JPH063456B2 - Flow condition observation method and apparatus - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a flow condition observation method and apparatus for knowing the movement condition of sand near the coast.

[Conventional technology]

In general, near the coast, as shown in FIG. 5, there are a coastal flow 4 that is dominant outside the breaking zone 2 along the shoreline 1 and a beach flow 5 that is dominant near the breaking zone 2 due to the action of waves. The coastal current 4 is divided into the coastal current, tidal current,
This means wind-blown flow, sloped flow, etc. The beach flow 5 consists of mass transport due to waves, coastal flow 6 due to breaking waves, offshore return flow such as breakwater 7, and flow spreading at breakwater head 8. .

Therefore, in order to know the movement status of sand near the coast, it is necessary to grasp the state of these flows, that is, the flow condition,
The flow condition will be observed.

Therefore, in the conventional flow regime observation method, as shown in FIG. 6, a float 11 having a pole 10 with a cloth 9 erected on the upper portion thereof is used as the sea surface W. The position of the float 11 was detected by measuring the angle from a fixed point on land, which was floated on L, at two fixed points at fixed intervals by a transit, and the flow direction and flow velocity were measured.

However, this conventional method has a problem that if the distance between the float 11 and the transit becomes long, the float 11 cannot be collimated by the transit, and thus the flow condition cannot be observed over a wide range.

[Problems to be Solved by the Invention]

The present invention has been made in order to solve the above-mentioned conventional problems, and an object of the present invention is to provide a method and an apparatus for performing flow condition observation over a wide range with simple equipment.

[Means for Solving the Problems]

From a fixed point on the surface of the sea or on the ground, pull out one locking line with a floating body attached to the tip, set a video camera there and set the float floating on the sea surface by remote control of the video camera on the monitor TV. Capture at the aim point, the distance from the fixed point to the video camera and its azimuth,
A flow condition observation method in which the float position is calculated from the values obtained by measuring the altitude of the video camera and horizontal and vertical deflection angles at predetermined measurement times, and the flow direction is displayed, and the flow velocity is calculated from each measurement time. In addition, an aerial floating body and one video camera are attached to one locking line that can measure the amount of extension from a fixed point on the sea surface or on the ground where an azimuth measuring device is installed, and the camera is attached to the sea surface. The floating float is remotely controlled so that it can be captured at the sighting point of the monitor TV, and the camera is equipped with an altimeter and an angle meter for measuring the horizontal and vertical deflection angles, and a tuner for receiving radio waves from the video camera, each measurement It consists of a flow condition observation device provided with a CPU for processing data from the vessel.

〔Example〕

An embodiment of an apparatus for performing the flow condition observation by applying the flow condition observation method of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic explanatory view of a main part of the device in the embodiment, and FIG. The figure is an enlarged side view of the video camera of FIG. 1, and FIG. 3 is a side view for explaining the measurement principle when the observation is performed using the apparatus of FIG.
FIG. 4 is a plan view of FIG.

First, as shown in FIG.
The sea surface W. which is moored at the sea and has a position measuring device such as a gyro compass that can measure the direction. Ship 12 on L
Alternatively, a video camera 15 is attached to a kite 14 or a floating body such as a balloon that is locked in the air by a mooring line such as a kite thread 13 that can measure the amount of extension from a fixed point O on the ground, and as shown in FIG. W. The radio controlled transmitter 17 for controlling the remote control of the video camera 15 so that the float 11 floating on the L can be captured at the collimation point 16A of the monitor TV 16 shown in FIG.
Is provided.

The video camera 15 shown in FIG. ₂ is provided with an altimeter and an angle meter for measuring the horizontal deflection angle θ ₂ and the vertical deflection angle θ ₁ , respectively.
A tachometer such as 3 for measuring the amount of extension of the mooring line is provided on the ship 12 at the fixed point O.

On the other hand, a CP that processes the data from the tuner 18 and each measuring instrument that receives the radio wave W of the measured value from the video camera 15.
Plotter 2 showing the position of U19 and float 11
0 is provided.

A CRT can be used instead of the plotter 20.

When observing the flow condition using the flow condition observing apparatus of the present invention having the above-described structure, first, the video camera 15 attached to the kite 14 is remotely operated using the radio control transmitter 17 for control, and the monitor TV is displayed. Float 11 to 16 collimation points 16A
To capture.

Distance L from fixed point O in FIG. 3 to video camera 15
Is measured by a tachometer with respect to the amount of extension of the locking rope such as the kite thread 13 that locks the kite 14 or the floating body of the balloon.

Instead of measuring the amount of extension of the locking rope as described above, the video camera 15 is used to measure the fixed point O at the monitor TV 1.
Video camera 1 captured at 6A aiming point 16A
The distance L from the fixed point O to the video camera 15 can also be calculated by measuring the altitude h of 5 and the deflection angle θ ₃ in the vertical direction.

Further, the azimuth angle θ ₀ shown in FIG. 4 when the float 11 is captured is measured by a azimuth measuring device such as a gyrocompass, and the altitude h of the video camera 15 is measured by an item clock. The deflection angle θ _{2 in the} horizontal direction and the deflection angle θ _{1 in the} vertical direction are measured with the respective angle meters for measuring the deflection angle.

The time at each measurement described above is also measured and recorded at the same time. However, a series of measurements at the time of capturing the float 11 as described above is performed at predetermined intervals, and the data from each measurement device is stored in the CPU.
The position of the float 11 is shown on the plotter 20 or CRT, for example.

Therefore, in FIG. 3, from the fixed point O to the video camera 1
Water surface W.5 The distance l ₁ to the vertical position Ct on L and the distance l ₂ from the vertical position Ct to the float 11 are respectively And l ₂ = htan θ ₁ .

If the fixed point O is (0, 0) in the Cartesian coordinates (x, y) of the plan view of FIG. 4, the coordinates of the point B of the float 11 are x _B = l ₁ sin θ ₀ + l ₂ sin ( θ ₂ −θ ₀ ) y _B = l ₁ cos θ ₀ + l ₂ cos (θ ₂ −θ ₀ ).

The position of the float 11 is calculated from each value measured as described above, and the flow direction is displayed on the plotter 20, CRT, or the like,
The flow velocity can be calculated from the measurement time, and the movement of sand near the coast can be known from this.

〔The invention's effect〕 . The float position can be accurately, easily and easily adjusted because the direction of one video camera can be freely adjusted by remote control and the float can always be captured at the aiming point of the monitor TV.
And it can be grasped at low cost.

． Since the floating body and the video camera are attached to one locking line, the position of the video camera can be adjusted simply by pulling out or pulling the locking line, which is convenient, easy and inexpensive. Moreover, it is possible to observe the flow condition in a wide range.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view of an essential part of an embodiment of an apparatus for observing a flow condition by applying the method of the present invention, FIG. 2 is an enlarged side view of the video camera of FIG. 1, and FIG. A side view for explaining the measurement principle when using the device shown in the figure, Fig. 4 is a plan view of Fig. 3, Fig. 5 is a plan view showing the flow near the coast, and Fig. 6 is a flow condition observation. It is a perspective view of the float used for. 8 ... Tuner, 11 ... Float, 13 ... Kite thread, 14 ...
Kite, 15 ... Video camera, 16 ... Monitor TV, 16
A ... Aiming point, 19 ... CPU, 20 ... Plotter, h ... Altitude, L ... Distance, O ... Fixed point, θ ₀ ... Azimuth, θ ₁ , θ ₃ ...
Vertical deflection angle, θ ₂ ... Horizontal deflection angle, W ... Radio wave, W.I. L ... sea level.

Claims (2)

[Claims] 1. A locking line having an aerial floating body attached to its tip from a fixed point on the surface of the sea or on the ground, and a predetermined distance is pulled out to provide one video camera, and one video camera is remote from the other. By operation, the float floating on the sea surface is captured at the aiming point of the monitor TV, and the distance from the fixed point to the video camera and its azimuth, the altitude of the video camera, and the horizontal and vertical deflection angles are measured at predetermined times. A flow condition observation method in which the position of the float is calculated from the measured values for each time, the flow direction is displayed, and the flow velocity is calculated from each measurement time. 2. A locking line capable of measuring the amount of extension from a fixed point on the sea surface or on the ground where an azimuth measuring device is installed,
An aerial floating body and one video camera are attached, and the camera is remotely controlled so that the float floating on the sea surface can be captured at the aiming point of the monitor TV. The camera is used for measuring the altimeter and its horizontal and vertical deflection angles. A flow condition observation device equipped with a goniometer, a tuner for receiving radio waves from a video camera, and a CPU for processing data from each measuring device.