CN103543172B - A kind of measuring and calculating device of coefficient of linear thermal expansion and measuring method - Google Patents
A kind of measuring and calculating device of coefficient of linear thermal expansion and measuring method Download PDFInfo
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- CN103543172B CN103543172B CN201210236676.1A CN201210236676A CN103543172B CN 103543172 B CN103543172 B CN 103543172B CN 201210236676 A CN201210236676 A CN 201210236676A CN 103543172 B CN103543172 B CN 103543172B
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Abstract
The present invention relates to a kind of measuring method and device of coefficient of linear thermal expansion, the method comprises: provide measuring and calculating device, comprise constant temperature oven, carrier, keeper, meter and read table, carrier has the positioning area of assignment test part, keeper and meter lay respectively at wherein one side of positioning area, read table to be located on constant temperature oven and to be electrically connected with meter, and meter has table body and can the measurement dish that slides of phase his-and-hers watches body; Carrier and test block are placed in constant temperature oven, make test block be positioned at positioning area, and wherein both sides contact with the measurement dish of meter with keeper respectively; The temperature of constant temperature oven is remained on T1, after the stable reading of read table, records detection data, be designated as L1; The temperature of constant temperature oven is risen to T2 and constant temperature, after the stable reading of read table, records detection data, be designated as L2; Calculate coefficient of linear thermal expansion=(L2-L1)/(L1 × Δ T).The present invention measures accurately, human factor can be avoided the impact of measurement result.
Description
Technical field
The present invention relates to a kind of measuring and calculating device and method of coefficient of linear thermal expansion, especially relate to the measuring and calculating device and method of PVC plastic glue floor tile coefficient of linear thermal expansion.
Background technology
Thermal expansion refers to the breathing phenomenon that the volume of object or length exist along with temperature change, and its changing capability is to wait pressure, and unit temperature changes the length variations caused, and namely thermal expansivity represents.Thermal expansivity is one of Main physical performance of material, and it is very crucial data in Material selec-tion and structural design.
Thermal expansivity has coefficient of volumetric expansion β and linear expansion coefficient α two kinds, wherein linear expansion coefficient α=Δ L/ (L* Δ T), and in formula, Δ L is the change of object length under given temperature variation Δ T, and L is initial length.
For being similar to the object regarding one dimension as, length is exactly weigh the determinative of its volume, and thermal expansivity at this moment can simplify and is defined as: unit temperature changes the lower recruitment of length and the ratio of raw footage, namely linear expansion coefficient.
At present, the existing measuring method to coefficient of linear thermal expansion is generally object under test is placed in constant temperature oven heat, until constant temperature stable after, then take out object under test to measure the size of object under test at this temperature; Then object under test is put under constant temperature oven heats to another temperature again, take out the size that object under test measures object under test at this temperature again, linear expansion coefficient can be calculated, but it is this owing to object under test to be taken out the mode measured, object under test can change taking out temperature in process, length dimension measured by it also can change, and therefore finally affects the measurement accuracy of the linear expansion coefficient of object under test.
Summary of the invention
Technical matters to be solved by this invention be to provide a kind of accurately, can the measurement mechanism of coefficient of linear thermal expansion of easy operation.
Another technical matters that will solve of the present invention is to provide a kind of measuring method utilizing above-mentioned measurement mechanism to carry out the coefficient of linear thermal expansion measured.
For solving the problems of the technologies described above, technical scheme of the present invention is achieved in that
A kind of measuring and calculating device of coefficient of linear thermal expansion, comprise constant temperature oven, carrier, keeper, meter and read table, described carrier is placed horizontally in described constant temperature oven, described carrier has the positioning area for assignment test part, described keeper and meter lay respectively at one of them limit of described positioning area, described read table to be located on constant temperature oven and to be electrically connected with described meter, and described meter has a table body and can the measurement dish that slides of phase his-and-hers watches body.
According to one embodiment of present invention, described keeper is positioned at the middle part of carrier, and described meter is located at the outside of carrier.
According to one embodiment of present invention, described carrier comprises at least two sidewalls, and described positioning area is surrounded by described sidewall and described keeper and formed.
According to one embodiment of present invention, described meter is positioned at the outside of one of them sidewall, and described measurement dish puts in carrier through one of them sidewall described.
According to one embodiment of present invention, described keeper is made up of a registration bolt.
According to one embodiment of present invention, described keeper is made up of two registration bolts, and described two registration bolts are that vertical angle is arranged.
According to one embodiment of present invention, described read table is located at constant temperature oven outside.
According to one embodiment of present invention, described meter is digital display dial gauge, and described carrier is corrosion resistant plate.
A measuring method for coefficient of linear thermal expansion, comprises the steps: to provide the measuring and calculating device of above-mentioned coefficient of linear thermal expansion; Carrier and test block are placed in constant temperature oven, make test block be positioned at positioning area, and it at least wherein contacts with the measurement dish of meter with keeper on both sides respectively; The temperature of constant temperature oven is remained on T1, utilizes the change in size of read table observation test part, after the stable reading of read table, record detection data, be designated as L1; The temperature of constant temperature oven is risen to T2 and constant temperature, after the stable reading of read table, records detection data, be designated as L2; Calculate coefficient of linear thermal expansion=(L2-L1)/(L1 × Δ T), Δ T is temperature change value T2-T1.
According to one embodiment of present invention, the coefficient of linear thermal expansion of described test block is the mean value of the multiple result of calculations utilizing said method to draw.
Beneficial effect of the present invention: test block need take out outside constant temperature oven and measure by coefficient of linear thermal expansion measuring method of the present invention different method in the past like that, namely avoids the different size impact to test block of extraneous temperature, thus ensures the accuracy of measurement.And coefficient of linear thermal expansion detection method of the present invention uses size measurement instruments to measure the change in size of test block completely, effectively prevent the impact of human factor on testing result, and structure of the present invention is simple, cost is low, reliably easy and simple to handle, be applicable to the measuring and calculating of the coefficient of linear thermal expansion of multiple material, be especially suitable for the coefficient of linear thermal expansion measuring and calculating of PVC plastic glue floor tile.
Above-mentioned explanation is only the general introduction of technical solution of the present invention, in order to technological means of the present invention can be better understood, and can be implemented according to the content of instructions, and can become apparent to allow above and other object of the present invention, feature and advantage, below especially exemplified by preferred embodiment, and coordinate accompanying drawing, be described in detail as follows.
Accompanying drawing explanation
Fig. 1 is the structural representation of carrier in the present invention.
Embodiment
For further setting forth the present invention for the technological means reaching predetermined goal of the invention and take and effect, below in conjunction with accompanying drawing and preferred embodiment, to measuring and calculating device and its embodiment of measuring method, structure, feature and effect thereof of the coefficient of linear thermal expansion proposed according to the present invention, be described in detail as follows.
The measuring and calculating device of coefficient of linear thermal expansion of the present invention comprises constant temperature oven, carrier, keeper, meter and read table.
Wherein, described carrier is a stainless steel flat plate, and described meter is a digital display dial gauge.As shown in Figure 1, described carrier 10 comprises two sidewalls 11.Described meter 20 is positioned at the outside of described sidewall 11, it comprise a table body 21 and can phase his-and-hers watches body 21 slide measurement dish 22.Described measurement dish 22 puts in carrier 10 through described sidewall 11.Described keeper 30 is positioned at the middle part of carrier 10, and it comprises two rows is the pilot pin 31 that vertical angle is arranged, the sidewall 11 of described pilot pin 31 and carrier 10 surrounds the positioning area 40 of formation one for fixing test part.Described read table to be located on constant temperature oven and to be electrically connected by connecting line with described meter 20, and the length of connecting line is wanted to ensure that read table can be placed on the outside of constant temperature oven.
In the present embodiment, described keeper 30 comprises two registration bolts 31, in other embodiments of the invention, keeper 30 also only can comprise a registration bolt 31, comprise in the embodiment of a registration bolt 31 at keeper 30, carrier 10 comprises three sidewalls 11, forms positioning area 40 to surround with described pilot pin 31.In addition, in the present invention, can according to the demand of test by a sidewall 11 located therein for meter 20 or two sidewalls 11.
The measuring method of coefficient of linear thermal expansion of the present invention comprises the steps:
The measuring and calculating device of above-mentioned coefficient of linear thermal expansion is provided;
Undetected object type is cut into square specification, such as, is of a size of 12 〞 * 12 〞, as test block;
Carrier 10 is lain in a horizontal plane in constant temperature oven, and by connecting line, the read table of outside is connected with the meter 20 on carrier 10;
Test block is placed on carrier 10, and wherein two adjacent edges of test block are abutted against the pilot pin 31 on carrier 10 surface, another two adjacent edges of described test block contact with the measurement dish 22 of the meter 20 at carrier 10 edge, make meter 20 can measure the vertical lateral dimension of test block accurately;
The temperature of constant temperature oven is remained on T1 (such as 20 ± 1 DEG C), constant temperature is carried out to test block, utilize the change in size of the read table observation test part be placed on outside constant temperature oven, (such as continue 10min reading not change) after the stable reading of read table, record detection data, be designated as L1;
The temperature of constant temperature oven is risen to T2 (such as 50 ± 1 DEG C) and constant temperature, after the stable reading of read table, record detection data, be designated as L2;
Calculate coefficient of linear thermal expansion=(L2-L1)/(L1 × Δ T), Δ T is temperature change value T2-T1.
Can draw the coefficient of linear thermal expansion of corresponding test material thus, the coefficient of linear thermal expansion of above-mentioned test block is the mean value of multiple result of calculations that said method draws, to increase measurement result accuracy.
In the present invention, carrier and test block can put into constant temperature oven simultaneously in the present invention, also successively can put into constant temperature oven.In the present invention, described test block also can be other size, or rectangle structure, and the temperature of constant temperature oven also can be in other temperature range, does not all affect the measurement of coefficient of linear thermal expansion of the present invention.
The present invention converts the change of the straight-line dimension of test block to by digital display dial gauge the rotary motion of pointer, then on index dial, carries out reading, accurate measurement, and it is convenient to read.
Test block need need not take out outside constant temperature oven with detection method in the past by the measuring method of coefficient of linear thermal expansion of the present invention like that to be measured, and avoids the different size impact to test block of extraneous temperature, thus ensures the accuracy of detection.
This thermal expansivity detection method uses instrument to measure the change in size of test block completely, effectively prevent the impact of human factor on testing result, makes testing result more accurate.
Everyly do not depart from technical solution of the present invention content, any simple modification done above embodiment according to technical spirit of the present invention, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.
Claims (9)
1. the measuring and calculating device of a coefficient of linear thermal expansion, it is characterized in that: it comprises constant temperature oven, carrier, keeper, meter and read table, described carrier is placed horizontally in described constant temperature oven, described carrier has the positioning area for assignment test part, described keeper and meter lay respectively at one of them limit of described positioning area, it is outside and be electrically connected with described meter that described read table is located at constant temperature oven, and described meter has a table body and can the measurement dish that slides of phase his-and-hers watches body.
2. the measuring and calculating device of coefficient of linear thermal expansion according to claim 1, it is characterized in that: described keeper is positioned at the middle part of carrier, described meter is located at the outside of carrier.
3. the measuring and calculating device of coefficient of linear thermal expansion according to claim 1, is characterized in that: described carrier comprises at least two sidewalls, and described positioning area is surrounded by described sidewall and described keeper and formed.
4. the measuring and calculating device of coefficient of linear thermal expansion according to claim 3, is characterized in that: described meter is positioned at the outside of one of them sidewall, described measurement dish puts in carrier through one of them sidewall described.
5. the measuring and calculating device of coefficient of linear thermal expansion according to claim 3, is characterized in that: described keeper is made up of a registration bolt.
6. the measuring and calculating device of coefficient of linear thermal expansion according to claim 3, is characterized in that: described keeper is made up of two registration bolts, and described two registration bolts are that vertical angle is arranged.
7. the measuring and calculating device of coefficient of linear thermal expansion according to claim 1, is characterized in that: described meter is digital display dial gauge, and described carrier is corrosion resistant plate.
8. a measuring method for coefficient of linear thermal expansion, is characterized in that: comprise the steps,
The measuring and calculating device of the coefficient of linear thermal expansion according to any one of claim 1-7 is provided;
Carrier and test block are placed in constant temperature oven, make test block be positioned at positioning area, and it at least wherein contacts with the measurement dish of meter with keeper on both sides respectively;
The temperature of constant temperature oven is remained on T1, utilizes the change in size of read table observation test part, after the stable reading of read table, record detection data, be designated as L1;
The temperature of constant temperature oven is risen to T2 and constant temperature, after the stable reading of read table, records detection data, be designated as L2;
Calculate coefficient of linear thermal expansion=(L2-L1)/(L1 × Δ T), Δ T is temperature change value T2-T1.
9. the measuring method of coefficient of linear thermal expansion according to claim 8, is characterized in that: the coefficient of linear thermal expansion of described test block is the mean value of the multiple result of calculations utilizing said method to draw.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210236676.1A CN103543172B (en) | 2012-07-09 | 2012-07-09 | A kind of measuring and calculating device of coefficient of linear thermal expansion and measuring method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210236676.1A CN103543172B (en) | 2012-07-09 | 2012-07-09 | A kind of measuring and calculating device of coefficient of linear thermal expansion and measuring method |
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| CN103543172A CN103543172A (en) | 2014-01-29 |
| CN103543172B true CN103543172B (en) | 2016-02-24 |
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| CN114111674A (en) * | 2021-11-23 | 2022-03-01 | 中国航发哈尔滨轴承有限公司 | Measuring method for identifying size change of 8Cr4Mo4V steel bearing material |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU830216A1 (en) * | 1979-07-20 | 1981-05-15 | Минский Филиал Всесоюзного Научно- Исследовательского И Проектно-Koh-Структорского Института По Автомати-Зации Предприятий Промышленностистроительных Материалов | Dilatometer |
| CN2660523Y (en) * | 2003-12-12 | 2004-12-01 | 北京交通大学 | Low dimensional material thermal expansion coefficient measurer |
| CN201548502U (en) * | 2009-11-30 | 2010-08-11 | 河海大学 | Solid linear expansion coefficient measurement device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004279074A (en) * | 2003-03-13 | 2004-10-07 | Shimadzu Corp | Apparatus for thermomechanical analysis |
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2012
- 2012-07-09 CN CN201210236676.1A patent/CN103543172B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU830216A1 (en) * | 1979-07-20 | 1981-05-15 | Минский Филиал Всесоюзного Научно- Исследовательского И Проектно-Koh-Структорского Института По Автомати-Зации Предприятий Промышленностистроительных Материалов | Dilatometer |
| CN2660523Y (en) * | 2003-12-12 | 2004-12-01 | 北京交通大学 | Low dimensional material thermal expansion coefficient measurer |
| CN201548502U (en) * | 2009-11-30 | 2010-08-11 | 河海大学 | Solid linear expansion coefficient measurement device |
Non-Patent Citations (1)
| Title |
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| 简易测量柔性材料线胀系数的方法;叶慧群;《物理实验》;20110430;第31卷(第4期);28-30 * |
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