CN113092303A - Nondestructive testing method for water content of ancient building wood member - Google Patents
Nondestructive testing method for water content of ancient building wood member Download PDFInfo
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- CN113092303A CN113092303A CN202110243308.9A CN202110243308A CN113092303A CN 113092303 A CN113092303 A CN 113092303A CN 202110243308 A CN202110243308 A CN 202110243308A CN 113092303 A CN113092303 A CN 113092303A
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- 239000002023 wood Substances 0.000 title claims abstract description 129
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 94
- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000009659 non-destructive testing Methods 0.000 title claims abstract description 22
- 238000001035 drying Methods 0.000 claims abstract description 28
- 238000005303 weighing Methods 0.000 claims abstract description 18
- 239000002344 surface layer Substances 0.000 claims abstract description 13
- 239000010410 layer Substances 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims description 3
- 238000004321 preservation Methods 0.000 claims description 2
- 238000012935 Averaging Methods 0.000 claims 1
- 238000001514 detection method Methods 0.000 abstract description 22
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 8
- 235000011613 Pinus brutia Nutrition 0.000 description 8
- 241000018646 Pinus brutia Species 0.000 description 8
- 238000012360 testing method Methods 0.000 description 7
- 238000005070 sampling Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 241000218642 Abies Species 0.000 description 1
- 230000002421 anti-septic effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007619 statistical method Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
- G01N5/04—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by removing a component, e.g. by evaporation, and weighing the remainder
- G01N5/045—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by removing a component, e.g. by evaporation, and weighing the remainder for determining moisture content
Abstract
The invention discloses a nondestructive testing method for water content of an ancient building wood member. The nondestructive testing method comprises the following steps: A. providing a wood sample; B. detecting the water content of the wood sample by using a nondestructive moisture tester, and recording as a first water content; C. weighing the weight of the wood sample, drying the wood sample to constant weight, weighing the dried weight of the wood sample, obtaining the average water content from the surface layer to the inner layer of the wood sample according to the weight difference before and after drying, and marking as a second water content; D. repeating the steps A to C for multiple times to obtain multiple groups of first water content and corresponding second water content data, and accordingly obtaining the corresponding relation between the second water content and the first water content; E. and detecting the water content of the surface layer of the historic building wood member by using a nondestructive moisture tester, and obtaining the average water content of the historic building wood member according to the corresponding relation. The invention can carry out nondestructive detection on the average water content of the wooden members of the ancient buildings under the condition of not damaging the wooden members, and has better detection accuracy.
Description
Technical Field
The invention belongs to the field of detection of ancient building wood members, and relates to a nondestructive detection method for water content of an ancient building wood member.
Background
The historic building has historical humanistic value and irreplaceability, but the historic building can be damaged and destroyed to different degrees due to the long-term construction. The protection and repair work must depend on detailed and complete detection data, but due to the particularity of the ancient architecture and a large number of colored drawings on a plurality of components, the ancient architecture cannot be damaged during detection. For wood members of ancient buildings, the water content is one of important test parameters, and technical support is provided for identifying the reliability of wood structures.
The determination requirements of the moisture content in the existing method for determining the moisture content of wood GB/T1931-2009 are as follows: 2-3 samples are cut from the sample, and the size of each sample is 20mm multiplied by 20mm, so that the damage of wooden members of the historic building can be caused. And the portable wood moisture tester on the market at present requires: during detection, 2-4 steel needles of the measurer are inserted into wood to the depth of about 6-11 mm, and the steel needles are only used in the middle link of wood processing and cannot be used for detecting finished components.
Although some nondestructive moisture measuring instruments are available at present, the nondestructive moisture measuring instruments are mainly applied to moisture detection of paper, concrete and the like, and if the nondestructive moisture measuring instruments are applied to wood members of ancient buildings, the moisture content of the inner layer of the wood member cannot be detected without damaging the wood member, the moisture content of the whole wood member cannot be accurately reflected, and the nondestructive moisture measuring instruments cannot be used for structure judgment.
Disclosure of Invention
In view of the above technical problems, an object of the present invention is to provide a method for non-destructive testing of moisture content of timber components of ancient buildings, which can perform non-destructive testing on average moisture content of timber components of ancient buildings without damaging timber components, and has good testing accuracy.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a nondestructive testing method for the moisture content of an ancient building wood member comprises the following steps:
A. providing a wood sample, wherein the wood sample and wood used by the ancient building wood member to be detected belong to the same kind;
B. detecting the water content of the wood sample by using a nondestructive moisture tester, and recording as a first water content;
C. weighing the weight of the wood sample, drying the wood sample to constant weight, weighing the dried weight of the wood sample, obtaining the average water content from the surface layer to the inner layer of the wood sample according to the weight difference before and after drying, and recording as a second water content;
D. repeating the steps A to C for multiple times to obtain multiple groups of first water content and corresponding second water content data, and accordingly obtaining the corresponding relation between the second water content of the wood and the first water content;
E. and detecting the water content of the surface layer of the historic building wood member by using the nondestructive moisture tester, and obtaining the average water content of the historic building wood member according to the corresponding relation.
According to a preferred and specific aspect of the present invention, the wood sample provided in step a is fir, and the correspondence between the second moisture content and the first moisture content of the fir obtained in step D is shown as follows:
y＝0.1561x2-3.9539x+36.254
in the above formula, y represents the second water content of the fir wood, and x represents the first water content of the fir wood.
Preferably, in the step D, when data fitting is performed according to the obtained multiple sets of data to obtain a corresponding relationship between the second moisture content and the first moisture content of the wood.
In still another preferred and specific aspect of the present invention, in the step C, the second water content is calculated by the following formula:
y＝(W1-W2)/W2×100％
in the above equation, y represents the second moisture content of the wood sample, W1 represents the weight of the wood sample before drying, and W2 represents the weight of the wood sample after drying.
Preferably, the wood sample in the step a is a sample after preservation treatment, or the wood sample is also preserved in the step a.
Preferably, the step C is performed within 120 minutes after the step B is performed. More preferably, the step C is performed within 60 minutes after the step B is performed.
According to a preferred and specific aspect of the present invention, in the step C, a plurality of samples are taken from the wood sample, and are respectively dried to a constant weight, and the weights before and after drying are recorded, and the moisture content of each sample is calculated according to the weight difference, and then the average value of the moisture contents is calculated to obtain the second moisture content.
More preferably, in the step C, the wood sample is put into a drying oven to be dried to a constant weight, and then taken out and put to room temperature, and then the weight is weighed.
According to a preferred and specific aspect of the present invention, the nondestructive moisture meter is a Testo606-1 material moisture meter of Deutsche Meter (Shenzhen) Limited. By adopting the nondestructive moisture tester, the existing structural wood member is not damaged, the wood sample does not need to be intercepted for laboratory detection, and the moisture content which can be used for structure judgment is obtained according to the pre-constructed corresponding relation only by detecting the surface of the wood member.
The other technical scheme adopted by the invention is as follows:
a nondestructive testing method for the moisture content of an ancient building wood member comprises the following steps:
A. providing a wood sample, wherein the wood sample and wood used by the ancient building wood member to be detected belong to the same kind;
B. detecting the water content of the wood sample by using a nondestructive moisture tester, and recording as a first water content;
C. weighing the weight of the wood sample, drying the wood sample to constant weight, weighing the dried weight of the wood sample, obtaining the average water content from the surface layer to the inner layer of the wood sample according to the weight difference before and after drying, and recording as a second water content;
D. repeating the steps A to C for multiple times to obtain multiple groups of first water content and corresponding second water content data, and accordingly obtaining the corresponding relation between the second water content of the wood and the first water content;
E. and acquiring the water content data of the surface layer of the historic building wood member detected by the nondestructive moisture tester, and acquiring the average water content of the historic building wood member according to the corresponding relation.
Compared with the prior art, the invention has the following advantages by adopting the scheme:
according to the nondestructive testing method for the water content of the ancient building wood member, before field testing, the corresponding relation between the water content data of the wood, which is measured by the nondestructive moisture meter, and the average water content of the wood, which is obtained by the weighing method, is constructed in advance, and the average water content of the wood, which is obtained by the weighing method, is the average water content of the whole wood (a surface layer and an inner layer), so that the average water content of the ancient building wood member can be obtained by measuring the ancient building wood member by the nondestructive moisture meter according to the field and bringing the measured value into the corresponding relation, the water content condition of the whole wood member can be reflected to the maximum extent, the average water content of the whole wood member can be accurately obtained under the condition that the wood member is not damaged, and the; the existing structural wood member is not damaged, a wood sample does not need to be intercepted for laboratory detection, and the water content which can be used for structure judgment is obtained according to the pre-constructed corresponding relation only through detection on the surface of the wood member.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
FIG. 1 is a graph of mean moisture content and surface moisture content of fir trees fitted by a nondestructive testing method according to an embodiment of the invention.
Detailed Description
Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the advantages and features of the invention may be more readily understood by those skilled in the art. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto.
Testing instrument
Portable nondestructive moisture meter: text 606-1 model material moisture meter of Shenzhen (Shenzhen) Limited.
Oven: model 101-2 electrothermal constant temperature drying oven of Fulida test instrument factory in Shangyu.
An electronic balance: an electronic balance model WT2003CH from Steita balance instruments Inc., Changzhou.
Example 1
Selecting a plurality of fir woods as samples, wherein the fir woods are taken from different regions;
firstly, measuring the moisture content of the wood of each sample by using a movable portable moisture meter, and recording detection data to obtain a first moisture content data set, which is shown in the following table 1;
immediately intercepting 2-3 samples from each sample by using a sampling tool, wherein the size of each sample is 20mm multiplied by 20mm, weighing by using a balance, then putting the samples into a drying box to be dried for 8 hours at the temperature of (103 +/-2) DEG C until the weight is constant, taking the samples out, putting the samples at room temperature, weighing by using a balance, calculating the water content of the fir according to the formula y which is (W1-W2)/W2 multiplied by 100%, and recording related data to obtain a second water content data set, which is shown in the following table 1; in the above formula, y represents the second moisture content of the fir sample, W1 represents the weight of the fir sample before drying, and W2 represents the weight of the fir sample after drying;
comparing and counting the results obtained by the 2 methods, obtaining the corresponding relation between the detection result of the portable moisture meter and the real average moisture content (second moisture content) through data fitting, and referring to a fitting curve chart in figure 1, wherein the relation is as follows:
y＝0.1561x2-3.9539x+36.254
in the above formula, y represents the second water content of the fir, and x represents the first water content of the fir;
and measuring the water content of the fir member of the ancient building by adopting the portable water content measuring instrument on site, and substituting the measured water content into the relational expression to calculate the average water content of the fir member of the ancient building.
TABLE 1
Example 2
Selecting a plurality of pine woods as samples, wherein the pine woods are taken from different regions;
firstly, measuring the moisture content of the wood of each sample by using a movable portable moisture meter, and recording detection data to obtain a first moisture content data set;
immediately intercepting 2-3 samples from each sample by using a sampling tool, wherein the size of each sample is 20mm multiplied by 20mm, weighing by using a balance, then putting the samples into a drying box, drying for 8 hours at the temperature of (103 +/-2) DEG C until the weight is constant, taking the samples out, placing the samples at room temperature, weighing by using a balance, calculating the moisture content of the pine wood according to the formula y which is (W1-W2)/W2 multiplied by 100%, and recording related data to obtain a second moisture content data set; in the above formula, y represents the second moisture content of the pine sample, W1 represents the weight of the pine sample before drying, and W2 represents the weight of the pine sample after drying;
comparing and counting the results obtained by the 2 methods, and obtaining the corresponding relation between the detection result of the portable moisture meter and the real average moisture content (second moisture content) through data fitting;
and measuring the water content of the pine component of the ancient building by adopting the portable water content measuring instrument on site, and substituting the measured water content into the relational expression to calculate the average water content of the pine component of the ancient building.
Example 3
Selecting a plurality of nanmu wood as samples, wherein the nanmu wood is taken from different areas;
firstly, measuring the moisture content of the wood of each sample by using a movable portable moisture meter, and recording detection data to obtain a first moisture content data set;
immediately intercepting 2-3 samples from each sample by using a sampling tool, wherein the size of each sample is 20mm multiplied by 20mm, weighing by using balance, then putting the samples into a drying oven to be dried to constant weight, taking the samples out, placing the samples at room temperature, weighing by using a balance, calculating the water content of the nanmu according to a formula y which is (W1-W2)/W2 multiplied by 100%, and recording related data to obtain a second water content data set; in the above formula, y represents the second moisture content of the nanmu sample, W1 represents the weight of the nanmu sample before drying, and W2 represents the weight of the dried nanmu sample;
comparing and counting the results obtained by the 2 methods, and obtaining the corresponding relation between the detection result of the portable moisture meter and the real average moisture content (second moisture content) through data fitting;
and (3) measuring the water content of the nanmu members of the ancient building on site by adopting the portable moisture meter, and calculating the average water content of the nanmu members of the ancient building by substituting the water content into the relational expression.
Example 4
This example is substantially the same as example 1 except that: before testing the water content, the fir sample is subjected to antiseptic treatment in advance.
The invention adopts two processes to respectively measure the moisture content of the wood with the same type as the wood component of the ancient building to be measured in advance, wherein one process is a nondestructive testing process which can realize nondestructive testing but is not suitable for wood component testing, and particularly can not accurately measure the moisture content of the inner layer of the wood; the other method is a standard wood moisture content detection method specified by national standards, has reliable and accurate detection results, can reflect the whole moisture content conditions of the surface layer and the inner layer of the wood, but needs to destroy the wood; then, the water content data measured by the two processes are subjected to a statistical method to obtain the corresponding relation between the two processes; during field detection, the moisture content of the ancient building wood member is detected only by the nondestructive moisture meter, and then the result measured by the nondestructive moisture meter is corrected according to the corresponding relation to obtain the average moisture content of the whole wood member, so that the moisture content of the surface layer and the inner layer of the wood member can be truly reflected to the greatest extent, nondestructive detection can be realized, and the detection result is accurate.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and are preferred embodiments, which are intended to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the scope of the present invention. All equivalent changes or modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (10)
1. A nondestructive testing method for the water content of an ancient building wood member is characterized by comprising the following steps:
A. providing a wood sample, wherein the wood sample and wood used by the ancient building wood member to be detected belong to the same kind;
B. detecting the water content of the wood sample by using a nondestructive moisture tester, and recording as a first water content;
C. weighing the weight of the wood sample, drying the wood sample to constant weight, weighing the dried weight of the wood sample, obtaining the average water content from the surface layer to the inner layer of the wood sample according to the weight difference before and after drying, and recording as a second water content;
D. repeating the steps A to C for multiple times to obtain multiple groups of first water content and corresponding second water content data, and accordingly obtaining the corresponding relation between the second water content of the wood and the first water content;
E. and detecting the water content of the surface layer of the historic building wood member by using the nondestructive moisture tester, and obtaining the average water content of the historic building wood member according to the corresponding relation.
2. The nondestructive testing method according to claim 1, wherein the wood sample provided in step a is fir, and the correspondence between the second water content and the first water content of the fir obtained in step D is as follows:
y＝0.1561x2-3.9539x+36.254
in the above formula, y represents the second water content of the fir wood, and x represents the first water content of the fir wood.
3. The nondestructive testing method according to claim 1 or 2, wherein in the step D, a corresponding relation between the second moisture content and the first moisture content of the wood is obtained by performing data fitting according to the obtained plurality of sets of data.
4. The nondestructive testing method according to claim 1, wherein in the step C, the second water content is calculated by the following formula:
y＝(W1-W2)/W2×100％
in the above equation, y represents the second moisture content of the wood sample, W1 represents the weight of the wood sample before drying, and W2 represents the weight of the wood sample after drying.
5. The nondestructive testing method according to claim 1, wherein said wood sample in said step a is a sample after preservation treatment, or said wood sample is further preserved in said step a.
6. The nondestructive testing method according to claim 1, wherein said step C is performed within 120 minutes after completion of said step B.
7. The nondestructive testing method according to claim 1, wherein in the step C, a plurality of samples are cut from the wood sample, and the samples are dried to a constant weight, and the weights before and after drying are recorded, and the moisture content of each sample is calculated from the weight difference, and the second moisture content is obtained by averaging the moisture contents.
8. The nondestructive testing method according to claim 7, wherein in the step C, the wood sample is put into a drying oven to be dried to a constant weight, taken out and placed to room temperature, and then weighed.
9. The nondestructive testing method of any one of claims 1, 2 or 4 to 8, wherein said nondestructive moisture meter is a Testo606-1 type material moisture meter of Derman Meter (Shenzhen) Limited.
10. A nondestructive testing method for the water content of an ancient building wood member is characterized by comprising the following steps:
A. providing a wood sample, wherein the wood sample and wood used by the ancient building wood member to be detected belong to the same kind;
B. detecting the water content of the wood sample by using a nondestructive moisture tester, and recording as a first water content;
C. weighing the weight of the wood sample, drying the wood sample to constant weight, weighing the dried weight of the wood sample, obtaining the average water content from the surface layer to the inner layer of the wood sample according to the weight difference before and after drying, and recording as a second water content;
D. repeating the steps A to C for multiple times to obtain multiple groups of first water content and corresponding second water content data, and accordingly obtaining the corresponding relation between the second water content of the wood and the first water content;
E. and acquiring the water content data of the surface layer of the historic building wood member detected by the nondestructive moisture tester, and acquiring the average water content of the historic building wood member according to the corresponding relation.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103808624A (en) * | 2014-02-21 | 2014-05-21 | 北京林业大学 | Wood moisture content detection method based on radar waves |
| CN206892023U (en) * | 2017-04-13 | 2018-01-16 | 深圳市凯利博实业有限公司 | Moisture detector |
| CN108445051A (en) * | 2018-05-17 | 2018-08-24 | 浩辰弘明（北京）科技有限公司 | A kind of online device for testing moisture content of wood |
| CN110118700A (en) * | 2018-07-19 | 2019-08-13 | 中国农业科学院作物科学研究所 | A kind of method of non-destructive prediction corn kernel moisture content |
-
2021
- 2021-03-05 CN CN202110243308.9A patent/CN113092303A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103808624A (en) * | 2014-02-21 | 2014-05-21 | 北京林业大学 | Wood moisture content detection method based on radar waves |
| CN206892023U (en) * | 2017-04-13 | 2018-01-16 | 深圳市凯利博实业有限公司 | Moisture detector |
| CN108445051A (en) * | 2018-05-17 | 2018-08-24 | 浩辰弘明（北京）科技有限公司 | A kind of online device for testing moisture content of wood |
| CN110118700A (en) * | 2018-07-19 | 2019-08-13 | 中国农业科学院作物科学研究所 | A kind of method of non-destructive prediction corn kernel moisture content |
Non-Patent Citations (1)
| Title |
|---|
| 韩书霞: ""基于CT技术和分形特征的木材物理性质及缺陷检测研究"", 《CNKI博士电子期刊》 * |
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