Accurate measuring device and method for grain shape of high-quality aggregate
A technology of measuring device and measuring method, which is applied in the direction of measuring device, analytical material, particle size analysis, etc., can solve problems such as the determination of machine-made sand, and achieve the effects of low cost, easy promotion and high characterization accuracy.
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Embodiment 1
[0054] like Figures 1 to 6 As shown, an accurate measuring device for high-quality aggregate grain shape includes a screening box 1 and an electronic scale 8. The electronic scale 8 is provided with a loading tray 7, and a screening device is arranged inside the screening box 1. The screening box 1 discharges materials The port is connected to the electronic scale 8, the discharge port of the screening box 1 is set above the carrier tray 7, an industrial camera 4 is also provided above the electronic scale 8, and a detection computer 10 is also provided on one side of the screening box 1, and the detection computer 10 and the industrial camera are 4. Electrical connection, the industrial camera 4 takes pictures of the aggregates on the carrier tray 7, and the detection computer 10 detects the grain shape of the aggregate pictures.
[0055] Screening box 1 sieves out the part below 1.18mm in the machine-made sand, and obtains the machine-made sand above 1.18mm. N particles of...
Embodiment 2
[0065] Further illustrate in conjunction with embodiment 1, as Figure 1-6 As shown in the figure, a part of 2.36-1.18mm particle size machine-made sand is extracted from the machine-made sand for cleaning. After cleaning, the machine-made sand is dried, and the dried machine-made sand is put into the screening box 1 for screening.
[0066] The 2.36-1.18mm particle size manufactured sand is preliminarily screened on the drum screen 11 inside the screening box 1, and the manufactured sand larger than 1.2mm is screened out from the first outlet 3, and the manufactured sand smaller than 1.2mm enters the filter plate 14 for the second step. filter.
[0067] After the secondary filtration, the part below 1.18mm in the machine-made sand is screened out, and the machine-made sand above 1.18mm is obtained.
[0068] The machine-made sand above 1.18mm falls on the tray 7, and the vibration device inside the tray 7 vibrates and spreads the machine-made sand on the tray 7.
[0069] Afte...
Embodiment 3
[0072] Further illustrate in conjunction with embodiment 1 and 2, as Figure 1-6 As shown, the gray value of the target particle on the photo of the machine-made sand on the object tray (7) is adjusted to 0, so that the collected photo is black and white, the target particle is black, and the background is white.
[0073] Scan each machine-made sand, extract the smallest circumscribed circle of each machine-made sand, and extract the largest particle diameter Di of the smallest circumscribed circle of the machine-made sand.
[0074] An electronic scale (8) weighs a single manufactured sand.
[0075] Obtain the weight Mi and the largest particle size Di of a single manufactured sand.
[0076] Defining the sphericity of manufactured sand particles is the ratio of the real volume of the particle to the volume of the sphere whose diameter is the maximum length of the particle, namely:
[0077]
[0078] where ρ is the density of machine-made sand. Sphericity The larger th...
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