JP2567698Y2 - Laser scanning device with ranging function - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a laser scanning device for construction work that can perform distance measurement by light waves coaxially with a laser beam.

<Prior Art> A laser scanning device that emits a laser beam to display a point or a line is mainly used for automation in a factory.

The principle is that, as shown in Fig. 3, a scanner for determining the X axis and the Y axis is provided, and the direction of the laser beam irradiation is changed by slightly changing the angle of the reflecting mirror of each scanner by a command from a computer. It is configured to indicate a predetermined position by changing it.

<Problems to be Solved by the Present Invention> In such an FA device, there is no requirement to measure the distance because it is used for processing a product.

However, distance measurements are indispensable when using such devices for construction work targeting large spaces.

For this purpose, a device having a configuration in which a distance measuring device is attached to the side surface or the vicinity of the laser scanning device and scanning by a laser and distance measuring by a light wave are performed in different systems is conceivable.

However, in a structure in which two types of surveying devices (laser oscillation device and light wave distance measuring device) are combined, the same optical axis is not used, and position correction and the like are required.

<Purpose of the present invention> The present invention has been made to solve such a problem, and provides a laser scanning device for construction work that can perform two types of measurements using the same optical axis. The purpose is to do.

<Means for Solving the Problems> That is, the present invention provides a scanner mirror for X-axis identification on the optical axis of a laser beam from a laser oscillator,
An apparatus for construction work in which a scanner mirror for Y-axis identification is arranged, and information for specifying the X and Y coordinates of a point to be measured can be input to each scanner. A light wave rangefinder is placed at a position where the optical axes intersect at an angle of degrees, and at the intersection of the two optical axes, an angle of 45 degrees to both optical axes, and the transmission surface on the back side of the reflection surface to the laser oscillator Place the translucent mirror with the camera turned,
The laser beam from the laser oscillator and the light from the optical distance meter are shared by a reflector of the scanner for X-axis identification and a reflector of the scanner for Y-axis identification at a predetermined position on the irradiation surface of the object to be measured. The laser beam is emitted through the optical axis, the laser beam from the laser oscillator is applied to a predetermined position of the two-dimensional coordinate on the irradiation surface of the object to be measured, and the light from the lightwave distance meter is converted into a frequency or pulse signal. After irradiating a predetermined position on the irradiation surface of the object to be measured, it returns to the optical distance measuring instrument on the common optical axis in a direction opposite to the irradiation direction and returns to the predetermined position of the two-dimensional coordinates of the irradiation surface of the object to be measured. This is a laser scanning device having a distance measuring function for measuring a distance.

<Description of the present invention> The present invention will be described in detail below.

<A> Laser oscillator 1 X is placed on the optical axis of the laser beam from laser oscillator 1.
A reflector SX of the scanner for specifying the axis and a reflector SY of the scanner for specifying the Y axis are arranged.

Each scanner is configured so that information for specifying the X and Y coordinates of the measurement point can be input from a computer.

 Such a configuration is the same as the conventional one.

<B> Lightwave distance measuring instrument In the device of the present invention, the lightwave distance measuring instrument 2 is further arranged.

Lightwave rangefinder 2 has infrared or laser beam,
There are (1) a device for measuring the light wave signal from the return of the light from the reflecting mirror, and (2) a device for mounting the pulse signal and directly measuring the light from the pulse without the reflecting mirror.

 In the case of the present invention, both can be used.

When the lightwave distance finder 2 is arranged, the optical axis of the lightwave emitted from the lightwave distance finder 2 is configured to intersect the optical axis of the laser beam at an angle of 90 degrees. <C> Arrangement of translucent mirror Laser The translucent mirror 3 is arranged at the point where the beam and the light intersect.

This translucent mirror 3 has a reflection surface similar to a normal mirror,
In addition, the structure is such that strong light from the back surface is transmitted.

Therefore, if the rear surface of the translucent mirror 3 is directed toward the laser oscillator 1 and is provided at an angle of 45 degrees with respect to both optical axes, the laser beam passes through the rear surface of the translucent mirror 3 with strong light and travels straight. On the other hand, the light wave of the light wave distance measuring instrument 2 which is weak light is reflected on the reflecting surface.

Therefore, the two optical axes coincide and travel straight on the same axis. In this case, the light wave and the laser beam do not interfere with each other.

This is because the light wave generates a frequency or pulse signal. Laser beams, on the other hand, emit a visible laser directly.

As described above, since the two have different wavelengths, waveforms, and energies, light waves can pass even if they are coaxial, so that it is possible to measure the distance by receiving the reflected light waves.

On the optical axis of the laser beam, there is an XY scanner reflector S
Since X and SY are located, the direction of the light wave from the lightwave range finder 2 is also controlled integrally, so that a predetermined point can be displayed and at the same time the distance to that point can be measured.

<Effect of the present invention> Since the present invention has the above-described configuration, the distance to the surface irradiated with the laser beam can be measured immediately.

Therefore, since the distance is known in addition to the two-dimensional coordinates by the laser beam, the three-dimensional coordinates of the irradiation surface can be obtained.

Therefore, it is very effective to apply to the surveying technology for confirming the shape of the irradiation object in the large space of the construction work.

[Brief description of the drawings]

FIG. 1: Illustration of the principle of the configuration of the present invention FIG. 2: Illustration of the arrangement of the translucent mirror FIG. 3: Illustration of an example of a conventional laser scanning device

 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Mayumi Shiro 1-25-1, Nishi-Shinjuku, Shinjuku-ku, Tokyo Taisei Corporation Co., Ltd. (56) References JP-A-1-100491 (JP, A) JP-A JP-A-60-253812 (JP, A) JP-A-50-28356 (JP, A)

Claims (1)

(57) [Scope of request for utility model registration] An X-axis identifying scanner mirror and a Y-axis identifying scanner mirror are arranged on the optical axis of a laser beam from a laser oscillator, and each scanner has a point to be measured. In the construction equipment configured to be capable of inputting information for specifying the X and Y coordinates of the optical axis, an optical distance meter is disposed at a position where the optical axis intersects with the optical axis of the laser beam at an angle of 90 degrees. At the intersection of, at an angle of 45 degrees to both optical axes,
A translucent mirror is placed with the transmission surface on the back side of the reflection surface facing the laser oscillator. The laser beam from the laser oscillator and the light from the optical distance meter are reflected by the scanner for X-axis identification. The mirror and the reflecting mirror of the scanner for Y-axis identification irradiate a predetermined position on the irradiation surface of the object through a common optical axis, and irradiate the laser beam from the laser oscillator onto the irradiation surface of the object. The light from the lightwave rangefinder is converted into a frequency or pulse signal, and after irradiating a predetermined position on the irradiation surface of the object to be measured, on the common optical axis in the direction opposite to the irradiation direction. A laser scanning device with a distance measurement function that goes back to the direction and returns to the light wave distance measuring instrument to measure the distance to the predetermined position of the two-dimensional coordinates of the irradiation surface of the object to be measured.