Device and method suitable for rapidly measuring pressure resistance of sorghum grains

Abstract

The invention relates to the technical field of pressure resistance measurement of sorghum grains, aims to solve the problem that the pressure resistance of the sorghum grains cannot be rapidly, simply and accurately evaluated in the prior art, and provides a rapid pressure resistance measurement device and method suitable for the sorghum grains. Comprising a pressure testing unit, a sample introduction unit, a sample fixing unit and a limiting alarm unit, the pressure testing unit comprises a working machine table, a rocker arm and a pressure gauge; the sample introduction unit comprises a funnel, a sample loading device and a telescopic sample introduction pipeline; the sample fixing unit is mounted above the sample placing base, and the sample fixing unit is provided with apertures matched with sorghum grains; the limiting alarm unit is an infrared alarm limiting device, a pressing shaft driven by a rocker arm is axially arranged on the pressure gauge, and a probe is arranged at the bottom end of the pressing shaft. The method has the beneficial effects that the design is reasonable, the operation is convenient, the stability is high, the application range is wide, the compressive resistance result of the sorghum grains can be quickly and simply measured, and the compressive resistance of the sorghum grains can be conveniently evaluated in a data quantification mode.

Description

Technical Field

[0001] This invention relates to the field of sorghum grain stress resistance testing technology, and more specifically, to a device and method for rapid testing of sorghum grain stress resistance. Background Technology

[0002] As a key raw material for brewing soy sauce-flavored baijiu, the integrity and compressive strength of sorghum grains have a significant impact on fermentation efficiency and aroma formation. Strong compressive strength and a dense grain structure allow sorghum grains to better maintain their integrity during steaming and cooking, preventing excessive breakage or clumping. This maintains a loose material layer structure, ensuring good aeration, which is beneficial for subsequent solid-state fermentation. If the compressive strength is weak, the grains are easily broken during steaming and stacking, producing excessive fine particles. This can lead to over-gelatinization or uneven gelatinization. Excessive particles fill the gaps between materials, severely reducing aeration and creating localized anaerobic environments. This promotes the growth of unwanted bacteria, leading to spoilage and affecting the oxygen supply and heat dissipation in subsequent fermentation. Simultaneously, the fine particles easily absorb water and clump together, hindering steam penetration, resulting in excessively high acidity, reduced alcohol yield, and poorer quality (strong off-flavors).

[0003] It has strong compressive strength, which enables sorghum grains to maintain a good particle shape during the brewing process and makes the mash structure loose. This is conducive to the early growth and reproduction of aerobic microorganisms (such as molds and yeasts) and oxygen consumption, creating favorable conditions for subsequent anaerobic fermentation (brewing).

[0004] Currently, there is no complete and convenient testing method for sorghum stress resistance, making it difficult to assess the stress resistance of sorghum grains. Summary of the Invention

[0005] The present invention aims to provide a device and method for rapid determination of the compressive strength of sorghum grains, so as to solve the problem that the existing technology cannot achieve rapid, simple and accurate assessment of the compressive strength of sorghum grains.

[0006] The embodiments of the present invention are implemented as follows: This invention provides a device for rapid testing of the compressive strength of sorghum grains, comprising a pressure testing unit, a sample injection unit, a sample fixing unit, and a limit alarm unit; The aforementioned pressure testing unit includes a working platform, a rocker arm, and a pressure gauge, with the rocker arm being connected to the working platform via a transmission mechanism. The above-mentioned sample injection unit includes a funnel, a sample loading device and a retractable sample injection pipe. The sample loading device is connected to the funnel. One end of the retractable sample injection pipe is connected to the funnel, and the other end is movably adapted to the center position of the sample placement base. The sample fixing unit is installed above the sample placement base, and the sample fixing unit has a hole diameter adapted to sorghum grains. The aforementioned limit alarm unit is an infrared alarm limit device. The aforementioned infrared alarm limit device is installed five centimeters above the sample placement base on the side of the aforementioned workbench. The aforementioned pressure gauge has a rocker arm driven pressure shaft in the axial direction, and the bottom end of the aforementioned pressure shaft has a probe.

[0007] This embodiment discloses a rapid sorghum grain pressure resistance testing device that integrates four functional units: a pressure testing unit, a sample injection unit, a sample fixing unit, and a limit alarm unit. These units work together to form a standardized testing system. The pressure testing unit is connected to the worktable via a rocker arm to meet the pressure application requirements for grain cracking testing. The sample injection unit uses a combination of a funnel and a sample loading device, along with a retractable injection pipe that can be moved to the center of the base, enabling precise and continuous single-grain sample loading. The sample fixing unit securely positions the grain by adapting to the aperture size, ensuring accurate probe pressure application. The infrared alarm limit device is precisely installed five centimeters above the sample placement base, promptly reminding the operator to control the probe's downward pressure rhythm and avoid operational errors. Therefore, this rapid sorghum grain pressure resistance testing device is reasonably designed, easy to operate, highly stable, widely applicable, and can quickly and easily measure the pressure resistance of sorghum grains, facilitating the quantitative evaluation of sorghum grain pressure resistance.

[0008] Optionally: the range of the pressure gauge is 500N, and the measurement accuracy of the pressure gauge is not less than 0.01N.

[0009] This setup, by limiting the pressure measurement range to 500N, can fully cover the pressure resistance testing requirements of sorghum grains, avoiding measurement failures due to insufficient range or wasted precision due to excessive range. At the same time, it ensures that the measurement accuracy is not less than 0.01N, which can accurately capture the maximum pressure value at the moment of grain rupture, effectively reducing measurement errors and ensuring the accuracy and reliability of sorghum grain pressure resistance test results, providing precise data support for the quantitative evaluation of sorghum quality and the selection of brewing raw materials.

[0010] Optionally: The above-mentioned sample loading device has a partition plate, which is installed in the middle of the inside of the funnel. A leakage hole is opened on the axis of the partition plate. A through pipe is installed on the lower part of the partition plate. A through hole is opened on the side wall of the through pipe corresponding to the position of the leakage hole. A slidable bolt is provided in the through pipe. One end of the bolt is close to the funnel and located in the through pipe. The other end of the bolt passes through the through pipe and is away from the funnel. A handle is connected to the other end of the bolt.

[0011] This design allows for layered and controlled feeding of sorghum grains within the funnel via the aforementioned partition, preventing grain accumulation and blockage. The central perforation, along with the connecting pipe and the bolt, forms a controllable feeding channel. By pulling the handle and sliding the bolt, the operator can precisely control the connection or closure of the perforation and the connecting pipe's outer wall, ensuring the orderly falling of individual sorghum grains and completely eliminating the possibility of multiple grains being fed simultaneously. This guarantees that only a single grain enters the sample fixing unit for each test. Furthermore, this structure is easy to operate, requiring no complex adjustments to achieve continuous and stable single-grain feeding, effectively improving feeding efficiency and accuracy, reducing subjective errors caused by manual operation, and further ensuring the consistency and reliability of sorghum grain pressure resistance test results.

[0012] Optionally: The above-mentioned sample fixing unit has several models, and the above-mentioned aperture of the sample fixing unit is different for each model.

[0013] This setup is compatible with sorghum grains of different sizes, ensuring stable sample positioning and guaranteeing the applicability and accuracy of the test.

[0014] Optionally, the above-mentioned infrared alarm limit device has a self-powered power supply.

[0015] This setup eliminates the need for external power supply, allowing for flexible placement of the infrared alarm limit devices and avoiding wiring limitations. It also ensures stable alarm triggering even in environments without external power, guaranteeing accurate monitoring of the probe's descent distance during testing and maintaining the continuity and reliability of the testing operation.

[0016] In one embodiment of this invention, a method for determining the compressive strength of sorghum grains using a rapid testing device is also provided, comprising the following steps: Step 1, Sample preparation: Randomly weigh about 2g of sorghum grains of uniform maturity for later use; Step 2, Device debugging: Assemble and debug the measuring device to ensure that the rocker arm moves smoothly, the infrared alarm limit device responds normally, and the pressure gauge displays accurately. Step 3, sample injection: Place the sample prepared in Step 1 into the funnel of the injection unit, pull and push the loading device to push a sorghum grain into the retractable injection pipe, and the sorghum grain is knocked into the sample fixing unit. Step 4, pressure test: Activate the pressure test unit and move the pressure shaft downward. When the probe of the pressure shaft moves synchronously by 10cm, the infrared alarm limit device will sound an alarm. The operator will slowly swing the rocker arm to make the probe of the pressure shaft press down steadily until the sorghum grains are broken. Record the maximum pressure value displayed by the pressure gauge. Step 5: Calculate the results. Repeat steps 3 and 4, testing no fewer than 20 sorghum grains. The average of all test results is taken as the compressive strength test result of the sample.

[0017] Optionally: In step one, the maturity criteria for sorghum grain samples are that the grains are plump, uniform in color, and free from damage, mold, and insect infestation.

[0018] This setup clarifies the criteria for judging sample maturity, ensures uniform sample quality, avoids deviations in stress resistance test results due to differences in grain maturity, guarantees the comparability and reliability of test data, and lays a unified foundation for the quantitative assessment of sorghum stress resistance.

[0019] Optionally: In step four, the probe is pressed down at a speed of 0.5 cm / s to 1 cm / s.

[0020] This setting avoids measurement deviations caused by sudden pressure changes and uneven instantaneous force on the grains due to excessively fast probe pressing speed, and also prevents the detection efficiency from being affected by excessively slow speed. This speed range can accurately capture the maximum pressure value at the moment of grain breakage, ensuring the authenticity and accuracy of the test results, while also taking into account the detection efficiency, and achieving efficient and accurate quantitative testing of pressure resistance.

[0021] Optionally: During repeated testing, the time interval between two adjacent tests shall not exceed 30 seconds.

[0022] This setup reduces the impact of environmental temperature and humidity changes on the physical properties of sorghum grains, prevents moisture loss or absorption of moisture due to prolonged storage, ensures consistent sample condition for each test, further improves the repeatability and reliability of test results, and guarantees testing efficiency.

[0023] Optionally: In step three, the distance between the end of the retractable sample inlet pipe and the sample fixing unit is controlled between 1cm and 3cm to avoid damage caused by collision during the falling of the grains.

[0024] This configuration shortens the sorghum grain's descent path, reduces the impact force between the grain and the sample fixing unit, prevents premature breakage or structural damage to the grain, and ensures the test sample maintains its original physical state. Simultaneously, it ensures the grain falls precisely into the aperture area of ​​the sample fixing unit, preventing deviation from affecting the accuracy of the probe's pressure application and further enhancing the authenticity and reliability of the test results.

[0025] In summary, the device and method for rapidly measuring the compressive strength of sorghum grains disclosed in this invention have the advantages of reasonable design, convenient operation, strong stability, wide applicability, rapid and simple measurement of the compressive strength of sorghum grains, and easy evaluation of the compressive strength of sorghum grains in a data-quantified manner. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a front view of a device for rapid testing of the compressive strength of sorghum grains according to an embodiment of the present invention; Figure 2 This is a side view of a device for rapid testing of the compressive strength of sorghum grains according to an embodiment of the present invention; Figure 3 This is a cross-sectional view of the sample injection unit in an embodiment of the present invention; Figure 4 This is a three-dimensional view of the sample fixing unit in an embodiment of the present invention; Figure 5 This is a three-dimensional diagram of the limit alarm unit in an embodiment of the present invention.

[0028] Icons: 1-Pressure testing unit, 2-Sample injection unit, 3-Sample fixing unit, 4-Limit alarm unit, 5-Workbench, 6-Shaker arm, 7-Pressure gauge, 8-Function funnel, 9-Sample loading device, 10-Retractable injection pipe, 11-Sample placement base, 12-Orifice, 13-Infrared alarm limit device, 14-Pressure shaft, 15-Probe, 16-Baffle plate, 17-Leakage hole, 18-Through pipe, 19-Through hole, 20-Pulley rod, 21-Handle. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0031] Example 1 See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 This embodiment proposes a device for rapid testing of the compressive strength of sorghum grains, including a pressure testing unit 1, a sample injection unit 2, a sample fixing unit 3, and a limit alarm unit 4. Pressure testing unit 1 includes a workbench 5, a rocker arm 6 and a pressure gauge 7, with the rocker arm 6 being connected to the workbench 5 via a transmission connection. The sample injection unit 2 includes a funnel 8, a sample loading device 9, and a retractable sample injection pipe 10. The sample loading device 9 is connected to the funnel 8. One end of the retractable sample injection pipe 10 is connected to the funnel 8, and the other end is movably adapted to the center position of the sample placement base 11. The sample fixing unit 3 is installed above the sample placement base 11, and the sample fixing unit 3 is provided with a hole diameter 12 adapted to sorghum grains; The limit alarm unit 4 is an infrared alarm limit device 13. The infrared alarm limit device 13 is installed five centimeters above the sample placement base 11 on the side of the workbench 5. The pressure gauge 7 has a rocker arm 6 driving the pressure shaft 14 in the axial direction. The bottom end of the pressure shaft 14 has a probe 15, which is used to sound a buzzer alarm when the probe 15 descends to a set distance.

[0032] This embodiment discloses a rapid sorghum grain pressure resistance testing device that integrates four functional units: a pressure testing unit 1, a sample injection unit 2, a sample fixing unit 3, and a limit alarm unit 4. These units work together to form a standardized testing system. The pressure testing unit 1 is connected to the worktable 5 via a rocker arm 6, meeting the pressure application requirements for grain cracking testing. The sample injection unit 2 uses a combination of a funnel 8 and a sample loading device 9, along with a retractable sample injection pipe 10 that can be moved to the center of the base, enabling precise and continuous single-grain sample loading. The sample fixing unit 3 securely positions the grain using an adaptable aperture 12, ensuring accurate pressure application of the probe 15. The infrared alarm limit device 13 is precisely installed five centimeters above the sample placement base 11, promptly reminding the operator to control the pressure rhythm of the probe 15 and avoid operational errors. Therefore, this rapid sorghum grain pressure resistance testing device is reasonably designed, easy to operate, highly stable, widely applicable, and can quickly and easily measure the pressure resistance of sorghum grains, facilitating the quantitative evaluation of the pressure resistance of sorghum grains.

[0033] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The pressure gauge 7 has a range of 500N and a measurement accuracy of no less than 0.01N. By limiting the range of pressure gauge 7 to 500N, it can fully cover the requirements of sorghum grain pressure resistance testing, avoiding measurement failure due to insufficient range or wasted accuracy due to excessive range. At the same time, the specified measurement accuracy of no less than 0.01N can accurately capture the maximum pressure value at the moment of grain breakage, effectively reducing measurement errors and ensuring the accuracy and reliability of sorghum grain pressure resistance test results. This provides accurate data support for the quantitative evaluation of sorghum quality and the selection of brewing raw materials.

[0034] The sample loading device 9 has a partition 16, which is installed in the middle of the funnel 8. A perforation 17 is formed along the axis of the partition 16. A through-tube 18 is installed at the lower part of the partition 16. A through-hole 19 is formed on the side wall of the through-tube 18 corresponding to the position of the perforation 17. A slidable bolt 20 is installed inside the through-tube 18. One end of the bolt 20 is close to the funnel 8 and located inside the through-tube 18, while the other end of the bolt 20 passes through the through-tube 18 and is away from the funnel 8. A handle 21 is connected to the other end of the bolt 20. This allows the partition 16 to achieve stratified positioning of the sorghum grains inside the funnel 8, preventing grain accumulation and blockage. The perforation 17 and the through-tube... 18. The bolt 20, in conjunction with the other components, forms a controllable feeding channel. By pulling the handle 21, the operator can slide the bolt 20 to precisely control the connection or closure of the leakage hole 17 and the through hole 19 on the outer wall of the through pipe 18, thus achieving the orderly falling of single sorghum grains and completely eliminating the situation of multiple grains being sampled at the same time. This ensures that only a single grain enters the sample fixing unit 3 for each test. At the same time, this structure is easy to operate and can achieve continuous and stable single-grain sample loading without complicated debugging, effectively improving the efficiency and accuracy of sample loading, reducing subjective errors caused by manual operation, and further ensuring the consistency and reliability of the sorghum grain pressure resistance test results.

[0035] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The sample fixing unit 3 has several models, and the aperture 12 of the sample fixing unit 3 is different. This setting can be adapted to sorghum grains of different sizes, ensuring stable sample positioning and guaranteeing the applicability and accuracy of the test.

[0036] The infrared alarm limit device 13 has its own power supply (not shown in the figure), which does not require external power supply. The installation position of the infrared alarm limit device 13 can be flexibly arranged to avoid wiring restrictions. At the same time, it ensures that the device can still stably trigger the alarm function in the absence of external power supply, ensuring accurate monitoring of the descent distance of the probe 15 during the test and maintaining the continuity and reliability of the test operation.

[0037] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 In one embodiment of this invention, a method for determining the compressive strength of sorghum grains using a rapid testing device is also provided, comprising the following steps: Step 1, Sample preparation: Randomly weigh about 2g of sorghum grains of uniform maturity for later use; Step 2, device debugging: Assemble and debug the measuring device to ensure that the rocker arm 6 moves smoothly, the infrared alarm limit device 13 responds normally, and the pressure gauge 7 displays accurately. Step 3, sample injection: Place the sample prepared in step 1 into the funnel 8 of the injection unit 2, pull and push the loading device 9 so that a sorghum grain is pushed into the retractable injection pipe 10 by the loading device 9, and the sorghum grain is knocked into the sample fixing unit 3. Step 4, pressure test: Start pressure test unit 1 and move pressure shaft 14 downward. When the probe 15 of pressure shaft 14 moves synchronously a distance of 10cm, infrared alarm limit device 13 will sound an alarm. The operator will slowly swing rocker arm 6 to make probe 15 of pressure shaft 14 press down smoothly until the sorghum grains are broken. Record the maximum pressure value displayed by pressure gauge 7. Step 5: Calculate the results. Repeat steps 3 and 4, testing no fewer than 20 sorghum grains. The average of all test results is taken as the compressive strength test result of the sample.

[0038] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 In this embodiment, standardized sample preparation ensures the consistency of the test objects, and device debugging ensures the stability and reliability of the equipment. Precise single-grain injection avoids interference from multiple grains, and the infrared alarm limit device 13 limits the probe 15 to achieve precise control. By taking the average value through multiple repeated tests, the problem of strong subjectivity and large error in traditional sensory evaluation is solved, and the pressure resistance of sorghum grains is quantitatively detected. The whole process is simple, efficient and fast, and the test results are accurate, stable and repeatable, providing scientific and reliable technical support for sorghum quality evaluation, brewing raw material screening and process optimization.

[0039] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 In step one, the maturity criteria for sorghum grain samples are that the grains are plump, uniform in color, and free from damage, mold, and insect infestation. This clarifies the basis for judging sample maturity, ensures the uniformity of test sample quality, avoids deviations in stress resistance test results due to differences in grain maturity, guarantees the comparability and reliability of test data, and lays a unified foundation for the quantitative assessment of sorghum stress resistance.

[0040] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5In step four, the probe 15 is pressed down at a steady speed of 0.5 cm / s to 1 cm / s. This avoids measurement deviations caused by sudden pressure changes and uneven instantaneous force on the grains due to excessively fast pressing speed of the probe 15, and also prevents the detection efficiency from being affected by excessively slow speed. This speed range can accurately capture the maximum pressure value at the moment of grain breakage, ensuring the authenticity and accuracy of the test results, while also taking into account the detection efficiency, and realizing efficient and accurate pressure resistance quantitative testing.

[0041] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 During repeated testing, the time interval between two adjacent tests should not exceed 30 seconds. This reduces the impact of changes in ambient temperature and humidity on the physical properties of sorghum grains, prevents moisture loss or absorption of moisture due to prolonged storage, ensures that the sample condition is consistent for each test, further improves the repeatability and reliability of the test results, and guarantees testing efficiency.

[0042] The distance between the end of the retractable sample inlet pipe 10 and the sample fixing unit 3 is controlled between 1cm and 3cm to avoid damage caused by collision during the grain's fall. This shortens the sorghum grain's fall path, reduces the collision force between the grain and the sample fixing unit 3, and prevents premature breakage or structural damage to the grain, ensuring that the test sample maintains its original physical state. At the same time, it ensures that the grain falls accurately into the aperture 12 area of ​​the sample fixing unit 3, avoiding deviation that affects the accuracy of the pressure applied by the probe 15, and further improving the authenticity and reliability of the test results.

[0043] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 In this embodiment, a pressure testing unit 1 with specific parameter settings is used, combined with a standardized operating procedure to achieve accurate measurement of the grain's pressure resistance. By selecting the pressure gauge 7, designing the sample injection unit 2, controlling the movement distance of the rocker arm 6, and accurately positioning the center position of the grain during the test, the consistency and accuracy of the test results are ensured.

[0044] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 In this embodiment, the infrared alarm limit device 13 is installed 5cm above the sample placement base 11 on the left side of the worktable 5. During the measurement process, when the probe 15 descends to the set distance, the infrared alarm limit device 13 sounds a beep to remind the operator to slowly and precisely control the amplitude of the rocker arm 6 so that the probe 15 can slowly and steadily contact the sorghum grains, reduce subjective operation differences, and ensure accurate measurement results.

[0045] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 In this embodiment, the sample loading device 9 and the funnel 8 are combined to form the sample injection unit 2; sorghum grains are randomly selected for testing to avoid subjective operation affecting the experimental results; during the measurement process, one sorghum grain is passed through the sample loading device 9 into the retractable sample injection pipe 10 at a time to avoid manual repetitive operation and achieve rapid sample loading and continuous detection.

[0046] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 In this embodiment, sample fixing units 3 with different aperture sizes 12 are selected according to the sample type and installed above the sample placement base 11. This fixes the sample in the vertical path of the test probe 15, simplifying the measurement operation, quickly positioning the sample, and improving detection efficiency.

[0047] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 In this embodiment, the systematic device design and standardized testing process solve the problem that traditional sorghum grain stress resistance assessment relies on manual sensory evaluation and is highly subjective. Furthermore, the method improves the scientificity and reliability of the measurement by using quantitative indicators to perform statistical analysis on the test results. At the same time, the device has a simple structure and is easy to operate, making it easy to promote to relevant agricultural and industrial testing scenarios, and has significant technological innovation and practical application value.

[0048] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 In this embodiment, the structural design and parameter settings of the pressure testing unit 1 are adopted, including but not limited to the infrared alarm limit device 13, the sample injection unit 2, and the sample placement base 11; at the same time, the present invention can also be applied to the pressure resistance testing of other grains or granular materials.

[0049] Example 2 See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 Based on Example 1, in this example: A. Prepare a pressure testing device. According to the experimental requirements, select a 500 pressure gauge 7 and assemble it on the workbench 5 with a rocker arm 6. The rocker arm 6 can move up and down a distance of more than 10 cm.

[0050] B. Testing: Randomly weigh approximately 2g of sorghum grains of uniform maturity and place them in the sample feeding device. Move the end of the retractable sample feeding tube 10 to the center of the sample fixing unit 3. Pull the lever 20, and a sorghum grain enters the retractable sample feeding tube 10. Then release the lever, and the sorghum grain is knocked into the aperture 12 of the sample fixing unit 3. Start the pressure testing unit 1. When the probe 15 moves downward a distance of 10cm, the infrared alarm limit device 13 is triggered. The operator will slowly swing the rocker arm 6 to make the probe 15 press down steadily until the grain breaks. Record the maximum pressure value displayed by the pressure gauge 7. Repeat the test for no less than twenty grains, and use the average value as the pressure resistance test result of the sample.

[0051] C. Method stability test: To verify the stability of this method, samples of sorghum grains from the same batch were selected for testing. The relative deviations of each physical property parameter were calculated, and the stability was determined by the relative deviations. The specific experimental data are shown in Table 1 below.

[0052] Table 1

[0053] Test data demonstrates that this method exhibits good repeatability and stability. Furthermore, compared to traditional sensory evaluation methods, this method provides more accurate and objective data, eliminating errors caused by human judgment and demonstrating strong practicality and promotional value. The implementation of this method effectively fills the technological gap in the quantitative testing of sorghum compressive strength, providing a scientific basis for sorghum quality evaluation systems and offering key technical support for the screening of brewing raw materials and the optimization of processing techniques. This method is not only applicable to the evaluation of the compressive strength of sorghum raw materials in the brewing industry but can also be extended to the testing of mechanical properties of other grains and granular materials, showing broad application prospects.

[0054] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A device for rapid determination of the compressive strength of sorghum grains, characterized in that: It includes a pressure testing unit (1), a sample injection unit (2), a sample fixing unit (3), and a limit alarm unit (4); The pressure testing unit (1) includes a workbench (5), a rocker arm (6) and a pressure gauge (7), wherein the rocker arm (6) is connected to the workbench (5) in a transmission manner; The sample injection unit (2) includes a funnel (8), a sample loading device (9), and a retractable sample injection pipe (10). The sample loading device (9) is connected to the funnel (8). One end of the retractable sample injection pipe (10) is connected to the funnel (8), and the other end is movably adapted to the center position of the sample placement base (11). The sample fixing unit (3) is installed above the sample placement base (11), and the sample fixing unit (3) is provided with a hole diameter (12) adapted to sorghum grains; The limit alarm unit (4) is an infrared alarm limit device (13). The infrared alarm limit device (13) is installed five centimeters above the sample placement base (11) on the side of the workbench (5). The pressure gauge (7) has a pressure shaft (14) driven by the rocker arm (6) in the axial direction. The bottom end of the pressure shaft (14) has a probe (15).

2. The device for rapid testing of the compressive strength of sorghum grains according to claim 1, characterized in that: The pressure gauge (7) has a range of 500N and a measurement accuracy of not less than 0.01N.

3. The device for rapid testing of the compressive strength of sorghum grains according to claim 1, characterized in that: The sample loading device (9) has a partition (16) installed in the middle of the funnel (8). The partition (16) has a hole (17) on its axis. A tube (18) is installed at the lower part of the partition (16). A hole (19) is opened on the side wall of the tube (18) corresponding to the hole (17). A slidable rod (20) is provided in the tube (18). One end of the rod (20) is close to the funnel (8) and located in the tube (18). The other end of the rod (20) passes through the tube (18) and is away from the funnel (8). A handle (21) is connected to the other end of the rod (20).

4. The device for rapid testing of the compressive strength of sorghum grains according to claim 1, characterized in that: The sample fixing unit (3) has several models, and the aperture (12) of the sample fixing unit (3) is different for each model.

5. The device for rapid testing of the compressive strength of sorghum grains according to claim 1, characterized in that: The infrared alarm limit device (13) has a self-powered power supply.

6. A method for determining the compressive strength of sorghum grains using the rapid compressive strength testing device according to any one of claims 1 to 5, characterized in that: Includes the following steps: Step 1, Sample preparation: Randomly weigh 2g of sorghum grains with uniform maturity and set aside. Step 2, device debugging: Assemble and debug the measuring device according to claim 1 to ensure that the rocker arm (6) moves smoothly, the infrared alarm limit device (13) responds normally, and the pressure gauge (7) displays accurately. Step 3, sample injection: Place the sample prepared in step 1 into the funnel (8) of the injection unit (2), pull and push the loading device (9) so that a sorghum grain is pushed into the retractable injection pipe (10) by the loading device (9), and the sorghum grain is knocked into the sample fixing unit (3). Step 4, pressure test: Start the pressure test unit (1) to move the pressure shaft (14) downward. When the probe (15) of the pressure shaft (14) moves synchronously by 10cm, the infrared alarm limit device (13) will sound an alarm. The operator will slowly swing the rocker arm (6) to make the probe (15) of the pressure shaft (14) press down steadily until the sorghum grains are broken. Record the maximum pressure value displayed by the pressure gauge (7). Step 5: Calculate the results. Repeat steps 3 and 4, testing no fewer than 20 sorghum grains. The average of all test results is taken as the compressive strength test result of the sample.

7. The method for determining the compressive strength of sorghum grains using a rapid testing device according to claim 6, characterized in that: In step one, the maturity criteria for sorghum grain samples are that the grains are plump, uniform in color, and free from damage, mold, and insect infestation.

8. The method for determining the compressive strength of sorghum grains using a rapid testing device according to claim 6, characterized in that: In step four, the probe (15) is pressed down smoothly at a speed of 0.5 cm / s to 1 cm / s.

9. The method for determining the compressive strength of sorghum grains using a rapid testing device according to claim 6, characterized in that: During repeated testing, the time interval between two consecutive tests shall not exceed 30 seconds.

10. The method for determining the compressive strength of sorghum grains using a rapid testing device according to claim 6, characterized in that: In step three, the distance between the end of the retractable sample inlet pipe (10) and the sample fixing unit (3) is controlled between 1cm and 3cm to avoid damage caused by collision during the falling of the grains.

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