JPH058970B2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a method for measuring water temperature, turbidity, etc. in lakes, etc., and more specifically, a measuring method that can continuously measure vertical distribution from the water surface to the lake bottom in a specific cross section. It's about.

(Prior art) Conventional technology for measuring water temperature, turbidity, etc. in lakes and marshes involves constructing a tower on the bottom of the lake and automatically raising and lowering the sensor section along the tower.
The sensor unit can be fixed to a tower and measured at a constant water depth, and the measured data can be transmitted by wire or wirelessly to a control and recording device on the opposite shore. Alternatively, a surface buoy can be installed in the lake and several This is a method in which a fixed sensor section is installed or a winch is installed on the surface buoy to automatically raise and lower the sensor section to take measurements, and the measured data is transmitted to a recording device by wire or wirelessly.

In conventional methods, whether using the tower method or the buoy method, if the sensor unit is fixed, only the relevant water depth position can be measured, but if the sensor unit is automatically raised and lowered, it can be measured continuously from the water surface at a specific position to the lake bottom. This has the advantage of making it possible to measure vertical distribution. However, it was not possible to measure the continuous vertical distribution of the entire cross section in lakes and marshes.

Additionally, constructing a tower within the lakebed has problems such as high construction costs and poor maintainability.
In addition, the buoy method also has poor maintainability and requires additional equipment such as a work boat, resulting in high costs.

On the other hand, in the case of artificial lakes with dams, construction of towers may be prohibited due to concerns that the construction of towers will have a negative impact on the dam, or if the lake is located in a specific area, such as a national park, it may be prohibited to build towers to protect the environment. In addition to the measurement range problem, the tower and buoy method also has problems such as restrictions on installation, as there are regulations prohibiting structures from rising above the water surface of lakes and marshes.

(Problem to be Solved by the Invention) The problem to be solved by the present invention is to provide a method for measuring water temperature, turbidity, etc. in the entire cross-sectional area of a lake or marsh without constructing a tower or the like. .

(Means for solving the problem) Means for solving the problem in the present invention are as follows:
A control recording device and a first winch are installed on one shore of the lake, and a second winch is installed on the other shore, and a communication cable is wrapped around the first winch and connected to the control recording device. A sensor section for measuring water temperature or turbidity, etc. is coupled, a wire wound around the second winch is coupled to the sensor section, the breaking strength of the communication cable is set higher than that of the wire, and the first and second
Drive the winch to tension the cable and wire to select a measurement position by the sensor unit, then drive one or both of the winches to loosen the cable or wire and move the sensor unit toward the lake bottom. The sensor unit is characterized in that it continuously measures the vertical distribution of water temperature, turbidity, etc. at the position to which it moves.

(Function) After setting the cable 4 and wire 7 under tension and selecting the position of the sensor unit 5 in a lake or marsh,
By fixing one of the cable 4 and the wire 7 and loosening the other, or by loosening both, the sensor unit 5 is submerged, and the water temperature or turbidity can be measured at any water depth along the measurement line along which the sensor unit 5 moves. Take measurements.

(Example) The drawings show a specific example of implementing the method of the present invention, and FIG. 1 is a cross-sectional view of a lake and marsh, and FIG. 2 is a plan view of the same.

A control recording device 2 and a first winch 3 are installed on the shore of a lake 1. A communication cable (armored cable) 4 is wound around the first winch 3, and a sensor section 5 for measuring water temperature, turbidity, etc. is attached to the tip of the communication cable 4.
On the other hand, a second winch 6 is installed on the opposite shore from the installation location of the first winch 3, and a wire 7 whose tip is connected to the sensor section 5 is attached to the second winch 6.
is being wound up.

Note that the control recording device 2 and the first winch 3 are preferably housed in a housing. or,
Reference numeral 10 indicates a dam installed on the lake.

To measure the water temperature or turbidity in the lake using the equipment installed in this way, first, both the communication cable 4 and the wire 7 are put under tension, and the sensor part 5 is moved to the desired position using both winches 3 and 6. Select the measurement position by moving to the desired position. In the illustrated position, the sensor unit 5 is located at approximately the center A of the lake, and in order to measure at this position, the shaft of the second winch 6 is fixed, and then the shaft of the first winch 3 is rotated. When the communication cable 4 is let out, the sensor section 5 moves toward the lake bottom along a radial measurement line a centered on the second winch 6. Therefore, measurement can be performed at any water depth position along the measurement line a.

Next, in order to measure the measurement line b position, the sensor section 5 is moved from the A position to the B position. In this case, by releasing the shaft of the first winch 3 and driving the second winch 6, the sensor unit 5 is moved rightward in the drawing. Then, when the sensor section 5 reaches the B position, measurement is performed along the measurement line b.

Further, for measurement at a position along the measurement line c, the sensor section 5 is moved in the opposite direction to the above, and measurement is started from the position of the lake surface C.

In this way, the sensor section 5 is used to drive either the first or second winch 3 or 6 to select a measurement position on the lake surface, and the second winch 6 is fixed at that position and the first winch 3 is driven. , the sensor section 5 is connected to the second
The sensor unit 5 is moved along a measurement line centered on the winch 6 to perform measurements.

In the embodiment, the cross section in the line direction connecting the set positions of the first and second winches 3 and 6 can be measured. If it is installed movably along the shore, measurements can be taken at other locations.

In addition, the breaking strength of the communication cable 4 and the wire 7 is such that the communication cable is stronger, for example, the communication cable
By setting the wire so that it can handle a force of about 300Kg against 1000Kg, even if a load is generated on the sensor section for some reason during measurement, rotating the first winch 3 in that state will cause the wire 7 to The one who cuts it. Therefore, even if an accident like the one described above occurs, the sensor section 5 and the communication cable can be recovered.

Furthermore, although the embodiment has been described with respect to the case where measurements are taken within a lake, measurements can also be made in locations where communication cables and wires can be fixed, for example, locations where there is a shore at an opposing position, such as at the mouth of a bay.

(Effects of the Invention) The present invention combines a sensor section with a communication cable and a wire, installs the communication cable and wire on the opposite shore so that they can be wound, and then moves the sensor section into the water with one side fixed, and fixes the sensor section underwater. Continuous vertical distribution measurement in the radial direction centered on the side can be performed. Furthermore, by changing the position of the sensor section on the lake surface, it is possible to measure the entire cross-sectional distribution within the lake.

In addition, although the present invention installs a winch on the lake shore, most of the ropes with the sensor attached are submerged in the water, so water temperature or turbidity can be controlled without installing any structures in lakes or marshes. In addition to being able to measure
This has the effect that the measuring equipment does not damage the surrounding environment.

[Brief explanation of the drawing]

The drawings show a specific example of implementing the method of the present invention, and FIG. 1 is a plan view of equipment installed on the lake shore, and FIG. 2 is a plan view of the same. 1... lake, 2... control recording device, 3... first
Winch, 4...Communication cable, 5...Sensor section, 6...Second winch, 7...Wire.

Claims (1)

[Claims] 1. A control recording device and a first winch are installed on one shore of a lake, etc., and a second winch is installed on the other shore, and a communication cable is wrapped around the first winch and connected to the control recording device. A sensor unit that measures water temperature or turbidity, etc. is combined with the
A wire wound around the second winch is coupled to the sensor section, the breaking strength of the communication cable is set higher than that of the wire, and the first and second winches are driven to tension the cable and wire. to select the measurement position by the sensor part, then drive one or both of the winches to loosen the cable or wire and move the sensor part towards the lake bottom, and measure the water temperature at the position where the sensor part moves. Or a method for measuring water temperature, turbidity, etc. in the entire cross-sectional area of a lake or marsh, etc., which is characterized by continuous vertical distribution measurement of turbidity, etc.