JPH0247512Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a light wave range finder, and particularly to a light wave range finder that can measure distance and vertical angle by remote control.

Conventionally, a transmitter that emits modulated light of a fixed wavelength toward a reflecting mirror installed at a target point, and a receiver that receives the reflected light from this reflecting mirror are equipped, and the modulated light travels back and forth between the two points. A light wave rangefinder that determines distance by comparing and measuring the phase difference between two objects is known. This type of rangefinder can only measure the distance to the target point, so if you want to measure the vertical angle of the target point, for example, you need to install a separate device such as a transit near the lightwave rangefinder installed at the measurement point. and measured the vertical angle. As a result, two surveying instruments had to be installed and adjusted individually, which was an unavoidable inconvenience. In addition, with this type of light wave rangefinder, the distance is measured by directing the light wave to a reflector placed at the target point (collimation) and then operating the control knob on the front of the rangefinder. However, when operating the control knob, the rangefinder itself moves and the sighting goes out of order, and you have to sight it again.
As a result, measurement takes time, resulting in a decrease in work efficiency.

Furthermore, although conventional range finders can accurately measure the distance to a target point, it is not possible to directly plot the direction on a flat plate like an alidar. On the other hand, with conventional Aridart, although it is possible to accurately measure the direction of a target point and draw a diagram directly on a flat plate, the distance cannot be accurately measured, and there is a large error in distance compared to distance measurement. was.

This idea was made to overcome the drawbacks of the prior art as described above, and it is possible to accurately measure the distance and direction to a target point and easily plot it on a flat plate with a single device. It is an object of the present invention to provide a light wave rangefinder that can minimize errors associated with operation.

In order to achieve the above purpose, this idea equips a conventional light wave rangefinder with a vertical angle measurement function and a remote control function, attaches it to a scale stand via a casing and supports, and connects it to the scale line of the scale stand. The present invention provides a light wave rangefinder whose optical axes coincide with each other.

An embodiment of this invention will be described below based on the accompanying drawings.

FIG. 1 is an explanatory diagram showing the structure of a light wave range finder according to this embodiment. Main body 1 of this light wave rangefinder
The case 2 includes a transmitter 3 that emits modulated light toward a reflecting mirror A, a receiver 4 that receives the reflected light from the reflecting mirror A, a vertical angle detector 5, and the receiver 4. and an electric circuit 6 including a calculator that calculates various distances and vertical angles from the output signals of the vertical angle detector 5.
, a display 7 for displaying data of various measured values, and a remote control receiver 8 for remotely controlling various operations associated with measurement, and a remote control transmitter provided outside the case 2. An operation command signal from the device 9 is received by the remote control receiver 8, and operations associated with the measurement are performed. In FIG. 1, 10 is a telescope provided inside the rangefinder body 1, and 11 is a sight provided on the top surface of the outside of the rangefinder body 1. The telescope 10 is used for long-distance sighting. The sight sights 11 are used for short-range sighting.

Here, the transmitter 3 is a 2
A high frequency wave (for example, about 14 mHz) is input, modulated into a modulated high frequency wave by a modulation circuit (not shown), and applied to a light emitting element (for example, a light emitting diode) 3-1. , infrared rays) and converted into parallel light beams by the light transmitting lens 3-2, the modulated light beams are emitted toward a reflecting mirror (eg, a prism reflecting mirror) A.

The receiver 4 includes a light receiving lens 4-1 that collects the reflected light from the reflecting mirror A, and a solenoid shutter 4- that compares the phase difference between the emitted light and the reflected light.
2. A light aperture that adjusts the amount of reflected light and a light receiving element (for example, a light receiving diode) 4-4 that converts the reflected light into an electrical signal are sequentially arranged, and further amplify the output of the light receiving element 4-4. It is equipped with an amplifier circuit (not shown). This receiver 4 receives the reflected light, compares the phase difference of the modulated light traveling back and forth between the reflector and the rangefinder body 1, and sends the output signal to the electric circuit 6.
Add to.

The vertical angle detector 5 detects the inclination of the range finder body 1, and its structure is, for example, a hanging member for suspending a weight is attached to the rotating shaft of a round variable resistor. Become. This vertical angle detector 5 is installed inside the rangefinder body 1, and when the rangefinder body 1 is tilted,
Since the weight is always positioned in the vertical direction, the rotary shaft of the variable resistor rotates by a predetermined angle according to the inclination of the range finder body 1, and the resistance value changes according to the rotation.
This change in resistance value is input as a current change to a later-described computer in the electric circuit 6, and the vertical angle is calculated by this computer according to a predetermined program.

FIG. 2 is a block diagram showing the configuration of the electric circuit 6. As shown in FIG. This electric circuit 6 uses two high-frequency waves (for example, about 14M
Hz) to transmitter 3. In this transmitter 3, after modulating the input signal into a modulated high frequency, the light emitting element 3-2 converts it into an optical signal, and emits the modulated light toward the reflecting mirror A. The reflected light reflected by the reflecting mirror A is received by the receiver 4, and the phase difference of the modulated light traveling back and forth between the two points is compared, and the output signal is sent through the waveform shaping circuit 6-2 of this electric circuit 6. Add to calculator 6-1. It has a function of issuing display commands to the display 6-4. Therefore, when the output signal of the waveform shaping circuit 6-2 is added to this calculator 6-3,
Since the reference pulse signal from the oscillator 6-1 is added to this calculator 6-3, the calculator 6-3 can compare the output signal of the waveform shaping circuit 6-2 and the reference pulse signal of the oscillator 6-1. By comparing the phase difference, calculate the distance to reflector A installed at the target point.
It is calculated in mm units, and the calculated value is digitally displayed on the display 6-4. Note that in this method,
It is possible to measure distances from 1m to over 1km. If there is a specific height difference between the target point and the measurement point, the vertical angle detection signal of the vertical angle detector 5 is added to the calculator 6-3, and the vertical angle is calculated by this calculator 6-3. A horizontal distance and a specific height difference are calculated from this vertical angle and oblique distance, and are digitally displayed on a display 6-4. The operation command to this computer 6-3 is sent to a remote control transmitter 9 that issues various command signals.
from this computer 6 via the remote control receiver 8.
- added to 3. In FIG. 2, reference numeral 6-5 denotes a power supply, which is provided outside or inside the rangefinder main body 1, and includes an oscillator 6-1, a waveform shaping circuit 6-2, a calculator 6-3, and a display 6-. 4. Apply power supply voltage to the transmitter 3 and receiver 4.

FIG. 3 is a block diagram showing the configuration of the transmitter 9 and receiver 8 for remote control. This transmitter 9 is
By pressing keys for sending various commands provided on the keyboard 9-1, the pulse generator 9-3, which inputs the output signal of the oscillator 9-2, is activated.
An operation signal (for example, an ultrasonic wave, an infrared pulse, etc. signal) is generated from the transmitting circuit 9-4. In addition, in FIG. 3, 9-5 is a power supply, which supplies power supply voltage to the oscillator 9-2 and the pulse generator 9-3. The operation signal emitted from this transmitter 9 is received by a remote control receiver 8, and a command signal which is an output signal of this receiver 8 is applied to the computer 6-3. In addition to the above, the input signals that are applied from the remote control transmitter 9 to the computer 6-3 via the remote control receiver 8 include the following, for example.

Input of atmospheric pressure correction (temperature and atmospheric pressure).

Input mechanical constants and prism reflector constants.

Command input for displaying horizontal distance, slope distance, and relative height difference.

Command input for switching between meters and feet as the measuring distance unit.

Command input for continuous measurement by continuous movement of prism reflector. That is, a command is input to measure the continuous movement amount from the light wave range finder body to the prism reflector, and the movement amount of the prism reflector with the installation point of the prism reflector set as zero.

Command input for sensitivity display. That is, input a command to display the collimation sensitivity of the rangefinder body to the prism reflector on the display.

Command input for high/low switching of the power supply installed outside or inside the rangefinder body.

When these input signals are applied to the computer 6-3, the computer 6-3 performs various operations according to the input signals and also issues various control signals.
Operations associated with distance and vertical angle measurements are performed.

When measuring the distance and vertical angle to reflector A installed at the target point with the light wave range finder configured as described above, install this light wave range finder at the measurement point and connect the power source 6-5. After turning on a switch (not shown) and determining the installation direction by collimating the reflector A with the telescope 10 or the sight sight 11, various command signals are sent from the remote control transmitter 9. This command signal is received by the remote control receiver 8 and transmitted to the computer 6-3 in the electric circuit 6. Now, if you press the keyboard 9-1 of the remote control transmitter 9 and emit a command signal for sensitivity display from this transmitter 9, this command signal will be sent to the remote control receiver 8.
is added to the computer 6-3 via. In this calculator 6-3, the command to display the collimation sensitivity is sent to the display 6-4.
The value is displayed digitally. At this time, if the above-mentioned collimation operation is not performed correctly, it will be displayed on the display 6-4, so the person operating the light wave rangefinder will need to use the display 6-4 to re-collimate. The rangefinder body 1 is moved vertically and horizontally according to the sighting sensitivity digitally displayed, and the installation direction of the rangefinder body 1 is adjusted so that the sighting sensitivity is maximized (the sighting error is minimized). adjust. Next, when the keyboard 9-1 is pressed and a command signal for displaying the horizontal distance is emitted from the transmitter 9, this command signal is applied to the calculator 6-3 via the receiver 8. This calculator 6-3 calculates the horizontal distance by inputting the output signal from the receiver 4 via the waveform shaping circuit 6-2, and the value is digitally displayed on the display 6-4. Other measurements such as vertical angle measurements are also performed in the same manner as above. Therefore, with this light wave rangefinder, not only distance measurement and vertical angle measurement can be performed, but also the above-mentioned operations after collimation associated with these measurements can be performed using the remote control transmitter without touching the rangefinder body 1. 9, the rangefinder main body 1 does not move, and therefore accurate measurements can be made in a short time, significantly improving work efficiency.

Since this light wave range finder can measure distances and vertical angles, it can be used as a variety of surveying instruments such as flat surveying, as shown in FIG. FIG. 4 shows an example in which this rangefinder is used to construct an alidade, an example in which it is mounted on a tripod, and an example in which it is mounted on a transit. below,
Examples of their use will be explained below.

FIG. 5 is a diagram illustrating an alidade constructed using the above-mentioned light wave range finder, in which figure A is a front view, figure B is a rear view, figure C is a right side view, and figure D is a left side view.
To construct the alidade, a fixing plate 22 having an L-shaped cross section is pivotally attached to a support 21 fixed to a scale stand 20 via a shaft 23, and the light wave rangefinder main body 1 is placed on this fixing plate 22 and screwed. Fix it at 24. Rangefinder body 1
Since the fixed plate 22 moves up and down around the shaft 23, a vertical fixing knob 25 is used to fix the vertical movement.
is provided on the support column 21, and a vertical fine movement knob 27 for finely moving the shaft 23 via a lever 26 is attached to the fixed plate 22. The scale table 20 has a scale 28 on one side, a horizontal fine adjustment knob 29 on the other side, and a slide plate 31 with a ball bearing 30 attached to the bottom.
are provided for each. Horizontal fine movement knob 2
By rotating the scale 9, one end of the slide plate 31 moves left and right in conjunction with the rotation, thereby performing fine horizontal adjustment of the scale table 20 and correct collimation. In practice, the optical axis of the transmitter 3 (defined by the light transmitting lens 3-2) and the axis of the scale 28 are in a vertical plane (in FIG. In order to eliminate eccentricity errors, it is desirable that the two planes be parallel to each other in a plane perpendicular to . Ball bearing 30 attached to sliding plate 31
is for smooth movement on the flat plate. Further, a power battery 6-5 for applying a power supply voltage to the electric circuit 6 in the range finder main body 1 is detachably housed in the scale stand 20.

By attaching the main body 1 to the scale stand 20 as shown in FIG. 5, it is possible to accurately measure the distance and direction to the target and easily draw it on a flat plate.

FIG. 6 shows the range finder body 1 mounted on a tripod. A leveling plate 41, a direction table 42, and a pedestal 43 are mounted on a tripod 40, and the rangefinder main body 1 is fixed onto this pedestal 43 with screws 44. In this way, the rangefinder body 1 is attached to the tripod 40 and used for various types of surveying such as traverse surveying and triangulation. Since the rangefinder main body 1 houses a vertical angle detector 5, it can also be used as a level.

FIG. 7 is a diagram showing the range finder main body 1 attached to a transit. This rangefinder main body 1 is fixed onto a transit 50 with an adapter 51. By attaching the rangefinder body 1 to the transit 50, the transit 50 can measure horizontal angles, etc.
This optical rangefinder can measure distances and simplify surveying work. In this way, the optical range finder described above can be used as a stadia measuring instrument or attached to the transit 50 or the like.

As mentioned above, in this invention, a conventional light wave rangefinder is equipped with a vertical angle measurement function and a remote control function, and is cased so that the scale line and optical axis are aligned with each other via a support. It is possible to accurately measure the direction and distance of a target point without the need for multiple types of equipment, and to plot the measurement results directly on a flat plate using a scale. You can get a light wave range finder that can be lost.

Therefore, according to the light wave range finder according to the present invention,
From flat plate surveying to general surveying, traditionally, tape measures,
Measurements that previously required tape or the like can be easily performed. In addition to the range of measurements taken with conventional rangefinders, the field of application includes various measurements in workplaces, and surveys in fields such as civil engineering, architecture, forestry, etc., including oblique distance, horizontal distance, vertical distance, It can be used in fields that require angle and relative height.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing the structure of a light wave rangefinder according to an embodiment of this invention, Fig. 2 is a block diagram showing the structure of the electric circuit, and Fig. 3 shows the structure of a transmitter/receiver for remote control. The block diagram, Fig. 4 is a diagram showing an example of the use of a light wave range finder, and Figs. Front view, Figure B is a rear view, Figure C is a right side view, Figure D is a left side view, Figure 6 is a view of the light wave range finder mounted on a tripod, Figure 7 is a light wave range finder. FIG. 1...Light wave range finder body, 3...Transmitter, 4...
Receiver, 5... Vertical angle detector, 6... Electric circuit,
6-3...Computer, 6-4...Display device, 8...Remote control receiver, 9...Remote control transmitter.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A scale stand with a smooth surface in contact with a flat plate and a scale provided on one side in the longitudinal direction, a column fixed to the top of this scale table, and support on this column. The case is provided with a sighting means for sighting a target point, a vertical angle detector for detecting a vertical angle, and a remote control receiver for receiving an operation signal for remotely controlling the measurement. It is equipped with a light wave rangefinder main body whose optical axis is aligned with the direction of the graduation arrangement of the scale, and a remote control transmitter that transmits the operation signal, so that the direction, distance, etc. of the target point can be plotted on the flat plate. A light wave rangefinder. 2. The light wave range finder according to claim 1, wherein the remote control transmitter is detachably attached to the scale stand. 3. On the contact surface of the scale table with the flat plate,
The light wave range finder according to claim 1 or 2 of the utility model registration claim, in which a bearing is attached. 4. The light wave distance measuring device according to any one of claims 1 to 3, wherein the sighting means includes a sighting sight for sighting at short distances and a sighting telescope for sighting at long distances. Ceremony.