JP2578235Y2 - Auto collimation level - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic collimating level capable of automatically pointing a level body in a staff direction.

[0002]

2. Description of the Related Art In a conventional level, a level body is manually aimed at a staff and a scale is collimated.

[0003]

According to the above-mentioned conventional level, the level body has to be manually turned to the staff and the operation is troublesome. The purpose of the present invention is to solve such problems at the conventional level.

[0004]

In order to achieve the above object, the invention according to claim 1 comprises a level body which is horizontally rotated by a motor, a light transmitting optical system provided in the level body, A light receiving optical system for receiving light reflected by a staff provided on the main body, and control means for stopping a motor at a horizontal rotation position of the level main body where an output of a light receiving sensor of the light receiving optical system exceeds a set value. It is characterized by the following. The invention according to claim 2 is the invention according to claim 1, wherein the light receiving sensor is a linear image sensor, and an automatic reading unit that automatically reads a staff height display code from an output of the linear image sensor. It is characterized by having.

[0005]

According to the construction of the first aspect of the present invention, when the motor is driven to rotate the level main body horizontally, the light emitted from the level main body is rotationally irradiated, and when the light hits the staff, the light formed on the staff is obtained. The light is reflected by the reflection surface and received by the light receiving sensor of the level body. When the output of the light receiving sensor exceeds a set value, the control means stops driving of the motor and stops horizontal rotation of the level body. Thus, the level body automatically turns to the staff.

According to the second aspect of the present invention, the level body automatically faces the staff and the height code of the staff is automatically read from the output of the linear image sensor which is a light receiving sensor by the automatic reading means. .

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.

In FIG. 1, reference numeral 1 denotes a casing which is a level body. The casing 1 has a vertical axis 2 fixed to the casing, supported by a barrel 3, and a horizontal plate 4 integrally formed at the lower end of the barrel 3. By being carried on the leveling table 5, the leveling table 5 is horizontally and rotatable, and a spur gear 7 and a spur gear 7, which are axially mounted on a rotating shaft thereof by a motor 6 fixed to the horizontal board 4. Spur gear 8 meshed with this and axially mounted on longitudinal axis 2
And driven to rotate. In the casing 1, an objective lens 9, a dichroic prism 10, a focusing lens 11, and an automatic optical axis correction mechanism 1 are provided from the front thereof.
2, an optical path splitting prism 26, a focusing screen 13, and an eyepiece 14 are sequentially arranged, and a light emitting element 15, a lens 24, a light receiving element 16, and a lens 25 are fixed above and below the dichroic prism 10. The light emitting element 15, the lens 24, the dichroic prism 10, and the objective lens 9 constitute a light transmission optical system, and the light of the light emitting element 15 is reflected by the dichroic prism 10 and transmitted forward from the objective lens 9. Light receiving element 16,
The lens 25, the dichroic prism 10 and the objective lens 9 constitute a light receiving optical system, and the reflected light from a staff (not shown) incident from the objective lens 9 is reflected by the dichroic prism 10, passes through the lens 25, and enters the light receiving element 16. It is supposed to. On the other hand, the scale of the staff is the optical path splitting prism 26.
To form an image on the linear image sensor 27 and to see the scale of the staff image formed on the reticle 13 by the eyepiece 14. The transmitting and receiving optical system is a fixed optical system since it only needs to detect light from a staff.

FIG. 2 shows a block diagram of the control means of the motor 6. The light emitting element 15 emits light in response to a signal from the CPU 17, and light emitted from the objective lens 9 is reflected by a light reflecting surface formed on the surface of a staff (not shown), and the objective lens 9 (see FIG. 2). The light enters the light receiving element 16 via the light receiving element 16 for convenience of explanation).
The light receiving signal converted by the above is input to the control means 18. The control means 18 includes an amplifier 19, a floating binarization circuit 22 including an integration circuit 20 and a comparator 21, and a CPU 17, amplifies the light receiving signal with the amplifier 19, and binarizes the received light signal with the floating binarization circuit 22, Get the peak value. That is, the output signal of the amplifier 19 is directly input to one terminal of the comparator 21, and also becomes an integrated signal having a waveform delayed from the output signal through the integration circuit 20 and is input to the + terminal of the comparator 21. From 21, the light receiving signal is output when the output signal waveform and the integration signal waveform cross each other, that is, when the output signal waveform exceeds a value (set value) close to the maximum value of the output signal. The CPU 17 stops the motor 6 via the motor driver 23 when the binarized light receiving signal is input. If there is no signal, the motor 6 continues to rotate. If the stopping time of the motor 6 is later than the receiving time of the reflected light from the staff, the difference between the stopping time and the receiving time is obtained, and the rotation speed of the motor 6 is determined. The level body 1 is rotated at a low speed in the direction by a distance corresponding to the difference, and the level body 1 is returned to the light receiving position.

In the first embodiment shown in FIG.
Although 6 is provided after the objective lens 9, the level body can be directly opposed to the staff using a linear image sensor instead of the light receiving element 1. FIG. 3 shows a linear image sensor 27.
2 shows an optical system according to a second embodiment using the optical system. In the figure,
The light of the light emitting element 15 is emitted from the objective lens 9 via a lens 28 fixed to the focusing lens 11 so as to move together with the focusing lens 11, a prism 29, and a prism 10A. Prism 1 from objective lens 9
0A, a linear image sensor 27 via a focusing lens 11, an automatic optical axis correcting mechanism 12, and an optical path splitting prism 26.
When the linear image sensor 27 detects the amount of reflected light, the level body can be directly opposed to the staff as in the first embodiment.

Although a height display code is formed on the staff and the focusing lens 11 is moved by a manual method in the first embodiment, a tube (not shown) of the focusing lens 11 and a motor (not shown) are used. The height display code is moved by the connecting mechanism so that the height display code can be read by the linear image sensor 27, the height display code is imaged on the linear image sensor 27, and this is converted from the output of the linear image sensor 27. An automatic reading means for automatically reading is provided, and the staff on the staff side drives the level body rotation motor and the like by a transmission signal such as a wireless signal, and the receiver 30 (level side) and the transmission as shown in FIG. By starting the measurement via the container 31 (on the staff), the surveying can be performed only by the staff on the staff, even if there is no worker on the automatic level side.

[0012]

The invention according to claim 1 is configured as described above, so that the level body can be automatically turned to the staff and the collimation work can be saved. According to the invention described in Item 2, the reading of the staff height display code and the direction detection of the level main body can be performed by the light receiving sensor, which has an effect that the configuration is simple.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a schematic configuration of a main part of an embodiment of the present invention.

FIG. 2 is a block diagram of the above embodiment.

FIG. 3 is a sectional view showing a schematic configuration of a container according to another embodiment of the present invention.

[Explanation of symbols]

 1 level body 6 motor 15 light emitting element 16 light receiving element 17 CPU 18 control means 27 linear image sensor

Claims (2)

(57) [Scope of request for utility model registration] 1. A level body horizontally rotated by a motor, a light transmission optical system provided in the level body, a light receiving optical system provided in the level body for receiving light reflected by a staff, and the light receiving optical system Control means for stopping the motor at the horizontal rotation position of the level body when the output of the light receiving sensor of the system exceeds a set value. 2. The apparatus according to claim 1, wherein said light receiving sensor is a linear image sensor, and further comprising an automatic reading means for automatically reading a staff height display code from an output of said linear image sensor. Auto collimation level.