CN102116750A - Device for measuring specific heat capacity of product - Google Patents
Device for measuring specific heat capacity of product Download PDFInfo
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- CN102116750A CN102116750A CN 201110030774 CN201110030774A CN102116750A CN 102116750 A CN102116750 A CN 102116750A CN 201110030774 CN201110030774 CN 201110030774 CN 201110030774 A CN201110030774 A CN 201110030774A CN 102116750 A CN102116750 A CN 102116750A
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- water
- temperature
- baking oven
- measuring
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Abstract
The invention discloses a device for measuring specific heat capacity of a product. The device comprises a measuring drying oven (1), a water container (2), medium water (21), a first temperature sensor (3), a second temperature sensor (4), a preheating drying oven (6), a heat-insulating valve (7) and a connecting passage (8), wherein the water container in which the medium water is filled is arranged in the measuring drying box; the first temperature sensor is arranged in the water container for detecting water temperature of the medium water; the second temperature sensor is arranged in the measuring drying box for detecting air temperature in the measuring drying box; the air temperature in the measuring drying box changes with change of the water temperature of the medium water through automatic control; the preheating drying box is arranged above the measuring drying box, and the connecting passage with the heat-insulating valve is arranged below the preheating drying box and above the measuring drying box, so that heat loss in a specific heat capacity measuring process is reduced to the greatest extent. Thus, the product is not required to be made into a standard sample block during the measurement of the specific heat capacity; and the aim of measuring the specific heat capacity of the finished product of manufacturing enterprises is fulfilled.
Description
Technical field
The present invention relates to a kind of device of measuring the object specific heat capacity, be meant that specifically manufacturing enterprise is used for manufactured goods are carried out a kind of device of measuring the goods specific heat capacity of whole specific heat capacity test.
Background technology
The specific heat capacity of prior art test object, elder generation's cutting sampling on testee is made the sample piece of standard specification, again the sample piece is placed the heated at constant temperature baking oven preheated one-section time, make the equilibrium of sample piece internal and external temperature reach standard preheat temperature value, then the sample piece after the preheating is transferred in the reference fluid water that quality is determined, temperature is determined, measure the temperature rise number of degrees of WATER AS FLOW MEDIUM water temperature, ask and calculate the heat that WATER AS FLOW MEDIUM obtains, and then ask the specific heat capacity of calculating the detected sample piece.
The method of prior art test object specific heat capacity runs into following problem when being applied to manufacturing enterprise: manufacturing enterprise need carry out whole specific heat capacity test to the manufactured goods object, for example, the contact of device for switching, the element that bimetallic strip is made, these manufactured goods objects are not to be made of same substance, and can not take a sample and make the sample piece of standard specification, in addition, if measured object is thicker, it is longer that the measured object internal heat is delivered in the WATER AS FLOW MEDIUM needed heat balance time, and the time is long more, the temperature rise heat of WATER AS FLOW MEDIUM is just big more by the heat waste that air distributes, thereby has reduced the precision that detects data; If measured object is book too, then in measured object was transferred to process the WATER AS FLOW MEDIUM from constant temperature oven, measured object can reduce the precision that detects data equally by the large percentage of air dissipated heat.Because the heat waste of measured object and WATER AS FLOW MEDIUM heat transferred ambient air in the mensuration process is big and can not ignore, cause the specific heat capacity of goods to measure the precision reduction, therefore, prior art exists incompatibility manufacturing enterprise the manufactured goods object to be carried out the problems and shortcomings of whole specific heat capacity test.
Summary of the invention
Problems and shortcomings at above-mentioned prior art existence, the present invention adopts the water receptacle that will fill WATER AS FLOW MEDIUM to place and measures baking oven, first temperature sensor is set in water receptacle detects the WATER AS FLOW MEDIUM water temperature, second temperature sensor is set in measuring baking oven comes temperature in the detection assay baking oven, the water temperature that makes the temperature of measuring in the baking oven follow WATER AS FLOW MEDIUM by automatic control changes; In addition, preheating oven is arranged on the top of measuring baking oven, below the inside of preheating oven with above the inside of measuring baking oven an interface channel is being set, the lower end of interface channel is facing to measuring the suitable for reading of the interior water receptacle of baking oven, interface channel is provided with a temperature that is used for isolating preheating oven and the measures baking oven technical scheme of the heat insulation valve of mutual interference mutually in the position of the inside of preheating oven, a kind of device of measuring the goods specific heat capacity is provided, be intended to by reducing the heat waste of measured object and WATER AS FLOW MEDIUM heat transferred ambient air in specific heat capacity mensuration process after the preheating to greatest extent, make the mensuration of specific heat capacity need not to make standard sample, reach adaptation manufacturing enterprise the manufactured goods object is carried out the purpose that whole specific heat capacity is measured.
The object of the present invention is achieved like this: a kind of device of measuring the goods specific heat capacity, comprise and measure baking oven, water receptacle, WATER AS FLOW MEDIUM, first temperature sensor, second temperature sensor, preheating oven, heat insulation valve, interface channel, wherein: described mensuration baking oven is by microprocessor control, possesses the Electric heat oven of temperature automatically controlled, demonstration, memory function; Measure first temperature sensor and second temperature sensor of NTC thermo-sensitive resistor and two temperature sensors that are connected with the microprocessor of measuring baking oven by heat-resisting wire that are provided with the NTC thermo-sensitive resistor in the baking oven; Wherein, first temperature sensor is used to detect the water temperature of the described WATER AS FLOW MEDIUM of feedback, and second temperature sensor is used for detecting the air themperature that feedback is measured baking oven, and places the inner space of measuring baking oven;
Described water receptacle is a glass beaker, fills WATER AS FLOW MEDIUM in the water receptacle, and WATER AS FLOW MEDIUM is a pure water;
Water receptacle is being contained WATER AS FLOW MEDIUM and is being placed described mensuration baking oven; Described first temperature sensor places the WATER AS FLOW MEDIUM of water receptacle;
Described preheating oven is the electric heating constant temperature baking oven that is used for the preheating measured object; Preheating oven is arranged on the top of described mensuration baking oven, the top of the below of the inside of preheating oven and the inside of measuring baking oven be provided with one in outside heat insulation interface channel, the lower end of interface channel is facing to measuring the suitable for reading of water receptacle in the baking oven, and interface channel is provided with a temperature that is used for isolating preheating oven and the mensuration baking oven heat insulation valve of mutual interference mutually in the position of the inside of preheating oven.
Workflow
Simultaneously, measure first temperature sensor in the baking oven and second temperature sensor and measure temperature in the baking oven and follow the water temperature of WATER AS FLOW MEDIUM and change, measure promptly that temperature in the baking oven follows that the water temperature of WATER AS FLOW MEDIUM raises and rising and being consistent by the microprocessor control of automaticallying switch;
Enter difference between the temperature value that measured object and WATER AS FLOW MEDIUM after the temperature value of the WATER AS FLOW MEDIUM of moment before the WATER AS FLOW MEDIUM and the preheating reach the WATER AS FLOW MEDIUM after the thermal equilibrium by first temperature sensor recording medium water measured object after preheating, be the temperature rise value of the WATER AS FLOW MEDIUM water temperature before and after measured object and the WATER AS FLOW MEDIUM thermal equilibrium after the preheating, just can ask the specific heat capacity of calculating measured object;
If: the specific heat capacity of measured object is C
3
Known: the weight of measured object is M
3The specific heat capacity of WATER AS FLOW MEDIUM is C
1, weight is M
1The specific heat capacity of glass beaker is C
2, weight is M
2
Record: the temperature rise value of WATER AS FLOW MEDIUM water is Δ t
1The temperature reduction value of measured object is Δ t
2
Relational expression is then arranged:
(C
1·M
1+C
2·M
2)·Δt
1＝C
3·M
3·Δt
2；
So specific heat capacity C of measured object
3=(C
1M
1+ C
2M
2) Δ t
1/ (M
3Δ t
2).
Principle of work
In step 2, measuring first temperature sensor in the baking oven and second temperature sensor controls the temperature of measuring in the baking oven automatically by microprocessor and follows the water temperature of WATER AS FLOW MEDIUM and change, and follow and be consistent, according to the second law of thermodynamics, when equating, two object temperatures do not have the transmission of heat; Because the temperature in the mensuration baking oven is followed WATER AS FLOW MEDIUM water temperature rising variation and is consistent, air is not lost towards periphery for heat in the WATER AS FLOW MEDIUM, the temperature rise that has guaranteed WATER AS FLOW MEDIUM to absorb liberated heat when the measured object temperature reduces after the preheating and obtained does not have heat waste, measured object and WATER AS FLOW MEDIUM have been solved after the minimizing preheating in reaching thermally equilibrated process, especially thermally equilibrated process time is longer, the heat waste problem of heat transferred ambient air; Simultaneously, be limited enclosure space owing to measure baking oven, the water temperature that the temperature in measuring baking oven is followed WATER AS FLOW MEDIUM changes and measures that air humidity is in state of saturation in the baking oven when changing, and therefore, WATER AS FLOW MEDIUM is few because of the mass loss of evaporation, can ignore;
Preheating oven is arranged on the top of measuring baking oven and heat insulation valve and interface channel are set, avoided shifting the heat waste of measured object after the preheating, solved the heat waste problem that reduces heat transferred ambient air in the process that measured object after the preheating is transferred to WATER AS FLOW MEDIUM by instrument;
Because three temperature values, it is the water temperature after initial temperature, the initial temperature of measured object, the heat interchange of WATER AS FLOW MEDIUM finished, all be under the steady temperature situation, to read, thereby avoided making the problem of test findings generation error to occur because of laboratory technician's self diathesis is not high.
Above-mentioned, the present invention adopts the water receptacle that will fill WATER AS FLOW MEDIUM to place and measures baking oven, first temperature sensor is set in water receptacle detects the WATER AS FLOW MEDIUM water temperature, second temperature sensor is set in measuring baking oven comes temperature in the detection assay baking oven, the water temperature that makes the temperature of measuring in the baking oven follow WATER AS FLOW MEDIUM by automatic control changes; In addition, preheating oven is arranged on the top of measuring baking oven, below the inside of preheating oven with above the inside of measuring baking oven an interface channel is being set, the lower end of interface channel is facing to measuring the suitable for reading of the interior water receptacle of baking oven, interface channel is provided with a temperature that is used for isolating preheating oven and the measures baking oven technical scheme of the heat insulation valve of mutual interference mutually in the position of the inside of preheating oven, overcome prior art and had incompatible problems and shortcomings of the manufactured goods object being carried out whole specific heat capacity test, a kind of device of measuring the goods specific heat capacity that is provided, by reducing the heat waste of measured object and WATER AS FLOW MEDIUM heat transferred ambient air in specific heat capacity mensuration process after the preheating to greatest extent, make the mensuration of specific heat capacity need not to make standard sample, reached adaptation manufacturing enterprise the manufactured goods object is carried out the purpose that whole specific heat capacity is measured.
Description of drawings
Fig. 1 is a kind of theory structure synoptic diagram of measuring the device of goods specific heat capacity of the present invention.
Below in conjunction with the embodiment in the accompanying drawing the present invention is described in further detail, but should not be construed as any limitation of the invention.
Among the figure: measure baking oven 1, water receptacle 2, WATER AS FLOW MEDIUM 21, first temperature sensor 3, second temperature sensor 4, measured object 5, preheating oven 6, heat insulation valve 7, interface channel 8.
Embodiment
Consult Fig. 1, a kind of device of measuring the goods specific heat capacity of the present invention, comprise and measure baking oven 1, water receptacle 2, WATER AS FLOW MEDIUM 21, first temperature sensor 3, second temperature sensor 4, preheating oven 6, heat insulation valve 7, interface channel 8, wherein: described mensuration baking oven 1 is by microprocessor control, possesses the Electric heat oven of temperature automatically controlled, demonstration, memory function; Measure first temperature sensor 3 and second temperature sensor 4 of NTC thermo-sensitive resistor and two temperature sensors that are connected with the microprocessor of measuring baking oven 1 by heat-resisting wire that are provided with the NTC thermo-sensitive resistor in the baking oven 1; Wherein, first temperature sensor 3 is used to detect the water temperature of the described WATER AS FLOW MEDIUM 21 of feedback, and second temperature sensor 4 is used for detecting the air themperature that feedback is measured baking oven 1, and places the inner space of measuring baking oven 1;
Described water receptacle 2 is a glass beaker, fills WATER AS FLOW MEDIUM 21 in the water receptacle 2, and WATER AS FLOW MEDIUM 21 is a pure water;
Described preheating oven 6 is for being used for the electric heating constant temperature baking oven of preheating measured object 5; Preheating oven 6 is arranged on the top of described mensuration baking oven 1, the top of the below of the inside of preheating oven 6 and the inside of measuring baking oven 1 be provided with one in outside heat insulation interface channel 8, the lower end of interface channel 8 is facing to measuring the suitable for reading of water receptacle 2 in the baking oven 1, and interface channel 8 is provided with a temperature that is used for isolating preheating oven 6 and the mensuration baking oven 1 heat insulation valve 7 of mutual interference mutually in the position of the inside of preheating oven 6.
Workflow
Simultaneously, measure first temperature sensor 3 in the baking oven 1 and second temperature sensor 4 and measure temperature in the baking oven 1 and follow the water temperature of WATER AS FLOW MEDIUM 21 and change, measure promptly that temperature in the baking oven 1 follows that the water temperature of WATER AS FLOW MEDIUM 21 raises and rising and being consistent by the microprocessor control of automaticallying switch;
Enter difference between the temperature value that measured object 5 and WATER AS FLOW MEDIUM 21 after the temperature value of the WATER AS FLOW MEDIUM 21 of moment before the WATER AS FLOW MEDIUM 21 and the preheating reach the WATER AS FLOW MEDIUM 21 after the thermal equilibrium by first temperature sensor, 3 recording medium water 21 measured object 5 after preheating, be the temperature rise value of WATER AS FLOW MEDIUM 21 water temperatures before and after measured object 5 and WATER AS FLOW MEDIUM 21 thermal equilibriums after the preheating, just can ask the specific heat capacity of calculating measured object 5;
If: the specific heat capacity of measured object 5 is C
3
Known: the weight of measured object 5 is M
3The specific heat capacity of WATER AS FLOW MEDIUM 21 is C
1, weight is M
1The specific heat capacity of glass beaker is C
2, weight is M
2
Record: the temperature rise value of WATER AS FLOW MEDIUM 21 water is Δ t
1The temperature reduction value of measured object 5 is Δ t
2
Relational expression is then arranged:
(C
1·M
1+C
2·M
2)·Δt
1＝C
3·M
3·Δt
2；
So specific heat capacity C of measured object 5
3=(C
1M
1+ C
2M
2) Δ t
1/ (M
3Δ t
2).
Principle of work
In step 2, measuring first temperature sensor 3 in the baking oven 1 and second temperature sensor 4 controls the temperature of measuring in the baking oven 1 automatically by microprocessor and follows the water temperature of WATER AS FLOW MEDIUM 21 and change, and follow and be consistent, according to the second law of thermodynamics, when equating, two object temperatures do not have the transmission of heat; Because the temperature in the mensuration baking oven 1 is followed WATER AS FLOW MEDIUM 21 water temperatures rising variation and is consistent, air is not lost towards periphery for heat in the WATER AS FLOW MEDIUM 21, the temperature rise that has guaranteed WATER AS FLOW MEDIUM 21 to absorb liberated heat when measured object 5 temperature reduce after the preheatings and obtained does not have heat waste, measured object 5 and WATER AS FLOW MEDIUM 21 have been solved after the minimizing preheating in reaching thermally equilibrated process, especially thermally equilibrated process time is longer, the heat waste problem of heat transferred ambient air; Simultaneously, because measuring baking oven 1 be limited enclosure space, the water temperature that the temperature in measuring baking oven 1 is followed WATER AS FLOW MEDIUM 21 change and when changing in the mensuration baking oven 1 air humidity be in state of saturation, therefore, WATER AS FLOW MEDIUM 21 is few because of the mass loss of evaporation, can ignore;
Preheating oven 6 is arranged on the top of measuring baking oven 1 and heat insulation valve 7 and interface channel 8 are set, avoided shifting the heat waste of measured object 5 after the preheating, solved the heat waste problem that reduces heat transferred ambient air in the process that measured object 5 after the preheating is transferred to WATER AS FLOW MEDIUM 21 by instrument;
Because three temperature values, it is the water temperature after initial temperature, the initial temperature of measured object 5, the heat interchange of WATER AS FLOW MEDIUM 21 finished, all be under the steady temperature situation, to read, thereby avoided making the problem of test findings generation error to occur because of laboratory technician's self diathesis is not high.
Claims (1)
1. device of measuring the goods specific heat capacity, it is characterized in that: comprise and measure baking oven (1), water receptacle (2), WATER AS FLOW MEDIUM (21), first temperature sensor (3), second temperature sensor (4), preheating oven (6), heat insulation valve (7), interface channel (8), wherein: described mensuration baking oven (1) is by microprocessor control, possesses the Electric heat oven of temperature automatically controlled, demonstration, memory function; Measure first temperature sensor (3) and second temperature sensor (4) of NTC thermo-sensitive resistor and two temperature sensors that are connected with the microprocessor of measuring baking oven (1) by heat-resisting wire that are provided with the NTC thermo-sensitive resistor in the baking oven (1); Wherein, first temperature sensor (3) is used for detecting the water temperature of the described WATER AS FLOW MEDIUM of feedback (21), and second temperature sensor (4) is used for detecting the air themperature that feedback is measured baking oven (1), and places the inner space of measuring baking oven (1);
Described water receptacle (2) is a glass beaker, fills WATER AS FLOW MEDIUM (21) in the water receptacle (2), and WATER AS FLOW MEDIUM (21) is a pure water; Water receptacle 2 is being contained WATER AS FLOW MEDIUM (21) and is being placed described mensuration baking oven (1);
Described first temperature sensor (3) places the WATER AS FLOW MEDIUM (21) of water receptacle (2);
Described preheating oven (6) is for being used for the electric heating constant temperature baking oven of preheating measured object (5); Preheating oven (6) is arranged on the top of described mensuration baking oven (1), the top of the below of the inside of preheating oven (6) and the inside of measuring baking oven (1) be provided with one in outside heat insulation interface channel (8), the lower end of interface channel (8) is facing to measuring the suitable for reading of water receptacle (2) in the baking oven (1), and interface channel (8) is provided with a temperature that is used for isolating preheating oven (6) and mensuration baking oven (1) the heat insulation valve (7) of mutual interference mutually in the position of the inside of preheating oven (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110030774 CN102116750B (en) | 2011-01-21 | 2011-01-21 | Device for measuring specific heat capacity of product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110030774 CN102116750B (en) | 2011-01-21 | 2011-01-21 | Device for measuring specific heat capacity of product |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102116750A true CN102116750A (en) | 2011-07-06 |
| CN102116750B CN102116750B (en) | 2013-03-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110030774 Expired - Fee Related CN102116750B (en) | 2011-01-21 | 2011-01-21 | Device for measuring specific heat capacity of product |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102116750B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105699420A (en) * | 2016-03-01 | 2016-06-22 | 内蒙古科技大学 | Heat insulation type solid specific heat capacity measuring device and method |
| CN107621479A (en) * | 2017-10-30 | 2018-01-23 | 长安大学 | A kind of rock specific heat capacity measure device and assay method |
| CN108022660A (en) * | 2017-12-07 | 2018-05-11 | 中国核动力研究设计院 | The heat loss measuring device and its method of a kind of system Experiment of Thermophysics device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2852122Y (en) * | 2005-06-27 | 2006-12-27 | 郑志荣 | Apparatus for measuring metal specific heat capacity by cooling method |
| WO2009057851A1 (en) * | 2007-10-29 | 2009-05-07 | Korea Research Institute Of Standards And Science | Apparatus and method for measuring specific heat of tri-state material using supersonic waves |
| DE102008012758A1 (en) * | 2008-02-29 | 2009-11-12 | Poeßnecker, Wolfgang, Dr. rer. nat. Dr.-Ing. | Device for simultaneous absolute determination of specific thermal capacity, heat conductivity, thermal diffusivity of fixed cylindrical probe, has tempering surrounding oven in which cylindrical probe to be measured is placed |
| CN101639455A (en) * | 2009-09-04 | 2010-02-03 | 陈清华 | Method and system for testing thermo-physical property of loose coals |
| CN201945569U (en) * | 2011-01-21 | 2011-08-24 | 宁波双林汽车部件股份有限公司 | Device for measuring specific heat capacity of products |
-
2011
- 2011-01-21 CN CN 201110030774 patent/CN102116750B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2852122Y (en) * | 2005-06-27 | 2006-12-27 | 郑志荣 | Apparatus for measuring metal specific heat capacity by cooling method |
| WO2009057851A1 (en) * | 2007-10-29 | 2009-05-07 | Korea Research Institute Of Standards And Science | Apparatus and method for measuring specific heat of tri-state material using supersonic waves |
| DE102008012758A1 (en) * | 2008-02-29 | 2009-11-12 | Poeßnecker, Wolfgang, Dr. rer. nat. Dr.-Ing. | Device for simultaneous absolute determination of specific thermal capacity, heat conductivity, thermal diffusivity of fixed cylindrical probe, has tempering surrounding oven in which cylindrical probe to be measured is placed |
| CN101639455A (en) * | 2009-09-04 | 2010-02-03 | 陈清华 | Method and system for testing thermo-physical property of loose coals |
| CN201945569U (en) * | 2011-01-21 | 2011-08-24 | 宁波双林汽车部件股份有限公司 | Device for measuring specific heat capacity of products |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105699420A (en) * | 2016-03-01 | 2016-06-22 | 内蒙古科技大学 | Heat insulation type solid specific heat capacity measuring device and method |
| CN105699420B (en) * | 2016-03-01 | 2018-02-27 | 内蒙古科技大学 | A kind of heat-insulating specific heat of solid and heat measurement apparatus and method |
| CN107621479A (en) * | 2017-10-30 | 2018-01-23 | 长安大学 | A kind of rock specific heat capacity measure device and assay method |
| CN108022660A (en) * | 2017-12-07 | 2018-05-11 | 中国核动力研究设计院 | The heat loss measuring device and its method of a kind of system Experiment of Thermophysics device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102116750B (en) | 2013-03-27 |
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