JP2548650B2 - Surface roughness measurement sensor mounting structure - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure for a surface roughness measuring sensor, and more particularly to a mounting structure for a surface roughness measuring sensor suitable for use in an environment such as concrete surface where dust is easily generated.

[0002]

2. Description of the Related Art Since a large amount of concrete is poured during the construction of dam concrete, it is necessary to remove the leitance from the surface of the concrete that was placed before and to ensure that the surface roughness is appropriate. The chipping process is performed so that Surface roughness is measured in order to check whether or not chipping is properly performed in such work, but this kind of measurement work has hitherto depended on visual qualitative judgment. In addition, in order to mechanize the measurement work, attempts have been made to measure the concrete surface using an ultrasonic sensor or a non-contact type sensor using laser light.

[0003]

However, the visual method has a drawback that stable and accurate evaluation cannot be performed depending on the skill of the measurer. In the case of a sensor using laser light, there is a problem that dust generated by the chipping work scatters the light, making it impossible to obtain proper measurement data. Moreover, since the surface of the measurement target has undulations, it is difficult to maintain a constant distance from the surface. Further, when the ultrasonic sensor is used, there is a problem that the sensor surface becomes dirty and cannot be detected as in the case of the laser beam. In any case, when the non-contact type sensor is used, there is a problem that the maintenance environment of the sensor becomes very difficult because the use environment is poor.

The present invention focuses on the above-mentioned conventional problems, and in the surface roughness measurement using a sensor, the height with respect to the surface portion to be measured is always constant without being affected by dust generation or the like. An object of the present invention is to provide a sensor mounting structure configured to accurately and quantitatively measure the surface roughness while maintaining the above.

[0005]

In order to achieve the above object, a mounting structure for a surface roughness measuring sensor according to the present invention comprises:
A sensor main body that is housed in a space inside the wheel and that transmits and receives electromagnetic waves for measuring surface roughness toward the wheel ground contact surface is attached to the wheel rotation support member.

[0006]

According to the above construction, since the sensor body is installed inside the wheel, it is installed in a space that is shielded from the environment of the measurement area, so that it is always placed in a good environment and is free from dust and dirt. In addition to being protected, it also becomes easier to protect from vibrations and collisions. Further, the sensor is always held at a constant height from the ground contact surface of the wheel, and even if there is undulation on the measurement surface, it is not affected by it, so the surface roughness can be measured accurately. is there. Since electromagnetic waves are used as waves, there is no problem in measuring the ground plane from inside the wheel.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A mounting structure for a surface roughness measuring sensor according to the present invention will be described below in detail with reference to the drawings.

1 and 2 are a sectional view and a side view of a sensor mounting structure according to an embodiment. In the sensor mounting structure according to this embodiment, the sensor body 10 is built in the idler wheel 12. The idler wheel 12 is provided with a rotation support shaft 14, and a pair of parallel disk-shaped bearing plates 16 are fixed to the rotation support shaft 14. A rotary ring 20 is attached to the outer peripheral surface of each of the bearing plates 16 via a bearing 18 so as to be freely rotatable on the outer periphery of the plate 16. An inner wheel 22 fixed across the pair of rotating rings 20.
The inner wheel 22 forms an internal space 24 between the outer peripheral portion of the rotary support shaft 14 and the bearing plate 16 which is isolated from the outside. A tire 26 is attached to the outer peripheral surface of the inner wheel 22, and the tire 26 is grounded on a running surface 28 so as to roll.

The idler wheel 12 is connected and supported by a vertical frame 30 such as a traveling trolley, and therefore, the inverted U-shaped bracket 32 covers the upper part of the idler wheel 12 first.
Is installed. The bracket side plate is the bearing plate 1
It is fixed to the outer surface of 6 by a fastening bolt 34. It is connected to the vertical frame 30 via the bracket 32, and this is provided by a parallel link mechanism 36 as shown in FIG. The parallel link mechanism 36 has an upper link 38 and a lower link 40 of the same length, one end of which is pin-connected to the vertical surface of the vertical frame 30 and the other end is bifurcated to rotate the lower link 40. Spindle 1
4 and the upper link 38 is connected to both side plates of the bracket 32 located vertically above the upper link 38. As a result, the idler wheel 12 allows the rotation support shaft 14 and the bearing plate 16 fixed thereto to move only in the vertical direction, and the wheel portion can freely rotate on the outer periphery of the bearing plate 16. The vertical frame 30 on the supporting side of the idler wheel 12 is provided with a fixing bracket 42 located above the upper link 38, and a reduction spring 44 is attached between this and the lower link 40, so that the idler wheel 12 is placed on the running surface 28. It is designed to be pressed with a predetermined ground pressure. The pressing spring 44 does not interfere with the upper link 38,
It is connected to the lower link 40 through a through hole 46 formed in the upper link 38.

In the idler wheel 12 having such a structure, the sensor body 10 for measuring surface roughness is provided in the inner space 24 surrounded by the bearing plate 16 and the inner wheel 22 at the outer periphery of the central portion of the rotary support shaft 14. It is attached. In this structure, a U-shaped mounting plate 48 is fixed to the inner surface of the bearing plate 16 on the lower side of the rotary support shaft 14, and the sensor body 10 is mounted on the lower surface of the plate 48. The sensor body 10 has the support shaft 14 so that the center line is aligned with a vertical line orthogonal to the axis of the rotation support shaft 14.
Is arranged directly below the central portion of the vehicle, and its transmitting / receiving surface 10A is attached so as to face the grounding portion of the idler wheel 12. Such a sensor body 10 has a built-in transmitting / receiving antenna,
An electromagnetic wave having a wavelength of 3 cm and a frequency of about 10 GHz is oscillated from an oscillator (not shown), and the tire 2 is transmitted from the transmitting / receiving surface 10A.
6 is emitted to the running surface 28 which is in contact with it, the reflected wave is received, the phase difference is detected, and the surface roughness of the running surface 28 is measured.

The measurement processing is performed on the side of the measuring instrument body installed outside the idler wheel 12. Therefore, an input / output path portion 50 such as a waveguide is connected to the top surface of the sensor body 10. This is bent and guided to the outside through the through hole 51 of the one bearing plate 16. The outer surface of the bracket 32 is provided to guide the cable guided to the outside.
As shown in FIG. 2, a guide plate 52 is attached to hold a cable connected to the input / output path portion 50,
For example, the vertical frame 30 is guided to a trolley or the like to which the vertical frame 30 is attached, and is connected to the mounted measuring instrument main body.

In the mounting structure of the surface roughness measuring sensor thus constructed, the bearing plate 16 integrated with the rotary support shaft 14 is fixed in the inner space 24 of the idler wheel 12, and the rotary support shaft 14 is parallel to the parallel link mechanism 36. Since the sensor body 10 is connected to the vertical frame 30 such as a trolley via the, the sensor body 10 can always maintain a vertical state with respect to the traveling surface 28. Since the inner space 24 of the idler wheel 12 is cut off from the outside, it is possible to measure the roughness of the concrete surface in an environment where dust is scattered immediately after the concrete is picked up, for example. is there. Therefore, while protecting the sensor body 10 from an external adverse environment (muddy water, etc.),
Concrete is effective from the vibration and impact generated by traveling on the roughened surface of the sensor body 1
0 can be protected.

Further, particularly in this embodiment, the sensor body 10
Since the vehicle can be run while keeping the height position of the vehicle constant, the measurement accuracy is high and the idle wheel 12 keeps the sensor height constant even if the running surface 28 has undulations. While moving up and down, the surface roughness can be measured with high accuracy and quantitatively.

[0014]

As described above, according to the present invention,
Since the sensor is housed inside the wheel and attached to its rotation support shaft, the sensor can be moved while keeping the distance to the traveling surface part constant while protecting the sensor from the external adverse environment. An excellent effect that automatic measurement processing can be performed with high measurement accuracy is obtained.

[Brief description of drawings]

FIG. 1 is a sectional view of a sensor mounting structure according to an embodiment.

FIG. 2 is a side view of FIG.

[Explanation of symbols]

 10 Sensor Main Body 12 Idling Wheel 14 Rotating Spindle 16 Bearing Plate 18 Bearing 20 Rotating Ring 22 Inner Wheel 24 Inner Space 26 Tire 28 Running Surface 30 Vertical Frame 32 Bracket 34 Fastening Bolt 36 Parallel Link Mechanism 38 Upper Link 40 Lower Link 42 Fixed Bracket 44 Compression Spring 46 Through Hole 48 Mounting Plate 50 Input / Output Path Section 51 Through Hole 52 Guide Plate

Front page continuation (72) Inventor Massei Konishi 3-1-1 Tam, Tamano-shi, Okayama Mitsui Engineering & Shipbuilding Co., Ltd. Tamano Works (72) Inventor Shinji Matsutani 1-25-1 Nishishinjuku, Shinjuku-ku, Tokyo Inside Taisei Corporation (72) Inventor Yoshikatsu Sako 1-25-1 Nishishinjuku, Shinjuku-ku, Tokyo Inside Taisei Corporation (72) Manabu Sawada 1-25-1 Nishi-Shinjuku, Shinjuku-ku, Tokyo In Taisei Corporation (72) Inventor Shoichi Ichihara 1-25-1 Nishishinjuku, Shinjuku-ku, Tokyo Inside Taisei Corporation (56) Reference JP-A-63-18211 (JP, A) Actual Kaihei 2-93708 (JP, U)

Claims (1)

(57) [Claims] 1. A surface roughness measuring sensor which is housed in a space inside a wheel and has a sensor main body attached to a wheel rotation supporting member for transmitting and receiving electromagnetic waves for measuring surface roughness toward the wheel grounding surface. Mounting structure.