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87results about "Surveying with inclination sensor" patented technology

Laser level

A laser level mount includes a mount configured to engage a support to couple the laser level mount for secure use of the laser level mount, and a base that is coupled to the mount. The base is configured to support a laser level for movement of the laser level relative to the mount along a first axis and rotation of the laser level about a second axis that is parallel to the first axis and a third axis that is perpendicular to the first axis.
Owner:TECHTRONIC CORDLESS GP

Device and method for measuring height

ActiveUS12264907B2SensorsUsing optical means
A device for measuring a height includes an inclined portion including a display, a bottom portion connected to the inclined portion, a support vertically connected to the bottom portion, and a laser device disposed in a region where the inclined portion and the support meet each other, the inclined portion, the bottom portion, and the support are connected to each other based on a shape of a right triangle when viewed from a side, the bottom portion includes a support plate for covering the bottom portion, and a switch is included between the bottom portion and the support plate.
Owner:MAGPIE TECH INC

Combination tool

The present invention discloses a combination tool including a housing defining an internal cavity, in which a laser module and a level assembly are provided. The laser module is configured to produce spot-shaped laser light and / or linear laser light. The level assembly is configured to indicate a degree of levelness. The combination tool may further include a rangefinding module and a detection module, which provide the functions of rangefinding, detecting a wood / metal component, or the like.
Owner:HANGZHOU GREAT STAR IND CO LTD

Combination tool

Disclosed in the present invention is a combination tool, comprising a shell, wherein a cavity is formed in the shell, a laser module and a spirit level assembly are arranged in the cavity, the laser module is configured to generate point laser and / or line laser, and the spirit level assembly is configured to indicate whether a surface is level. The combination tool can further comprise a ranging module and a detection module to achieve functions such as range finding and wooden- / metal-part detection.
Owner:HANGZHOU GREAT STAR IND CO LTD

Laser pocket level multi-axis micro adjust

A laser level includes a housing having a laser emitter to emit a laser along a plane. The laser level includes a mounting base connected to the housing. The housing is pivotable relative to the mounting base about three axes by a user grasping the housing and moving the housing. The housing includes a first micro-adjustment knob to adjust the housing, relative to the mounting base, about a fourth axis. The housing includes a second micro-adjustment knob to adjust the housing, relative to the mounting base, about a fifth axis perpendicular to the fourth axis.
Owner:KLEIN TOOLS INC

Building wall perpendicularity measuring device

The invention relates to the technical field of wall perpendicularity measurement, and provides a building wall perpendicularity measuring device, which comprises a mounting seat fixed at the top of a to-be-measured wall through a detachable connecting structure; the leveling platform is mounted on the mounting seat, the leveling platform comprises a guide pipe and a base, the guide pipe is mounted at the bottom of the leveling platform, and the base is mounted at the bottom end of the guide pipe; and the laser transmitter is coaxially arranged in the guide tube. When the device is used, the second power source drives the second winding wheel to wind and unwind the traction rope and drives the movable sleeve to vertically move along the guide pipe, so that the distance measuring assembly can automatically cover the full-height detection range from the top to the bottom of the wall, manual climbing or segmented measurement is not needed, the manual operation intensity is reduced, and the device is particularly suitable for high-rise high-wall scenes, and meanwhile, the detection efficiency is improved. Detection points at different heights can be accurately positioned through automatic lifting control, and the measurement efficiency is improved.
Owner:HONGYI CONSTR ENG CO LTD

Guide system for vertical shaft heading machine and vertical shaft heading guide measurement method

The guiding system for the vertical shaft heading machine comprises a total station, a first prism, a monocular camera, a plurality of second prisms, a binocular camera, feature points, an upper computer and a power supply box, the second prisms can be lightened or lightened, the field of view of the binocular camera faces downwards, the feature points can be lightened or lightened, and the upper computer is connected with the power supply box. The upper computer is in data connection with the total station, the monocular camera and the binocular camera, station setting and orientation can be conducted on the total station through known geodetic coordinates of the total station and the first prisms, geodetic coordinates of the second prisms are measured through the total station and transmitted to the upper computer, the geodetic coordinates, the initial inclination angle and the azimuth angle of the hanging scaffold are integrated, and the position of the hanging scaffold is determined. The fixed position relation of the monocular camera, the hanging scaffold and the binocular camera is calculated, then the coordinates of the binocular camera can be calculated according to the geodetic coordinates and the camera coordinates actually measured by the feature points, the precision is high, the structure is simple, and the cost is low; the vertical shaft tunneling guide measurement method provided by the invention is simple in steps, convenient to operate and high in accuracy.
Owner:TIANHE MECHANICAL EQUIP MFG +1

A horizontal marking device for real estate surveying and mapping

This invention provides a leveling device for real estate surveying, relating to the field of leveling technology. The device includes a main body comprising an adjustment platform, an angle adjustment mechanism, a locking mechanism, and a calibration component. A first level and a second level are mounted on the surface of the adjustment platform. The bottom of the first level and the surface of the adjustment platform are screwed together as a single unit. An angle adjustment mechanism is mounted on the bottom of the adjustment platform. The surface of the adjustment platform has grooves and slotted holes. This leveling device can simultaneously project two horizontal lines and quickly calculate the height difference between different horizontal lines on the same vertical plane. It offers greater flexibility, simplifies surveying tasks requiring multiple horizontal lines, and improves the stability of horizontal line illumination. It can quickly calibrate and detect the levelness of the horizontal lines projected by the two levels, thus enabling timely detection of deviations in the levels.
Owner:HUIMIN COUNTY SHENGYUAN SURVEYING & MAPPING CO LTD

Combination tool

The invention discloses a combination tool which comprises a shell, a cavity is formed in the shell, the cavity is provided with a laser module and a horizontal assembly, the laser module is configured to generate spot laser light and / or linear laser light, and the horizontal assembly is configured to indicate the horizontal condition. The combined tool can further comprise a distance measuring module and a detecting module, and the functions of distance measuring, wood / metal part detecting and the like are achieved.
Owner:HANGZHOU GREAT STAR IND CO LTD

Method and system for determining a pose for a laser instrument

Method for determining a pose for a laser instrument (12) performed by the laser instrument (12), which includes a distance measuring device (42), an angle measuring device (43, 45), and a device control unit (49), and by a supervisory device (96), which has evaluation, data processing and control functionality, is configured to perform an algorithm to determine a pose value via mathematical or numerical operation and is connected via a communication link to the laser instrument (12). The method comprises: • • second measuring points (1-2,..., 17-2) having second position data in the second coordinate frame (CF-2) are determined, • • a sequence of steps to determine a pose value via mathematical or numerical operation from the second measuring points (1-2,..., 17-2) and from the polyline (P) is performed at least once, the sequence including the following steps: • - three measuring points are selected from the second measuring points (1-2,..., 17-2), • - for the selected three measuring points an equation to determine a pose value via mathematical or numerical calculation is set up and an interim pose value is determined, • - the interim pose value is defined as the pose for the laser instrument in the first coordinate frame, or the interim pose value is compared with a stored pose value by applying a reference criterion to the interim and stored pose values and the improved pose value of the interim and stored pose values is defined as the pose for the laser instrument in the first coordinate frame, • after performing the sequence of steps, it is checked if a further sequence of steps should be performed by applying a stop criterion.
Owner:HILTI AG

Detection system for work site and detection method for work site

A detection system for a work site includes: a three-dimensional data acquisition unit that acquires three-dimensional data of the work site where a work machine operates; a current terrain data storage unit that stores current terrain data created on the basis of the three-dimensional data and time in association with each other; and a determination unit that determines whether or not there is a cliff at the work site on the basis of storage data stored in the current terrain data storage unit.
Owner:KOMATSU LTD

Deep shaft long-distance shield tunnel positioning measurement structure and measurement method

The invention discloses a deep-shaft long-distance shield tunnel positioning measurement structure and measurement method, and relates to the technical field of tunnel construction, the deep-shaft long-distance shield tunnel positioning measurement structure comprises a long-distance tunnel excavated along the underground and two deep shafts communicated with the tunnel, a fixed support is arranged at the wellhead position of each deep shaft, and a steel rope is vertically put down by the fixed support towards the direction of each deep shaft; the fixing support is movably provided with a positioning frame, the positioning frame is provided with a positioning hole for a steel rope to penetrate through, the fixing support is provided with a leveling assembly for keeping the positioning frame horizontal, the fixing support is provided with a first driving part for driving the positioning frame to move, and the side, close to the deep shaft, of the positioning frame is provided with a guide assembly corresponding to the steel rope. And infrared distancers facing the positioning frame are arranged on the fixing bracket on the two sides of the positioning frame. The first driving piece drives the positioning frame to move, the position of the steel rope in the horizontal plane of the deep shaft is rapidly adjusted, the adjusted position of the steel rope is measured and calculated again through the infrared distance meter, and it is guaranteed that the vertical datum line of directional measurement is remeasured accurately.
Owner:CHINA RAILWAY GUANGZHOU ENG GRP CO LTD +1

A surveying pole

The present inventive concept relates to a surveying pole (10) comprising: a pole arrangement (100) extending along a longitudinal axis (106) between a first end (1020) and a second end (1040), the pole arrangement (100) comprising: a first pole section (102) and a second pole section (104) telescopically arranged to provide adjustment of an extension (L, L') of the pole arrangement (100) along the longitudinal axis (106), and a target (108) internally arranged in the pole arrangement (100) at a predetermined distance (R) from the first end (1020); a top unit (110) having a center axis (112), the top unit (110) being arrangeable relative to the pole arrangement (100) for achieving a mounted state in which the top unit (110) is attached to the second end (1040) of the pole arrangement (100) such that the center axis (112) of the top unit (110) is parallel to the longitudinal axis (106) of the pole arrangement (100), and an unmounted state in which the top unit (110) is detached from the pole arrangement (100), the top unit (110) comprising: an electronic distance measurement unit (300) configured to emit a light beam (302) in a direction parallel to the center axis (112) of the top unit (110) for determining a distance to a measurement point, wherein the measurement point coincides with the target (108) of the pole arrangement (100) in the mounted state, and circuitry (310) configured to execute: in the mounted state, a pole length determination function (3112) configured to determine a length of the pole arrangement (100) based on the determined distance to the target (108), and in the unmounted state, a remote point distance determination function (3114) configured to determine a distance to a remote point coinciding with the measurement point.
Owner:TRIMBLE INC

Surveying instrument

In a surveying instrument including an instrument height measuring unit configured to make a distance measurement by emitting distance-measuring light to a distance-measuring object below a vertical axis of a surveying instrument main body, and an arithmetic unit configured to calculate a distance to the distance-measuring object by analyzing light being the distance-measuring light that has returned by being reflected by the distance-measuring object, and calculate an instrument height, the instrument height measuring unit is configured to make a distance measurement by irradiating the distance-measuring light toward a predetermined region of the distance-measuring object centered on a point below the vertical axis of the surveying instrument main body, and the arithmetic unit is configured to calculate the instrument height by operating an average value of distance-measurement values in the region. By calculating an average value of results of distance measurements of a predetermined region, the measurement accuracy can be improved.
Owner:TOPCON CORPORATION

Surveying and mapping device for service area ramp construction lofting

The invention provides a surveying and mapping device for service area ramp construction lofting, and relates to the technical field of pier center lofting and surveying and mapping, the surveying and mapping device comprises a surveying and mapping mounting piece, and the surveying and mapping mounting piece is provided with an angle adjusting piece; the angle adjusting piece is used for reflecting laser of the total station; the angle adjusting piece is provided with a proofreading piece; the proofreading piece, the angle adjusting piece and the laser of the total station are coaxial; an angle adjusting piece is mounted on the angle adjusting piece; the calibration piece is matched with the angle swing arm, the adjustment efficiency of a worker during laser surveying and mapping of the total station can be effectively improved, the tripod does not need to be moved and adjusted tediously, and the operation difficulty can be effectively reduced; the surveying and mapping device aims to solve the problems that an existing surveying and mapping device for ramp construction lofting is inconvenient to use a total station eyepiece to guide and adjust a prism through laser, and surveying and mapping point finding adjustment efficiency is low.
Owner:CHINA RAILWAY GUIZHOU ENG CORP LTD +2

A flagpole positioning method, system and device based on laser ranging telescope

The present invention relates to a flagpole positioning method, system and device based on a laser rangefinder telescope, and the method comprises: when the laser rangefinder telescope rotates to the point where the ranging light emitted by the laser rangefinder telescope faces the flagpole, the rotation information and position information of the laser rangefinder telescope are obtained, and the ranging light is analyzed to obtain the distance between the laser rangefinder telescope and the flagpole; according to the rotation information and the distance, the magnetic declination of the flagpole obtained at the same time as the distance is measured is corrected to obtain a first corrected magnetic declination; according to the rotation information, the magnetic declination is corrected in combination with a preset linear model of rotation acceleration and magnetic declination offset angle to obtain a second corrected magnetic declination; according to the position information, the distance, the first corrected magnetic declination and the second corrected magnetic declination of the laser rangefinder telescope, the position of the flagpole is analyzed to obtain the position information of the flagpole. The present invention improves the efficiency, convenience of use and positioning accuracy of flagpole positioning.
Owner:SNDWAY TECH (GUANGDONG) CO LTD

A positioning mounting structure for an azimuth reference monitoring unit

The present application belongs to the technical field of installation base, and particularly relates to a positioning installation structure for an azimuth reference monitoring unit, comprising a bearing plate and a plurality of inclination detection modules distributed along a circumferential array on the upper edge of the bearing plate, the lower edge of the bearing plate is provided with a plurality of electric telescopic rods opposite to the distribution of the inclination detection modules, a protection assembly is arranged between the lower ends of the electric telescopic rods, a brake motor is installed on the middle of the lower surface of the bearing plate along the axial direction, the output end of the brake motor is away from the bearing plate and is provided with a connecting piece, a disc connected with the connecting piece is arranged below the brake motor, a power supply assembly is arranged on the middle of the lower surface of the disc, and a plurality of distance sensors are distributed along a circumferential array on the upper edge of the disc. The positioning installation structure can be calibrated on site, and after calibration, a protection measure is formed outside the azimuth reference monitoring unit and the positioning installation structure to block rockfall, which is beneficial to improve the accuracy of the azimuth reference monitoring unit.
Owner:JIUJIANG JINGDA MEASUREMENT TECH

Surveying system and surveying method

To provide a surveying system and a surveying method that allow measurement data obtained by measuring a measurement target to be visually recognized as measurement data with a position other than a position of a measurement device as a reference, from a position other than the position of the measurement device.SOLUTION: A surveying system 1 includes a measurement device 2 and a mobile terminal 3. The measurement device 2 includes a measuring instrument 4 that measures a measurement target, an AR marker 7 having a known relationship with a measurement reference position of the measuring instrument 4, a control unit 5, and a communication unit 6. The control unit 5 is configured to convert measurement data acquired by the measuring instrument 4 into AR-marker-referenced measurement data. The communication unit 6 transmits the converted measurement data to the mobile terminal 3. The mobile terminal 3 includes a camera 11 that captures an image of the measurement target so as to include the AR marker 7, a terminal communication unit 13 that receives the converted measurement data, a terminal control unit 12, and a display unit 14. The terminal control unit 12 recognizes the AR marker 7 from the image, creates an AR image on the basis of a recognition result of the AR marker 7 and the converted measurement data, and displays the AR image on the display unit 14.SELECTED DRAWING: Figure 1
Owner:TOPCON CORPORATION

Scanning survey device

The invention relates to a scanning surveying device. A theodolite or a total station or a laser tracker having a scanning function, an alidade rotating about a vertical axis, and a telescope unit (4) having a beam outlet for a laser measuring beam (6), the telescope unit (4) being mounted on the alidade (2) and being movable in the form of a tilting movement about a pitch axis (5). The pitch axis (5) is substantially orthogonal to the vertical axis (3). The scanning function comprises a scanning sequence according to the angular velocity of the alidade (2) about the vertical axis (3), wherein during the scanning sequence, the alidade (2) performs a continuous rotational movement about the vertical axis (3) at a substantially constant angular velocity, and the angular velocity of the alidade (2) is faster than half the angular velocity of the tilting movement of the telescope unit (4) about the pitch axis (5), in particular, the angular velocity of the alidade (2) is faster than the angular velocity of the tilting movement of the telescope unit.
Owner:LEICA GEOSYSTEMS AG

Laser guide for installing electrical pipe

The laser alignment device enables precise alignment of electrical metallic tubing (EMT conduit) by projecting a laser beam coaxially aligned with the conduit's central axis. The device features a housing, a laser guide, at least two feet, and a spring mechanism that centers the laser guide automatically to a center of the EMT conduit when attached. In one embodiment, the feet are biased inward to grip the exterior surface of the conduit, while in another, they are biased outward to engage the interior surface. The laser beam indicates the conduit's projected path, allowing electricians to align conduits, mark drilling locations on ceilings or sidewalls, and avoid obstructions. Horizontal or vertical laser lines provide accurate visual guides, eliminating manual measurements and reducing errors caused by irregular structures. The device streamlines installation, ensuring seamless alignment and efficient conduit routing in complex environments. Its durable, adjustable design accommodates various conduit sizes and configurations.
Owner:GUERRA JR DANIEL F

Cylinder extrusion head axis positioning detection device and positioning method

The application discloses a cylindrical extrusion head shaft center positioning detection device and a positioning method, relates to the technical field of power batteries, and has the advantages of simple structure, including a supporting assembly, the supporting assembly including a table top and two rotating rollers for adjusting the table top to always keep horizontal, automatic adjustment of the shaft center of the extrusion head to a horizontal state can be realized through the action of the device, the mechanical structures are combined to facilitate the installation operation of the overall structure, the application can meet the measurement needs of different cylindrical extrusion head diameters under the action of the telescopic positioning rod, compared with the deviation between the actual extrusion position of the extrusion device and the specific position of the battery cell in the extrusion process in the prior art, the application can adjust the position of the extrusion device in real time, ensure that the actual position of the extrusion head is consistent with the to-be-extruded position of the extrusion object, and thus the accuracy of the analysis and evaluation of the extrusion capacity of the battery in different directions can be improved.
Owner:HEFEI GUOXUAN HIGH TECH POWER ENERGY

Binocular telescope

ActiveUS12429683B2Angle measurementTelescopesRoof prismTelescope
A binocular telescope includes a pair of Schmidt-Pechan roof prisms, one half pentaprism, a right-angle prism, a main circuit board, and an auxiliary circuit board. The half pentaprism is connected to a lateral surface of another half pentaprism, and includes a lateral surface substantially faces the other half pentaprism. The right-angle prism includes one lateral surface connected to the lateral surface of the half pentaprism, and another lateral surface whose normal is perpendicular to the normals of the lateral surfaces of both the half pentaprism and the another half pentaprism. A light emitter and a light receiver of the auxiliary circuit board are arranged above the another lateral surface of the right-angle prism and electrically connected with the main circuit board respectively. Therefore, the binocular telescope is arranged in a centralized manner, so that the complexity in production and maintenance is effectively reduced.
Owner:FOSHAN NANHAI WEIHONG MOULD MFG CO LTD

Laser leveling device

The present application relates to a laser leveling device comprising: a bracket assembly, a pendulum (114) disposed in the bracket assembly, and a locking device (200) comprising a safety lock (210) and a locking arm (220), wherein the locking arm is attached to the bracket assembly and selectively engaged with the pendulum, and is configured to: pivot relative to the bracket assembly around a pivot axis extending in a first direction perpendicular to a vertical direction between a locking position and a releasing position in response to receiving an external input to switch the laser leveling device from one of an OFF state and an ON state to the other, and the locking arm is configured to be engaged with the pendulum in the locking position to fix the pendulum and disengaged from the pendulum in the releasing position to allow the pendulum to move, and wherein the safety lock is attached to the locking arm and is engaged with the bracket assembly selectively so as to prevent the locking arm (220) from moving from the locking position to the releasing position without receiving an external input to switch the laser leveling device from the OFF state to the ON state.
Owner:ROBERT BOSCH GMBH +1

Building auxiliary device and building method for discontinuous wall of food workshop

The invention relates to the field of food workshop construction engineering, in particular to a food workshop discontinuity wall construction auxiliary device and a construction method.The food workshop discontinuity wall construction auxiliary device comprises a rack and is characterized by further comprising leveling laser heads arranged on the two sides of the bottom of the rack, and the distance between the two leveling laser heads is smaller than the half-wall width; the collimation laser head is arranged at the top of the rack; multiple rows of rollers are arranged at the two ends of the bottom of the auxiliary vehicle to drive the auxiliary vehicle to slide along the tops of the half walls; laser receiving assemblies are arranged at the two ends of the top and the bottom of the auxiliary vehicle respectively, the laser receiving assembly at the top of the auxiliary vehicle corresponds to the collimation laser head, and the laser receiving assembly at the bottom of the auxiliary vehicle corresponds to the leveling laser head; and the auxiliary positioning assembly is arranged at the bottom of the auxiliary vehicle and assists in determining the connecting part of the half wall and the discontinuous wall. The construction method has the effects of increasing the construction efficiency of the discontinuous wall and adapting to the thickness of the half wall and the discontinuous wall.
Owner:QINGDAO XIANYOU FOOD CO LTD

Foundation construction laser leveling control device based on dynamic leveling

The invention discloses a foundation construction laser leveling control device based on dynamic leveling. The foundation construction laser leveling control device comprises a laser reference unit and a construction end control unit. The laser reference unit is provided with a direct-drive holder attitude stabilization platform and an inertial measurement unit, the inner ring control frequency is not lower than 200Hz, a laser reference plane can be kept horizontally stable when a base vibrates or the attitude changes, an environment and refraction compensation module is arranged, and the refractive index gradient is estimated and the measurement error is corrected in real time through a temperature sensor, a humidity sensor and an air pressure sensor. The construction end control unit comprises a multi-source sensing and state estimation module and a prediction control module, and based on extended Kalman filtering, a laser receiver, inertial measurement and positioning data are fused, and the knife edge height state quantity is output. The device effectively solves the problems of reference deviation and height errors caused by foundation vibration, equipment shaking and atmospheric refraction in the construction process of a traditional device, and the leveling precision and the dynamic stability are remarkably improved.
Owner:HENAN HOUGUANG CONSTRUCTION ENGINEERING CO LTD

Indoor comprehensive pipeline installation device based on BIM technology and use method

The invention discloses an indoor comprehensive pipeline mounting device based on a BIM technology and a using method, and belongs to the technical field of building construction. The device comprises an upper base and a lower base, and the upper base and the lower base are connected through a horizontal adjusting spiral assembly; a device main body is fixed on the base, and a vertical hollow groove and a convex groove are formed in the device main body; the convex groove is connected with a telescopic box staff in a clamped mode through a sliding strip, the infrared emitting device comprises a convex ring, a mounting rod and a laser pen, and the convex ring is embedded into a clamping groove of the vertical hollowed-out groove. The problems of precision control and operation complexity in the existing indoor comprehensive pipeline installation process are solved, the precision problem in the pipeline installation process is solved by combining the modern BIM technology and precision mechanical design, the operation process is simplified, the adaptability and flexibility of the device are enhanced, and the working efficiency is effectively improved.
Owner:CHINA MCC17 GRP CO LTD

Surveying instrument

The present disclosure provides a surveying instrument. The surveying instrument comprises a center unit comprising an optical device and a front lens. The optical device is arranged to emit and / or receive light through the front lens along an optical axis (OA) of the center unit. The surveying instrument further comprises an alidade on which the center unit is rotatably arranged about a first axis (A1). The alidade comprises a tilt sensor arranged along a second axis (A2). The second axis is orthogonal to the first axis. The alidade further comprises an optical arrangement arranged to form an optical path from a first side of the alidade to an aperture arranged along the second axis at a second side of the alidade. The optical path bypasses the tilt sensor. The center unit is rotatable about the first axis to a predetermined rotational position (P1), in which the optical axis aligns with the optical path such that the optical device is arranged to emit and / or receive light through the aperture along the second axis.
Owner:TRIMBLE INC

Laser level interface and control

Various laser level designs and remote controls are shown. In another example, the remote control for a laser level receives a plurality of interface protocols configured to control one or more laser levels, and subsequently selects one of the interface protocols when initiating control of a laser level. In another example, the relative positions a remote control with respect to a laser level are determined, and subsequently a visual representation is presented at the remote control based on the relative positions.
Owner:MILWAUKEE ELECTRIC TOOL CORP

surveying instrument

The invention relates to a surveying instrument (100). The surveying instrument comprises a central unit (110) comprising an optical device (120) and a front lens (112). The optical device is arranged to emit and / or receive light through the front lens along an optical axis (OA) of the central unit. The surveying instrument further comprises an alidade (130), the central unit being rotatably arranged on the alidade about a first axis (A1). The alidade comprises a tilt sensor (132) arranged along a second axis (A2). The second axis is orthogonal to the first axis. The alidade further comprises an optical arrangement (134) arranged to form an optical path (136) from a first side of the alidade to an aperture (138) arranged on a second side of the alidade along the second axis. The optical path bypasses the tilt sensor. The central unit is rotatable about the first axis to a predetermined rotational position (P1) at which the optical axis is aligned with the optical path such that the optical device is arranged to emit and / or receive light through the aperture along the second axis.
Owner:TRIMBLE NAVIGATION LTD

Auto centring levelling

The invention relates to a surveying system comprising a surveying instrument, a control system, a tilt measuring system, a levelling unit, a camera system, a second distance meter, wherein the control system is configured for at least one of receiving and determining an image position of a captured image, the image position corresponding to a location on the ground, effecting the levelling unit to adjust a tilt status of the surveying instrument, based on the image position, until a first tilt status is obtained, the second distance meter aiming onto the location on the ground in the first tilt status, effecting the tilt measuring system to determine the first tilt status, storing the determined first tilt status, effecting the second distance meter to measure a distance to the location on the ground, storing the measured distance to the location on the ground, effecting a first angle encoder of the surveying instrument to measure a rotatory position of a support unit of the surveying instrument, storing the measured rotatory position of the support unit, effecting the levelling unit to adjust the tilt status, based on sampling the tilt measuring system, until a second tilt status is obtained, the yaw axis being aligned with the gravity field in the second tilt status, calibrating a preconfigured centre point of the surveying instrument based on the distance to the location on the ground, a deviation between the first tilt status and the second tilt status, the rotatory position of the support unit.
Owner:LEICA GEOSYSTEMS AG