JP2003035539A - Laser positioning device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve working efficiency by automating to solve such problems that the positional adjustment is very hard to manually carry out using a laser positioning device and needs a long time. SOLUTION: A photo detecting device having a transmitting means which transmits a remote operation signal operating a laser optical device remotely, and a calculating means which calculates the difference between laser light and the center of a photo detecting plane, is employed, and the remote operation signal which rotates a laser optical system toward the center of the photo detecting plane is transmitted by the transmitting means.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laser positioning device using laser light, which is used for marking out work at construction sites and the like.

[0002]

2. Description of the Related Art In a marking operation using a laser beam at a construction site, the laser projection device is manually rotated for alignment by a light receiving device placed on a design reference position.

[0003]

The marking operation by laser light at a construction site is usually performed by using a laser projection device.
Positioning accuracy of about ± 1 mm with respect to the design reference position is required at a point m away. Therefore, there is a problem that manual adjustment is extremely difficult and takes time.

An object of the present invention is to automate the conventional manual marking operation and improve the work efficiency.

[0005]

The above-mentioned object is provided with a transmitting means for transmitting a remote control signal for remotely controlling a laser optical device, and a calculating means for calculating a difference between a laser beam and a center of a light receiving surface. This is achieved by using a light receiving device that transmits a remote control signal for rotating the system to the center of the light receiving surface by the transmitting means.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings showing one embodiment. The laser projection device projects the laser light in the vertical direction, and at the same time, the reference light 62 is emitted downward from the center axis.
Of the laser optical system 1 for projecting the laser beam, the rotary table 2 for manually rotating the laser optical system 1 when the driving means is stopped, the motor 3 for constituting the driving means of the present invention for rotating the laser optical system 1, and the motor 3. A gear group 4 which constitutes a gear reduction unit of the present invention for decelerating the rotation and transmitting it to the rotary base 2, a control unit 5 for controlling the rotation direction, the number of rotations, and the rotation angle of the motor 3, and a battery 6 serving as a power source of the laser positioning device , A receiving means for receiving and demodulating a remote control signal, an antenna 8 for receiving the signal, a gantry 9 for storing the rotary base 2, the motor 3 and the like. It should be noted that the remote operation may be performed by any method of electromagnetic waves (including radio waves and infrared rays) and ultrasonic waves. Antenna 8 for remote control by infrared
May be replaced with an infrared receiving module, and in the case of ultrasonic waves, an ultrasonic microphone may be used instead of the antenna 8.

A block circuit diagram of the control means 5 is shown in FIG. The control means 5 demodulates the output from the antenna 8 which receives the transmission signal from the laser light receiving device and reads the output signal of the reception circuit 21 and the reception circuit 21 which outputs the demodulated signal, and the rotation direction and rotation of the motor 3. It is composed of a microcomputer 22 for controlling the speed and the rotation angle, a motor drive means 23 for driving the motor 3 in accordance with an output signal from the microcomputer 22, and an EEPROM 24 in which the gear backlash amount of the gear group 4 of the gear reduction means is stored in advance. It EEPRO
The M24 may be built in the microcomputer 22. Also, E
When the EPROM 24 is not mounted, the program may be written in a ROM or a flash ROM that is built in or attached to the microcomputer 22.

As shown in FIG. 3, the laser receiving device has a light receiving window 31 which also serves as a filter for transmitting only light in the vicinity of the wavelength of the projected laser light, a center marker 32 which indicates the center of the light receiving window 31, It comprises a power switch 33, an automatic adjustment switch 34, an LED 35 as a display means, a buzzer 36, and a control means 37.

A block circuit diagram of the control means 37 is shown in FIG. A light receiving element 41 including a solar cell, a linear CCD, etc., which receives the projected laser beam and outputs the received position.
The center position of the light receiving element 41 and the light receiving position of the projected laser light are detected, and the motor 3 of the laser projection device is detected based on the detected values.
The microcomputer 42, which is a calculating means for determining the rotating direction and the rotating speed of the, and transmitting the remote control signal, and the transmitting means 4 for modulating the remote control signal from the microcomputer 42 into a signal for transmission.
3, antenna 4 for transmitting the transmission signal from the transmission means 43
It is composed of 4.

The light receiving element 41 is arranged inside the light receiving window 31 with its center aligned with the center marker 32. For example, when a solar cell is used as the light receiving element 41, a solar cell panel having four cells A, B, C and D is used as shown in FIG. 4, and the distance between the central panels B and C is the positioning accuracy range. Has become. When the projected laser beam is received by the panel A, only the output on the A side is obtained. The projected laser light rotates the turntable 2 so that the panel A
When going from the outside to the center of the four panels A, B,
The output signals of C and D are as shown in FIG. Therefore, the output is switched from the panel A to the panel B, and when the output from the panel B disappears next time, the projected laser light coincides with the central marker 32. When the laser light is directed from the outside of the panel D to the center, the output is switched from the panel D to the panel C, and then the output from the panel C is lost.

In the positioning work using the laser positioning device of the present invention, as shown in FIG.
With the lower reference light 62 projected below the rotation center axis of the laser optical system 1, the rotation center axis of the laser optical system 1 of the laser projection apparatus 61 and the vertical reference point 63 are aligned. The laser light receiving device 64 is installed so that the center marker 32 and the reference line 65 coincide with each other. Next, the projected laser reference light 6
After manually moving 6 to the vicinity of the laser receiving device, the operator presses the automatic adjustment switch 34 of the laser receiving device to automatically align the laser light up to the target reference line 65 and perform the alignment. Is completed, LED3
5 is turned on, and the buzzer 36 instructs the operator to complete positioning.

The remote operation is possible not only from the laser receiving device but also from a remote controller provided separately,
It is also possible to manually operate the rotation direction, rotation speed, and rotation angle by a remote controller to position the laser beam.

FIG. 7 shows an operation flow of the microcomputer 42 which is a calculation means of the laser light receiving device. When the operator presses the automatic adjustment switch 34 (step 701), first the light receiving element 4
If there is no laser beam projected from the laser optical system 1 on the laser beam 1 (step 702), the motor 3 is rotated in the forward rotation direction at a high speed (here, the direction in which the laser beam first reaches the panel A side, that is, right rotation). A remote control signal for continuous rotation is sent to the device (step 703). When the laser light projected on the panel A of the light receiving element 41 arrives (step 7
04), switching the rotation of the motor 3 to a minute step rotation operation that secures a minimum rotation angle (less than 0.036 ° when the positionable distance is 10 m) sufficient for the accuracy required for the positionable distance, The turntable 2 is rotated step by step (step 705). When the laser light reaches the center of the light receiving element, the output from panel B is also lost (step 706). If, for some reason, the laser light goes too far in the center during the automatic adjustment and the output is from the panel C (step 707), the motor 3 is rotated in the reverse direction (step 708) and the alignment is performed again.

When both outputs from the panel BC finally disappear (step 709), the motor 3 is stopped (step 709) and the operator is informed by the buzzer 45 and the LED 35 that the positioning has been completed (step 710). The automatic positioning operation ends (step 711).

When there is an output from the light receiving element 41 first, the output position is detected (step 712), the motor 3 is rotated in small steps toward the center, and automatic adjustment is performed.

FIG. 8 shows an operation flow of the microcomputer 22 of the laser projection device. Normally, the microcomputer 23 stands by in the state of waiting for a remote control signal (step 81). When receiving the remote control signal from the laser receiver, the command is determined,
In the high speed rotation mode (step 82), the drive signal is continuously output to the motor 3 (step 83). When a stepping motor is used as the motor 3, this drive signal becomes a pulse for continuously driving the stepping motor, and when a normal DC motor is used, the drive signal is P
It becomes a WM signal or the like, and becomes a signal for continuously rotating the motor 3 at a constant speed. When the signal of the minute step rotation operation is received and the feeding direction is the same as the previous rotation direction (step 84), a predetermined amount of driving signal for minute feeding is output to the driving means (step 85). If the signal changes to the opposite direction,
The backlash amount is read from the EEPROM 24 (step 86), and a drive signal corresponding to the amount is output to the motor drive means 23 to prevent operation delay of the gear group when switching to reverse rotation (step 87). When a stepping motor is used as the motor 3, this drive signal becomes a signal for rotating the stepping motor step by step, and the amount corresponding to the backlash amount is stored as the step amount of the stepping motor. When a normal DC motor is used, the drive signal becomes a PWM signal or the like, and is stored as the time for rotating the motor 3 and the rotation speed. When there is no received signal, the motor is stopped (step 88) and the system stands by.

[0017]

According to the present invention, the positioning of the marking line by the laser can be automated and the working efficiency can be improved.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of a laser projection apparatus that constitutes the present invention.

FIG. 2 is a block diagram of a control circuit of a laser projection device that constitutes the present invention.

FIG. 3 is a front view showing an operation surface of a laser light receiving device which constitutes the present invention.

FIG. 4 is a block diagram of a control circuit of a laser light receiving device which constitutes the present invention.

FIG. 5 is a time chart showing an output pattern when a laser beam is received by the light receiving element that constitutes the present invention.

FIG. 6 is a perspective view showing a working state of a positioning work by a laser positioning device.

FIG. 7 is a flowchart for explaining the operation of the laser light receiving device that constitutes the present invention.

FIG. 8 is a flowchart for explaining the operation of the laser projection apparatus that constitutes the present invention.

[Explanation of symbols]

41 light receiving element, 42 a microcomputer, 43 a transmitting means, 34
Is a switch, 35 is an LED, and 36 is a buzzer.

Claims (4)

[Claims] 1. A laser projection device comprising a laser optical system for projecting laser light in a vertical direction, a horizontal direction or both directions, and a laser light received on the light receiving surface of the projected laser light and received on the light receiving surface. When the position coincides with the center of the light-receiving surface, the light-receiving device instructing the operator aligns the design reference position with the laser beam, and the laser beam aligned with the design reference position is used as a marking line. A positioning device, wherein the laser projection device is provided with the laser optical system in a frame horizontally, vertically or rotatably provided in both directions, a decelerating means for decelerating the rotating table by gears, and a decelerating means. A drive means such as a motor for driving the rotary base, a control means for controlling the drive means, a rotation direction, a rotation speed and a rotation angle of the rotary base can be remotely controlled. And a light receiving means, the light receiving means includes a calculating means for calculating a difference between a laser light receiving surface center installed on a design reference position and the laser light receiving position, and a transmitting means for transmitting a remote control signal. A laser positioning device comprising a control means for rotating a laser optical system of a laser projection device by operation to automatically match a position of a laser beam with a center of a light receiving surface. 2. An operator automatically presses a laser light to a desired position by pressing an automatic adjustment switch provided on the laser receiver, and when the positioning is completed, an instruction to complete the positioning is issued. Claim 1 characterized by
The laser positioning device described. 3. The laser positioning device according to claim 1, wherein the remote control means is operated by radio waves, infrared rays, ultrasonic waves or the like, and is remotely operated by wireless. 4. The laser positioning device according to claim 1, 2 or 3, wherein the minimum rotation angle of the laser optical system in remote operation is less than 0.036 °.