Kabushiki Kaisha Topcon

Hiroto Shibuya

Kazuhiro Ogawa

You Sasaki

Shigeyuki Yamaguchi

Toshikazu Adegawa

Ryousuke Miyoshi

Hiroyuki Konno

Jeffrey Robert DeBoer

Kazuki Osaragi

Satoshi Hirano

Takaaki Yamazaki

Jun Sasagawa

Yohei Ogawa

Hirokazu Yamada

Kouichi Kitagata

A laser scanner measuring system is disclosed, which has a laser scanner and a calibration target. The laser scanner comprises a light emitting element for emitting a pulsed laser beam, a rotary projecting unit for projecting the pulsed laser beam, a distance measuring unit, and a control unit for driving and controlling the light emitting element and the distance measuring unit. The calibration target has a reflection sector with a known shape and with high reflectance and is installed at a known position. In use, there is a step for judging a reflected pulsed laser beam from the reflection sector by detecting a level of light quantity, a step for determining a center position of the reflection sector based on the result of the judgment, and a step for calibrating the laser scanner measuring system based on the determined center position and on the known position.

Laser scanner, laser scanner measuring system, calibration method for laser scanner measuring system and target for calibration

According to the present invention, a laser scanner measuring system, which has a laser scanner and a calibration target, wherein the laser scanner comprises a light emitting element for emitting a pulsed laser beam, a rotary projecting unit for projecting the pulsed laser beam for scanning, a distance measuring unit, which has a distance measuring light receiving unit, for measuring a distance by receiving a reflection light from an object to be measured, and a control unit for driving and controlling the light emitting element and the distance measuring unit, and wherein the calibration target has a reflection sector with a known shape and with high reflectance and is installed at a known position, comprising a step for judging a reflected pulsed laser beam from the reflection sector as received by the distance measuring light receiving unit by detecting a level of light quantity, a step for determining a center position of the reflection sector based on the result of the judgment, and a step for calibrating the laser scanner measuring system based on the determined center position and on the known position.

In a laser beam detecting device for a construction machine, a beam sensor is installed above a leveling implement of the construction machine, a laser beam is detected by the beam sensor, and information based on the beam detection is displayed on a display. A plurality of reference positions are established in a range in which the beam sensor detects the laser beam. One of the reference positions is made a standard position, while the other reference positions are made offset positions.

Laser beam detecting device for a construction machine

The present invention provides a laser reference level setting device, by which it is possible to adjust irradiating positions of a laser beam in vertical and horizontal directions with a simple arrangement and without additional manpower and to measure a tilt angle. The device comprises a laser sighting device and a target, the target having a reflection surface for indicating a given position on the target, and the laser sighting device comprising a laser oscillating device having an emitting means rotatably supported and for emitting a laser beam and a light receiving means for receiving a reflection laser beam, a driving unit for rotating at least the laser beam emitting means of the laser oscillating device, and a control unit for controlling the driving unit to direct the laser beam to a given position on the target according to the light receiving condition of the reflected laser beam reflected from the reflection surface of the target.

Laser reference level setting device

In the displaying apparatus for a construction machine with a blade having a level sensor disposed above the blade and designed such that laser beams serving as a datum is detected by the level sensor and the information based on the detected datum is displayed on a remote display, a light emitting device for signal transmission is provided for the level sensor and a light sensing device corresponding to the light emitting device is provided for the remote display, whereby the information is transmitted by means of the lightwave signal from the light emitting device to the light sensing device.

Apparatus for use in construction machines for detecting laser beam and

This invention concerns a light wave distance meter which comprises a telescope unit supported on a framework such that the unit can rotate about a horizontal axis. This unit being provided with a telescope having a target in its line of sight, with an analog photoemitter which directs modulated light emitted by an optical device at the target, and with an analog photodetector which receives modulated light reflected from said target so as to measure the distance to said target.

Growing community of inventors

Tokyo-to, Japan

Hiroto Shibuya