JP2015105855A - Underwater detection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an underwater detection device which is used underwater and which can surely detect foreign bodies such as glass pieces, metal pieces, and sediment on a bottom face of a water-filled pool without oversight when such foreign bodies exist there.SOLUTION: Light emission means 5 for emitting laser slit light 25, which linearly irradiates a bottom face 3 of a water-filled pool, is provided in the water of the pool. Foreign bodies 9 on the bottom face 3 in the water of the pool are detected by detecting the turbulence of a ray of the slit light 25 applied to the bottom face 3 of the pool by the light emission means 5.

Description

  The present invention relates to an underwater detection device for underwater use that can be reliably detected without being overlooked when a foreign object such as a glass piece, a metal piece, or earth and sand is present on the bottom surface of a pool containing water.

  When there is a foreign object on the bottom surface of the swimming pool, it was sometimes overlooked because it was discovered by human eyes.

  The invention of Japanese Patent Application Laid-Open No. 05-187834, “Patent Document 1”, discloses that the reflected light from the object to be measured can be measured even when the light color of the laser slit light changes. A plurality of filters having different light wave transmission regions are arranged in series so that reflected light of only a predetermined wavelength region can be incident on the light receiving means.

Japanese Patent Laid-Open No. 06-86866, “Welding robot with copying function” in Japanese Patent Application Laid-Open No. 2002-86866 employs an imaging means and a control means including a laser slit light device and a CCD camera without using an arc sensor. A configuration of a welding robot having a function is disclosed.

Japanese Patent Laid-Open No. 05-187834 Japanese Utility Model Publication No. 06-86866

  If there is a solid foreign object such as a piece of metal or glass on the underwater bottom of the swimming pool, the discovery is due to human observation, so it is dark and difficult to see, or if the foreign object is translucent and difficult to see. Was sometimes overlooked. This solid foreign object, if discovered late or missed, could cause injury and other injuries to the limbs of pool users.

  The invention of the “shape measuring device” of Patent Document 1 is a device that measures the shape of a welded part, but does not detect foreign matter at the bottom of the water.

  The idea of the “welding robot with a copying function” in Patent Document 2 determines the state of the welding arc and moves the welding torch by copying, but does not detect the foreign matter at the bottom of the water.

The present invention has been made in view of the above-mentioned problems of the prior art, and the object is to have a foreign object such as a glass piece, a metal piece, or earth and sand on the bottom surface of a pool containing water. Another object of the present invention is to provide an underwater detection device for underwater use that can be surely discovered without being overlooked.

  The underwater detection device according to the invention of claim 1 is provided with a laser slit light emitting means for linearly irradiating the bottom surface of the pool containing water in the pool water, and the slit irradiated on the pool bottom surface by the light emitting means. It is characterized by detecting the disturbance of light rays and detecting foreign matter present on the bottom surface of the pool water.

In addition to the light emitting means according to claim 1, the underwater detection apparatus according to the invention of claim 2 further includes a light receiving means having a CCD camera that scans the slit light irradiated by the light emitting means and images the scanning area. A moving means for sequentially moving the irradiation area of the bottom surface of the pool by the light emitting means and the CCD camera is provided in the pool water, and a device control unit for operating and controlling the light emitting means, the light receiving means and the moving means, and the CCD An image processing control unit for foreign matter existing on the bottom surface of a pool photographed by a camera, and a position detection unit for specifying the position coordinates of the foreign matter are provided.

  The underwater detection device according to the invention of claim 1 is provided with a laser slit light emitting means for linearly irradiating the bottom surface of the pool containing water in the pool water, and the slit irradiated on the pool bottom surface by the light emitting means. Because it detects the disturbance of light rays and detects foreign objects existing on the bottom surface of the pool water, it prevents the presence of foreign objects such as glass pieces and metal pieces that are difficult to see with the naked eye on the bottom surface of pools containing water. Because it can detect the disturbance caused by the refraction of the laser slit light, it will surely detect and remove foreign objects that are difficult to see with the naked eye, and it will cause a sense of incongruity and danger to the user's limbs in the pool. And can maintain cleanliness and safety.

In addition to the light emitting means according to claim 1, the underwater detection apparatus according to the invention of claim 2 further includes a light receiving means having a CCD camera that scans the slit light irradiated by the light emitting means and images the scanning area. A moving means for sequentially moving the irradiation area of the bottom surface of the pool by the light emitting means and the CCD camera is provided in the pool water, and a device control unit for operating and controlling the light emitting means, the light receiving means and the moving means, and the CCD Since the image processing control unit for the foreign matter existing on the bottom surface of the pool photographed by the camera and the position detection unit for specifying the position coordinates of the foreign matter are provided, it is not visible to the naked eye present on the bottom surface of the pool containing water. Difficult foreign objects such as glass pieces and metal pieces can be reliably detected and the position can be specified and recorded.

It is explanatory drawing which shows the condition which irradiates a laser slit light in the embodiment example of the underwater detection apparatus which concerns on this invention. It is explanatory drawing which expands and shows the A section of FIG. It is explanatory drawing which shows the example of embodiment of the underwater detection apparatus which concerns on this invention. It is a block diagram which shows the function of a foreign material detection. It is a flowchart which shows operation of a foreign material detection. This is a specific coordinate of the foreign object position. It is a flowchart which shows the corresponding | compatible work after a foreign material detection.

  An embodiment of an underwater detection device according to the present invention will be described with reference to FIGS. The present invention is not limited only to the following embodiments. It goes without saying that changes (for example, omission or addition of components, change of shape of components, etc.) can be added to the following embodiments without departing from the gist of the present invention. In addition, the figure shows the outline, only a part is drawn and the detailed structure is omitted.

FIG. 1 shows a first embodiment of the underwater detection apparatus according to the present invention, wherein a linear laser slit light 25 is emitted from a light emitting means 5 in the pool water, and the light receiving means 6 in the pool water is within the light receiving photographing area 26. The situation where the reflected light of the laser slit light 25 is received is shown.
The bottom surface 3 in the pool water is scanned with the linear laser slit light 25 irradiated by the light emitting means 5.
The laser slit light 25 scans a square range in the figure as indicated by an arrow L.
The disturbance of the light beam of the laser slit light 25 reflected from the light receiving photographing area 26 is detected by the light receiving means 6 in water, and the foreign matter 9 existing on the bottom surface 3 of the pool is confirmed.

FIG. 2 is an explanatory diagram showing the A portion of FIG. 1 in an enlarged manner.
The laser slit light 25 is a thin linear strip light beam having a width of several millimeters. By scanning as indicated by an arrow L, the portion of the foreign matter 9 such as a glass piece or a metal piece irradiated to the laser slit light 25 is a linear strip shape. Are refracted to become a scattered light 25A.

The almost transparent foreign matter 9 such as a glass piece or a plastic piece that is hardly visible in the pool water is disturbed at the interface due to the refraction phenomenon of the laser slit light 25. Therefore, by detecting the scattered light 25A, Authentication is ensured.
Further, hard-to-see solid foreign matters 9 such as metal pieces, pebbles, earth and sand can be authenticated by the laser slit light 25 being divided.
As described above, since the foreign matter 9 that is difficult to see with the naked eye can be reliably detected by the scattered light 25A that disturbs the laser slit light 25, no oversight occurs.
Therefore, cleanness and safety can be maintained without causing a sense of incongruity or danger to the user's limbs or the like by surely carrying out the discovery and removal of foreign matters as appropriate when the pool is used.

FIG. 3 is an explanatory view showing an embodiment of the underwater detection device according to the present invention.
1 is a swimming pool containing water, 2 is a side wall, and 3 is a bottom surface.
4 is an underwater detection device used in the pool water, and is installed on the bottom surface 3 of the pool.
The underwater detection device 4 includes a light emitting unit 5 that linearly illuminates the bottom surface 3, a light receiving unit 6 that has a CCD camera that captures the entire irradiation area irradiated by the light emitting unit 5, and the bottom surface 3 of the pool 1. The moving means 7 to move is provided.
In addition, a transmitter / receiver 8 compatible with a remote controller / radio control is provided, and a signal for operating and controlling the light emitting means 5, the light receiving means 6 and the moving means 7 by the transmitter / receiver 8 is sent to a device control unit (not shown) outside the pool. Send and receive to and from. The transmitter / receiver 8 may be equipped with Patlite (registered trademark) or a warning sound so that the inspector is notified of the detection of the foreign matter, and the foreign matter can be immediately removed.

  A light emitting irradiation device 15 emits a linear laser slit light 25 from the light emitting means 5, scans a square range in the figure as an arrow L, and moves by the moving means 7. Reference numeral 16 denotes a light-receiving photographing device (with a CCD camera). The light-receiving means 6 photographs the laser slit light 25 in the light-receiving photographing region 26 with the CCD camera. Reference numeral 17 denotes a moving device that moves the underwater detection device 4 in the (xy) direction on the pool bottom surface 3 in cooperation with the moving means 7 and the transceiver 8.

  By using the underwater detection device 4 to move while scanning the bottom surface 3 of the pool 1 underwater, it is possible to reliably remove foreign matters 9 such as glass pieces, plastic pieces, metal pieces, pebbles, earth and sand, etc., which are present on the top surface of the sheet bottom surface 3 Can be detected.

FIG. 4 is a block diagram illustrating a foreign object detection function.
The underwater detection device 4 is formed by a light emitting means 5, a light receiving means 6, a moving means 7, and the like.
The device control unit 10 operates and controls the light emitting means 5, the light receiving means 6, and the moving means 7 of the underwater detection device 4.
The image processing control unit 11 controls data processing such as the shape and size of a foreign object photographed by the CCD camera of the light receiving means 6.
The position detection unit 12 specifies the position coordinates of the foreign matter on the upper surface of the pool bottom surface.
Based on the foreign matter detection data, a countermeasure for removing foreign matter existing on the bottom surface of the pool is performed.

FIG. 5 is a flowchart showing an operation of detecting a foreign object on the pool bottom surface in the pool water.
According to the following steps, a laser slit light is applied to the bottom surface of the pool in the pool water, the presence or absence of foreign matter that is difficult to detect with human eyes due to the disturbance of the reflected light is verified, and the position is specified.
Step 1: Laser slit light is emitted, and the surface of the pool is irradiated and scanned.
Step 2: The presence or absence of foreign matter on the bottom surface is verified by reflected light from the irradiation range.
Step 3: Move the underwater detection device over the bottom of the pool.
Step 4: The light emission, light reception, scanning and movement in Steps 1 to 3 are controlled by remote operation.
Step 5: Process and control the image / data.
Step 6: Specify the position coordinates of the foreign matter on the bottom of the pool.

FIG. 6 shows the position coordinates of the foreign matter, and specifies the position of the upper surface of the pool bottom surface where the foreign matter exists.
The positions of foreign matter A, foreign matter B,... On the plane coordinates of the X axis (a, b, c,...) And the Y axis (1, 2, 3,. Plot.

FIG. 7 is a flowchart showing the foreign object detection / removal operation. The position of the foreign object in the pool water is specified according to the following operation procedure, and the removal operation is performed.
Work procedure 1: The position coordinates of the foreign matter are specified by the underwater detection device.
Work procedure 2: The position coordinates of the foreign matter are made to correspond to the pool bottom surface.
Work procedure 3: Remove foreign matter at the bottom of the pool.

The underwater detection device can be applied to a water storage tank or a liquid storage tank in which foreign matter such as dust is mixed and accumulated in addition to a swimming pool.

1 pool
2 side walls
3 bottom
4 Underwater detector
5 light emitting means
6 light receiving means
7 moving means
8 transceivers
9 foreign objects

15 light emitting device
16 light receiving device
17 mobile device

25 laser slit light
26 light receiving area

Claims (2)

  Laser slit light emitting means for linearly irradiating the bottom surface of the pool containing water is provided in the pool water, and the disturbance of the light beam of the slit light irradiated on the pool bottom surface is detected by the light emitting means to An underwater detection device that detects foreign matter existing on a bottom surface. In addition to the light emitting means according to claim 1, the light receiving means having a CCD camera for scanning the slit light irradiated by the light emitting means to photograph the scanning area, and the bottom surface of the pool by the light emitting means and the CCD camera. A moving means for sequentially moving the irradiation area is provided in the pool water, and further exists on the bottom surface of the pool photographed by the CCD camera, and a device control section for operating and controlling the light emitting means, the light receiving means, and the moving means. The underwater detection apparatus according to claim 1, further comprising a foreign matter image processing control unit and a position detection unit that specifies position coordinates of the foreign matter.

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