Impact resistance detection method for glass lens of mechanical aiming lens

Abstract

The invention relates to the technical field of optical lens detection, in particular to a mechanical aiming lens glass lens impact resistance detection method, which comprises the following steps: acquiring parameter data of a to-be-detected mechanical aiming lens glass lens; determining an impact resistance detection center area of the glass lens based on the curvature and the shape rule degree of the glass lens of the mechanical aiming lens to be detected; determining an initial clamping position based on the deviation degree of the central area of the glass lens of the mechanical aiming lens to be detected and the shape feature tendency value of the edge area; determining whether the clamping position is re-determined based on whether the glass lens of the to-be-detected mechanical aiming lens after the single impact test is displaced and the deformation degree; and optimizing and determining a final clamping position based on the displacement direction of the to-be-detected glass lens of the mechanical aiming lens and the deformation distribution dense area. Through the method, the positioning accuracy of the detection area and the clamping position in the impact resistance detection of the glass lens of the mechanical aiming lens and the accuracy of the impact resistance detection of the glass lens of the mechanical aiming lens are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of optical lens detection, and particularly to a method for detecting the impact resistance of glass lenses of machine sighting lenses. Background Art

[0002] As a core component in fields such as weapon aiming, industrial inspection, and security monitoring, the impact resistance of the glass lenses of machine sighting lenses directly affects the reliability and use safety of the equipment. Traditional methods for detecting the impact resistance of lenses mostly use single parameters (such as dropping a ball from a fixed height for impact) or static tests, without considering the complex vibration-impact coupling conditions in actual applications (such as the superimposed collision of vehicle equipment's bumpy vibration and the recoil impact of military equipment after shooting), nor associating with the risk of functional failures such as airtightness and optical performance. In addition, existing detections do not conduct customized tests for the defect sensitivity of lenses made of special materials such as sapphire and glass-ceramics, as well as the differentiated requirements of different application scenarios (military, industrial, outdoor), resulting in the disconnection between the detection results and the actual failure modes, and it is difficult to meet the quality control requirements of high-precision and high-reliability equipment.

[0003] For example, the Chinese patent application publication number: CN112730109A discloses a detection device, particularly a device for detecting the impact resistance of tempered glass. The technical problem to be solved by this invention is: to provide a device for detecting the impact resistance of tempered glass that can automatically detect the impact resistance of tempered glass. A device for detecting the impact resistance of tempered glass includes: a bottom plate; a fixing component installed on the bottom plate; a testing component installed on the fixing component; a driving component installed on the testing component. This invention is equipped with a driving component, making the operation of the device simpler and more convenient. Only by controlling the start of the reduction motor can the device automatically detect the tempered glass, and at the same time, it can ensure that the detection force is consistent each time, thereby ensuring the accuracy of the detection results. Through the cooperation of the first wedge-shaped block and the second contact frame, the tempered glass will automatically move under the testing component, thus eliminating the need for manual control and reducing the burden on the staff.

[0004] However, the existing technology has the problem of inaccurate positioning of the detection area and clamping position in the impact resistance detection of the glass lenses of machine sighting lenses, resulting in low accuracy of the impact resistance detection of the glass lenses of machine sighting lenses. Summary of the Invention

[0005] Therefore, the present invention provides a method for detecting the impact resistance of glass lenses of machine sighting lenses to overcome the problem of low accuracy of the impact resistance detection of the glass lenses of machine sighting lenses caused by inaccurate positioning of the detection area and clamping position in the impact resistance detection of the glass lenses of machine sighting lenses in the prior art.

[0006] To achieve the above object, the present invention provides a method for detecting the impact resistance of glass lenses of machine sighting lenses, including:

[0007] Step S1, obtain the geometric characteristic parameter data, optical characteristic parameter data, and impact detection equipment parameter data of the glass lens of the machine sight to be detected;

[0008] Step S2, determine the impact-resistant detection center area of the glass lens of the machine sight to be detected based on the curvature of the glass lens of the machine sight to be detected and the degree of shape regularity of the glass lens of the machine sight to be detected;

[0009] Step S3, determine the initial clamping position of the glass lens of the machine sight to be detected based on the deviation degree between the impact-resistant detection center area and the preset impact-resistant detection center area and the shape feature tendency value of the edge area of the glass lens of the machine sight to be detected;

[0010] Step S4, conduct repeated impact tests on the clamped glass lens of the machine sight to be detected, and determine whether to re-determine the clamping position of the glass lens of the machine sight to be detected based on whether the glass lens of the machine sight to be detected is displaced after a single impact test and the degree of deformation of the glass lens of the machine sight to be detected;

[0011] Step S5, re-determine the clamping position of the glass lens of the machine sight to be detected based on the displacement direction of the glass lens of the machine sight to be detected and the densely distributed deformation area of the glass lens of the machine sight to be detected.

[0012] Further, in the step S2, determining the impact-resistant detection center area of the glass lens of the machine sight to be detected based on the curvature of the glass lens of the machine sight to be detected and the degree of shape regularity of the glass lens of the machine sight to be detected includes:

[0013] If the curvature of the glass lens of the machine sight to be detected is less than the preset curvature and the degree of shape regularity of the glass lens of the machine sight to be detected is greater than the preset shape regularity, determine the center position of the lens as the impact-resistant detection center area;

[0014] If the curvature of the glass lens of the machine sight to be detected is greater than or equal to the preset curvature or the degree of shape regularity of the glass lens of the machine sight to be detected is less than or equal to the preset shape regularity, determine the continuous area with the minimum curvature of the lens as the impact-resistant detection center area.

[0015] Further, the degree of shape regularity of the glass lens of the machine sight to be detected is determined by the standard deviation of the surface height of the lens, the preset curvature is determined according to the average value of the historical curvatures of several lenses of the same type, and the preset shape regularity is determined according to the historical average value of the shape regularities of several lenses of the same type.

[0016] Further, in the step S3, determining the initial clamping position of the to-be-detected aiming lens glass lens based on the deviation degree between the anti-shock detection center area and the preset anti-shock detection center area and the shape feature tendency value of the edge area of the to-be-detected aiming lens glass lens includes:

[0017] If the deviation degree between the anti-shock detection center area and the preset anti-shock detection center area is less than the preset deviation degree and the shape feature tendency value of the edge area of the to-be-detected aiming lens glass lens is less than the preset shape feature tendency value, determine to symmetrically select a number of support points along the boundary of the anti-shock detection center area as the initial clamping position with the anti-shock detection center area as the reference;

[0018] If the deviation degree between the anti-shock detection center area and the preset anti-shock detection center area is greater than or equal to the preset deviation degree or the shape feature tendency value of the edge area of the to-be-detected aiming lens glass lens is greater than or equal to the preset shape feature tendency value, determine to select the clamping position with the minimum stress concentration coefficient as the initial clamping position.

[0019] Further, the deviation degree between the anti-shock detection center area and the preset anti-shock detection center area is determined according to the deviation value between the center point of the anti-shock detection center area and the center point of the preset anti-shock detection center area. The preset deviation degree is determined according to the average value of the deviation degrees between the anti-shock detection center areas and the preset anti-shock detection center areas of several lenses of the same type. The shape feature tendency value is determined by the ratio of the standard deviation of the edge thickness to the mean value. The preset shape feature tendency value is determined according to the average value of the shape feature tendency values of the edge areas of several lenses of the same type.

[0020] Further, the stress concentration coefficient is determined according to the ratio of the maximum local stress to the nominal stress.

[0021] Further, in the step S4, determining whether to re-determine the clamping position of the to-be-detected aiming lens glass lens based on whether the to-be-detected aiming lens glass lens has displacement after a single shock test and the deformation degree of the to-be-detected aiming lens glass lens includes:

[0022] If the to-be-detected aiming lens glass lens has displacement after a single shock test or the deformation degree of the to-be-detected aiming lens glass lens is greater than the preset deformation degree, determine to re-determine the clamping position of the to-be-detected aiming lens glass lens.

[0023] Further, the deformation degree is determined by accurately measuring the planar area of the lens before and after the shock test and calculating the area difference. The preset deformation degree is determined according to the maximum allowable strain value of the to-be-detected lens.

[0024] Further, re - determining the clamping position of the to - be - detected iron - sight lens glass lens based on the deformation - distribution dense area of the to - be - detected iron - sight lens glass lens includes selecting the symmetric position of the non - deformation - distribution dense area as the clamping position.

[0025] Further, in the step S5, determining the clamping position of the to - be - detected iron - sight lens glass lens based on the displacement direction of the to - be - detected iron - sight lens glass lens includes:

[0026] Obtaining the displacement amount, displacement direction of the to - be - detected iron - sight lens glass lens after a single impact - resistance test, and the deformation - distribution dense area of the to - be - detected iron - sight lens glass lens;

[0027] According to the obtained displacement direction, judging the acting direction of the force on the lens during the impact process;

[0028] Based on the opposite direction of the acting direction of the force on the lens as the clamping - position line;

[0029] Based on the position with the minimum deformation degree on the clamping - position line as the clamping position.

[0030] Compared with the prior art, the beneficial effects of the present invention are as follows. The present invention determines the impact - resistance test central area of the to - be - detected iron - sight lens glass lens through the curvature of the to - be - detected iron - sight lens glass lens and the degree of shape regularity of the to - be - detected iron - sight lens glass lens. If the curvature of the to - be - detected iron - sight lens glass lens is less than the preset curvature and the degree of shape regularity of the to - be - detected iron - sight lens glass lens is greater than the preset shape - regularity degree, it indicates that the lens is relatively flat, and at the same time, the deviation between the shape of the lens and the ideal shape is small. The central position of the lens is accurately determined as the impact - resistance test central area. If the curvature of the to - be - detected iron - sight lens glass lens is greater than or equal to the preset curvature or the degree of shape regularity of the to - be - detected iron - sight lens glass lens is less than or equal to the preset shape - regularity degree, it indicates that the lens is relatively more curved, or the shape regularity of the lens is poor, and there are certain irregularities or deviations on the surface. The continuous area with the minimum curvature of the lens is accurately determined as the impact - resistance test central area. Through the above - mentioned method, the accuracy of the detection area and the clamping - position positioning in the impact - resistance test of the iron - sight lens glass lens and the accuracy of the impact - resistance test of the iron - sight lens glass lens are improved.

[0031] Furthermore, the present invention determines the initial clamping position of the glass lens of the to-be-detected aiming lens based on the deviation degree between the anti-impact detection center area and the preset anti-impact detection center area, and the shape feature tendency value of the edge area of the glass lens of the to-be-detected aiming lens. According to the fact that the deviation degree between the anti-impact detection center area and the preset anti-impact detection center area is less than the preset deviation degree and the shape feature tendency value of the edge area of the glass lens of the to-be-detected aiming lens is less than the preset shape feature tendency value, it indicates that the performance distribution of the lens is relatively stable within the key detection area of the design. Taking the anti-impact detection center area as the reference, several support points are symmetrically selected along the boundary of this area as the initial clamping position. According to the fact that the deviation degree between the anti-impact detection center area and the preset anti-impact detection center area is greater than or equal to the preset deviation degree or the shape feature tendency value of the edge area of the glass lens of the to-be-detected aiming lens is greater than or equal to the preset shape feature tendency value, it indicates that there is an obvious deviation between the actual anti-impact detection center area of the lens and the ideal area, and there may be local performance weak points. The clamping position with the minimum stress concentration coefficient is accurately determined and selected as the initial clamping position. By the above method, the accuracy of the detection area and the clamping position positioning in the anti-impact detection of the glass lens of the aiming lens and the accuracy of the anti-impact detection of the glass lens of the aiming lens are improved.

[0032] Furthermore, the present invention determines whether to re-determine the clamping position of the glass lens of the to-be-detected aiming lens based on whether the glass lens of the to-be-detected aiming lens has a displacement after a single impact test and the deformation degree of the glass lens of the to-be-detected aiming lens. According to the fact that the glass lens of the to-be-detected aiming lens has a displacement after a single impact test or the deformation degree of the glass lens of the to-be-detected aiming lens is greater than the preset deformation degree, a stress concentration phenomenon will occur in some parts. The secondary clamping position should avoid being selected in the stress concentration area because these areas have already borne a large amount of stress and are more likely to break when impacted again. The secondary clamping should be selected in the area where the stress distribution is relatively uniform to disperse the impact force and reduce the risk of the lens breaking in subsequent tests, thereby improving the accuracy of the anti-impact detection of the lens under different stress conditions. According to the fact that the glass lens of the to-be-detected aiming lens has no displacement after a single impact test and the deformation degree of the glass lens of the to-be-detected aiming lens is less than or equal to the preset deformation degree, it indicates that factors such as the clamping force and the clamping position can effectively limit the displacement of the lens, and it is accurately determined that there is no need to re-determine the clamping position of the glass lens of the to-be-detected aiming lens. By the above method, the accuracy of the detection area and the clamping position positioning in the anti-impact detection of the glass lens of the aiming lens and the accuracy of the anti-impact detection of the glass lens of the aiming lens are improved.

[0033] Further, the present invention re - determines the clamping position of the glass lens of the machine - aiming lens to be detected according to the deformation - distribution dense area of the glass lens of the machine - aiming lens to be detected, including selecting the symmetric position of the non - deformation - distribution dense area as the clamping position, avoiding further exacerbating the damage of the weak area caused by clamping in subsequent detection, obtaining the displacement amount, displacement direction of the glass lens of the machine - aiming lens to be detected after a single impact - resistance detection, and the deformation - distribution dense area of the glass lens of the machine - aiming lens to be detected. According to the obtained displacement direction, judge the acting direction of the force on the lens during the impact process, and specifically counteract the displacement trend of the lens caused by the impact - resistance. Based on the opposite direction of the acting direction of the force on the lens as the clamping - position line, effectively inhibit the displacement of the lens in subsequent detection. Based on the position with the smallest deformation degree on the clamping - position line as the clamping position, it can minimize the additional deformation of the lens caused by the clamping itself. Through the above - mentioned method, the accuracy of the detection area and the clamping - position positioning in the impact - resistance detection of the glass lens of the machine - aiming lens and the accuracy of the impact - resistance detection of the glass lens of the machine - aiming lens are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 is the working flow chart of the impact - resistance detection method for the glass lens of the machine - aiming lens in the embodiment of the present invention;

[0035] Figure 2 is the working flow chart of the impact - resistance detection method for the glass lens of the machine - aiming lens in the embodiment of the present invention to determine whether to re - determine the clamping position of the glass lens of the machine - aiming lens to be detected;

[0036] Figure 3 is the working flow chart of the impact - resistance detection method for the glass lens of the machine - aiming lens in the embodiment of the present invention to determine the impact - resistance detection center area of the glass lens of the machine - aiming lens to be detected;

[0037] Figure 4 is the working flow chart of the impact - resistance detection method for the glass lens of the machine - aiming lens in the embodiment of the present invention to determine the initial clamping position of the glass lens of the machine - aiming lens to be detected. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0038] In order to make the purpose and advantages of the present invention clearer, the present invention 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 invention and are not used to limit the present invention.

[0039] The preferred embodiments of the present invention 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 principle of the present invention and do not limit the protection scope of the present invention.

[0040] Please refer to Figures 1-4 as shown Figure 1It is the flowchart of the anti-impact detection method for the glass lens of the iron sight lens in the embodiment of the present invention; Figure 2 It is the flowchart of the anti-impact detection method for the glass lens of the iron sight lens in the embodiment of the present invention to determine whether to re-determine the clamping position of the glass lens of the to-be-detected iron sight lens; Figure 3 It is the flowchart of the anti-impact detection method for the glass lens of the iron sight lens in the embodiment of the present invention to determine the anti-impact detection central area of the glass lens of the to-be-detected iron sight lens; Figure 4 It is the flowchart of the anti-impact detection method for the glass lens of the iron sight lens in the embodiment of the present invention to determine the initial clamping position of the glass lens of the to-be-detected iron sight lens.

[0041] The anti-impact detection method for the glass lens of the iron sight lens in the embodiment of the present invention includes:

[0042] Step S1, obtaining the geometric characteristic parameter data, optical characteristic parameter data, and impact detection device parameter data of the glass lens of the to-be-detected iron sight lens;

[0043] Step S2, determining the anti-impact detection central area of the glass lens of the to-be-detected iron sight lens based on the curvature of the glass lens of the to-be-detected iron sight lens and the degree of shape regularity of the glass lens of the to-be-detected iron sight lens;

[0044] Step S3, determining the initial clamping position of the glass lens of the to-be-detected iron sight lens based on the deviation degree between the anti-impact detection central area and the preset anti-impact detection central area and the shape feature tendency value of the edge area of the glass lens of the to-be-detected iron sight lens;

[0045] Step S4, performing repeated impact tests on the clamped glass lens of the to-be-detected iron sight lens, and determining whether to re-determine the clamping position of the glass lens of the to-be-detected iron sight lens based on whether the glass lens of the to-be-detected iron sight lens has displacement after a single impact test and the deformation degree of the glass lens of the to-be-detected iron sight lens;

[0046] Step S5, re-determining the clamping position of the glass lens of the to-be-detected iron sight lens based on the displacement direction of the glass lens of the to-be-detected iron sight lens and the deformation distribution dense area of the glass lens of the to-be-detected iron sight lens.

[0047] In the embodiment of the present invention, the geometric characteristic parameter data of the glass lens of the to-be-detected iron sight lens includes but is not limited to "lens diameter, lens thickness, and radius of curvature", the optical characteristic parameter data includes but is not limited to "refractive index, Abbe number, and transmittance", and the impact detection device parameter data includes but is not limited to "impact energy, impact head diameter, and impact speed".

[0048] Specifically, in step S2, when determining the anti-impact detection central area of the to-be-detected aiming lens glass lens, the anti-impact detection central area of the to-be-detected aiming lens glass lens is determined according to the curvature of the to-be-detected aiming lens glass lens and the degree of shape regularity of the to-be-detected aiming lens glass lens;

[0049] When the curvature of the to-be-detected aiming lens glass lens is less than the preset curvature and the degree of shape regularity of the to-be-detected aiming lens glass lens is greater than the preset shape regularity degree, the lens center position is determined as the anti-impact detection central area;

[0050] When the curvature of the to-be-detected aiming lens glass lens is greater than or equal to the preset curvature or the degree of shape regularity of the to-be-detected aiming lens glass lens is less than or equal to the preset shape regularity degree, the continuous area with the smallest lens curvature is determined as the anti-impact detection central area.

[0051] In the embodiment of the present invention, the lens center position is a circumferential area with a radius centered on the lens center point and accounting for 15%-25% of the total lens area. The preferred value of the above total lens area is 20%. The reason for selecting this preferred value is that when the central area is 20% of the total lens area, it will neither make the detection area too large, resulting in too long detection time and increased cost, nor be too small in area to accurately reflect the anti-impact performance of the lens. The continuous area is determined by the change rate of the lens curvature. For example, a professional curvature measuring instrument is used to measure the curvature at multiple points on the lens surface to determine the point with the smallest curvature. Taking the point with the smallest curvature as the center, a circumferential area with a radius centered on the point with the smallest curvature and accounting for 15%-25% of the total lens area is selected as the continuous area. The preferred value of the above total lens area is 20%. However, the above values are not limited to this, and those skilled in the art can also adjust the values according to actual needs.

[0052] In the embodiment of the present invention, the preset curvature is determined according to the average value of the curvatures of several lenses of the same type. For example, the historical curvatures of two lenses of the same type are 0.04mm -1 and 0.06mm -1 , and the preset curvature is obtained as 0.05mm -1 . However, the above values are not limited to this, and those skilled in the art can also adjust the values according to actual needs.

[0053] In the embodiment of the present invention, the degree of shape regularity of the glass lens of the to-be-detected iron sight lens is determined by the standard deviation of the height of the lens surface. The preset degree of shape regularity is determined according to the average value of the degrees of shape regularity of several lenses of the same type. For example, when measuring the heights at three positions on the lens surface as 5 mm, 6 mm, and 8 mm, the standard deviation of the height of the lens surface is obtained as 1.247 mm, and the degree of shape regularity of the glass lens of the to-be-detected iron sight lens is obtained as 1.247. For another example, the historical values of the degrees of shape regularity of two lenses of the same type are 1.2 and 1.3 respectively, and the preset degree of shape regularity is obtained as 1.25. However, the above values are not limited to this, and those skilled in the art can also adjust the values according to actual needs.

[0054] The present invention determines the anti-impact detection center area of the glass lens of the to-be-detected iron sight lens through the curvature of the glass lens of the to-be-detected iron sight lens and the degree of shape regularity of the glass lens of the to-be-detected iron sight lens. According to the fact that the curvature of the glass lens of the to-be-detected iron sight lens is less than the preset curvature and the degree of shape regularity of the glass lens of the to-be-detected iron sight lens is greater than the preset degree of shape regularity, it indicates that the lens is relatively flat, and at the same time, the deviation of the shape of the lens from the ideal shape is small. The center position of the lens is accurately determined as the anti-impact detection center area. According to the fact that the curvature of the glass lens of the to-be-detected iron sight lens is greater than or equal to the preset curvature or the degree of shape regularity of the glass lens of the to-be-detected iron sight lens is less than or equal to the preset degree of shape regularity, it indicates that the lens is relatively more curved, or the shape regularity of the lens is poor, and there are certain irregularities or deviations on the surface. The continuous area with the smallest curvature of the lens is accurately determined as the anti-impact detection center area. Through the above method, the accuracy of positioning the detection area and the clamping position in the anti-impact detection of the glass lens of the iron sight lens and the accuracy of the anti-impact detection of the glass lens of the iron sight lens are improved.

[0055] Specifically, in step S3, when determining the initial clamping position of the glass lens of the to-be-detected iron sight lens, the initial clamping position of the glass lens of the to-be-detected iron sight lens is determined according to the deviation degree between the anti-impact detection center area and the preset anti-impact detection center area and the shape feature tendency value of the edge area of the glass lens of the to-be-detected iron sight lens;

[0056] When the deviation degree between the anti-impact detection center area and the preset anti-impact detection center area is less than the preset deviation degree and the shape feature tendency value of the edge area of the glass lens of the to-be-detected iron sight lens is less than the preset shape feature tendency value, then several support points are symmetrically selected along the boundary of the area with the anti-impact detection center area as the reference as the initial clamping position;

[0057] When the deviation degree between the anti-impact detection center area and the preset anti-impact detection center area is greater than or equal to the preset deviation degree, or the shape feature tendency value of the edge area of the machine sight lens glass lens to be detected is greater than or equal to the preset shape feature tendency value, then it is determined to select the clamping position with the minimum stress concentration coefficient as the initial clamping position.

[0058] In the embodiment of the present invention, the deviation degree between the anti-impact detection center area and the preset anti-impact detection center area is the deviation value between the center position of the anti-impact detection center area and the center point of the preset anti-impact detection center area. For example, the position coordinates of the center point of the anti-impact detection center area are (3, 4), and the position coordinates of the center point of the preset anti-impact detection center area are (1, 1), and the obtained deviation degree is 3.61. The preset deviation degree is the average value of the deviation degrees between the anti-impact detection center areas of several lenses of the same type and the preset anti-impact detection center area. However, the above values are not limited to this, and those skilled in the art can also adjust the values according to actual needs.

[0059] In the embodiment of the present invention, the shape feature tendency value is determined by the ratio of the standard deviation to the mean value of the edge thickness. The preset shape feature tendency value is determined according to the average value of the shape feature tendency values of the edge areas of several lenses of the same type. For example, the thicknesses of five points equidistant from the edge of the lens are measured to be 3mm, 5mm, 6mm, 4mm, and 3mm respectively, and the calculated mean value of the thickness is 1.36mm, and the obtained shape feature tendency value is 0.32. However, the above values are not limited to this, and those skilled in the art can also adjust the values according to actual needs.

[0060] In the embodiment of the present invention, the stress concentration coefficient is determined according to the ratio of the maximum local stress to the nominal stress. For example, the maximum local stress is 150MPa and the nominal stress is 50MPa, and the obtained stress concentration coefficient is 3. However, the above values are not limited to this, and those skilled in the art can also adjust the values according to actual needs.

[0061] The present invention determines the initial clamping position of the glass lens of the aiming sight to be detected based on the deviation degree between the anti-impact detection central region and the preset anti-impact detection central region, and the shape feature tendency value of the edge region of the glass lens of the aiming sight to be detected. According to the fact that the deviation degree between the anti-impact detection central region and the preset anti-impact detection central region is less than the preset deviation degree and the shape feature tendency value of the edge region of the glass lens of the aiming sight to be detected is less than the preset shape feature tendency value, it indicates that the performance distribution of the lens is relatively stable within the key detection region of the design. Taking the anti-impact detection central region as a reference, several support points are symmetrically selected along the boundary of this region as the initial clamping position. According to the fact that the deviation degree between the anti-impact detection central region and the preset anti-impact detection central region is greater than or equal to the preset deviation degree or the shape feature tendency value of the edge region of the glass lens of the aiming sight to be detected is greater than or equal to the preset shape feature tendency value, it indicates that there is an obvious deviation between the actual anti-impact detection central region of the lens and the ideal region, and there may be local performance weak points. The clamping position with the minimum stress concentration coefficient is accurately determined and selected as the initial clamping position. Through the above method, the accuracy of the detection region and the clamping position positioning in the anti-impact detection of the glass lens of the aiming sight and the accuracy of the anti-impact detection of the glass lens of the aiming sight are improved.

[0062] Specifically, in step S4, when determining whether to re-determine the clamping position of the glass lens of the aiming sight to be detected, it is determined whether to re-determine the clamping position of the glass lens of the aiming sight to be detected according to whether the glass lens of the aiming sight to be detected has a displacement after a single impact test and the deformation degree of the glass lens of the aiming sight to be detected;

[0063] When the glass lens of the aiming sight to be detected has a displacement after a single impact test or the deformation degree of the glass lens of the aiming sight to be detected is greater than the preset deformation degree, it is determined to re-determine the clamping position of the glass lens of the aiming sight to be detected;

[0064] When the glass lens of the aiming sight to be detected has no displacement after a single impact test and the deformation degree of the glass lens of the aiming sight to be detected is less than or equal to the preset deformation degree, it is determined that there is no need to re-determine the clamping position of the glass lens of the aiming sight to be detected.

[0065] In the embodiment of the present invention, the deformation degree is determined by accurately measuring the planar area of the lens before and after the impact test and calculating the difference in the planar area before and after the impact. For example, the planar area of the lens before the impact test is 5 cm 2 , and the planar area of the lens after the impact test is 6 cm 2 , and the obtained deformation degree is 1 cm 2 , but the above values are not limited to this, and those skilled in the art can also adjust the values according to actual needs.

[0066] In the embodiment of the present invention, the preset deformation degree is determined according to the maximum allowable strain value of the lens to be detected. The range of the maximum allowable strain value is set to 0.001 m / m - 0.003 m / m, and the preferred value is 0.002 m / m. The reason for selecting this preferred value is that if the maximum allowable strain value is set too low, it may impose too high requirements on the manufacturing process, increasing production costs and production difficulties; while if it is set too high, it may lead to unstable product quality and increase the use risk. The preset deformation degree obtained is 0.002 m / m, but the above values are not limited to this, and those skilled in the art can also adjust the values according to actual needs.

[0067] The present invention determines whether to re-determine the clamping position of the lens to be detected for the machine aiming lens glass lens by whether the lens to be detected for the machine aiming lens glass lens has a displacement and the deformation degree of the lens to be detected for the machine aiming lens glass lens after a single impact test. According to whether the lens to be detected for the machine aiming lens glass lens has a displacement or the deformation degree of the lens to be detected for the machine aiming lens glass lens after a single impact test is greater than the preset deformation degree, stress concentration phenomena will occur in some parts. The secondary clamping position should avoid being selected in the stress concentration area because these areas have already withstood greater stress and are more likely to crack when subjected to impact again. It should be selected in the area where the stress distribution is relatively uniform for secondary clamping to disperse the impact force and reduce the risk of the lens breaking in subsequent tests, thereby improving the accuracy of the impact resistance detection of the lens under different stress conditions. According to whether the lens to be detected for the machine aiming lens glass lens has no displacement and the deformation degree of the lens to be detected for the machine aiming lens glass lens after a single impact test is less than or equal to the preset deformation degree, it indicates that factors such as the clamping force and the clamping position can effectively limit the displacement of the lens, and it is accurately determined that there is no need to re-determine the clamping position of the lens to be detected for the machine aiming lens glass lens. Through the above method, the accuracy of the detection area and the clamping position positioning in the impact resistance detection of the machine aiming lens glass lens and the accuracy of the impact resistance detection of the machine aiming lens glass lens are improved.

[0068] Specifically, in step S5, re-determining the clamping position of the lens to be detected for the machine aiming lens glass lens based on the dense deformation distribution area of the lens to be detected for the machine aiming lens glass lens includes selecting the symmetric position of the non-dense deformation distribution area as the clamping position. For example, for a circular optical glass machine aiming lens glass lens with a diameter of 50 mm, after a single impact resistance test, using a high-precision optical measurement device to determine that the upper left corner is the dense deformation distribution area, three points are selected as the new clamping positions in the lower right area of the lens, which are point A 5 mm away from the edge, and point B and point C that are 5 mm away from the edge and are spaced 30° clockwise and counterclockwise from point A, respectively. However, the above values are not limited to this, and those skilled in the art can also adjust the values according to actual needs.

[0069] Specifically, in step S5, the step of determining the clamping position of the glass lens of the to-be-detected iron sight lens based on the displacement direction of the glass lens of the to-be-detected iron sight lens includes:

[0070] Step S5501, obtain the displacement amount, displacement direction of the glass lens of the to-be-detected iron sight lens after a single impact test, and the deformation distribution dense area of the glass lens of the to-be-detected iron sight lens;

[0071] Step S5502, according to the obtained displacement direction, judge the acting direction of the force on the lens during the impact process;

[0072] Step S5503, use the reverse direction of the acting direction of the force on the lens as the clamping position line;

[0073] Step S5504, use the position with the smallest deformation degree on the clamping position line as the clamping position.

[0074] The present invention can use high-precision displacement sensors and strain gauges, which are respectively installed at the edge and key positions on the surface of the lens, to record the displacement amount and displacement direction of the lens. Assuming the displacement amount is 2 mm and the displacement direction is the positive X direction, the strain gauge records the strain distribution on the surface of the lens, generates a deformation distribution map through data processing software, and determines that the deformation distribution dense area is mainly concentrated in the upper right corner of the lens; according to the data of the displacement sensor, the lens moves 2 mm along the positive X direction during the impact process. From this, it can be judged that the lens is mainly subjected to a force along the positive X direction during the impact process; since the force on the lens is along the positive X direction, the clamping position should be selected in the reverse direction of the force, that is, the negative X direction, and this line is called the clamping position line; combined with the deformation distribution map, it is found that the deformation distribution dense area is mainly concentrated in the upper right corner of the lens, which means that the upper right corner of the lens bears a large stress during the impact process; on the clamping position line, find the position with the smallest deformation degree. By analyzing the deformation distribution map, it is found that the deformation degree of the lower left corner of the lens is the smallest, and the clamping point of the clamping device is adjusted to the area with the smallest deformation in the lower left corner of the lens.

[0075] The present invention determines the clamping position of the glass lens of the machine sight lens to be detected again according to the dense deformation distribution area of the glass lens of the machine sight lens to be detected, including selecting the symmetric position of the non-dense deformation distribution area as the clamping position, avoiding further aggravation of the damage to the weak area caused by clamping in subsequent detection, obtaining the displacement amount, displacement direction of the glass lens of the machine sight lens to be detected after a single impact resistance test, and the dense deformation distribution area of the glass lens of the machine sight lens to be detected, judging the acting direction of the force received by the lens during the impact process according to the obtained displacement direction, and aiming at the displacement trend of the lens caused by the impact resistance, taking the opposite direction of the acting direction of the force received by the lens as the clamping position line, effectively suppressing the displacement of the lens in subsequent detection, and taking the position with the smallest deformation degree on the clamping position line as the clamping position, which can minimize the additional deformation of the lens caused by the clamping itself. Through the above method, the accuracy of the detection area and the clamping position positioning in the impact resistance test of the glass lens of the machine sight lens and the accuracy of the impact resistance test of the glass lens of the machine sight lens are improved.

[0076] So far, the technical solution of the present invention has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of the present invention.

Claims

1. A method for detecting the impact resistance of a glass lens of a mechanical aiming lens, characterized in that, Including: Step S1: Obtain the geometric characteristic parameter data, optical characteristic parameter data, and impact detection equipment parameter data of the to-be-detected peep sight lens glass lens; Step S2: Determine the impact-resistant detection central area of the to-be-detected peep sight lens glass lens based on the curvature of the to-be-detected peep sight lens glass lens and the degree of shape regularity of the to-be-detected peep sight lens glass lens; Step S3: Determine the initial clamping position of the to-be-detected peep sight lens glass lens based on the deviation degree between the impact-resistant detection central area and the preset impact-resistant detection central area and the shape feature tendency value of the edge area of the to-be-detected peep sight lens glass lens; Step S4: Conduct repeated impact tests on the clamped to-be-detected peep sight lens glass lens, and determine whether to re-determine the clamping position of the to-be-detected peep sight lens glass lens based on whether the to-be-detected peep sight lens glass lens has displacement after a single impact test and the deformation degree of the to-be-detected peep sight lens glass lens; Step S5: Re-determine the clamping position of the to-be-detected peep sight lens glass lens based on the displacement direction of the to-be-detected peep sight lens glass lens and the deformation distribution dense area of the to-be-detected peep sight lens glass lens.

2. The anti-impact detection method for the aiming lens glass lens according to claim 1, wherein In the step S2, determining the impact-resistant detection central area of the to-be-detected peep sight lens glass lens based on the curvature of the to-be-detected peep sight lens glass lens and the degree of shape regularity of the to-be-detected peep sight lens glass lens includes: If the curvature of the to-be-detected peep sight lens glass lens is less than the preset curvature and the degree of shape regularity of the to-be-detected peep sight lens glass lens is greater than the preset shape regularity degree, determine the lens center position as the impact-resistant detection central area; If the curvature of the to-be-detected peep sight lens glass lens is greater than or equal to the preset curvature or the degree of shape regularity of the to-be-detected peep sight lens glass lens is less than or equal to the preset shape regularity degree, determine the continuous area with the minimum lens curvature as the impact-resistant detection central area.

3. The impact resistance detection method for the iron sight lens glass lens according to claim 2, characterized in that, The degree of shape regularity of the to-be-detected peep sight lens glass lens is determined by the standard deviation of the lens surface height. The preset curvature is determined according to the average value of the curvatures of several lenses of the same type. The preset shape regularity degree is determined according to the average value of the shape regularity degrees of several lenses of the same type.

4. The impact resistance detection method of the iron sight lens glass lens according to claim 3, wherein, In the step S3, determining the initial clamping position of the to-be-detected peep sight lens glass lens based on the deviation degree between the impact-resistant detection central area and the preset impact-resistant detection central area and the shape feature tendency value of the edge area of the to-be-detected peep sight lens glass lens includes: If the deviation degree between the impact-resistant detection central area and the preset impact-resistant detection central area is less than the preset deviation degree and the shape feature tendency value of the edge area of the to-be-detected peep sight lens glass lens is less than the preset shape feature tendency value, determine to symmetrically select several support points along the boundary of the area with the impact-resistant detection central area as the benchmark as the initial clamping position; If the deviation degree between the anti-impact detection center area and the preset anti-impact detection center area is greater than or equal to the preset deviation degree, or the shape feature tendency value of the edge area of the glass lens of the to-be-detected machine aiming lens is greater than or equal to the preset shape feature tendency value, determine to select the clamping position with the minimum stress concentration coefficient as the initial clamping position.

5. The impact resistance detection method of the iron sight lens glass lens according to claim 4, characterized in that, The deviation degree between the anti-impact detection center area and the preset anti-impact detection center area is determined according to the deviation value between the center point of the anti-impact detection center area and the center point of the preset anti-impact detection center area. The preset deviation degree is determined according to the average value of the deviation degrees between the anti-impact detection center areas and the preset anti-impact detection center areas of several lenses of the same type. The shape feature tendency value is determined by the ratio of the standard deviation of the edge thickness to the mean value. The preset shape feature tendency value is determined according to the average value of the shape feature tendency values of the edge areas of several lenses of the same type.

6. The impact resistance detection method of the iron sight lens glass lens according to claim 5, characterized in that, The stress concentration coefficient is determined according to the ratio of the maximum local stress to the nominal stress.

7. The anti-impact detection method for the aiming lens glass lens according to claim 6, characterized in that, In step S4, determining whether to re-determine the clamping position of the glass lens of the to-be-detected machine aiming lens based on whether the glass lens of the to-be-detected machine aiming lens has displacement and the deformation degree of the glass lens of the to-be-detected machine aiming lens after a single impact test includes: If the glass lens of the to-be-detected machine aiming lens has displacement after a single impact test or the deformation degree of the glass lens of the to-be-detected machine aiming lens is greater than the preset deformation degree, determine to re-determine the clamping position of the glass lens of the to-be-detected machine aiming lens.

8. The impact resistance detection method of the iron sight lens glass lens according to claim 7, characterized in that, The deformation degree is determined by accurately measuring the planar area of the lens before and after the impact test and calculating the area difference. The preset deformation degree is determined according to the maximum allowable strain value of the to-be-detected lens.

9. The anti-impact detection method for the aiming lens glass lens according to claim 8, characterized in that, In step S5, re-determining the clamping position of the glass lens of the to-be-detected machine aiming lens based on the deformation distribution dense area of the glass lens of the to-be-detected machine aiming lens includes selecting the symmetric position of the non-deformation distribution dense area as the clamping position.

10. The impact resistance detection method for the iron sight lens glass lens according to claim 9, characterized in that, In step S5, determining the clamping position of the glass lens of the to-be-detected machine aiming lens based on the displacement direction of the glass lens of the to-be-detected machine aiming lens includes: Obtain the displacement amount, displacement direction of the glass lens of the to-be-detected machine aiming lens after a single anti-impact test, and the deformation distribution dense area of the glass lens of the to-be-detected machine aiming lens; According to the obtained displacement direction, judge the acting direction of the force on the lens during the impact; Based on the opposite direction of the acting direction of the force on the lens as the clamping position line; Based on the position with the minimum deformation degree on the clamping position line as the clamping position.

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