JPS61283823A - Flowmeter for river - Google Patents

Abstract

PURPOSE:To enable the rate of a flow to be accurately measured by a simple operation by suspending a surveying pole so as to be able to ascend and descend from a carrier mounted on a guide rope stretched across a river in a direction perpendicular thereto such that the carrier can freely travel along the guide rope and mounting a current- meter and a pressure type sounder to the top of the surveying pole. CONSTITUTION:A guide rope 2 is stretched across a river perpendicularly thereto between towers 1 and 1 mounted to both the banks of the river and a carrier 3 is mounted on the guide rope 2 so as to be allowed to freely travel along the rope 2. A surveying pole 9 is suspended from a transmitting board 7 suspended from the carrier 3 through an operating rope 5 so as to be able to freely ascend and descend 5 and a pressure type sounder 12 provided with a deadweight 10, a current-meter 11 and a grounding switch 13 with a level detecting sensor is mounted to the top of the surveying pole 9. When the carrier 3 is run to a required position and the pole 9 is lowered, a depth of water is instantaneously measured by the sounder 12 through a signal indicating that the grounding switch 13 reaches the bottom 14 of the river and the flow velocity of the river is measured by the current-meter 11, both being fed to a data recorder 15.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a river flow measuring device.

(Prior Art) Conventionally, when measuring the flow rate of a river, the flow rate is measured based on the flow velocity at each part of the cross section of the river and the cross-sectional area of the flow.

When measuring the cross-sectional area of a stream, when the water depth is shallow, such as during a drought, an observer may use a tape and a surveying pole to measure the lateral area; A hanging box was suspended from a cable carrier, and an observer boarded the hanging box and surveyed using the same tape and surveying pole.

There are also cases where surveys are conducted remotely using cable carriers. In this case, when the pole is suspended from a carrier and placed on the riverbed for measurement, the pole is washed away by the river flow and tilted, and the angle of inclination is measured using a telescope. The depth of the water was determined by visually judging the installed angle meter and also by calculating the sinking distance of the pole and the angle of inclination of the pole.

(Problems to be Solved by the Invention) However, all of the conventional methods described above are complicated to operate, difficult to accurately measure the entire cross section of the flow path, and - dynamic observation and unmanned observation are impossible. Met.

(Means for Solving the Problems) The present invention was proposed and devised to solve the above problems, and it is a guide cable that spans both banks of a river in a direction perpendicular to the river. This relates to a river flow measuring device characterized in that a current velocity meter and a pressure type depth gauge are attached to the tip of a surveying pole that is suspended so as to be able to rise and fall from a carrier that is freely movable. .

(Function) Since the present invention is configured as described above, the carrier attached to the guide rope spanned across both banks of the river in a direction perpendicular to the river can be moved as required along the guide rope. When the surveying pole is lowered, the depth of the water is instantly measured by the pressure-type depth gauge attached to the tip of the pole based on the signal that the pole has landed on the riverbed, and the measurement data is sent to the ground by radio signal. Sent to the side. At the same time, the current speed of the river is measured by a current meter attached to the tip of the pole, and the measured data is sent to the ground via a wireless signal.

In this way, the flow rate of the river is measured.

In the case of automatic observation, by giving a signal to start observation, the surveying pole suspended from the carrier is moved to a predetermined position in the direction across the river, and at the same time, the pole is lowered to reach the riverbed. At the same time, data on water depth and current velocity is sent to the ground using radio signals in the same manner as above, and then the pole is raised to move the carrier to the next measurement position, and the same operations as above are performed at that position. The system repeats the same process and sequentially observes the entire river in the transverse direction, and when the observation is completed, it is automatically moved to a predetermined waiting area and is kept on standby until the next observation.

In addition, in the case of unmanned observation, if the date and time are set in advance,
Similar to the automatic observation described above, the entire river crossing direction is observed at the determined date and time, and this data is transferred to a manned base using a telemeter, or the data is automatically recorded on recording paper or magnetic tape at the location. It can be recorded.

(Effects of the Invention) As described above, according to the present invention, the flow rate can be easily measured over the entire cross section of the river channel, and automatic observation and unmanned observation are also possible.

Furthermore, since a pressure type depth gauge is attached to the tip of the pole, even if the pole is tilted due to the flow of the river, the influence of the tilt is not a factor and accurate measurements can be made.

(Example) The present invention will be described below with reference to embodiments shown in the drawings.

(1) is a tower placed on both banks of the river, a guide cable (2) is spanned between each tower (1), and a carrier (3) can run freely on the tower (2). It is mounted on.

In the figure, (4) is a transverse cable, (5) is an operating cable, and (6) is a winch for operating the element.

A loading block (transmission board) (7) is suspended from the carrier (3) via an operating cable (5) so as to be movable up and down.

A surveying pole (9) is suspended from the loading block (7) via a flexible pin (8), and a weight (10), a current meter (11), and a pressure type depth meter are attached to the tip of the pole (9). meter (12) is attached. Same pressure type depth gauge (12)
A ground switch (13) with a water surface detection sensor is attached to the.

The pressure type depth gauge (12) measures the water depth instantaneously based on the signal from the survey pole (9) landing on the riverbed (14), and transmits the data using a wireless signal to the receiving board on the ground side and the data recording device (15). ) and is configured to send to a current meter (
11) is also configured to similarly send measurement data to the receiving board and data recording device (15) using a wireless signal.

Since the illustrated embodiment is constructed as described above, the carrier (3) attached to the guide cable (2) that spans both banks of the river in a direction perpendicular to the river can be Cable (2
) to the required point, and the operating cable (5
) to lower the pole (9), the grounding switch (13) at the tip of the pole (9) will touch the river bed (14).
The pressure type depth gauge (12
), the water depth is measured, and the measured data is sent by radio signal to the receiving board and data recording device (15) on the ground side. At the same time, the flow velocity of the river is measured by a current meter (11) attached to the tip of the pole (9), and the measured data is sent by radio signal to a receiver on the ground and a data recording device (15).

When the measurement is completed in this way, the carrier (3) is moved along the guide rope (2) to the next measurement point, and the same operation as described above is repeated at that point. It measures the flow rate of the river over the entire area.

In the case of automatic observation, by giving a signal to start observation, the surveying pole (9) suspended from the carrier (3) is moved to a predetermined position in the transverse direction of the river, and at the same time the pole ( 9) to land on the river bed (14), and at the same time transmit water depth and current velocity data via radio signals to the receiving board on the ground and the data recording bag! (1
5), then raise the pole (9) and repeat the same operation as described above again at the next measurement position, and thereafter observe in the same manner over the entire transverse direction of the river,
When an observation is completed, it automatically moves to a fixed waiting area and waits until the next observation.

In addition, in the case of unmanned observation, if the date and time is set in advance, the entire river crossing direction will be observed at the predetermined date and time in the same way as the automatic observation described above, and this data will be transmitted to the manned base using a telemeter etc. Alternatively, data can be automatically recorded on recording paper or magnetic tape at the location.

As described above, according to the illustrated embodiment, the flow rate can be easily measured over the entire cross section of the river channel, and automatic observation and unmanned observation are also possible.

Furthermore, the pressure-type depth needle (12) attached to the tip of the pole (9) is connected to the river bed (
14), the water depth is instantaneously measured by the signal that landed on the pole, and the measured data is sent to the receiving board and data recording device (15) by wireless signal. (9) is shown in Figures 2 and 3.
Even if it is tilted as shown in (9a) and (9b) in the figure, measurement is performed with almost no influence from the tilt.

Note that (B) in FIG. 3 shows the average position of the measured cross section.

Although the present invention has been described above with reference to embodiments, it goes without saying that the present invention is not limited to such embodiments, and that various design changes can be made without departing from the spirit of the present invention. .

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of a river flow measuring device according to the present invention, FIG. 2 is a longitudinal sectional side view thereof, and FIG. 3 is a plan view thereof. (2)...Guide rope, (3)...Carrier (9).
...Survey pole, (11) ... Current meter (12) ...
pressure depth gauge

Claims (1)

[Claims] A current meter and a pressure-type depth gauge are attached to the tip of a surveying pole that is suspended so that it can be raised and lowered from a carrier that is movably attached to a guide cable that spans both banks of the river at right angles to the river. A river flow measuring device characterized by being worn.