JPS5833524Y2 - Laser type position/inclination measuring device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a device for measuring the position and inclination of an object using a laser beam.

In conventional measuring devices of this type, the corner cube a
The front half-mirror part is used as a generally well-known galvano-type angle detector, and the reflected light from the bottom of the corner cube is used for position detection.

According to this device, the essential property of the galvano angle detector is that as the distance between the corner cube a and the laser tube C increases, the measurable angle range becomes extremely small.

In other words, this device is suitable for measuring angles at very short distances (5 meters or less) and minute angle changes (in seconds), and it is suitable for measuring fairly large angle changes (in degrees) over long distances (5 meters or more). It is impossible to measure.

Furthermore, when the object to be measured moves, it is necessary to calibrate the measured values.

The present invention was developed in view of the above circumstances, and its purpose is to have the same resolution regardless of the distance between the laser tube and the corner cube, and to measure changes in the position and inclination angle of the object to be measured. An object of the present invention is to provide a laser complete position/inclination measuring device that can accurately and easily measure.

The present invention will be explained below with reference to FIG.

Inside the drawing is a laser oscillation and reading section, and B is an object to be measured.

The laser oscillation and reading section AK includes a laser tube 1, a half mirror 2, a detector 3 such as a phototransistor, and a calculation and display section 4 for displaying the positional displacement and angular displacement of the object B to be measured.

The object to be measured BK is provided with the corner cube 5 and the rear corner cube 6.

The corner cube 5 is composed of a pyramid 7 and a cylinder 8, and the pyramid 7 has a structure in which the recess 8aK of the cylinder 8 is in complete contact with the front surface S of the pyramid 7 and the rear surface R of the cylinder 8. are parallel to each other, and the pyramid 7 and cylinder 8 are made of the same material such as glass.

Further, the boundary between the pyramid 7 and the cylinder 8 is a half mirror 9, and therefore has transparency of light rays and straightness of the optical path.

Further, the rear corner cube 6 is a pyramid and has a mirror 10 at the bottom.

Thus, the laser beam starting from the laser tube 1 is reflected by the half mirror 9 of the front corner cube 5, and this reflected light U is input to the detector 3 by the half mirror 2.

The laser beam transmitted through the half mirror 9 of the corner cube 5 enters the rear corner cube 6 and is reflected by the half mirror 10 thereof.

This reflected light (1) enters a detector 3 via a half mirror 2.

Before the difference in the detection positions of the imaging incident beams U and V, the change in the position of the rear corner cube 5.6, that is, the inclination angle of the object to be measured B, is calculated and displayed on the display section 4.

Also, the position change is such that the reflected lights U and V from the two corner cubes 5 and 6 are reflected by the corner cubes 5 and 6 respectively.
, 6 is shown.

The ratio of the amount of light U reflected from the front corner cube 5 to the light V reflected from the rear corner cube 6 is 1:2, and the two reflected lights can be discriminated based on the difference in light amount.

The present invention has been described in detail above, and includes the laser tube 1 installed in the laser oscillation and reading section A, and the object to be measured B.
A front corner cube 5 is provided at the object B to be measured and has a front corner cube 5 which reflects a part of the laser beam from the laser tube 1 and transmits the other part of the laser beam and has a straight optical path. A rear corner cube 6 that reflects the laser beam transmitted through the corner cube 5 and has a straight optical path, and a laser oscillation and reading section AK are provided at the front.
A detector 3 that detects the reflected lights U and V from the rear corner cubes 5 and 6, and a laser oscillation and reading section AK are provided, and the signals from the detector 3 are inputted to detect the positional displacement and tilt angle displacement of the object to be measured B. Since it is equipped with a display unit 4 that calculates and displays can do.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of the configuration of a conventional laser complete position and inclination measuring device, and FIG. 2 is an explanatory diagram of the configuration of an embodiment of the present invention. 1 is a laser tube, 3 is a detector, 4 is a calculation and display section, 5
is the front corner cube and 6 is the rear corner cube.

Claims (1)

[Scope of utility model registration request] Laser tube 1 equipped with laser oscillation and reading section AK
, a front corner cube 5 which is provided with an object to be measured BK and which reflects a part of the laser beam from the laser tube 1 and transmits the other part of the laser beam and has a straight optical path; A rear corner cube 6 is provided which reflects the laser beam transmitted through the front corner cube 5 and has a straight optical path, and a laser oscillation and reading section AK is provided to reflect the laser beam from the front and rear corner cubes 5 and 6. A detector 3 that detects the lights U and V, and a display section 4 that is provided in the laser oscillation and reading section A and that inputs the signal from the detector 3 and calculates and displays the positional displacement and tilt angle displacement of the object to be measured B. A laser complete position and inclination measuring device characterized by comprising: