A rapid and non-destructive visual health assessment method for unearthed bamboo and wooden artifacts

Abstract

The present invention discloses a rapid non-destructive visual health assessment method for bamboo and wooden artifacts at an unearthed site, which belongs to the field of cultural relic detection methods, including laser measurement to calculate the integrity of cultural relics; testing the hardness of bamboo and wooden artifacts; calculating the absolute moisture content by testing the relative moisture content of bamboo and wooden artifacts; monitoring the chromaticity change rate of bamboo and wooden artifacts; real-time testing of environmental soil parameters; and drawing a visual health assessment diagram of bamboo and wooden artifacts according to the above test results to intuitively present the health level of the cultural relics. The health assessment method of bamboo and wooden artifacts of the present invention can realize non-destructive, rapid and visual health assessment of bamboo and wooden artifacts at an unearthed site, and complete the protection detection of bamboo and wooden artifacts at an unearthed site to the greatest extent.

Description

Technical Field

[0001] The invention belongs to the field of cultural relic detection methods, and in particular relates to a rapid non-destructive visual health assessment method for bamboo and wooden artifacts unearthed at a site. Background Art

[0002] Cultural relics are important materials for telling human history and an important way to trace the origin of human civilization. Therefore, the health status and proper preservation of cultural relics are of great significance. Among the many cultural relics, bamboo and wooden artifacts, as an important part of organic cultural relics, are more susceptible to environmental influences and their preservation status is usually not optimistic. Among the many factors that cause the deterioration of bamboo and wooden artifacts, the excavation site is usually affected by sudden changes in the environment, which usually causes irreversible damage to bamboo and wooden artifacts. Therefore, the health status of bamboo and wooden artifacts at the excavation site deserves more attention.

[0003] Traditional health assessment of bamboo and wooden artifacts usually requires the collection of wooden artifact samples for a large number of laboratory tests such as tree species detection, microstructure, and cellulose degradation degree. This will undoubtedly bring three problems: first, the sampling of artifacts causes damage to the artifacts themselves; second, laboratory testing takes a long time, increasing the degree of exposure and damage to the artifacts at the unearthed site; third, the test results are usually more complicated, and it is difficult to intuitively give a final conclusion on the health status of the artifacts. Summary of the invention

[0004] In order to overcome the shortcomings of the above-mentioned prior art, the purpose of the present invention is to provide a rapid, non-destructive, visual health assessment method for unearthed bamboo and wooden artifacts, so as to solve the problems in the prior art of damage to the artifacts caused by sampling, time-consuming laboratory testing, and complex and non-intuitive test results.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] The invention discloses a rapid non-destructive visual health assessment method for unearthed bamboo and wooden artifacts, comprising the following steps:

[0007] Step 1: Calculate the completeness of the cultural relics;

[0008] Step 2: Obtain the hardness and hardness change rate of bamboo and wooden artifacts;

[0009] Step 3: Test the relative moisture content of bamboo and wooden artifacts, and calculate the absolute moisture content and the absolute moisture content change rate;

[0010] Step 4: Monitor the rate of change of color of bamboo and wooden artifacts;

[0011] Step 5: Real-time testing of environmental soil salinity;

[0012] Step 6: Based on the measurement results of steps 1 to 5, draw a visualization diagram of the health assessment of bamboo and wooden artifacts.

[0013] Preferably, in step one, laser ranging is used to measure the size of the bamboo and wooden artifact body and defective parts to calculate the integrity of the bamboo and wooden artifact.

[0014] Preferably, in step 2, points are evenly taken on the surface of the bamboo and wooden artifacts, and the hardness of the bamboo and wooden artifacts is measured with a wood hardness meter; and the average hardness is calculated as the hardness value.

[0015] Preferably, in step three, points are uniformly taken on the surface of the bamboo and wooden artifacts, and the relative moisture content of the bamboo and wooden artifacts is measured using a wood moisture meter; and the average relative moisture content is calculated as the relative moisture content.

[0016] Preferably, in step 3, the equation for calculating the absolute moisture content of bamboo and wooden artifacts is:

[0017] z=0.58x-3.7y+374

[0018] Among them, z is the absolute moisture content; x is the relative moisture content; y is the hardness.

[0019] Preferably, in step 4, the chromaticity of the bamboo and wooden artifacts is tested with a colorimeter at intervals of 10 minutes, recorded several times, and the chromaticity change rate is calculated.

[0020] Preferably, in step five, a multifunctional soil temperature and humidity detector is used to perform real-time detection of salinity.

[0021] Preferably, the higher the integrity of the bamboo and wooden artifacts, the smaller the hardness change rate, absolute moisture content change rate, chromaticity change rate and salinity test values, and the higher the health index of the bamboo and wooden artifacts.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The invention discloses a method for rapid non-destructive visual health assessment of bamboo and wooden artifacts at unearthed sites. The method adopts non-destructive detection methods and does not require the extraction of some artifact samples for destructive testing, thereby protecting the integrity of bamboo and wooden artifacts to the greatest extent. Through simple and rapid size measurement, relative moisture content test, hardness test, chromaticity test and soil parameter test, the single measurement time can be shortened to 10 minutes, avoiding time-consuming laboratory tests and reducing the risk of accelerated deterioration of unearthed artifacts due to long-term exposure. Finally, the measurement results are plotted into a visual health assessment diagram of bamboo and wooden artifacts according to the health index of each parameter, which provides the possibility for rapid non-destructive visual detection of bamboo and wooden artifacts at unearthed sites.

[0024] Furthermore, evenly taking points on the surface of bamboo and wooden artifacts to measure the hardness and relative moisture content of the bamboo and wooden artifacts is beneficial to ensuring the integrity of the bamboo and wooden artifacts. At the same time, evenly taking points and finally taking the average value reduces the detection error and improves the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a flow chart of the present invention;

[0026] Figure 2 This is the dependent relationship diagram of the absolute moisture content, relative measured moisture content and hardness of bamboo and wooden artifacts;

[0027] Figure 3 Visualized health assessment curve for unearthed wooden artifacts. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0029] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0030] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0031] See also Figure 1 , which is a flow chart of a method for rapid non-destructive visual health assessment of unearthed bamboo and wooden artifacts disclosed in the present invention; as can be seen from the figure, it includes the following steps:

[0032] Step 1: Calculate the completeness of the cultural relics;

[0033] Step 2: Test the hardness and hardness change rate of bamboo and wooden artifacts;

[0034] Step 3: Real-time test of the relative moisture content of bamboo and wooden artifacts, and calculation of the absolute moisture content and the absolute moisture content change rate;

[0035] Step 4: Use a colorimeter to monitor the color change rate of bamboo and wooden artifacts;

[0036] Step 5: The multifunctional soil meter tests the environmental soil salinity in real time;

[0037] Step 6: Based on the measurement results of steps 1 to 5, draw a visualization diagram of the health evaluation of bamboo and wooden artifacts to intuitively present the health status of the artifacts.

[0038] Furthermore, in step 1, laser ranging is used to measure the size of the cultural relic body and defective parts, and the integrity of the cultural relic is calculated by calculating the existing volume / (defective volume+existing volume). The total score of this indicator is 10, and the integrity × 100 is the score of this item. The higher the integrity, the higher the health index of this item;

[0039] Furthermore, in step 2, 10 points are evenly taken on the surface of the cultural relic, and the hardness of the bamboo and wooden cultural relic is measured by a wood hardness tester to calculate the average hardness; the test is performed once every 10 minutes, and the test is performed 6 times in succession, and the 6 times of absolute moisture content are plotted against time, and the absolute value of the slope is the rate of change. The total score of this indicator is 10, and the score decreases by 1 for every 0.01 increase in the slope, and the minimum score is not less than 0. The smaller the hardness change rate, the higher the health index of this item;

[0040] Further, in step three, 10 points are evenly taken on the surface of the cultural relic, and the relative moisture content of the bamboo and wooden cultural relic is measured with a three-tooth wood moisture meter to calculate the average relative moisture content; the average hardness in step two is used as the hardness value; the average relative moisture content is calculated by the formula z=0.58x-3.7y+374, wherein z is the absolute moisture content; x is the relative moisture content; y is the absolute moisture content calculated by the hardness; the test is performed once every 10 minutes, and 6 tests are performed continuously, and the 6 absolute moisture contents are plotted against time, and the absolute value of the slope is the rate of change. The total score of this indicator is 10, and the score is subtracted by 1 for every 0.05 increase in the rate of change. The minimum score is not less than 0, and the smaller the absolute moisture content change rate, the higher the health index of this item;

[0041] Furthermore, in step 4, the colorimeter of bamboo and wooden artifacts is used to test the colorimetry of the artifacts at intervals of 10 minutes for 6 consecutive tests, and the 6 colorimetric values ​​are plotted against time. The absolute value of the slope is the rate of change. The total score of this indicator is 10. For every 0.05 increase in the rate of change, the score is subtracted by 1. The minimum score is not less than 0. The smaller the rate of change of the colorimetry, the higher the health index of this item.

[0042] Furthermore, in step five, a multifunctional soil temperature and humidity detector is used to test salinity. The total score of this indicator is 10. For every 100 increase in salinity, the score decreases by 1. The minimum score is not less than 0. The smaller the test value, the higher the health index.

[0043] Furthermore, in step six, based on the measurement results of steps one to five, a visualization diagram of the health evaluation of bamboo and wooden artifacts is drawn to intuitively present the health level of the artifacts.

[0044] See also Figure 2 , which is a dependent relationship diagram of the absolute moisture content, relative measured moisture content and hardness of bamboo and wooden artifacts. It can be seen from the figure that the absolute moisture content is determined by both the relative measured moisture content and the hardness. Its value is positively correlated with the relative measured moisture content and negatively correlated with the hardness. It increases with the increase of the relative measured moisture content and decreases with the increase of the hardness.

[0045] Example:

[0046] The present invention is described by taking three kinds of wooden cultural relics, namely, board #5, board #22 and board #13, which were unearthed from the site F63 of Jijiaocheng in Hunan Province.

[0047] Step 1: Use Leica X3 handheld laser rangefinder to measure the size of the 5#, 22# and 13# plates and the size of the defective parts. Calculate the integrity of the cultural relics by calculating the existing volume / (defect volume + existing volume). The total score of this indicator is 10, and the integrity × 100 is the score of this item. The results are shown in Table 1.

[0048] Table 1

[0049] 5# board 22# board 13# board Defect volume 0 0.02 0.074 Existing volume 0.302 0.08 0.096 Completeness 100％ 75％ 23％ Score 10 7.5 2.3

[0050] Step 2: Take 10 points evenly on the surface of 5# board, 22# board and 13# board respectively, use wood hardness tester to measure the hardness of bamboo and wooden artifacts, and calculate the average hardness; test once every 10 minutes, test 6 times in a row, and plot the 6 hardness values ​​against time. The absolute value of the slope is the rate of change. The total score of this index is 10. For every 0.01 increase in the slope, the score decreases by 1, and the minimum score is not less than 0. The results are shown in Table 2;

[0051] Table 2

[0052] hardness 5# board 22# board 13# board 10 minutes 54 89 43 20 minutes 57 90 41 30 minutes 65 90 46 40 minutes 69 90 48 50 minutes 70 91 54 60 minutes 72 90 64 Rate of change 0.38 / min 0.02 / min 0.42 / min Score 7 8 6

[0053] Step 3: Take 10 points evenly on the surface of 5# board, 22# board and 13# board, and measure the relative moisture content of bamboo and wooden artifacts at each point with MD288 three-tooth microwave wood moisture meter, and calculate the overall average relative moisture content; take the average hardness in step 2 as the hardness value; calculate the absolute moisture content with the formula z=0.58x-3.7y+374, where z is the absolute moisture content; x is the relative moisture content; y is the hardness; test once every 10 minutes, test 6 times in a row, and plot the 6 absolute moisture contents against time. The absolute value of the slope is the rate of change. The total score of this indicator is 10. For every 0.05 increase in the rate of change, the score is subtracted by 1, and the minimum score is not less than 0. The results are shown in Tables 3 and 4.

[0054] Table 3

[0055] Measuring moisture content 5# board 22# board 13# board 10 minutes 29.4 15.3 30 20 minutes 28.3 14 30 30 minutes 25.7 13.8 24.5 40 minutes 25.7 14 22.7 50 minutes 25.2 13.5 21.8 60 minutes 24.8 14.52 20.2

[0056] Table 4

[0057] Absolute moisture content 5# board 22# board 13# board 10 minutes 214.252 53.574 232.3 20 minutes 202.514 49.12 239.7 30 minutes 171.406 49.004 218.01 40 minutes 156.606 49.12 209.566 50 minutes 152.616 45.13 186.844 60 minutes 144.984 49.4216 148.916 Rate of change 1.46 / min 0.09 / min 1.67 / min Score 8 9 7

[0058] Step 4: Use Metavue colorimeter to test the chromaticity of 5# board, 22# board and 13# board at intervals of 10 minutes, and test 6 times in succession. Plot the chromaticity values ​​of the 6 times against time. The absolute value of the slope is the rate of change. The total score of this indicator is 10. For every 0.05 increase in the rate of change, the score is subtracted by 1. The minimum score is not less than 0. The results are shown in Table 5.

[0059] Table 5

[0060] Chroma 5# board 22# board 13# board 10 minutes 25.7 22.9 0.09 20 minutes 25.69 23.39 0.12 30 minutes 25.7 24.48 0.14 40 minutes 25.69 25.16 0.17 50 minutes 25.7 24.58 0.11 60 minutes 25.7 25.02 0.1 Rate of change 0 / min 0.04 / min 0 / min Score 10 10 10

[0061] Step 5: Use Shunkeda multifunctional soil temperature and humidity detector to measure the salinity of the surrounding environment of 5# plate, 22# plate and 13# plate. The total score of this indicator is 10. For every increase of 100 in salinity, the score decreases by 1. The minimum score is not less than 0. The results are shown in Table 6:

[0062] Table 6

[0063] Environmental parameters 5# board 22# board 13# board salinity 270 172 383 Score 8 9 7

[0064] Step 6: Based on the measurement results of steps 1 to 5, draw a visualization diagram of the health assessment of bamboo and wooden artifacts. Figure 3 , intuitively presenting the health of the cultural relics. It can be seen that the health of the 5#, 22# and 13# boards are all in good condition, among which the 22# board is the best and the 13# is slightly worse. The three wooden cultural relics all show large changes in moisture content and the resulting changes in hardness. Attention should be paid to the moisture retention of the wood board in the later extraction.

[0065] In summary, the present invention discloses a rapid non-destructive visual health assessment method for bamboo and wooden artifacts at the unearthed site, including laser measurement to calculate the integrity of the artifacts; testing the hardness of the bamboo and wooden artifacts; calculating the absolute moisture content by testing the relative moisture content of the bamboo and wooden artifacts; monitoring the chromaticity change rate of the bamboo and wooden artifacts; real-time testing of environmental soil parameters; and drawing a visual health assessment diagram of the bamboo and wooden artifacts according to the above test results to intuitively present the health of the artifacts. The health assessment method of bamboo and wooden artifacts described in the present invention can realize non-destructive, rapid, and visual health assessment of bamboo and wooden artifacts at the unearthed site, and complete the protection and detection of bamboo and wooden artifacts at the unearthed site to the greatest extent.

[0066] The above contents are only for explaining the technical idea of ​​the present invention and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the present invention shall fall within the protection scope of the claims of the present invention.

Claims

1. A rapid non-destructive visual health assessment method for unearthed bamboo and wooden artifacts, characterized in that: The following steps are involved: Step 1: Use laser ranging to measure the size of the bamboo and wooden artifacts and the defective parts, and calculate the integrity of the bamboo and wooden artifacts; Step 2: Obtain the hardness and hardness change rate of the bamboo and wooden artifacts: uniformly take points on the surface of the bamboo and wooden artifacts, and measure the hardness of the bamboo and wooden artifacts with a wood hardness meter; calculate the average hardness as the hardness value; Step 3: Take points evenly on the surface of the bamboo and wooden artifacts, measure the relative moisture content of the bamboo and wooden artifacts with a wood moisture meter, and calculate the absolute moisture content and the absolute moisture content change rate; The equation for calculating the absolute moisture content of bamboo and wooden artifacts is: in, is the absolute moisture content; is the relative moisture content; is hardness; Step 4: Monitor the rate of change of color of bamboo and wooden artifacts; Step 5: Real-time testing of environmental soil salinity; Step 6: Based on the measurement results of steps 1 to 5, draw a visualization diagram of the health assessment of bamboo and wooden artifacts.

2. According to claim 1, a rapid non-destructive visual health assessment method for unearthed bamboo and wooden artifacts is characterized in that: In step 4, the colorimeter is used to test the colorimetry of the bamboo and wooden artifacts at intervals of 10 minutes, and the test is recorded several times to calculate the rate of change of colorimetry.

3. According to claim 1, a rapid non-destructive visual health assessment method for unearthed bamboo and wooden artifacts is characterized in that: In step five, a multifunctional soil temperature and humidity detector is used to perform real-time detection of salinity.

4. The method for rapid non-destructive visual health assessment of unearthed bamboo and wooden artifacts according to claim 1, characterized in that: The higher the integrity of bamboo and wooden cultural relics, the smaller the hardness change rate, absolute moisture content change rate, color change rate and salinity test values, and the higher the health index of bamboo and wooden cultural relics.

Images