JP3344631B2 - Measurement prism device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a prism device mounted on a device rotated by a telescope, and a position facing the telescope can be easily confirmed. The present invention relates to a measuring prism device which is used when detecting a tuyere tuyere position or the like of a tunnel constructed in a curve, and which can easily confirm the position directly facing a lightwave distance measuring device by visual inspection.

[0002]

[Prior art] Shielding and propulsion work, etc.
Particularly in construction involving curves, it is most important to accurately grasp the position of the tuyere at the tip in order to improve construction accuracy. For this reason, various measurement methods have conventionally been employed.

For example, Japanese Patent Application Laid-Open No. 63-231209 discloses a measuring device capable of saving labor and improving measurement accuracy.

This measuring device comprises a laser oscillator rotatably provided around a vertical axis, a photodetector for outputting a light receiving signal when receiving a laser beam, and a rotation of the laser oscillator based on a light receiving signal from the photodetector. It is equipped with a rotation angle reader that reads the intersection angle between the excavation position measuring device and both points from the corner.

The device is installed at a plurality of nodes in a tunnel, and can irradiate and receive laser light from each device to observe the intersection angle of each node. Excavator position can be measured quickly.

However, the apparatus disclosed in the above publication requires a laser oscillator for each of the apparatuses installed at a plurality of nodes in the tunnel, which makes the entire apparatus complicated and expensive.

As a countermeasure against this, the applicant of the present application has filed Japanese Patent Application No.
In -84189, a reflector that reflects irradiation light from a lightwave distance measuring instrument installed in a shaft, an optical unit that bends laser light, and guides light at a plurality of nodes in a curved tunnel is provided. We applied for a measuring device that provided a position measuring device equipped with it and turned it around a vertical axis as a rotation axis to enable efficient work.

[0008]

The measuring method using this measuring device is for obtaining the position of the target point from the distance between the nodes and the intersection angle. For this intersection angle, it is necessary to first determine the angle of the incident light that is the origin, and therefore, it is important to accurately detect the position where the specific position of the measuring device is directly opposite to the lightwave distance measuring device. For this purpose, a right-angle prism is used in the measuring device to detect the directly opposite position, but it is also necessary to adjust the normal vertical position and adjust the direction of rotation, etc. Checking the facing position is a very difficult task.

It is an object of the present invention to provide a measuring prism device which can easily confirm the position directly facing a lightwave distance measuring device by visual observation.

[0010]

In order to solve the above-mentioned problems, a measuring prism of the present invention is characterized in that first and second right-angle prisms having reflecting surfaces orthogonal to each other are bonded to each other, The reflecting surfaces of the first and second right-angle prisms are chamfered at a ridge line where the reflecting surfaces are orthogonal to each other to form first and second light transmitting portions, respectively, and further on the back surfaces of the first and second light transmitting portions, respectively. A light emitting device for irradiating light of different colors into the first and second right-angle prisms is provided.

[0011]

In the present invention, different colors of light are emitted from the back surfaces of the first prism and the second prism, respectively. Therefore, when the observer is located in the irradiation range of the first prism, the first prism is emitted. The color of the light emitting device on the back of the prism is observed,
In addition, when it is located in the irradiation range of the second prism, the second
The color of the light-emitting device on the back surface of the prism is observed, and two colors can be seen at the same time when facing the light-emitting device. This allows the observer to know the direction in which the prism should be rotated so as to face the prism, and to easily determine the exact position of the facing by visual observation.

[0012]

1 shows a measuring prism apparatus according to an embodiment of the present invention. FIG. 1 (a) is a plan view and FIG. 1 (b) is a sectional view.

The right-angle prism device 1 of the present embodiment includes a first right-angle prism 2 and a second right-angle prism 3, and the side ends of the first right-angle prism 2 and the second right-angle prism 3 are attached to each other. I'm matching. In the figure, reference numerals 2a and 3a denote reflection surfaces orthogonal to each other, and reference numeral 4 denotes a bonding surface. Further, the ridge lines 2b, 3b where the reflecting surfaces 2a, 3a are perpendicular to each other are polished by chamfering about 1 mm over the entire line, and the first and second right-angle prisms 2 and 3 respectively have the first and second right-angle prisms 3.
Are formed.

Reference numeral 7 denotes a light emitting device provided on the back surface of the first and second light transmitting portions 5 and 6, and the inside is divided into two by a partition plate 8 a provided on the extension of the bonding surface 4. The housing 8 includes a red LED 9 and a green LED 10 provided in each section of the housing 8. A slit 8b is formed at the tip of the housing 8,
Thus, the red LED 9 irradiates light only to the right-angle prism 2 and the green LED 10 irradiates light only to the right-angle prism 3. The arrow A in FIG. 1 indicates the irradiation range of the red LED 9, and the arrow B indicates the irradiation range of the green LED 10.

As described above, the right-angle prism device 1 of the present embodiment is used.
Is provided with a bonding surface in the center and emits light of different colors from the back of each of the right-angle prisms 2 and 3 toward the front, so that red is observed when the observer is located in the range of arrow A. When the observer is located in the range of the arrow B, green is observed. When the observer faces the right-angle prism device 1, that is, when the observer is located on the extension surface of the bonding surface 4, Both red and green will be observed. By utilizing this phenomenon, it is possible to easily and reliably observe the directly-facing position of the position measuring device.

FIG. 2 is a cross-sectional view showing a position measuring device provided with the right-angle prism device 1 installed in a propulsion pipe T.

The above-described right-angle prism device 1 is mounted on the Dove prism 22. The right-angle prism device 1 is used for directly facing an observer, and the Dove prism 22 is used for refracting and transmitting a laser beam. You.

The right-angle prism device 1 is rotated about a vertical axis together with a rotary encoder 13 for reading an angle on a rotary stage 12 driven by a rotary motor 12a. The rotation axis is always held vertically by a leveling device 14 driven by a leveling motor 14a controlled by a signal output from a level (not shown). The height adjustment motor 15a is remotely controlled visually, and the height of the device is adjusted by the height adjustment device 15. These devices as a whole move on rails 18 by a carriage 17 driven by a traveling motor 16.
Control signals and measurement data are communicated to the mine by wire or wirelessly.

In this embodiment, since the right-angle prisms 2 and 3 having the vertical axis as the rotation axis are used, the reflected light is transmitted to the lightwave distance measuring device irrespective of the position in the vertical axis direction unlike the flat mirror. Light is incident, and the confronting positional relationship on the plane can be confirmed.

FIG. 3 is an explanatory view of tunnel measurement using the position measuring device 11 shown in FIG.

In FIG. 3A, reference numeral 20 denotes a lightwave distance measuring instrument having a distance measuring function installed in a shaft, and 21 denotes a corner cube installed at a measuring point (cutting edge). Measuring device 1 provided with measuring prism device 1 in a place where both corner cube 21 can be seen
1 is set.

In this state, the observer turns the right-angle prism device 1 around the vertical axis by operating the light emitting device 7 by remote control. By this turning, the observer of the lightwave distance measuring device 20 observes red or green, and when the red and green light are simultaneously seen, the angle at which the lightwave distance measuring device 20 and the right-angle prism device 1 face each other, that is, It is the starting point of the angle. In this facing state, the distance I ₁ between the right-angle prism device 1 and the light wave distance measuring device 20 is read by the light wave distance measuring device 20.

Next, after rotating the right angle prism device 1 and the Dove prism 22 of the position measuring device 11,
The zero light wave passes through the dove prism 22 and is reflected from the corner cube 21. The turning angle α ° at this time is obtained from the difference from the angle at the previous reference point. Lightwave distance measuring device 20
The included angle θ ° between the angle and the corner cube 21 can be obtained by θ ° = 2α °. Also, by reading the distance of l ₁ + l ₂ , the target position of the corner cube 21 can be obtained by calculation.

By arranging the position measuring device 11 at several places and performing similar operations, it is possible to easily measure the inside of a tunnel which draws a complicated curve.

[0025]

According to the present invention, the following effects can be obtained.

(1) Since the opposite position can be confirmed by observing different colors, the position measuring device using this can have a simple structure. (2) The turning direction of the measuring prism device can be determined from the observed color, and the operation can be performed quickly.

(3) Even with a lightwave range finder having no laser oscillation function for visible light, the directly facing position of the prism can be visually confirmed.

(4) By changing the color of the laser beam and the light emitted from the right-angle prism, it is possible to avoid confusion between the beam directly facing the right-angle prism and the laser reflected beam.

[Brief description of the drawings]

1A and 1B are a plan view and a sectional view, respectively, of a measuring prism device according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of a position measuring device provided with the prism device shown in FIG.

3A and 3B are explanatory views of tunnel measurement using the position measuring device shown in FIG. 2, wherein FIG. 3A is a front view, FIG. 3B is a plan view of FIG. It is a top view of the state where it turned from the state of FIG.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 right-angle prism device 2 first right-angle prism 2 a reflective surface 3 second right-angle prism 3 a reflective surface 4 bonding surface 5, 6 light-transmitting portion 7 light-emitting device 8 housing 8 a partition plate 9 red LED 10 green LED 11 position Measuring device 12 Rotary stage 12a Rotary motor 13 Rotary encoder 14 Leveling device 14a Leveling motor 15 Height adjusting device 15a Height adjusting motor 16 Traveling motor 17 Dolly 18 Rail 20 Light wave distance measuring device 21 Corner cube 22 Dove prism T Propulsion tube

Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G01C 15/00 G01C 15/06

Claims (1)

(57) [Claims] 1. A side end of a first and a second right-angle prism having reflection surfaces orthogonal to each other are bonded to each other, and a ridge line where the reflection surfaces of the first and second right-angle prisms are orthogonal is chamfered. A light emitting device that forms first and second light transmitting portions, respectively, and further irradiates light of different colors into the first and second right angle prisms on the back surfaces of the first and second light transmitting portions, respectively. A prism device for measurement, comprising: