JPS6250616A - Surveying method using laser - Google Patents

Abstract

PURPOSE:To perform labor-saving and high-speed surveying operation by calculating the coordinates of a surveying point by an arithmetic unit based on a difference in time when laser light reaches respective photodetectors. CONSTITUTION:The time difference tbc in which swiveling laser light from a laser lamphouse 1 reaches a photodetector 5 from a photodetector 4 and the time difference tcb in which the laser light further swivels and reaches the photodetector 4 from the photodetector 5 are measured by a time difference measuring function based on signals from the photodetectors 4 and 5, and the time difference tac in which the laser light reaches a photodetector 6 from a photodetector 3 and the time difference tca in which the light reaches the photodetector 3 from the photodetector 6 are measured by the time difference measuring function on the basis of signals from the photodetectors 3 and 6 to calculate the vertical angle theta of a reference point A. Similarly, the vertical angle phi of a reference point B is calculated and the coordinates of a measurement point C are calculated by trigonometry based on reference distance land the vertical angles theta and phi.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a surveying method using a laser.

[Prior Art] As is well known, the triangulation currently being carried out requires manpower, takes a long time, and the measurement results vary depending on the level of skill, and the measurement requires moving the measurement point. It is difficult to do this continuously, and furthermore, there are problems such as not being able to directly input data into a computer or the like.

[Objective of the Invention 1 Therefore, the object of the present invention is to provide a laser that can save labor, increase speed, have no individual differences in measurement results, perform continuous measurement, and furthermore, can be input directly into a computer, etc. The objective is to provide the surveying method used.

[Structure of the Invention] The surveying method using a laser beam according to the present invention provides a reference point at each vertex of a triangle that includes a measurement point in a plane,
A laser lighthouse and a laser receiver are installed at each reference point to irradiate a rotating laser beam, and a laser receiver is installed at the measurement point. Find the measurement point of the other reference point while the laser beam is rotating, and the time difference between the laser beam arrival between the measurement point and the other reference point, and calculate the coordinates of the measurement point from these time differences and the distance between both reference points. is being calculated.

[Operations and Effects of the Invention] Therefore, the coordinates of the measurement point are determined using the arithmetic device using the difference in time when the laser beam reaches each receiver.
It is possible to save labor and speed up the process without requiring manual labor, there are no individual differences in measurement results, and it is possible to move the measurement point and perform continuous measurement, and furthermore, it is possible to use a microcomputer as the calculation device. , data input, recording, etc. can be facilitated. Therefore, this surveying method is suitable for architectural,
It is suitable for controlling the position of civil engineering side panels and, for example, robots for finishing concrete floors of buildings.

[Preferred Embodiment] When carrying out the present invention, the apex angle of one reference point is determined from the 100 percent of the circumference of the time difference between the laser beam of one reference point reaching the measurement point from the other reference point, and the apex angle of one reference point is determined in the same manner. It is preferable that the apex angle of the other reference point is determined by using the two reference points, and the coordinates of the measurement point are determined by trigonometry using the distance between the two reference points and these two apex angles.

[Example] The present invention will be described in detail below with reference to the drawings.

FIG. 1, FIG. 2, and FIG. 3 respectively show a hardware configuration diagram and a block diagram of an arithmetic unit for implementing the present invention.

In Fig. 1, a triangle CA including the measurement point C in plan view
Reference points A and B are provided at the vertex AS8 of B, respectively.

At the reference point A, a laser lighthouse 1 and a laser receiver 3 that emit a rotating laser beam are installed, and at the reference point B,
A laser lighthouse 2 and a laser receiver 4 are provided, and a laser receiver 5.6 is provided at the measurement point.

In FIG. 2, the laser lighthouse and laser receiver are installed on three legs at each point, with a laser lighthouse 1 and a laser receiver 5.
．． 4, the laser light stand 2, and the laser receiver 3.6 are each positioned within the same horizontal plane. Each of the light receivers 3, 4, 5 and 6 is connected to the arithmetic unit 10, respectively.

In addition, each laser lighthouse is designed to rotate clockwise in the illustrated example.

In FIG. 3, the arithmetic unit 10 is composed of a microcomputer, and includes a time difference measurement function 11a that inputs the signal from the light receiver 4.5, a time difference measurement function 11b that inputs the signal from the light receiver 3.6, and a time difference measurement function 11b that inputs the signal from the light receiver 3.6. Angle calculation function 12a that calculates the apex angle of each reference point from the measurement results of 11a and 11b.
, 12b, a reference distance input function 13 for inputting a distance between reference points, that is, a reference distance, and an angle calculation function 12a, 12.
b and the signal from the reference distance input function 13.
Coordinate calculation function 14 that calculates the coordinates of , and coordinate calculation function 1
Display function 15 that displays and stores the calculation results of 4.
and is provided.

Next, the present invention will be described in detail with reference to the flowchart shown in FIG. 4 and FIG. 1.

First, a reference path tjiQ is measured by means not shown and inputted from the reference distance input function 13 to the coordinate calculation function 14 (step 81). Next, the time difference tbc between when the rotating laser beam of the laser lighthouse 1 reaches the light receiver 4 and when it reaches the light receiver 5; The time difference tab from when the laser light from the laser lighthouse reaches the light receiver 3 is measured by the time difference measurement mode 11a based on the signal from the light receiver 4.5 and inputted to the angle calculation section 12a. The time difference measurement function 11 calculates the time difference tac until reaching the light receiver 6 and the time difference tCa between reaching the light receiver 6 and reaching the light receiver 3 based on the signal from the light receiver 3.6.
b and input it to the angle calculation section 12b (step 8
2). Next, the angle calculation function 12a calculates the apex angle θ of the reference point A based on the measurement result of the time difference measurement function 11a using the following formula 6.
The angle calculation function 12b calculates the apex angle ψ of the reference point B based on the measurement result of the time difference measurement function 11b using the following formula (Step 83). Next, the coordinate calculation function 14 calculates the coordinates of the measurement point C by trigonometry based on the reference road 11112 and the apex angles θ and ψ (step S4), and displays the coordinates on the display function 15 (step 35).

[Summary] As explained above, according to the present invention, the coordinates of the measurement point are calculated by the arithmetic unit using the time difference between when the laser beam reaches each receiver as an opposition, so that the coordinates of the measurement point can be calculated without the need for manpower. It saves labor and speeds up, there are no individual differences in measurement results, and continuous measurement can be performed by moving the measurement point.Furthermore, a microcomputer is used as the calculation device to facilitate input and recording. be able to.

[Brief explanation of drawings]

1 and 2 are hardware configuration diagrams for implementing the present invention, FIG. 3 is a functional block diagram of an arithmetic unit, and FIG. 4 is a flowchart showing an embodiment of the present invention. △, B... Reference point C... Measurement point 0 --- Reference distance tbc, tab, tac. tca...Time difference θ, ψ...Vertex angle of reference point
1.2... Laser lighthouse 3.4.5.6... Laser receiver 10... Fengoku device Figure 1

Claims (1)

[Claims] A reference point is provided at each vertex of a triangle that includes the measurement point in plan, a laser lighthouse and a laser receiver are provided at each reference point to irradiate a rotating laser beam, a laser receiver is provided at the measurement point, and each laser Connect the light receiver to a calculation device, and use the calculation device to determine the time difference between the laser beam at one reference point and the measurement point while the laser beam from one reference point reaches the other reference point, and the time difference between the laser beam at the measurement point and the other reference point, respectively. A surveying method using a laser characterized by calculating the coordinates of a measurement point from these time differences and the distance between both reference points.