30results about How to "Increased scanning field of view" patented technology

The invention relates to a rotating triple-prism beam scanning device comprising a rotating double-prism system, a rotating single-prism system, a guide rail, an adjustable support, and a fixed support. The rotating single-prism system comprises a base component, a prism and frame assembly, and a worm-and-gear mechanism. The prism and frame assembly comprises a flat washer, a wedge prism, a rubber pad, a wedge retainer ring, a threaded retainer ring, and a frame. The base component comprises a base, a base baffle, and a base insert. The worm-and-gear mechanism comprises a rotary motor, a motor stand, a coupling, a worm, a bearing support, a rolling bearing, a worm gear, an encoder support, and a rotary encoder. The rotating double-prism system is formed by assembling two rotating single-prism systems together. In the invention, the three wedge prisms are driven by the worm-and-gear mechanisms to do full-circumferential rotation, transmission is stable and accurate, and the scanning precision and stability of dynamic beams can be ensured; the prisms are independent of one another in rotation control, and diversified scanning modes can be achieved; and by introducing the third prism to the double-prism system, the scanning field of beams is enlarged significantly, and the problem that a double-prism system has scanning blind areas and control singular points is solved effectively.

The invention discloses a low-altitude light and small infrared and laser radar integrated system which comprises a motor, a POS system, a power supply device, a flying control system, an infrared camera, an airborne laser radar measuring instrument, a storage device, a stabilized platform and a flying platform. The POS system is connected with the flying control system, the flying control system is connected with the motor, the infrared camera and the airborne laser radar measuring instrument, and the motor is connected with the infrared camera. The power supply device is connected with the motor, the POS system, the infrared camera, the airborne laser radar measuring instrument and the storage device; the infrared camera and the airborne laser radar measuring instrument are connected with the storage device, and the airborne laser radar measuring instrument is connected with the POS system. The airborne laser scanning measuring instrument, the POS system and the infrared camera are fixed to the stabilized platform. The low-altitude light and small infrared and laser radar integrated system can be applied to the field of aerial photogrammetry and remote sensing, and is not influenced by weather and surroundings, and all-time and all-weather photogrammetry is really achieved.

The invention provides a laser radar, comprising multiple transceiving modules and at least one scanning module, the multiple transceiving modules are used for transmitting a pulse laser beam and receiving an echo signal, reflected by a to-be-detected target, of the pulse laser beam, and the at least one scanning module is used for reflecting the pulse laser beam transmitted by the multiple transceiving modules to a three-dimensional space and is also used for reflecting the echo signal to a corresponding transceiving module; the multiple transceiving modules are horizontally arranged side byside, the scanning module is located at one side of the multiple transceiving modules, emergent surfaces of the multiple transceiving modules are respectively towards the at least scanning module, each transceiving module accordingly detects one sub scanning field of view, and multiple sub scanning fields of view form a total field of view of the laser radar through splicing of the fields of view.The laser radar provided by the invention has the advantages that a scanning field of view of the whole laser radar is increased by utilizing and splicing the multiple sub scanning fields of view; each transmitting module comprises multiple light sources which are arranged in a vertical direction at intervals, so that linear density of a scanning trace of a vertical field of view is effectively increased; and multiple light sources adopt time-sharing transmitting, so that interference of a receiving light path is reduced.

The invention relates to a laser radar system and a laser scanning control method. The laser radar system can comprise a laser emission module, a double-refracting prism, a galvanometer and a laser reception module, wherein the laser emission module is used for emitting a laser beam; the double-refracting prism is used for separating the laser beam into first laser and second laser emitted towardthe galvanometer; an included angle exists between the first laser and the second laser; the galvanometer is used for reflecting the first laser and the second laser to different positions of a detection area; the laser reception module is used for respectively receiving a first echo light beam and a second echo light beam reflected back from the detection area; the first echo light beam is laser,reflected back by an object in the detection area, of the first laser; and the second echo light beam is laser, reflected back by the object in the detection area, of the second laser. By adoption ofthe laser radar system, the scanning field angle can be improved.

The invention relates to a novel large-view-field linear scanning CT system and an image reconstruction method, and belongs to the technical field of X-ray imaging detection. The system comprises an X-ray source, a detector, a detection object, a data acquisition system, an image processing system, a control system and a mechanical system. The X-ray source is a cone beam ray source, and the detector is an area array flat panel detector. In the scanning process, the detector is fixed, and the X-ray source does parallel linear motion relative to the detector. Compared with a traditional CT system, the imaging view field is enlarged, and the CT system has the advantages of being simple in structure, low in cost, easy to achieve and the like. For image reconstruction of the large-view-field linear scanning CT system, an optimization reconstruction algorithm based on TV minimization is constructed, projection data collected by the system can be directly reconstructed, and good noise resistance and artifact removal capacity are achieved.

The invention relates to an annular monorail mobile laser coal inventory device for a closed coal yard. The annular monorail mobile laser coal inventory device belongs to the field of mechanical equipment. The annular monorail mobile laser coal inventory device is composed of an annular rail, a driving positioning device, a coal inventory device and a driving control system. The annular monorail mobile laser coal inventory device for the closed coal yard adopts the annular monorail, can lay the annular monorail in a segmented manner according to the actual size and the scanning range of the closed coal yard, realizes coal yard full-coverage scanning coal inventory, and improves the universality of the coal inventory device; a transmission gear on a closed-loop motor shaft provided with a stroke encoder is meshed with a transmission rack, so that a driving force can be provided for the coal coiling device and can be used for automatic feedback positioning of the coal inventory device, thereby greatly simplifies the difficulty of the control system; and by adopting a mode of combining a load-carrying bearing with a guide wheel for load-carrying and positioning, effective meshing of the gear and the rack can be ensured, so that the positioning precision of the coal inventory device can be improved, thereby being capable of effectively improving the precision of scanned data, and achieving the purpose of precise coal inventory.

The invention discloses a scanning mechanism used for an optical remote sensing instrument. The scanning mechanism includes a scanning mirror assembly, a scanning mechanism support, a drive shaft assembly, a moving shaft assembly, a thin film support, a support light shade, a shaft light shade and a locking device protecting cover. The scanning mirror assembly includes a scanning mirror, a gluing bush, a flexible support and a scanning mirror support. The moving shaft assembly includes a moving half shaft, in-pair angular contact ball bearings, a switching flange, an electromagnetic locker, a bearing lock nut and a maze seal ring. The drive shaft assembly includes a drive half shaft, in-pair angular contact ball bearings, a bearing seat, a drive motor, a motor housing, a magnetic shielding shade, a round induction synchronizer, a synchronizer protection shade, a bearing locking nut and a maze seal ring. The scanning mechanism is advantaged in that the scanning rate is high and the efficiency is high; the scanning detection field is large; the scanning precision is high; the temperature adaptability is good; the structure is simple; the reliability is improved since direct drive is adopted and use of a speed reduction mechanism with a complex structure is avoided.

The invention discloses a prostate puncture surgical robot based on ultrasonic image navigation. The prostate puncture surgical robot comprises a seven-degree-of-freedom pose adjusting mechanism and a three-degree-of-freedom supporting frame mechanism. Wherein the posture adjusting mechanism comprises a posture adjusting module capable of realizing accurate positioning, a probe adjusting module for controlling the probe to automatically position, rotate and feed, and an end effector for realizing a puncture function. The posture adjusting module adopts a multi-joint coupling algorithm to control a remote center motion point, two rotating plates are restrained through rotation to form a connecting rod mechanism, and the angle between the two rotating plates is changed through driving of a holder motor, so that virtual fixation of the remote center motion point is achieved. The supporting frame mechanism for achieving large-range movement of the pose adjusting mechanism in the space comprises a moving module for achieving X-axis and Y-axis movement and a lifting module for achieving Z-axis up-down lifting. Under ultrasonic image navigation, automatic rotary feeding and pose adjustment of the ultrasonic probe can be achieved, accurate positioning is carried out, a large-range prostate scanning view can be obtained, the biopsy tissue sampling range can be expanded, meanwhile, automatic needle insertion of a puncture needle can be achieved, fatigue of doctors can be effectively relieved, and the working efficiency of the doctors is improved. And the surgical precision, the surgical efficiency and the surgical safety are improved to a certain extent.

The invention provides a wide-field CT (computed tomography) imaging method with different three-source circular orbit radiuses. The method has the features of multi-source CT imaging, allows an enlarged imaging field under same equipment and enables larger size object to be detected to be rebuilt. The method includes: a wide-field scanning mode with different three-source circular orbit radiuses and a backprojection filtration algorithm with no need for data rearrangement, wherein three fan-beam groups all have truncations, and initial phase differences of three ray sources are different; rebuilding precision is high, and rebuilding speed is high. This method can provide important theoretical basis and technical reference for the research and development of a three-source CT system.

The invention relates to a closed coal yard U-shaped monorail mobile laser coal inventory device. The device comprises a U-shaped monorail 1 erected on a steel structure ceiling of a coal yard, and acoal inventory instrument trolley which is used for moving along a rail route to inventory coal in the whole coal yard is arranged on the U-shaped monorail in an inverted mode. And the coal inventoryinstrument trolley is provided with a coal inventory instrument device for carrying out actual specific full-coverage scanning coal inventory on the whole coal yard. A U-shaped monorail laser scannerwith an omnidirectional holder is adopted, during coal inventory scanning, two different modes of inner-ring scanning and outer-ring scanning are selected, internal and external sites covered by the U-shaped monorail can be completely scanned in the process that the trolley walks back and forth, the laser coal inventory instrument is not limited by coal yard conditions any more; and meanwhile, theU-shaped monorail can be laid in a segmented mode according to the actual size and the scanning range of the closed coal yard, track cost is saved, installation difficulty is reduced, and universality of the coal inventory device is enhanced.

The invention provides a laser radar scanning system, an angle beam expanding device and application thereof. The laser radar scanning system comprises at least one light source assembly, a scanning device and at least one angle beam expanding device. The light source assembly generates at least one laser beam, wherein the scanning device reflects the laser beam at a scanning angle, and the anglebeam expanding device amplifies the scanning angle of the laser beam and projects the laser beam outwards. The angle beam expanding device comprises at least one angle expanding device and a light condensing device, wherein the angle expanding device amplifies the scanning angle of the laser beam reflected by the scanning device and maintains the collimation of the laser beam, and the angle expanding device projects the laser beam with the amplified scanning angle outwards so as to expand the detection field of view of the laser radar scanning system.

The embodiment of the invention discloses a laser positioning system and method based on an AGV. The laser positioning system based on the AGV comprises a scene map which comprises at least two presetposition points and at least two reflective marker groups which are respectively fixed at the at least two preset position points, wherein each reflective marker group comprises at least two reflective markers, and the reflective markers in different reflective marker groups are different; one reflective marker group comprises information of a preset position point; the reflective marker group isused for acquiring the preset position point information after being scanned by a laser scanner of the AGV. Compared with technologies of the prior art, different position points in the scene map aredistinguished on the basis of relatively low cost, and therefore the AGV or the position of the target point is positioned.

The invention provides a tire zero point positioning method. A testing machine comprises a main body frame, two conveying belts located between the main body frame and a centering rotating mechanism for driving a tire to rotate at a fixed point. The positioning method comprises the steps of 1, positioning a tire through the centering rotating mechanism; 2, scanning the tire through a bar code scanner; 3, carrying out image filtering treatment; 4, positioning the straight line information through hough transformation; 5, acquiring the central position of the bar code; 6, calculating the offsetof the center position of the bar code relative to the center line positions of the two conveying belts; and 7, controlling the tire to rotate according to the offset. Due to the fact that the scanning visual field of the bar code scanner is large, one bar code scanner can achieve reading of the tire bar code and bar code zero point positioning. The control mode is simple and convenient. The tirespecification is replaced without adjusting the position. The extra hardware cost is not needed, and the zero point positioning cost is reduced.

The invention relates to an image space scanning optical system based on a curved prism, which is used for solving the defects of complex structure and large size of an optical system in the prior artwhen the optical system meets the requirements of a large field of view and a large detection distance. The system comprises a telescopic structure, a swing mirror, an imaging optical lens group anda detector which are arranged along an optical path, wherein the telescopic structure is a curved prism; the curved prism can turn back the optical path, and light entering and exiting the curved prism is parallel light; and the swing mirror is used for realizing image space scanning through rotation, and imaging the detector through the imaging optical lens group. One application of the inventionis infrared imaging guidance.

The invention discloses an automatic vehicle body measuring device based on visual tracking, and relates to the technical field of railway passenger vehicle body measurement. The automatic vehicle body measuring device comprises a high-precision binocular vision measuring system, a guide rail movement control system, a photogrammetry camera tracking system and a robot. The technical problems of poor measurement precision, low efficiency and high cost in the prior art are solved, low-cost automatic precision measurement is realized, measurement data are automatically stored, and an electronic detection report can be generated.

The invention discloses a rotary full-view laser radar scanning system which comprises an AHRS module, a GPS module, an MCU module, laser radar, a motor and a grating encoder module which are installed at the end of a rotary structure. The system further comprises an energy supply module, a radar driving module, a motor driving module and an ARM main operation module. The energy supply module is connected with the MCU module, the ARM main operation module, the motor driving module and the radar driving module. The MCU module is connected with the grating encoder module, the AHRS module, the GPS module and the motor driving module. The motor driving module is connected with the motor; the radar driving module is connected with the laser radar; and the ARM main operation module is connectedwith the motor driving module, the radar driving module, the MCU module and the motor. According to the system, laser point cloud data acquisition of a whole three-dimensional space is effectively completed in a single-point static state.

The invention relates to a laser radar and its laser pulse timing adjustment method. By continuously adjusting the set threshold and / or the minimum time interval between adjacent laser pulses, there are at least A Lissajous scanning point can effectively obtain the emission timing of the laser pulse and the mapping relationship with the pixel position. When laser pulses are emitted according to this sequence, the target can be scanned stably and uniformly, which overcomes the shortcomings of Lissajous scanning such as sparse center and dense surrounding, thus making the scanning result clearer.

A front scanning probe capable of increasing an MEMS-OCT scanning imaging field angle comprises an optical fiber 1, a lens 2, a reflecting device 3, an MEMS micromirror 4, a first optical window 5-1 and a closed cavity 6, the closed cavity 6 is filled with a liquid substance 7, the MEMS micromirror 4 is immersed in the liquid substance 7, light emitted by the optical fiber 1 sequentially passes through the lens 2, the reflecting device 3 and the MEMS micromirror 4, and the first optical window 5-1 is formed in the closed cavity 6. And the light reaches the first optical window 5-1 through the liquid substance 7 to be refracted and then is emitted out. The MEMS micro-mirror has the advantages that through the refraction effect of the liquid, the scanning view field of the MEMS probe is improved, and meanwhile the MEMS micro-mirror is protected through the damping effect of the liquid.

The invention provides an automatic balancing device, tomography equipment and an automatic balancing method. The automatic balancing device comprises a base, a rotary substrate, a ray emission assembly, a ray detection assembly and two counterweight assemblies, the rotary substrate has a radial direction and a tangential direction perpendicular to the radial direction, the ray emission assembly and the ray detection assemblies are oppositely installed on the rotary substrate in the radial direction, the ray detection assembly can move in the tangential direction, the two counterweight assemblies are symmetrically arranged on the rotary substrate with the radial direction as a symmetric line, and the counterweight assemblies are obliquely arranged relative to the radial direction. The detection assembly has a plurality of scanning view fields in the process of moving along the tangential direction, and a plurality of scanning view fields can be superposed and fused to obtain the overall image information of a scanned object so as to expand the scanning view field of the automatic balancing device and increase the imaging area of the scanned object.

The invention provides a folding type multi-dimensional unfolding mechanism for a spatial load. The folding type multi-dimensional unfolding mechanism mainly solves the problems that an existing reflector antenna needs to occupy a large envelope space, the carried load is small, and star layout is difficult. The mechanism comprises a folding and unfolding module, a main connecting rod, an auxiliary connecting rod, an auxiliary reflection mounting module, a main reflection mounting module, a main locking module and an auxiliary locking module, the folding and unfolding module is arranged at the edge position of the star cabin plate and is used for realizing 180-degree overturning of the auxiliary connecting rod; the auxiliary reflection installation module comprises an auxiliary reflection support and an auxiliary reflection motor and is used for achieving rotation motion of the main connecting rod. The main reflection mounting module comprises a main reflection bracket and a main reflection motor and is used for realizing self-rotation of the main reflector antenna; the main locking module comprises a main elastic releasing device, a main locking column and a main locking device pressing plate and is used for achieving position locking of the main connecting rod. The auxiliary locking module comprises an auxiliary elastic releasing device, an auxiliary locking column and an auxiliary locking device pressing plate and is used for achieving position locking of the auxiliary connecting rod.

The invention discloses an oblique 45-degree mirror optical scanning device for a laser radar. The device comprises a laser emitting unit for exciting laser, a laser receiving unit for receiving reflected laser, and a rotary scanning unit for deflecting the emitted laser to form a scanning section; and the rotary scanning unit comprises a scanning mirror forming an angle of 45 degrees with emergent laser excited by the laser emitting unit, and a driving device for driving the scanning mirror to rotate. The principle of the invention lies in that the driving device is utilized to drive the scanning mirror to rotate, so that the emergent laser is reflected to different angles to form a larger scanning section.

The invention discloses an offset panel PET (Positron Emission Tomography) system and a preprocessing method of projection data, belonging to the technical field of medical treatment. The offset panel PET system comprises an optical experimental platform and two panel PET detectors, wherein the optical experimental platform is positioned in the middle and carries a detected object; the two panel PET detectors are arranged at two sides of the optical experimental platform and are offset relative to the axis of the optical experimental platform. The preprocessing method of the projection data obtained by adopting the offset panel PET system to scan is that projection data X(u, v and lambda) acquired by the panel PET detectors are multiplied by a preprocessing function omega (u) to obtain new projection data. The offset panel PET system disclosed by the invention is adopted for scanning to at most obtain a scanning view field of which the area is four times that of an existing panel PET system; in addition, projection data of each angle, obtained by rotating the panel detectors from 1 degree to 360 degrees are unique and effective. According to the preprocessing method of the projection data, artifact can be effectively removed, obtained new projection data for three-dimensional tomography image reconstruction are more accurate, and a reconstructed image is clearer.