99 results about "Track detectors" patented technology

An encoder configuration comprises an illumination portion, absolute scale pattern comprising absolute tracks, and a detector having a width dimension YDETABS. An absolute track pattern comprises geometrically congruent sub tracks, and the congruent sub tracks are arranged such that if one is translated by the width dimension YDETABS, then they will nominally coincide. The congruent sub tracks may be separated by a dimension YCENT that is less than YDETABS, and may each have a dimension YTOL, such that [YCENT+2(YTOL)] is greater than YDETABS. Thus, the detector may be narrower than the absolute track pattern, but because the detector edges are each nominally located over congruent sub tracks the detected signal is not sensitive to lateral misalignment of the detector within the pattern. These principles provide great freedom in configuring advantageous individual pattern features in the absolute track, even though the detector is narrower than the absolute track.

Track and track / vehicle analyzers for determining geometric parameters of tracks, determining the relation of tracks to vehicles and trains, analyzing the parameters in real-time, and communicating corrective measures to various control mechanisms are provided. In one embodiment, the track analyzer includes a track detector and a computing device. In another embodiment, the track / vehicle analyzer includes a track detector, a vehicle detector, and a computing device. In other embodiments, the track / vehicle detector also includes a communications device for communicating with locomotive control computers in lead units, locomotive control computers in helper units, and a centralized control office. Additionally, methods for determining and communicating optimized control, lubrication, and steering strategies are provided. The analyzers improve operational safety and overall efficiency, including fuel efficiency, vehicle wheel wear, and track wear, in railroad systems.

A method and apparatus for dynamically detecting write fault errors is provided. According to the invention, transducer head control parameters are adjusted according to observed events. For instance, off-track events of a certain magnitude may trigger the implementation of a severe shock timer, which lengthens the delay between the off-track event and allowing write operations to resume, as compared to the standard off-track timer. According to another embodiment of the present invention, a lower write fault threshold is implemented following an off-track event of sufficient magnitude. According to yet another embodiment of the present invention, the average or accumulated position error of the transducer head is monitored, and a lower write fault threshold implemented if the average position error exceeds a threshold value. The present invention's provision of a method and apparatus that enables transducer head control parameters to be modified in response to observed off-track events allows the disk drive to provide high resistance to data loss without significant detrimental effects on the data throughput performance of the disk drive.

An expressway daily maintenance information management system comprises an intelligent road condition quick detecting car, a handhold mobile terminal, a data storage and processing center and eight information management module systems. The intelligent road condition quick detecting car comprises a patrol car, a high-definition camera, a laser rangefinder, a track detector and a car-mounted operation platform. The data storage and processing center comprises data storage equipment and a capital construction information data storage system. The car-mounted operation platform further comprises a car-mounted warning system which is connected with the data storage and processing center. Under the situation of ongoing traffic, the system can obtain expressway daily damage information, information management of daily maintenance task examining and approving, task issuing, project acceptance, measuring and the like can be achieved, and expressway network technology conditions can be monitored dynamically for a long time.

The invention provides a framework type track gauge and track direction measuring device, comprising a detection beam which is arranged on a track detector car framework; two groups of laser image displacement sensors which are respectively arranged at two ends of the detection beam for detecting the displacement of the track relative to the detection beam; a track direction accelerometer which is used for measuring the displacement of the central point of the detection beam relative to inertial space; a car body inertia correction platform which is used for measuring the posture of the detection beam and correcting the effect of the posture of the detection beam to the measurement data; a distance measurement sensor which is arranged at the countershaft end of a track detector car wheel for measuring the driving distance and driving speed of the track detector car and providing distance sampling time interval; and a data processing platform which is arranged on the detection car for processing the detection data to obtain the track gauge and the track direction detection results; the device solves the safety hidden troubles of an axle box track gauge detection beam and the problem that the track gauge and the track direction can not be measured under high speed.

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.

A proton computed tomography (pCT) detector system, including two tracking detectors in sequence on a first side of an object to be imaged, two tracking detectors in sequence on an opposite side of the object to be imaged, a calorimeter, and a computer cluster, wherein the tracking detectors include plastic scintillation fibers. All fibers in the detector system are read out by Silicon Photomultipliers (SiPM). A method of imaging an object by emitting protons from a source through two tracking detectors, through and around the object, and through two opposite tracking detectors, detecting energy of the protons with a calorimeter, and imaging the object.

The invention discloses a track detector. The track detector comprises a machine frame, a gauge measuring device and a geometric parameter measuring device for an F-shaped track, wherein the machine frame consists of a horizontal beam, a vertical beam and a running device, and one end of the horizontal beam is connected with the vertical beam; the gauge measuring device comprises a first pressing device and a gauge measuring sensor, the first pressing device is connected with the other end of the horizontal beam through an elastic component, and the gauge measuring sensor is mounted at one end, connected with the elastic component, of the horizontal beam; the geometric parameter measuring device for the F-shaped track is arranged on the vertical beam and comprises second pressing devices, a data collecting sensor and one or more brackets allowing the data collecting sensor to be mounted, and during the operation, the first pressing device, the second pressing devices and the elastic component are matched to fasten the track detector on the F-shaped track. The main body of the machine frame consists of the horizontal beam and the vertical beam, so that the track detector is good in wholeness, not prone to vibrate, simple in structure and convenient to assemble, disassemble and carry.

The invention relates to an intelligent patrol machine car. The intelligent patrol machine car comprises a car with road wheels and a motor, a control system which is arranged on the car, and a photoelectric track detector which is arranged on the car; the control system comprises a motor drive module, a track sampling and logic control module, a communication module, an infrared obstacle avoidance module and a temperature and humidity detection module; and the car communicates with an upper computer detection system by the communication module. The machine car has the advantages of being applied to fire protection and mould prevention of gain depots and all-weather monitoring, and avoiding labor consumption and fire resulting from negligence of staff. The car can automatically avoid obstacles and search routes, eliminates potential hazards, and judge whether the grain goes moldy according to the ambient humidity. Meanwhile, the car can also go to a plurality of hazardous environments to which human can not reach, and transmit the information acquired by a transducer to a computer which processes and displays the information by the communication module.

An optical disc apparatus reads the address information from an optical disc which has tracks and track spaces formed between tracks. The apparatus has an optical head which irradiates the disc with light and includes tracking detectors, divided into a first detector and a second detector in a track direction, detecting the light reflected from the disc and outputting detection signals, an adjusting circuit which adjusts amplitudes of the first and second detection signals and outputs the signals at a position where the address information is recorded, a differential amplifying circuit which outputs the differential signal which is the difference between the adjusted first and second detection signals, and an address detecting circuit which detects the address information based on the differential signal. As a result, the optical disc apparatus accurately detects whether information is being recorded on a correct track and improves the reliability during recording.

The invention provides a track detection device with an automatic travelling function. A track detector capable of automatically travelling comprises a vehicle body. The vehicle body is provided withabutting wheels making contact with the inner side surfaces of steel tracks and travelling wheels making contact with the top surfaces of the steel tracks, the abutting wheels or / and the travelling wheels are connected with drive motors, and the drive motors drive the abutting wheels or / and the travelling wheels. According to the track detector provided by the invention, a drive system is additionally arranged on the basis of a traditional track detector, the track detector can automatically move forward with the constant set speed per hour, the measuring speed can be increased exponentially,the vehicle body moving forward with the constant speed facilitates data measuring stability, and accordingly a foundation is laid for stability and intelligentization of track detection.

The invention belongs to a radiation dose measurement technique, and particularly relates to a personal neutron dosimeter with energy compensation. The personal neutron dosimeter comprises a casing, a gamma detection element and a solid track detector, wherein the casing is made of a boron-containing polyethylene material; an air cavity is formed in the casing made of the boron-containing polyethylene material; and the solid track detector is arranged in the air cavity. The personal neutron dosimeter ensures that the energy compensation effect is realized by using two conversion bodies which are the air layer and the boron-containing material.

The invention discloses a system and method for detecting the geometric quantity of a portable track through an MEMS gyroscope. The system is characterized by comprising a portable track detector body, the MEMS gyroscope, a speedometer, a left displacement sensor, a right displacement sensor, a signal collecting / conditioning unit and an embedded calculating device, wherein the MEMS gyroscope, the speedometer, the signal collecting / conditioning unit and the embedded calculating device are respectively mounted on the portable track detector body; the left displacement sensor and the right displacement sensor are respectively mounted on the left side and the right side of the portable track detector body; output signals of the MEMS gyroscope, the speedometer, the left displacement sensor and the right displacement sensor successively pass through the signal collecting / conditioning unit and the embedded calculating device. The detecting system and the method disclosed by the invention have the characteristics of compact structure, high reliability, high economy and reasonability and high detection accuracy, and can be widely used for the updating and the upgrading of a traditional portable track detector and have great application potential.

An apparatus for reading and / or writing data markings of an optical recording medium having data markings arranged along a track and header markings arranged laterally offset with respect to the center of the track, the apparatus having a header identification unit. According to the present invention an intermediate track signal is formed, which enables direction identification during the traversal of tracks. The present invention comprises an apparatus having a header sequence detector, a track crossing detector and an intermediate track detector, wherein the intermediate track detector is connected to outputs of the header identification unit, the track crossing detector and the header sequence detector, and generates an intermediate track signal.

The invention relates to a trolley which is used for detecting a track of a crane and has thefunctions of carrying instruments, clamping tracks and preventing turnover. The trolley comprises a machine frame, a clamping mechanism, a turnover preventing mechanism and a driving system. The machine frame is connected with the clamping mechanism through a triangular bracket; the turnover preventing mechanism is connected with the clamping mechanism by a guide pole; the driving system is arranged on the machine frame; shafts of a driving wheel and a driven shaft are supported by a rolling bearing pedestal; and the rolling bearing pedestal is fixed above the machine frame. The driving wheel and the driven wheel are in contact with the track of the crane through a square groove on the machine frame. The trolley for detecting the tack of the crane can carry a track detector to move forward on the track of the crane, finish the measurement on the geometrical quantity of the track in one step, and replace the traditional method that the geometrical quantity of the track of the crane is detected by manual labor section by section, and therefore, the measuring efficiency and accuracy are obviously increased, the overhead working of personnel is avoided, and the measuring cost is obviously reduced.

The invention provides a track detector. The track detector is used for detecting corresponding data of a track, comprises a main beam mounted on the track and a traveling wheel assembly which slidesalong the track, and further comprises a secondary beam, at least one traveling wheel adjusting assembly, a distance measuring assembly and a driving assembly. The secondary beam is parallel to the track and connected with the bottom of one end of the main beam; the traveling wheel adjusting assemblies are disposed at the bottom of the end, away from the secondary beam, of the main beam; the distance measuring assembly is disposed below the main beam and adjacent to the traveling wheel adjusting assemblies, and a signal transmitting point of the distance measuring assembly faces the travelingwheel adjusting assemblies, the driving assembly is disposed on the secondary beam for driving the traveling wheel assemblies to move. The traveling wheel assembly comprises left traveling wheel setsand right traveling wheel sets, the right traveling wheel sets are separately disposed at both ends of the secondary beam and are driven by the driving assembly to slide along a right track; the lefttravelling wheel sets are disposed on the travel wheel adjusting assemblies and slide along a left track; and the travelling wheel adjusting assemblies are used for enabling the left travelling wheelsets to slide by tightly attaching to the left track. The travelling wheel sets are attached to the track by the travelling wheel adjusting assemblies to improve the gauge measurement accuracy.

The invention discloses a track detector track direction irregularity measuring method based on an improved chord measuring method. The method includes the following steps: first, n track basic chord track direction measured values corresponding to mileage are input, and the corresponding chord is recorded as (A<i-2>, Ai); a straight line where the chord (A<i-2>, Ai) is serves as an X axis, A0 serves as an original point, and an axis which is vertical to the X axis and downward serves as a Y axis, a rectangular coordinate system is built; then, an included angle theta(i) between a line segment (A<i-2>, Ai) and the X axis is calculated; then coordinate values of A0, A1,..., An are calculated, and an equation of a straight line where the line segment (A0, An) is is calculated; and finally, distance from the Point A<n / 2> to the abovementioned straight line is determined, i.e., the track M-meter chord track direction irregularity. The track detector track direction irregularity measuring method based on the improved chord measuring method is not easy to accumulate a bigger error due to a small error obtained by measurement, and calculation of a track direction value on a non-circular curve track can also obtain a relatively ideal result.

The invention discloses a rat-track detector. The detector comprises a detection mechanism which is movable and can detect rat urine tracks on the earth, and an observation mechanism for observing status of rat tracks in real time, wherein the detection mechanism comprises a ultraviolet light emission assembly for emitting the ultraviolet light, and a fluorescence signal collecting assembly for receiving fluorescence signals of the rat urine tracks. The fluorescence signal collecting assembly is connected with the detection mechanism and transmits the fluorescence signals to the observation mechanism for displaying. The ultraviolet light emission assembly, the fluorescence signal collecting assembly and the detection mechanism are respectively electrically connected with a power supply mechanism. In prior art, rat clamps, rat cages and powder plates are used to investigate rat infestation, and deficiencies of low efficiency and accuracy and long time exist, and thus the invention provides the rat-track detector which can quickly, highly-efficiently and accurately inspect rat infestation.

The invention provides a rail detector with self power for medium-low speed magnetic suspension F rails. The rail detector comprises a machine frame which can slide on two parallel F rails; a left sliding device and a right sliding device which are separately in sliding fit with the two parallel F rails are arranged on the machine frame; power systems are arranged in one or more sliding devices ofthe left sliding device and the right sliding device, and can drive the two sliding devices to synchronously slide on the two parallel F rails; sensors for detecting the F rails and a data acquisition processing system are mounted on the machine frame. The rail detector disclosed by the invention is low in size, light in weight, quick to assemble and disassemble, and convenient to carry, and canwalk by self power; and F rail geometric parameters can be automatically detected by an operator through remote control.

A method for improving the precision of a quartz-type dynamic truck scale, the invention relates to the technical field of electrical automation; it improves the quartz-type dynamic truck scale through the data read by a weighing indicator, a charge amplifier, a track detector, a quartz load cell, and a temperature sensor. Vehicle scale accuracy; the quartz weighing sensor is connected with the charge amplifier, and the charge amplifier is connected with the weighing indicator; the track detector and the temperature sensor are all connected with the weighing indicator; the weighing indicator is connected with the weighing indicator Charge amplifier connection; improve the measurement accuracy of the quartz-type dynamic truck scale, the highest measurement accuracy of the weighing instrument system can reach ±1.0%, at the same time, improve the confidence, reliability and stability of the quartz-type dynamic truck scale; Charge disputes caused by balance errors.

The invention discloses a wireless optical communication device and method for achieving alignment tracking through a communication light peripheral part, and belongs to the technical field of wireless optical communication. An existing gigabit rate wireless optical communication system is large in size, weight and power consumption. In the multi-quadrant photoelectric detector of the device, a plurality of same alignment tracking detectors surround a communication detector to form an integral photosensitive surface; in the detection receiving module, an alignment tracking transimpedance amplifier and an alignment tracking limiting amplifier are connected to form amplification circuits, the multiple amplification circuits are parallel and are connected with a multi-channel A / D acquisitionchip, and the multi-channel A / D acquisition chip is further connected with an arithmetic unit. And between the multi-quadrant photoelectric detector and the detection receiving module, each alignmenttracking detector is connected with the input end of the alignment tracking transimpedance amplifier in each amplification circuit. According to the method, alignment tracking control signals are extracted by a plurality of alignment tracking detectors, communication electric signals are extracted by a communication detector, and communication and alignment tracking are synchronous.

The invention relates to a method for measuring <222>Rn and <220>Rn concentration synchronously by two-times etching on a single CR-39 piece. Etching is carried out on a single CR-39 piece twice and <222>Rn concentration and <220>Rn concentration are obtained synchronously based on reading numbers. The method comprises: a single CR-39 piece is installed in a small box to form a CR-39 solid track detector; the CR-39 solid track detector is placed in ambient air to measure <222>Rn and <220>Rn concentration in the air, wherein the measurement time is T1; after completion of the measurement, etching is carried out on the single CR-39 piece twice, and track values N1 and N2 are read under a microscope; the CR-39 solid track detector is placed in a standard <222>Rn chamber with the concentration of C1 and a standard <220> Rn chamber with the irradiation concentration of C2 respectively, wherein the irradiation time is T2; after completion of irradiation, etching is carried out on the CR-39 resin piece twice and track numbers N'1222, N'2222, N'1220, and N'2220 are read respectively under the microscope; and then calculation is carried out to obtain the <222>Rn concentration and <220>Rn concentration in the environment.

The invention provides a sun-tracking detector having wide-angle capturing and precise tracking functions. In the sun-tracking detector, two sets of photosensors are adopted, wherein one set of photosensors is used for wide-angle low-precision tracking; and the other set of photosensors is used for high-precision positioning and tracking. In case of a large tracking angle difference, the sun-tracking detector firstly performs the wide-angle low-precision tracking, and then automatically performs the high-precision positioning and tracking to lock the tracking target (the sun) when the tracking error is reduced to a certain value. The sun-tracking detector comprises four triangular pentahedron brackets which are mounted on a base to form a well, wherein the well is positioned in the center of the base, four walls of the well form four shading regions, four small rectangular grooves are arranged in the centers of four sides at the bottom of the well to form four light-guiding holes, four photoresistors are correspondingly arranged at the four small rectangular grooves at the back side of the base, the sunlight can irradiate the four photoresistors by penetrating through the four small rectangular grooves, the four photoresistors and potentiometers composing an elevation angle and azimuth angle detecting circuit are mounted on a circuit board at the back side of the base, and four photosensitive cells are affixed onto the sloping planes of the four triangular pentahedron brackets and are used for wide-angle capturing. The four triangular pentahedron brackets and the circuit board are mounted on the base to form a whole, thus composing the sun-tracking detector having the wide-angle capturing and precise tracking functions. The sun-tracking detector has a detection angle more than 180 degrees, can not lose a tracking target (the sun) within the all-day tracking time and has the characteristics of simple structure, small volume and low cost, and operation is reliable.

A digital data reproducing apparatus includes, a read head for reading data from a recording medium, an analog-to-digital converter for converting the data read by the read head into digital data, a memory for storing the digital data converted by the analog-to-digital converter, a phase control circuit for controlling phase of the digital data, and off-track detector for detecting off-track of the read head from a track on the recording medium. In the apparatus, storing operation to the memory is controlled based on output signal from the off-track detector and output signal from the phase control circuit.

A hydraulic self-propelled large-gradient concrete pouring trolley comprises a travelling system (13), a complete machine jacking system (16), a suspension system (12) and a distribution system (17). The travelling system (13) comprises a longitudinal beam (14), cylinder connecting bases (25), two front jacking cylinders (26) or two rear jacking cylinders (31), jacking supports (29), a rail (30), rail detectors (27), sensors (28) and a console (22), wherein the rail detectors (27) are used for detecting positions of the jacking supports (29), and the sensors (28) are used for detecting synchronism of the two front jacking cylinders (26) or the two rear jacking cylinders (31). By the aid of the hydraulic self-propelled large-gradient concrete pouring trolley, synchronism of the jacking cylinders can be realized, trafficability of the trolley in a tunnel can be improved, alignment and adjustment time of the trolley is shortened, and construction efficiency is improved.

The invention discloses a track alignment irregularity measuring method based on double antennas GNSS / INS. The invention aims to overcome the defects in the prior art. A track detector is used as a carrier; a dynamic reference station is constructed to achieve double-antenna GNSS high-precision differential measurement, measured high-precision GNSS data are used for correcting INS accumulative errors, track alignment data of the other side of the track is obtained through combining track gauge data after the track alignment data of one side of the track is obtained, and therefore continuous and accurate track alignment irregularity measurement data are obtained. The method comprises the following steps: 1, equipment is installed; step 2, initialization of the equipment; step 3, data measurement; step 4, fusing of the data; and 5, calculation of the track alignment.

The invention relates to a track positioning coordinate calculation method and device based on a set-free flat station of a total station. The method comprises the following steps: fixedly connectingthe total station with a track detector; arranging the track detector on a track motionlessly, carrying out measurement through the track detector so as to obtain a current mileage value and a currenthorizontal angle, carrying out measurement to obtain three-dimensional coordinate values of various CPIII control points under a total station coordinate system, and calculating through a set-free flat station algorithm to obtain a total station site coordinate; obtaining a first track design central line point and a second track design central line point being nearest to the current track position according to determination of the current mileage value, and carrying out calculation according to a three-dimensional coordinate of the first track design central line point and the second track design central line point to obtain a track directional angle and a slope angle; and carrying out calculation according to the track directional angle, the current horizontal angle and the slope angleto obtain a track central line coordinate under a geodetic coordinate system. According to the track positioning coordinate calculation method disclosed by the invention, the accuracy of the positioned coordinate can be improved, and the practical application demand can be met.

The invention discloses a track detector operating stably on a rail. The track detector comprises a flexible rail clamping walking wheel. A middle plate and a wheel frame are arranged in an adjusting base. A guiding column is arranged between a middle plate and the wheel frame and can move up and down along guiding columns respectively. A locking handle penetrates through the adjusting base and the middle plate in sequence. A spring is arranged on the lower portion of the locking handle in a sleeving mode and is placed between the middle plate and the wheel frame. A bottom face walking wheel is arranged at the lower end of the wheel frame. Side connecting arms are symmetrically arranged on the two sides of the upper portion of the adjusting base. The outer end of each side connecting arm is hinged to a side connecting rod. Side auxiliary wheels are arranged at the lower ends of the side connecting rods. A machine frame mounting piece is arranged at the lower end of the adjusting base. The two ends of the machine frame mounting piece are hinged to the middle portions of the corresponding side connecting rods respectively. During working, the bottom face walking wheel is in contact with the upper surface of the rail, the two side auxiliary wheels are arranged on the left side and the right side of the rail respectively, and the operation stability of the track detector on the rail is good.