JP2596971Y2 - Laser beam center point display - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laser beam center point display device for measuring verticality using a laser beam in the fields of civil engineering and construction.

[0002]

2. Description of the Related Art Recently, in a high-rise building construction, etc., a method of measuring the verticality using a laser beam has been often adopted, but the laser beam has a certain area, and the area is proportional to the distance. In a high-rise building or the like, the spot of the laser beam moves from point to point due to shaking of the structural building or the like. Therefore, accurate verticality cannot be measured unless the center point is obtained. Conventionally, as a method of determining the center point of a laser beam in this type of verticality measurement, there are (1) a method of directly receiving a laser beam on a semi-transparent scale plate or the like and measuring the center point by visual measurement from the trajectory of the laser beam; (2) A method in which the light receiving means is constituted by a light emitting diode or the like, and a laser beam detection position is determined by displaying the light emitting diode. -Y Two-dimensional display method has been adopted.

[0003]

In the above-mentioned prior art, the method (1) has the drawback that the individual difference of the measurer is large due to eye measurement, and that it is not good for occupational hygiene because the laser beam is directly viewed. The method (2) has a drawback that it is impossible to display an accurate position in a unit of mm because the miniaturization of the light emitting diode is limited, and these methods cannot accurately determine the center of the laser beam. on the other hand,
In the method (3), the light receiving position is electronically processed and displayed on the XY coordinates of the external display device.
The center point can be displayed accurately on the coordinates as compared with the method described in the above, but since the light receiving means and the external display device are located at different positions, the deviation of the light receiving center point from the vertical position is determined by this method. There is a disadvantage that unlike the cases (1) and (2) above, it is not possible to directly access the display position and use that position as a reference point for blackout or the like.
Therefore, any of the conventional methods has a disadvantage that the center point of the laser beam cannot be accurately specified or fixed and cannot be visually observed, and the verticality cannot be obtained accurately. And the like, there is a problem that it is difficult to accurately move the reference point of the reference floor to the upper floor.

[0004] The present invention solves such a problem, and provides a means for accurately and easily relocating a reference point of a reference floor to an upper floor, for example, in a construction work, excluding an artificial element. The center point of the laser beam,
It is another object of the present invention to provide a laser beam center point display device which is displayed coaxially with the light receiving position at the same position and can use the displayed laser beam center point directly as a reference point.

[0005]

Laser beam center points display device of the present invention to solve the above problems SUMMARY OF THE INVENTION The light receiving means is constituted by an optical sensor for sensing a laser beam, a display comprising a liquid crystal display panel for displaying the light receiving position Means and the light receiving means
Laser light receiving position
Arithmetic processing of the central part of the beam
An arithmetic processing unit for replacing the original coordinates with the original coordinates and outputting to the display means , wherein the light receiving means and the display means are on the same vertical line.
Match the coordinate origin is integrally fixed, the receiving center points of the laser beam of light received by the light receiving unit on the display unit
It has a configuration characterized in that it is displayed coaxially with the optical means .

It is desirable that the arithmetic processing section is provided integrally with the housing together with the light receiving means and the display means.

[0007]

The laser beam oscillated in the vertical direction from the laser oscillator travels straight with a certain area, is sensed by the light sensor of the light receiving means, and its position is calculated by the arithmetic processing unit in XY.
The center position is obtained by substituting the coordinates, and the position is displayed on the display means. Therefore, since the center point is obtained by the arithmetic processing without being artificial, the center point can be obtained accurately. In particular, in the present invention, the light receiving means receiving the laser beam and the liquid crystal display surface have the same coordinate origin on the same vertical, so that the display means is displayed on the display means as if the laser beam was directly viewed. Since the determined center position immediately matches the actual center point, the displayed point can be directly accessed and used as a reference point for blackout or the like.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to FIGS. FIG. 1 shows a state in which a laser beam center point display device 1 according to the present embodiment is installed on an upper floor to obtain verticality, and FIG. 2 is a schematic configuration diagram showing an internal configuration thereof.

As shown in FIG. 2, a laser beam center point display device 1 according to this embodiment has a light receiving means 3 and a liquid crystal display as a display means in a casing 2 formed of an appropriate material such as plastic or metal. The board 4 and the arithmetic processing means 5 are integrally provided.

The light receiving means 3 has a large number of optical sensors arranged in a plane in a cylindrical or polygonal cylindrical hood 6 integrally formed on the lower surface of the casing 2 or separately attached thereto. With this configuration, the laser beam receiving position can be accurately detected. Reference numeral 7 denotes a filter provided to cut weak light.

The liquid crystal display panel 4 displays the center position of the laser beam detected by the light receiving means 3 on a liquid crystal display screen by calculating processing means, which will be described later. It has an XY coordinate plane similar to the Y coordinate, and is provided on the upper surface of the casing so that the coordinate origin coincides with the coordinate origin of the light receiving means 3 on a vertical line (that is, has a common Z axis). Have been. Although it is difficult to completely match the coordinate axes of the light receiving means and the liquid crystal display panel mechanically on a vertical line, the coordinate axes of the liquid crystal screen are electronically set by a program, so that after the assembly of the device is completed. By adjusting the coordinate axes in the software, it is possible to achieve a perfect match.

The arithmetic processing means 5 is composed of a microprocessor, detects a light receiving position and performs data processing based on a signal from the optical sensor that has detected the laser light of the light receiving means 3, and performs arithmetic processing on the central part of the laser light. The laser beam center position is replaced with XY two-dimensional coordinates, and the liquid crystal display panel 4
Output. In the embodiment shown in FIG. 2, the arithmetic processing means 5 is provided between the light receiving means 3 and the liquid crystal display panel 4 in the form of a sandwich. And may be provided separately in some cases.

The housing is provided with a plurality of height adjusting screws 8 and, if necessary, any level adjusting means such as a level so that the housing can be installed horizontally at the measuring position.

The laser beam center point display device of this embodiment is constructed as described above, and the case where the reference point of the reference floor is moved to the upper floor in the blackout of the building using this device will be described. The laser oscillator 10 is accurately installed at the reference point of the reference floor 11 so that the laser beam oscillates in the vertical direction, and the laser beam center point display device 1 is received on the rising floor 13 fixed to the column or wall 12. The means 3 is installed so as to face the laser oscillator 10.

A laser beam 14 emitted in a vertical direction from a laser oscillator 10 installed on a reference floor travels straight with a fixed area, passes through a filter 7 of the laser beam center point display device 1 and is received by a light receiving means 3. The area and position are sensed. The light receiving unit 3 measures the laser beam 14 a plurality of times to reduce errors due to fluctuations of the laser beam 14 and vibrations of the laser oscillator 10 and the laser beam center point display device itself, and from the measured positions and sizes, The average value of the center point is replaced with two-dimensional coordinates to be a final value, which is displayed on the liquid crystal display panel 4 fixed integrally with the light receiving means.

Since the light receiving means for receiving the laser beam and the liquid crystal screen have the same coordinate origin on the same vertical,
The displayed center position is the immediate reference point. Therefore, black ink can be directly aligned with the displayed center position and blacked out, and blacking can be performed accurately and easily without requiring skill compared with the related art.

[0017]

Advantageous Effects of the Invention The laser beam center point display device of the present invention is constructed as described above, and has the following special effects.
Since the center point of the laser beam is displayed on the display means, and the light receiving means and the display means coincide with the coordinate origin on the same vertical line, the displayed center position is immediately the actual laser beam center position. The center position of the laser beam can be accurately obtained without requiring any artificial judgment such as the experience and intuition of the user.

Since the center position of the laser beam displayed on the liquid crystal surface coincides with the actual center point, the displayed center position is directly accessed, and the point is directly used as a reference point. Thus, the reference point can be easily and accurately obtained in a short time without skill, and the vertical can be obtained with higher accuracy in high-rise building construction and the like than in the past.

Further, since the observation of the screen and the blackout operation can be performed by the same person, labor saving can be achieved as compared with the related art.
Further, since there is no need to directly observe the laser beam, it is safe in terms of occupational health.

By constituting the display means with a liquid crystal panel, the entire apparatus can be made compact and lightweight.

[Brief description of the drawings]

FIG. 1 is a schematic side view of a laser beam center point display device according to an embodiment of the present invention in a verticality measurement state.

FIG. 2 is a schematic sectional view in that state.

[Explanation of symbols]

Reference Signs List 1 laser beam center position measuring device 2 casing 3 light receiving means 4 liquid crystal display panel (display means) 5 arithmetic processing means (microprocessor) 6 hood 7 filter 8 height adjusting screw

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-69515 (JP, A) JP-A-2-168766 (JP, A) JP-A-63-217213 (JP, A) JP-A-62-1987 269010 (JP, A) (58) Field surveyed (Int. Cl. ⁶ , DB name) G01C 15/00-15/14

Claims (2)

(57) [Scope of request for utility model registration] 1. A light receiving means composed of a light sensor for sensing a laser beam, it from the liquid crystal display panel for displaying the light receiving position
Display means that, and a laser beam receiving position of said light receiving means
Detects and performs data processing to calculate the central part of the laser beam.
The center position of the laser beam is replaced by two-dimensional coordinates.
An arithmetic processing unit for outputting to the display means , wherein the light receiving means and the display means match the coordinate origin on the same vertical line.
And a laser beam center point display, wherein the center point of the laser beam received by the light receiving means is displayed coaxially with the light receiving means on the display means. apparatus. 2. The laser beam center point display device according to claim 1 , wherein the arithmetic processing section is provided integrally with the housing together with the light receiving means and the display means.