JPH0731173Y2 - Underwater sensor mounting device - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of an underwater sensor mounting device for mounting a water quality sensor for observing the water quality of the ocean or a reservoir, for example, a PH sensor, a water temperature sensor, a salt concentration sensor, a DO sensor, etc. at a predetermined water depth. .

[0002]

2. Description of the Related Art Conventionally, there are a method in which a sensor is directly clamped to a mooring cable of a floating body as shown in FIG. 4 and a method in which another cable is provided and a sensor is clamped to this cable as shown in FIG.

[0003]

When the sensor is attached to the mooring line of the floating body as it is, the motion of the mooring line is directly transmitted to the sensor cable, which may cause disconnection. Further, the mooring line is inclined due to the water flow, and the depth of the sensor position is changed so that the predetermined water depth is not obtained. Further, when the sensor cable is separately provided as shown in FIG. 5, there is a possibility that the sensor cable and the mooring cable may come close to each other due to a tide, a commutation, a wave and the like, and the sensor cable may be broken.

[0004]

In order to solve the above problems, the present invention is to install a sensor at a predetermined water depth position of a sensor holding device such as a rope or a steel bar hanging from a floating body and mooring the floating body and an intermediate float. The floating body and the underwater intermediate float are connected to each other at a fixed distance, and the mooring line mooring the intermediate float is set down by a mooring rope up to near the bottom of the water, and below that to the bottom of the water and up to the sinker with a mooring chain that is a mooring chain. It is an underwater sensor mounting device connected to a weight.

[0005]

With the above construction, the sensor holding device is hung from the floating body regardless of the mooring line, and the sensor holding device and the mooring line are kept at a constant interval even when the tide stops without water flow. The rope, the intermediate float and the mooring rod approach the catenary curve, and the sensor holding device does not get caught in the mooring rope.

At the time of commutation in which the tide changes, the floating body and the sensor holding device slowly move along the flow around the intermediate float with the mooring rod as a radius to the downstream of the intermediate float, and then pull the mooring chain, as shown in FIG. Therefore, there is no possibility that the sensor holding device always keeps a certain distance from the mooring line.

Further, when there is a wave, the molecular motion of water due to the wave makes a circular motion in the surface layer which is equal to the height of the wave. However, since the radius becomes smaller at a deeper position, the sensor holding device becomes deeper at a deeper position. There is little upset by. Therefore, if the mooring rod having an appropriate length is used, there is no risk that the sensor holding device will be entangled in the mooring line due to waves and there will be no risk of disconnection of the sensor cable.

[0008]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is an overall view of an underwater sensor mounting device showing one embodiment of the present invention. In the figure, reference numeral 1 denotes a floating body, which has a transition piece in this example. Reference numeral 2 denotes a sensor holding device for a rod or a rope, which is suspended from a mooring ring at the lower end of the floating body, and the sensor 3 is fixed at a predetermined water depth position. Reference numeral 4 denotes a mooring rod, which is a metal pipe such as a steel pipe or a stainless steel pipe having blind plates at both ends thereof, which is a hollow metal pipe whose weight in water is close to zero.

The length of the mooring rod is the length of the sensor holding device,
Depending on the location of the open sea / inland sea or the size of the difference in tides, it may be changed as follows. The molecular motion of water due to waves makes a circular motion equal to the height of the wave on the surface of the wave, and the radius becomes smaller at deeper positions. Therefore, if the length of the mooring rod is 1/2 or more of the maximum wave height of the installation location of the device, the sensor holding device will not be entangled with the mooring line even if there is a wave. If it is too long, there will be problems in strength or handling, but empirically if the length of the mooring rod is one and a half times the maximum wave height even during commutation when the tide changes and when heavy storms occur. , There is no entanglement with mooring lines. The maximum wave height at the installation location can be known from the Coastal Wave Observation Annual Report issued by the Ministry of Transport's Port Technology Research Institute.

5 is an intermediate float, 6 is a mooring rope such as nylon rope, 7 is a stud link chain of a mooring chain, which has a rising portion, and the rising portion and the mooring chain in the vicinity thereof are covered with rubber 8
Has abrasion resistance. The mooring rod 4, the intermediate float 5, the mooring line 6 and the mooring chain 7 are balanced in weight and buoyancy at the rising portions of the mooring rod so that the intermediate float is at a predetermined depth in the water. Is located in. The state shown in the figure shows a state in which the tide stops or a state in which there is little tide near the tide, and when the tide (direction of the arrow) is fast, the state is close to the catenary curve as shown by the two-dot chain line.

FIG. 2 is a partially enlarged view showing each connecting portion of the present apparatus. The floating body is a telemeter buoy and is drawn small for the sake of space. The case where the sensor holding device is a bar member is shown. The bar member is a sensor mounting bar 9 which is a round metal rod such as mild steel or stainless steel. The second eyepiece 10 and the eyepiece 11 are welded to the ends, and the mooring ring 12 at the lower end of the floating body is used. It is connected with a shackle. In addition, a connecting structure is provided on the way to provide flexibility.
Reference numeral 13 is a sensor cable, and 14 is a protective hose. 15
Is a swivel and 16 is a thimble.

FIG. 3 shows a case where the sensor holding device is a rope.
The rope 17 is a nylon rope or the like, and 18 is a resistance plate that also serves as a disc-shaped weight, and suppresses vertical movement of the rope due to waves to prevent kinks and entanglements.

FIG. 4 is a view showing an example in which a sensor is directly attached to a mooring line of a conventional floating body.

FIG. 5 is a view showing an example in which another line is similarly provided in the conventional example, a sensor is attached to the line, and an intermediate float is provided on the mooring line. In both cases, the two-dot chain line is the case where there is a tidal current.

[0016]

When the underwater sensor mounting device according to the first aspect is used, the mooring line and the sensor holding device are kept at a constant distance even when the tide is stopped, and the sensor holding device does not get caught in the mooring line even if there is a wave. In addition, the device will not cause a sensor cable disconnection accident.

According to the underwater sensor mounting device of the second aspect, the vertical movement due to the sway of the floating body due to waves is not transmitted to the sensor cable by the sensor mounting bar, and there is no accidental disconnection of the sensor cable.

If the underwater sensor mounting device according to claim 3 is used, the sensor holding device is a rope, which makes it easy to manufacture and handle. The sensor mounting line does not come into contact with the mooring line, and kinks such as kinks are also present. In addition, the device has no sensor cable disconnection accident.

[Brief description of drawings]

FIG. 1 is an overall view of an apparatus showing one embodiment of the present invention.

FIG. 2 is a partially enlarged view showing each connecting portion of the present device.

FIG. 3 is a view showing a case where the sensor holding device is a rope.

FIG. 4 is a conceptual diagram showing a conventional clamp device.

FIG. 5 is a conceptual diagram showing another conventional clamping device.

[Explanation of symbols]

 1 floating body 2 sensor holding device 3 sensor 4 mooring rod 5 intermediate float 6 mooring line 7 mooring chain 9 sensor mounting bar

Claims (3)

[Scope of utility model registration request] 1. A floating body located on the surface of the water, a sensor holding device which is suspended from the floating body in water and has a sensor attached at a predetermined water depth, and a mooring rod having one end locked to the floating body and the other end locked to an intermediate float. An intermediate float locked between the mooring rod and the mooring line and located in the water, a mooring rope that locks the upper end to the intermediate float and reaches near the bottom of the water, and a mooring chain that follows the mooring rope and reaches the sinker along the bottom of the water and the bottom of the water. An underwater sensor mounting device comprising: 2. The underwater sensor mounting device according to claim 1, wherein the sensor holding device is a sensor mounting bar in which a sensor is mounted at a predetermined water depth position of a rod-like member hanging from the lower end of the floating body. . 3. The underwater sensor mounting device according to claim 1, wherein the sensor mounting device is a sensor mounting rope in which a sensor is mounted at a predetermined water depth position of a rope hanging from a lower end of a floating body and a weight is mounted at a lower end. Underwater sensor mounting device.