JP2829912B2 - 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 scanning a laser beam to form a measurement reference plane.

[0002]

2. Description of the Related Art As an apparatus for obtaining a measurement reference plane, there is known a laser surveying instrument which scans a plane with a laser beam and forms the reference plane with the laser beam.

In such a laser surveying instrument, a surveyor needs a required contrast in order for a surveyor to clearly recognize a reference plane or a reference line with a laser beam, and the laser beam is sufficient for surrounding light. It is necessary to have brightness. Therefore, if the intensity of the laser beam is increased, the reference line can be easily recognized by the laser beam. However, increasing the intensity of the laser light may harm the eyes of a surveyor, and the law limits the intensity of the laser light. Therefore, in a conventional laser surveying instrument, when the surroundings are bright, the scanning speed is reduced in order to increase the luminance of the reference line by the laser light.

[0004]

However, if the scanning speed is reduced too much, the waiting time until the laser beam passing through the work location makes one rotation and returns is lengthened, resulting in poor workability. In addition, since the laser light is emitted in a pulse shape, the reference line of the laser light becomes a broken line in relation to visual perception, so that there is a problem that the work is difficult to perform.

In view of such circumstances, the present invention makes it possible to repeatedly scan a laser beam within a required range, eliminate a waiting time when the scanning speed is reduced in order to obtain a luminance, and achieve a sufficient luminance. It was made available.

[0006]

SUMMARY OF THE INVENTION The present invention relates to a laser surveying instrument that forms a reference plane by rotating and scanning a laser beam.
A scanning motor, a scanning angle detection circuit for detecting a scanning angle of the laser beam, a scanning angle controller for switching and controlling the rotation direction of the scanning motor, and a scanning angle setting circuit for setting a scanning angle. The scanning motor is configured to be driven in reverse so that the scanning angle set by the setting circuit matches the scanning angle detected by the scanning angle detection circuit, and a scanning speed detection circuit, a scanning speed controller, a scanning speed setting circuit, And a configuration in which a required scanning speed can be set.

[0007]

The laser beam repeatedly scans a range necessary for the operation to form a reference line and a reference plane. Therefore, the luminance of the reference line increases, the contrast of the reference line increases, and the recognition of the reference line becomes easy, and the luminance of the reference line can be optimized by adjusting the scanning speed.

[0008]

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

FIG. 1 and FIG. 2 are sectional views showing an embodiment of the present invention.

A truncated conical recess 6 is formed in the center of the casing 5, and a support seat 7 is formed in 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.

The laser projector 10 has a hollow structure in which a hollow portion penetrates vertically, and a laser beam projecting optical system 67 shown in FIG. 5 is housed in the hollow portion.

An internal 59 is slidably fitted in the hollow portion, and an objective lens 55 is provided on the internal 59 so that the optical axis coincides with the axis of the laser projector 10. The half prism 52 is provided below the objective lens 55 so as to coincide with the optical axis of the objective lens 55, and the half prism 5 is provided.
Laser diode 50 that emits visible laser light to the side of 2
Is arranged. A condenser lens 51 is provided between the laser diode 50 and the half prism 52, and a concave mirror 53 is provided so as to face the condenser lens 51 with the half prism 52 interposed therebetween. The lower converging lens 5 is aligned with the optical axis of the objective lens 55 below the half prism 52.
4 is provided.

The laser beam emitted from the laser diode 50 is split by the half prism 52 into an upper vertical laser beam and a transmitted laser beam, and the upper vertical laser beam passes through the objective lens 55. The transmitted laser light is reflected by the concave mirror 53, further reflected downward by the half prism 52, transmitted through the lower condensing lens 54, and emitted as lower vertical laser light.

An adjustment arm 68 extends from the internal 59 through the laser projector 10 and is connected to a focusing nut 60 screwed to a focusing adjustment screw 61 described later. The focus adjusting screw 61 is provided so as to be rotatable in parallel with the laser projector 10 so as to extend over upper and lower intermediate substrates 69 and 70 provided on the side of the laser projector 10, and to be provided at one end of the focus adjusting screw 61. The driven gear 62 is fitted. A focusing motor 64 is provided on the lower intermediate substrate 70,
Focusing gear 63 fitted to the output shaft of the focusing motor 64
Is engaged with the driven gear 62.

When the focusing gear 63 is driven, the focusing adjustment screw 61 is rotated, and the focusing nut 60 is moved up and down. The focus state of the transmitted laser light from the laser diode 50 is adjusted.

The head 11 of the laser projector 10 is aligned with the axis of the laser projector 10 via a bearing 12,
The mirror holder 13 is provided rotatably. The scanning gear 17 is fitted to the mirror holder 13 and the scanning gear 17 is meshed with the gear 16 as described above.
As a result, the mirror holder 13 is rotated about the vertical axis.

An angle detection pattern (not shown) is formed on the lower surface of the scanning motor 15 by alternately forming a reflection pattern that reflects light and a non-reflection pattern that does not reflect light at the same pitch on the same circumference. In addition, the motor seat 14 is provided with a light emitter / receiver 72 facing the angle detection pattern, emits light from the light emitter / receiver 72 to the angle detection pattern, and receives light reflected from the angle detection pattern. Thus, the rotation angle and the rotation speed of the mirror holder 13 can be detected.

A pentahalf mirror 5 for splitting the upper vertical laser light into transmitted light and reflected light is provided on the mirror holder 13.
6 and a pentamirror 57 for reflecting the laser light reflected from the pentahalf mirror 56 in the horizontal direction. The laser light emitted from the laser projector 10 is emitted horizontally through the light projecting window 19 and the pentahalf mirror 5 is emitted.
The laser light transmitted through 6 is emitted upward as upper vertical laser light.

Below the laser projector 10, a level sensor 20 and a level sensor 21 for detecting horizontality are provided. A holding arm 71 extending to the side of the laser projector 10;
Is provided at the end of the holding arm 71.
The vertical inclination sensor 65 is disposed in parallel with the optical axis of the laser light projecting optical system 67 of the laser projector 10.

A tilt detector 23 is fixed to the lower end of the laser projector 10, and the tilt detector 23 has an inverted cup shape and a reflector flange 22 formed around the periphery. Also, at the bottom of the casing 5, at a position facing the inclination detecting body 23,
When the casing 5 and the laser projector 10 are in a vertical state, a required number (four in this embodiment) of a set of light-emitting and light-receiving elements is formed on the same circumference around the axis of the laser projector 10. Optical sensors 24a, 24b, 24c, 24d are provided.

When the laser projector 10 is greatly inclined, the light emitted from the optical sensors 24a, 24b, 24c and 24d is reflected by the reflector flange 22 and sensed by the optical sensors 24a, 24b, 24c and 24d. , It is detected that the laser projector 10 is greatly inclined.

The tilting arm 25 and the tilting arm 26 extend horizontally from the head 11 of the laser projector 10 in a horizontal direction, respectively, penetrate the conical surface of the recess 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. The engagement pin 27 and the engagement pin 28 have a columnar shape, and the axes of the cylinders are orthogonal to each other and determine a positional relationship such that they are included in a plane passing through the spherical center of the spherical portion 11a. Further, one of the engagement pins 27 and the engagement pins 28, for example, the engagement pin 27 is restricted from moving in the horizontal direction, and can be moved only in the vertical direction. Although not particularly shown, the engaging pin 27 is slidably engaged with the vertically extending guide groove, or the engaging pin 27 is slidably engaged with the vertically extending wall surface via a biasing means such as a spring. For example, means such as pressing on the surface may be considered.

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 which is orthogonal to the engaging pin 28 and extends 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 bolts 46 for leveling. Reference numeral 47 denotes a glass window surrounding the mirror holder 13;
Is a ceiling window glass transmitting the upper vertical laser light.

The laser surveying instrument of this embodiment can be used both in a vertical posture and in a horizontal posture (in a state where FIG. 1 is tilted to the left). At least three auxiliary feet 6
6, at least one of which is height-adjustable.

FIG. 6 shows a control device for the leveling function of this embodiment.

The level sensor 20, the level sensor 21
Are input to the leveling control unit 91 via the switching unit 90 (described later). The leveling control unit 91
Level sensor 20 and level sensor 21 input to
Is further input to the switching angle detection circuit 106 and the angle detection circuit 107, and the angle detection circuit 106 and the angle detection circuit 107 have a reference angle 105 (normally, the reference plane is horizontal and the reference angle is 0 °). The reference angle 10 has been input by the angle detection circuit 106 and the angle detection circuit 107.
5, the calculated angle deviation is input to a motor controller 108 and a motor controller 109, respectively, and the motor controller 108 and the motor controller 109 operate the motor controller 108 and the motor controller 109 so that the deviation becomes zero. The level adjustment motor 31 and the level adjustment motor 32 are driven.

The angle deviations of the angle detection circuit 106 and the angle detection circuit 107 are inputted to a discriminator 110, which discriminates the angle detection circuit 106 and the angle detection circuit 107.
Is selected, and the output corresponding to the change in the selected angle deviation is displayed on the display driver 111.
, And the display driver 111 causes the display 112 to perform a display according to the value of the deviation.

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

In the state where the main body 4 is installed 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. When the reference angle 105 is 0 °, the angle detection circuit 106 and the angle detection circuit 107 output an angle deviation signal. When the angle deviation signal is output, the motor controllers 108 and 109 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 31 and 32 will 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 engagement pin 27, and tilts the laser projector 10.

As described above, since the engagement pin 27 is restricted in horizontal movement and can move only in the vertical direction, the tilting direction of the laser projector 10 is restricted and passes through the spherical center of the spherical portion 11a. The engagement pin 28 is tilted about its axis. Next, when the level adjustment motor 32 is driven,
The screw shaft 39 rotates and the engaging pin 28 moves up and down via the pin 42.

The horizontal movement of the engagement pin 27 is regulated by a groove (not shown), and the vertical movement is regulated by the pin 38 and the spring 44. Only a rotation about the axis of the engagement pin 27 passing through the center of the spherical portion 11a is allowed. When the pin 42 is moved up and down, the engagement pin 28 is vertically moved while sliding between the pin 42 and the engagement pin 28 in the axial direction. Is tilted about the axis of the engagement pin 27.
Here, as described above, since the cross section of the engagement pin 27 is a circle, the rotation of the engagement pin 27 does not change the inclination of the axis of the engagement pin 27. That is, the tilting movement by the level adjusting motors 31 and 32 does not affect the tilting of the other tilting shaft, that is, the axis of the engaging pin 27 and the engaging pin 28. Therefore, the tilt adjustment work of one axis can be performed independently of the tilt adjustment work of the other axis, and the tilt adjustment work and the control sequence related to the tilt adjustment work are significantly simplified.

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 proceeds, the detection values from the level sensors 20 and 21 also approach horizontal, and finally the motor controller 10
8 and the angle deviation output from the motor controller 109 becomes 0, and the leveling operation is completed.

The detection range of the level sensor 20 and the level sensor 21 is narrow. When the level 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 to detect that the limit of the mechanical adjustment range has been reached. 31, 32 are stopped,
Alternatively, 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 leveling bolt 46 so as to be within the adjustment range.
Start leveling operation 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.

The emission state of the laser beam is a parallel light beam unless otherwise specified. However, in order to make the projection position on a projection surface, for example, a wall surface more clear, the laser beam is focused on the projection surface. The focusing motor 64 is driven to rotate the focusing adjustment screw 61 via the focusing gear 63 and the driven gear 62, and the internal 59 is slid together with the focusing nut 60. To change the position of the objective lens 55 to focus the laser beam on or near the wall surface.

In addition to the formation of the horizontal reference plane by the laser light, the upper and lower vertical laser light and the lower vertical laser light are emitted upward and downward. You can ask.

In the leveling operation described above, it takes some time from the start of leveling to the completion of leveling. During this time, the progress of the leveling operation is displayed to the operator to inform the operator that the leveling operation is being performed properly, thereby eliminating the worker's anxiety.

The discriminator 110 judges the magnitude of the angle deviation output from the angle detection circuit 106 and the angle detection circuit 107, selects the larger angle deviation, and displays the state of change of the selected angle deviation. The output is output to the display driver 111, and further, the display content is changed according to the change in the angle deviation and displayed on the display 112.

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 106 and the angle detection circuit 107 may be obtained, and the display content may be changed according to the value of the sum of the angle deviations.

FIG. 7 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. 8 to 10 are exemplified.

FIG. 8 shows an example in which a plurality of arrows 114 arranged in a horizontal direction are displayed on a display panel 113 of a display 112, and an arrow 1 which lights up as the leveling operation progresses.
14 moves to the left, and when the leveling operation is completed, [START] is lit and the operation proceeds to the next operation.

In FIG. 9, the remaining time required for leveling is indicated by a display 115 or the like.

In FIG. 10, the indicator light 116 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 at points, it may be supported by projections at 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. However, it goes without saying that a plane inclined at a predetermined angle with respect to the horizontal 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.

Next, a scanning speed control device for the scanning motor 15 of this embodiment will be described with reference to FIG.

As described above, the rotation speed of the motor 15 is detected by the light emitter / receiver 72, and the detection result of the light emitter / receiver 72 is input to the pulse transmitter 74, and the pulse transmitter 74 / D conversion, signal processing such as amplification is performed,
The output from the pulse transmitter 74 is a rotation speed detection circuit 75,
The rotation angle detection circuit 75 and the detection signal of the scanning angle detection circuit 78 are input to the microcomputer 76, respectively. The microcomputer 76 receives a scanning speed setting signal from a scanning speed setting circuit 81 and a scanning angle setting signal from a scanning angle setting circuit 82.

The microcomputer 76 issues a speed command signal to the scanning speed controller 77 based on the signal from the rotation speed detecting circuit 75 and the scanning speed setting signal from the scanning speed setting circuit 81. The scanning speed controller 77 changes the speed of the scanning motor 15 according to the speed command signal,
Also, the scanning motor 15 is adjusted to a scanning speed corresponding to the scanning speed setting signal.

The microcomputer 76 issues an inversion command signal to the scan angle controller 80 based on the signal from the scan angle detection circuit 78 and the signal from the scan angle setting circuit 82. The scanning angle controller 80 matches or changes the scanning angle of the scanning motor 15 with the scanning angle setting signal from the scanning angle setting circuit 82 according to the inversion command signal.

The scanning speed setting circuit 81 and the scanning angle setting circuit 82 are respectively connected to an input section 83, and an operation section 84 and a receiving circuit 85 are connected to the input section 83. The scanning speed setting by the scanning speed setting circuit 81 and the scanning angle setting by the scanning angle setting circuit 82 can be performed directly from the operation unit 84.
It is also possible to input a signal to the reception circuit 85 from the transmission circuit 7 via a transmission circuit 86.

A focusing controller 79 is connected to the microcomputer 76, and a focusing adjustment signal from the operating section 84 or the remote controller 87 is sent to the input section 8.
3, the microcomputer 76 outputs an adjustment signal to the focusing controller 79. The focusing controller 79 drives the focusing motor 64 to drive the focusing motor 64. The objective lens 55 is moved via the adjustment arm 68 and the internal 59 to adjust the gathering position of the front laser beam.

Next, the operation of the scanning speed control will be described.

The laser surveying instrument can be used in a vertical posture or a horizontal posture. However, when the laser surveying device is used in a vertical posture, the laser surveying device is installed in a vertical state, the leveling operation is completed, and the laser beam is emitted from the laser diode 50. And the light emitting window 19
The laser beam is emitted in the horizontal direction, and the scanning motor 15 is further driven to rotate the mirror holder 13. The laser light emitted in the horizontal direction is rotated by the rotation of the mirror holder 13 to form a horizontal reference plane. When the work is performed based on the horizontal reference plane formed by visible laser light, The position confirmation is based on the afterimage of the operator. Therefore, in order for the operator to confirm the trajectory of the laser beam as a complete line, the scanning speed needs to be higher than a predetermined speed. Also, as described above, the intensity of the laser beam is restricted by laws and regulations for reasons such as eye protection, and if the scanning speed is too high, the brightness decreases,
Work becomes difficult.

For this reason, the measurer can select the scanning speed so that the scanning speed is most suitable for the work.

The scanning speed is set by the operation unit 84 or the remote controller 87. The setting signal is sent to the microcomputer 7 via the scanning speed setting circuit 81.
6, a speed command signal is issued from the microcomputer 76 to the scanning speed controller 77, and the scanning speed controller 77 drives the scanning motor 15 so as to match the speed command signal. The rotation of the scanning motor 15 causes the light emitter / receiver 72 to emit a signal. The signal is input to the rotation speed detection circuit 75 as a digital pulse signal by the pulse transmitter 74.

In the rotation speed detecting circuit 75, a pulse of a constant width is transmitted in synchronization with the pulse signal from the pulse transmitter 74. Is detected, and the scanning speed is calculated. That is, the pulse interval from the light emitter / receiver 72 changes in accordance with the rotation speed of the scanning motor 15, and the integrated value of the pulse signal having the constant width changes in accordance with the pulse interval. This integral value corresponds to the speed, and the scanning speed can be detected (see FIG. 12).

The detected scanning speed is input to the microcomputer 76. The microcomputer 76 compares the detected scanning speed with the scanning speed setting signal from the scanning speed setting circuit 81, and compares the detected scanning speed with the detected scanning speed. Further, the scanning motor 15 is controlled via the scanning speed controller 77 so that the two values coincide.

What is necessary for the actual work is a part of the horizontal reference plane. Therefore, the scanning range of the laser beam need only be the part necessary for the work. In this embodiment, if the scanning angle is set, the scanning motor 15 repeats normal rotation and reverse rotation within the set angle range. By setting the scanning angle and scanning the laser light, it is substantially equivalent to increasing the brightness of the laser light, and when the speed is reduced, the laser light passed by one rotation returns to the working position again. There is no waiting time to come and work becomes easier.

The scanning angle is set by the operation unit 84 or the remote controller 87.

The scanning angle setting circuit 82 issues a scanning angle setting signal to the microcomputer 76, and the microcomputer 76 sets the scanning angle so that the scanning angle is set at a position where the scanning angle setting signal is inputted and the scanning angle is set. The control unit 80 drives the scanning motor 15 in reverse.

Rotation angle (scan angle) of scan motor 15
Corresponds to the number of pulses transmitted by the pulse transmitter 74. The scanning angle detection circuit 78 is connected to the pulse
Is counted, and the result is input to the microcomputer 76. The microcomputer 76 receives a scan angle from the scan angle setting circuit 82, and compares the signal of the scan angle detection circuit 78 with the scan angle setting signal. At the same time, an inversion command signal is issued to the scan angle controller 80, and the scan angle controller 80
, The scanning motor 15 is driven in reverse in the range of the set scanning angle.

Even when the scanning motor 15 is activated within the range of the set scanning angle, it goes without saying that the scanning speed can be controlled in parallel.

As described above, the laser surveying instrument of this embodiment can be used in a vertical posture or a horizontal posture, but when used in a vertical posture (the state shown in FIG. 1), the vertical inclination sensor 65 The signal is ignored, and when used in a horizontal posture, the signals from the level sensor 20 and the level sensor 21 are ignored. Accordingly, the control function is switched between the use in the vertical posture and the use in the horizontal posture. The switching of the control function will be described with reference to FIG.

The horizontal state and the vertical state of the laser surveying instrument are detected by a mercury switch 89 provided at a required position of the laser surveying instrument. The detection result of the mercury switch 89 is input to the microcomputer 76.

As described above, the signals from the level sensor 20 and the vertical inclination sensor 65 are supplied to the switching section 9.
The level adjustment motor 32 is input to the leveling control unit 91 via the control signal 0, and the level adjustment motor 32 is controlled by the leveling control unit 91.
A signal from the level sensor 21 is input to a tilt control unit 93 and a leveling control unit 91 via a switching unit 92, and the level adjustment motor 31 is connected to the tilt control unit 93 or the leveling control unit. The drive is controlled by 91.

The input section 83 is connected to the microcomputer 76, and the microcomputer 7
The input to 6 includes a manual switch 94 for turning on / off the automatic leveling function and a tilt input switch 95 for tilting the laser projector 10. The input mode is appropriately controlled by the operation unit 84 or the remote controller 87. It can be switched.

When the laser surveying instrument is in the vertical position, the mercury switch 89 detects the vertical state of the surveying instrument and inputs the same to the microcomputer 76. The microcomputer 76 issues a switching signal to the switching section 90 and the switching section 92 to send the vertical tilt sensor 65.
Are ignored and the level sensor 20,
A signal from the level sensor 21 is input to the leveling control unit 91 to enable leveling operation.

When the laser surveying instrument is set in a horizontal posture and supported by the auxiliary foot 66, the mercury switch 89 detects the horizontal state of the laser surveying instrument and the microcomputer 76
To enter. The microcomputer 76 issues a switching signal to the switching unit 90 and the switching unit 92, and a signal from the vertical inclination sensor 65 is input to the leveling control unit 91 to enable leveling operation. Also, the signals of the level sensors 20 and 21 are prevented from being input to the leveling control unit 91.

In this state, the upper vertical laser light and the lower vertical laser light serve as reference laser lights emitted in the horizontal direction. Further, by rotating the scanning motor 15, a vertical reference plane is formed. can do.

The horizontality of the upper vertical laser light and the lower vertical laser light can be adjusted by driving the level adjusting motor 31 by the vertical inclination sensor 65.

When an input for tilting the laser projector 10 is issued by the tilt input switch 95 regardless of the horizontal or vertical attitude of the laser surveying instrument, a switching signal is issued to the switching unit 92 via the microcomputer 76. By ignoring the level sensor 21 and operating the level adjustment motor 31 via the tilt control unit 93, the laser projector 1
Tilt 0.

It should be noted that for the rough adjustment,
Adjust the height of the two.

FIG. 14 shows an example of the operation unit 84 provided on the laser surveying instrument main body.
103 is a switch for switching between scanning and rotation, 97 is a switch for setting the scanning speed and rotation speed, 98 is a switch for setting the scanning angle, 99 is a focusing operation switch, Reference numeral 100 denotes a switch for turning on / off the automatic control function, 101 denotes a changeover switch that enables the detection position of the laser beam to be detected by a detector, and 102 denotes a power switch.

FIG. 15 shows an example of the operation unit of the remote controller 87. Reference numeral 97r denotes a scanning speed setting switch, reference numeral 98r denotes a scanning angle setting switch, and reference numeral 99r denotes a focusing operation switch.

[0084]

As described above, according to the present invention, since the laser beam can scan the range necessary for the work, the luminance of the reference line increases, and the contrast of the reference line can be increased without increasing the luminance of the laser beam. It has an excellent effect that it becomes larger and the reference line can be easily recognized.

[Brief description of the drawings]

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

FIG. 2 is a sectional view of a main part showing an embodiment of the present invention.

FIG. 3 is a view as viewed in the direction of arrows AA in FIG. 1;

FIG. 4 is a view taken in the direction of arrows BB in FIG. 1;

FIG. 5 is a basic configuration diagram of a laser beam projecting optical system in the embodiment.

FIG. 6 is a leveling work control block diagram of the present embodiment.

FIG. 7 is a diagram showing a relationship between an angle deviation and a leveling time.

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 an example of a display example for displaying a transition of a leveling state.

FIG. 10 is an explanatory diagram showing an example of a display example for displaying a transition of a leveling state.

FIG. 11 is a scanning speed control block diagram of the present embodiment.

FIG. 12 is a diagram showing an example of speed detection in the scanning speed control.

FIG. 13 is a block diagram illustrating control function switching according to a posture change in the present embodiment.

FIG. 14 is an explanatory diagram illustrating an example of a main body operation unit.

FIG. 15 is an explanatory diagram of a remote controller.

[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 adjustment motor 32 level adjustment motor 50 laser diode 52 half prism 56 pentahalf mirror 59 internal 61 focusing adjustment screw 64 focusing motor 65 vertical Tilt sensor 67 laser beam projection optical system 74 pulse transmitter 75 rotation speed detection circuit 76 microcomputer 77 scanning speed controller 78 scanning angle detection circuit 80 scanning angle controller 81 scanning speed setting circuit 82 scanning angle setting circuit 89 mercury switch

Continuation of the front page (72) Inventor Mitsutoshi Ooka 75-1, Hasunuma-cho, Itabashi-ku, Tokyo Inside Topcon Corporation (56) References JP-A-4-95711 (JP, A) (58) Fields investigated (Int. Cl ^6, DB name) G01C 5/00 -. 5/06 G01C 15/00 - 15/14

Claims (4)

(57) [Claims] In a laser surveying instrument for forming a reference plane by rotating and scanning a laser beam, a scanning motor, a scanning angle detection circuit for detecting a scanning angle of the laser beam, and switching control of the scanning motor rotation direction. A scan angle controller, and a scan angle setting circuit for setting a scan angle, wherein the scan motor is controlled so that the scan angle set by the scan angle setting circuit matches the scan angle detected by the scan angle detection circuit. A laser surveying instrument configured to be driven in reverse. 2. A laser surveying instrument which forms a reference plane by rotating and scanning a laser beam, a scanning motor, a scanning angle detecting circuit for detecting a scanning angle of the laser beam, a scanning speed detecting circuit, and the scanning motor. A scanning angle controller for switching and controlling the rotation direction, a scanning speed controller for controlling the scanning speed,
A scanning angle setting circuit for setting a scanning angle; and a scanning speed setting circuit for setting a scanning speed, wherein the scanning angle set by the scanning angle setting circuit matches the scanning angle detected by the scanning angle detection circuit. A laser surveying instrument wherein the scanning motor is driven in reverse and the required scanning speed can be set by the scanning speed setting circuit. 3. A receiving unit is connected to the scanning angle setting circuit,
2. The laser surveying instrument according to claim 1, wherein a scanning angle can be set by a remote controller via said receiving unit. 4. The laser surveying instrument according to claim 2, wherein a receiving unit is connected to the scanning angle setting circuit and the scanning speed setting circuit, and the scanning angle and the scanning speed can be set by a remote controller via the receiving unit.