JPS6195207A - Elevation angle reference position setting mechanism of electronic theodolite - Google Patents

Abstract

PURPOSE:To enable simultaneous automatic correction of an elevation angle with a non-expensive machine, by installing reference position detecting signal emitter and inclination angle signal emitter on an incremental encoder. CONSTITUTION:A reference position detecting signal emitter 15 is composed of luminous element 4, lend 12, reference position detecting slit 9, reference position detecting mask 6 and reference position detecting light-receiving element 10. Signals from an inclination angle signal emitter 17 connected to a clinometer 14 and from a reference position signal emitter 15 are introduced into an inclination angle data reading and recording apparatus 18 and a counter setting signal is issued. These signals and an output signal from an angle-measuring signal emitter 16 connected to an angle-measuring light-receiving element 5 are calculated by a counter 19 and displayed with an indicator 20 in degrees.

Description

[Detailed Description of the Invention] [Object of the Invention] Industrial use... = This invention is used for side lids, etc., and uses an incremental encoder to measure the altitude angle and Related to the altitude angle reference position setting mechanism of electronic theodolites that measure horizontal angles 1 to 0 Conventional technology・・・・・・・・・・・・Theodolites used for surveying are It has a vertical axis that rotates horizontally and a horizontal axis that rotates the telescope vertically, and the rotation angle is determined by a scale plate provided on each axis and an optical micrometer that reads the scale lines on the scale plate. , horizontal angle arrangement t to read the altitude angle. A part of the optical system of the micrometer is constructed parallel to the telescope barrel, and is structured to rotate together with the telescope. The scale plate is 90° or 27° when the telescope is horizontal and the scale line above the optical reading microscope receiver is read.
The structure is such that it is adjusted and fixed at 0° and rotates with the rotation of the telescope.

In addition, the machine may tilt due to outdoor work, and in that case, an altitude angle correction mechanism, that is, a correction mechanism that always reads the vertical scale line even if the machine is tilted during measurement, is activated. It is designed to correct errors.

Electronic theodolites have angle detection methods using incremental encoders and absolute encoders, as described below.In both cases, the part that reads the scale lines is electronic. The structure is the same except for the 'gR boundary and the altitude angle correction mechanism. That is, the horizontal angle and altitude angle are read by an incremental encoder or an azosoline encoder, and are digitally displayed on a display. In the case of an azosolinet encoder, it has its own position information, just like the scale dial, so when the telescope is horizontal, it is
It is necessary to adjust and set in advance so that the
Ru. On the other hand, the incremental encoder itself does not have position information, so in order to set the horizontal position of the telescope to 900 or 270°, use a telescope to reference a certain point, rotate the vertical axis 180°, and repeat the above steps again. Set the same point as the standard and set the sum of half the difference between the angle count value and 180° and 90° or 2700 in the counter of the incremental encoder, or
It is necessary to align the bubble tube installed on the telescope with the horizontal position and set the counter at 90' or 270°.

Also, since it does not have an altitude angle correction mechanism, it has the disadvantage that it cannot correct errors caused by tilting of the machine during measurement.

The problem that the invention aims to solve...
...As mentioned above, the absolute encoder has its own position information and does not require operation like the incremental encoder.The disadvantage is that the force ζ structure is complicated and expensive. On the other hand, an incremental encoder is relatively inexpensive, but requires the above-mentioned operation to measure the angle of rotation.

[Structure of the invention]

Means to solve problems・・・・・・・・・・・・
...In the present invention, as shown in Fig. 1, a city air type inclinometer QJ for detecting the inclination angle in the reference direction of the telescope is provided inside the machine, and an angle measurement slit ( 8
) is provided with a reference position detection slit (9) separately from the second
As shown in the figure, the light emitter (4), the lens α, the mask for detecting the reference position (6), and the light receiving frame for detecting the cardinal position ti are arranged, and the l - Take the quasi-position signal, detect the output signal of the inclinometer at the time when +J'4j occurs, and calculate the difference between this signal and 900° or 270° to the counter a9 of the incremental encoder shown in Figure 4. Set. The queen reference position detection slit (
9) and the reference position detection mask (6) are adjusted in advance so that the reference position signal is generated when the telescope is in a horizontal position. Also, adjust the horizontal position of the telescope to 90° or 2
After setting the angle to 70°, the angle with respect to the machine's inclination is calculated by the signal from the inclinometer 04 and the contents of the counter Q1 of the incremental encoder, and the altitude angle with respect to the machine's inclination is automatically corrected moment by moment and the altitude angle is displayed. There is one thing that makes me do it.

Example: As shown in Figure 1, the altitude angle scale (1) is mounted around the rotation axis (2) provided on the telephoto lens (3). When the telescope (3) rotates, the altitude angle dial (0) also rotates. The altitude angle dial (1) is provided with side angle slits (8) that divide the circumference into 21,600 equal parts. Also, the altitude angle scale (1
) is provided with a reference position detection slit (9) in addition to the angle measurement slit (8), and the reference position detection slit (9) transmits one or more rays of light. It is made up of slits.

The configuration of the encoder for counting the angle measurement slits (8) is as shown in FIG. Figure 2 is Y-Y' in Figure 1.
There is an enlarged sectional view 1 of the encoder in which an altitude angle dial (1) is placed, a light emitting element (4) is placed on one side, and a light receiving element for angle measurement detection (5) is placed on the opposite side.

αa is a lens 1 for converting the light from the light emitting element (4) into parallel light. As shown in Fig. 3, a mask for angle measurement slit detection (7) and a mask for reference position detection (6) are installed between the height angle eye, plate (1) and the light receiving element for angle measurement detection (5). is placed. The masks (6) and (7) are contained in a mask frame (not shown), and the angle measurement slit detection mask (7) faces the angle measurement slit (8) with a slight gap therebetween. The reference position detection mask (6) is also located at a position facing the reference position detection slit (9).

The masks (6) and (7) are attached to the main body I and configured to be adjustable. When the reference position detection mask (6) and the reference position detection slit (9) match, a reference position detection signal is obtained. It has been adjusted so that it can be obtained when the situation arises. Although an optical incremental encoder is used in the embodiment, an incremental encoder such as an electromagnetic VL conductive encoder (inductosin) or other magnetic encoder is sufficient, and is not limited to the embodiment. a◆ is machine a
In order to obtain a signal of the inclination of υ, the telescope is fixed in a direction such that the inclination in the reference direction is detected. Inclinometers include a method that measures the inclination of a pendulum, and a method that uses electrolyte solution in a bubble tube and its movement.

However, either method can be applied to the embodiment of the present invention.

As explained above, the light emitting element (4), the slit for detecting the reference position of the lens 11 (9), and the mask for detecting the reference position (6)
, the signal output from the reference position detection signal generator (to) constituted by the light receiving element a0, the output signal of the incremental enneader, and the angle signal from the inclinometer a41 are the fourth
Processing is performed using the block diagram shown in the figure. That is, the fourth
In the figure, aSt is a reference position detection signal generator,
It is coupled to the reference position detection light receiving element QG, and αQ is an angle measurement signal generator, which is coupled to the angle measurement detection light receiving element (5). aη is an inclination angle signal generator, and the signals from the inclination angle signal generator aη and the reference position signal generator a, which are coupled to the inclinometer I, are counted by the inclination angle data reading and writing device ttS. A set signal is obtained, this signal and the output signal from the angle measurement signal generator αe are calculated by the counter 0, and the display (to) 1 angle is displayed.

〔Effect of the invention〕

As mentioned above, by providing a reference position detection signal generator and an inclination angle signal generator to a conventional incremental encoder, the altitude angle is fixed to an absolute angle with respect to the vertical line with respect to the inclination of the machine. It is possible to provide an inexpensive machine that can provide the same effect as

Additionally, by providing an inclination angle signal emitter, automatic correction of the altitude angle can be performed at the same time.

[Brief explanation of drawings]

Fig. 1 is a front view of the present invention, Fig. 2 is an enlarged sectional view taken along Y-Y' in Fig. 1, Fig. 3 is a front view of the reference position detection mask and the angle measurement slit detection mask, and Fig. 4 is the altitude. There is a block diagram 1 of the corner reference position setting mechanism. (1)...Altitude angle dial, (4)...Light emitting element, (
7)...Angle measurement slit detection mask, (8)...Angle measurement slit, (9)...Reference position detection slit, 6
- Light receiving element, ■... Inclinometer, αe... Signal generator for angle measurement.

Claims (3)

[Claims] (1) In an electronic theodolite equipped with an incremental encoder for altitude angle detection, a reference position detector for detecting the reference position of the theodolite is provided separately from the angle measurement slit of the altitude scale, and the vertical angle of the theodolite is An inclinometer is installed to detect the inclination from the surface, and the altitude angle is set to the vertical line by setting the calculation result of the reference position signal from the altitude angle dial and the inclinometer signal in the counter of the encoder. An altitude angle reference position setting mechanism for electronic theodolites, which is characterized by fixing to an absolute angle based on . (2) The altitude dial is equipped with a magnetic incremental encoder and a mechanism for detecting the reference position of the encoder, and also for detecting the inclination of the theodolite from the vertical plane using the magnetic incremental encoder. Claim 1, comprising: an inclinometer;
The altitude angle reference position setting mechanism of the electronic theodolite described in . (3) The altitude dial is equipped with an electromagnetic induction type incremental encoder, and a mechanism for detecting the reference position of the above-mentioned inductosin type incremental encoder, and the vertical surface of the theodolite using the above-mentioned electromagnetic induction type incremental encoder. An altitude angle reference position setting mechanism for an electronic theodolite according to claim 1, further comprising an inclinometer for detecting an inclination from an angle.