JPH0119042Y2 - - Google Patents

Description

[Detailed description of the invention] This invention automatically detects the inclination angle of machines, instruments, and other objects when installing them using an optical mechanism built into the pendulum mechanism, and installs them at the desired angle.
Or, it relates to an automatic tilt detection device that can provide materials for correction, and is capable of measuring minute tilt angles, improves the ability to resolve tilt angles, and achieves high accuracy. The purpose of this invention is to obtain an automatic inclination detection device.

The present invention will be described below with reference to the embodiments shown in the drawings.

A movable reflecting mirror 5 is suspended from the main body 16 by four hanging lines 4, 4, 4, 4. That is, the movable reflecting mirror 5 is attached to a frame 6, and the other ends of the hanging wires 4, 4, 4, 4, which have one end fixed to the four corners of the frame 6, are connected to the main body 16.
Hanging from, hanging line 4, movable reflecting mirror 5, and hanging point 4',
4' to form an imaginary line in the shape of an inverted trapezoid, or the hanging wires 4, 4, 4, 4 are hung so as to intersect with each other, and the arm 14 with its lower end fixed to the frame body 6 is erected upward. Then, a brake plate 10 formed of a conductor is attached above the arm 14, and a weight 11 is attached above the brake plate 10 so that its vertical position can be adjusted or replaced.

A rare earth magnet 9 is fixed to one side of the main body 16 facing both sides of the brake plate 10, and an iron plate 15 is fixed to the other side. An optical mechanism, which will be described later, is incorporated into the pendulum mechanism configured as described above. That is, the light source 1 is provided in the operating direction of the pendulum mechanism. The light source uses an LED or LD, and a pinhole 13 is provided in the front. A lens 2 and a fixed reflector 3 are provided between the light source 1 and the movable reflector 5.
The light beams from a light source 1 and a pinhole 13 are made into parallel beams by a lens 2, bent downward by a fixed reflecting mirror 3, and refracted and reflected upward by a movable reflecting mirror 5.
A fixed reflecting mirror 12, an imaging lens 8, and a light receiving sensor 7, such as an image sensor or a CCD, are provided on the refracted and reflected optical axis. Thus, the light source 1, pinhole 13, lens 3, imaging lens 8, and light receiving sensor 7 are fixed to the main body 16.

In the above embodiment, the weight 11 is moved in the vertical direction in order to tilt the arm 14 β with respect to the tilt α of the main body 16, and the brake plate 10 and the rare earth magnet 9 are
Magnetic braking is performed by the iron plate 15. That is, a brake plate 10 formed of a conductor is placed between the rare earth magnet 9 and the iron plate 15 (between the magnetic fields of the magnet), and this brake plate 1
When the pendulum swings with the pendulum mechanism, an eddy current is generated in the brake plate 10 due to electromagnetic action, and the magnetic field created by this eddy current acts in the opposite direction to the movement direction as a force that attempts to hinder the movement of the moving body (magnetic braking). Brake the mechanism. Thus, in FIG. 3, when the main body 16 is tilted by α, the movable reflecting mirror 5 is tilted by β. That is, the optical axis is doubled by 2β, and the focal length of the imaging lens 8 is
Then, the amount of movement Δs=2βf, and if the light receiving sensor 7 receives it, the amount of change can be electrically read. The output of the light receiving sensor 7 is amplified by an amplifier 17,
perform calculations. It passes through the CPU circuit 18 and is displayed on the digital display 19. Light receiving sensor 7 For example, the spacing between image sensor elements is about 10μ, and f = 50mm.
If this is the case, the angle will be about 4'' and a highly accurate inclinometer will be obtained.

β can be freely changed by moving the weight 11 up and down or changing the interval between the hanging points 4'. Therefore, since the slope can be made such that α≦β, it is possible to obtain accuracy higher than that described above.

As described above, the present invention makes it possible to measure minute inclination angles, improves inclination angle resolution, and has the effect of providing a highly accurate inclination automatic detection device.

[Brief explanation of the drawing]

FIG. 1 is a side view of the present invention, FIG. 2 is a right side view of a portion of FIG. 1 taken longitudinally, and FIG. 3 is a diagram showing the principle of operation of the present invention. DESCRIPTION OF SYMBOLS 1... Light source, 2... Lens, 3... Fixed reflecting mirror, 4... Hanging line, 5... Movable reflecting mirror, 6... Frame, 7... Light receiving sensor, 8... Imaging lens, 9...
... Rare earth magnet, 10 ... Braking plate, 11 ... Weight, 12 ... Fixed reflector, 13 ... Pinhole,
14...Arm, 15...Iron plate, 16...Body, 17
...Amplifier, 18...CPU, 19...Display device.

Claims (1)

[Scope of utility model registration request] The other ends of four suspension lines 4, one end of which is fixed to the four corners of the movable reflector 5 attached to the frame body 6, are suspended from the main body 16 in the direction of gravity, and an arm 14 that stands upward is attached to the frame body, A brake plate 10 and a weight 11 are attached to the arm, facing both sides of the brake plate,
A rare earth magnet 9 is placed on one side of the main body 16, and an iron plate 1 is placed on the other side.
5, a light source 1 with a pinhole 13 provided in the operating direction of the pendulum mechanism;
A lens 2 and a fixed reflector 3 are provided between the movable reflector 5 and the light source 1, the lens 2, the fixed reflector 3, and the movable reflector 5.
An automatic tilt detection device characterized in that a fixed reflecting mirror 12, an imaging lens 8, and a light receiving sensor 7 are provided on the reflected optical axis of the optical axis of the movable reflecting mirror 5.