JPH1048203A - Method for correcting quantity of water in fresh mixed concrete plant - Google Patents

Abstract

PROBLEM TO BE SOLVED: To correct the quantity of moisture accurately at the time of next kneading by picking up the feature of varying sand by means of a CCD camera, representing the feature thus picked up numerically and comparing the numerical value with a basic data. SOLUTION: Sand in a sand storage bottle 1 is thrown down into a sand measuring bottle 2. The situation is picked up by means of a CCD camera 3 which then delivers an image data to an image capturing section 5. Subsequently, the situation after throwing in the sand is picked up by means of the CCD camera and delivered to the image capturing section 5. The image data thus delivered is compared with a data (size and falling rate of sand and color, shape and size of sand hill) corresponding to moisture content initially set in the memory 6 of a computer in order to calculate the net moisture rate on the surface of sand. An optimal moisture content is determined and a computer 7 calculates and sets the mixing design for next batch. Subsequently, a water on/off valve 8 is controlled and the quantity of water is confirmed by a water measuring bottle 9 thus performing correction of the quantity of water required for producing fresh concrete.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water content value in 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. It relates to a correction method.

[0002]

2. Description of the Related Art In the production of ready-mixed concrete, sand, gravel,
The mixing design of water, admixture and cement, that is, the mixing ratio is important. In particular, the amount of water is greatly affected by the surface water content of the aggregate, mainly sand, which is fine aggregate.Therefore, the staff in the laboratory regularly measures the surface water content of the sand and determines the water roughness by the mixing design. ing.

[0003]

However, the above inspection work requires not only a skilled worker but also a variation in the surface water content of the sand actually measured. However, there is a problem that the ready-mixed concrete cannot be formed and the finished strength is lowered.

[0004]

In order to solve the above-mentioned problems, the present invention quantifies the inspection performed by a skilled worker by computer image processing and compares it with a numerical value stored in a computer memory in advance. The present invention provides a method for correcting a water amount in a ready-mixed concrete production plant, characterized in that a surface water ratio is calculated by using a formula (1), a water amount based on a blending design is calculated, and a water amount of a next batch is corrected.

[0005]

Next, the details of the computer image processing of the present invention will be described. The size (D1) and falling speed (D2) of the falling sand dropped into the weighing bin from the storage bin, and the color (D3), shape (D4), and size of the sand pile in the weighing bin after being dropped (D5) is captured as image data by a CCD camera,
Numerical values are compared with D1 to D5 corresponding to the water content stored in the computer memory in advance, the surface water content is calculated, the optimum water content is determined, and the water content of the next badge is corrected. D1 Since sand forms a lump depending on the water content (the amount of water contained in the sand), the area of the lump of sand at the time of falling is measured as a size D1. D2 Sand changes in viscosity when it contains moisture. Therefore, the falling speed from the storage bin to the weighing bin varies depending on the difference in moisture.
Therefore, the falling speed is measured as D2. D3 Since the sand becomes darker when it contains moisture, its color (shade) is measured and is referred to as D3. D4 sand changes its viscosity and weight when it contains water, and the height of the sand pit changes according to its water content.
D4. D5 The measurement of sand is performed by weight measurement, but if sand contains moisture, the volume changes even with the same weight. Therefore, the volume of the sand pit and the sand under the sand pit is measured, and the measured value is D5.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of the present invention.
A sand storage bin, the sand of which falls into two weighing bins directly below it. This situation is photographed by the CCD camera 3 and the captured image data is sent to the image capturing unit 5. The situation after the introduction is photographed by the CCD camera 4 and similarly sent to the image capturing section 5. The transmitted image data is compared with the data (D1 to D5) corresponding to each water content initially set in the computer storage memory of 6, and the true sand surface water ratio is calculated, and the optimum water amount is calculated. , 7 computer calculates and sets the next badge formulation, controls the opening and closing of the water open / close valve of 8
In this case, the water amount is checked in the water weighing bin, and the water value for manufacturing the ready-mixed concrete is corrected.

The processing flow will be described with reference to FIG. First, image data numerical values (D1 to D1) corresponding to respective surface water rates
(Corresponding to 5) is initially input into the computer storage memory of 6 (S1), and the measured or estimated surface water content (S
2) is input to register the blending design (S3). The sand
It is dropped into the weighing bin from the storage bin (S4), and the situation is collected by a CCD camera to collect image data, processed by computer image processing, and quantified (S5), corresponding to each preset surface water rate. Comparison with the image data values (D1 to D5) to determine the true sand surface water rate (S6), the calculation of the optimum water amount from the formulation design calculation, and the correction setting (S7)
Then, the process proceeds to the next badge processing (S3), and the badge ends (S3).
This flow is repeated until 8).

[0008]

As described above, in the present invention, the image data is taken in by the CCD camera as image data during the drop-in operation from the storage bin to the weighing bin and after the introduction, and the computer image processing is performed. In the past, the sand surface water content was calculated uniformly and quantitatively without relying on the qualitative judgment of skilled workers, and the next badge was given an appropriate amount of water, Can be manufactured.

[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]

 1. Sand storage bin 2. Sand weighing bin 3. 3. CCD camera 4. CCD camera Image reading unit 6. 6. Computer storage memory Computer 8. Water on-off valve 9. Water weighing bin

Claims (1)

[Claims] A CCD camera is used to determine the situation in which fine aggregate (sand) falls from a storage bin to a weighing bin and the situation after the fine aggregate (sand) is deposited on the weighing bin.
Photographed by a camera, the size of the sand at the time of falling, the falling speed, and the color, shape and size of the sand pit after deposition are quantified by computer image processing, and the water content of the sand stored in the computer memory in advance (contained in the sand Water amount in the ready-mixed concrete production plant, characterized in that the surface water ratio is determined by comparing with the numerical value corresponding to the water amount calculated, the optimum water amount is calculated by the water amount calculation of the mixing design, and the water amount of the next badge is corrected. Correction method