Method and system for measuring hardness of soap

Abstract

The invention relates to the technical field of hardness measurement, in particular to a method and system for measuring the hardness of perfumed soap, and the method comprises the steps: determining the original appearance of the perfumed soap to be measured, and a holding part and a using part of the perfumed soap; the to-be-detected soap is fixed through the holding part, and the corresponding holding direction is determined; determining a use normal direction and a use tangential direction of the to-be-detected soap according to the holding direction; determining the test appearance of the to-be-tested soap, comparing the test appearance with the original appearance, and classifying the soap according to the comparison result; and in response to completion of classification of the to-be-detected soap, re-determining the holding part and the using part of the to-be-detected soap. A mode of setting a normal test and a tangential test is utilized to simulate a scene of holding and using the perfumed soap by a hand, so that the hardness test of the perfumed soap is fused with the scene, and a measurement result can more truly reflect the anti-deformation capability of the perfumed soap in the using process, so that the hardness data with higher practical value is obtained, and meanwhile, the test accuracy is improved. And the effectiveness of the measurement result is effectively improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of physical hardness measurement, in particular to a method for measuring the hardness of soap and a measuring system thereof. BACKGROUND

[0002] The hardness of soap is a key quality indicator in the production of soap. Measuring the hardness of soap can prevent the occurrence of conditions such as difficulty in use due to excessive hardness or deformation and breakage due to excessive softness, thereby maintaining the high quality and stability of the product.

[0003] Soap with appropriate hardness has abundant foam, is easy to apply, and is not prone to breaking, which can effectively improve the user's experience.

[0004] Chinese Patent No. CN214503212U discloses a soap hardness detection device, which relates to the field of soap technology. It includes a base, a limiting device on the base, a support rod on the limiting device, a sliding block on the support rod, and a detection device on the sliding block. The support rod is arranged along the height direction of the base, and the support rod penetrates the sliding block and is connected with the limiting device. The detection device includes a detection rod and a detection tray. The detection rod includes an upper threaded section, a detection section, and a lower threaded section. The detection section penetrates the sliding block, the upper threaded section is connected with the detection tray, and the lower threaded section is used for hardness testing of soap. The detection rod is axially parallel to the support rod. The application presses the soap sample to be tested by the weight of the detection tray and the detection rod, causing the surface of the soap sample to be tested to deform. The hardness of the soap is determined by measuring the indentation, reducing the influence of human experience, and improving the accuracy of soap hardness detection.

[0005] Chinese Patent No. CN118090404B discloses a tablet detection device, which relates to the technical field of testing the strength characteristics of solid materials with mechanical stress. It includes a base plate, a bearing part on the base plate, a detection mechanism on the base plate, and a detection head on the detection mechanism. The bearing part provides a carrier for the array placement of tablets, making it easy to store and transfer the tablets during detection. The detection mechanism facilitates hardness detection of the tablets, and the detection head can actively cause tablets with micro-cracks to crack during detection, thereby selecting out tablets with micro-cracks and ultimately improving the quality of packaged tablets while improving detection efficiency and accuracy. Of course, it also detects tablets with substandard hardness.

[0006] However, the above method has the following problems: it cannot be based on the stress direction in the actual use scenario, resulting in a decrease in the effectiveness of the measurement results, and thus the measurement results of the soap do not match the real use experience. SUMMARY

[0007] To this end, the present application provides a method for measuring the hardness of soap and a measuring system thereof, so as to overcome the problem that the hardness of soap cannot be measured according to the stress direction in the actual use scenario in the prior art, thereby reducing the effectiveness of the measurement result.

[0008] To achieve the above-mentioned object, in one aspect, the present application provides a method for measuring the hardness of soap, comprising: Step S1, determining the original appearance of the soap to be measured, and the holding part and the use part of the soap; Step S2, fixing the soap to be measured by using the holding part, and determining the corresponding holding direction; Step S3, determining the use normal and the use tangent of the soap to be measured according to the holding direction; Step S4, determining the test appearance of the soap to be measured, comparing the test appearance with the original appearance, and classifying the soap according to the comparison result; Step S5, in response to the completion of the classification of the soap to be measured, re-determining the holding part and the use part of the soap to be measured.

[0009] Further, in the testing process, the use normal and the use tangent determined according to the appearance of the soap are included; performing normal testing on the soap according to the use normal; and performing tangential testing on the soap according to the use tangent; wherein the normal testing is to apply a test pressure to the use part with the use normal as the reference direction; the tangential testing is to apply a test pressure to the use part with the use tangent as the reference direction; the direction of the test pressure in a single test is the reference direction, and the size of the test pressure is selected within the test range.

[0010] Further, in the step S3, further comprising: the normal testing according to the use normal is to determine the holding hardness of the holding part; and the tangential testing according to the use tangent is to determine the use hardness of the use part; wherein the holding hardness is represented by the corresponding test pressure when the holding part does not have obvious deformation; the use hardness is represented by the corresponding test pressure when the use part does not have obvious deformation.

[0011] Further, in the step S4, when comparing the test appearance with the original appearance, if the comparison result of the test appearance and the original appearance of the holding part or the use part is that the deformation amount is not greater than a preset deformation threshold, the soap to be measured is determined as a hard soap. If the comparison result of the holding part or the using part of the test appearance and the original appearance is that the deformation amount is greater than the preset deformation threshold, the soap to be tested is determined as a soft soap; If the comparison result of the holding part and the using part of the test appearance and the original appearance is that the deformation amount is greater than the preset deformation threshold, it is determined that the soap to be tested is too soft and the hardness is unqualified.

[0012] Further, in the step S1, the step of determining the holding part includes: determining a central axis of the soap according to the appearance of the soap to be tested; setting a surface of the soap to be tested around the central axis as the holding part, and a surface intersecting with the central axis as the using part; or, setting a surface of the soap to be tested around the central axis as the using part, and a surface intersecting with the central axis as the holding part; or, setting a surface of the soap to be tested around the central axis as the holding part, and any flat surface away from the holding part as the using part; wherein the central axis passes through the center of gravity of the soap to be tested.

[0013] Further, in the step S2, the step of determining the holding direction includes: determining a concave surface of the soap to be tested; determining a concave surface symmetrical to the central axis around the central axis; taking the line connecting the lowest point of each concave surface and the central axis as a holding base line; taking the holding base line as a reference, and taking the corresponding direction pointing to the central axis as the holding direction; wherein each projection of each holding direction on a plane perpendicular to the central axis is symmetrical to the corresponding point of the central axis on the plane.

[0014] Further, in the step S3, the using normal is a direction perpendicular to the surface of the using part and pointing to the inside of the soap; the using tangent is a direction parallel to the surface of the using part and perpendicular to the central axis; wherein in the tangent test, the direction of the test pressure is consistent with the using tangent, the test head moves along the surface of the using part at a preset speed, and the contact pressure with the using part is kept preset during the movement.

[0015] On the other hand, the present application also provides a soap hardness measuring system, comprising: a measuring module provided with a plurality of test heads for measuring the hardness of the soap; a posture module for adjusting the position of the soap; It is characterized in that further comprising a shape module for determining the appearance of the soap; a test server for determining the holding part and the using part; For a single soap to be tested, the test server controls the posture module to hold the holding part, and aligns the using part of the soap to be tested with the measurement module.

[0016] Further, the measurement module comprises: a pressure tester for applying a test pressure to the soap to be tested in a preset direction; and a positioning module for fixing the using part of the soap to be tested; For a single soap to be tested, the preset direction comprises a normal direction to the using part and a tangential direction to the using part.

[0017] Further, when a single test is completed, the shape module re-determines the appearance of the soap that has completed the test, and generates a corresponding test appearance; The server compares the test appearance with the appearance of the soap to be tested, forms and records the hardness test data of the soap.

[0018] Compared with the prior art, the beneficial effects of the present application are that, by confirming the using part and the holding part of the soap, and setting the normal test and the tangential test, the scenario of holding and using the soap by hand is simulated, so that the hardness test of the soap is integrated with the scenario, the measured result can more truly reflect the anti-deformation ability of the soap during use, thereby obtaining hardness data with more practical value while effectively improving the effectiveness of the measured result.

[0019] Further, by classifying the soap according to hardness and repeating the test, the hardness change of the soap during use can be determined, and the hardness data of the soap during the entire use cycle can be confirmed, thereby effectively improving the effectiveness of the measured result.

[0020] Further, by setting the central axis to determine the holding part and the using part of the soap, and according to the function division of the holding part and the using part, the grip position during the hardness test is determined, thereby improving the anti-deformation ability of the soap in the use scenario while effectively improving the effectiveness of the measured result.

[0021] Further, by setting the test head and testing respectively according to the test direction, the breadth of the test is effectively improved, and the problem of incomplete test result caused by single test direction is avoided, thereby effectively improving the effectiveness of the measured result.

[0022] Compared with the prior art, the beneficial effects of the present application are that, by arranging the measurement module, the posture module and the appearance module and being controlled by the test server, the holding part can be automatically recognized and clamped, the use part is aligned with the test module, the appearance can be re-detected after the hardness measurement is completed, and a report is generated, so that the measurement result can more truly reflect the anti-deformation ability of the soap during use, thereby obtaining more practical hardness data while effectively improving the effectiveness of the measurement result. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 a flow chart of the soap hardness measurement method of the present application; Figure 2 a schematic diagram of the original state of the soap of the embodiment of the present application; Figure 3 a schematic diagram of the intermediate state of the soap of the embodiment of the present application; Figure 4 a schematic diagram of the structure of the soap hardness measurement system of the present application; wherein: 1, use part; 2, holding part; 3, use normal; 4, use tangent. DETAILED DESCRIPTION

[0024] In order to make the purpose and advantages of the present application clearer and more apparent, the present application will be further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0025] The preferred embodiments of the present application will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present application and are not intended to limit the protection scope of the present application.

[0026] It should be noted that in the description of the present application, the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicate the direction or positional relationship terms based on the direction or positional relationship shown in the drawings, which are only for the convenience of description and do not indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0027] In addition, it should also be noted that in the description of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements inside. Those skilled in the art can understand the specific meaning of the above terms in the present application according to the specific circumstances.

[0028] Referring to Figure 1 Fig. 1 is a flowchart of a method for measuring the hardness of a soap according to the present application, which comprises the following steps: Step S1, determining the original appearance of the soap to be measured, and the holding part and the using part of the soap; Step S2, fixing the soap to be measured by the holding part, and determining the corresponding holding direction; Step S3, determining the using normal and the using tangent of the soap to be measured according to the holding direction; Step S4, determining the test appearance of the soap to be measured, comparing the test appearance with the original appearance, and classifying the soap according to the comparison result; Step S5, in response to the completion of the classification of the soap to be measured, re-determining the holding part and the using part of the soap to be measured.

[0029] Specifically, in the test process, the using normal and the using tangent determined according to the appearance of the soap are included; the soap is tested in the normal direction according to the using normal; and the soap is tested in the tangent direction according to the using tangent; wherein the normal test is to apply a test pressure to the using part with the using normal as the reference direction; the tangent test is to apply a test pressure to the using part with the using tangent as the reference direction; the direction of the test pressure of a single test is the reference direction, and the size of the test pressure is selected within the test range.

[0030] By confirming the using part and the holding part of the soap, and setting the normal test and the tangent test, the scenario of holding and using the soap by hand is simulated, so that the hardness test of the soap is integrated with the scenario, the measured result can more truly reflect the deformation resistance of the soap in the use process, thereby obtaining hardness data with more practical value while effectively improving the effectiveness of the measured result. Embodiment 1:

[0031] Test object: a soap in the shape of a cuboid, one larger rectangular face of which is defined as the using part.

[0032] The preset threshold value of this type of soap is set to 1mm.

[0033] Test process: The system determines the original appearance of the soap by the 3D camera, and identifies one flat face with an area of 80mm x 50mm as the "using part".

[0034] The opposite face (the holding part) is then stably clamped by the clamp.

[0035] The system calculates that the corresponding use normal of the use portion when using the use portion is a vector that is perpendicular to the plane and points to the inside of the soap.

[0036] Normal test: A circular flat head with a diameter of 20 mm approaches the use portion plane at a speed of 5 mm / min along the use normal direction.

[0037] When the head contacts the soap and the initial contact force is measured to be 0.1 N, the system defines this point as the displacement zero point.

[0038] The head continues to move along the normal direction to apply pressure to the soap. The pressure value starts from 0 N and increases linearly.

[0039] The system monitors the pressure and deformation curve in real time. When it is monitored that the displacement amount suddenly and sharply increases when the pressure reaches 65 N, it is determined that the yield strength of the soap is reached, and the test is automatically stopped at this time.

[0040] The "use hardness" (yield strength) of the use portion of this soap is measured to be 65 N by this normal test.

[0041] After the test, the system rescans and finds that a 0.5 mm deep indentation appears on the use portion plane. Comparing this deformation amount with the preset threshold value of 1 mm, it is determined that the deformation amount 0.5 mm < 1 mm, so the soap is classified as "hard soap". Example 2:

[0042] Test object: a piece of soap with a wavy pattern decorative surface, in which the raised ridge of one of the patterns is defined as the use portion.

[0043] The preset threshold value of this type of soap is set to 0.3 mm.

[0044] Test process: The system identifies a continuous raised ridge on the surface of the soap with a height of 2 mm and a width of 5 mm as the "use portion" to be tested. The clamp clamps the soap from the side to fix it.

[0045] The system calculates that the direction tangent to the top end of the raised ridge is the use tangent (simulating the sliding direction when the hand is wiped).

[0046] Tangent test execution: A hemispherical test head with a radius of 1 mm first lightly contacts the top end of the raised ridge along the normal direction and applies a constant pre-pressure of 2 N to simulate the pressing force when using.

[0047] While maintaining this 2 N normal pressure, the test head starts to move along the use tangent direction at a speed of 100 mm / min.

[0048] The sensor continuously measures the tangential resistance (a shear force) generated by the friction between the test head and the soap surface during the movement.

[0049] The test head stops after sliding 10 mm. The system records an average tangential resistance of 0.8 N during the entire sliding process, and it is observed that the resistance value remains relatively stable during the sliding process.

[0050] The tangential test measures the "use hardness" (shear strength) of the soap protrusion under a normal pressure of 2 N, which is an average friction of 0.8 N.

[0051] After the test, a re-scan is performed, and it is found that the protruding ridge has visible wear and tear, with a height reduction of 0.4 mm. Comparing this deformation value with the preset threshold value of 0.3 mm, it is determined that the deformation value 0.4 mm > 0.3 mm, and therefore the soap is classified as a "soft soap".

[0052] Specifically, in step S3, further comprising: performing a normal test according to the use normal to determine the grip hardness of the grip portion; and performing a tangential test according to the use tangential to determine the use hardness of the use portion; wherein the grip hardness is represented by the test pressure corresponding to no obvious deformation of the grip portion; the use hardness is represented by the test pressure corresponding to no obvious deformation of the use portion.

[0053] Specifically, in step S4, when comparing the test appearance with the original appearance, if the comparison result of the grip portion or the use portion of the test appearance and the original appearance is that the deformation value is not greater than the preset deformation threshold value, the soap to be tested is determined to be a hard soap; if the comparison result of the grip portion or the use portion of the test appearance and the original appearance is that the deformation value is greater than the preset deformation threshold value, the soap to be tested is determined to be a soft soap; if the comparison result of the grip portion and the use portion of the test appearance and the original appearance is that the deformation value is greater than the preset deformation threshold value, it is determined that the soap to be tested is too soft and the hardness is unqualified.

[0054] By classifying the soap according to the hardness and performing repeated tests, the hardness of the soap during use can be determined, thereby confirming the hardness data of the soap during the entire use cycle, thereby effectively improving the effectiveness of the measurement results. Example 3:

[0055] Test object and settings: A standard rectangular soap bar, 100mm in length, 60mm in width, and 30mm in height. Define its two 100mm x 60mm large faces as the usage part, and the two 100mm x 30mm side faces as the holding part. The preset obvious deformation threshold AL is 0.3mm.

[0056] Test procedure and results: The mechanical clamp holds one holding part (100mm x 30mm), and exposes the other holding part on the opposite side for testing.

[0057] Normal test: A circular pressure head with an area of 50mm2 applies pressure along the normal direction of the exposed holding part surface.

[0058] The pressure starts from 0N and increases uniformly. When the system detects that the holding part surface has deformed by 0.3mm, it records the pressure value at that moment as 75N.

[0059] The measured holding hardness is 75N.

[0060] Deformation comparison and classification: After the test is completed, the 3D scanner immediately scans the tested holding part.

[0061] Compare the test appearance with the original appearance, and calculate the maximum deformation amount as 0.28mm.

[0062] The deformation amount 0.28mm is less than the preset threshold 0.3mm, and the system automatically determines the soap bar as a hard soap. Example 4:

[0063] Test object and settings: A spherical soap bar. Define its entire outer surface as the usage part, and fix it from the inside by the clamp during testing (no specific holding part). The preset “obvious deformation” threshold (wear depth AD) is 0.1mm.

[0064] Test procedure and results: The clamp fixes the spherical soap bar from the inside, so that part of its outer surface (usage part) faces upwards and can be tested.

[0065] Tangential test: The test head first applies a constant pressure of 10N along the normal direction to the usage part surface.

[0066] Subsequently, the test head moves along the tangential direction of the usage (the tangent direction at this point), with a stroke of 50mm, simulating the wiping action.

[0067] During the movement, the sensor detects that the average tangential force (friction) required to maintain sliding is 3.5N. At this time, the laser range finder measures the wear depth of the surface in real time as 0.12mm.

[0068] Measured using hardness: 3.5N (10N) (i.e. the shear deformation resistance is 3.5N under 10N normal pressure).

[0069] Deformation ratio comparison and classification: After the test is completed, the 3D scanner scans the use part surface on the test path with high precision.

[0070] The test appearance is compared with the original appearance, and the maximum wear depth is calculated to be 0.12mm.

[0071] Determination: deformation amount 0.12mm> preset threshold 0.1mm, the system automatically determines the block of soap as soft soap.

[0072] Specifically, in step S1, the step of determining the holding part includes: determining the central axis of the soap according to the appearance of the soap to be tested; setting the surface of the soap to be tested around the central axis as the holding part, and the surface intersecting the central axis as the use part; or, setting the surface of the soap to be tested around the central axis as the use part, and the surface intersecting the central axis as the holding part; or, setting the surface of the soap to be tested around the central axis as the holding part, and any flat surface away from the holding part as the use part; wherein the central axis passes through the center of gravity of the soap to be tested.

[0073] Specifically, in step S2, the step of determining the holding direction includes: determining the concave surface of the soap to be tested; determining the concave surface symmetrical along the central axis around the central axis; taking the line connecting the lowest point of each concave surface and the central axis as the holding base line; taking the holding base line as the reference, and taking the corresponding direction pointing to the central axis as the holding direction; wherein each projection of each holding direction on a plane perpendicular to the central axis is symmetrical with the corresponding point of the central axis on the plane.

[0074] The holding part and the use part of the soap are determined by setting the central axis, and the grip position during the hardness test is determined according to the function division of the holding part and the use part, which effectively improves the effectiveness of the measurement results while improving the deformation resistance of the soap in the use scenario.

[0075] Specifically, in step S3, the normal direction is the direction perpendicular to the surface of the use part and pointing to the inside of the soap; the tangential direction is the direction parallel to the surface of the use part and perpendicular to the central axis; In the tangential test, the direction of the test pressure is consistent with the tangential direction, the test head moves along the surface of the use part at a preset speed, and the contact pressure with the use part is maintained during the movement.

[0076] By setting the test head and testing in different directions, the effectiveness of the measurement results is effectively improved while the breadth of the test is effectively improved, and the problem of incomplete test results caused by single test direction is avoided.

[0077] It can be understood that due to different processes or molds, the shape of the soap also changes, such as: For an oval soap I. Determine the central axis, holding part and use part: A standard oval soap: The system obtains its point cloud data by 3D scanning, calculates its geometric center and gravity center, and fits the major axis as the central axis (the axis passes through the gravity center).

[0078] The surface of the soap to be tested around the central axis is set as the holding part, and the surface intersecting the central axis is set as the use part.

[0079] The system defines the entire smooth surface around the central axis (i.e. the side surface of the ellipsoid) as the holding part. The two end surfaces intersecting the central axis (i.e. the two top surfaces of the ellipsoid) are defined as the use part.

[0080] II. Determine the holding direction: Identify the concave surface: the system analyzes the holding part (the entire curved surface) and finds that the curvature is continuous and there is no obvious local concave. Therefore, the system simulates the region with the largest curvature and the most suitable for holding as a continuous "concave surface".

[0081] Determine the symmetry point and holding base line: the system virtually determines two symmetrical holding points around the central axis. Connecting the two virtual holding points (the lowest points of the concave surface) with the central axis obtains two holding base lines A and B.

[0082] Calculate the holding direction: taking the holding base line as the reference, the holding direction is defined as the direction from the two holding points to the central axis. The base line A corresponds to the direction A, and the base line B corresponds to the direction B. The projections of the two directions on the plane perpendicular to the central axis are symmetric about the central axis.

[0083] At this time, the mechanical clamps will exert clamping force along the two symmetrical holding directions, i.e. direction A and direction B, to stably fix the soap.

[0084] For a soap with irregular shape: I. Determine the central axis, holding part and use part: A soap in the shape of a rough cat.

[0085] After scanning, the system calculates the center of gravity G and fits a central axis from the neck to the pelvic bone of the cat shape as the central axis.

[0086] The surface of the soap to be measured around the central axis is set as the holding part, and any flat surface away from the holding part is set as the use part.

[0087] The system defines the torso side surface (including the concave part of the waist) around the central axis as the holding part. A relatively flat area of the cat's front chest or back is defined as the use part.

[0088] II. Determine the holding direction: Identify the concave surface: the system analyzes the holding part surface and clearly identifies two natural concave surfaces on both sides of the waist, symmetric about the central axis.

[0089] Determine the symmetry point and holding base line: the system finds the lowest points L and R of the left and right concave surfaces. Connect L and the central axis to get the holding base line L; similarly, get the holding base line R.

[0090] With the holding base lines L and R as the reference, the holding direction is defined as the direction L and direction R pointing from L and R to the central axis. The projections of these two directions on the cross section perpendicular to the central axis are perfectly symmetric about the central axis.

[0091] At this time, the two contacts of the mechanical gripper will move precisely to L and R and apply pressure along the two symmetric directions L and R, naturally "pinching" the waist of the soap, achieving the most stable and non-slip fixation.

[0092] It should be particularly noted that for different use states of the same soap, the above method can also be used to determine them, such as: Please refer to Figure 2 , which is a schematic diagram of the original state of the soap of the embodiment of the present application. I. Determine the central axis, holding part and use part: A soap as shown in the figure.

[0093] The system obtains point cloud data of the soap by 3D scanning, calculates the geometric center and center of gravity, and fits a long axis as the central axis (the axis passes through the center of gravity).

[0094] The surface of the soap to be measured around the central axis is set as the holding part 2, and the surface intersecting the central axis is set as the use part 1.

[0095] The system defines the entire smooth surface (i.e. two side surfaces) around the central axis as the holding part 2. The two end surfaces (i.e. two top surfaces) intersecting the central axis are defined as the use part 1.

[0096] II. Determine the holding direction: Identify the concave surface: the system analyzes the holding part (the whole curved surface) and finds that it includes two obvious local concave parts. Therefore, the system simulates the region with the maximum curvature, which is the most suitable for holding, as a continuous "concave surface".

[0097] Determine the symmetry point and the holding base line: the system virtually generates two symmetrical holding points around the central axis. Connecting the two virtual holding points (the lowest points of the concave surface) with the central axis, two holding base lines A and B are obtained.

[0098] Calculate the holding direction: taking the holding base line as the reference, the holding direction is defined as the direction from the two holding points to the central axis. The direction corresponding to the base line A is direction A, and the direction corresponding to the base line B is direction B. The projections of the two directions on the plane perpendicular to the central axis are exactly symmetrical about the central axis, which is denoted as holding part 2. At this time, when performing the test, the normal test is performed using the normal 3, and the tangential test is performed using the tangent 4. Please refer to Figure 3 , which is a schematic diagram of the intermediate state of the soap according to the embodiment of the present application. The difference between the present application and Figure 2 is that after using the soap for a period of time, part of the use part 1 becomes a plane. At this time, the system determines that the plane is the use part 1. At this time, under the premise that the holding part 2 does not change, the normal test is performed on it using the new use normal 3, which is perpendicular to the use part 1 that becomes a plane and passes through the geometric center of the plane. And the tangential test is performed on it using the new use tangent 4, which is parallel to the use part 1 that becomes a plane.

[0099] According to the above test method, the changes of the soap during use can be known.

[0100] Please refer to Figure 4 , which is a structural schematic diagram of the soap hardness measurement system according to the present application, comprising: A measurement module provided with a plurality of test heads for measuring the hardness of the soap; A posture module for adjusting the position of the soap; characterized in that it further comprises a shape module for determining the appearance of the soap; A test server for determining the holding part and the use part; For a single soap to be tested, the test server controls the posture module to hold the holding part, and aligns the use part of the soap to be tested with the measurement module.

[0101] By setting the measurement module, the posture module and the appearance module, and being controlled by the test server, the grip part can be automatically recognized and clamped, the use part is aligned with the test module, and the appearance can be re-detected after the hardness measurement is completed to generate a report, so that the measurement result can more truly reflect the anti-deformation ability of the soap during use, thereby obtaining more practical hardness data and effectively improving the effectiveness of the measurement result.

[0102] Specifically, the measurement module comprises: a pressure tester configured to apply a test pressure to the soap in a preset direction; and a positioning module configured to fix the use part of the soap. For a single soap, the preset direction includes a normal direction of the use part and a tangential direction of the use part.

[0103] Specifically, when a single test is completed, the appearance module re-determines the appearance of the soap after the test and generates a corresponding test appearance. The server compares the test appearance with the appearance of the soap to be tested to form and record the hardness test data of the soap.

[0104] So far, the technical solutions of the present application have been described in conjunction with the preferred embodiments shown in the drawings, but those skilled in the art can easily understand that the protection scope of the present application is obviously not limited to these specific embodiments. Those skilled in the art can make equivalent changes or replacements to the related technical features without departing from the principles of the present application, and the technical solutions after the changes or replacements will fall within the protection scope of the present application.

[0105] The above description is only the preferred embodiments of the present application and is not intended to limit the present application; for those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A method of measuring the hardness of a soap bar, characterized by, During the test, a use normal and a use tangent are determined according to the appearance of the soap; perform a normal test on the soap according to the use normal; and perform a tangent test on the soap according to the use tangent; the normal test is to apply a test pressure to the use part with the use normal as a reference direction; the tangent test is to apply a test pressure to the use part with the use tangent as a reference direction; the direction of the test pressure in a single test is the reference direction, and the magnitude of the test pressure is selected within a test range.

2. The method of soap hardness measurement according to claim 1, characterized in that, comprising: Step S1, determining the original appearance of a to-be-tested soap, and a holding part and a use part of the soap; Step S2, fixing the to-be-tested soap by using the holding part, and determining a corresponding holding direction; Step S3, determining a use normal and a use tangent of the to-be-tested soap according to the holding direction; Step S4, determining a test appearance of the to-be-tested soap, comparing the test appearance with the original appearance, and classifying the soap according to a comparison result; Step S5, in response to completion of the classification of the to-be-tested soap, re-determining the holding part and the use part of the to-be-tested soap.

3. The method of soap hardness measurement according to claim 2, wherein, In the step S3, further comprising: the normal test according to the use normal is to determine the holding hardness of the holding part; and the tangent test according to the use tangent is to determine the use hardness of the use part; wherein the holding hardness is represented by a corresponding test pressure when the holding part does not have a significant deformation; the use hardness is represented by a corresponding test pressure when the use part does not have a significant deformation.

4. The method of soap hardness measurement according to claim 3, wherein, In the step S4, when comparing the test appearance with the original appearance, if the comparison result of the test appearance and the original appearance of the holding part or the use part is that a deformation amount is not greater than a preset deformation threshold, the to-be-tested soap is determined as a hard soap; if the comparison result of the test appearance and the original appearance of the holding part or the use part is that a deformation amount is greater than a preset deformation threshold, the to-be-tested soap is determined as a soft soap; if the comparison result of the test appearance and the original appearance of the holding part and the use part is that a deformation amount is greater than a preset deformation threshold, it is determined that the to-be-tested soap is too soft and the hardness is unqualified.

5. The method of soap hardness measurement according to claim 4, wherein, In the step S1, the step of determining the holding part comprises: determining a central axis of the soap according to the appearance of the to-be-tested soap; setting a surface of the to-be-tested soap around the central axis as the holding part, and a surface intersecting with the central axis as the use part; or, setting a surface of the to-be-tested soap around the central axis as the use part, and a surface intersecting with the central axis as the holding part; or, setting a surface of the to-be-tested soap around the central axis as the holding part, and any flat surface away from the holding part as the use part; wherein the central axis passes through the center of gravity of the to-be-tested soap.

6. The method of soap hardness measurement according to claim 5, wherein, In the step S2, the step of determining the holding direction comprises: determining a concave surface of the to-be-tested soap; determining a concave surface symmetrical to the central axis around the central axis; taking a line connecting the lowest point of each concave surface and the central axis as a holding base line; taking the holding base line as a reference, and recording a corresponding direction pointing to the central axis as the holding direction; The projections of each holding direction on a plane perpendicular to the central axis are point-symmetric with respect to the point on the plane where the central axis passes through.

7. The method of soap hardness measurement according to claim 6, wherein, In the step S3, the normal direction is perpendicular to the surface of the use part and points to the inside of the soap; The tangential direction is parallel to the surface of the use part and perpendicular to the central axis; In the tangential test, the direction of the test pressure is consistent with the tangential direction, the test head moves along the surface of the use part at a preset speed, and the contact pressure with the use part is maintained at a preset value during the movement.

8. The soap hardness measurement system according to any one of claims 1-7, comprising: a measurement module provided with a plurality of test heads for measuring the hardness of the soap; a posture module for adjusting the position of the soap; characterized in that it further comprises a shape module for determining the appearance of the soap; a test server for determining the holding part and the use part; for a single soap to be tested, the test server controls the posture module to hold the holding part, and aligns the use part of the soap to be tested with the measurement module.

9. The soap hardness measuring system of claim 8, wherein, The measurement module comprises: a pressure tester for applying a test pressure to the soap to be tested in a preset direction; and a positioning module for fixing the use part of the soap to be tested; for a single soap to be tested, the preset direction includes the normal direction of the use part and the tangential direction of the use part.

10. The soap hardness measurement system of claim 9, wherein, When a single test is completed, the shape module re-determines the appearance of the soap after the test, and generates the corresponding test appearance; the server compares the test appearance with the appearance of the soap to be tested, forms and records the hardness test data of the soap.

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