CN111366685A - Method for calculating water content of air-dried bamboo - Google Patents
Method for calculating water content of air-dried bamboo Download PDFInfo
- Publication number
- CN111366685A CN111366685A CN202010234661.6A CN202010234661A CN111366685A CN 111366685 A CN111366685 A CN 111366685A CN 202010234661 A CN202010234661 A CN 202010234661A CN 111366685 A CN111366685 A CN 111366685A
- Authority
- CN
- China
- Prior art keywords
- bamboo
- moisture content
- air
- calculating
- daily
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0098—Plants or trees
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Wood Science & Technology (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Botany (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
Abstract
The invention discloses a method for calculating the water content of a round bamboo air-dried material, which comprises the following steps: testing the initial water content of the moso bamboo round bamboo; in the air drying process, monitoring the values of the environmental temperature, humidity and wind speed parameters; establishing a formula of the moisture content of the air-dried material relative to the environmental parameters, substituting the numerical values of the actually measured environmental parameters into the formula, respectively calculating daily moisture content reduction values of the bamboo, carrying out correlation test on the daily moisture content reduction values and the corresponding actual moisture content reduction values of the bamboo to obtain formula coefficients, and establishing a moisture content calculation model; and calculating to obtain the instant moisture content of the air-dried bamboo by using the moisture content calculation model and the initial moisture content of the round bamboo and the daily environmental parameter value. The method can be widely used for accurately calculating the water content of moso bamboos cut in different areas and different seasons in the air drying process, fills up and solves the blank of a calculation model of the water content of a large amount of bamboo raw materials of a round bamboo processing enterprise, provides great convenience for the bamboo processing enterprise, and provides an accurate water content value for the subsequent processing of the bamboo.
Description
Technical Field
The invention relates to the technical field of bamboo drying, in particular to a method for calculating the moisture content of a round bamboo air-dried material.
Background
Bamboo resources in China are abundant, the original utilization of various bamboo materials mainly comprising moso bamboos has the characteristics of easiness in processing, cost economy and environmental protection, natural round bamboos are popular with people from ancient times to present, and the natural round bamboos are mainly embodied in round bamboo furniture, round bamboo buildings, handicraft products and various indoor decorative bamboo materials. The original state utilization of the bamboo wood mainly adopts a round bamboo material, so that the smooth outer wall and the complete bamboo joint of the bamboo wood are reserved to the greatest extent, and the special cultural connotation of the bamboo wood is embodied; but due to the inherent defect that the bamboo is cracked because of the reduction of the moisture content in the drying process, the appearance and the service life of the round bamboo product are greatly influenced. Meanwhile, the round bamboo is cracked due to the reduction of the water content, and the cracking is likely to occur not only in the drying process, but also in the transportation and storage links after the bamboo is cut; the utilization rate of the bamboo is reduced, and the processing difficulty and the cost of the original utilization of the bamboo are increased to a great extent.
The moso bamboo begins to lose water after being harvested, and the water loss rate is greatly influenced by the environment in the air drying process. However, the air-drying water loss rate of the round bamboo is not accurately calculated by a calculation method or a calculation model at present, so that the instant water content of the air-dried round bamboo cannot be estimated, the difficulty is brought to accurately judge the instant water content of the air-dried round bamboo, and the product defect of the round bamboo is easily caused by insufficient drying or excessive drying.
Disclosure of Invention
The invention aims to provide a method for calculating the moisture content of a round bamboo air-dried material, which fills and solves the blank of a calculation model of the moisture content of a bulk bamboo raw material of a round bamboo processing enterprise.
The invention realizes the purpose through the following technical scheme:
a method for calculating the water content of air-dried bamboo comprises
The method comprises the following steps: testing the initial water content of the moso bamboo round bamboo;
step two: monitoring the values of environmental parameters including temperature, humidity and wind speed during the air drying process;
step three: establishing a formula of the moisture content of the air-dried material relative to the environmental parameters, substituting numerical variables of the actually measured environmental parameters into the formula, respectively calculating daily moisture content reduction values of the bamboo, carrying out correlation test on the daily moisture content reduction values and corresponding actual moisture content reduction values of the bamboo to obtain formula coefficients, and establishing a moisture content calculation model;
step four: and calculating to obtain the instant moisture content of the air-dried bamboo by using the moisture content calculation model and the initial moisture content of the round bamboo and the daily environmental parameter value.
The further improvement is that in the first step, the initial water content of the moso bamboos newly fed in every day is randomly inspected batch by day, the inspection batch of every day is combined with actual production and is determined according to 13.1 division in the wood structure engineering construction quality research specification GB50206-2012, and the water content testing method is executed according to the wood water content determination method GB 1931-2009.
The further improvement is that in the sampling inspection, 5 tons or 300 moso bamboos are taken as an inspection batch, the sampling inspection proportion of each inspection batch is not lower than 3 percent, and less than 300 moso bamboos are counted by one inspection batch.
The further improvement is that during the moisture content test, the moisture content of the bamboo section is respectively cut at the position 0.5 meter away from the base part and the tip part of the moso bamboo, and the average value of the moisture content of the base part and the tip part of the sampling inspection bamboo section which are actually measured is used as the initial moisture content of the bamboo of the inspection batch.
The further improvement is that in the second step, the daily average of the ambient temperature and humidity values is calculated according to the ground meteorological observation standard air temperature and humidity GB35226-2017, and the daily average of the ambient wind speed values is calculated according to the ground meteorological observation standard wind direction and wind speed GB 35227-22017.
In the third step, the formula is two optimized formulas:
ΔM＝aMbTcHdVe(1)
ΔM＝a+bM+cT+dH+eV (2)
where Δ M is the daily water content reduction value in units: percent; m is the water content value on the previous day, unit: percent; t is the daily temperature mean, in units: DEG C; h is the average daily air humidity in units: percent; v is the daily wind speed mean in units: m/s; a. b, c, d and e are coefficients;
the calculation model is as follows:
wherein each coefficient is a is more than or equal to 0.0541≤0.975，0.798≤b1≤1.955，0.827≤c1≤1.300，-2.123≤d1≤-1.755，0.013≤e1≤0.155，0.160≤a2≤0.876，0.006≤b2≤0.032，0.002≤c2≤0.032，-0.018≤d2≤-0.010，-0.069≤e2≤0.080。
The invention has the beneficial effects that: the air-drying moisture content calculation model of the moso bamboo round bamboo is developed based on the ambient temperature, the humidity and the wind speed, can be widely used for accurately calculating the moisture content of the moso bamboo which is cut in different regions and different seasons in the air-drying process, fills up and solves the blank of the moisture content calculation model of a large amount of bamboo raw materials of a round bamboo processing enterprise, provides great convenience for the bamboo processing enterprise, and also provides an accurate moisture content value for the subsequent processing of the bamboo.
Detailed Description
The present application is described in further detail below, and it should be noted that the following detailed description is provided for illustrative purposes only, and is not intended to limit the scope of the present application, which is defined by the appended claims.
The embodiment of the method for calculating the water content of the air-dried bamboo comprises the following steps:
1.1 initial moisture content test of Mao bamboo round bamboo
In actual production, the moso bamboos belong to a large amount of production materials, and the initial water content is not practical by testing the moso bamboos one by one, so that the initial water content of the moso bamboos newly fed each day is selected and checked one by taking the day as a unit; taking all round moso bamboos entering the field one day as an example, combining the inspection lot of each day with actual production and determining according to 13.1 division in the Wood Structure engineering construction quality research Specification GB50206-2012, wherein each 5 tons or 300 moso bamboos are one inspection lot, the sampling inspection proportion of each inspection lot is not less than 3%, and less than 300 moso bamboos are counted by one inspection lot; the moisture content testing method is executed by referring to 'method for measuring moisture content of wood' GB1931-2009 respectively, considering that the end face of the bamboo wood is a main moisture evaporation face, respectively intercepting initial moisture content tests from a position 0.5 m away from the base and the tip cross section, testing the initial moisture content, and taking the actually measured average value of the initial moisture content of the base and the tip of the sampling inspection bamboo wood as the initial moisture content of the inspection batch of bamboo wood.
1.2 day average ambient temperature, humidity, wind speed monitoring
1.2.1 day average ambient temperature monitoring
And calculating the daily average environmental temperature and humidity values according to the ground meteorological observation standard air temperature and humidity GB 35226-2017.
1.2.2 day average wind speed monitoring
And calculating the daily average environmental wind speed value according to the standard wind direction and wind speed of ground meteorological observation GB 35227-22017.
Selecting 10 batches of newly-fed moso bamboos in 3 months to 9 months in 2019, and respectively testing the initial water content of the moso bamboo round bamboos and monitoring the average daily environmental temperature, humidity and wind speed. The results of the testing and monitoring are plotted in a table, showing the statistical results for one of the batches.
Table one: initial moisture content test of moso bamboo round bamboo and daily average environmental temperature, humidity and wind speed monitoring
1.3 calculation model of water content of Mao bamboo round bamboo
1.3.1 calculation formula
And (2) substituting the actually measured environmental parameter variable values into a formula by adopting two optimized calculation formulas (1) and (2), respectively calculating the daily water content reduction value of the bamboo, carrying out correlation test on the daily water content reduction value of the bamboo, and carrying out fitting calculation to obtain each formula coefficient.
ΔM＝aMbTcHdVe(1)
ΔM＝a+bM+cT+dH+eV (2)
Wherein Δ M is a daily water content reduction value (unit:%); m is the water content value (unit:%) of the previous day; t is the average temperature per day (unit:. degree. C.); h is the average daily air humidity (unit:%); v is the average daily wind speed (unit: m/s); a. b, c, d, e are coefficients.
Also taking the lot shown in table one above as an example, the correlation test is performed, wherein a part of the calculation process is shown in table two:
table two: correlation test
SUMMARY
OUTPUT
Analysis of variance
The correlation test for the batches shown in table one was performed in the same manner, with the test results: when the water content value is ≧ 35%, the formula (1) is satisfied, and each formula coefficient is a ═ 0.524, b ═ 1.202, c ═ 1.040, d ═ 1.864, and e ═ 0.095; when the moisture content value is < 35%, equation (2) is satisfied, and the coefficients of each equation are a ═ 0.385, b ═ 0.011, c ═ 0.025, d ═ 0.014, and e ═ 0.041.
Similarly, the correlation test of all other batches was completed, and the results are shown in table three and table four:
table three: model coefficient value when water content value ≧ 35%
Table four: model coefficient value when moisture value < 35%
1.3.2 computational model
Through actual test and mao bamboo circle bamboo air-drying characteristic, obtain calculation model (3), utilize this model, according to the initial moisture content of mao bamboo and daily environmental parameter numerical value in actual production, alright obtain the instant moisture content of bamboo timber, this provides very big facility for bamboo timber processing enterprise, also provides accurate moisture content value for the subsequent processing of bamboo timber.
Wherein each coefficient is a is more than or equal to 0.0541≤0.975，0.798≤b1≤1.955，0.827≤c1≤1.300，-2.123≤d1≤-1.755，0.013≤e1≤0.155，0.160≤a2≤0.876，0.006≤b2≤0.032，0.002≤c2≤0.032，-0.018≤d2≤-0.010，-0.069≤e2≤0.080。
(II) feasibility verification
2.1, calculating the water content of the bamboo wood randomly extracted from the 10 batches by using a calculation model (3) to obtain a model predicted value of the daily water content difference, comparing the model predicted value with the daily water content difference of the actual measurement value on the day, and obtaining the result shown in the fifth table:
table five: model predictionComparison of the measured value with the actual measured value on the day
2.2 conclusion
The comparison result in the table five shows that the daily moisture content difference calculated by the model is basically consistent with the measured value, and the scientific basis for judging the drying degree of the bamboo is obtained, so that the accurate moisture content value can be provided for the subsequent processing of the bamboo, and the method is proved to be feasible.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (6)
1. A method for calculating the water content of a round bamboo air-dried material is characterized by comprising the following steps: comprises that
The method comprises the following steps: testing the initial water content of the moso bamboo round bamboo;
step two: monitoring the values of environmental parameters including temperature, humidity and wind speed during the air drying process;
step three: establishing a formula of the moisture content of the air-dried material relative to the environmental parameters, substituting numerical variables of the actually measured environmental parameters into the formula, respectively calculating daily moisture content reduction values of the bamboo, carrying out correlation test on the daily moisture content reduction values and corresponding actual moisture content reduction values of the bamboo to obtain formula coefficients, and establishing a moisture content calculation model;
step four: and calculating to obtain the instant moisture content of the air-dried bamboo by using the moisture content calculation model and the initial moisture content of the round bamboo and the daily environmental parameter value.
2. The method for calculating the moisture content of the round bamboo air-dried material as claimed in claim 1, wherein the method comprises the following steps: in the first step, the initial water content of moso bamboos newly fed in every day is sampled and inspected batch by day, the inspection batch of every day is determined by combining actual production and referring to 13.1 division in the Wood Structure engineering construction quality research Specification GB50206-2012, and the water content testing method is executed by referring to the Wood Water content determination method GB 1931-2009.
3. The method for calculating the moisture content of the round bamboo air-dried material as claimed in claim 2, wherein the method comprises the following steps: during spot inspection, 5 tons or 300 moso bamboos are taken as an inspection batch, the spot inspection proportion of each inspection batch is not less than 3 percent, and less than 300 moso bamboos are counted by one inspection batch.
4. The method for calculating the moisture content of the round bamboo air-dried material as claimed in claim 2, wherein the method comprises the following steps: and during the moisture content test, respectively cutting off the bamboo sections at the positions 0.5 meters away from the base parts and the tip parts of the moso bamboos, testing the moisture content of the bamboo sections, and taking the average value of the moisture content of the base parts and the tip parts of the actually-tested bamboo sections of the sampling inspection bamboo as the initial moisture content of the bamboo of the inspection batch.
5. The method for calculating the moisture content of the round bamboo air-dried material as claimed in claim 1, wherein the method comprises the following steps: and in the second step, calculating the daily average value of the ambient temperature and humidity values according to the ground meteorological observation standard air temperature and humidity GB35226-2017, and calculating the daily average value of the ambient wind speed values according to the ground meteorological observation standard wind direction and wind speed GB 35227-22017.
6. The method for calculating the moisture content of the round bamboo air-dried material as claimed in claim 1, wherein the method comprises the following steps: in step three, the formula is two optimized formulas:
ΔM＝aMbTcHdVe(1)
ΔM＝a+bM+cT+dH+eV (2)
where Δ M is the daily water content reduction value in units: percent; m is the water content value on the previous day, unit: percent; t is the daily temperature mean, in units: DEG C; h is the average daily air humidity in units: percent; v is the daily wind speed mean in units: m/s; a. b, c, d and e are coefficients;
the calculation model is as follows:
wherein each coefficient is a is more than or equal to 0.0541≤0.975，0.798≤b1≤1.955，0.827≤c1≤1.300，-2.123≤d1≤-1.755，0.013≤e1≤0.155，0.160≤a2≤0.876，0.006≤b2≤0.032，0.002≤c2≤0.032，-0.018≤d2≤-0.010，-0.069≤e2≤0.080。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010234661.6A CN111366685A (en) | 2020-03-30 | 2020-03-30 | Method for calculating water content of air-dried bamboo |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010234661.6A CN111366685A (en) | 2020-03-30 | 2020-03-30 | Method for calculating water content of air-dried bamboo |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111366685A true CN111366685A (en) | 2020-07-03 |
Family
ID=71209270
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010234661.6A Pending CN111366685A (en) | 2020-03-30 | 2020-03-30 | Method for calculating water content of air-dried bamboo |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111366685A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102841031A (en) * | 2012-08-29 | 2012-12-26 | 东北林业大学 | Method for estimating water content of live stumpage sapwood |
| CN104237056A (en) * | 2014-06-13 | 2014-12-24 | 吉林大学 | Humidity and temperature monitoring-based method for detecting moisture of grains at internal points of granary |
| CN104390932A (en) * | 2014-11-12 | 2015-03-04 | 中南林业科技大学 | Method for detecting moisture content of wood on basis of infrared differential spectrum technology |
| CN108802352A (en) * | 2017-07-28 | 2018-11-13 | 北京林业大学 | Measurement of water-content coefficient method and method for drying wood in timber drying |
-
2020
- 2020-03-30 CN CN202010234661.6A patent/CN111366685A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102841031A (en) * | 2012-08-29 | 2012-12-26 | 东北林业大学 | Method for estimating water content of live stumpage sapwood |
| CN104237056A (en) * | 2014-06-13 | 2014-12-24 | 吉林大学 | Humidity and temperature monitoring-based method for detecting moisture of grains at internal points of granary |
| CN104390932A (en) * | 2014-11-12 | 2015-03-04 | 中南林业科技大学 | Method for detecting moisture content of wood on basis of infrared differential spectrum technology |
| CN108802352A (en) * | 2017-07-28 | 2018-11-13 | 北京林业大学 | Measurement of water-content coefficient method and method for drying wood in timber drying |
Non-Patent Citations (4)
| Title |
|---|
| 刘万龙等: "江西南昌典型林分地表死可燃物含水率预测", 《中南林业科技大学学报》 * |
| 李建民: "黑龙江省庆安县可燃物含水率动态及预测模型", 《中国优秀硕士学位论文全文数据库（电子期刊）》 * |
| 蔡则谟等: "海口地区板材气干试验", 《木材工业》 * |
| 黄雨三主编: "《最新人造板制造加工工艺与质量检验检测标准规范实用手册 上》", 30 September 2003 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107464020B (en) | Method for rapidly screening rice product processing raw materials | |
| CN110929347A (en) | Hot continuous rolling strip steel convexity prediction method based on gradient lifting tree model | |
| CN104931453A (en) | Method for predicting water content of spread green leaves of green tea based on near infrared spectrum technology | |
| Yu et al. | Gust factors and turbulence intensities for the tropical cyclone environment | |
| De Boever et al. | End-use related physical and mechanical properties of selected fast-growing poplar hybrids (Populus trichocarpa $\times $ P. deltoides) | |
| CN104899424B (en) | A kind of cured tobacco leaf maturity and blade construction objective measure based on microscopic feature | |
| CN106918525A (en) | A kind of offal volume change detection method | |
| CN111366685A (en) | Method for calculating water content of air-dried bamboo | |
| CN104132865A (en) | Method for predicting density of wood of loblolly pine by utilizing near-infrared spectrum technology | |
| CN109916971B (en) | Rapid nondestructive testing method for fresh tobacco moisture based on capacitor | |
| CN110852615A (en) | Comprehensive reliability evaluation model for intelligent electric energy meter in typical environment | |
| CN108685146B (en) | Method for measuring and calculating structural distribution range of threshing and redrying leaves based on conversion transfer equation | |
| Zhong et al. | Reliability analysis for the bending strength of larch 2× 4 lumber | |
| CN103675218B (en) | A kind of papermaking-method reconstituted tobaccos slurry uniformity coefficient characterizing method | |
| CN114330478B (en) | Wind speed classification correction method for wind speed forecast of power grid | |
| CN109239003A (en) | A kind of lignin moisture content detecting method based on Subtractive Infrared Spectroscopy | |
| Montero et al. | General, physical and mechanical properties, termites resistance and drying defects of lumber of Tectona grandis from plantations of different climatic and sites fertility condition | |
| CN114414045A (en) | Calibration method of solar radiometer | |
| CN106092910A (en) | A kind of detection method of jujube tree canopy nitrogen content | |
| CN106092912A (en) | A kind of detection method of jujube tree canopy moisture | |
| CN108037097B (en) | Method for rapidly detecting maturity of mushroom sticks | |
| CN113567489A (en) | Method for evaluating sorghum by enthalpy value | |
| CN106683094A (en) | Quality evaluation method of wood veneer crack appearance | |
| CN108763784B (en) | Guizhou ancient tea tree age determination method | |
| CN208156009U (en) | A kind of sawn timber surface quality grades dividing device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200703 |
|
| RJ01 | Rejection of invention patent application after publication |