CN210136151U - Machine-made sand quality detection equipment - Google Patents
Machine-made sand quality detection equipment Download PDFInfo
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- CN210136151U CN210136151U CN201920667570.4U CN201920667570U CN210136151U CN 210136151 U CN210136151 U CN 210136151U CN 201920667570 U CN201920667570 U CN 201920667570U CN 210136151 U CN210136151 U CN 210136151U
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Abstract
The utility model discloses a machine-made sand quality detection device, which comprises a feed inlet, a water content measuring device, a sample feeding device, a powder content measuring device, a dispersing device, an image acquisition device, an image analysis device and a recovery device; the water content measuring device comprises a drying device for drying the machine-made sand, so that the influence of particle bonding on image acquisition is prevented; the powder content measuring device comprises a dust collector which is used for removing stone powder in the machine-made sand, so that dust is prevented from influencing image acquisition. It has the following advantages: a water content measuring device and a powder content measuring device are added, and machine-made sand is preprocessed before an image is collected, so that the reliability of the image is improved; and the detection method for increasing the particle shape corrected particle size corrects the particle size detection result, and eliminates the detection result difference between the image method and the screening method.
Description
Technical Field
The utility model relates to a fine aggregate quality testing technical field especially relates to a mechanism sand quality testing equipment.
Background
With the vigorous development of the basic construction in China, the demand of the building sand is increased day by day, and due to the limitation of the development of the natural sand, the machine-made sand replaces the natural sand to be a necessary trend. However, due to the defects of the manufacturing process and the base material, the production quality of the machine-made sand is uneven and cannot be randomly put into use, so that equipment is inevitably needed for monitoring the form and quality of the machine-made sand, and the quality monitoring is high in required precision and speed.
Particle size and particle shape are two important control parameters for machine-made sand. The particle size and the particle shape of the machine-made sand can be obtained by detecting the machine-made sand by adopting an image method, the particle size of the machine-made sand can only be obtained by using a screening method for detection, and meanwhile, the screening method has the defects of low measurement efficiency and incapability of on-line monitoring, so that the image method is a necessary trend for machine-made sand detection instead of the screening method. However, because the detection modes of the image method and the screening method are different, and the particle shapes of the machine-made sand particles are different, the detection results of the two particle size detection modes are different, the image method is used for completely replacing the screening method to measure the machine-made sand particles, and the detection result difference of the two detection methods needs to be eliminated.
The existing on-line detection equipment for the granularity and the grain shape of machine-made sand based on an image method is lack of a pretreatment process for the machine-made sand, so that dust and bonding machine-made sand easily enter an image acquisition area to obtain an unreliable image; the previous detection equipment ignores that the mechanism sand falling range is outside the focal length of the camera, so that the acquired image is fuzzy, an unreliable image is easily obtained, and the detection result has deviation.
SUMMERY OF THE UTILITY MODEL
The utility model provides a mechanism sand quality testing equipment, it has overcome the not enough that mechanism sand quality testing exists among the background art.
The utility model provides an adopted technical scheme of its technical problem is:
a machine-made sand quality detection device comprises a frame, wherein a feed inlet, a water content detection device, a sample introduction device, a powder content detection device, a dispersion device, an image acquisition device, an image analysis device and a recovery device are arranged on the frame; the feeding hole is formed in the top of the frame and used for throwing machine-made sand; the water content detection device is positioned below the feeding hole, and the machine-made sand passing through the feeding hole is fed into the water content detection device; the sample introduction device is positioned below the water content detection device and is connected with the powder content detection device, and the machine-made sand is sent into the powder content detection device from the water content detection device through the sample introduction device; the image acquisition device comprises a shading box, a backlight source, an image acquisition area and an imaging device, wherein the backlight source, the image acquisition area and the imaging device are all positioned in the shading box, and the backlight source and the imaging device are positioned at two sides of the image acquisition area; the dispersing device is connected with the powder content detecting device and the image acquisition device so that the machine-made sand is sent to the image acquisition area from the powder content detecting device through the dispersing device and is positioned between the backlight source and the imaging device; the image analysis device is connected with the imaging device; a reclamation device is positioned below the image capture area to reclaim the machine sand.
In one embodiment: the water content detection device comprises a first turnover device, a first weighing device and a drying device; the first overturning device is arranged on the frame, the first weighing device is connected to the first overturning device, the drying device is fixedly connected to the first weighing device through a rod piece, the first weighing device and the drying device can be driven to overturn through the first overturning device, the drying device can be located right below the feeding hole, and machine-made sand in the drying device can be poured into the sample feeding device; the first weighing device can weigh the weight of the sand produced in the drying device in real time.
In one embodiment: the drying equipment comprises a cylinder with an opening on one end face, a heating unit with a heating function is arranged in the cylinder, and the cylinder is used for temporary storage and drying machine-made sand.
In one embodiment: the powder content detection device comprises a dust collector, a dust collection hose and a Y-shaped pipe; the Y-shaped pipe is provided with two open ends and a common end, the two open ends are arranged upwards, the common end is arranged downwards, the common end is connected with the dispersing device and communicated with the dispersing device, one open end is connected to the dust collector through the dust collection hose, the other open end is communicated with the sample injection device to introduce the mechanism sand, and the dust collector sucks the stone powder in the mechanism sand in the falling process.
In one embodiment: the powder content detection device also comprises a second weighing device, a temporary storage box and a second turnover device, wherein the second turnover device is connected to the rack, the second weighing device is connected to the second turnover device, the temporary storage box is fixedly arranged on the second weighing device, the second weighing device and the temporary storage box can be driven to turn over through the second turnover device, the temporary storage box can be positioned under the image acquisition area, and machine-made sand in the temporary storage box can be poured into the recovery device; and the second weighing equipment is used for weighing the machine-made sand in the temporary storage box in real time.
In one embodiment: the recovery device is a recovery box for temporarily storing the machine-made sand, and the recovery box is positioned below the temporary storage box.
In one embodiment: the sampling device comprises a feeding funnel and a vibrating hopper, the feeding funnel is arranged above the vibrating hopper, an opening of the vibrating hopper faces to the powder content detection device, and the vibrating stub bar is connected with the powder content detection device.
In one embodiment: the dispersing device comprises a dispersing pipe and a plurality of baffle plates, the baffle plates are divided into two rows, the two rows of baffle plates are fixedly connected to the inner wall of the dispersing pipe and are oppositely arranged from left to right, the left row of baffle plates and the right row of baffle plates are staggered from top to bottom, the top surfaces of the baffle plates are obliquely arranged in the dispersing pipe along the height direction, the oblique directions of the left row of baffle plates and the right row of baffle plates are opposite, the baffle plates enable the machine-made sand to move in an accelerating mode under the action of gravity, and the machine-made sand is dispersed through collision between the machine-made sand and the wall of the dispersing pipe and mutual collision between the machine-made.
Compared with the background technology, the technical scheme has the following advantages:
compared with a traditional machine-made sand grain size and shape detection device based on an image method, the machine-made sand grain size and shape detection device is additionally provided with a water content measuring device and a powder content measuring device, and machine-made sand is preprocessed before an image is collected, so that the reliability of the image is improved; and the detection method for increasing the particle shape corrected particle size corrects the particle size detection result, and eliminates the detection result difference between the image method and the screening method.
And secondly, drying equipment is added, and the measurement precision is improved.
And the powder content detection device comprises a dust collector, a dust collection hose and a Y-shaped pipe, and dust is absorbed by the Y-shaped pipe and the dust collector, so that the influence of the dust is eliminated, and the measurement precision is improved.
And fourthly, the sampling device comprises a feeding hopper and a vibration hopper, and the dispersion machine is used for producing sand, so that the measurement precision is improved.
And fifthly, the dispersing device comprises a dispersing pipe and a plurality of baffle plates, so that the machine-made sand is further dispersed, and the measurement precision is improved.
Drawings
The present invention will be further described with reference to the accompanying drawings and the following detailed description.
FIG. 1 is a schematic structural diagram of a machine-made sand quality detection apparatus according to the present embodiment;
FIG. 2 is a schematic structural view of the water content detecting apparatus according to the present embodiment;
FIG. 3 is a schematic structural view of a dispersion pipe according to the present embodiment;
FIG. 4 is a schematic view of the image capturing area according to the present embodiment;
FIG. 5 is a flowchart of obtaining a modified relation by pre-experiment according to the present embodiment;
FIG. 6 is a flow chart of machine-made sand detection using particle shape to correct particle size in this embodiment;
FIG. 7 is a schematic front view of an acquisition area according to this embodiment;
description of the main reference numerals: 10-a feed inlet, 20-a first turnover device, 21-a first weighing device, 22-a drying device, 23-a second hopper, 31-a feed hopper, 32-a vibration hopper, 41-a dust collector, 42-a Y-shaped pipe, 43-a second weighing device, 44-a temporary storage box, 45-a second turnover device, 50-a dispersing device, 60-an image acquisition area, 70-an image analysis device and 80-a recovery box.
Detailed Description
In order to realize online detection of various parameters of machine-made sand and improve the precision of detecting the machine-made sand by an image method, the embodiment provides a machine-made sand quality detection device, as shown in fig. 1, which comprises a frame, wherein the frame is provided with a feed inlet 10, a water content detection device, a sample introduction device, a powder content detection device, a dispersion device, an image device and a recovery device 80; the image device in this embodiment includes an image capturing device and an image analyzing device, and the image analyzing device is disposed in the host computer 70.
The feed inlet 10 is arranged at the top of the frame and used for feeding machine-made sand. The feeding hole 10 feeds the fed machine-made sand into a water content detection device, the machine-made sand is fed into a powder content detection device after passing through a sample feeding device, the machine-made sand is fed into an image acquisition area of an image acquisition device after being dispersed by a dispersing device, an image analysis device performs characteristic extraction on an image acquired by the image acquisition device to obtain characteristic parameters of the machine-made sand, the characteristic parameters are corrected by using a correction model for correcting particle size in a particle shape, and the recovery device 80 recovers the machine-made sand after detection.
As shown in fig. 1 and 2, the feeding hole 10 is disposed at the top of the frame, and is shaped like a funnel, so that the thrown machine-made sand falls into the moisture content detection device. The water content detection device comprises a first overturning device 20, a first weighing device 21 and a drying device 22, wherein the first overturning device 20 is arranged on the machine frame, the first weighing device 21 is arranged on the first overturning device 20, and the drying device 22 is fixed on the right side of the first weighing device 21 through a rod piece, so that the drying device is positioned under the feeding hole. The drying device 22 is a cylinder with an open end face, and is provided with a heating unit with a heating function for temporary storage and drying of the machine-made sand. If the first turnover device comprises a fixed part and a rotating part, the fixed part is fixedly connected with the frame, the rotating part can be rotatably connected with the fixed part, and a driving mechanism is additionally arranged to be in transmission connection with the rotating part so as to drive the rotating part to rotate, so that the drying device 22 is driven to turn over, and the opening of the cylinder is aligned with the feeding hole, or the machine-made sand is poured into the second hopper 23.
The sample feeding device comprises a feeding funnel 31 and a vibrating hopper 32, the feeding funnel is arranged above the vibrating hopper, and an opening of the vibrating hopper faces to the powder content detection device; according to the requirement, a second hopper 23 is additionally arranged between the drying equipment 22 and the feeding hopper 31 which are arranged at intervals up and down, so that the machine-made sand in the cylinder body falls into the feeding hopper 31 through the second hopper 23 and falls into the vibration hopper 32.
The powder content detection device comprises a dust collector 41, a dust collection hose 42, a Y-shaped pipe 43, a second weighing device 44, a temporary storage box 45 and a second overturning device 46. The vacuum cleaner 41 is fixed on the frame, the Y-shaped pipe 43 is fixed on the dispersing device, and the second weighing device 44 is positioned below the image acquisition device; the Y-shaped pipe 43 has two open ends and a common end, the two open ends are upward and the common end is downward, one open end is connected to the dust collector 41 through a dust collection hose, the other open end is connected to the vibration hopper to introduce the machine-made sand, and the common end is fixedly connected and communicated with the dispersion pipe of the dispersion device. The second overturning equipment is connected to the rack, the second weighing equipment is connected to the second overturning equipment, the temporary storage box is fixedly arranged on the second weighing equipment, the second weighing equipment and the temporary storage box can be driven to overturn through the second overturning equipment, the temporary storage box can be located right below the image acquisition area, and machine-made sand in the temporary storage box can be poured into the recovery device; and the second weighing equipment is used for weighing the machine-made sand in the temporary storage box in real time.
As shown in fig. 3, the dispersing device 50 includes a dispersing pipe 53 and baffle plates 51, the baffle plates are divided into two rows, the two rows of baffle plates are fixedly connected to the inner wall of the dispersing pipe and are arranged in opposite directions, the two rows of baffle plates are arranged in a vertically staggered manner, the top surfaces of the baffle plates are arranged in the dispersing pipe in an inclined manner along the height direction, the inclined directions of the two rows of baffle plates are opposite, the baffle plates allow the machine-made sand to move in an accelerated manner under the action of gravity, and the machine-made sand is dispersed by collision between the machine-made sand and the pipe wall of the dispersing pipe, mutual collision between the machine-made sand and the machine-made sand, and collision. In this embodiment, the cross-section of the baffle is in a right triangle structure, one right-angle side is fixedly connected to the pipe wall, the other right-angle side is perpendicular to the dispersion pipes, and the inclined side forms the slant.
As shown in fig. 4, the image device 60 includes a light shielding box 63, a backlight 61, an image capturing area, an imaging device 62, and a host 70. The backlight source 61, the image acquisition area and the imaging device 62 are arranged in the shading box 63, the backlight source 61 and the imaging device 62 are positioned on two sides of the image acquisition area, and the machine-made sand is positioned between the backlight source 61 and the imaging device 62. In this embodiment, the lower port of the dispersion pipe 53 is located between the backlight 61 and the imaging device 62, so that the falling machine-made sand is located between the backlight 61 and the imaging device 62; the backlight source 52 adopts an LED backlight lamp, the imaging device is a CCD industrial camera using a USB3.0 interface and is matched with a telecentric lens, and the collected aggregate image is transmitted to a host computer for image processing by using an USB3.0 interface; the periphery of the shading box is sealed and used for resisting the influence of natural light on the shooting effect; the host 70 is disposed outside the light shielding box 63 and connected to the host 70 and the imaging device 62 through a data line, so that the data analysis device of the host 70 analyzes the collected data. A telecentric lens is added to prevent the mechanism sand from falling beyond the focal length of the camera to cause the fuzzy image outline and influence the image processing process.
The embodiment is provided with four types of machine-made sand obtained by crushing granite, the machine-made sand quality detection equipment of the embodiment is adopted to obtain a correction relational expression, and then the correction relational expression is added to an image analysis device to correct a particle size result.
Fig. 5 is a flowchart of obtaining a modified relation through a pre-experiment, where the method of obtaining a modified relation through a pre-experiment includes:
A1) preparing four types of machine-made sand;
A2) screening out four machine-made sand single-stage materials of 0.3-0.6 mm, 0.6-1.18 mm, 1.18-2.36 mm and 2.36-4.75 mm from each type of machine-made sand according to the particle size;
A3) putting a first single-stage material in the first type of machine-made sand into machine-made sand quality detection equipment from a feeding hole to start detection;
A4) the machine-made sand falls into the drying equipment, the first weighing equipment starts weighing, the weight G1 is recorded, meanwhile, an electric signal sent by the first weighing equipment drives the first drying equipment to heat the machine-made sand, the first weighing equipment weighs the machine-made sand once every 60 seconds, when the weight measured for 3 times is not changed continuously, the weight G2 is recorded, and the first overturning equipment overturns to pour the machine-made sand into the feeding hopper; wherein the water content L is (G1-G2)/G2:
A5) the feeding hopper sends the machine-made sand into the vibrating hopper, and the vibrating hopper enables the machine-made sand to continuously slide down on the inclined plane of the vibrating feeder through vibration so as to provide continuous and stable feeding for the Y-shaped pipe;
A6) the machine-made sand falls into the Y-shaped tube and falls down after being vibrated, the vacuum cleaner generates negative pressure suction on the inside of the Y-shaped tube above the Y-shaped tube, machine-made sand powder in the falling process is sucked into the vacuum cleaner, and the machine-made sand with the sand powder removed falls into the dispersion tube from the common end (lower end) of the Y-shaped tube for dispersion;
A7) the dispersing pipe adopts a multi-baffle plate structure design and is used for completely dispersing the machine-made sand and then entering the image acquisition device;
A8) the image acquisition device acquires images.
A9) And (3) image processing is carried out on the acquired image by an image analysis device in the host, the residual machine-made sand enters the second weighing device, the measured weight is G3, the powder content X of the machine-made sand is (G3-G2)/G3, and after the powder content measurement of the machine-made sand is finished, the second overturning device overturns to pour the machine-made sand into the recycling box.
The image processing includes:
B1) converting the GRB image collected by the industrial camera into a gray-scale image, wherein the gray-scale value of each pixel is calculated by the following formula:
Gray＝R×0.299+G×0.587+B×0.114
r, G, B are the values of the three channels of the pixel red, green and blue, respectively, and Gray is the Gray value obtained.
B2) And performing median filtering on the grayed image to eliminate noise caused by rough textures on the surfaces of the bricks and the concrete. In this embodiment, the median filtering replaces each pixel of the image with a median of pixels in a3 × 3 neighborhood (a square region centered on the current pixel).
In this step B2), specifically, the method may include:
copying the image into a slightly larger image, adding a row and a column of pixels on the upper side, the lower side, the left side and the right side of the new image respectively, and copying the nearest row or column in the original image to fill the pixels;
searching each 3 × 3 pixel area in the image from top to bottom from left to right in sequence, and taking a median value of gray values of 9 pixels in the area to replace the gray value of a central pixel in the 3 × 3 area;
after all the areas are operated, deleting the added boundaries to return the image to the original size;
B3) and carrying out binarization processing on the picture by using a maximum inter-class variance method on the filtered image.
In this step B3), the maximum inter-class variance method is as follows:
let t be the segmentation threshold of the foreground (machine-made sand particles) and the background (white backlight), the proportion of the number of foreground pixels in the image is w0, and the average gray level is u 0; the number of background pixels in the image is w1, and the average gray level is u 1.
The average gray scale of the image is: u-w 0 × u0+ w1 × u 1.
Variance of foreground and background images: g-w 0 x (u0-u)2+ w1 x (u1-u) 2-w 0 x w1 x (u0-u1) 2.
The threshold T which maximizes the inter-class variance g is obtained by using a traversal method, and the difference between the foreground and the background at this time can be considered as the maximum.
B4) The contours in contact with the image edges are deleted. Inevitably, some particles may appear at the edge of the field of view in the captured image and are captured only in a portion, such as the upper boundary of the field of view in fig. 7, but these particles are repeatedly captured at the next capture. In order to avoid that the same grain is identified repeatedly, the grain of the image, which is contacted with the boundary, is deleted;
B5) extracting particle outlines;
B6) obtaining the perimeter and the area of the outline of the particle, and calculating the sphericity of the outline by using information extracted from the outline;
wherein: profile sphericity Q, profile area S, profile perimeter L.
The method for calculating the equivalent ellipse Feret minor axis by the sphericity value is as follows: the maximum Feret diameter in the outline is searched and is set as the ellipse major axis b, and the outline area is set as the ellipse area S. The equivalent ellipse Feret minor axis a has a value of S/(pi x b).
The Feret diameter is the distance of two parallel lines tangent to the projected contour on the machined sand image. The equivalent ellipse Feret minor axis of the machine-made sand is the minor axis of the ellipse of which the machine-made sand has the same area and the major axis is equal to the maximum Feret diameter of the machine-made sand.
B7) Counting equivalent elliptical Feret short diameters measured by an image method, if the grain diameter of the single-stage material of the machine-made sand is more than 90%, returning to replace the next batch of machine-made sand and entering a detection device for measurement without correcting the grain diameter; and if the grain diameter ratio of the single-grade material of the machine-made sand is less than or equal to 90%, entering the next step to fit a correction coefficient.
B8) The method for fitting the correction coefficient is to divide the sphericity into 10 grades and classify the particle size according to the corresponding relation between the collected sphericity and the particle size.
B9) And under each sphericity grade, artificially giving each sphericity correction coefficient, and obtaining a sphericity and correction coefficient relation through fitting.
B10) And adding the correction relation to an image analysis device, correcting the particle size result, repeatedly adjusting the correction relation until the particle size ratio of the single-stage material is more than 90%, and then replacing the next machine-made sand to enter a detection device for measurement.
B11) And after obtaining all the correction relational expressions, comparing various machine-made sand types to obtain an optimal relational expression, and determining the optimal relational expression as a grain shape correction relational expression of the machine-made sand. And after the correction relational expression is obtained, adding the correction relational expression into an image analysis device, and correcting the mechanism sand grain diameter detection result.
The granite mixture is put into the machine-made sand quality detection equipment adopting the grain shape to correct the grain size for detection, and the measurement method is shown in figure 6 and comprises the following steps:
C1) putting the sand material into detection equipment through a feed inlet;
C2) measuring the water content of the machine-made sand by a water content detection device, drying the machine-made sand, and feeding the dried machine-made sand into a vibratory feeder;
C3) the vibratory feeder feeds the machine-made sand into a Y-tube to remove stone dust, and the remaining machine-made sand falls into a dispersion tube.
C4) And the machine-made sand enters the image acquisition device after being completely dispersed in the dispersion pipe.
C5) The image acquisition device acquires an image and sends the image to the host for image processing.
The image processing includes:
C51) and converting the GRB image acquired by the industrial camera into a gray scale image.
C52) And performing median filtering on the grayed image.
C53) And carrying out binarization processing on the picture by using a maximum inter-class variance method on the filtered image.
C54) The contours in contact with the image edges are deleted.
C55) And extracting the particle profile.
C56) And obtaining the perimeter and the area of the contour, and calculating the sphericity and the equivalent ellipse Feret minor diameter of the contour by using the information extracted from the contour.
C57) And correcting the particle size of each machine-made sand particle according to the sphericity of the machine-made sand particle to obtain the accurate machine-made sand particle size.
C58) And outputting the proportion result of each granularity range of the machine-made sand.
C6) And the machine-made sand after passing through the image acquisition device enters a second weighing device for weighing, the powder content of the machine-made sand is measured, and then the machine-made sand is turned over to be poured into a recovery device.
The above description is only a preferred embodiment of the present invention, and therefore the scope of the present invention should not be limited by this description, and all equivalent changes and modifications made within the scope and the specification of the present invention should be covered by the present invention.
Claims (8)
1. The utility model provides a mechanism sand quality testing equipment which characterized in that: the device comprises a frame, wherein a feeding hole, a water content detection device, a sample introduction device, a powder content detection device, a dispersing device, an image acquisition device, an image analysis device and a recovery device are arranged on the frame; the feeding hole is formed in the top of the frame and used for throwing machine-made sand; the water content detection device is positioned below the feeding hole, and the machine-made sand passing through the feeding hole is fed into the water content detection device; the sample introduction device is positioned below the water content detection device and is connected with the powder content detection device, and the machine-made sand is sent into the powder content detection device from the water content detection device through the sample introduction device; the image acquisition device comprises a shading box, a backlight source, an image acquisition area and an imaging device, wherein the backlight source, the image acquisition area and the imaging device are all positioned in the shading box, and the backlight source and the imaging device are positioned at two sides of the image acquisition area; the dispersing device is connected with the powder content detecting device and the image acquisition device so that the machine-made sand is sent to the image acquisition area from the powder content detecting device through the dispersing device and is positioned between the backlight source and the imaging device; the image analysis device is connected with the imaging device; a reclamation device is positioned below the image capture area to reclaim the machine sand.
2. The machine-made sand quality detection device of claim 1, wherein: the water content detection device comprises a first turnover device, a first weighing device and a drying device; the first overturning device is arranged on the frame, the first weighing device is connected to the first overturning device, the drying device is fixedly connected to the first weighing device through a rod piece, the first weighing device and the drying device can be driven to overturn through the first overturning device, the drying device can be located right below the feeding hole, and machine-made sand in the drying device can be poured into the sample feeding device; the first weighing device can weigh the weight of the sand produced in the drying device in real time.
3. The machine-made sand quality detection device of claim 2, wherein: the drying equipment comprises a cylinder with an opening on one end face, a heating unit with a heating function is arranged in the cylinder, and the cylinder is used for temporary storage and drying machine-made sand.
4. The machine-made sand quality detection device of claim 2, wherein: the powder content detection device comprises a dust collector, a dust collection hose and a Y-shaped pipe; the Y-shaped pipe is provided with two open ends and a common end, the two open ends are arranged upwards, the common end is arranged downwards, the common end is connected with the dispersing device and communicated with the dispersing device, one open end is connected to the dust collector through the dust collection hose, the other open end is communicated with the sample injection device to introduce the mechanism sand, and the dust collector sucks the stone powder in the mechanism sand in the falling process.
5. The machine-made sand quality detection device of claim 4, wherein: the powder content detection device also comprises a second weighing device, a temporary storage box and a second turnover device, wherein the second turnover device is connected to the rack, the second weighing device is connected to the second turnover device, the temporary storage box is fixedly arranged on the second weighing device, the second weighing device and the temporary storage box can be driven to turn over through the second turnover device, the temporary storage box can be positioned under the image acquisition area, and machine-made sand in the temporary storage box can be poured into the recovery device; and the second weighing equipment is used for weighing the machine-made sand in the temporary storage box in real time.
6. The machine-made sand quality detection device of claim 5, wherein: the recovery device is a recovery box for temporarily storing the machine-made sand, and the recovery box is positioned below the temporary storage box.
7. The machine-made sand quality detecting apparatus according to any one of claims 1 to 6, wherein: the sampling device comprises a feeding funnel and a vibrating hopper, the feeding funnel is arranged above the vibrating hopper, an opening of the vibrating hopper faces to the powder content detection device, and the vibrating stub bar is connected with the powder content detection device.
8. The machine-made sand quality detecting apparatus according to any one of claims 1 to 6, wherein: the dispersing device comprises a dispersing pipe and a plurality of baffle plates, the baffle plates are divided into two rows, the two rows of baffle plates are fixedly connected to the inner wall of the dispersing pipe and are oppositely arranged from left to right, the left row of baffle plates and the right row of baffle plates are staggered from top to bottom, the top surfaces of the baffle plates are obliquely arranged in the dispersing pipe along the height direction, the oblique directions of the left row of baffle plates and the right row of baffle plates are opposite, the baffle plates enable the machine-made sand to move in an accelerating mode under the action of gravity, and the machine-made sand is dispersed through collision between the machine-made sand and the wall of the dispersing pipe and mutual collision between the machine-made.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110068518A (en) * | 2019-05-10 | 2019-07-30 | 华侨大学 | Machine-made Sand quality detection apparatus and its detection method |
| CN114371106A (en) * | 2022-01-07 | 2022-04-19 | 苏州混凝土水泥制品研究院有限公司 | Method for testing and analyzing morphology parameters of machine-made sand |
| CN114972166A (en) * | 2022-03-24 | 2022-08-30 | 中国电建集团华东勘测设计研究院有限公司 | Aggregate grading data statistical method based on visual inspection image |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110068518A (en) * | 2019-05-10 | 2019-07-30 | 华侨大学 | Machine-made Sand quality detection apparatus and its detection method |
| CN114371106A (en) * | 2022-01-07 | 2022-04-19 | 苏州混凝土水泥制品研究院有限公司 | Method for testing and analyzing morphology parameters of machine-made sand |
| CN114972166A (en) * | 2022-03-24 | 2022-08-30 | 中国电建集团华东勘测设计研究院有限公司 | Aggregate grading data statistical method based on visual inspection image |
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