JP2007285704A - Method for measuring soil quantity loaded in earth and sand carrying vessel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To perform inspection on loaded objects in simple facilities while shortening construction periods on a method for measuring the soil quantity loaded in earth and sand carrying vessels. <P>SOLUTION: The surfaces of loaded objects loaded in a hold of an earth and sand carrying vessel 1 are divided into a plurality of sections on measurement processing. The load surface shape of the loaded objects is measured into three-dimensional data of divided loaded objects for every divided section with reference to a hold frame of the earth and sand carrying vessel. The three-dimensional data of divided loaded objects is captured in a computer 4 to convert the three-dimensional data of divided loaded objects on the plurality of sections into three-dimensional data on coordinate axes unified by setting one point in the hold frame as an origin of coordinates and combine it in such a way as to be continuous correspondingly to the divided sections. Coordinate data on the surface shape of the loaded objects and coordinate data on the shape of the hold frame both acquired as a result thereof are three-dimensionally superposed on each other to determine the volume of the section surrounded by the surface shape of the loaded objects and the lower shape of the hold frame by a capacity computing program. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a measurement method for measuring the amount of soil loaded on a sediment transport ship (hereinafter also referred to as a soil transport ship) with simple equipment and with high accuracy.

  Conventionally, as methods for measuring the sediment load of a sediment ship, there are weight inspection (conventional example 1) calculated from the weight and volume inspection (conventional example 2) where the volume is directly measured. As shown in FIG. 7, the weight inspection is usually a method of calculating the volume by obtaining the amount of drainage from the average draft at the left, right, and left of the bow, stern, and center, and measuring the specific gravity of the loaded sediment. This measuring method is certified both internationally and in domestic measurement laws, and is mainly used on bulk carriers such as iron ore and coal.

On the other hand, as the volume inspection, as shown in FIG. 8, using a surveying tape and staff, manually measuring the falling distance from the reference height and calculating the load, and FIG. As described above, there is a mechanical inspection for measuring the load using a measuring instrument. Manual inspection is the most proven method. The mechanical inspection includes non-contact measuring instruments (stereo matching digital camera measuring instrument (FIG. 9A)), light wave measuring instrument (FIG. 9B), laser measuring instrument, and ultrasonic measuring instrument (FIG. 9). (C)), etc.) (see Patent Document 1), the measurement target ship is measured from above.
JP 2001-141544 A

  However, in the conventional method for measuring the amount of load on the earth and sand carrier, for example, in Conventional Example 1, the volume is calculated based on the specific gravity. An error may occur. In the manual inspection of the second conventional example, since the entry into the transported sediment is actually measured, the safety is lowered depending on the weather and the state of the sediment. Moreover, a lot of measurement time is required as compared with other measurement methods.

  Furthermore, in the mechanical inspection of the conventional example 2, safety can be improved and the measurement time can be shortened compared to other inspections, but the current apparatus is a stand on which a measuring instrument for measuring the sediment transport ship is installed. Large-scale equipment is required. The load amount measurement method of the earth and sand carrier ship which concerns on this invention is proposed in order to solve such a subject.

The gist for solving the above-mentioned problems of the method for measuring the amount of load on the earth and sand carrier according to the present invention and achieving the object is to place the surface of the load loaded in the hold of the earth and sand carrier at a plurality of locations on the measurement processing. Split and
For each of the divided sections, the load surface shape of the load is measured with a small portable measuring instrument on the basis of the cargo frame of the earth and sand carrier ship, and the load division three-dimensional data at a predetermined point of the load surface shape is measured.
The load division 3D data is taken into the computer,
The volume calculation program incorporated in the computer converts each of the plurality of load-partitioned three-dimensional data into three-dimensional data on coordinate axes that are unified by setting one point of the cargo frame as a coordinate origin, and , Combine them so as to correspond to the divided sections,
The coordinate data of the surface shape of the load and the coordinate data of the shape of the cargo frame obtained as a result are three-dimensionally superimposed and surrounded by the surface shape of the load and the lower shape of the cargo frame. The volume of the corresponding portion is obtained by the volume calculation program.
In addition, the computer is portable and includes that the measurement operation can be performed with a mouse or a touch panel, and the measurement data can be stored and processed.

  According to the method for measuring the amount of load on the earth and sand carrier of the present invention, the measurement device is used, so there is little error in the measurement value, and the non-contact type measurement device is used, so there is no need to enter the hold and the operator Safety is improved. Furthermore, the measurement time and the like are also shortened compared to the conventional manual inspection. Since the measuring device or the like is a small portable device, a large frame required for the conventional mechanical inspection is unnecessary, and the cost is reduced. Further, remote operation and data processing are not required, and the communication system and the like can be omitted, which can be realized at low cost.

  As shown in FIGS. 1 and 2, the method for measuring the amount of load on the earth and sand carrier according to the present invention divides the surface 2a of the earth and sand 2 that is the load of the earth and sand carrier 1 into a plurality of locations for measurement. 1, measurement 2,... This is for convenience in measurement, and is divided into six parts as an example in a state in which the load 2 of the earth and sand carrier 1 is viewed in plan.

  Then, for each of the divided sections (measurement 1 or the like), the load shape of the earth and sand 2 is measured from the ship with a small portable measuring instrument. The small portable measuring instrument 3 in this case is a measuring apparatus capable of three-dimensional image data processing, such as a stereo matching digital camera measuring instrument or a light wave measuring instrument.

  As shown in FIG. 3 or FIG. 4 and FIG. 5, in the small portable measuring instrument 3, the load dividing division three-dimensional at a predetermined point in the surface shape of the load 2 with reference to the hold frame 5 of the earth and sand carrier 1. Get the data. For example, as shown in the image a in FIG. 5, the portion where the surface shape is changed is a portion to be measured as data, so the number of points is increased as much as possible. Since the bottom portion of the hold is often not visually recognized by the load 2, when the load 2 is entirely within the hold frame 5, it is downward with respect to the position of the upper surface of the hold frame 5. When the load 2 is filled with the cargo frame 5 and is further deposited thereon, the distance in the upward direction from the upper surface of the cargo frame 5 is measured.

  After the load division three-dimensional data is measured for each section, the load division three-dimensional data is taken into (inputted) to a computer 4 such as a portable computer (hereinafter abbreviated as PC).

  Using a volume calculation program (not shown) incorporated in the computer 4, the load division three-dimensional data is converted into three-dimensional data on coordinate axes that are unified by setting one point of the cargo frame 5 as the coordinate origin. And they are combined so as to be continuous corresponding to the divided sections (measurement 1, measurement 2,... Measurement 6).

  The coordinate data of the surface shape of the load obtained as a result and the coordinate data of the shape of the cargo frame are three-dimensionally superimposed to obtain an image c shown in FIG. In the image c, the volume 6 of the portion surrounded by the surface shape 2a of the load 2 and the lower shape of the cargo frame 5 is obtained by the volume calculation program. As shown in FIG. 6, a demonstration experiment was conducted using an actual earth ship using a stereo matching digital camera measuring instrument, a light wave measuring instrument, and manual inspection, and the surface shape of the load 2 by each method. When the cross-sectional shapes of these were compared, good results could be obtained.

It is explanatory drawing seen from the top explaining the load amount measuring method of the earth and sand carrier ship which concerns on this invention. It is explanatory drawing seen from the side surface explaining the loading soil amount measuring method of the earth and sand carrier ship of the same invention. It is explanatory drawing which shows a mode that the measurement data by measuring instruments, such as a digital camera, are taken in into PC. It is explanatory drawing which shows a mode that the measurement data by measuring instruments, such as the laser scanner, are taken in into PC. Explanatory drawing explaining the method of image processing It is a figure which shows the comparison with the measuring method which concerns on this invention, and the measuring method which concerns on another prior art example. It is explanatory drawing which shows the method of the weight inspection based on a prior art example. It is explanatory drawing which shows the method of human power inspection based on the prior art example. It is explanatory drawing (A), (B), (C) which shows the method of the mechanical inspection which concerns on the prior art example.

Explanation of symbols

1 earth and sand carrier,
2 Loads,
3 measuring equipment,
4 computers,
5 hold frame,
6 Volume of the load.

Claims (2)

Divide the surface of the load loaded in the hold of the earth and sand carrier into multiple locations on the measurement process,
For each of the divided sections, the load surface shape of the load is measured with a small portable measuring instrument on the basis of the cargo frame of the earth and sand carrier ship, and the load division three-dimensional data at a predetermined point of the load surface shape is measured.
The load division 3D data is taken into the computer,
The volume calculation program incorporated in the computer converts each of the plurality of load-partitioned three-dimensional data into three-dimensional data on coordinate axes that are unified by setting one point of the cargo frame as a coordinate origin, and , Combine them so as to correspond to the divided sections,
The coordinate data of the surface shape of the load and the coordinate data of the shape of the cargo frame obtained as a result are three-dimensionally superimposed and surrounded by the surface shape of the load and the lower shape of the cargo frame. Obtaining the volume of the portion by the volume calculation program,
A method for measuring the amount of soil loaded on a sediment carrier. The computer must be portable and perform measurement operations with a mouse or touch panel, and can store and process measurement data.
The method for measuring a load amount of a sediment carrier according to claim 1.

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