67results about How to "Achieving Positioning Accuracy" patented technology

The invention relates to a nanometer positioning device and a nanometer positioning system, belongs to the technical field of automatic control of grating ruling machinery and solves the technical problems that in the prior art, the upper limit of the adjusting amplitude of a tilt angle and the adjusting precision of a nanometer positioning device are limited by the performance parameters, and the data collecting control module of a nanometer positioning system is large in developing difficulty. The nanometer positioning device comprises a substrate, a macro positioning platform, a first guiding guide track, a second guiding guide track, a micro-positioning platform, piezoelectric ceramic, a first laser interference displacement detection mechanism and a second laser interference displacement detection mechanism; one end of the piezoelectric ceramic is fixed on the macro positioning platform while the other end is contacted with the micro-positioning platform; the macro positioning platform slides along the first and second guiding guide tracks; the piezoelectric ceramic drives the micro-positioning platform to generate displacement. The invention also provides the nanometer positioning system applying the nanometer positioning device. The nanometer positioning device and the nanometer positioning system have a larger upper limit of the adjusting amplitude of the tilt angle and adjusting flexibility.

The invention discloses a non-linear constrained least square-based single station positioning method. The method comprises the steps of first, building an NLOS signal transmission model of a macro cell single base station according to a signal transmission characteristic of a macro cell; then, converting a positioning problem into a non-linear constraint least square problem by using a position relationship among a multi-path signal parameter, a base station, a target and a scatterer; resolving the least square problem by using an LM (Levenberg-Marquardt) algorithm; and when a residual is large, introducing an aquasi-Newton algorithm, and improving the LM algorithm so as to obtain a target estimation position. The method solves a problem that a traditional positioning algorithm depends on the number of base stations, performs positioning by using a single base station, does not need clock synchronization, and lowers the algorithm complexity; in the NLOS environment, the multi-path signal is used as a positioning path but does not suppress multiple paths, so that a problem of large positioning error in the NLOS environment is solved; the variable constraints are increased by using a ring model, so that the least square method is more effective, and the single station positioning of the macro cell reaches the positioning accuracy of 20-30 meters.

The invention belongs to the technical field of automation engineering and relates to an electromagnetic driving two-degrees of freedom spherical robot wrist and a control method thereof. The electromagnetic driving two-degrees of freedom spherical robot wrist is a high-integration driving spherical wrist device, the two output ends of an internal universal joint and an external universal joint passing through the same rotating center are coaxially connected, and a radial magnetizing permanent magnet in a servo mechanism is directly driven by a coaxial servo magnetic moment in a space universal rotary magnetic field to realize side-sway and pitching two-degrees of freedom rotation. The electromagnetic driving two-degrees of freedom spherical robot wrist overcomes the defects of a complicated driving machinery wrist, the wrist driving system is simple and light in structure, high in transmission efficiency, static and dynamic performance and control and response speed, can solve the modeling problem of the existing spherical electromagnetic driving joint three-dimensional complicated magnetic field, realize precise modeling of the spherical electromagnetic driving joint magnetic field and precise decoupling of electromagnetic coupling and mechanical coupling, and remarkably improves the response sensitivity and positioning precision of electromagnetic driving spherical joint control.

The invention discloses a train precise positioning method and system based on rail geometrical characteristic information matching. The method comprises the following steps of S1, performing time synchronization on the positioning data and the rail geometrical state parameters; S2, performing inertial navigation resolving according to IMU data; S3, performing melt resolving on the inertial navigation result and the rail mileage data; reckoning the mileage reckoning value; S4, on the basis of the time relevance, giving the mileage reckoning value to the rail geometrical state parameters to obtain a rail geometrical state parameter sequence; S5, performing matching on the rail geometrical state parameter sequence and the preset mileage related rail geometrical state parameter sequence to obtain a matched mileage value; S6, performing combined processing on the mileage reckoning value and the matched mileage value to obtain the optimum mileage estimation value. The rail geometrical state parameter is used as the characteristic signal; the characteristic signal and the preset mileage related rail geometrical state parameter sequence are subjected to relevance matching, so that the decimeter grade or even centimeter grade train positioning precision can be realized.

The invention discloses a light source for an optical automatic detector. The light source comprises three annular LED arrays which are coaxially superposed in three layers and an intermediate through hole, wherein the three annular LED arrays are all shaped like a truncated cone, and an LED lamp is embedded at the inner lateral side of the truncated cone; two red-blue double-color annular LED arrays are respectively positioned in the top layer and the bottom layer and are used for providing high-angle and low-angle lighting; one green annular LED array is positioned in the intermediate layer and is used for providing intermediate-angle lighting; and each red-blue double-color annular LED array is divided into a red set and a blue set based on the LED color, the red set and the blue set are respectively connected with an external control device, the green annular LED array is independently connected with the external control device, and a lens is placed right above the intermediate through hole of the light source in the shooting process. By using the invention, the external control device can control the light source to select different colors of the light source in accordance with colors of circuit boards so as to achieve combined lighting effect, so that colors of tin solder images can be obviously different from those of base plate images. Besides, the light source has simple structure and is convenient to control.

The invention relates to a flexible positioning device for automobile glass in a die. The flexible positioning device comprises a positioning unit, an induction unit and an adsorption unit, wherein the positioning unit and the adsorption unit are respectively connected with a programmable logic control (PLC) program unit and the induction unit; the positioning unit consists of a linear cylinder, a positioning head, a cylinder seat and a heat isolation plate; the positioning head is arranged on the linear cylinder; the linear cylinder is arranged on the cylinder seat; the cylinder seat is arranged on the die; the heat isolation plate is arranged between the cylinder seat and the die; the induction unit consists of a proximity switch and a proximity switch insertion piece arranged in the proximity switch; the adsorption unit consists of a suction disk and a supporting rod; and operation of the positioning unit and operation of the adsorption unit are sequentially controlled by the PLC program unit and the induction unit. Compared with the prior art, the flexible positioning device has the advantages of simple structure, convenience in operation, relatively low manufacturing cost, extremely high practicability and the like.

The invention provides a laser fusion backscattered light beam analog device to solve the problems that the analog devices in prior art have low calibration accuracy and require much time and effort. The analog device comprises a loading plate, two collimating holes and corresponding monitoring cameras and a universal light beam analog lens. The universal light beam analog lens comprises two orthogonal rotating joints of rotating shaft, and an analog target spot is arranged on the junction of the axis of the rotating shaft. A first pentaprism is arranged on the light path of an input light of the universal light beam analog lens, a first rectangular prism is arranged on the emitting light path of the first pentaprism, a second pentaprism is arranged on the emitting light path of the first rectangular prism, a second rectangular prism is arranged on the emitting light path of the second pentaprism, a third rectangular prism is arranged on the emitting light path of the second rectangular prism, a fourth rectangular prism is arranged on the emitting light path of the third rectangular prism, and light beam analog lenses are arranged on the emitting light path of the fourth rectangular prism. The analog device provided by the invention has advantages of high calibration accuracy, high efficient and ease of assemble and adjust.

The invention discloses a high-temperature and high-pressure composite fretting wear testing device. A high-pressure kettle is arranged in a heating cavity of a heating furnace and comprises a kettlebody and a kettle cover, the kettle cover is arranged on the upper side of the kettle body, and an airtight cavity is formed by the kettle body and the kettle cover. A tangential clamp mounting seat is arranged in the kettle body and used for fixing a tangential clamp, and the tangential clamp clamps a to-be-tested first sample. A connecting part of a tangential fretting assembly penetrates through the side wall of the heating furnace and the side wall of the kettle body and is fixedly connected with the tangential clamp mounting seat. An auxiliary supporting mounting seat is arranged in the kettle body and used for supporting a radial clamp in an auxiliary mode, and the radial clamp clamps a to-be-tested second sample. A connecting part of a radial fretting assembly penetrates through theside wall of the heating furnace and the side wall of the kettle body. Through vertical mounting of the high-pressure kettle, the kettle body is located at the lower part, the kettle cover is locatedat the upper part, the size of the upper part of the high-pressure kettle is decreased, operation is convenient, and meanwhile, the problem that interference factors are magnified after frequent motion of the high-pressure kettle is avoided.

The embodiment of the invention provides an indoor location method and system. When a location request sent by a location object is received, obtaining fingerprints to be measured of an object to located; calculating Euclidean distances between the fingerprints to be measured and the center of each fingerprint class in a position fingerprint library; determining a fingerprint class having the shortest Euclidean distance from the fingerprints to be measured as a belonging class; and determining whether the fingerprints to be measured are located at the edge of the belonging class or not, determining at least one reference class adjacent to the fingerprint class to be measured about the fingerprints to be measured located at the edge of the belonging class according to the Euclidean distances between the fingerprints to be measured and the center of each fingerprint class, taking fingerprint information and position information of all the reference points in the belonging class and the reference class as reference data, calculating the position of the object to be located according to the fingerprints to be measured, the belonging class and the reference class, and introducing the reference class to improve the location precision of the fingerprints to be measured located at the edge of the belonging class so as to totally improve the indoor location precision.

The invention provides a method and an apparatus for bonding workpieces, which suppresses workpiece deformation and adhesive solidification contraction and simultaneously causes the adhesive to solidify integrally and formally. The apparatus for bonding the workpiece according to the invention causes one part of the adhesive (3) clamped between the overlapped workpiece (1,2) to partially and temporarily solidify and the workpieces (1,2). Afterwards, the adhesive (3) is integrally divided into a plurality of areas and partial formal solidification occur on divided areas (3b,3c,3d) in multiple times successively. Therefore, even total area of integer of the adhesive (3) is large, the parts which are divided into a plurality of narrow areas are respectively and successively solidified. Therefore, compared with a method of formally solidifying integer of large-area adhesive in one time, the method provided by the invention is advantageous in that temperature increase amount of the workpieces (1,2) in each time of formal solidification and solidification contraction amount of the divided areas (3b,3c,3d) in the adhesive (3) are greatly reduced.

The invention discloses a power line insulator rapid detection and positioning method and system based on a on-site image. The method comprises the steps: acquiring a target image; performing rotationcorrection processing on the target image; and obtaining an insulator positioning result based on the trained YOLOv4 algorithm according to the target image after rotation correction processing. Through optimization modeling of a convergence function, the convergence speed and classification performance of a YOLOv4 algorithm are enhanced, and accurate identification and positioning of insulatorsin a field image are achieved. Meanwhile, an insulator self-adaptive rotation correction algorithm is provided, and the recognition precision of insulators in different space states is improved. Compared with a naive YOLOv4 algorithm, the algorithm has the advantages that the average detection precision of the insulator can be improved by more than 1.5%, and accurate positioning and detection precision of the on-site insulator of the power line can be achieved.

The invention discloses a regional safety protection system based on a depth camera. The regional safety protection system comprises acquisition equipment, an industrial personal computer and a controller, wherein the acquisition equipment is used for acquiring a depth image and a color image of a safety protection area and transmitting the depth image and the color image to the industrial personal computer; the industrial personal computer is connected with the acquisition equipment and the controller, and is used for receiving the depth image and the color image acquired by the acquisition equipment, detecting a human body, judging an intrusion relation between the human body and the safety protection area according to a detection result and sending different decision signals to the controller; and the controller is used for receiving and executing the decision signal so as to control the robot to work. The system can adapt to different bright environments, and is high in hardware integration level, flexible in installation position and high in precision.

The present invention discloses a method and system for Open-type automation navigation based on a robot. According to the user requirements, navigation scenes are determined as general navigation areas, accurate navigation areas and main path areas, the main path areas employ the Dijkstra algorithm based on a path network to obtain a path between the endpoint of the nearest path from the current position of the robot and the endpoint of the nearest path from the endpoint of a destination; and the human intervention of path planning is realized through the endpoints of the paths so as to allow the navigation to be accurate and controllable and allow the efficiency to be higher. The automatic navigation and accurate line patrol location of the robot are combined, and a buffer zone is employed to realize the transition from the general navigation areas or the main path areas to the accurate navigation areas. The width of a buffer strip is gradually reduced to 0.5-1 com from 5-10cm, the length of the buffer strip is between 20cm-100cm, and the location modes with different precisions are effectively connected to realize applicability transition of the location precision and realize smooth navigation effect.

The invention discloses a view field diaphragm installation adjustment structure of a one-dimensional imaging heterodyne spectrometer and a view filed detection method. The installation adjustment structure consists of a cylindrical mirror assembly, a work wave band optical filter, a spectrum dimension view field diaphragm, a collimating lens, an interferometer assembly, an imaging lens and a spatial dimension view field diaphragm; and the devices related to the installation adjustment structure and the view field detection method include a star tester, a supervision wave band filter sheet, a collimator, a movable reticle and a gauss ocular lens. The invention adopts the installation and adjustment of the spectrum dimension view field diaphragm under the supervision wave band and the view field detection, and obtains the size of the spectrum dimension through cropping the positioning of the spectrum dimension view field in the optical axis under the isolation ring thickness working wave band and correcting the formula. The invention utilizes the imaging characteristics of one-dimension imaging space outer difference spectrometer, enables the spectrometer to image at different positions of the spatial dimension view field diaphragm through changing the positions of the star points of the real image face of the collimator and calculates the size of the spatial dimension view field through the theory.

The spiral pipe structure comprises the separation column, a spiral square pipe and two adjusting blocks, each adjusting block is of a circular ring structure, the separation column is sleeved with the hollow portion of each adjusting block, the end faces of the sides, close to each other, of the two adjusting blocks are inclined planes, and the two inclined planes are parallel to each other. Thespiral square pipe is spirally wound on the separation column and arranged between the two adjusting blocks, the two sides of the spiral square pipe abut against the two adjusting blocks respectively,a pipe inlet hole and a pipe outlet hole are formed in the first disc, and the two ends of the spiral square pipe extend out of the pipe inlet hole and the pipe outlet hole respectively; the end, extending out of the pipe inlet hole, of the spiral square pipe penetrates through the adjusting block close to one side of the first disc, the cross section of the spiral square pipe is of a rectangularstructure, the long edge of the rectangular structure is parallel to the axis of the separation column. By means of the device, the technical problems existing in the prior art can be solved: when atwo-phase interface in the circular tube is eccentric, radial mixing is insufficient, and the axial inclination of the spiral tube is difficult to control.

The invention relates to a paint spraying machine and a paint spraying method thereof, and belongs to the field of cast pipe paint spraying. The paint spraying machine comprises a front conveying rail, a conveying chain, a rear conveying rail, a rack, a paint spraying trolley, a drying room and a heating station, wherein the front conveying rail is arranged at the front side of the conveying chain; the rear conveying rail is arranged at the rear end of the conveying chain; the paint spraying trolley is movably arranged on the rack; the heating station comprises a driven riding wheel, a drivingriding wheel, a heating driven riding wheel, a heating driving riding wheel and a heating room; the heating room and the drying room are arranged on the ground; a heat source of the heating room is transmitted to the drying room; the conveying chain is arranged between the driven riding wheel and the driving riding wheel; and the heating driven riding wheel and the heating driving riding wheel are arranged on the two sides of the conveying chain. The paint spraying machine is simple and reasonable in structural design, safe, reliable, convenient to assemble and disassemble, capable of reducing labor intensity and improving paint spraying efficiency, high in positioning accuracy, good in paint spraying quality, and capable of saving space and enabling a cast pipe to rotate at a constant speed.

The invention relates to the technical field of optical fiber sensing, in particular to a method for preparing optical cables of an optical fiber grating array for a long-distance positioning and speed measurement system for a high-speed magnetic levitation train. Equipment and materials requiring to be adopted in the preparation process of the optical cables are as follows: an automatic dispensing machine with an ultraviolet curing function, a dispensing loading platform, a tension loading mechanism, linear material automatic retracting and releasing equipment, a stirring device, automatic cabling equipment, an ultraviolet curing adhesive, magnetic powder, a flat polymer bottom band, a flat polymer flexible top band and the optical fiber grating array. The center of each low-reflectivityshort grating is coated with the corresponding magnetic powder to achieve strain sensing of magnetic materials, and by combining a plurality of sets of grating strain sensing arrays, each single optical cable can achieve 1 cm of positioning resolution and related speed measurement within the 10-km distance.

The invention discloses a high precision tool adjusting mechanism for a lathe. The high precision tool adjusting mechanism for the lathe comprises a bottom plate and a tool base arranged on the bottom plate; the bottom plate is provided with two step grooves in parallel, and a plurality of step nuts are embedded in the step grooves in a sliding manner; the tool base is provided with a plurality of locking screw holes and locking screws, and the locking screw holes and the locking screws are matched with each other; the locking screw holes and the locking screws correspond to the above-mentioned step grooves; and the bottom plate and the tool base are locked through the locking screws and the step nuts. According to the high precision tool adjusting mechanism for the lathe, under the condition that the heavy cutting force is borne or the cutting force is suddenly changed, ideal precision can still be guaranteed. The high precision tool adjusting mechanism for the lathe is elaborate in design and convenient to assemble, and good machining precision can be achieved; and the purposes of achieving the positioning precision within 3 microns and achieving full-angle and high-precision adjustment on the space where the tool base is located can be achieved within a short time, and the high precision tool adjusting mechanism for the lathe is low in manufacturing cost, long in service life, not prone to damage, good in rigidity and capable of being applicable to long time and large batch production operation.

The invention discloses a zero-point fine tuning device for a grating type micro-nano positioning platform. The zero-point fine tuning device comprises a platform body and a motion part. On the basis of cooperation between a pedestal and a return spring, the freedom degree of a grating read-in head in an actual application process is increased. With introduction of a differential head and a wedge block, fine tuning of the motion of the pedestal is realized by inclined-surface transmission; and the fine tuning displacement can be read directly by number reading by the differential head, so that the operability of the user is enhanced. Meanwhile, positioning bar structures are arranged at the sides of cooperation between the motion part and a grating ruler, so that the high positioning precision of the grating rule is realized. During actual assembling, high-precision assembling of the grating ruler is realized without any special clamping fixture, so that the requirement of the zero point position precision of the grating ruler is met.

The invention discloses a double-lead-screw-driven automatic turnover numerical control rotary table. The double-lead-screw-driven automatic turnover numerical control rotary table comprises a lathe bed, a sliding base, a working table body, a supporting plate and lead screws, the sliding base is arranged on the lathe bed in a sliding mode, the supporting plate is connected to the working table body in a sliding mode, the working table body can rotate and slide on the supporting plate, the right end of the supporting plate is hinged to a support at the right end of the sliding base, and the left end of the sliding base drives the left end of the supporting plate to move around the arc of the support through the lead screws, so that the working table body is driven to automatically turn over. The double-lead-screw-driven automatic turnover numerical control rotary table has the advantages that a servo motor is adopted to be connected to a right-angle double-output-shaft speed reducer, then a second-stage right-angle speed reducer is driven to equally transmit power to the two lead screws, then the supporting plate is driven to drive a table board of the working table body to turn over and swing around the support, the structure is stable, the synchronism property is good, the problem of automatic turnover motion of the table board of the numerical control rotary table can be solved, accurate control over the positioning precision and the repeated positioning precision in the turnover process of the working table body can be realized, multi-procedure and multi-angle machining can be realized by installing and clamping a workpiece at a time, and the machining efficiency and the machining precision of the inclined surface and an inclined hole of the workpiece are improved.

The invention relates to a stationary orbit real aperture microwave detecting satellite configuration in the overall technical field of satellites. The stationary orbit real aperture microwave detecting satellite configuration comprises a satellite platform, a microwave detector, a microwave detector quasi-optical system, a locking / release device, a solar wing, a digital transmission antenna, anda light blocking device, wherein a main reflection surface and a secondary reflection surface of the microwave detector are pressed on the satellite platform, and the main reflection surface and the secondary reflection surface are unlocked and deployed in place after the satellite and a launcher are separated; the microwave detector quasi-optical system is installed and embedded in the satelliteplatform by a micro-deformation frame; the solar wing is mounted on a cooling surface of the satellite platform; the digital transmission antenna is mounted on the top of the satellite platform through a bracket; the satellite platform and the microwave detector are inclined, that is, a certain angle exists between a ground observation axis and a satellite Z axis (that is, +Z ground); and after the orbit is fixed, over-constrained connection between the microwave detector and the satellite platform is unlocked, and the light blocking mechanism is deployed. The stationary orbit real aperture microwave detecting satellite configuration fully utilizes space resources in a fairing, and adapts to a mechanical environment of an active segment and high-precision installation requirements, so thathigh-precision deployment of the main reflection surface and the secondary reflection surface of the microwave detector is achieved.

The invention relates to a hydraulic synchronous control device for a fan-shaped section replacement device. The control device comprises a fan-shaped section replacement device execution mechanism, a controller and a double-proportional valve hydraulic synchronous control circuit. Closed-loop control is conducted on the double-proportional valve hydraulic synchronous control circuit through the controller to achieve synchronous movement of the fan-shaped section replacement device execution mechanism. The hydraulic synchronous control circuit mainly comprises a hydraulic control one-way valve, a pressure compensator, a proportional valve, an electromagnetic directional valve, a balance valve, a shuttle valve and a safety valve. The control device has the advantages that the swing angles of guiding swing arms on the left side and right side of the fan-shaped section replacement device are controlled synchronously through a double-proportional valve, so that the guiding swing arms can adapt to hoisting and positioning of different fan-shaped sections, hoisting, replacement and adjustment of different fan-shaped sections of a continuous casting machine can be achieved quickly and steadily, fan-shaped section replacement can be conducted safely, steadily and reliably, the automation level of fan-shaped section replacement is increased, and the control device is suitable for automatic control of fan-shaped section replacement devices of slab casters.

A high-voltage electric power steel tower displacement detecting device based on a high-precision Beidou system of the invention relates to a displacement detecting device, which is particularly suitable for monitoring high-voltage electric power steel towers in remote areas. The high-voltage electric power steel tower displacement detecting device comprises a battery management module and a Beidou module; the battery management module comprises lithium batteries and a charging control sub-module; and the BeiDou module comprises an antenna, a radio frequency sub-module, a control sub-module, an RDSS function sub-module, and an RNSS / GPS sub-module. According to the high-voltage electric power steel tower displacement detecting device based on the high-precision Beidou system, the device ischarged by solar energy, and the battery does not need to be replaced, a calculating integration between an RDSS algorithm and a control unit, and a GPS and a Beidou algorithm is realized by the Beidou module; and centimeter-level positioning accuracy can be achieved by using an RTK carrier phase difference technology, and the detecting interval and the threshold can be set by users.

The invention discloses a high-precision equipment clearance detection early warning system and method based on big data. The system comprises a vehicle body (1), a center console (3) arranged in the vehicle body (1), a positioning module (4) arranged at the bottom of the vehicle body (1) and a remote data processing center (6). The limit detection equipment (2) is arranged at the front end of the vehicle body (1), and the vibration compensation module (5) is arranged at the bottom of the vehicle body (1) and comprises a laser camera type sensor, a compensation camera and a gyroscope. According to the system, the gauge detection equipment (2) detects the profile data of each point of the section of the track, the positioning module (4) obtains the accurate position data at the moment, the remote data processing center (6) keeps the previous detection results of the section of the track at each position, and trackside facilities which generate tiny movement and are likely to invade the limit are automatically screened based on big data depth analysis; and comparing the limit with the limit to judge whether the limit is invaded or not, so as to pre-judge the limit invasion in advance.

The invention discloses a device and method for simultaneously detecting the positioning precision and straightness of a linear displacement table, and the device comprises a laser, a circular truncated cone lens and a CCD camera which are linearly distributed in sequence, wherein the circular truncated cone lens is fixed on a workbench of the linear displacement table, and the positions of the laser and the CCD camera are fixed, light beams emitted by the laser are refracted through an inclined surface on one side of the circular truncated cone lens, the refracted light beams reach the lowersurface of the circular truncated cone lens and then are reflected, and the reflected light beams reach the back surface of the circular truncated cone lens, are refracted again and finally reach thesurface of the CCD camera lens to form light spots. According to the detection method, a measurement method based on combination of an auto-collimation principle and CCD camera shooting is adopted, simultaneous detection of the positioning precision and the straightness of the linear displacement table can be realized by using a single laser and the circular truncated cone lens, and the precisionis relatively high. Moreover, the measuring device is simple in structure, the cost of adopted devices is lower than that of traditional calibrated instruments and equipment, and the measuring cost issaved to a great extent.

The invention discloses a one-dimensional imaging heterodyne spectrometer field diaphragm installation and adjustment structure and a field of view detection method. The installation and adjustment structure consists of a cylindrical mirror assembly, a working band filter, a spectral dimension field diaphragm, and a collimating lens. , interferometer components, imaging lens and space-dimensional field of view diaphragm; the equipment involved in the installation and adjustment structure and field of view detection method consists of a star point plate, a monitoring band filter, a collimator, a movable reticle and a Gaussian eyepiece. The present invention adopts the adjustment and the field of view detection of the spectral dimension field of view diaphragm under the monitoring band, and the positioning of the spectral dimension field of view diaphragm in the optical axis direction under the working band by trimming the thickness of the spacer, and by modifying the formula, obtains the spectral dimension Field of view size. Utilizing the imaging characteristics of the one-dimensional imaging spatial heterodyne spectrometer, by changing the position of the star point on the real image surface of the collimator, the spectrometer is imaged at different positions of the space-dimensional field diaphragm, and the size of the space-dimensional field of view is obtained through theoretical calculation.

The invention discloses an auxiliary positioning instrument for radiotherapy. The instrument comprises a headrest; the headrest comprises a fixing plate and a lifting plate; the lifting plate is located above the fixing plate; the fixing plate is hinged to one end of the lifting plate; a lifting mechanism is arranged between the fixing plate and the lifting plate; the other end of the lifting plate can ascend and descend along with the lifting mechanism. The instrument further comprises a base plate connected with the fixing plate, a longitudinal adjusting plate arranged on the base plate in asliding mode through a first sliding assembly, a transverse adjusting plate arranged on the longitudinal adjusting plate in a sliding mode through a second sliding assembly, and a control panel. A control chip and a control circuit which are connected with each other are arranged in the control panel. The control panel is electrically connected with the lifting mechanism, the first sliding assembly and the second sliding assembly. Through the lifting mechanism, the first sliding assembly and the second sliding assembly, automatic positioning of a target position of radiotherapy in space is achieved, and finally the target position is moved to a ray focus of radiation equipment.

The invention discloses a self-positioning orientation system and method based on a vehicle-mounted theodolite, thereby solving problems that when the existing theodolite carries out positioning orientation measurement in a landing mode, the operation process is complex, the calculated amount is large, the measurement error is large, and maneuverability is poor. The system comprises two same positioning devices and an upper computer. Each positioning device comprises a vehicle-mounted theodolite and two BD / GPS receivers; the two BD / GPS receivers are arranged on the two top surfaces of the opening side of a U-shaped bracket of the vehicle-mounted theodolite; the two BD / GPS receivers receive electromagnetic waves of a BD satellite and / or a GPS satellite, the coordinate positions of the BD satellite and / or the GPS satellite are calculated through the upper computer, so that position coordinates of the vehicle-mounted theodolite are obtained; and the azimuth angle and the pitch angle of any target can be obtained through the two vehicle-mounted theodolites.

The invention discloses a taper bearing press-fitting fixture. The taper bearing press-fitting fixture comprises a cylindrical fixture body, wherein an axially-penetrating guide hole is formed in thefixture body; a placement groove coaxial with the guide hole and used for placing a taper bearing is formed in one end of the fixture body; the sidewall of the placement groove is a conical surface used for forming transition fit with the outer race of the bearing; and an annular bypass groove used for accommodating a bearing retainer is formed in the bottom of the placement groove. During taper bearing press-fitting, the taper bearing is placed in the placement groove of the fixture body, radial location for the taper bearing is realized, and the deformation of the bearing retainer due to extrusion during taper bearing installation can be avoided; then the fixture body sleeves a steering column through the guide hole, and the guide hole is capable of playing the role of preliminary guide;then the taper bearing is pressed into a specified position on the steering column by virtue of a tool; and the taper bearing press-fitting fixture is simple and convenient, and capable of improvingthe bearing press-fitting quality and the bearing press-fitting efficiency. The invention further discloses a bearing press-fitting fixture comprising the taper bearing press-fitting fixture, for a vehicle steering column.

The invention discloses a self-positioning system and method based on a vehicle-mounted theodolite, thereby solving problems of complex operation process, large calculated amount, large measurement error and poor maneuverability when the existing theodolite performs positioning measurement in a landing mode. The system comprises a vehicle-mounted theodolite, two BD / GPS receivers and an upper computer; the two BD / GPS receivers are arranged on the two top surfaces of the opening side of a U-shaped bracket of the vehicle-mounted theodolite; two BD / GPS receivers receive electromagnetic waves of BDand / or GPS satellites; and coordinate positions of the BD and / or GPS satellites are calculated through an upper computer, so that position coordinates of the vehicle-mounted theodolite are obtained.