Aggregate detection system

Abstract

The invention discloses an aggregate detection system which comprises a first conveying belt connected with an aggregate production line and used for receiving aggregate at an interface with the aggregate production line; one end of the second conveying belt is connected with the first conveying belt, and the second conveying belt is used for receiving the aggregate conveyed from the first conveying belt and flatly laying and separating the received aggregate on the surface of the second conveying belt; and the main detection equipment is connected with the other end of the second conveying belt, and is used for identifying and detecting the aggregate conveyed by the second conveying belt, and calculating to obtain the particle size distribution and the needle-sheet proportion of the aggregate.

Description

Technical Field

[0001] This invention belongs to the field of building material testing technology, and specifically relates to an aggregate testing system. Background Technology

[0002] Aggregates play a skeletal supporting role in concrete, and different aggregate gradations result in better volume stability and durability of the final concrete. Current aggregate grading and needle-like / flaky particle detection methods rely on sieving and weighing. First, the aggregates are sieved using a sieve. Then, each grade of aggregate is weighed, and the particle size distribution is calculated based on the weight percentage. Simultaneously, each aggregate within each grade is sieved for needle-like / flaky particles using a graduated sieve, and the percentage of needle-like / flaky particles is calculated by weighing after sieving. Summary of the Invention

[0003] One embodiment of the present invention is a coarse aggregate detection system. It includes:

[0004] The first conveyor belt is connected to the aggregate production line and is used to receive aggregate at the interface with the aggregate production line.

[0005] The main inspection equipment is used to identify and detect the aggregate, and calculate the particle size distribution and the proportion of needle-like and flaky particles in the aggregate.

[0006] A second conveyor belt, one end of which is connected to the first conveyor belt, is used to receive aggregate conveyed from the first conveyor belt and spread the received aggregate evenly on the surface of the second conveyor belt.

[0007] The main inspection equipment is connected to the other end of the second conveyor belt and is used to identify and inspect the aggregates conveyed by the second conveyor belt.

[0008] The return material equipment is used to transport aggregates that have been identified and inspected by the main inspection equipment back to the aggregate production line.

[0009] The beneficial effect of this invention is that it realizes an aggregate grading and needle-like / flaky detection system. Attached Figure Description

[0010] The above and other objects, features, and advantages of exemplary embodiments of the present invention will become readily apparent from the following detailed description taken in conjunction with the accompanying drawings. Several embodiments of the invention are illustrated in the drawings by way of example and not limitation, wherein:

[0011] Figure 1 A schematic diagram of an aggregate detection system according to one embodiment of the present invention. Detailed Implementation

[0012] The specific operation of the screening and weighing method involves stopping the production line, cutting off a section of aggregate from the production line, putting the aggregate into a screening machine, screening for at least 10 minutes, taking out each grade, weighing each grade separately, and taking out suspected needle-like and flaky aggregates from each grade separately, placing them on a scale instrument for confirmation of needle-like and flaky appearance, weighing the confirmed needle-like and flaky aggregates separately, and finally calculating the particle size distribution and the proportion of needle-like and flaky aggregates by computer.

[0013] This method is time-consuming and labor-intensive, and stopping the production line will have a significant impact on production. At the same time, the test results are also relatively delayed. Often, by the time the non-conforming aggregate is detected, a batch of aggregate has already been produced, resulting in a great waste of raw materials. Furthermore, this method is even more time-consuming and labor-intensive when testing for the percentage of needle-like particles, as it requires comparing each aggregate particle from each grade on a calibration instrument, which consumes a lot of time.

[0014] What's even more difficult to solve is that this sieving and weighing method has certain limitations on the amount of material tested at one time. If the amount is large at one time, it will accumulate on a certain layer of screens, resulting in inaccurate sieving results and consequently inaccurate aggregate particle size distribution.

[0015] To overcome the problems of traditional screening and weighing methods requiring production line shutdown for material removal and time-consuming and labor-intensive testing, this disclosure adopts machine vision to classify aggregates, performs online sampling of aggregates, and calculates aggregate particle size distribution in real time.

[0016] According to one or more embodiments, an aggregate detection system, such as Figure 1 As shown, the working steps of this detection system include:

[0017] 1. The material is received at the original production line interface via belt 1;

[0018] 2. The aggregate is leveled and separated between conveyor belt 2 and the main inspection equipment;

[0019] 3. Collect data on incoming materials in the main inspection equipment and transmit the data to the software for processing and display;

[0020] 4. After passing through the main inspection equipment, the aggregate is conveyed to the return material equipment to return it to the original production line. According to m=ρ*V, the density of aggregates in the same batch is basically the same, so the volume can be used to replace the mass. Each aggregate is calculated separately. As long as the calculated volume is correct, a nearly accurate particle size distribution can be obtained.

[0021] Machine vision is used to obtain the three-dimensional information of each aggregate. Based on this information, the length, width, and height of the aggregate are calculated to determine its particle size and volume. The aggregate volume is then used instead of traditional weighing to calculate the final particle size distribution and whether it is needle-like or flaky. Simultaneously, online detection serves as a safety monitoring tool. If a large number of oversized aggregates are detected, the system is alerted to stop production and the equipment is inspected.

[0022] According to one or more embodiments, an aggregate testing system includes the following testing steps:

[0023] 1. Take a sample at the end of the production line conveyor belt and cut off a section of aggregate;

[0024] 2. The aggregate is dispersed by a conveying device and fed into the testing device;

[0025] 3. The detection device collects data from the dispersed aggregates using a camera;

[0026] 4. Analyze and process the data in the software;

[0027] 5. The processed aggregate is transported back to the conveyor belt on the production line via an elevator.

[0028] Actual verification at the project site showed that the aggregate testing method of the aggregate testing system of this invention has a consistency of over 95% compared with the traditional screening and weighing method. At the same time, it greatly saves testing time and eliminates the need to stop the machine for sampling, thus saving a lot of invalid time that would otherwise be spent stopping production and restarting.

[0029] It is worth noting that although the spirit and principles of this invention have been described with reference to several specific embodiments, it should be understood that this invention is not limited to the disclosed specific embodiments, and the division of aspects does not imply that the features in these aspects cannot be combined; such division is merely for the convenience of description. This invention is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. An aggregate detection system, characterized by, include, The first conveyor belt is connected to the aggregate production line and is used to receive aggregate at the interface with the aggregate production line. The main inspection equipment is used to identify and detect the aggregate, and calculate the particle size distribution and the proportion of needle-like and flaky particles in the aggregate.

2. The aggregate detection system of claim 1, wherein, It also includes, A second conveyor belt, one end of which is connected to the first conveyor belt, is used to receive aggregate conveyed from the first conveyor belt and spread the received aggregate evenly on the surface of the second conveyor belt. The main inspection equipment is connected to the other end of the second conveyor belt and is used to identify and inspect the aggregates conveyed by the second conveyor belt.

3. The aggregate detection system according to claim 2, characterized in that, It also includes, The return material equipment is used to transport aggregates that have been identified and inspected by the main inspection equipment back to the aggregate production line.

4. The aggregate detection system according to claim 1, characterized in that, The main inspection equipment acquires aggregate images, obtains three-dimensional data of each aggregate through machine vision, calculates the length, width, and height of the aggregate based on the obtained three-dimensional data, then calculates the aggregate particle size and volume, and calculates the aggregate particle size distribution and the proportion of needle-like and flaky particles based on the aggregate volume.

5. The aggregate detection system according to claim 3, characterized in that, The detection steps of this detection system include: At the end of the aggregate production line, a section of aggregate is intercepted and sampled via the first conveyor belt. The aggregate is dispersed and fed into the main inspection equipment via a second conveyor belt; The main inspection equipment collects data from the dispersed aggregates using a camera; The obtained data is analyzed and processed; The aggregate output from the main inspection equipment is transported back to the aggregate production line via the return material equipment.

6. The aggregate detection system according to claim 5, characterized in that, The material return equipment is an elevator.

Images