JPH03225214A - Instrument for measuring loaded substance - Google Patents

Abstract

PURPOSE:To highly accurately measure the quantity of a loaded substance even if a loading place like a large ship is expanded by providing the loaded substance measuring instrument with a moving distance measuring means constituted of arranging a reflector on the prescribed position of a loading field or one side of a holder, and arranging an optical wave range finder 3 as a moving distance measuring means for measuring the moving distance of the holder. CONSTITUTION:The reflector 5 and a wave transmitter/receiver 6 are arranged on the holder 4 and the holder 4 is moved from one end of a ship 1 to the other end. A distance from the holder 4 up to the surface of soil 2 is found out by measuring the time required from the generation of an ultrasonic wave from the wave transmitter/receiver 6 up to the return of the wave reflected on the surface of the soil 2. On the other hand, a distance between the optical wave range finder 3 arranged on a deck and the reflector 5 fixed to the holder 4 is measured. When the distance from the range finder 3 up to the reflector 5 is defined as L, the fixing position of the transmitter/receiver 6 can be found out by correcting a distance l0 between the reflector 5 and the transmitter/receiver 6. The height of the soil 2 is measured by the transmitter/receiver 6 to find out a sectional area and the area is integrated by the distance information of the range finder 3 to find out the whole quantity, i.e. volume, of the soil 2.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a payload measuring device for measuring the volume of a payload such as earth and sand mounted on a ship or the like.

[Prior art]

Conventionally, as an apparatus of this type, there has been a volume measuring apparatus disclosed in Japanese Utility Model Application Publication No. 61-63105. FIG. 4 is a block diagram showing the system configuration. In the same figure,
21 to 25 are ultrasonic distance detectors, 26 to 30 are transducers, 31 is a container for storing a loaded object, 32 is a loaded object, 33 is an arithmetic circuit, 34 is a display, and 35 is a position detector.

The pulse waves from the ultrasonic distance detectors 21 to 25 are converted into ultrasonic waves by the transducers 26 to 30, and are emitted toward the loaded object 32. The ultrasonic waves reflected by the loaded object 32 are transmitted to the transducer 2
6 to 30, and the loading height of the loaded object 32 is determined by the ultrasonic distance detectors 21 to 25. The arithmetic circuit 33 multiplies the loading height by the preset length of each section X I''''X 4 of the container 31 to obtain the cross-sectional area of the loaded object 32.

On the other hand, the length of the loaded object 32 in the vertical direction is measured by a position detector 35, and the measured value is input to the calculation circuit 33. The arithmetic circuit 33 multiplies the measured value of the position detector 35 by the cross-sectional area of the loaded object 32 to calculate the volume of the loaded object 32. The calculated value is displayed on the display 34.

FIGS. 4(A), (B), (C), and (D) are diagrams each showing the configuration of a conventional payload measuring device mounted on a ship.

In FIG. 4(A), the position of the ship is read by a code parr 41 and a :1-code reader 40.

There is another method for reading the position of a ship, as shown in FIG. 4(B). FIG. 4B shows a method in which the rotary encoder 43 is driven and the horizontal movement distance is measured by the amount of movement of the wire lobe gear 42. In addition, Fig. 5 (C
) is a code bar 41 attached to the side of the ship, and a code reader 40 attached to a movable support 44 reads the distance traveled by 411.
This is a method of determining In the same figure (D), the rotary encoder 43 is directly connected to the roller 45, and the rotary encoder 43 is directly connected to the roller 45.
This method calculates the amount of movement based on the number of rotations.

[Problem to be solved by the invention]

However, for any of the above conventional configurations, the payload total i'1l
Even with the No. 11 device, for example, as the ship becomes larger, the scale also becomes larger, making it difficult to manufacture and at the same time, there are problems in that the measurement accuracy decreases.

The present invention has been made in view of the above-mentioned points, and eliminates the above-mentioned problems and makes it possible to accurately measure loads such as the amount of earth mounted on a ship or the like! 11 The purpose is to fold the fixed device.

[Means to solve the problem]

In order to solve the above-mentioned problems, the present invention provides a plurality of height measuring means for measuring the height from a fixed height of a movable platform that can move in the vertical direction of the loaded object to the surface of the loaded object in parallel in a direction that traverses the loaded object. A cross-sectional area calculating means for calculating the cross-sectional area of the loaded object from the output of the height measuring means, a reflecting mirror installed at a predetermined position of the loading place where the loaded object is mounted, or a reflecting mirror on one side of the mount, and a light wave It has a moving distance measuring means for measuring the moving distance of the frame on which the flllJ rangefinder is installed, and the cross-sectional area is calculated as the moving distance z! by the cross-sectional area calculating means. [It is characterized by comprising means for calculating the volume of the loaded object by integrating the distance measured by the constant means.

[Effect]

The moving distance 411j for measuring the moving distance of the gantry as described above.
As a means of measuring travel distance, a reflector is installed at a predetermined position of the loading area or on one side of the mount, and a light wave rangefinder is installed on the other side. The amount of cargo loaded can be measured with high accuracy even when the load is changed.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 is a diagram showing an outline of the configuration of the payload measuring device of the present invention,
FIG. 2 is a block diagram showing the system configuration. In FIG. 1, 1 is a ship, 2 is a soil mounted on the ship 1, 3 is a light wave range finder, 4 is a movable stand, 5 is a reflector, and 6 is a transducer. In Fig. 2, 6-1 to 6-n are transducers;
12-1 to 12-n are height detectors, 13 is a data processing section, and 14 is a display device. The operation of the loaded object measuring device having the above configuration will be explained below.

In Fig. 1, ±2 is first mounted on a ship 1, and a movable mount 4 is movably mounted on the deck of the ship 1. 6 is installed. The movable frame 4 moves from one end of the ship 1 to the other end. During this time, the distance to the soil surface is the transducer 6
This is determined by emitting ultrasonic waves from the soil 2 and measuring the time it takes for them to return after being reflected from the surface of the soil 2.

On the other hand, a light wave rangefinder 3 placed on the deck measures the distance to a reflecting mirror 5 attached to a movable pedestal 4. If the distance from the light wave range finder 3 to the reflecting mirror 5 is defined as distance @L, then the mounting position of the transducer 6 can be found by correcting the distance P0 between the reflecting mirror 5 and the transducer 6. be able to.

By measuring the height of the soil 2 using the transducer 6, determining the cross-sectional area, and integrating it using the distance information from the light wave range finder 3, the total amount of soil, that is, the volume can be determined.

The method for determining this amount of soil will be explained in detail using Figure 2. A plurality of transducers 6-1 to 6-n are attached to the movable frame 4. In order to improve the accuracy of soil volume measurement, it is better to have a larger number. The transducers 6-1 to 6-n are mounted at a known height Ho in advance. Now, transducer 6-
Assuming that the distance H1 from 1 to the surface of ±2 is found, the height hl of the soil 2 in which the volume of soil is to be determined is h, = H, -H.

becomes. If the transducers 6-1 to 6-n are arranged in a direction across the ship 1, that is, in a direction across the mounted ±2,
The cross-sectional area of soil 2 is found. The transducers 6-1 to 6-n are connected to height detectors 12-1 to 12n, and the heights h1 to h are determined here.

The cross-sectional area S at this time is S = h +'W1+h , w, + == 10h
, , -, ·w, , +h, , w, , -80. Here, So is a correction coefficient.

Assuming that the entire length of the ship 1 is P, the earth volume V can be determined by measuring the distance P from the breaking wave range finder 3 to the reflecting mirror 5,
Send it to the distance! Find the integral of .

Here, vo is a correction value. The calculation of this earth volume V is also performed by the data processing section 13. This calculation result is sent to the data processing unit 13.
It is output from the display unit 14 and displayed.

In the above embodiment, the reflecting mirror 5 is attached to the movable frame 4, but this reflecting mirror 5 is installed on the deck of the ship 1 and the light wave range finder 3 is attached to the reflecting mirror 5.
Of course, it is also possible to attach it to the movable frame 4.

In addition, although the above example shows an example of measuring the amount of soil loaded on the ship 1, the loaded object measuring device of the present invention is not limited to this, and can be used to measure the amount of loaded materials loaded on a flat loading field. It can also be used for measurement. Further, the loaded object is not limited to soil, sand, etc., and can also be used for measuring the amount of ore or grain placed in a yard.

〔Effect of the invention〕

As explained above, according to the present invention, a reflecting mirror is installed at a predetermined position in the loading area or on one side of the gantry, and a light wave range finder is installed on the other side, as a moving distance measuring means for measuring the moving distance of the gantry. This is a moving distance measurement means that can be used to measure the distance traveled by large ships, so even if the loading area of a large ship becomes larger, the amount of the loaded object can be measured accurately with a simple configuration without using a large scale. can get.

[Brief explanation of drawings]

FIG. 1 is a diagram showing an outline of the configuration of the payload measuring device of the present invention,
FIG. 2 is a block diagram showing the system configuration thereof, FIG. 3 is a block diagram showing the system configuration of a conventional payload measuring device, and FIGS. 4(A) and (B). (C) and (D) are diagrams each showing the configuration of a conventional payload measuring device mounted on a ship. In the figure, 1...Ship, 2...Soil, 3...Light wave range finder, 4...Moveable mount, 5...Reflector, 6-1
~6n...Transducer/receiver, 12-1~12-n...Height detector, 13...Data processing section, 14...Display device.

Claims (1)

[Claims] A plurality of height measuring means for measuring the height from a fixed height of a movable platform that can move the loaded object in the longitudinal direction to the surface of the loaded object are installed in a direction across the loaded object in parallel. , a cross-sectional area calculation means for calculating the cross-sectional area of the loaded object from the output of the height measuring means; a reflecting mirror is installed at a predetermined position of the loading place where the loaded object is mounted or on one side of the mount, and a light wave ranging device is installed on the other side. said cross-sectional area calculating means integrates the cross-sectional area by the distance measured by the moving distance measuring means, and calculates the volume of the loaded object. A payload measuring device comprising: