JPH04178514A - Automatic displacement measuring method at multipoint - Google Patents

Abstract

PURPOSE:To perform continuous measurement without the generation of a collimation error owing to the individual difference of a user and to make the measurement suitable for measurement of a landslide by effecting initial setting of each measuring point by means of an image on a monitor, in the following, tracking each measuring point by a tracking device, and repeating measurement at intervals of a specified time. CONSTITUTION:An object of measurement is assumed as a case of slow movement being continued for a long time like, for example, measurement of a natural ground under slide. In the object, a target 5 being a reflection mirror is placed at each point to be assumed, initial setting is first effected, and information at each point is inputted to a data processing device. In which case, the operation is effected on the image of a monitor, whereby the angle of angle measuring distance measuring part 1 is regulated by a joy stick, and the position coordinate of each target 5 is orderly inputted. In the following, each measuring point is orderly tracked by a tracking device 2, and a work is repeated at intervals of a specified time. In a distance measuring work, a reflection time of a light wave is utilized, and correction of a light wave speed is automatically effected by a meteorology correcting part 4.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a method for continuously measuring displacement at a large number of measurement points.

<Conventional technology> Devices that automatically measure displacement have already been developed and are in use in the field.

This device uses a light wave range finder and an angle measurement encoder table to measure the three-dimensional displacement of a reflecting mirror installed at a HirI fixed point at regular intervals.

<Problems to be Solved by the Present Invention> Such automatic displacement measuring devices have the following problems.

<B> Although it is possible to search for very slow movements (several millimeters/day) such as ground movement, it is not possible to follow movements that are faster than that.

It takes about 5 minutes to set the center aiming mode.

<Mouth> The displacement coordinates are expressed in mechanical coordinates with one resolution as a unit.

For this purpose, it is necessary to express these coordinates in absolute three-dimensional coordinates for use in surveying.

<C> Measurement capability is 200 meters or less, making it unsuitable for measurement over a wide area.

(2) Since measuring the displacement of a fixed point is a time-consuming method, it is even impossible to measure the displacement of a large number of widely scattered points in succession.

<Objective of the present invention> The present invention was made in order to improve such conventional problems. The purpose of the present invention is to provide an automatic displacement measurement method for multiple points that can be used to measure displacements.

<Means for Solving the Problems> In other words, the present invention provides an angle and distance measurement section that includes a light wave rangefinder and an angle meter, and a joystick that can control the rotation angle and elevation angle of this angle and distance measurement section. C
A CD camera and a monitor that displays images from the CCD camera,
It consists of a weather corrector that corrects each information and a processing device that stores information on multiple measurement points.The initial settings for each measurement point are performed using images on a monitor, and then each measurement point is adjusted using a tracking device. This is an automatic displacement surveying method for multiple points that sequentially tracks and repeats the survey at regular intervals.

<Description of the present invention> The present invention will be described in detail below.

<A> Angle and distance measuring section The angle and distance measuring section 1 of the present invention is constituted by a light wave range finder and an angle meter.

The angle and distance measuring unit 1 is a device that measures the rotation angle in the horizontal direction about the vertical axis and the elevation angle from the level line using reflected light from a reflecting mirror provided on the target 5.

A joystick is provided connected to the rotating section of the angle and distance measuring section 1.

This is a contact circuit that can send connection signals in a stepless manner, and by operating this joystick, the angle and distance measuring unit 1 can be continuously rotated and raised in any direction.
The target 5 can be easily tracked.

<Mouth> Tracking device Furthermore, an automatic and dynamic tracking device 2 is attached to the angle and distance measuring section 1.

This tracking device 2 instructs the motor to a predetermined rotation speed according to information from a sensor that receives reflected light from the target 5, and as a result, the rotation angle and elevation angle of the angle and distance measurement section 1 are determined. It is configured to do this.

<C> Information processing device The information processing device is a device that performs statistical calculation processing on the information of the measurement points measured by the angle and distance measuring section 1, and is particularly capable of storing a large amount of initial value data of many points. .

As a result, it is possible to sequentially and repeatedly measure multiple points at regular intervals and calculate the amount of displacement at that position.

<2> Image device A CCD camera 3 is further attached to the angle and distance measuring section 1, and a monitor for displaying an image of the CCD camera 3 is connected via an optical fiber cable.

Therefore, the monitor can be installed in an office, etc., away from the angle and distance measuring section 1.

<E> Weather corrector Since precise information regarding the target 5 is required, a weather corrector 4 for correcting distance and angle information is installed in the main body of the angle and distance measuring section 1.

<Automatic Displacement Surveying Method> Next, a method for performing automatic displacement surveying of multiple points using the above-mentioned device will be described.

<B> Placement of the target 5 The object of the survey is assumed to be one that continues to move at a slow speed for a long time, such as when measuring a sliding ground.

A reflecting mirror is installed as a target 5 at each point to be measured on such an object.

<mouth> Initial settings - To automatically measure the displacement of multiple points, first perform initial settings and input information for each point into the data processing device.

It is convenient to perform this operation on the image on the monitor.

To do this, the angle of the angle and distance measuring section 1 is operated using a joystick, each target 5 is sequentially referenced, and the coordinates of the position are sequentially input into the data processing device (.

<C> Survey work Once the information for each measurement point is input, the tracking device 2 then tracks each measurement point in sequence and repeats this survey work at regular intervals.

Distance measurement uses the reflection time of light waves.

The speed of the light wave can be corrected by the weather corrector 4 automatically inputting a signal to the surveying section by analyzing the temperature and atmospheric pressure.

<2> Tracking work The tracking work involves spreading the infrared light from the tracking device 2 (1
Target 5 in 25cm+ at 00g+)
This is done by moving the position of the reflector.

When the angle and distance measuring unit 1 is directed toward the reflector based on the previous data, the elevation angle and horizontal angle of the device are corrected by the reflected waves from the moving target 5, and tracking is performed sequentially.

In the tracking operation using this light wave range finder, survey data can be continuously obtained while tracking the target 5 at intervals of only about 0.4 seconds at each point.

Furthermore, its tracking ability is 30 m/h at a position of 100 meters.
Since it is possible to track distances of km 2 , continuous surveying of multiple points is possible even in situations that change at a certain high speed.

If a change greater than this set value occurs, that is, a situation in which tracking is not possible, a configuration may be adopted in which it is determined that this is an abnormal situation and an alarm is issued.

Effects of the Present Invention As described above, the device of the present invention is capable of high-speed automatic tracking, so it accumulates a large amount of observation data for each point and sequentially tracks multiple points to accumulate data for each point. be able to.

Therefore, standard errors due to individual differences do not occur, and continuous measurements are possible without fatigue during observation.

Therefore, it can be used to measure landslides over a wide range and to measure the displacement of large civil engineering structures.

Also, all work can be controlled from a distance.
Unmanned measurement is possible, and it can be expected to improve the environment for the workers controlling it.

[Brief explanation of drawings]

Figure 1.2 Explanatory diagram of the surveying state of the present invention

Claims (1)

[Claims] (1) An angle and distance measuring unit equipped with a lightwave rangefinder and an angle meter, a joystick that can control the rotation angle and elevation angle of this angle and rangefinder, and a device that performs measurements according to information from the lightwave rangefinder. A tracking device that determines the rotation angle and elevation angle of the angular range finder, a CCD camera integrated with the light wave range finder, a monitor that displays images from this CCD camera, and a weather corrector that corrects each information. It consists of a processing device that stores information on multiple measurement points, and initial settings for each measurement point are performed using images on a monitor.After that, each measurement point is sequentially tracked by a tracking device, and a large amount of data is measured at regular intervals using a tracking method. A multi-point automatic displacement survey method that repeats the survey by importing data from