Rock lumpness identification method and system based on photoacoustic spectroscopy

Abstract

The rock lumpness recognition method and system based on photoacoustic spectrum are disclosed, which comprises a conveying belt, a plurality of partitions are fixedly arranged on the upper end of the conveying belt, further comprises a collecting assembly located above the conveying belt, the collecting assembly is used for collecting the lumpness information above and around the rock located between the adjacent two partitions; the collecting assembly comprises a mounting disc, a ring-shaped second track and a first track communicated with the second track are opened on the mounting disc, the first track is distributed along the radial direction of the second track, further comprises a driving motor which can displace in the first track and the second track, an output shaft fixedly arranged with a fixed column is arranged at the lower end of the driving motor, an angle-adjustable spectrum module is fixedly arranged at the lower end of the fixed column, a shunt plate is further arranged at the connection between the first track and the second track. The present application has the advantages of high recognition accuracy and efficiency.

Description

Technical Field

[0001] This invention relates to the field of rock block size identification technology, and in particular to a method and system for rock block size identification based on photoacoustic spectroscopy. Background Technology

[0002] To study the effects of blasting, it is sometimes necessary to statistically analyze the size of the rock fragments after blasting. Existing methods for analyzing rock fragment size mainly involve sieving the rock fragments using sieves and then characterizing the size based on the weight of the fragments passing through sieves of different apertures. This method is time-consuming and labor-intensive. Therefore, improving the efficiency of rock fragment size identification is the technical problem that this application aims to solve. Summary of the Invention

[0003] Based on the technical problems existing in the background technology, the present invention proposes a method and system for identifying rock block size based on photoacoustic spectroscopy, which has the advantages of high identification accuracy and efficiency.

[0004] The rock block size identification system based on photoacoustic spectroscopy proposed in this invention includes a conveyor belt with several partitions fixedly installed at the upper end of the conveyor belt, and a collection component located above the conveyor belt. The collection component is used to collect block size information of the rock above and around the rock located between two adjacent partitions.

[0005] Preferably, the acquisition component includes a mounting plate with an annular second track and a first track communicating with the second track. The first track is radially distributed along the second track. It also includes a drive motor that can move within the first and second tracks. A fixing post is fixedly installed on the output shaft at the lower end of the drive motor. An adjustable-angle spectral module is fixedly installed at the lower end of the fixing post. A splitter plate is also provided at the connection between the first track and the second track. One end of the splitter plate is hinged to the inner circumference of the second track, and the other end of the splitter plate can rotate around the hinge so that when the drive motor rotates in the forward direction, it can enter the second track from the first track, and when the drive motor rotates in the reverse direction, it can enter the first track from the second track.

[0006] Preferably, the spectral module includes an adjustment plate disposed at the lower end of the fixed column, the adjustment plate and the fixed column forming an adjustment cavity, one end of the adjustment plate being hinged to the fixed column, and the other end of the adjustment plate being provided with a push rod, the two ends of the push rod being hinged to the fixed column and the adjustment plate respectively, and a light source, a monochromator and a reflector being sequentially disposed at the end of the adjustment plate near the adjustment cavity, and a lens being disposed through the adjustment plate, the light reflected by the reflector being perpendicular to the lens on the adjustment plate.

[0007] Preferably, the system further includes a height-adjustable adjustment column connected to the fixed column. The spectral module includes an adjustment plate disposed at the lower end of the adjustment column. An adjustment cavity is formed between the adjustment plate and the adjustment column. One end of the adjustment plate is hinged to the adjustment column, and a push rod is disposed at the other end of the adjustment plate. The two ends of the push rod are respectively hinged to the adjustment column and the adjustment plate. A light source, a monochromator, and a reflector are also disposed sequentially at the end of the adjustment plate near the adjustment cavity. A lens is also disposed through the adjustment plate, and the light reflected by the reflector is perpendicular to the lens on the adjustment plate.

[0008] Preferably, the angle of rotation of the adjusting plate is 30-60°.

[0009] Preferably, the inner diameter of the second track is greater than the distance between the partitions on both sides of the rock.

[0010] The identification method of the rock block size identification system based on photoacoustic spectroscopy proposed in this invention includes the following steps:

[0011] S1: Place the rocks spaced between two adjacent partitions on the conveyor belt;

[0012] S2: When the rock between the partitions is conveyed to the area directly below the acquisition component, the conveyor belt stops moving, and the acquisition component collects photoacoustic signals from the rock.

[0013] S3: Analyze the acquired photoacoustic signals to determine the size of the rock blocks.

[0014] Preferably, before identification, photoacoustic signals of different rock block sizes are collected and a database is formed. When identifying rock block sizes, the collected photoacoustic signals are compared with the information in the database to determine the specific size of the rock block.

[0015] Preferably, the photoacoustic signal collected in S2 is transmitted to an amplifier via a microphone, and then transmitted to a computer for analysis.

[0016] Preferably, the height of the acquisition component relative to the conveyor belt is adjustable.

[0017] Beneficial technical effects:

[0018] (1) The acquisition component of this application can acquire block size information above and around the rock, which improves the accuracy of rock block size identification. In addition, a database based on photoacoustic signals is formed before rock block size identification. When identification is performed, the acquired photoacoustic signals are compared with the signals in the database, thereby improving the accuracy of block size identification while solving the identification time problem.

[0019] (2) The acquisition component of this application specifically includes an installation plate with a first track and a second track. When the drive motor runs in the first track, the adjustment plate is in a horizontal state. When the drive motor runs to the second track, the push rod controls the adjustment plate to rotate, thereby realizing the acquisition of information around the rock. This application only needs one acquisition component to realize the acquisition of information above and around the rock, saving costs. Moreover, the operation method is simple and convenient, and has a high degree of automation. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the rock block size identification system based on photoacoustic spectroscopy proposed in this invention;

[0021] Figure 2 This is a top view of the acquisition component proposed in this invention;

[0022] Figure 3 This is a cross-sectional view of the acquisition component proposed in this invention;

[0023] Figure 4 This is a partial AA magnified view of the acquisition component proposed in this invention;

[0024] Figure 5 This is a schematic diagram of the structure of the adjusting plate after rotation proposed in this invention.

[0025] In the diagram: 1-conveyor belt, 2-partition plate, 3-acquisition component, 4-mounting plate, 5-drive motor, 6-first track, 7-diverter plate, 8-second track, 9-fixed column, 10-lens, 11-adjustment cavity, 12-adjustment column, 13-push rod, 14-reflector, 15-adjustment plate, 16-light source, 17-monochromator. Detailed Implementation

[0026] Example 1

[0027] Reference Figure 1-5 The rock block size identification system based on photoacoustic spectroscopy proposed in this invention includes a conveyor belt 1, with several partitions 2 fixedly installed at the upper end of the conveyor belt 1, and also includes a collection component 3 located above the conveyor belt 1. The collection component 3 is used to collect block size information of the rock above and around the rock located between two adjacent partitions 2.

[0028] Specifically, the acquisition component 3 includes a mounting plate 4, on which a second annular track 8 and a first track 6 communicating with the second track 8 are opened. The first track 6 is radially distributed along the second track 8. It also includes a drive motor 5 that can be displaced within the first track 6 and the second track 8. A fixing post 9 is fixedly installed on the output shaft at the lower end of the drive motor 5. An adjustable angle spectral module is fixedly installed at the lower end of the fixing post 9. A splitter plate 7 is also provided at the connection between the first track 6 and the second track 8. One end of the splitter plate 7 is hinged to the inner circumference of the second track 8. The other end of the splitter plate 7 can rotate around the hinge so that when the drive motor 5 rotates in the forward direction, it can enter the second track 8 from the first track 6, and when the drive motor 5 rotates in the reverse direction, it can enter the first track 6 from the second track 8.

[0029] Specifically, the spectral module includes an adjustment plate 15 disposed at the lower end of the fixed column 9. The adjustment plate 15 and the fixed column 9 form an adjustment cavity 11. One end of the adjustment plate 15 is hinged to the fixed column 9, and the other end of the adjustment plate 15 is provided with a push rod 13. The two ends of the push rod 13 are respectively hinged to the fixed column 9 and the adjustment plate 15. A light source 16, a monochromator 17 and a reflector 14 are also sequentially disposed at the end of the adjustment plate 15 near the adjustment cavity 11. A lens 10 is also disposed through the adjustment plate 15. The light reflected by the reflector 14 is perpendicular to the lens 10 on the adjustment plate 15.

[0030] Specifically, the angle of rotation of the adjusting plate 15 is 30-60°, preferably 45°.

[0031] The inner diameter of the second track 8 is greater than the distance between the two side partitions 2 of the rock.

[0032] Example 2

[0033] Reference Figure 1-5 The rock block size identification system based on photoacoustic spectroscopy proposed in this invention includes a conveyor belt 1, with several partitions 2 fixedly installed at the upper end of the conveyor belt 1, and also includes a collection component 3 located above the conveyor belt 1. The collection component 3 is used to collect block size information of the rock above and around the rock located between two adjacent partitions 2.

[0034] Specifically, the acquisition component 3 includes a mounting plate 4, on which a second annular track 8 and a first track 6 communicating with the second track 8 are opened. The first track 6 is radially distributed along the second track 8. It also includes a drive motor 5 that can be displaced within the first track 6 and the second track 8. A fixing post 9 is fixedly installed on the output shaft at the lower end of the drive motor 5. An adjustable angle spectral module is fixedly installed at the lower end of the fixing post 9. A splitter plate 7 is also provided at the connection between the first track 6 and the second track 8. One end of the splitter plate 7 is hinged to the inner circumference of the second track 8. The other end of the splitter plate 7 can rotate around the hinge so that when the drive motor 5 rotates in the forward direction, it can enter the second track 8 from the first track 6, and when the drive motor 5 rotates in the reverse direction, it can enter the first track 6 from the second track 8.

[0035] It also includes an adjustable column 12 with adjustable height connected to the fixed column 9. The spectral module includes an adjustment plate 15 disposed at the lower end of the adjustment column 12. The adjustment plate 15 and the adjustment column 12 form an adjustment cavity 11. One end of the adjustment plate 15 is hinged to the adjustment column 12, and the other end of the adjustment plate 15 is provided with a push rod 13. The two ends of the push rod 13 are respectively hinged to the adjustment column 12 and the adjustment plate 15. A light source 16, a monochromator 17 and a reflector 14 are also arranged in sequence at the end of the adjustment plate 15 near the adjustment cavity 11. A lens 10 is also disposed through the adjustment plate 15. The light reflected by the reflector 14 is perpendicular to the lens 10 on the adjustment plate 15.

[0036] Specifically, the angle of rotation of the adjusting plate 15 is 30-60°, preferably 45°.

[0037] In order to enable the acquisition component 3 to achieve full coverage of rock identification, the inner diameter of the second track 8 is larger than the distance between the partitions 2 on both sides of the rock.

[0038] The acquisition component of this application specifically includes an installation plate with a first track and a second track. When the drive motor runs in the first track, the adjustment plate is in a horizontal state. When the drive motor runs to the second track, the push rod controls the adjustment plate to rotate, thereby realizing the acquisition of information around the rock. This application only requires one acquisition component to realize the acquisition of information above and around the rock, saving costs. Moreover, the operation method is simple and convenient, and has a high degree of automation.

[0039] For embodiments 1 and 2, the workflow of the acquisition component is as follows: When the rock between the partitions is directly below the acquisition component, the acquisition component begins to acquire the photoacoustic signal from the rock. The drive motor controls the fixed column to move along the first track to the second track. At this time, the push rod rotates the adjusting plate to a certain angle, allowing the drive motor to acquire information around the rock while running in the second track. The drive motor rotates at least one revolution along the second track. Then, the drive motor is reversed. Due to the presence of the diverter plate, when the drive motor reaches the connection between the first and second tracks, it cannot continue rotating along the second track and instead directly enters the first track. When it reaches directly above the rock, the drive motor stops working, and the push rod resets, bringing the adjusting plate to a horizontal position. At this point, the conveyor belt can be controlled to transport the next rock pile directly below the acquisition component. The movement of the drive motor within the first and second tracks can be achieved using existing technologies, such as gear meshing. Furthermore, the microphones and amplifiers used to receive the photoacoustic signal are not shown in the figures; these can be achieved using existing technologies.

[0040] Example 3

[0041] The identification method of the rock block size identification system based on photoacoustic spectroscopy proposed in this invention includes the following steps:

[0042] S1: Place the rocks spaced between two adjacent partitions on the conveyor belt;

[0043] S2: When the rock between the partitions is conveyed to the area directly below the acquisition component, the conveyor belt stops moving, and the acquisition component collects photoacoustic signals from the rock.

[0044] S3: Analyze the acquired photoacoustic signals to determine the size of the rock blocks.

[0045] Preferably, before identification, photoacoustic signals of different rock block sizes are collected and a database is formed. When identifying rock block sizes, the collected photoacoustic signals are compared with the information in the database to determine the specific size of the rock block.

[0046] Preferably, the photoacoustic signal collected in S2 is transmitted to an amplifier via a microphone, and then transmitted to a computer for analysis.

[0047] Preferably, the height of the acquisition component relative to the conveyor belt is adjustable.

[0048] The acquisition component of this application can acquire block size information above and around the rock, improving the accuracy of rock block size identification. In addition, a database based on photoacoustic signals is first formed before rock block size identification. During identification, the acquired photoacoustic signals are compared with the signals in the database, thereby improving the accuracy of block size identification while solving the identification time problem.

[0049] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A rock block size identification system based on photoacoustic spectroscopy, characterized in that, It includes a conveyor belt, with several partitions fixedly installed at the upper end of the conveyor belt, and also includes a collection component located above the conveyor belt, which is used to collect block size information of the rock above and around the rock located between two adjacent partitions; The acquisition component includes a mounting plate with a second annular track and a first track connected to the second track. The first track is radially distributed along the second track. It also includes a drive motor that can move within the first and second tracks. A fixing post is fixedly installed on the output shaft at the lower end of the drive motor. An adjustable-angle spectral module is fixedly installed at the lower end of the fixing post. A splitter plate is also provided at the connection between the first track and the second track. One end of the splitter plate is hinged to the inner circumference of the second track, and the other end of the splitter plate can rotate around the hinge so that when the drive motor rotates in the forward direction, it can enter the second track from the first track, and when the drive motor rotates in the reverse direction, it can enter the first track from the second track. The spectral module includes an adjustment plate disposed at the lower end of a fixed column, and an adjustment cavity is formed between the adjustment plate and the fixed column. One end of the adjustment plate is hinged to the fixed column, and a push rod is disposed at the other end of the adjustment plate. The two ends of the push rod are respectively hinged to the fixed column and the adjustment plate. A light source, a monochromator and a reflector are also disposed in sequence at the end of the adjustment plate near the adjustment cavity. A lens is also disposed through the adjustment plate, and the light reflected by the reflector is perpendicular to the lens on the adjustment plate. It also includes a height-adjustable adjustment column connected to the fixed column. The spectral module includes an adjustment plate disposed at the lower end of the adjustment column. An adjustment cavity is formed between the adjustment plate and the adjustment column. One end of the adjustment plate is hinged to the adjustment column, and a push rod is disposed at the other end of the adjustment plate. The two ends of the push rod are respectively hinged to the adjustment column and the adjustment plate. A light source, a monochromator, and a reflector are also disposed sequentially at the end of the adjustment plate near the adjustment cavity. A lens is also disposed through the adjustment plate, and the light reflected by the reflector is perpendicular to the lens on the adjustment plate.

2. The rock block size identification system based on photoacoustic spectroscopy according to claim 1, characterized in that, The adjustment plate can rotate at an angle of 30-60°.

3. The rock block size identification system based on photoacoustic spectroscopy according to claim 1, characterized in that, The inner diameter of the second track is larger than the distance between the partitions on both sides of the rock.

4. The identification method of the rock block size identification system based on photoacoustic spectroscopy as described in any one of claims 1-3, characterized in that, The steps are as follows: S1: Place the rocks spaced between two adjacent partitions on the conveyor belt; S2: When the rock between the partitions is conveyed to the area directly below the acquisition component, the conveyor belt stops moving, and the acquisition component collects photoacoustic signals from the rock. S3: Analyze the acquired photoacoustic signals to determine the size of the rock blocks.

5. The identification method of the rock block size identification system based on photoacoustic spectroscopy according to claim 4, characterized in that, Before identification, photoacoustic signals of different rock block sizes are collected and a database is formed. When identifying rock block size, the collected photoacoustic signals are compared with the information in the database to determine the specific size of the rock block.

6. The identification method of the rock block size identification system based on photoacoustic spectroscopy according to claim 4, characterized in that, The photoacoustic signal collected in S2 is transmitted to an amplifier via a microphone, and then transmitted to a computer for analysis.

7. The identification method of the rock block size identification system based on photoacoustic spectroscopy according to claim 4, characterized in that, The height of the acquisition component relative to the conveyor belt is adjustable.

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