Machine-made sand void ratio online measurement system and method based on double cameras

A technology of machine-made sand and porosity, which is applied in measurement devices, machine learning, permeability/surface area analysis, etc., can solve the problems of complicated methods, errors, and low measurement efficiency in measuring porosity, so as to improve detection accuracy and efficiency, Realize the effect of online detection

Pending Publication Date: 2022-01-18
HUAQIAO UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above method of measuring porosity is relatively complicated, and manual operation may lead to errors, and the measurement efficiency is low
In addition, the image method can only measure 0.15-4.75mm machine-made sand at present, and there is a lack of particle measurement methods in the particle size range of 0.075-0.15mm, resulting in inaccurate measurement results

Method used

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  • Machine-made sand void ratio online measurement system and method based on double cameras
  • Machine-made sand void ratio online measurement system and method based on double cameras
  • Machine-made sand void ratio online measurement system and method based on double cameras

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Experimental program
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Effect test

Embodiment 1

[0059] This embodiment provides an on-line measurement system for the porosity of machine-made sand based on dual cameras, such as figure 1 As shown, the system includes a basic CCD camera 101, a precision CCD camera 102, an LED backlight 103, a prism group 104, a vibrating feeder 105, a transport tube 106 and a terminal 107 (such as a computer), and the basic CCD camera 101 and Precision CCD camera 102 is connected with terminal 107 respectively, and described vibration feeder 105 is positioned at the top of transmission pipe 106, and described prism group 104 is positioned between transmission pipe 106 and two cameras (101 and 102);

[0060] The basic CCD camera 101 is used to photograph the falling area of ​​the whole machine-made sand, and the precision CCD camera 102 is used to photograph a part of the falling area of ​​the whole machine-made sand, and the fine particles that the basic CCD camera 101 cannot measure are compensated by the precision CCD camera 102 ;

[006...

Embodiment 2

[0074] see Figure 1 to Figure 4 , a dual-camera-based online measurement method for the porosity of machine-made sand according to the present invention needs to provide the system as described in Embodiment 1, and the method includes the following steps:

[0075] Step 1. Turn on the LED backlight, basic CCD camera and precision CCD camera, start the vibrating feeder, control the mechanism of sand particles to fall evenly, and take pictures of the particles falling vertically with the dual cameras; refer to image 3 , the measurement principle of dual cameras, when the machine-made sand particles pass in front of the LED light source, the basic CCD camera obtains the image of the entire field of view, and the precision CCD camera obtains the image of the center part of the field of view after being refracted by the prism, so that the precision CCD camera can compensate the inability of the basic CCD camera Measured fine particles;

[0076] Step 2, in the image acquisition mo...

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Abstract

The invention provides a machine-made sand void ratio online measurement system and method based on double cameras, the system comprises a basic CCD camera, a precision CCD camera, an LED backlight source, a prism group, a vibration feeder, a transmission pipe and a terminal, the basic CCD camera and the precision CCD camera are connected with the terminal, the vibration feeder is located above the transmission pipe, and the prism group is positioned between the transmission pipe and the two cameras; the basic CCD camera is used for shooting a whole machine-made sand falling area, the precision CCD camera is used for shooting a part of the whole machine-made sand falling area, and fine particles which cannot be measured by the basic CCD camera are compensated through the precision CCD camera. According to the invention, dual-camera multi-scale measurement and machine learning are combined, the measurement difficulty of large dimension span of the machine-made sand is overcome, online detection of the void ratio of the machine-made sand can be effectively realized, and the detection precision and efficiency are improved. The void ratio detection precision of the double-camera detection system meets the actual engineering requirements.

Description

technical field [0001] The invention relates to the field of engineering machinery, in particular to a dual-camera based on-line measurement system and method for the porosity of machine-made sand. Background technique [0002] At present, the method of measuring the porosity of machine-made sand is mainly manual measurement: take 3L of the sample, pour the sample from the 50mm above the center of the capacity cylinder with a hole, let the sample fall freely, when the upper part of the capacity cylinder is piled When the surrounding area of ​​the capacity cylinder is full, stop feeding, and then use a ruler to scrape off both sides along the center line of the cylinder mouth, weigh out the total mass of the sample and the capacity cylinder, and obtain the loose bulk density. Then combined with the apparent density, the porosity of the machine-made sand can be obtained. The above-mentioned method for measuring the porosity is relatively complicated, and manual operation may ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/08G01N15/02G06T7/00G06T7/13G06N20/00
CPCG01N15/088G01N15/0227G06T7/0002G06T7/13G06N20/00G01N2015/0294G06T2207/10004G06T2207/20081
Inventor 林文华房怀英杨建红谭国亿胡祥李建涛
Owner HUAQIAO UNIVERSITY
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