JPH0452648Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a light wave alidade equipped with a light wave distance meter and an angle sensor.

(Prior art) Conventionally, alidade used for flat surveying is used by preparing several types of scales with different scale ratios and attaching one scale to one side of the alidade base depending on the drawing. During actual surveying, there is the hassle of exchanging scales. In order to eliminate such inconvenience and improve measurement accuracy, a light wave alidade is used which is equipped with a light wave distance meter for distance measurement and a rotary encoder as an angle sensor.

In the light wave alidade, the scale necessary for plotting is attached to one side of the alidade base, and the measurement reference point of the light wave distance meter is limited to one location.

(Problem to be solved by the invention) A scale is attached to the right side of the alidade base, and the conventional alidade B, whose measurement reference point is on the scale corresponding to the center of rotation of the light wave distance meter, is placed on the flat plate a. When surveying and plotting, only the shaded area of the flat plate a can be used, as shown in FIG. 5, and the effective usable area on the flat plate is small. Therefore, there is an inconvenience that the flat plate needs to be large. In addition, when the scale is attached to the right or left side of the alidade base, the worker cannot use his or her left or right dominant arm, resulting in a problem of poor work efficiency.

An object of the present invention is to provide a light wave alidade that eliminates such conventional disadvantages.

(Means for solving the problem) In order to achieve the above-mentioned purpose, the present invention is an alidade equipped with a lightwave distance meter and an angle meter, and four measurement reference points of the lightwave distance meter are set on the alidade base. Then, the measured value of the optical distance meter is set at one of the measurement reference points.
The present invention is characterized in that it is provided with arithmetic means for converting it into a measured value at one point, and that scales are attached to both sides of the alidade base.

(Function) As shown in Figure 4, the alidade base 1 is placed on the flat plate A.
When placed at the positions of X ₁ and X ₂ , use the point P ₁ l of the alidade base 1 as _the measurement reference point, and
When placed at position X ₄ , if point P _1r is used as the measurement reference point, the entire area of flat plate A can be used. point
Using P ₁ l or P _{1 r} as the measurement reference point, measure the distance to the target point using the optical distance meter 2 as shown in Figure 1.
When you want to find H _p , the actual measurement value of the light wave distance meter 2 is D, the altitude angle measured by the angle meter 3 is θ, and the light wave distance meter 2 is
If F is the distance from just below the center of rotation 4 to the measurement reference point P _1l or P _1r , then H _p = H + F = D _cps θ + F
It can be obtained by performing the calculation.
By multiplying this H _p by the desired scale ratio, the scaled distance on the flat plate can be obtained. In addition, since the scales are attached to both sides of the alidade base, it does not matter which hand the worker uses, and there is no reduction in work efficiency.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

2 and 3 show one embodiment of the present invention.
In the same figure, scales 4 ₁ and 4 ₂ are provided on both sides of the alidade base 1 on which the optical range meter 2 is mounted in the optical axis direction of the optical range meter 2, and the scales 4 ₁ and 4 There are measurement reference points at each end of ₂ .
P ₁ l, P ₂ l and P _1r , P _2r are set respectively. A rotary encoder is used as the angle meter 3 attached to the horizontal rotation shaft 5 of the light wave distance meter 2.

Although not shown, the alidade base 1 is provided with a computer and a changeover switch that changes according to the measurement reference point, and the computer stores the above-mentioned formula and the F value according to the measurement reference point. When the measurement signals of the light wave distance meter 2 and angle meter 3 and the switching signal of the changeover switch are input,
The measurement value at the measurement reference point selected by the changeover switch is calculated.

Incidentally, the computer and the changeover switch may be separated from the alidade base. In FIG. 1, reference numeral 6 indicates a prism for distance measurement using a distance meter placed at the target point, and B indicates a tripod that supports the flat plate A.

(Effects of the invention) As explained above, according to the invention, the effective usable area of the flat plate is increased, and it is easy to use regardless of the worker's handedness.

[Brief explanation of drawings]

Fig. 1 is a diagram for explaining the usage state of the present invention, Figs. 2 and 3 are a plan view and a side view of an embodiment of the present invention, Fig. 4 is an explanatory diagram of its operation, and Fig. 5 is an explanatory diagram of the operation of the conventional one. 1...Alidade base, 2...Light wave distance meter, 3
... Angle meter, 4 ₁ , 4 ₂ ... Scale, 5 ... Horizontal rotation axis.

Claims (1)

[Scope of utility model registration request] In an alidade equipped with a lightwave rangefinder and an angle meter, a calculation for setting four measurement reference points of the lightwave rangefinder on the alidade base and converting the measured value of the lightwave rangefinder into a measurement value at one of the measurement reference points. A light wave alidade characterized in that a means is provided and scales are attached to both sides of the alidade base.