JP2587237B2 - Measurement method of machine center height of coaxial collimation rangefinder - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for measuring the height of a mechanical center of a distance measuring instrument that electrically measures distance measurement.

2. Description of the Related Art Conventionally, a coaxial type ranging finder in which an optical axis for ranging and an optical axis of a telescope for collimating a target are used is, as shown in FIG. A rangefinder body a having a built-in mechanism is supported on a gantry b by a pair of columns c, and its pivot axis d (the pivot axis is the optical axis of the collimating optical system and the light of the ranging optical system). The gantry b is fixed to a housing f containing a centripetal telescope e, and is mounted on a mounting surface of a tripod g. Vertical optical axis i of the centripetal telescope e collimating the measuring point h
And a position adjustment mechanism (not shown) for positioning the pivot axis d, that is, the mechanical center (optical center), which is located on an extension of the reference point h, directly above the reference point h.

Since the pivot axis d, which is the center of the machine, is a measurement reference point in the vertical direction, it is necessary to determine the height H of the pivot axis d to determine this.

Therefore, conventionally, a person has measured the height H of the mechanical center, that is, the pivot shaft d, using a tape measure.

(Problems to be Solved by the Invention) The above-described conventional measurement of the height of the center of the machine causes an error, and particularly when the installation point of the distance measuring instrument is not a flat place but an inclined surface, the measurement is particularly performed. The operation is difficult and there is a disadvantage that the error is further increased.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method of measuring the height of the mechanical center of a coaxial collimating rangefinder that can solve the above-mentioned disadvantages with a simple configuration.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention comprises an optical system for positioning a target, an optical system for distance measurement, an optical centripetal device for positioning a circuit and a main body. In the method of measuring the height of the mechanical center of a distance measuring instrument, a reflector is arranged at a measuring point immediately below the center of the distance measuring instrument main body, and the light exit port of the distance measuring instrument main body and the eyepiece section of the optical system centripetal device are illuminated. The distance from the light exit / entrance portion to the positioning reference point is measured by the distance measuring mechanism and the circuit by optically connecting the transmission member, and the machine center height is calculated from the measured value. Features.

(Effect) The light emitted from the light emitting and entering portion of the rangefinder body is guided to the optical centripetal device via the light transmitting member, reflected by the reflector disposed at the measurement point, and follows the same optical path as the outward path again. The light enters the light exit port, and is positioned through a light exit port, a light transmitting member, and an optical centripetal device from a predetermined point at the same height as the machine center based on the phase difference between the light emitted from the light exit port and the incident light. Obtain the distance to the reference point, calculate the height of the centripetal telescope from the distance, add the length between the machine center height and the height of the optical centering device to the height, and calculate the machine center height Is calculated.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1 to FIG. 3, a ranging finder main body 1 includes a target object collimating and ranging optical system mechanism 2 disposed at a vertically central portion thereof and a ranging circuit section 3A vertically assembled. , 3B and a case 1A for accommodating them, are supported by a pair of columns 5, 5 erected on a gantry 4 via a pivot shaft (center of machine) 6, and swing around the pivot shaft 6. You can move.

The gantry 4 is attached to a housing 8 containing an optical centripetal device 7 so as to be rotatable in a horizontal direction by a shaft (not shown). The housing 8 has a well-known position adjusting mechanism (not shown). The legs can slide on a horizontal pedestal 11 (having a light transmitting hole 11A of the centripetal telescope 7) of a telescopic tripod 10 through which the horizontal position can be adjusted.

A leveling mechanism 12 is interposed between the housing 8 and the horizontal pedestal 11 so that the main body 1 is in a horizontal state,
Can be adjusted to a vertical state.

The above configuration will be described in more detail. The collimating and ranging optical system mechanism 2 is disposed on the objective lens frame 13A and the eyepiece lens frame 13B formed on the mutually facing opening edges of the case 1A. Objective lens 14 and eyepiece 15,
It comprises a dichroic prism 16 disposed between the lenses 14 and 15, and a light emitting diode 17 disposed opposite the prism 16.

As shown in FIG. 3, the measurement circuit units 3A and 3B include an oscillator 18 for emitting light from the light emitting diode 17 and a light transmission drive circuit.
19, a light receiving diode 20 for receiving the reflected light, a light receiving amplifier 21, a phase detection circuit 22, and a circuit comprising a phase difference detection counter 23, the oscillator 18 is a light transmission drive circuit
The light-emitting diode 17 emits light via 19, and the light-receiving diode 20 receives the lightwave emitted from the objective lens 14, reflected by the reflecting mirror provided at the target point, and incident on the objective lens 14 again. The light wave is amplified by the light receiving amplifier 21 and the amplified signal and the reference signal from the oscillator 18 are converted into a phase detection circuit.
A comparison is made at 22, and a phase difference detection counter 23 measures the distance to the target point according to the phase difference between the two signals. The distance is displayed on a display 24 (not shown in FIGS. 1 and 2) provided on the case 1A of the main body 1.

The optical centripetal device 7 has a right-angle prism 7A for collimating the measurement point 25, and an optical path 25 refracted by the prism 7A.
Are set so that the pivot shaft 6 and the rotation center axis of the main body 1 are located on the extension of.

Accordingly, when the measuring point 25 is collimated by the optical centripetal device 7 using the leveling mechanism 12 and the position adjusting mechanism, the pivot shaft 6, which is the mechanical center of the rangefinder body 1, is set to the measuring point 25. can do.

The above configuration has no difference from the conventional rangefinder.

According to the present invention, the objective lens form 13A provided on the case 1A of the main body 1 and the eyepiece form 7B of the optical centripetal device 7 are provided.
A light transmitting member 27 for connecting between them and a reflecting prism 28 placed at the measuring point 25 are prepared, and a computer 29 connected to the phase difference detection counter 23 is provided.

The light transmitting member 27 has a double structure in which the outer periphery of the optical fiber 27A is covered with a flexible pipe 27B as a protection member, and one end thereof has an objective lens form of the main body 1.
An easily attachable / detachable objective lens hood 27C is fixed to 13A, and an easily attachable / detachable eyepiece lens hood 27D is attached to the other end of the eyepiece mold form 7C of the optical centripetal device 7 at the other end.
Inside the objective lens hood 27C and the eyepiece hood 27D, condenser lenses 27E and 27F are provided with frame bodies 27G and 27H, respectively.
The light emitted from the objective lens 14 is condensed by the condenser lens 27E and sent to the optical fiber 27A.
The light emitted from the optical fiber 27A is converted into parallel light by a condenser lens 27F and is transmitted to an eyepiece 7B of the optical centripetal device 7.

Thus, when measuring the machine center height, the light transmitting member 27 is connected between the objective lens form 13A of the main body 1 and the eyepiece form 7C of the optical centripetal device 7, and the measurement point 25 is set. The reflection prism 28 is installed, and the distance to the measurement point 25 is measured by the distance measuring mechanism and circuit. This distance is, the position P ₂ of the converging lens 27E from the position P ₁ of the dichroic prism 16,
Converging position P ₃ of the light lens 27E, it reaches the position P ₅ of the positioning reference point 25 through the position P ₄ of the right-angle prism 7A distance l [P ₁ -P ₂₎
+ (P ₂ −P ₃ ) + (P ₃ −P ₄ ) + (P ₄ −P ₅ )], and is measured from the output of the phase difference detection counter 23.

The computer 29 has a dichroic prism 16 in advance.
Distance from the position P ₁ up to the position P ₄ of the right-angle prism 7A
l ₂ [= (P ₁ −P ₂ ) + (P ₂ −P ₃ ) + (P ₃ −P ₄ )] and the distance l ₃ from the position P ₄ of the right-angle prism 7A to the position of the pivot point 6 are stored. Computer 29, the counter
From the distance l obtained in 23 performs addition of subtraction and distance l ₃ of the distance l ₂ calculates the mechanical center height H. Thus, the machine center height H is displayed on the display 24.

In the above-described embodiment, the range finder has been described. However, a range finder equipped with a theodolite having an angle measuring function in addition to the range finder (a range finder mounted on the theodolite) may also be used.
Similarly, the mechanical center of the theodolite can be obtained by connecting the optical centering device provided in the theodolite and the light emitting / receiving section with the light transmitting member, and the mechanical center of the rangefinder can be obtained by adding a predetermined height. .

Further, to store the distance l ₂ and l ₃ in advance in the computer 29 in the above embodiment, automatically, but calculates the mechanical center height, after measuring the distance l, the distance l ₂ and the keyboard of computer 29 Enter l ₃ and from distance l these distances l ₂ ,
l ₃ may be adjusted.

(Effects of the Invention) As described above, according to the present invention, there is an effect that the height of the machine center can be measured accurately and easily with a simple configuration.

[Brief description of the drawings]

FIG. 1 is a partially cutaway side view of a distance finder used for carrying out the method of the present invention, FIG. 2 is an explanatory diagram thereof, FIG. 3 is a block diagram of an electric circuit thereof, and FIG. It is a partially broken side view of the distance measuring instrument used for implementing the measuring method. DESCRIPTION OF SYMBOLS 1 ... Range main body 2 ... Optical system mechanism for collimation and ranging 3A, 3B ... Ranging circuit 6 ... Pivot shaft 7 ... Range 7B ... Eyepiece of telescope 7 Formwork 13A …… Objective lens formwork 27 …… Light transmitting member, 28 …… Reflection prism

Claims (1)

(57) [Claims] 1. A method for measuring a mechanical center height of a distance measuring instrument having an optical centripetal device for positioning a target object collimating optical system mechanism, a distance measuring optical system mechanism and a circuit with the main body. A reflector is arranged at a measuring point just below the center, and a light emitting / receiving part of the rangefinder body and an eyepiece of an optical centripetal device are optically connected by a light transmitting member, and a positioning reference is provided from the light emitting / receiving part. Measuring the distance to a point by the distance measuring mechanism and circuit, and calculating the height of the mechanical center from the measured value. .