Aggregate needle-sheet-shaped particle content tester and use method thereof

Abstract

The invention discloses an aggregate needle-sheet-shaped particle content tester and a use method thereof. According to the aggregate needle-sheet-shaped particle content measuring instrument and the using method thereof, only a sample needs to be put into the measuring instrument, the measuring instrument can vibrate and disperse the sample, the influence of overlapping on sample scanning is avoided, the measuring instrument can automatically weigh and record the mass of the sample, and after samples of different size fractions are sequentially put into the measuring instrument, the measuring instrument can be used for measuring the content of needle-sheet-shaped particles. Automatically calculating the proportion of the sample of each size fraction; and the determinator can automatically identify and position needle-shaped particles and sheet-shaped particles in the sample and perform color development marking, the mass of the needle-shaped particles and the sheet-shaped particles is weighed, the content of the needle-shaped particles and the sheet-shaped particles in the sample is calculated through a calculation program of the determinator, and the content is displayed on a display screen of the determinator. The determinator can shorten the determination time of needle-shaped and sheet-shaped particles and improve the working efficiency; meanwhile, misjudgment on the sample needle and the flaky particles during manual identification is avoided, and the accuracy of a test result is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of aggregate particle determination, and in particular relates to an aggregate needle-shaped particle content determination instrument and a use method thereof. Background Art

[0002] According to the "Testing Procedure for Sand and Gravel Aggregates of Hydraulic Concrete" DL / T5151-2014, "Testing Procedure for Hydraulic Concrete" SL / T352-2020 and "Testing Procedure for Highway Engineering Aggregates" JTG 3432-2024: The quality of stone is assessed by the content of needle-shaped and flake-shaped particles. The test steps are as follows: According to the particle size classification of needle-shaped and flake-shaped tests and their corresponding gauge hole width or spacing, the needle-shaped and flake-shaped gauges are used to identify the samples one by one. Any particle whose length is greater than the corresponding spacing on the needle-shaped gauge is a needle-shaped particle; any particle whose thickness is less than the corresponding hole width on the flake-shaped gauge is a flake-shaped particle. The minimum sampling mass for needle-shaped and flake-shaped particle tests varies according to the nominal particle size of the aggregate and the number of samples. Weigh the mass of needle-shaped and flake-shaped particles identified one by one, and compare it with the total mass of the sample to obtain the content of needle-shaped and flake-shaped particles in the sample of that particle size.

[0003] Gravel or pebbles with a particle size greater than 40 mm, that is, a nominal maximum particle size greater than 37.5 mm, can be identified as needle-shaped or flake-shaped particles using a caliper.

[0004] Principle for determining needle-shaped and flake-shaped particles: Needle-shaped particles refer to particles whose ratio of maximum length to the average particle size of the corresponding particle grade is greater than 2.4; flake-shaped particles refer to particles whose ratio of maximum thickness to the average particle size of the corresponding particle grade is less than 0.4.

[0005] The similarities and differences between the above regulations are: due to the inconsistent aggregate particle size divisions between highway projects and hydropower and water conservancy projects, the spacing or hole width of the gauges is different, but the division principle is the same. The above standards have the same calculation formula for the needle-like and flake-like particle content of each level of samples. The JTG standard does not mention the calculation method for the needle-like and flake-like particle content of mixed-graded aggregates; the DL standard and the SL standard divide and calculate the proportion according to the particle size, multiply the proportion of different particle sizes by the needle-like and flake-like particle content of the particle size, and then sum them up as the needle-like and flake-like content of mixed-graded aggregates. When conducting needle-like and flake-like identification, the particle size division and the corresponding minimum sampling amount are different. The minimum sampling amount of the JTG standard is 0.2kg and the maximum sampling amount is 28kg; the minimum sampling amount of the DL standard and the SL standard is 2kg and the maximum sampling amount is 40kg.

[0006] In summary, the existing practice requires manual identification of aggregates one by one to determine whether they are needle-shaped particles or flaky particles. The experimental workload is large and it takes a lot of time to identify, especially when the number of samples is large. Secondly, there is a certain possibility of misjudgment in manual identification. If the number of misjudgments is large, it will affect the judgment of the stone quality.

[0007] The patent document with announcement number CN118334106A discloses an aggregate particle size grading and needle-flake detection system, which relates to the field of aggregate detection technology, including an image acquisition module, a data processing module, an aggregate analysis module and a data statistics module; the image acquisition module is used to collect aggregate data; the data processing module is used to determine the plane equation where the aggregate is located, find the length and width of the plane, and determine the area value and volume value of each aggregate; the invention realizes the analysis of data obtained by a structured light 3D camera, which is different from the data obtained by multi-faceted mobile scanning in the present application. At the same time, the invention lacks a positioning structure, and manual judgment of the position is required when taking out the corresponding sample.

[0008] The patent document with announcement number CN118602946A discloses a DVC-based three-dimensional on-site real-time monitoring device and method for the morphology of machine-made coarse aggregate particles. The device includes: a coarse aggregate conveying mechanism, a transfer conveyor line, a material classification mechanism, a micro-CT volume image data acquisition instrument and a particle morphology intelligent monitoring and analysis workstation. The present invention can perform real-time monitoring and intelligent analysis on the comprehensive particle morphology parameters of the on-site coarse aggregate, realize a comprehensive evaluation of the on-site finished coarse aggregate particle morphology, and complete the classification and collection of materials according to the analysis results. The present invention is based on DVC technology to collect digital volume images of machine-made coarse aggregates, and reconstructs the three-dimensional morphology of coarse aggregate particles by constructing three-dimensional image information data of coarse aggregates. However, the equipment needs to occupy a large area for fixed setting, is inconvenient to move, and cannot be maneuvered with the detection personnel.

[0009] The patent document with the announcement number CN112808572A discloses a device for screening needle-like particles in aggregates, including a screening frame, a buffer positioning frame structure, an inlet bucket, a vibration motor, a preliminary material outlet frame structure, a material guide plate, a transverse plate, a material guide hole, a transverse movable frame structure, a powder finished product separation frame structure, an L-shaped connecting plate, a transverse plate, a storage bucket, a control panel and a control switch. The buffer positioning frame structure is installed on the left and right sides of the lower part of the screening frame; the inlet bucket is plugged into the upper left part of the screening frame; and the preliminary material outlet frame structure is installed on the inner upper part of the screening frame. The triangular cutting frame of the invention is welded on the left and right sides of the upper part of the discharge hole, which is convenient for cutting off the needle-like pieces inserted into the discharge hole when in use; the limit frame screw is installed on the inner side of the longitudinal frame, which is convenient for limiting the longitudinal frame when in use, and can avoid the longitudinal frame from being ejected from the positioning hole under the action of the buffer spring. The main technical problem solved by the device is the screening of needle-like particles, but it cannot solve the technical problem of measuring the content of needle-like and flake-like particles in the particle size sample. Summary of the invention

[0010] In order to solve the above technical problems, the present invention provides an aggregate needle-shaped particle content measuring instrument and a use method thereof.

[0011] The present invention is achieved through the following technical solutions.

[0012] The present invention provides an aggregate needle-shaped particle content measuring instrument, comprising a main body, a control system arranged on the main body, a box cover arranged on the top of the main body, a sample placement plate and a scanning system arranged inside the main body, a sensor and a vibration device arranged at the bottom of the main body, the sample placement plate arranged above the sensor and the vibration device, and the control system is electrically connected to the scanning system.

[0013] Preferably, the scanning system comprises a scanning device A, a scanning device B and a scanning device C, wherein the scanning device A is arranged on the top of the main body, the scanning device B is arranged on the inner wall of the rear side wall of the main body, and the scanning device C is arranged on the inner wall of the front side wall of the main body.

[0014] Preferably, a positioning grid is arranged on the sample placement plate, a baffle is arranged on the edge of the sample placement plate, and handles are arranged on the baffles on both sides of the sample placement plate.

[0015] Preferably, an operation display screen, a data interface, a measuring instrument switch and a status light are provided on the control system, a battery is provided in the control system, and the operation display screen, the data interface, the measuring instrument switch and the status light are all provided on the front side of the control system.

[0016] Preferably, a vibration device motor is arranged in the main body, the vibration device is connected to the vibration device motor, and the vibration device motor is electrically connected to the control system.

[0017] Preferably, the box cover is hinged to the top of the main body, and a handle is provided on the box cover.

[0018] Preferably, the main body and the box cover are made of stainless steel.

[0019] A method for using an aggregate needle-shaped particle content measuring instrument comprises the following steps:

[0020] S1: Open the box cover and pour the sample into the sample placement plate, turn on the tester, select the corresponding version of the procedure for measurement, and enter the information;

[0021] S2: Start the measurement, use the vibration device to vibrate and flatten the sample, and the scanning system to scan and obtain data;

[0022] S3: Take out the needle-like particles in the sample, then extract and pour out the remaining sample, place the needle-like particles in the previously taken out sample on the sample placement plate, and continue to measure the needle-like particles of the next particle size sample;

[0023] S4: After all the particle size samples are measured, the measuring instrument will automatically calculate the proportion of each grade of samples. By entering the measurement result interface, the final mixed graded needle-like and flake-like particle content can be displayed. Finally, the data is connected to the external storage device through the data interface for data transfer.

[0024] Preferably, the determination basis is determined in step S1, the sample is sieved according to the sampling amount and particle size specified in the determination procedure, and then placed in the determination instrument in sequence to determine the content of needle-like particles in each level of the sample;

[0025] After the analyzer is turned on, the status light will light up, indicating that the analyzer has been turned on normally. Enter the control system page and operate through the display screen; select the protocol version and enter the protocol selection interface. After selecting the protocol, click the interface return button to enter the main interface.

[0026] Enter the information entry interface, input the sample number and tester information, click the corresponding button of the particle size on the screen, select the sample particle size on the sample placement plate, click the weighing button, the analyzer will automatically weigh the particle size and display it, click the interface return button to enter the main interface;

[0027] After clicking the start test button in step S2, the start test interface is entered, and the vibration device motor is automatically turned on to drive the vibration device to vibrate, thereby driving the sample placement plate to vibrate, and the samples are dispersed on the sample placement plate to avoid sample overlap; the baffle is used to prevent the sample from falling off the sample placement plate during the vibration process, and the vibration is stopped after the sample is dispersed;

[0028] The scanning device is automatically turned on, and the scanning device A on the top scans twice in the order from right to left and from left to right; the scanning device B on the back of the measuring instrument scans twice in the order from left to right and from right to left; the scanning device C on the front of the measuring instrument scans twice in the order from right to left and from left to right. During the scanning process, the sample graphics are displayed in real time on the display screen; after the scanning is completed, the measuring instrument automatically calculates the parameters of the maximum length and maximum thickness of the sample, identifies needle- and flake-shaped particles, and locates and color-marks them.

[0029] Preferably, in step S3, according to the positioning and marking of the needle-like particles of the sample on the operation display screen, the positioning grid on the sample placement plate is corresponding to find the needle-like particles in the sample, and the needle-like particles in the sample are taken out through the placement plate handle, and then the remaining sample is extracted and poured out, and the needle-like particles in the sample taken out previously are placed on the sample placement plate, and then the interface return button is clicked to enter the main interface; the test result button is clicked to enter the test result interface, and the weighing button is clicked to weigh the mass of the needle-like particles through the sensor and display it, and the needle-like particle content of the sample of this level is automatically calculated at the same time.

[0030] Then repeat the steps from entering the information in step S1 to automatically calculating the needle-like flake particle content of the sample of this grade, and continue to measure the needle-like flake particles of the next grade sample; after all grade sample tests are completed, the measuring instrument will automatically calculate the proportion of each grade sample, and the final mixed grade needle-like flake particle content can be displayed by entering the test result interface;

[0031] If multiple groups of sample measurements are required, after the previous group of measurements is completed, repeat the steps from entering the information in step S1 to automatically calculating the needle-like particle content of the sample of that grade. Each group of data is displayed on the operation display screen in turn. The measuring instrument control system automatically calculates the average value of the corresponding values ​​of the same particle grade, and finally calculates and displays the average value of the needle-like particle content of multiple groups of measurements, which is the needle-like particle content of the sample. When the amount of a single-grade sample is too large and overlapping still occurs after the measuring instrument is vibrated, the sample needs to be tested in multiple groups at multiple times. According to the requirements of the regulations, if the average value of two measurements is used as the test result, multiple groups of tests are also required.

[0032] The beneficial effects of the present invention are:

[0033] By using the measuring instrument of the present invention, the time of needle and flake particle testing can be greatly shortened and work efficiency can be improved; at the same time, the misjudgment of sample needle and flake particles during manual identification can be avoided, thereby improving the accuracy of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the structure of the present invention;

[0035] Figure 2 It is a schematic diagram of the top view of the structure of the present invention;

[0036] Figure 3 It is a schematic diagram of the internal structure of the present invention;

[0037] Figure 4 It is a schematic diagram of the bottom structure of the present invention;

[0038] Figure 5 is a schematic diagram of a menu page of a display screen of the present invention;

[0039] Figure 6 is a schematic diagram of a protocol selection page of the present invention;

[0040] Figure 7 It is a schematic diagram of the information entry page of the present invention;

[0041] Figure 8 is a schematic diagram of a test page of the present invention;

[0042] Fig. 9 is a schematic diagram of a test result page of the present invention;

[0043] In the figure: 1-main body, 11-sample placement plate, 12-positioning grid, 13-baffle, 14-placement plate handle, 15-sensor, 16-vibration device, 17-vibration device motor, 2-control system, 21-operation display screen, 3-box cover, 31-handle, 4-data interface, 5-measurement instrument switch, 6-status light, 71-scanning device A, 72-scanning device B, 73-scanning device C. DETAILED DESCRIPTION

[0044] The technical solution of the present invention is further described below, but the scope of protection claimed is not limited to the description.

[0045] Example:

[0046] like Figures 1 to 9 As shown, an aggregate needle-like particle content measuring instrument includes a main body 1, on which a control system 2 is arranged. The main body 1 is a box-type structure, and the control system 2 can be protected by being arranged inside the main body 1. A box cover 3 is arranged on the top of the main body 1, and a sample placement plate 11 and a scanning system are arranged inside the main body 1. A sensor 15 and a vibration device 16 are arranged at the bottom of the main body 1. The sample placement plate 11 is arranged above the sensor 15 and the vibration device 16, and the control system 2 is electrically connected to the scanning system.

[0047] The scanning system includes a scanning device A71, a scanning device B72 and a scanning device C73. The scanning device A71 is arranged on the top of the main body 1, the scanning device B72 is arranged on the inner wall of the rear side wall of the main body 1, and the scanning device C73 is arranged on the inner wall of the front side wall of the main body 1.

[0048] A positioning grid 12 is disposed on the sample placement plate 11 , a baffle 13 is disposed at the edge of the sample placement plate 11 , and handles 14 are disposed on the baffles 13 at both sides of the sample placement plate 11 .

[0049] The control system 2 is provided with an operation display screen 21, a data interface 4, a measuring instrument switch 5 and a status light 6, and a battery is provided in the control system 2. The operation display screen 21, the data interface 4, the measuring instrument switch 5 and the status light 6 are all arranged on the front side of the control system 2.

[0050] A vibration device motor 17 is disposed in the main body 1 , the vibration device 16 is connected to the vibration device motor 17 , and the vibration device motor 17 is electrically connected to the control system 2 .

[0051] The box cover 3 is hinged to the top of the main body 1 , and a handle 31 is provided on the box cover 3 .

[0052] The main body 1 and the box cover 3 are made of stainless steel. The external dimensions of the main body 1 box are 680mm×360mm×240mm, and it has good protection.

[0053] A method for using an aggregate needle-shaped particle content measuring instrument comprises the following steps:

[0054] S1: Open the box cover 3 and pour the sample into the sample placement plate 11, turn on the measuring instrument, select the corresponding version of the procedure for measurement, and enter the information;

[0055] S2: Start measuring, flatten the sample by vibrating it through the vibrating device 16 and scan it by the scanning system to obtain data;

[0056] S3: taking out the needle-like particles in the sample, then extracting and pouring out the remaining sample, placing the needle-like particles in the sample previously taken out on the sample placement plate 11, and continuing to measure the needle-like particles of the next particle size sample;

[0057] S4: After all the particle size samples are measured, the measuring instrument will automatically calculate the proportion of each grade of samples. By entering the measurement result interface, the final mixed graded needle-like and flake-like particle content can be displayed. Finally, the data is connected to an external U disk through data interface 4 for data transfer. Data interface 4 is a USB interface.

[0058] In the step S1, the determination basis is determined, and the sample is sieved according to the sampling amount and particle size specified in the determination procedure, and then placed in the determination instrument in turn to determine the needle-like particle content of each level of the sample;

[0059] After the analyzer is turned on, the status light turns on, indicating that the analyzer has been turned on normally. Enter the control system page and operate through the operation display screen; select the regulation version and enter the regulation selection interface. The analyzer contains three regulation version options: JTG 3432-2024, DL / T5151-2014 and SL / T 352-2020. After the regulation version is invalidated, the system will automatically update the latest version of the regulation. After selecting the regulation, click the interface return button to enter the main interface;

[0060] Enter the information entry interface, input the sample number and the testing personnel information, click the 01 button corresponding to the particle size on the screen, where numbers 01 to 12 represent the number of tests, and the numbers are fixed by the system, and are sorted in order according to the number of tests. Select the sample particle size on the sample placement plate. The particle size selection range here is consistent with the corresponding regulations. If the JTG standard is selected, the available particle size range includes: 4.75mm~9.5mm, 9.5mm~16mm, 16mm~19mm; if the DL standard or SL standard is selected, the available particle size range includes: 5mm~10mm, 10mm~16mm, 16mm~20mm; click the weighing button, the measuring instrument automatically weighs the mass of the particle size and displays it, click the interface return button to enter the main interface;

[0061] After clicking the start test button in step S2, the start test interface is entered, and the vibration device motor 17 is automatically turned on to drive the vibration device 16 to vibrate, thereby driving the sample placement plate 11 to vibrate, and the samples are dispersed on the sample placement plate 11 to avoid sample overlap; the baffle 13 is used to prevent the sample from falling off the sample placement plate 11 during the vibration process, and the vibration is stopped after the sample is dispersed;

[0062] The scanning device turns on automatically, and the scanning device A71 on the top scans twice in the order from right to left and from left to right; the scanning device B72 on the back of the measuring instrument scans twice in the order from left to right and from right to left; the scanning device C73 on the front of the measuring instrument scans twice in the order from right to left and from left to right, and the sample graphics are displayed in real time on the display screen during the scanning process; after the scanning, the measuring instrument automatically calculates parameters such as the maximum length and maximum thickness of the sample, and according to the principle that needle-shaped particles refer to particles with a ratio of maximum length to the average particle size of the corresponding particle grade greater than 2.4; flake particles refer to particles with a ratio of maximum thickness to the average particle size of the corresponding particle grade less than 0.4, the instrument automatically identifies needle-shaped and flake-shaped particles, and locates and marks them with colors.

[0063] In the step S3, the needle-like particles in the sample are located and marked on the operation display screen 21, corresponding to the positioning grid 12 on the sample placement plate 11, and the needle-like particles in the sample are found. The needle-like particles in the sample are taken out through the placement plate handle 14, and then the remaining sample is extracted and poured out, and the needle-like particles in the sample previously taken out are placed on the sample placement plate 11, and then the interface return button is clicked to enter the main interface; the test result button is clicked to enter the test result interface, and the weighing button is clicked to weigh the mass of the needle-like particles through the sensor 15 and display it, and the needle-like particle content of the sample of this level is automatically calculated.

[0064] Then repeat the steps from entering the information in step S1 to automatically calculating the needle-like flake particle content of the sample of this grade, and continue to measure the needle-like flake particles of the next grade sample; after all grade sample tests are completed, the measuring instrument will automatically calculate the proportion of each grade sample, and the final mixed grade needle-like flake particle content can be displayed by entering the test result interface;

[0065] If multiple groups of sample measurements are required, after the previous group of measurements is completed, repeat the steps from entering the information in step S1 to automatically calculating the needle-like particle content of the sample of that grade, and each group of data is displayed on the operation display screen 21 in turn. The measuring instrument control system 2 automatically calculates the average value of the corresponding values ​​of the same particle grade, and finally calculates and displays the average value of the needle-like particle content of multiple groups of measurements, which is the needle-like particle content of the sample; when the amount of a single-grade sample is too large and overlapping still occurs after the measuring instrument is vibrated, the sample needs to be divided into multiple groups for testing; according to the requirements of the regulations, if the average value of two measurements is used as the test result, multiple groups of tests are also required.

Claims

1. An aggregate needle-shaped particle content tester, characterized in that: The invention comprises a main body (1), a control system (2) is arranged on the main body (1), a box cover (3) is arranged on the top of the main body (1), a sample placement plate (11) and a scanning system are arranged inside the main body (1), a sensor (15) and a vibration device (16) are arranged at the bottom of the main body (1), the sample placement plate (11) is arranged above the sensor (15) and the vibration device (16), and the control system (2) is electrically connected to the scanning system.

2. The aggregate needle-shaped particle content measuring instrument according to claim 1, characterized in that: The scanning system comprises a scanning device A (71), a scanning device B (72) and a scanning device C (73), wherein the scanning device A (71) is arranged on the top of the main body (1), the scanning device B (72) is arranged on the inner wall of the rear side wall of the main body (1), and the scanning device C (73) is arranged on the inner wall of the front side wall of the main body (1).

3. The aggregate needle-shaped particle content measuring instrument according to claim 1, characterized in that: A positioning grid (12) is arranged on the sample placement plate (11), a baffle (13) is arranged at the edge of the sample placement plate (11), and handles (14) are arranged on the baffles (13) on both sides of the sample placement plate (11).

4. The aggregate needle-shaped particle content measuring instrument according to claim 1, characterized in that: The control system (2) is provided with an operation display screen (21), a data interface (4), a measuring instrument switch (5) and a status light (6); a storage battery is provided in the control system (2); and the operation display screen (21), the data interface (4), the measuring instrument switch (5) and the status light (6) are all provided on the front side of the control system (2).

5. The aggregate needle-shaped particle content tester according to claim 1, characterized in that: A vibration device motor (17) is arranged in the main body (1), the vibration device (16) is connected to the vibration device motor (17), and the vibration device motor (17) is electrically connected to the control system (2).

6. The aggregate needle-shaped particle content tester according to claim 1, characterized in that: The box cover (3) is hinged to the top of the main body (1), and a handle (31) is provided on the box cover (3).

7. An aggregate needle-shaped particle content tester as claimed in claim 1, characterized in that: The main body (1) and the box cover (3) are made of stainless steel.

8. A method for using the aggregate needle-shaped particle content tester according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1: Open the box cover (3) and pour the sample into the sample placement plate (11), turn on the measuring instrument, select the corresponding version of the procedure for measurement, and enter the information; S2: Start measuring, use the vibration device (16) to vibrate and flatten the sample, and the scanning system to scan and obtain data; S3: taking out the needle-like particles in the sample, then extracting and pouring out the remaining sample, placing the needle-like particles in the previously taken out sample on the sample placement plate (11), and continuing to measure the needle-like particles of the next particle size sample; S4: After all the particle size samples are measured, the measuring instrument will automatically calculate the proportion of each grade of samples. By entering the measurement result interface, the final mixed graded needle-like and flake-like particle content can be displayed. Finally, the data is connected to the external storage device through the data interface (4) for data transfer.

9. The method for using the aggregate needle-shaped particle content measuring instrument as claimed in claim 8, characterized in that: In the step S1, the determination basis is determined, and the sample is sieved according to the sampling amount and particle size specified in the determination procedure, and then placed in the determination instrument in turn to determine the needle-like particle content of each level of the sample; After the analyzer is turned on, the status light (6) lights up to indicate that the analyzer has been turned on normally. Enter the control system page and operate through the operation display screen (21); select the regulation version and enter the regulation selection interface. The analyzer includes three regulation version options: JTG 3432-2024, DL / T 5151-2014 and SL / T 352-2020. After selecting the regulation, click the interface return button to enter the main interface; Enter the information entry interface, input the sample number and tester information, click the corresponding option of the particle size on the screen, select the sample particle size on the sample placement plate, click the weighing button, the analyzer will automatically weigh the particle size and display it, click the interface return button to enter the main interface; After clicking the start test button in step S2, the start test interface is entered, and the vibration device motor (17) is automatically turned on to drive the vibration device (16) to vibrate, thereby driving the sample placement plate (11) to vibrate, and the samples are dispersed on the sample placement plate (11) to avoid sample overlap; the baffle (13) is used to prevent the samples from falling off the sample placement plate (11) during the vibration process, and the vibration is stopped after the samples are dispersed; The scanning device is automatically turned on, and the scanning device A (71) on the top scans twice in the order from right to left and from left to right; the scanning device B (72) on the rear side of the measuring instrument scans twice in the order from left to right and from right to left; the scanning device C (73) on the front side of the measuring instrument scans twice in the order from right to left and from left to right. During the scanning process, the sample graphics are displayed in real time on the display screen; after the scanning is completed, the measuring instrument automatically calculates the parameters of the maximum length and maximum thickness of the sample, identifies needle-shaped and flake-shaped particles, and locates and color-marks them.

10. The method for using the aggregate needle-shaped particle content tester according to claim 8, characterized in that: In step S3, the needle-like particles in the sample are located and marked on the operation display screen (21), corresponding to the positioning grid (12) on the sample placement plate (11), and the needle-like particles in the sample are found. The needle-like particles in the sample are taken out through the placement plate handle (14), and then the remaining sample is extracted and poured out, and the needle-like particles in the sample previously taken out are placed on the sample placement plate (11), and then the interface return button is clicked to enter the main interface; the test result button is clicked to enter the test result interface, and the weighing button is clicked to weigh the mass of the needle-like particles through the sensor (15) and display it, and the needle-like particle content of the sample of this level is automatically calculated. Then repeat the steps from entering the information in step S1 to automatically calculating the needle-like flake particle content of the sample of this grade, and continue to measure the needle-like flake particles of the next grade sample; after all grade sample tests are completed, the measuring instrument will automatically calculate the proportion of each grade sample, and the final mixed grade needle-like flake particle content can be displayed by entering the test result interface; If multiple groups of sample measurements are required, after the previous group of measurements is completed, the steps from entering the information in step S1 to automatically calculating the needle-like particle content of the sample of that grade are repeated, and each group of data is displayed on the operation display screen (21) in turn. The measuring instrument control system (2) automatically calculates the average value of the corresponding values ​​of the same particle grade, and finally calculates and displays the average value of the needle-like particle content of multiple groups of measurements, which is the needle-like particle content of the sample; when the amount of a single-grade sample is too large and overlapping still occurs after the measuring instrument is vibrated, the sample needs to be divided into multiple groups for testing; according to the regulations, if the average value of two measurements is used as the test result, multiple groups of tests are also required.

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