JPS63222211A - Deposited sand thickness measuring system on sand scattering ship - Google Patents

Abstract

PURPOSE:To automatically and continuously calculate a deposited sand thickness, by mounting depth sounders on the sleighs provided on both front and rear sides of the duct suspended to the sea bottom from a sand scattering ship and towing said sleighs to calculate the difference between the values of the depth sounders. CONSTITUTION:A duct 5 scattering sand 3 to the sea bottom from a sand scattering ship 1 is provided to the ship 1. Towing stays 9, 10 are provided before and behind the advance direction of the ship 1 and sleighs 11, 14 are towed by ropes 10, 13. Depth sounders 7, 8 are mounted on the sleighs 11, 14 and the depths measured by the depth sounders 7, 8 are informed to the ship 1 through signal cables 15, 16. The laminated thickness of sand 3 is calculated from the difference between the outputs of the depth sounders 7, 8. By this method, the thickness of sand is automatically and continuously calculated and sand scattering quantity is easily controlled.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a sand thickness measuring method for measuring the thickness of sand spread on the seabed in a sand scattering boat.

[Conventional technology]

Conventionally, various sand thickness measurement methods of this type have been put into practical use, and for example, there is a measurement method using a reinforcing bar.

This measurement method involves manually inserting a reinforcing bar into the seabed from atop a sand-spraying boat, and manually detecting the difference in resistance between the spread sand and the underlying seabed ground. The length is measured by the length of the reinforcing bar.

[Problem that the invention seeks to solve]

However, in the sand thickness measurement method, measurement is performed manually, and based on the change in resistance value when felt by the hand,
In order to measure the sand plain, there were problems in that the measured values differed depending on the person and continuous measurement was impossible.

The present invention has been made in view of the above-mentioned problems, and its purpose is to provide a method for measuring sand thickness in a sand scattering boat that can automatically and continuously measure the sand plain.

[Means for solving problems]

The structure of the present invention that achieves the above object is to tow depth gauges mounted on sleds to the seabed on the front and rear sides of the duct, and calculate the difference between the water depth signals outputted from these depth gauges by measuring the difference between the depth signals of the scattered sand. The gist is to detect the thickness.

[For production]

In the above configuration, when the sand spreading boat moves forward while spreading the loaded sand onto the ground on the seabed through the duct, the front water depth gauge is towed above the ground, and the rear water depth gauge is towed above the spread sand. be done.

Water depth signals are output from the front and rear water depth gauges and input to the water depth difference detection circuit.

The water depth difference detection circuit detects the water depth difference from the difference in the input water depth signals, and continuously outputs the detected water depth difference to the display device as the thickness of the spread sand.

Therefore, the thickness of the spread sand can be automatically and continuously measured, and the above-mentioned problem can be eliminated.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

FIG. 1 is a cross-sectional view showing a sand thickness measurement method in a sand scattering boat according to an embodiment, and FIG. 2 is a perspective view showing the main parts of a sand flat measuring device used directly to implement the sand thickness measurement method.

In Figures 1 and 2, 1 is sand 3 on the ground 2 on the seabed.
The sand scattering boat 1 moves forward while dispersing sand.The sand scattering boat 1 has a duct 5 that guides the loaded sand 4 above the ground 2, and a duct 5 that guides the loaded sand 4 above the ground 2. It is equipped with a sand flat measuring device 6 for measuring the thickness.

This sand flat measuring device 6 includes a water depth gauge 7 installed on the front side of the duct 5 and a water depth gauge 8 installed on the rear side of the duct 5.

Both the front and rear water depth gauges 7.8 have built-in water pressure sensors that detect the water pressure at the water depth, and can output detection signals from these water pressure sensors as water depth signals.

The front water depth gauge 7 is located in front of the duct 5 and is installed on a bridge 11 connected to the lower end of the towing stay 9 with a rope 10 so as to be smoothly towed over the ground 2 on the seabed.

In addition, the water depth gauge 8 on the rear side is located on the rear side of the duct 5 and the sand 3
It is installed on a bridge 14 connected to the lower end of the towing stay 12 with a rope 13 so that it can be towed smoothly over the top.

Note that 15 and 16 are signal cables.

FIG. 3 is a block diagram showing the control system of the sand flat measuring device.

As shown in the figure, the front and rear water depth gauges 7 and 8 are both connected to a water depth difference detection circuit 17.

This water depth difference detection circuit 17 is a circuit that detects a water depth difference from the difference in water depth signals from the front and rear water depth gauges 7°8, and outputs the detected water depth difference to a display device as the thickness d of the scattered sand. It is.

Next, a method for measuring sand flats, which is the gist of the present invention, will be explained.

As the sand spreader 1 moves forward while spreading the loaded sand 4 onto the ground 2 on the seabed via the duct 5, the water depth gauge 7 on the front side is on top of the ground 2, and the water depth gauge 8 on the rear side is on the top of the sand 3 that has been spread. being towed above.

The difference between the water depth at which the front water depth gauge 7 is located and the water depth at which the rear water depth gauge 8 is located corresponds to the thickness d of the spread sand 3.

Therefore, as shown in FIG. 3, when the water depth signals output from the front and rear water depth gauges 7.8 are input to the water depth difference detection circuit 17, the water depth difference detection circuit 17 determines the water depth based on the difference between the input water depth signals. Detect the difference and spread the detected water depth difference 3
It is output continuously to a display device as a thickness d.

Thereby, the thickness d of the spread sand 3 can be measured automatically and continuously.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, depth gauges mounted on sleds are towed onto the seabed on the front and rear sides of the duct, and the difference in water depth signals output from these depth gauges is dispersed. Since we adopted a sand thickness measurement method that detects the thickness of the scattered sand, it is possible to automatically and continuously measure the thickness of the scattered sand.

Therefore, it is possible to control sand removal by the sand scattering boat, rather than making it easier to manage the sand field by the sand scattering boat.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing the sand thickness measurement method in the sand spray boat according to the embodiment, Fig. 2 is a perspective view showing the main parts of the sand flat measuring device used directly to implement the sand thickness measurement method, and Fig. 3 is FIG. 2 is a block diagram showing a control system of the sand plain measuring device. 1...Sand sprinkler 2...Ground 3...Sand 4...
Loaded sand 5... Duct 6... Sand flat measuring device 7, 8
...Water depth gauge 11.14...Bridge 17...Water depth difference detection circuit Patent applicant Oki Electric Industry Co., Ltd. Mitsui Fudosan Construction Co., Ltd. Representative Patent attorney Takashi Kankura Nisun 1 Enwa 2 Figure Sunahara measurement Block section 3 (21

Claims (1)

[Scope of Claims] 1. In a sand thickness measurement method in a sand scattering boat that measures the thickness of sand spread on the ground of the seabed through a duct, the method includes: A method for measuring sand thickness in a sand scattering boat, which is characterized by towing depth gauges and detecting the difference in water depth signals output from these depth gauges as the thickness of the sand being spread.