JPH1048143A - Erroneous mixing-preventing aggregate-discriminating method in ready-mixed concrete production plant - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the erroneous mixing of aggregate as caused by overlooking and forgotten checking by photographing the aggregate with a CCD camera as conveyed to a storage bin with a belt coneyor from a silo to perform an image processing. SOLUTION: When individual storage quantities run short in a sand storage bin 1 and a pebble storage bin 2, sand or pebble is conveyed by a belt conveyor 5 from a sand silo 3 or a pebble silo 4. The state of conveying the sand or pebble is photographed by a CCD camera 6 and an image processing is performed. In other words, an image data obtained is compared with a data corresponding to the size of each particle initially set on a computer memory 8 to recognize the sand or pebble by a computer 9 thereby enabling judgment of whether conveying is made to a wrong storage bin 1 or 2. When the conveying is wrong, the belt conveyor 10 is stopped immediately to halt the conveyance thereby preventing erroneous mixing.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a ready-mixed concrete production plant which mixes and kneads water, admixture, aggregate (fine aggregate: sand, coarse aggregate: gravel) and cement to produce ready-mixed concrete. The present invention relates to a method for preventing aggregate separation.

[0002]

2. Description of the Related Art When the storage amount of storage bins becomes insufficient,
Sand and gravel are conveyed from the silo to each storage bin by a belt conveyor. However, since the same belt conveyor is used, when the material is insufficient, the worker is transported to the storage bin by switching between sand and gravel according to the situation.

[0003]

However, in many cases, it is not confirmed whether the material being conveyed is sand or gravel on a belt conveyor rather than a silo, and erroneous mixing into storage bins occurs. Production of the ready-mixed concrete must be temporarily stopped and the original condition must be restored over many hours, and problems such as delays in site construction occur.

[0004]

In order to solve the above-mentioned problems, the present invention quantifies sand or gravel conveyed by a belt conveyor by computer image processing on behalf of an operator, and converts the sand or gravel into a computer memory in advance. A ready-mixed concrete production plant characterized by determining the size of sand and gravel grains by comparing with the values stored in The present invention provides a method for separating aggregates for preventing erroneous mixing.

[0005]

Next, the details of the computer image processing of the present invention will be described. Before the sand and gravel are put into the storage bin, the size of the sand or gravel on the belt conveyor (D
1) The color (D2) is captured as image data by a CCD camera, digitized, and D1 to D2 corresponding to the grain size stored in advance in the computer memory are compared to determine sand and gravel. And sand into different storage bins,
Prevents gravel from being mistakenly mixed. The size of D1 sand and gravel are obviously different, and can be distinguished by measuring the size. Therefore, the area of the sand and the gravel is measured, and is set as the size D1. D2 Sand and gravel are often made of different materials than the place where they were collected, and it is possible to find a difference depending on the color (shading).

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of the present invention, wherein 1 is a storage bin for sand, 2 is a storage bin for gravel, and silos (3 are silos for sand, 4 is a gravel silo), sand or gravel is conveyed by a belt conveyor of 5
The image data captured and captured by the CD camera is sent to the image capturing unit 7. The sent image data is compared with data (D1 to D2) corresponding to the size of each grain initially set in the computer storage memory 8 to recognize sand and gravel. And compare the storage bins to determine whether they are transported to a different storage bin. The method for separating aggregates for preventing erroneous mixing in a ready-mixed concrete production plant is carried out.

The processing flow will be described with reference to FIG. First, image data numerical values (D1 to D1) corresponding to the size of each grain
(Corresponding to D2) is initially input to the computer storage memory 7 (S1), and the aggregate (sand and gravel) is registered (S2).
When the storage amount of the storage bin is insufficient and sand or gravel is conveyed by a belt conveyor from the silo (S3), the conveyed sand or sand is collected as image data by a CCD camera, and computer surface image processing ( S4) and
Numericalization is performed, and compared with image data values (D1 to D2) corresponding to the size of each grain set in advance, sand and
Gravel is identified (S5) and compared with the type of storage bin at the destination (S6). If incorrectly mixed, the transport is stopped (S8). If correct, the process proceeds to the next badge process (S3), and the storage bin is filled. This is a flow in which measurement is performed successively until the operation is completed, and this is repeated until the badge ends (S7) and the conveyance stops (S8).

[0008]

As described above, in the present invention, the aggregate (sand or gravel) being conveyed to the storage bin is captured as image data by a CCD camera as image data, and computer image processing is performed. In addition, it is possible to prevent an operator from overlooking or forgetting to confirm, and to prevent erroneous mixing of aggregate.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of one embodiment of the present invention.

FIG. 2 is a flowchart of a process according to an embodiment of the present invention;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sand storage bin 2 Gravel storage bin 3 Sand silo 4 Gravel silo 5 Belt conveyor 6 CCD camera 7 Image reading unit 8 Computer storage memory 9 Computer 10 Belt conveyor motor

Claims (1)

[Claims] An image of an aggregate transported from an aggregate stock location (silo) to a storage bin in a batcher plant by a belt conveyor is taken by a CCD camera, and the size and color of the aggregate are processed by computer image processing. It is characterized by digitizing, comparing the size of the aggregate grain stored in advance in the computer memory with the corresponding value, judging sand and gravel, and preventing erroneous mixing into the storage bin. Method for preventing mis-mixing in ready-mixed concrete production plants.