JP7492624B1 - Underwater Measuring Instruments - Google Patents

Abstract

[Problem] To provide an underwater measuring device that can maintain an effective prevention effect of adhesion of living and non-living things for a long period of time. [Solution] The underwater measuring device 1 is provided with a detection unit 11 that is provided on a base 2b of a device body 2 that is immersed in water and performs detection related to the measurement, a sweeping unit 15 that is provided on the base 2b and sweeps and mechanically cleans the detection unit 11, and a UVC light irradiation unit 3 that irradiates UVC light toward the base 2b. [Selected Figure] Figure 2

Description

Article 30, paragraph 2 of the Patent Act applies. Announced at the Kyushu Product Technology Seminar by JFE Advantech Co., Ltd. Coastal and River Business Department held at Reference Ekimae Building (1-16-14 Hakata Ekimae, Hakata-ku, Fukuoka City, Fukuoka Prefecture) on November 30, 2022.

The present invention relates to underwater measuring equipment.

When underwater measuring equipment, including water quality measuring equipment that measures chlorophyll, turbidity, dissolved oxygen, salinity, etc. in water, is immersed in the ocean or rivers for an extended period of time, living organisms such as shellfish and inanimate objects such as mud and organic matter may adhere to the detection section within about a week, which may affect the measurement values.

Patent document 1 discloses a method for preventing biofouling by applying a substance that is chemically repulsive to living organisms.

Patent documents 2 and 3 disclose water quality measuring devices equipped with a sweeping device that mechanically removes living and non-living matter attached to the detection unit by sweeping it with a blade or brush.

In addition, it is known that exposure to deep ultraviolet (UVC) light can prevent biofouling.

Patent No. 7168278 Patent No. 3899352 Patent No. 6851343

However, when applying bio-repellent substances as disclosed in Patent Document 1, such substances affect the measurement value itself and therefore cannot be applied directly to the detection part, but must be applied around the detection part, so the effectiveness of preventing bio-adhesion is limited.

In the case of sweeping devices such as those disclosed in Patent Documents 2 and 3, because attachments within the sweeping range are mechanically removed, they are known to be highly effective at preventing fouling caused by attachment, regardless of whether the attachments are living or non-living. However, if living organisms attach to the drive parts, such as the blades, outside the sweeping range, abnormalities begin to occur in the operation of the sweeping device. In addition, living organisms can attach to the blades themselves, affecting the measured values, making it difficult to perform long-term measurements for more than one month.

On the other hand, when a UVC irradiation device is used in a water quality measuring instrument, biofouling is biologically prevented. However, compared to a sweeping device, there are disadvantages such as no anti-biofouling effect to begin with, and if the UVC light irradiation time is extended to achieve an anti-biofouling effect, the power consumption of the water quality measuring instrument increases, shortening the observation period when operating continuously with the built-in power supply. Furthermore, sufficient effect is not obtained in areas that are shaded by the irradiated light. If there are factors that attenuate light, such as turbidity in the measured water area, the UVC light will attenuate between the UVC irradiation device and the detection unit, reducing the anti-biofouling function. For this reason, UVC irradiation alone may not be effective enough to prevent adhesion.

As described above, it is difficult for conventional underwater measuring devices to effectively prevent the adhesion of living and non-living organisms over a long period of time.

The objective of the present invention is to provide an underwater measuring device that can effectively prevent adhesion of living and non-living things for a long period of time.

One aspect of the present invention provides an underwater measuring instrument comprising a detection unit provided on a base of an instrument body which is submerged in water and performs detection related to measurement, a sweeping unit provided on the base and which sweeps and mechanically cleans the detection unit, and a UVC light irradiating unit which irradiates UVC light toward the base , wherein the UVC light irradiating unit irradiates the UVC light toward the sweeping unit .

Living and non-living matter attached to the detection section is directly removed by sweeping with the sweeping section. Also, UVC light is irradiated from the UVC light irradiating section, preventing or suppressing adhesion of living matter to the sweeping section . The synergistic effect of the mechanical removal of living and non-living matter by the sweeping section and the prevention or suppression of adhesion of living matter by irradiation with UVC light can maintain effective prevention of adhesion of living and non-living matter for a long period of time.

Another aspect of the present invention provides an underwater measuring instrument comprising: a detection unit provided on a base of an instrument body that is submerged in water and performs detection related to measurement; a sweeping unit provided on the base and sweeping and mechanically cleaning the detection unit; a UVC light irradiation unit that irradiates UVC light toward the base; and a reflecting unit provided on the base and reflecting the UVC light irradiated from the UVC light irradiation unit, wherein the reflecting unit reflects the UVC light toward the sweeping unit.
Yet another aspect of the present invention provides an underwater measuring instrument comprising: a detection unit provided on a base of an instrument body to be submerged in water and performing detection related to measurement; a sweeping unit provided on the base and sweeping and mechanically cleaning the detection unit; a UVC light irradiating unit that irradiates UVC light toward the base; and a reflecting unit provided on the base and reflecting the UVC light irradiated from the UVC light irradiating unit, wherein the reflecting unit reflects the UVC light toward the UVC light irradiating unit.
The UVC light irradiating unit may also irradiate the UVC light toward the detection unit .

The UVC light irradiated from the UVC light irradiating unit also prevents or suppresses biofouling of the detection unit. In addition, the UVC light irradiated from the UVC light irradiating unit prevents or suppresses biofouling of the drive unit, so the period until the sweeping unit stops functioning due to biofouling can be extended.

The reflecting portion may reflect the UVC light toward a portion of the base portion that is not directly irradiated with the UVC light from the UVC light irradiating portion.

Since UVC light is irradiated from the UVC light irradiation section to the entire base, including areas that are not directly irradiated with UVC light, it is possible to more effectively prevent or suppress bioattachment to the base.

The reflecting section may reflect the UVC light irradiated from the UVC light irradiating section toward the UVC light irradiating section.

The UVC light emitted from the UVC light irradiating section and reflected by the reflecting section prevents or suppresses biofouling of the UVC light irradiating section, so the period until the UVC light irradiating section becomes inoperable due to biofouling can be extended.

The reflector may have at least one opening.

The opening allows the water flow to pass through, which can prevent or reduce the reflecting part from interfering with the water flow in the base.

The reflector may be arranged to at least partially surround the base.

The reflecting section protects the detection and sweeping sections from foreign objects that may flow along with the water current.

The underwater measuring device of the present invention can maintain effective prevention of biological and non-biological adhesion for a long period of time.

1 is a side view of a water quality measuring device according to a first embodiment of the present invention. FIG. 2 is a perspective view of the water quality measuring device of FIG. 1 as seen from below. FIG. 2 is a bottom view of the water quality measuring device of FIG. 1 . FIG. 2 is an enlarged perspective view of the water quality measuring device of FIG. 1 as viewed from below. FIG. 2 is an enlarged perspective view of the water quality measuring device of FIG. 1 as seen from below (with the reflector removed). FIG. 2 is a perspective view for explaining the direction of irradiation of UVC light by the underwater UVC light in the first embodiment. FIG. 4 is a perspective view of a reflector according to the first embodiment. 5A and 5B are perspective views of the reflector in the first embodiment as viewed from different directions. FIG. 4 is a diagram for explaining an irradiation area of UVC light in the first embodiment. FIG. 6 is a side view of a water quality measuring device according to a second embodiment of the present invention. FIG. 10 is a perspective view of the water quality measuring device of FIG. 9 as seen from below. FIG. 10 is a bottom view of the water quality measuring device of FIG. 9 . FIG. 10 is an enlarged perspective view of the water quality measuring device of FIG. 9 as viewed from below. FIG. 10 is an enlarged perspective view of the water quality measuring device of FIG. 9 as viewed from below (with the reflector removed). FIG. 11 is a perspective view for explaining the direction of irradiation of UVC light by the underwater UVC light in the second embodiment. FIG. 11 is a perspective view of a reflector according to a second embodiment. FIG. 11 is a perspective view of a reflector in a second embodiment, seen from a different direction. FIG. 11 is a diagram for explaining an irradiation area of UVC light in the second embodiment. FIG. 11 is a side view of a water quality measuring device according to a third embodiment of the present invention. FIG. 18 is a perspective view of the water quality measuring device of FIG. 17 as viewed from below. 18 is a bottom view of the water quality measuring device of FIG. 17 . FIG. 18 is an enlarged perspective view of the water quality measuring device of FIG. 17 as viewed from below. FIG. 18 is an enlarged perspective view of the water quality measuring device of FIG. 17 as viewed from below (with the reflector removed). FIG. 13 is a perspective view of a reflector according to a third embodiment. FIG. 11 is a perspective view of the reflector in the third embodiment, as viewed from a different direction. FIG. 23 is a cross-sectional view taken along line XXIII-XXIII in FIG. 21 . FIG. 13 is a diagram for explaining an irradiation area of UVC light in the third embodiment.

Next, an embodiment of the present invention will be described in detail with reference to the attached drawings.

First Embodiment
1 and 2, a water quality measuring device (underwater measuring device) 1 according to a first embodiment of the present invention includes a device main body 2 and an underwater UVC light (UVC light irradiator) 3. The water quality measuring device 1 is used by being placed in water such as the ocean or a river. For example, the water quality measuring device 1 is suspended in the sea from a buoy (not shown) moored on the ocean.

The waterproof casing 2a of the device body 2 contains a power source, a data converter that converts signals from sensors (described later), a storage device that stores the converted data, and other components (none of which are shown). A base 2b with a circular end face is provided at the bottom end of the waterproof casing 2a.

The underwater UVC light 3 comprises a light body 3b with a UVC light exit window (see FIG. 6) 3a at its tip, an attachment part 3c, and a power supply cable 3d. The attachment part 3c is attached to the lower end of a support rod 4 so that the angle can be adjusted. The support rod 4 is attached to the waterproof casing 2a of the device body 2 by two clamp fittings 5A, 5B. The power supply cable 3d extends to the aforementioned buoy, and power is supplied from the buoy to the underwater UVC light 3 via the power supply cable 3d. The underwater UV light 3 irradiates UVC light toward the end face of the base part 2b. The direction of irradiation of UVC light by the underwater UVC light 3 and the irradiation area will be described later.

Referring to Figures 2 to 6, the base portion 2b of the device body 2 is provided with a sensor unit (detection portion) 11, a thermistor-type water temperature sensor 12, and a wiper (sweeping portion) 15.

In this embodiment, the sensor unit 11 is equipped with a fluorescence measurement type chlorophyll sensor 13, whose measured values are easily affected by the attachment of living and non-living things, and an infrared light scattering type turbidity sensor 14.

The wiper 15 includes an arm 15a and a blade 15b attached to the arm 15a. The base end of the arm 15a is detachably fixed to a drive shaft (drive unit) 15c shown only in FIG. 6. The drive shaft 15c is rotated back and forth within a certain angle range by a drive mechanism (not shown) including an electric motor housed in the waterproof casing 2a. As a result, the arm 15a repeats a reciprocating swing motion within the range indicated by the symbol Rw in FIG. 3. The range Rw of this reciprocating swing motion includes the sensor unit 11 and its surrounding base portion 2b. Therefore, the sensor unit 11 and its surrounding base portion 2b are swept away by the blade 15b of the wiper 15 and mechanically cleaned. While the water quality measuring device 1 is used in water, the wiper 15 may operate constantly or intermittently.

In this embodiment, the underwater UVC light 3 is disposed close to the base 2b so that the tip of the light body 3b faces the end face of the base 2b slightly. As conceptually shown by the arrow ID in FIG. 6, in this embodiment, the underwater UVC light 3 is set to irradiate UVC light toward the drive shaft 15c of the wiper 15. While the water quality measuring device 1 is used in water, the underwater UVC light 3 may irradiate UVC light constantly or intermittently. Since the wiper 15 mechanically removes the adhesion, the adhesion prevention effect can be maintained while reducing the amount of irradiation compared to when biofouling is prevented by UVC light alone, and the power consumption of the water quality measuring device 1 can be kept low, and the observation period when operating with a built-in power source can be extended.

Referring to Figures 7A and 7B together, the water quality measuring device 1 is equipped with a reflector 21 for reflecting the UVC light emitted from the UVC light 3.

The reflector 21 in this embodiment has a shape in which a metal plate of a constant width is curved into an arc shape as a whole, and is provided so as to surround the base part 2b, which has a circular end face as described above, in a cylindrical shape, except for the part where the tip of the light body 3b of the underwater UVC light 3 faces the base part 2b. On the base end 21a side of the reflector 21, three tab-shaped parts 21c with holes 21b formed therein are cut and raised, and these tab-shaped parts 21c are screwed to the base part 2b. The tip 21d of the reflector 21 is located away from the end face of the base part 2b. In addition, on the side of the reflector 21 opposite the light body 3b of the underwater UVC light 3 with respect to the wiper 15, an inclined part 21e is provided in which the tip 21d is partially inclined inward. Furthermore, three elongated slits (openings) 21f are provided on the base end 21a side of the reflector 21. The ratio (opening ratio) of the total area of the slits 21f to the total area of the inner surface of the reflector 21 is set to, for example, more than 0% and not more than 60%.

Referring to FIG. 8, if the reflector 21 were not present, the area of the end face of the base portion 2b onto which UVC light is irradiated from the underwater UVC light 3 would be limited to the area IA1 hatched with dashed lines. However, a portion of the UVC light from the underwater UVC light 3 is reflected by the reflector 21 and irradiated to the remaining areas IA2 and IA3 other than the area IA1 on the end face of the base portion 2b, so that the entire end face of the base portion 2b is irradiated with UVC light. In particular, the area IA3 is in the shadow of the arm 15a and blade 15b of the wiper 15, so that the UVC light from the underwater UVC light 3 is not directly irradiated. However, the UVC light from the underwater UVC light 3 is reflected by the reflector 21, so that the UVC light is also irradiated to the area IA3. In this embodiment, the base 2b is made of metal, so the UVC light from the underwater UVC light 3 is reflected not only by the reflector 21 but also by the end surface of the base 2b, which allows the UVC light to be effectively irradiated to areas that are shaded by the arm 15a and blade 15b of the wiper 15.

Referring to FIG. 4, a portion of the UVC light from the underwater UV light 3 is irradiated onto the inner surface of the inclined portion 21e provided at the tip 21d of the reflector 21. A portion of the light reflected by the inner surface of the inclined portion 21e is irradiated onto area IA4 in FIG. 4, that is, the portion of the light body 3b of the underwater UVC light 3 that includes the UVC light window 3a. In this way, the irradiation of UVC light irradiated from the underwater UVC light 3 and reflected by the reflector 21 prevents or suppresses biological adhesion to the underwater UVC light 3, so that the period until the underwater UVC light 3 stops functioning due to biological adhesion can be extended.

The water quality measuring device 1 according to this embodiment has the following features:

Living and non-living matter attached to the sensor unit 11 is directly removed by sweeping with the wiper 15. In addition, UVC light is irradiated from the underwater UVC light 3, preventing or suppressing adhesion of living matter to the base portion 2b, including the portion where the sensor unit 11 and the water temperature sensor 12 are provided. The synergistic effect of the mechanical removal of living and non-living matter by the wiper 15 and the prevention or suppression of adhesion of living matter by irradiation of UVC light by the underwater UVC light 3 makes it possible to maintain effective prevention of adhesion of living and non-living matter over a long period of time.

As described above, the UVC light from the underwater UVC light 3 is irradiated toward the drive shaft 15c of the wiper 15. This prevents or suppresses biofouling of the drive shaft 15c of the wiper 15, thereby extending the period until the wiper 15 stops functioning due to biofouling.

The UVC light from the underwater UVC light 3 is reflected by the inner surface of the inclined portion 21e of the reflector 21 and is irradiated onto a portion of the light body 3b of the underwater UVC light 3, including the UVC light window 3a. Therefore, biofouling of the underwater UVC light 3 is prevented or suppressed , and the period until the underwater UVC light 3 becomes inoperable due to biofouling can be extended.

The UVC light from the underwater UVC light 3 is also reflected by the reflector 21 and irradiated onto the base 2b. In particular, UVC light is also irradiated onto the area IA3 that is in the shadow of the wiper 15 and is not directly irradiated with UVC light from the underwater UVC light 3, so that biofouling on the base 2b can be more effectively prevented or suppressed.

The reflector 21 has slits 21f, which allow the water flow to pass through, thereby preventing or mitigating the reflector 21 from obstructing the water flow in the base 2b. By setting the aperture ratio of the reflector 21 to a range greater than 0% and less than or equal to 60%, as described above, it is possible to effectively prevent or mitigate the reflector 21 from obstructing the water flow while maintaining the inherent function of the reflector 21, which is to reflect UVC light.

As mentioned above, the reflector 21 is arranged to surround the end face of the base portion 2b, so that the sensor unit 11, the water temperature sensor 12, and the wiper 15 are protected by the reflector 21 from foreign objects that flow with the water current.

The second and third embodiments of the present invention will be described below. In the following description, points that are not specifically mentioned are the same as those in the first embodiment. In addition, in the drawings referred to in the second and third embodiments, elements that are the same or similar to those in the first embodiment are given the same reference numerals.

Second Embodiment
9 to 16 show a water quality measuring device 1 according to a second embodiment of the present invention.

Referring to Figures 9 and 10, in this embodiment, the support rod 4 of the underwater UVC light 3 is attached to the waterproof casing 2a of the device body 2 by one clamp fitting 5.

Referring to Figures 10 to 13, the underwater UVC light 3 is positioned farther away from the base 2b of the device body 2 than in the first embodiment, and a gap is provided between it and the tip 32d of the reflector 32, in order to widen the irradiation range of the UVC light.

Continuing to refer to Figures 10 to 13, the base portion 2b of the device body 2 is provided with an optical dissolved oxygen sensor 31, a water temperature sensor 12, and a wiper 15.

As conceptually shown by the arrow ID in FIG. 14, in this embodiment, the direction of UVC light irradiation from the underwater UVC light 3 is set so that the UVC light is generally directed toward the dissolved oxygen sensor 31.

Referring to Figs. 9 to 12 as well as Figs. 15A and 15B, the reflector 32 is cylindrical and made of a metal plate of a constant width, and is provided so as to surround the entire circumference of the base portion 2b, whose end face is circular. Three tab-shaped portions 32c with holes 32b are cut and raised on the base end 32a side of the reflector 32, and these tab-shaped portions 32c are screwed to the base portion 2b. The tip 32d of the reflector 32 is located away from the end face of the base portion 2b. In addition, the tip 32d of the reflector 32 is folded back outward to provide an annular portion 32e. Furthermore, three elongated slits 32g are provided on the base end 32a side of the reflector 32.

Referring to FIG. 16, if the reflector 32 were not present, the area of the end face of the base 2b onto which UVC light is irradiated from the underwater UVC light 3 would be limited to the area IA21 hatched with dashed lines. However, part of the UVC light from the underwater UVC light 3 is reflected by the reflector 32 and irradiated to area IA22, which is in the shadow of the arm 15a and blade 15b of the wiper 15 and is not directly irradiated with UVC light from the underwater UVC light 3, so that the entire end face of the base 2b is irradiated with UVC light.

Referring to FIG. 12, a portion of the UVC light from the underwater UVC light 3 is irradiated to area IA23 in the figure, that is, the outer surface of the annular portion 32e of the reflector 32. A portion of the reflected light reflected by the outer surface of the annular portion 32e is irradiated to area IA24 in the figure, that is, the portion of the light body 3b of the underwater UVC light 3 that includes the UVC light window 3a. In this way, the irradiation of UVC light irradiated from the underwater UVC light 3 and reflected by the reflector 32 prevents or suppresses biological attachment to the underwater UVC light 3, so the period until the underwater UVC light 3 stops functioning due to biological attachment can be extended.

Third Embodiment
17 to 24 show a water quality measuring device 1 according to a third embodiment of the present invention.

Referring to Figures 17 and 18, the water quality measuring device 1 of this embodiment is equipped with two underwater UVC lights 51, 52. Each underwater UVC light 51, 52 is equipped with a light body 51b, 52b having a UVC light exit window 51a, 52a at its tip, a mounting portion 51c, 52c, and a power supply cable 51d, 52d. A support rod 53 with the underwater UVC light 51 attached to its lower end is attached to the waterproof casing 2a of the device body 2 by two clamp fittings 54A, 54B. In addition, a support rod 55 with the underwater UVC 52 attached to its lower end is attached to the waterproof casing 2a by two tie wraps 56A, 56B.

Referring to Figures 18 to 21 and 23, the underwater UVC light 51 is positioned to the side of the base 2b of the device body 2 with a gap therebetween. The underwater UVC light 52 is positioned directly opposite the end face of the base 2b with a gap between it and the tip 63d of the reflector 63.

Continuing with reference to Figures 18 to 21 and 23, the base portion 2b of the device body 2 is provided with an electrical conductivity sensor 61 for measuring salinity, a water temperature sensor 12, and a wiper 62.

Referring to FIG. 23, the electrical conductivity sensor 61 has a cylindrical body 61a composed of multiple insulating cylinders and multiple ring-shaped electrodes (neither shown).

The wiper 62 is equipped with a drive shaft 62a that can move back and forth within the cylindrical body 61a, and a blade 62b attached to the tip of the drive shaft 62a. The drive shaft 62a is repeatedly moved back and forth in a linear motion by a drive mechanism (not shown) including an electric motor housed in the waterproof casing 2a. As a result, the blade 62b sweeps and mechanically cleans the inner wall surface of the cylindrical body 61a.

As conceptually shown by the arrow ID1 in FIG. 21, the direction of irradiation of the underwater UVC light 51 is set so that the UVC light is irradiated toward the drive shaft 62a (shown in FIG. 23) of the wiper 62. As conceptually shown by the arrow ID2, the direction of irradiation of the underwater UVC light 52 is set so that the UVC light is irradiated toward the inside of the cylindrical body 61a of the electrical conductivity sensor 61.

Referring to Figs. 18 to 21 as well as Figs. 22A and 22B, the reflector 63 is cylindrical and made of a metal plate, and is provided so as to surround the entire circumference of the base part 2b, the end face of which is circular. On the base end 63a side of the reflector 63, three tab-shaped parts 63c with holes 63b are cut and raised, and these tab-shaped parts 63c are screwed to the base part 2b. The tip 63d of the reflector 63 is located away from the end face of the base part 2b. In addition, on the tip 63d of the reflector 63, cut and raised pieces 63f each having an outwardly folded arc-shaped part 63e are provided at intervals from each other. Furthermore, on the base end 63a side of the reflector 63, a plurality of punched parts (openings) 63g having an area larger than the slits 21f and 32b of the reflectors 21 and 32 of the first and second embodiments are provided. Furthermore, a window 63h is provided on the base end 63a side of the reflector 63 to allow the UVC light from the underwater UVC light 51 to pass through. Light collecting plates 63i are provided on both sides of the window 63h by cutting and raising.

Referring to FIG. 24, if the reflector 63 were not present, the area of the end face of the base 2b onto which UVC light is irradiated from the underwater UVC lights 51, 52 would be limited to the area IA31 hatched with dashed lines. However, part of the UVC light from the underwater UVC lights 51, 52 is reflected by the reflector 63 and irradiated onto the area IA32 which is in the shadow of the electrical conductivity sensor 61 and is not directly irradiated with UVC light from the underwater UVC light 3, so that the entire end face of the base 2b is irradiated with UVC light.

Referring to FIG. 20, a portion of the UVC light from the underwater UVC light 52 is irradiated to area IA33 in the figure, that is, the outer surface of the arc-shaped portion 63e of the reflector 63. A portion of the reflected light reflected by the outer surface of the arc-shaped portion 63e is irradiated to area IA34 in the figure, that is, the portion of the light body 52b of the underwater UVC light 52 that includes the UVC light emission window 52a. In this way, the irradiation of UVC light irradiated from the underwater UVC light 52 and reflected by the reflector 63 prevents or suppresses biological attachment to the underwater UVC light 52, so that the period until the underwater UVC light 52 stops functioning due to biological attachment can be extended.

Referring to FIG. 18, a portion of the UVC light from the underwater UVC light 51 is irradiated to area IA35 in the figure, that is, the outer surface of the light collector 63i. A portion of the reflected light reflected by the outer surface of the light collector 63i is irradiated to area IA36 in the figure, that is, the portion of the light body 51b of the underwater UVC light 51 that includes the UVC light exit window 51a. In this way, the irradiation of UVC light irradiated from the underwater UVC light 51 and reflected by the light collector 63i prevents or suppresses biological attachment to the underwater UVC light 51, so that the period until the underwater UVC light 51 stops functioning due to biological attachment can be extended.

1. Water quality measuring equipment (underwater measuring equipment)
2 Device body 2a Waterproof casing 2b Base 3 Underwater UVC light (UVC light irradiation part)
3a UVC light exit window 3b Light body 3c Mounting part 3d Power supply cable 4 Support rod 5, 5A, 5B Clamp metal fitting 11 Sensor unit (detection part)
12 Water temperature sensor 13 Chlorophyll sensor 14 Turbidity sensor 15 Wiper (sweeping part)
15a Arm 15b Blade 15c Drive shaft 21 Reflector (reflector)
21a: base end; 21b: hole; 21c: tab-shaped portion; 21d: tip; 21e: inclined portion; 21f: slit (opening)
31 Dissolved oxygen sensor (detection unit)
32 Reflector (reflecting part)
32a: base end; 32b: hole; 32c: tab-shaped portion; 32d: tip; 32e: annular portion; 32g: slit (opening)
51, 52 Underwater UVC light (UVC light irradiation part)
51a, 52a UVC light exit window 51b, 52b Light body 51c, 52c Mounting section 51d, 52d Power supply cable 53, 55 Support rod 54A, 54B Clamp metal fitting 56A, 56B Tie wrap 61 Electrical conductivity sensor (detection section)
61a Cylindrical body 62 Wiper 62a Rod 62b Blade 63 Reflector (reflector)
63a Base end 63b Hole 63c Tab-shaped portion 63d Tip 63e Arc-shaped portion 63f Cut-out piece 63g Punched portion 63h Window portion 63i Light collecting plate

Claims (8)

A detection unit that is provided on a base of the device body that is immersed in water and performs detection related to measurement;
a cleaning unit provided on the base unit and configured to mechanically clean the detection unit by sweeping the detection unit;
a UVC light irradiation unit that irradiates UVC light toward the base unit ,
The UVC light irradiating unit irradiates the UVC light toward the sweeping unit, the underwater measuring device. A detection unit that is provided on a base of the device body that is immersed in water and performs detection related to measurement;
a cleaning unit provided on the base unit and configured to mechanically clean the detection unit by sweeping the detection unit;
a UVC light irradiation unit that irradiates UVC light toward the base;
a reflecting portion provided on the base portion and configured to reflect the UVC light irradiated from the UVC light irradiating portion;
Equipped with
The reflecting portion reflects the UVC light toward the sweeping portion. A detection unit that is provided on a base of the device body that is immersed in water and performs detection related to measurement;
a cleaning unit provided on the base unit and configured to mechanically clean the detection unit by sweeping the detection unit;
a UVC light irradiation unit that irradiates UVC light toward the base;
a reflecting portion provided on the base portion and configured to reflect the UVC light irradiated from the UVC light irradiating portion;
Equipped with
The underwater measurement device, wherein the reflecting unit reflects the UVC light toward the UVC light irradiating unit. The underwater measuring device according to claim 1 , wherein the UVC light irradiating unit also irradiates the UVC light toward the detecting unit . The underwater measuring device according to claim 2 , wherein the reflecting portion reflects the UVC light toward a portion of the base that is not directly irradiated with the UVC light from the UVC light irradiating portion. The underwater measuring device according to claim 2 , wherein the reflecting section also reflects the UVC light irradiated from the UVC light irradiating section toward the UVC light irradiating section. 4. The underwater measuring instrument according to claim 2, wherein the reflecting portion is provided with at least one opening. The underwater measuring instrument according to claim 2 or 3 , wherein the reflecting portion is provided so as to at least partially surround the base portion.

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