JP3238235B2 - Altitude sensor for remote-controlled helicopter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an altitude sensor of a remote control helicopter used for spraying pesticides and the like.

[0002]

2. Description of the Related Art Conventionally, an optical sensor using a laser or the like has been generally used as a remote-controlled unmanned helicopter having a constant altitude and an altitude control height sensor. In this type of sensor, a light beam is emitted from a light emitter through a lens and a window glass of the sensor, and the reflected light is received by a light receiver through the window glass and the lens of the sensor. Is stained by scattering of pesticides and the like, so that a filter is put on the window glass surface to prevent the stain.

[0003]

In a conventional remote-controlled altitude sensor of an unmanned helicopter, even if a filter for covering the front window glass of the sensor box is provided, pesticides and the like adhere to the filter. However, the light transmittance of the emitted light and the reflected light is reduced, the light does not return to the light receiver, distance measurement becomes impossible, and control signals are not output. There was a problem in maintenance of the sensor, such as having to replace the filter again.

[0004] The present invention has been made to solve the above problems , and has a light emitting device and a light receiving device provided in a box.
In the box, light is emitted from the light emitting device or the light receiving device.
Or light ray transmission that passes the light beam directed in the vertical direction that is received
A member is arranged so as to intersect these rays,
The filter can be attached and detached below the light transmitting member in
At a position spaced downward from the filter.
The light emitted or received by the emitter or by the receiver
Has an opening through which creates a closed space below the filter
By providing the member detachably below the filter,
I, along with preventing the attachment of agricultural chemicals to light transmission member, and reduce the number of maintenance, further, maintenance
The purpose is to make the work easier .

[0005]

In order to achieve the above object, in the altitude sensor for a remote-controlled helicopter according to the present invention , a light-emitting device and a light-receiving device are provided in a box , and the box is provided with:
The light is emitted or received from the light emitter or the light receiver.
A light transmitting member that passes light rays directed downward is
Arranged so as to intersect with the light beam, the light beam in the box
A filter is detachably placed below the transmission member,
From or in front of the light emitter at a position spaced downward from the
An aperture through which light emitted or received by the light receiver is provided,
The member that forms the closed space below the filter is
Provided detachably on the lower side of the vehicle.

[0006]

When the distance between the helicopter and the ground surface is measured by the altitude sensor of the remote control helicopter configured as described above, the light emitted from the light emitter is reflected on the ground surface through the light transmitting member, The reflected light enters the light receiver via the light transmitting member. At that time, a light-emitting device, a light-receiving device and a light transmitting member for transmitting the respective light beams are installed in the box , and a filter is provided below the light transmitting member in the box.
The filter is detachably arranged, and
Emit light from the emitter or the receiver at a distance
Or with an aperture through which light is received, below the filter
The member that forms the closed space is attached to and detached from the lower side of the filter.
By enabling providing fine particles of pesticide suspended in mist is prevented in the thickness wall of the air in the closed space filter
In addition, it does not reach the light transmitting member , and the amount of pesticide attached can be reduced.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the drawings, an embodiment will be described. FIG. 1 is an overall view of a remote-controlled helicopter equipped with an altitude sensor according to the present invention. FIG. 2 (a), (b), (c)
FIG. 2 is a diagram illustrating a schematic structure of an altitude sensor according to the first embodiment. Figure 3 (a), (b) , (c) is Ru FIG der showing the schematic structure of the altitude sensor of Example 2.

In FIG. 1, reference numeral 1 denotes a remote-controlled unmanned helicopter, and a rotary wing 3 is provided above a fuselage 2.
A rear fuselage 26 extending rearward is connected to the fuselage 2, and a tail rotor 4 is mounted at the rear end. A landing skid 6 is attached to a lower portion of the body 2 via a pillar 5. On the left and right sides of the body 2, a large number of nozzles 8 for spraying pesticides are provided on the support member 7, and the spray nozzles 8 spray the pesticides. An altitude sensor 9 is attached to the rear side of the lower surface of the fuselage 2, and a warning light 10 is provided on the altitude sensor 9 so that the warning light 10 blinks when the height detection signal does not return for a predetermined time. It has become. By the way, in the embodiment of the altitude sensor 9 used here, FIG.
(A) As shown in FIG.
3, a lens 14, and an aperture 15 are installed, and a window glass 16 is attached to a lower surface wall of the box 11.
And a hole 2 for fitting the filter 17 on its lower surface.
2 having a hole 22
The filter 17 is replaceably fitted in the filter 17. A hinged plate 18 having an integrally formed cylindrical body 19 is fixed to the rear surface of the box 11 , and the cylindrical body 19 is rotated around the hinge of the hinged plate 18 to the lower surface of the filter 17. When it is lowered and pressed against the lower surface of the box 11, it is fixed by the latch mechanism 20 provided at the front of the box, and the state shown in FIG. In this state, if the remote-controlled helicopter 1 is flown to spray the pesticide, an air box is formed in the cylinder 19 even if the atomized pesticide in the air flow enters the cylinder 19, so that a filter is formed. 17 is much less likely to be soiled.

Next, a second embodiment will be described.
A spacer 21 having a hole 22 into which the filter 17 is fitted is attached to a lower surface of the box 11, and a stopper 24 having an inverted L-shaped cross-section 23 integrally formed with a cylindrical body 19 on the front side of the box 11 is provided outside the spacer 21. After that, it is fixed to the rear surface of the box with the thumb screw 25. In use, after the filter 17 is fitted into the hole 22 of the spacer 21, inserted into the stopper 24 from the rear of the inverted L-shaped plate 23 from the rear, and attached to the box 11 with the thumb screw 25 and fixed. I do. That the length of the cylindrical body 19 in Example 1 and 2 are those determined in consideration diameter of the filter 17, the other conditions are not needless to say.

[0010]

As described above in detail, the altitude sensor of the remote-controlled helicopter according to the present invention is provided with a light emitting device and a receiving device in a box.
An optical device is provided, and the light receiving device or the light receiving device is provided in the box.
To pass light rays emitted or received by the device in the vertical direction
Light transmissive members are arranged to intersect these rays
And a filter below the light transmitting member in the box.
Is detachably arranged and separated from the filter downward.
Emitted or received by the light emitter or by the light receiver in position
Closed aperture below the filter
The member that forms is detachably provided below the filter.
As the remote-controlled helicopter flies and sprays pesticides, the atomized pesticide in the air stream forms the closed space.
Even inside the member to be formed , an air box is formed in the closed space, and the fine particles of the pesticide floating in the mist are prevented by the thick wall of air and do not reach the filter or the light transmitting member surface, The amount of pesticide applied can be reduced, and as a result, the frequency of maintenance of the altitude sensor is significantly reduced,
It has the effect of increasing the spraying efficiency of the pesticide. In addition, members and filters that form closed spaces
The filter can be removed over time
Easy to filter even if the amount of pesticide applied to
Can be exchanged. Furthermore, the closed space is
The opening provided in the member to be formed is oriented vertically
Naturally, it faces downwards because it passes light rays.
You. Therefore, do the droplets of pesticides scattered during forward navigation
Hard to jump into the closed space, and pesticide adheres to the filter
The amount can be significantly reduced.

[Brief description of the drawings]

FIG. 1 is an overall view of a remote-controlled helicopter equipped with an altitude sensor of the present invention.

FIG. 2A is a diagram showing a schematic structure of an altitude sensor of the present invention. FIG. 2B is a bottom view of FIG. (C)
FIG. 3 is a schematic view of a plane cut along a line BB in FIG.

FIG. 3A is a diagram illustrating a structure of a height sensor according to a second embodiment, centering on a spacer; (B) is a schematic structural diagram of the altitude sensor of Example 2 as viewed from above. (C) is a schematic structural diagram of an altitude sensor of Embodiment 2.

[Explanation of symbols]

 1 Remotely controlled helicopter 11 Box 12 Light emitting body 13 Receiver 14 Lens 16 Window glass 17 Filter 19 Tube 27 Opening 26 Lower wall

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) G01S 7/48 B64D 47/00 G01C 3/06 G01S 17/00-17/88

Claims (2)

(57) [Claims] A light-emitting device and a light-receiving device are provided in a box, and light is emitted from the light-emitting device or the light-receiving device in the box.
A light-transmitting member that allows the light to be received and directed in the vertical direction
Are arranged so as to intersect these light beams, and a filter is provided below the light transmitting member in the box.
It is detachably arranged, and from the light emitter at a position spaced downward from the filter.
Has an aperture through which the light emitted or received by the receiver passes.
The member that forms the closed space below the filter is
Remotely mounted detachably below the luter
An altitude sensor for a pilot helicopter. 2. The remote-controlled helicopter according to claim 1, wherein the member forming the closed space is a cylinder provided substantially below the coaxial position with respect to each of the light emitter and the light receiver. Altitude sensor.