A geoid calculation data is collected easily. A geoid calculation data collection device of the present invention comprises an inertial measurement data acquisition part, a comparison data acquisition part, and a recording part. In the inertial measurement data acquisition part, data related to velocity, position, and attitude angle is acquired as inertially-derived data based on an output of an inertial measurement part having a three-axis gyro and a three-axis accelerometer attached to a moving body. In the comparison data acquisition part, data related to velocity is acquired as comparison data from a source other than the inertial measurement part. In the recording part, inertially-derived data and comparison data are recorded in association with each other. In the inertial measurement part, a bias stability is acquired that allows error arising from plumb line deviation to be distinguished to a predetermined degree.

The disclosure relates generally to systems and methods for providing a range from a laser range finding device. In one embodiment, the disclosure relates to systems and methods for providing a consistent ranged distance to a user of a laser range finding device.

A surveying instrument comprises a distance measuring module configured to perform a distance measurement of an objects to be measured, an optical axis deflector which is provided on a distance measuring optical axis and enables to two-dimensionally deflect the distance measuring optical axis, an arithmetic control module configured to control a deflecting action of the optical axis deflector and a distance measuring action of the distance measuring module, and a display module configured to display calculation results by the arithmetic control module, and wherein the arithmetic control module is configured to scan at least one plane of the objects to be measured in a predetermined scan pattern in at least one cycle by the optical axis deflector, to calculate parameters of the plane based on a measurement result of point cloud data acquired along a locus of a scan, and to display the calculated parameters on the display module.

A mount assembly including a rail, a mount configured to secure the rail to a surface, a laser assembly. The laser assembly includes a laser projector. The laser assembly is slidable along the rail.

The invention provides a laser scanner, which comprises a light source unit, a light receiving unit, a distance measuring unit, an angle measuring unit, a telescope unit capable of rotating in a horizontal direction and a vertical direction, a rotation driving unit, a directional angle detector, and a control arithmetic unit, wherein the light source unit is an MOPA type and has an oscillator control circuit, a main oscillator, and an optical amplifier, wherein the oscillator control circuit has a repetition frequency setting component, a pulse peak output setting component, a pulse width setting component and an amplification factor calculating component and oscillates the main oscillator corresponding to a measured distance, and wherein the amplification factor calculating component calculates an amplification factor based on a repetition frequency, a pulse peak output, and a pulse width and amplifies the optical amplifier based on a calculated amplification factor.

The invention relates to a method of controlling a track maintenance machine, particularly a switch tamping- or universal tamping machine, which moves along a track and has working units, particularly a tamping unit and a lifting unit, which are adjustable relative to a machine frame, wherein position data of track objects, particularly sleepers, rails and optionally obstacles, are recorded by means of a sensor device in front of the working units in a working direction, and wherein operating positions of the working units are determined for a working operation at a track location. In this, prior to actuation of the working units, the determined operating positions of the working units are displayed by means of a display device, wherein, prior to carrying out the working operation, the operating positions of the working units can be changed by means of control elements. As a result of the display of the determined operating positions prior to the working operation, an operator is enabled to recognize possible misalignments before these become effective.

A surveying instrument comprises a base; an alidade rotatable about a first axis relative to the base; and an optical measuring instrument having a measuring axis rotatable about a second axis relative to the alidade. A beam path can be provided for a light beam using components including a light source, lenses, mirrors, beam splitters, and a position-sensitive detector. The surveying can be calibrated by performing plural measurements at different orientations of the alidade relative to the base and different orientations of the measuring instrument relative to the alidade using the above components.

An industrial or geodetic surveying device with a scan functionality including an alidade rotating about a standing axis and a telescope unit with a beam exit for a laser measuring beam. The telescope unit is mounted on the alidade and is movable in a tilting motion about an elevation axis substantially orthogonal to the standing axis. The scan functionality comprises a scan sequence with an angular velocity of the alidade around the standing axis, wherein during the scan sequence the alidade is in a continuous revolving motion with mainly constant angular velocity about the standing axis, and the angular velocity of the alidade is faster than half of the angular velocity of the tilting motion of the telescope unit about the elevation axis.

A system and method for modeling an enclosed space involves measuring ranges and angles between a static vantage point and points on surfaces enclosing the space using a single point time of flight distance measuring device. A computer coupled to the distance measuring device generate virtual surfaces and calculates where the virtual surfaces intersect to generate a geometry for a 3D model representing the surfaces enclosing the space.

A technique facilitates selecting and designating an arbitrary one of a plurality of aerial lines. The aerial line extraction system, includes: an area-of-interest cropping unit that crops a region where an aerial line is assumed to exist as an area of interest by setting a support of the aerial line as a reference from a three-dimensional point cloud data; an element segmenting unit that segments the area of interest into a plurality of subdivided areas, obtains a histogram by counting three-dimensional point clouds existing in each of the subdivided areas, and obtains a segmentation plane of the area of interest on the basis of the histogram; and an element display unit that segments the area of interest into a plurality of segmented areas by the segmentation plane and displays the three-dimensional point clouds included in each of the segmented areas in a distinguishable manner.