JP3078640B2 - Laser surveying machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laser surveying instrument for forming a measurement reference plane by using a laser beam.

[0002]

2. Description of the Related Art As a device for obtaining a reference plane by a laser beam, there is a laser surveying instrument which scans a laser beam in the same plane or spreads a light beam by a conical prism to form a reference plane by the laser beam.

[0003] Such a laser surveying instrument is provided so that a reference plane formed by a laser beam is always a horizontal plane or a predetermined inclination angle from the horizontal plane, regardless of the state of the laser surveying instrument. There is a mechanism for tiltably controlling the laser projector, and the laser surveying instrument performs a leveling operation for adjusting the attitude of the laser projector before the start of measurement.

[0004] In some of the laser surveying machines, the leveling operation described above is automatically performed by providing a motor and a driving mechanism. In the case of the conventional automatic leveling adjustment mechanism, a leveling operation is started when an operator presses a leveling start button, and when the leveling operation is completed, a completion lamp is lit.

[0005]

When the leveling operation is automatically performed, it takes some time from the start to the completion of the leveling operation. After giving the laser surveying instrument support to start the leveling operation, the measurement operator waits until the leveling operation is completed,
The leveling time varies depending on the initial position of the laser projector, and since the state of progress of the leveling operation was not known in the conventional apparatus, the operator knows whether or not the operation for leveling is being performed appropriately. I couldn't do that, which caused anxiety to the workers.

The present invention has been made in view of the above circumstances, and aims to provide an operator with information on the progress of the leveling operation so that the operator can handle the laser surveying instrument comfortably.

[0007]

SUMMARY OF THE INVENTION The present invention relates to a laser surveying instrument for forming a reference plane by using a laser beam, a laser projector for projecting the laser beam, a drive mechanism for leveling the projector, and a display. From the start of leveling of the drive mechanism.
The contents displayed on the display unit are changed in accordance with the progress of the leveling state until the quasi-completion .

[0008]

[Function] When the drive mechanism is operated and the laser projector is leveled, a display according to the progress of leveling is made, and the operator can know the leveling status by sequentially changing the display. it can.

[0009]

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

FIG. 1 is a sectional view showing an embodiment of the present invention.

A truncated conical recess 6 is formed at the center of the casing 5, and a support seat 7 is formed at the center of the recess 6. The support seat 7 is formed with a projection 9 which is smoothly raised on a cubic curved surface at a position equally divided into three on the inner periphery of the circular through hole 8.

A laser projector 10 for emitting a laser beam is dropped into the through hole 8, and a head 11 of the laser projector 10 is engaged with and supported by the support seat 7. The lower part of the head 11 has a spherical shape.
Abut. Thus, the laser projector 10 is supported so as to be freely tiltable in any direction with respect to the perpendicular. A motor seat 14 is provided on the head 11, a scanning motor 15 is provided on the motor seat 14, and a gear 16 is fitted on an output shaft of the scanning motor 15. The gear 16 is a scanning gear 1 described later.
7 is engaged.

A mirror holder 13 is rotatably provided on the head 11 of the laser projector 10 via a bearing 12 so as to match the axis of the laser projector 10. The mirror holder 1
3 is fitted with a scanning gear 17 and meshed with the gear 16 as described above.
3 is rotated about a vertical axis. The mirror holder 13 is provided with a pentaprism 18 so that the laser beam emitted from the laser projector 10 is emitted horizontally through the projection window 19.

A level sensor 20 and a level sensor 21 for detecting horizontality are provided below the laser projector 10, and an inclination detector 23 is fixed to a lower end of the laser projector 10,
The inclination detecting body 23 has an inverted cup shape and has a reflecting mirror flange 22 formed around it.

The bottom of the casing 5, at a position facing the tilt detector 23, and the same circumference around the axis of the laser projector 10 when the casing 5 and the laser projector 10 are in a vertical state. Required number above (four in this embodiment)
Sensors 24a, 24a comprising a set of light emitting elements and light receiving elements
4b, 24c and 24d are provided.

A tilting arm 25 and a tilting arm 26 extend horizontally from the head 11 of the laser projector 10 in a horizontal direction, and respectively penetrate through the conical surface of the concave portion 6 and are positioned inside the casing 5. An engaging pin 27 and an engaging pin 28 are protruded from the tips of the two tilting arms 25 and 26.

A shelf board 29 and a shelf board 30 are provided on the inner wall of the casing 5, a level adjustment motor 31 is provided on the shelf board 29, and a level adjustment motor 32 is provided on the shelf board 30. A drive gear 34 is fitted to the drive gear 33 and the level adjustment motor 32. The engagement pin 2
7, a rotatable screw shaft 35 extending between the ceiling of the casing 5 and the shelf plate 29 is provided, and a driven gear 36 is fitted on the screw shaft 35. The driven gear 36 is connected to the drive gear 33. To be engaged. A slide nut 37 is screwed onto the screw shaft 35, a pin 38 is protruded from the slide nut 37, and the pin 38 and the engaging pin 27 are slidably contacted.

Similarly, a screw shaft 39 orthogonal to the engaging pin 28 and extending between the ceiling of the casing 5 and the shelf 30 is rotatably provided, and a driven gear 40 is fitted to the screw shaft 39. The driven gear 40 meshes with the drive gear 34. The screw shaft 39
And a slide nut 41 is screwed into the
And a pin 42 is provided so as to protrude, and the pin 42 and the engaging pin 28 are slidably contacted with each other.

A spring receiver 43 is provided between the screw shaft 35 and the screw shaft 39 on the ceiling of the casing 5, and a spring 44 is stretched between the spring receiver 43 and the laser projector 10.
The laser projector 10 is urged clockwise about the support seat 7 in FIG.

In the figure, reference numeral 45 denotes a battery box for storing a battery for driving the laser surveying instrument. The main body 4 of the laser surveying instrument is provided on three legs (not shown) via leveling bolts 46. Reference numeral 47 denotes a glass window surrounding the periphery of the mirror holder 13.

FIG. 4 shows a control device according to this embodiment.

The level sensor 20, the level sensor 21
Are input to an angle detection circuit 51 and an angle detection circuit 52, respectively. A reference angle (normally, the reference plane is horizontal and the reference angle is 0 °) 50 is input to the angle detection circuits 51 and 52. The setting has been input, and both angle detection circuits 5
1. An angle detection circuit 52 calculates an angle deviation based on the reference angle 50, and the calculated angle deviation is input to a motor controller 53 and a motor controller 54, respectively. Drives the level adjustment motor 31 and the level adjustment motor 32 such that the deviation becomes zero.

The angle deviation of the angle detecting circuit 51 and the angle detecting circuit 52 is input to a discriminator 55,
5 selects the larger one of the angle deviations of the angle detection circuit 51 and the angle detection circuit 52, outputs an output corresponding to a change in the selected angle deviation to the display driver 56, and drives the display driver. The device 56 causes the display 57 to display a value corresponding to the deviation value.

The leveling operation of the laser surveying instrument will be described below.

When the main body 4 is grounded and no adjustment is made, the axis of the laser projector 10 generally does not coincide with the vertical line,
The level sensor 20 and the level sensor 21 are not horizontal. If the reference angle 50 is 0 °, the angle detection circuit 51 and the angle detection circuit 52 output an angle deviation signal. When the angle deviation signal is output, the motor controllers 53 and 54 drive the level adjustment motor 31 and the level adjustment motor 32 in required directions so that the angle deviation signal becomes zero.

The operation related to the two level adjustment motors will now be described, for example, the level adjustment motor 31.

When the level adjustment motor 31 is driven,
The rotation of the level adjustment motor 31 is controlled by the drive gear 33,
The power is transmitted to the screw shaft 35 via the driven gear 36, and the rotation of the screw shaft 35 causes the slide nut 37 to move up and down. The vertical movement of the slide nut 37 is transmitted to the tilt arm 25 via the pin 38 and the engaging pin 27, and tilts the laser projector 10.

The laser projector 10 has a spring 4
4, the laser projector 10 accurately follows the movement of the slide nut 37.

With respect to the tilting operation of the laser projector 10,
As described above, since the spherical portion 11a of the laser projector 10 is supported at three points by the protrusions 9, the laser projector 1
0 is stable and stable, and the spherical portion 11a
The laser projector 10 can smoothly and freely move in any tilting direction because of the contact between the projection 9 and the projection 9 formed with a smooth curved surface, and the posture of the laser projector 10 can be easily adjusted.

When the laser projector 10 tilts and leveling advances, the detection values from the level sensors 20 and 21 also approach horizontal, and finally the motor controller 53
And the angle deviation output from the motor controller 54 becomes 0,
Leveling operation is completed.

The level sensor 20 and the level sensor 21 have a narrow detection range. When the detection range exceeds a predetermined range, the level sensor 20 is saturated, and the inclination direction can be detected but the value of the inclination angle cannot be detected. Therefore, the level adjustment motors 31 and 32 and the drive gears 33 and 3 exceed the mechanical adjustment range.
4, driven gears 36 and 40, screw shaft 3
5, 39, slide nuts 37, 41, tilting arm 2
The optical sensors 24a, 24b, 24c, 24d are provided so that the adjusting mechanism composed of 5, 26 and the like does not operate. That is, when the limit of the mechanical adjustment range is reached, the optical sensor 2
Light emitted from any one of 4a, 24b, 24c and 24d is reflected by the reflecting mirror flange 22 and received again by the optical sensor, and it is detected that the limit of the mechanical adjustment range has been reached. , 32 are stopped, or the display device indicates that the mechanical adjustment range is at the limit, or an alarm such as a buzzer is issued.

In such a case, coarse adjustment is performed using the screw bolts 46 for level setting so as to be within the adjustment range, and the leveling operation is started again.

When the leveling operation is completed, a laser beam is emitted from the laser projector 10, and the scanning motor 15 is driven to rotate the laser projector 10 about a vertical axis. By emitting light in the horizontal direction and further rotating it, a horizontal reference plane is formed by laser light.

In the leveling operation, it takes some time from the start of leveling to the completion of leveling. During this time, the progress status of the leveling operation is displayed on the display 57, and the operator can know the leveling operation status by sequentially changing the display, and the anxiety of the operator is eliminated.

The discriminator 55 judges the magnitude of the angle deviation output from the angle detection circuit 51 and the angle detection circuit 52, selects the larger angle deviation, and displays the state of change of the selected angle deviation. Output to the device driver 56, and further changes the display content in accordance with the change in the angle deviation.
Display.

The reason for selecting the larger angle deviation is as follows.
This is because more time is required for adjusting the angle with the larger angle deviation. Instead of selecting the magnitude of the angle deviation, the sum of the angle deviations output from the angle detection circuit 51 and the angle detection circuit 52 may be obtained, and the display content may be changed according to the value of the sum of the angle deviations.

FIG. 5 shows the relationship between the angle deviation and the time. A position at which the display content is changed is set in advance based on this relationship, and the display is switched when the angle deviation reaches the set position.

As the display contents, those shown in FIGS. 6 to 8 are exemplified.

In FIG. 6, a plurality of arrows 59 arranged in a horizontal direction are displayed on a display panel 58 of a display 57, and an illuminated arrow 59 moves to the left as the leveling operation progresses. When the leveling operation is completed, [S
TART] is lit, and the operation proceeds to the next operation.

In FIG. 7, the remaining time required for leveling is indicated by a display 60 or the like.

In FIG. 8, the indicator light 61 is made to blink, and the speed of the blinking time is changed in accordance with the remaining time required for leveling.

In the embodiment described above, the spherical portion 11a is
Although it is supported by the projections 9 of points, it may be supported by projections of four or more points. In addition, although the projection 9 is raised from the inner peripheral surface of the support seat 7, another component such as a steel ball may be embedded. Alternatively, the embedded steel ball may be freely rotated. In the above description, the reference plane is a horizontal plane, but it is needless to say that an inclined plane can be used as the reference plane. Further, in the above-described embodiment, the reference plane is formed by scanning the laser light. However, the laser light is applied to the conical prism, and the laser light is spread over the entire circumference by the reflection surface of the conical prism, and the reference plane is formed. It may be formed. Further, in the above-described embodiment, the laser light is projected upward, but may be projected downward.

[0043]

As described above, according to the present invention, when the driving mechanism is operated and the laser projector is leveled, a display is made in accordance with the progress of leveling. You can know the situation and work comfortably.

[Brief description of the drawings]

FIG. 1 is a sectional view showing one embodiment of the present invention.

FIG. 2 is a view taken along the line AA of FIG. 1;

FIG. 3 is a view taken in the direction of arrows BB in FIG. 1;

FIG. 4 is a control block diagram of the present embodiment.

FIG. 5 is a diagram showing a relationship between an angle deviation and a leveling time.

FIG. 6 is an explanatory diagram showing an example of a display example for displaying a transition of a leveling state.

FIG. 7 is an explanatory diagram illustrating an example of a display example for displaying a transition of a leveling state.

FIG. 8 is an explanatory diagram showing an example of a display example for displaying a transition of a leveling state.

FIG. 9 is an explanatory diagram showing a conventional example.

[Explanation of symbols]

 Reference Signs List 10 laser projector 15 scanning motor 20 level sensor 21 level sensor 25 tilting arm 26 tilting arm 31 level adjusting motor 32 level adjusting motor 35 screw shaft 37 slide nut 41 slide nut

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) G01C 15/00 G01C 5/00 G01C 9/00-9/36

Claims (1)

(57) [Claims] 1. A laser surveying instrument that forms a reference plane with laser light, comprising: a laser projector for projecting laser light; a driving mechanism for leveling the projector; and a display.
A laser surveying instrument configured to change the content displayed on the display unit in accordance with the progress of the leveling state from the start of leveling to the completion of leveling of the drive mechanism.