JPH07122667B2 - Surveyor using laser light - Google Patents

Description

TECHNICAL FIELD The present invention relates to a surveying instrument using a laser beam.

[Conventional technology]

As shown in Japanese Unexamined Patent Publication No. 62-50616, laser light sources for irradiating laser light that swivels at two reference points are respectively installed, a laser receiver is provided at a measurement point, and this laser receiver is used as an arithmetic unit. Connected, this arithmetic unit obtains the measurement point of the other reference point and the time difference of the laser beam arrival at the measurement point and the other reference point while the laser beam of one reference point turns, and these time difference and both references There is known a device that detects the position of a measurement point by calculating the coordinates of the measurement point from the distance between the points.

That is, as shown in FIG. 8, the first and second laser lighthouses 1 and 2 are installed at the first and second reference points A and B, which are separated by a predetermined distance L from the light projecting portions 1a and 2a. The first and second laser lighthouses 1 and 2 until the laser light is received by the laser receiver 3.
The rotation angles α and β of the laser light receiver 3 are detected and the position of the measurement point C where the laser receiver 3 is installed is determined by triangulation from the rotation angles α and β and the distance L between the first and second reference points A and B. It is detected as coordinates.

[Problems to be solved by the invention]

In such a surveying device, it is necessary to determine whether the laser light received by the laser receiver 3 is the laser light from the first laser lighthouse 1 or the second laser lighthouse 2, so that the laser light receiver 3 is first Two first laser receivers facing the laser lighthouse 1 and two second laser receivers facing the second laser lighthouse 2 are used.

For this reason, the laser receiver becomes large and heavy, which is inconvenient for installation and movement of the measurement point.

Therefore, an object of the present invention is to provide a surveying device using laser light, which is capable of surveying by using one laser receiver.

[Means and Actions for Solving Problems]

Laser light from the first and second laser lighthouses provided at the first and second reference points is received by a laser receiver provided at the measurement point, and the received light is used to calculate the coordinates of the measurement point. In the surveying device using, a means for identifying which of the first and second laser lighthouses is the laser light is provided in the calculating means, and the position of the measurement point is measured by using one laser light receiver. It was made possible.

〔Example〕

As shown in FIG. 2, the first and second reference points A and B, which are separated by a predetermined distance L in a plane, and the measurement point C form a triangle A, B, and C that includes the measurement point C in a plane. , This triangle A,
The vertices A and B of B and C are the first and second reference points.

The first reference point A is provided with a first laser light source 10 for emitting a turning laser beam, a reference direction detector 11, and a reference direction signal transmitting means 12, and the second reference point B is a first laser light source.
A second laser lighthouse 13 for irradiating a laser beam that rotates in a direction opposite to that of 10, and a reference direction detector 14 and a reference direction signal transmitting means 15 are provided, and at a measurement point C, a laser receiver 16 and a reference direction are provided. Directional signal receiving means 17 and computing means 18 are provided.

The first and second laser lighthouses 10 and 13 are, as shown in FIGS. 1 and 3, a laser projecting portion 10 which rotates on tripods 10a and 13a.
Laser projectors 10c and 13c having b and 13b are installed, and a laser receiver 16 has a light receiving element 1 on the surface of a polygonal prism whose cross section on a tripod 16a is a pentagon or more as shown in FIGS.
A plurality of 6b are arranged in the vertical direction and the light receiving processing means 16c
And they are positioned in the same horizontal plane.

The reference direction detectors 11 and 14 are respectively mounted on the laser projectors 10c and 13c so as to face the laser projectors 10b and 13b, respectively. A signal is sent to each of the signal transmitting means 12 and 15, and a reference direction signal is output to the reference direction signal transmitting means 12 and 15. That is, the reference direction signal transmitting means 12 and 15 are transmitters.

The reference direction signal receiving means 17 serves as a receiver, and when receiving the transmitted reference direction signal, outputs the signal to the calculating means 18.

The calculating means 18 includes means 20 for identifying a laser lighthouse based on a light receiving signal from the laser light receiver 16 and reference direction signal light receiving means.
A means for detecting the reference direction timing by the received signal of 17.
21 and the first and second laser lighthouses 10 and 1 according to those signals
The rotation angle of 3, that is, the first and second angle calculating means 22 and 23 for calculating the first and second angles α and β, and the measurement point C by the angle and the reference distance L from the reference distance input means 24. The coordinate calculation means 25 for calculating the X and Y coordinates of the above, the display means 26 for displaying the position of the measurement point C, and the height calculation means 27 for calculating the height of the laser light are provided.

The laser lighthouse identification means 20 senses the moving direction of the laser light in the order in which the light receiving element 16b of the laser light receiver 16 receives the light in the horizontal direction, so that the first and second lighthouses 10 and 13 turn in opposite directions. To identify.

For example, when sequentially receiving light from the _first light receiving element 16b ₁ toward the second light receiving element 16b ₂ as shown in FIG. 6A, it is determined that the laser light is from the first laser lighthouse 10, As shown in FIG. 6 (b), from the _third light receiving element 16b ₃ to the second light receiving element
When sequentially receiving light toward 16b ₂ , it is determined that the laser light is from the second laser light source 13.

The first and second angle calculating means 22 and 23 calculate an angle based on the time difference between the timing signal from the reference direction timing detecting means 21 and the light reception by the laser receiver 16.

The coordinate calculation means 25 and the display means 26 are the same as conventional ones.

Also, as shown in FIG. 7, the first and second laser lighthouses 1
Screw the laser projectors 10c and 13c of 0 and 13 onto the tripods 10a and 13a.
Mounted so that it can move up and down via d and 13d, the second laser lighthouse 1
The leveling light receiving element 13e is attached to the laser projector 13c of 3, and the actuator 13f for rotating the screw rod 13d thereof is provided. The actuator 13f may be driven to move the laser projector 13c up and down until the laser light from the laser lighthouse 10 is received.

By doing so, the laser light of the first laser lighthouse 10 and the laser light of the second laser lighthouse 13 can be made to have the same height, so that it is not necessary to manually adjust the height, and the work can be facilitated. .

It should be noted that the above operation control may be performed by using a CPU or the like so that the leveling light-receiving element 13e is stopped when it receives light after the drive switch of the actuator 13f is turned on.

〔The invention's effect〕

Since it is possible to identify which of the first and second laser light sources is the laser light by the calculating means, it is sufficient to use one laser light receiver, and since the laser light receiver is small and small in weight, it can be installed or measured. It will be advantageous to move.

[Brief description of drawings]

1 to 7 show an embodiment of the present invention, FIG. 1 is an overall front view, FIG. 2 is a plan view, FIG. 3 is a perspective view of a laser lighthouse, and FIG. 4 is a perspective view of a laser receiver. FIGS. 5 and 5 are block diagrams of the calculation means, FIGS. 6 (a) and 6 (b) are diagrams for explaining the direction determining operation of the laser beam, and FIG. 7 is a front view of another embodiment in which the height can be adjusted. 8 and 9 are explanatory views of a conventional example. A and B are the first and second reference points, C is the measurement point, 10 and 13 are the first,
Second laser lighthouse, 11 and 14 are reference direction detectors, 12 and 15 are reference direction signal transmitting means, 16 is a laser receiver, 17 is reference direction signal receiving means, and 18 is calculating means.

Claims (1)

[Claims] 1. A first reference point (A) and a second reference point (A) at two other vertices of a triangle which includes a measurement point (C) as one vertex in a plane.
(B) is provided, and the first and second reference points (A), (B)
The first and second laser lighthouses (10), which rotate in opposite directions,
(13) and reference direction detectors (11), (14) and reference direction signal transmitting means (12), (15) are respectively provided, and a laser receiver (16) and reference direction signal are provided at the measurement point (C). A receiving means (17) and a calculating means (18) are provided, the calculating means (18) detects the receiving direction of the laser light to identify which laser light source the laser light is from, and then the reference direction signal is supplied. A surveying instrument using laser light, characterized in that a time difference from reception to reception of the identified laser light is obtained, and coordinates of a measurement point are calculated from the time difference and a distance between both reference points.