JPH07311040A - Measuring method for three-dimensional coordinate - Google Patents

Abstract

PURPOSE:To enable the three-dimensional coordinate values of a measuring point to be measured quickly and easily. CONSTITUTION:Targets 6a, 6b are mounted on the sides of a collimation rod 4 and the end 4a of the collimation rod 4 is made to abut a measuring point 2 with the reflecting surface of one of the targets, 6a, opposed to a three- dimensional measuring device 7. An operator 3 gripping the collimation rod 4 transmits a command to start measurements at a wireless terminal 9 to the three-dimensional measuring device 7, which in turn automatically searches for the target 6a and measures the three-dimensional coordinate values Pa of the target 6a. Thereafter, the collimation rod 4 is rotated to direct the other target 6b to the three-dimensional measuring device 7 to measure the three- dimensional coordinate values Pb of the target 6b. The three-dimensional coordinate values P2 of the measuring point 2 are calculated from the distance L from the target 6a to the end 4a of the collimation rod 4 that is measured beforehand and from the three-dimensional coordinate values Pa, Pb of the two targets 6a, 6b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a three-dimensional coordinate measuring method, and more particularly to a three-dimensional coordinate measuring method for quickly and easily measuring the three-dimensional coordinate value of a measuring point.

[0002]

2. Description of the Related Art Conventionally, a measuring method using a three-dimensional measuring device is known for measuring three-dimensional coordinate values of a point to be measured in a survey site or the like. The measuring method, while moving and holding the target for light wave reflection to the measurement point,
The three-dimensional measuring device is installed at a point where the target can be collimated and the three-dimensional coordinates are known. Then, by collimating the target with the telescope of the three-dimensional measuring apparatus, the distance and angle from the three-dimensional measuring apparatus to the target are measured and the three-dimensional coordinate value of the measurement point is obtained.

[0003]

In the conventional three-dimensional coordinate measuring method, an operator operating the three-dimensional measuring device and a target are moved to a measuring point so that the target can be collimated by the three-dimensional measuring device. Arrange with workers to hold. For this reason, at least two workers are always required for the measurement work, and workability is poor.

Further, since there are obstacles and the like between the three-dimensional measuring device and the measuring point, it may not be possible to collimate the measuring point directly from the three-dimensional measuring device. In this case, a provisional point that can collimate the measurement point is provided once, and the measurement point is measured from the provisional point. The measuring method requires a great amount of time for measurement because the number of times of measurement increases, and also increases the danger at the work site. Furthermore, it may be difficult to move the target to the measurement point at the work site or the like.

Therefore, the three-dimensional coordinate value of the measurement point can be quickly calculated,
In addition, there arises a technical problem to be solved in order to enable easy measurement, and an object of the present invention is to solve the problem.

[0006]

DISCLOSURE OF THE INVENTION The present invention has been proposed in order to achieve the above-mentioned object, and a plurality of targets having different directions are provided on the side portion of the collimation rod, and a third order with an automatic tracking mechanism is provided. The original coordinate measuring means is installed at a known three-dimensional coordinate position,
The tip of the collimation rod is brought into contact with the measurement point, one of the targets is held in a direction in which the three-dimensional coordinate measuring means can be tracked, and a measurement start command is given to the three-dimensional coordinate measuring means by wireless communication means. After outputting and measuring the three-dimensional coordinate value of the one target, the collimator rod is rotated while the tip of the collimation rod is in contact with the measurement point to measure the other target by the three-dimensional coordinate measurement. The three-dimensional coordinate measuring means to measure the three-dimensional coordinate value of the other target and to measure the distance from the target measured in advance to the tip of the collimation rod and the measured plurality of targets. The present invention provides a three-dimensional coordinate measuring method for calculating the three-dimensional coordinate value of the measurement point from the three-dimensional coordinate value of.

[0007]

The collimation rod used in the three-dimensional coordinate measurement of the present invention is provided with a plurality of targets on its side portion, and the collimation rod is held with its tip end abutting the measurement point. Then, the three-dimensional coordinate measuring means, for example, a three-dimensional measuring device with an automatic tracking mechanism is arranged at a position where the collimation rod can be tracked, and a worker arranged to operate the collimation rod issues a measurement start command from a wireless terminal. Is transmitted, the three-dimensional measuring device automatically tracks the target and measures the three-dimensional coordinate value of the target. Further, when the collimation rod is rotated to face the other target to the three-dimensional measuring device, the three-dimensional measuring device automatically loses sight of the target by the rotation of the collimating rod and then automatically operates the other target. By tracking, the three-dimensional coordinate value of the target is measured. Thus, the three-dimensional coordinate value of the measurement point is calculated based on the distance from the tip of the collimation rod that has been measured in advance to any one of the targets and the three-dimensional coordinate values of the plurality of targets. It

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to FIGS. In FIGS. 1 and 2, reference numeral 1 is a face ceiling such as a tunnel. A measurement point 2 at which a three-dimensional coordinate value is to be measured is set on the cross-section of the face ceiling 1. If the ceiling cross-section of the measurement point 2 is unstable, it is dangerous for an operator to enter directly under the measurement point 2, and therefore a target cannot be installed at the measurement point 2.
In addition, there is a case where the face ceiling near the measurement point 2 has irregularities, so that a measurement light wave or the like from a three-dimensional measuring device described later is blocked. Therefore, below the measurement point 2 set on the face ceiling 1, the worker 3 is arranged at a point where safety is confirmed and the point is closest to the measurement point 2. The operator 3 holds the lower part of the collimation rod 4 and
a is brought into contact with the measurement point 2.

As shown in FIG. 3, the collimation rod 4 is, for example, a cylindrical rod, and a positioning pin 5 is provided at the tip portion 4a. The positioning pin 5 is formed so that the tip of the positioning pin 5 can indicate a measurement point and the collimation rod 4 can be rotated in a state of indicating the measurement point. Then, the targets 6a and 6b are fixed to the side portions of the collimation rod 4, and the tip portion 4 of the collimation rod 4 is fixed.
The distance L from a to the target 6a is accurately measured in advance. The targets 6a and 6b are prisms formed by mirrors and the like, and are targets for tracking by a three-dimensional measuring device described later. It should be noted that in the present embodiment, the one provided with two targets has been described, but the number thereof should not be limited to this. The targets 6a and 6b have their respective posture directions that cannot be collimated by the three-dimensional measuring device at the same time, for example, at right angles to the longitudinal direction of the collimation rod 4, and
The collimation directions are arranged so as to be opposite to each other.

As shown in FIG. 1, the worker 3 abuts the collimation rod 4 on the measuring point 2 and then the targets 6a and 6b arranged on the sides of the collimation rod 4 are in contact with each other. Adjust the orientation. First, of the targets 6a and 6b arranged on the side of the collimation rod 4, the target 6a that is close to the tip 4a of the collimation rod is selected, and the collimation rod 4 is rotated. The target 6a is fixed and held in a direction in which the reflecting surface of the target 6a can be tracked by a three-dimensional measuring device described later.

In the tunnel, the work equipment
Three-dimensional coordinate measuring means at points that do not interfere with operation, eg
For example, a three-dimensional measuring device 7 with an automatic tracking mechanism is installed.
It The three-dimensional measuring device 7 is supported by a tripod 8,
Target of the collimation rod 4 abutting on the measurement point 2
Point P, which can collimate 6a and has a known three-dimensional coordinate value
₇(X₁, Y₁, Z₁). Furthermore, the three-dimensional measurement
The constant device 7 is a prism such as the targets 6a and 6b described above.
Since it has a mechanism to automatically search and track
The contractor 3 manually operates the three-dimensional measuring device 7 to
It is not necessary to collimate the Get with a telescope or the like.

Therefore, the worker 3 is a wireless communication means.
Carry the wireless terminal 9 with a carrying belt, for example.
The wireless terminal 9 was held by holding the collimation rod 4.
Operate at the point. The wireless terminal 9 uses the three-dimensional measurement
The measuring device 7 can be remotely operated by wireless communication and
It is possible to send and receive specified data. The measurement point
When measuring the three-dimensional coordinate value of 2, first,
As a result, the coordinate measuring device 7 can collimate the target 6a.
Operate the wireless terminal 9 while fixing it in the direction
Send the measurement start command. The three-dimensional measuring device 7 is
Search for the target 6a, and find the three-dimensional seat of the target 6a.
Standard P_a(X_a, Y_a, Z _a) Is measured and the three-dimensional coordinates
Value P_aIs transmitted to the wireless terminal 9.

Next, the worker 3 confirms the three-dimensional coordinate value P _a at the wireless terminal 9 and rotates the collimation rod 4 as shown in FIG. At this time, the collimation rod 4 has the tip 4
When a is brought into contact with the measurement point 2, the collimation rod 4 is rotated with its longitudinal direction fixed. The collimation rod 4 is rotated so that the direction of the target 6a is the coordinate measuring device 7
It becomes a direction that cannot be collimated. And another target 6
The collimating rod 4 is fixed in a direction in which b can be collimated by the three-dimensional measuring device 7. On the other hand, after the three-dimensional measuring device 7 loses the position of the one target 6a due to the rotation of the collimation rod 4 described above, an automatic tracking mechanism operates to collimate the other target 6b.

The three-dimensional measuring device 7 has the target 6b.
The three-dimensional coordinate value P _b (X _b , Y _b , Z _b ) of
It is transmitted to the wireless terminal 9. The wireless terminal 9
Receives the three-dimensional coordinate P _b of the target 6 _b ,
The three-dimensional coordinate value P ₂ (X ₂ , Y ₂ , Z of the measurement point 2 is calculated by using a calculation means prepared in advance in the wireless terminal 9.
₂ ) is calculated. Three-dimensional coordinate value P of the measurement point 2
₂ is the target 6 measured by the three-dimensional measuring device 7.
The three-dimensional coordinate values P _a and P _b of the two points a and 6b and the distance L from the tip 4a of the collimation rod 4 to the position of the target 6a are calculated using a trigonometric function.

FIG. 4 shows another embodiment, which is designated by reference numeral 11.
Is a collimation rod. The collimation rod 11 is composed of a cylindrical rod body, and one target 12 is fixedly mounted on a side portion of the collimation rod 11. The collimating rod 11 has a tip portion 11a formed to be extendable and contractible in the longitudinal direction. When the collimation rod 11 is used for measuring three-dimensional coordinates, first, the collimation rod 11 is extended to extend the collimation rod 11 from the tip 11a to the target 12
Measure the distance M to. Grasping the lower part of the collimation rod 11 and bringing the tip 11a into contact with the measurement point 13 of three-dimensional coordinates,
Three-dimensional coordinate value P ₁₁ (X ₁₁ , Y ₁₁ ,
Z ₁₁ ) is measured by the above-described three-dimensional measuring device (not shown). Further, the collimation rod 11 is moved to the measurement point 1 while the tip portion 11a of the collimation rod 11 is in contact with the measurement point 13.
Press in the direction of 3. The collimation rod 11 is contracted in the longitudinal direction, and the target 12 is moved to and held at a position 12a close to the measurement point 13.

On the other hand, the three-dimensional measuring apparatus tracks the target 12 and stops the target 12 at the position 12
The three-dimensional coordinate value P ₁₂ (X ₁₂ , Y ₁₂ , Z ₁₂ ) of a is measured. Thus, as described above, the three-dimensional coordinate value P of two points
₁₁ , P _12, and the distance M from the tip 11a of the collimation rod 11 to the target 12 at the point where the three-dimensional coordinate value is P _11.
Based on the three-dimensional coordinate value P of the measurement point 13
₁₃ (X ₁₃ , Y ₁₃ , Z ₁₃ ) is calculated.

The number of targets to be used for measurement or the number of points for target measurement must be at least two, but the accuracy of the three-dimensional coordinate value to be measured can be improved by increasing the number of measurements or the number of points. can do. Therefore, the present invention can be variously modified without departing from the spirit of the present invention, and it is obvious that the present invention extends to the modified one.

[0018]

As described in detail in the above-mentioned one embodiment, the present invention provides a target on a collimation rod, and when the collimation rod is in contact with a measurement point, the two points of the target are measured. Three-dimensional coordinate values were measured. Then, the three-dimensional coordinate value of the measurement point is calculated from the measured three-dimensional coordinate value of the two points and the distance from the tip of the collimation rod to any one of the three-dimensional coordinate values. It is possible to obtain the three-dimensional coordinate value of a point.

Further, since the length of the collimation rod is not limited, the measurement point where the target cannot be arranged, for example, the location above the ceiling or the dangerous area cannot enter, or the measurement point is directly determined by an obstacle or the like. It can be used even when collimation is not possible. Further, the three-dimensional measuring device has an automatic mechanism for searching and tracking the target, and the command of measurement of the three-dimensional measuring device and the transmission / reception of the measured data can be remotely controlled by radio. Therefore, since the operator who operates the collimation rod can also operate the three-dimensional measuring apparatus, the working efficiency can be improved, and the invention can have various kinds of effects.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an embodiment of the present invention and showing a measurement state in a first stage.

FIG. 2 is an explanatory diagram showing a second-stage measurement state.

FIG. 3 is a front view of a collimation rod.

FIG. 4 is a front view of the collimation rod of another embodiment.

[Explanation of symbols]

2 measurement points 4, 11 collimation rods 4a, 11a tip parts 6a, 6b, 12 target 7 three-dimensional measuring device 9 wireless terminal L, M distance P ₂ , P ₇ , P ₁₁ , P ₁₂ three-dimensional coordinate value P ₁₃ , P _a , P _b three-dimensional coordinate values

Claims (1)

[Claims] 1. A plurality of targets are provided on different sides of the collimation rod in different directions, and three-dimensional coordinate measuring means with an automatic tracking mechanism is installed at a known three-dimensional coordinate position. The part is brought into contact with the measurement point, one target is held in a direction in which the three-dimensional coordinate measuring means can be tracked, and a measurement start command is output to the three-dimensional coordinate measuring means by wireless communication means to output the one of the one target. After measuring the three-dimensional coordinate value of the target, while keeping the tip of the collimation rod in contact with the measurement point, rotate the collimation rod to face the other target to the three-dimensional coordinate measuring means, While measuring the three-dimensional coordinate value of the other target by the three-dimensional coordinate measuring means, the distance from the target measured in advance to the tip of the collimation rod, and the measured three-dimensional coordinate value of the plurality of targets. From the 3D of the measurement point A three-dimensional coordinate measuring method characterized in that coordinate values are calculated.