehicle; a total station is arranged on the automatic leveling platform, which can realize dynamic tracking and high-efficiency measurement; and the detection vehicle is provided with an inclination angle sensor fine-tuning platform and two measurement wheels at the two ends; and the measurement wheels are in elastic contact with a guide rail, so abrasion is not easily caused and the measurement precision is greatly improved. The invention has the following advantages: the intelligent track detection vehicle is provided with the automatic leveling platform and the total station, and is applicable to the static intersection and dynamic tracking measurement mode, and the operation efficiency is 5-6 times of that of the same type products of the prior art; and the inclination angle sensor fine-tuning platform, the two measurement wheels and the measurement fine-motion devices thereof can greatly improve the detection precision of the intelligent track detection vehicle and meet the high-efficiency and high-precision measurement requirements.

The invention belongs to a track parameter detection technology, and in particular relates to a method for efficiently measuring three-dimensional coordinates of a track based on a track precise control net, which comprises the steps of: setting a measuring interval on a track line, setting control pile points of the precise control net at two sides of the track line, installing an intelligent track detection vehicle and a track satellite vehicle on the track, wherein an operation frame of the intelligent track detection vehicle is provided with an automatic leveling platform and a total-station type electronic distance measuring device, and the track satellite vehicle is provided with a measuring prism; in each measuring interval, collimating the control pile points of the precise control net arranged at two sides of the track line by using an automatic collimating function of the total-station type electronic distance measuring device, statically intersecting and measuring three-dimensional coordinates of a measuring point of the total-station type electronic distance measuring device and coordinates of a starting point and an ending point of the track satellite vehicle in the measuring interval; and between the coordinates of the starting point and the ending point of the track satellite vehicle, tracking and measuring the track satellite vehicle by using the total-station type electronic distance measuring device and dynamically tracking the three-dimensional coordinates of the track line. The invention realizes measuring point option, eliminates a track control blind region, and has high operation efficiency by adopting a static intersection and dynamic tracking and measuring manner.

The invention provides a method for dynamically monitoring health states of a railway continuous-beam bridge and a rail overlapping device. Four fiber bragg grating vibrating sensors are arranged on the beam body end parts of a continuous beam and a simply supported beam; eight fiber bragg grating displacement sensors are arranged on a seamless rail, connected with the rail overlapping device, at a bridge seam joint; the vibrating sensors are used for performing vibration monitoring on a bridge seam body; the displacement sensors are used for performing continuous monitoring on the crawling displacement of the rail; and signals monitored by all the sensors are transmitted to a fiber splice box by virtue of a transmission fiber so as to be gathered, then are output to a demodulator so as to be demodulated and finally are transmitted to a data processing terminal so as to be processed and displayed, so that on-line dynamic monitoring is realized; by virtue of performing contrastive analysis on the historical change trend of data features and monitoring the health states of the railway continuous-beam bridge and the rail overlapping device, alarming is started if an alarm threshold value is exceeded, and the result is uploaded to a monitoring department in real time. The method can be used for dynamically monitoring the vibration of the bridge beam body and the displacement change of the rail in an on-line manner, prewarning in time and ensuring the heavy-load safe operation of a railway bridge.

This invention relates to a portable pushing car for checking railway, with such geometric parameter as railway gage, cant, triangle pit, including mechanical structure in I-shaped and three-point framework, electric source, induction testing, controlling and displaying sections. The bearing bogie structure, closing structure, hand button rod, measuring mechanism, controlling system, electric source, displaying box and various sense organs are mounted on main beam crossed on two-railway, three rollers and their mechanism which is both bearing and bogie. On one side of closing mechanism there is position closing wheel, on the other side there is retractable pressure resistant wheel used to make king piece and railway erect, and close to the inside of the railway. This advantages are light weight, stability, slight shaking and corrosion resistance.

A method and device for determining at least a first parameter of a track. The method includes providing a first track geometry quality data associated to at least one point along a rail at a first temperature, providing a second track geometry quality data associated to at least one point at a second temperature, and describing a difference between the first and second track geometry quality data using a model. The model relates the first and second track geometry quality data with associated temperatures to stress free temperature and / or track resistance, and estimates the stress free temperature and / or track resistance in at least one point based on the model.

The invention discloses a track parameter dynamic test car based on a combination of an inertial sensor and a navigational satellite. The track parameter dynamic test car based on the combination of the inertial sensor and the navigational satellite comprises a car body assembly, an inertial sensor assembly, a navigational satellite mobile station assembly, a navigational satellite base station assembly, a track distance measuring assembly, a speedometer assembly and a track test car control computer assembly. The track parameter dynamic test car based on the combination of the inertial sensor and the navigational satellite can automatically complete dynamic detection of nine track parameters such as height, track direction, distortion, level and superelevation, twist warps, plane degree, track distance, turn radius and mileage and the like after running on a track to be tested, achieves no-contact test, and achieves the highest test speed which is 60Kg / h. The track parameter dynamic test car based on the combination of the inertial sensor and the navigational satellite has the advantages of high and steady measurement accuracy, simple structure and easy operation, and is beneficial to generalize and use.

The invention provides a paving method of a CRTS I type plate type ballastless track slab in a severe cold region, which sequentially comprises the following steps of: building a roadbed and a CPIII control network, processing the surface of the roadbed, measuring during construction, constructing a base, constructing a convex baffling table, processing the surface layer of the base, paving a CA mortar pouring bag, paving a track slab, precisely adjusting the track slab, pouring CA mortar, arranging a resin pouring bag around the convex baffling table, pouring resin around the convex baffling table, and cleaning a work surface. The step of precisely adjusting a track slab adopts a prism frame method. The prism frame method comprises the following steps of: arranging two measuring frames at positions of screw bolt holes at the two ends of each track slab after building a CPIII control point; measuring a spherical prism on the frame after freely stationing a total station, wherein measured data represents a practical three dimensional coordinate of the track slab; counting the difference value between a theoretic three dimensional coordinate value and a practically-measured three dimensional coordinate value; precisely adjusting the track slab with a bidirectional adjustor untill that the difference value meets the criterion requirement. The CRTS I type plate type ballastless track slab which is paved with the method can meet the characteristic of the climate in the severe cold region.

The invention discloses a rail vertical irregularity estimation method and system based on extended Kalman filtering. The system is characterized in that vibration acceleration sensors and gyroscopes are installed on a train body and a frame, the output ends of the vibration acceleration sensors, the gyroscopes and train speed sensors are connected to a central processing unit, and spatial sampling of train body vertical vibration, train body nodding angular speed, frame vertical vibration, frame nodding angular speed and the like is realized through train speed signals. A vehicle rail coupling system state equation is established according to a kinetic equation for a vehicle rail coupling model; a sensor observation equation is established according to signals acquired by all sensors; a filtering iterative equation is configured to obtain time updating equations and measurement updating equations of state estimation and estimation error covariance; an optimal state at each moment is obtained according to extended Kalman filtering, and rail irregularity estimation is finally obtained after inversion by using the time updating equation of the state estimation. The rail vertical irregularity estimation method and system based on extended Kalman filtering have the advantages of low cost, good engineering feasibility, simplicity in operation and online real-time detection.

The invention provides an automatic state detection device and method for a railway track spring bar fastener. The device comprises a travelling mechanism; a travelling control mechanism is connected to the travelling mechanism; a spring bar fastener distance measurement module, an image acquisition module, a spring bar fastener surface three-dimensional point cloud acquisition module, and a data processing and judging module are fixedly mounted on the travelling mechanism; the spring bar fastener surface three-dimensional point cloud acquisition module is used for acquiring integral three-dimensional point cloud data of the spring bar fastener; the travelling control mechanism comprises a wireless receiver, a microprocessor and a driving motor; the data processing and judging module is used for determining the edge of a fastener in a spring bar fastener plane image based on the three-dimensional point cloud data and image data, extracting the image of the spring bar fastener, and judging whether a crack exists on the spring bar fastener according to the extracted image of the spring bar fastener. According to the automatic state detection device and method, whether the crack exists on the spring bar fastener or not can be detected automatically.

In a rail track system having transition points, a locomotive having a navigation system (such as a combined inertial / GPS location system) moves along an initially known track and enters the “halo” surrounding a track transition to begin data collection / logging to accumulate successive position information data points as the locomotive moves into, progresses through, and exits the “halo.” The collected data for movement within the “halo” is then subject to a best fit assessment relative to the data pre-stored in the track database.

The invention discloses a device for monitoring a state of a ballastless track structure through fibber bragg grating sensing, which comprises M fibber bragg grating steel rail temperature and stress combined sensors, N fibber bragg grating steel rail horizontal displacement, longitudinal displacement and vertical displacement combined sensors, P fibber bragg grating steel rail horizontal acceleration, longitudinal acceleration and vertical acceleration combined sensors, Q fibber bragg grating plate type ballast horizontal displacement, longitudinal displacement and vertical displacement combined sensors, R fibber bragg grating plate type ballast horizontal acceleration, longitudinal acceleration and vertical acceleration combined sensors, a multi-channel fibber bragg grating wavelength demodulator, a data processing terminal and an alarm device. The combined sensors are arranged at state monitoring points of the ballastless track structure of a rapid transit railway, and are directly contacted with the steel rail, the ballast and a base or are fixed by a supporting layer, wavelength output signals of various sensors are respectively transmitted to the demodulator through a transmission fiber and then are transmitted to the real-time data processing terminal and the alarm device, and if an abnormal state is monitored, the alarm device is started for early warning.

The invention discloses a device for steel rail surface online measurement and laser selective repair, which comprises a machine cart arranged on a steel rail, a three-dimensional scanner, a counter, a laser repairing device and a control device, wherein data measurement is processed for a steel rail surface by dint of the three-dimensional scanner mounted below a power engine body; the three-dimensional CAD graph of a to-be-repaired part is acquired through the comparison between the steel rail surface and a standard steel rail surface; and a complete data chain between the three-dimensional CAD graph of the to-be-repaired part and numerical control codes capable of controlling laser head movement is realized by a layering software. According to the invention, steel rail surface abrasion online measurement is associated with laser online repair equipment by the counter; high-precision selective repair is processed to the steel rail surface abrasion by dint of a high-power laser; repair time is saved; hardly-repaired parts such as a steel rail lateral face, a rail head bottom surface and the like are repaired by dint of filler wire laser repair technology; field adaption capacity is strong; working efficiency is high; and the repair of different steel rail abrasion types can be completed.

The invention discloses a moving load analog loading method and device for a rail transit wheel axle. A plurality of actuators are distributed above sleepers along a rail direction, the bottom of each actuator is connected in the span middle of a distribution girder, the bottoms of two ends of the distribution girder are arranged above steel rails at two sides, two continuous steel rails are laid on the sleepers and are respectively cut into mutually independent sectional steel rails above the positions of the sleepers, and each pair of sectional steel rail and sleeper is connected by a fastening system. Vertical pressure and upward pulling force are applied on the actuators by an anti-drop external member. A stress load time travel curve of a single fastening system under the effect of the wheel axle moving at different moving speeds is determined according to a train-rail-roadbed theoretical model and is used as a load exciting curve of each actuator, and the adjacent actuators are dynamically excited sequentially in the same time interval along the moving direction of the wheel axle so as to realize the analog loading of the moving load of the wheel axle at different speeds. The invention provides a reliable and convenient loading platform for developing a rail traffic dynamic model test research.

A method, performed by a computer having a processor and system memory, for calibrating a tie height of a ballast profiling rail vehicle having a remote sensing system, includes traversing the rail vehicle along a first calibration section of railroad track at a calibration speed, detecting, using the remote sensing system, a plurality of height to tie measurements in the first calibration section, establishing a rolling median average of the height to tie measurements, and determining a calibration tie height relative to the rail vehicle based upon the rolling median average.

A remotely operated laser survey device for performing a runway survey on a rail system that supports a device such as an overhead crane. The survey device includes a laser assembly and a survey car. The laser assembly can include a self-leveling laser. The survey car includes an image acquisition device and can be self-propelled by a drive mechanism. Images obtained using the image acquisition device are transmitted to a remote computer for analysis. The analysis can include a centroidal analysis of the image. Deviation of the rails is compared to established standards and correction carried out if necessary. The image acquisition device can be triggered to obtain images based on movement of the survey car. The survey car can be centered on a rail of the rail system to ensure accurate results regardless of the condition of the rail.

The invention relates to a high-speed railway track static comfort analysis adjustment method which includes the steps of utilizing a track trolley to measure high-speed railway track parameters to acquire track static measurement data to acquire track static measurement data, after carrying out accurate positioning of the track trolley by using a total station and a control network of foundation piles; drawing the track static measurement data into an oscillogram according to a certain proportion relationship, drawing a variation trend line according to the overall trend of the oscillogram, and carrying out a comfort analysis over the track according to the drawn oscillogram and the variation trend line; calculating adjustment amount required in adjusting the track according to the result of the comfort analysis, and carrying out a site adjustment for the track; carrying out repetition measurement over the track adjusted on site, and carrying out a repeatedly measured data analysis of the adjusted track and local optimization adjustment; if the comfort index of the repeatedly measured data is not in the allowed deviation, getting back to analyze and adjust again, and then generating a track static comfort test report from the analysis and adjustment data.

The present invention provides one kind of precise rail board regulating and measuring system for installing and locating rail board in high speed railway in high precision. The precise rail board regulating and measuring system includes a measuring robot, measurement controlling equipment, a regulating amount display terminal, a precise micro prism, a precise measuring frame and a precisely centering tripod. The measurement controlling equipment includes an industrial control computer, a data transmitting station connected to the industrial control computer, and a data transmitting station connected to the measuring robot. The present invention has high precision of measurement, installation and location, and is especially suitable for precise regulating operation of rail board in high speed railway.

The invention discloses a quick geometrical state measuring instrument for a track. The quick geometrical state measuring instrument for the track comprises a hand-propelled track inspection trolley, an inertial navigation system, an inclination angle sensor, a linear displacement sensor, a speed and mileage sensor, an intelligent total station and a data acquisition controller, wherein a main body of the quick geometrical state measuring instrument for the track is the hand-propelled track inspection trolley which can walk along the track; sensors for detecting a speed, mileage, a track space, an inclination angle and the like, the inertial navigation system, the intelligent total station and the data acquisition controller are integrated on the hand-propelled track inspection trolley. The quick geometrical state measuring instrument for the track is based on the principle of combining absolute measurement with relative measurement, the geometrical ride comfort evaluation parameters, such as the mileage, the track space, the levelness, the twist warp, the track direction and the height of the track, and the absolute deviations of the plane and the elevation of the track can be detected in real time. By using the quick geometrical state measuring instrument for the track, the detection of the parameters of the track is realized through the inertial navigation system; the absolute constraint is carried out through the intelligent total station; the quick geometrical state measuring instrument for the track is high in precision and quick in speed, and is influenced less by an external environment.

The invention discloses a transverse track irregularity detecting method based on an observer, which belongs to the technical field of track dynamic detection. The method comprises the following steps of: first, mounting a transverse acceleration sensor, a yaw angle measuring instrument or a gyroscope at the center of a bogie, so as to respectively measure transverse acceleration and yaw angular speed of the bogie in the train operation process; meanwhile, mounting a transverse acceleration sensor at the center of a train body bottom plate so as to obtain a train body transverse acceleration; and then carrying out relevant pre-processing, such as isolation, analogue-to-digital conversion, digital filtering and the like, on an analogue signal collected by a sensing device; and carrying out dynamics modeling on a train transverse suspension system by using the data to construct a transverse track irregularity estimating system, so as to detect the transverse track irregularity. The transverse track irregularity detecting method based on the observer, disclosed by the invention, belongs to an in-transit detecting method and has the advantages of stronger detection timeliness, simple structure of a detecting unit, uneasiness for being interfered by outside factors, high device reliability and low cost.

A remotely operated laser survey device for performing a runway survey on a rail system that supports a device such as an overhead crane. The survey device includes a laser assembly and a survey car. The laser assembly can include a self-leveling laser. The survey car includes an image acquisition device and can be self-propelled by a drive mechanism. Images obtained using the image acquisition device are transmitted to a remote computer for analysis. The analysis can include a centroidal analysis of the image. Deviation of the rails is compared to established standards and correction carried out if necessary. The image acquisition device can be triggered to obtain images based on movement of the survey car. The survey car can be centered on a rail of the rail system to ensure accurate results regardless of the condition of the rail.

The invention specifically relates to a precision measurement control method of a metro track structure construction, which solves the problems of poor safety, smoothness and comfort of a line and high equipment abrasion and noise vibration in the operation process because the existing measurement control method of the track structure construction has multiple steps and the control benchmarks for measurement can not be reused. According to the precision measurement control method, precision measurement control is performed on the track structure by utilizing a method of establishing a track basic control network in combination with a total station and a track geometrical state measurement instrument, thereby realizing high-precision adjustment on the track; and the track geometrical state measurement instrument is applied so that the precision requirements on points in the metro track measurement are improved to be requirements on the overall smoothness of the line, thereby guaranteeing that the indexes of track gauge, high-low rate of change, track orientation, high and low smoothness and the like of the track are capable of meeting higher requirements; and besides, digitization and automation are realized.