CN202057621U - Device for measuring heat storage coefficients of materials with harmonic wave method based on independent sensor - Google Patents
Device for measuring heat storage coefficients of materials with harmonic wave method based on independent sensor Download PDFInfo
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- CN202057621U CN202057621U CN2011201720590U CN201120172059U CN202057621U CN 202057621 U CN202057621 U CN 202057621U CN 2011201720590 U CN2011201720590 U CN 2011201720590U CN 201120172059 U CN201120172059 U CN 201120172059U CN 202057621 U CN202057621 U CN 202057621U
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Abstract
The utility model provides a device for measuring heat storage coefficients of materials with a harmonic wave method based on an independent sensor, and the device relates to the heat storage material testing technology. A sample to be measured is arranged in a sample storage tank. When the independent sensor measures liquid/powder samples, the independent sensor is vertically put in the liquid/powder. When the independent sensor measures solid samples, the independent sensor is positioned between two identical samples to be measured to form a sandwich type structure and is put on the bottom surface of the sample storage tank in parallel. The lead end of the independent sensor is electrically connected with a lead rod of the sample storage tank, and the sample storage tank is in a constant-temperature and constant-pressure chamber and is arranged on the bottom surface of the inner chamber. A harmonic wave measuring unit is electrically connected with a lead head of the sample storage tank, and the heat storage coefficient value of the sample to be measured is calculated according to the measuring principle of the harmonic wave method. During testing, the sample storage tank in which the sample to be measured and the independent sensor are fixed in relative positions is arranged in the constant-temperature and constant-pressure chamber. After the temperature and pressure reach the set values, the fundamental voltage and the third harmonic voltage at the two ends of the independent sensor are measured, and the relationship of temperature rise and current frequency of the independent sensor is calculated.
Description
Technical field
The utility model relates to heat-storing material heat storage coefficient technical field of measurement and test, be that a kind of harmonic wave method based on the self sensor is measured material heat storage coefficient device, be applied to heat-storing material heat storage coefficient non-destructive testings such as porosu solid, composite phase-change material and nanometer powder.
Background technology
Heat storage coefficient is as the parameter of an evaluating material and its surrounding medium heat exchange speed, it measured accurately receive a lot of concerns all the time.Especially along with the increasing of the novel heat-storing material of various forms, extremely useful for probing into its potential application to the evaluation of these new material heat storage performances.Recent two decades grows up and is considered to measure a kind of effective means of solid and film thermal physical property parameter (thermal conductivity, thermal diffusivity and heat storage coefficient) based on 3 ω technology of harmonic wave detection always.During with the heat storage coefficient of 3 ω commercial measurement materials, the planar shaped metal sensor that need have certain size and shape in the detected materials surface preparation, this micro metal sensor simultaneously as well heater and temperature sensor, is tried to achieve the heat storage coefficient of detected materials then according to the relation of heat wave frequency and temperature variation.Analyzing these method of testing characteristics finds, this method can not realize the Non-Destructive Testing of solid sample, and need repeat single sample is carried out the preparation of dielectric film (when measuring conductive solid) and planar shaped metal sensor, so the implementing process complexity, cost price is also higher.In addition, unless earlier the planar shaped metal sensor is prepared on a standard material, otherwise this method can't be used for measuring the heat storage coefficient of liquid and dusty material, but thereby the adding of this standard material will cause heat to distribute the uneven great measuring error that causes in planar shaped metal sensor both sides.In order to address the above problem, we adopt the self sensor to realize the measurement of heat storage coefficient.Described self sensor is meant the sensor with following feature: finish to separate with it after test process, test are finished with testing sample contact during test and can deposit separately and use repeatedly.We have the following advantages by the employed self sensor that is exclusively used in the test of material heat storage coefficient: at first, self sensor upper strata is flexible coverlay, bottom is a flexible substrate, and flexible substrate and flexible coverlay itself are exactly dielectric film, can realize the measurement of conducting sample heat storage coefficient, also omit the operation of preparation insulation course on conducting sample in advance; Secondly, flexible substrate and flexible coverlay have protective effect to the planar shaped metal sensor, and the self sensor of formation has certain mechanical strength, can reuse, and this has just omitted the operation of preparation planar shaped metal sensor on testing sample again; Moreover the self sensor has been realized the measurement of liquid and dusty material heat storage coefficient and can have been guaranteed high measuring accuracy.
The utility model content
The utility model purpose is to solve the existing 3 ω measuring techniques of surveying based on harmonic wave need repeat to prepare planar shaped metal sensor, insulation difficulty and can't accurately characterize technological deficiencies such as liquid and powdered sample when the test material heat storage coefficient, for this reason, the utility model provides a kind of harmonic wave method based on the self sensor to measure material heat storage coefficient device, planar shaped metal sensor and testing sample insulation can be reused, be guaranteed to its self sensor, can be used for heat-storing material heat storage coefficient non-destructive testings such as porosu solid, composite phase-change material and nanometer powder.
For reaching described purpose, technical solution of the present utility model is:
A kind of harmonic wave method based on the self sensor is measured material heat storage coefficient device, comprises the constant temperature and pressure chamber, and the constant temperature and pressure chamber is a seal, the surface is a metal shell, outer casing inner wall is connected with heat-insulation layer, is inner chamber in the heat-insulation layer, and metal shell is provided with the door or the lid of sealing; It also comprises: self sensor, sample storage tank, temperature and pressure regulating system, harmonic measurement unit, wherein:
The temperature and pressure regulating system comprises temperature and pressure sensor, temperature and pressure controller, gas handling system, TEC heating/cooling device, its temperature and pressure sensor is suspended in the inner chamber, gas handling system output interlinks with bore seal, and the TEC heating/cooling device places in the heat-insulation layer in constant temperature and pressure chamber; Temperature sensor, TEC heating/cooling device are electrically connected with temperature controller outside the constant temperature and pressure chamber, and pressure transducer, gas handling system are electrically connected with pressure controller outside the constant temperature and pressure chamber;
The sample storage tank is placed in the inner chamber of constant temperature and pressure chamber, and places on the bottom surface of inner chamber, and sample storage tank upper end connects and is provided with lead wire lever;
The self sensor is arranged in the sample storage tank, the lead end of self sensor is electrically connected with the lead wire lever of sample storage tank upper end is inner, the lead riser of sample storage tank lead wire lever outer end is electrically connected with harmonic measurement unit outside the constant temperature and pressure chamber through lead, harmonic measurement unit is measured the fundamental voltage and the third harmonic voltage at self sensor two ends with the harmonic wave method, and calculates the temperature rise of self sensor and the relation of power frequency;
Harmonic measurement unit is located in the main control system;
During measurement, testing sample places the sample storage tank, and the self sensor places testing sample.
Described measurement material heat storage coefficient device, its described self sensor comprises: substrate, planar shaped metal sensor, coverlay and four lead-in wire parts; The planar shaped metal sensor is fixed in the flexible substrate upper surface by the end to end plain cloth of wide S shape conductive metal band, constitutes a paliform plane; Planar shaped metal sensor one side is electrically connected with four outward extending lead-in wire spares, and four lead-in wire parts are arranged in parallel, and each part outer end that goes between is a lead end, and lead-in wire part, lead end are fixed in the flexible substrate upper surface; The flexible coverlay of affixed one deck above substrate, planar shaped metal sensor, lead-in wire part, four lead ends are exposed to outside the coverlay, form a tabular body with physical strength; The thickness of planar shaped metal sensor, lead-in wire part, lead end is tens micron orders;
The sample storage tank has four lead wire lever, and is corresponding one by one with lead end; The lead end in two outsides is electrically connected with the outer leg bar of sample storage tank is inner respectively, inserts electric current, and the cycle is to the electrical heating of planar shaped metal sensor; The lead end of two centres is electrically connected output voltage with the middle leads bar of sample storage tank is inner respectively in addition.
Described measurement material heat storage coefficient device, its described self sensor places testing sample, and when testing sample was liquid/powdered sample, the self sensor vertically was positioned in liquid/powdered sample; When testing sample is solid sample, get two identical testing samples and be flat on sample storage tank bottom surface, self sensor level is folded between two testing samples, become sandwich style.
Described measurement material heat storage coefficient device, its described conducting metal carrying material is copper or gold; Flexible substrate, flexible coverlay material are polyimide (PI) or polyethylene terephthalate (PET) film.
Described measurement material heat storage coefficient device, its described sample storage tank comprises ladle bowl, cover, and bowl-shape ladle bowl opening makes progress, and the taper cover is positioned at the ladle bowl top, and is suitable with opening; Connect on the cover and be provided with four lead wire lever, the leaded head in lead wire lever outer end, lead wire lever is inner to be electrically connected with the lead end of self sensor, and the lead riser of lead wire lever outer end is electrically connected with harmonic measurement unit outside the constant temperature and pressure chamber through lead.
Described measurement material heat storage coefficient device, its described planar shaped metal sensor thickness is between 12.5～100 μ m, its single conducting metal bandwidth is between 100～500 μ m, and the conductive metal band group width between middle two lead-in wire parts is between 5～25mm, and length is between 10～50mm; The thickness of flexible substrate and flexible coverlay is between 12.5～50 μ m.
Described measurement material heat storage coefficient device, its described lead wire lever material be copper, silver or aluminium one of them.
Described measurement material heat storage coefficient device, it is used for the heat storage coefficient of nondestructive measurement porosu solid, composite phase-change material or nanometer powder heat-storing material.
The utility model is measured the beneficial effect of material heat storage coefficient device based on the harmonic wave method of self sensor:
The 3 ω measuring techniques of surveying based on harmonic wave that the utility model can solve at present to a great extent need repeat the problem for preparing planar shaped metal sensor, insulation difficulty and can't accurately characterize technological deficiencies such as liquid and powdered sample on single sample when the specimen heat storage coefficient, can be directly with the self sensor clip at two sample rooms (solid) or directly place sample (liquid and powder) to test, flexible substrate and flexible coverlay serve as insulation course simultaneously, guarantee the Non-Destructive Testing of non-conductive/conductive solid, liquid and powder.
Flexible substrate and flexible coverlay can guarantee the insulation between planar shaped metal sensor and conducting sample and have certain mechanical strength to guarantee that sensor is not fragile in use.
Flexible substrate and flexible coverlay have elasticity, can reduce the thermal contact resistance at interface greatly when clamping with sample, can test testing sample with the form of plane heat source.
Compare with the 3 ω measuring techniques based on the harmonic wave detection of preparation hundred nanometer thickness planar shaped metal sensors on sample, the utility model no longer needs additionally preparing the planar shaped metal sensor on the testing sample and the thick dielectric film of preparation hundred nano-scale on conducting sample, and manufacture craft is simple, and cost reduces greatly; The Non-Destructive Testing of the non-conductive/conductive solid that utilizes this method to guarantee, liquid and powder.
Description of drawings
Fig. 1 is a self sensor synoptic diagram of the present utility model;
Self transducer arrangements figure when Fig. 2 is the harmonic wave method based on a self sensor of the present utility model measurement device liquid of measuring the material heat storage coefficient/powdered sample;
Fig. 2 a is the harmonic wave method based on the self sensor of the present utility model self transducer arrangements figure when measuring the measurement device solid sample of material heat storage coefficient;
Fig. 3 is the utility model self sensor, testing sample, sample storage tank, constant temperature and pressure chamber and temperature and pressure regulating system connection diagram;
Fig. 4 is the structural representation of the utility model harmonic measurement unit.
The main element explanation:
Self sensor 1 comprises:
Planar shaped metal sensor 11, flexible coverlay 12, flexible substrate 13, four 141 to 144 and four lead end 14a to 14d of lead-in wire part;
Testing sample 2;
Sample storage tank 3 comprises: ladle bowl 31, cover 32, four 331 to 334 and four lead riser 33a to 33d of lead wire lever;
Constant temperature and pressure chamber 4 comprises: metal shell 41, heat-insulation layer 42 and inner chamber 43;
Temperature and pressure regulating system 5 comprises: thermopair 51, TEC heating/cooling device 52, temperature controller 53, pressure transducer 54, gas handling system 55 and pressure controller 56;
Embodiment
Describe each related detailed problem in the technical solutions of the utility model in detail below in conjunction with accompanying drawing.Be to be noted that described embodiment only is intended to be convenient to understanding of the present utility model, and it is not played any qualification effect.
A kind of harmonic wave method based on the self sensor of the present utility model is measured material heat storage coefficient device, relate to a self sensor clip the structure of two same solid sample rooms replace with sensor directly be deposited on the sample surfaces, the structure replacement of vertically putting into liquid/powdered sample with a self sensor is deposited on sensor the technical scheme on another standard solid sample surfaces, realized the non-destructive testing to the testing sample heat storage coefficient.To use whether operate as normal of standard ethylene glycol liquid (ethylene glycol analysis pure, purity is 99.99%) verification self sensor before the test.Utilization realizes that based on the device that the harmonic wave method of self sensor is measured the material heat storage coefficient step of this method is as follows: 1. get a certain amount of standard ethylene glycol liquid and be positioned in the sample storage tank 3, to be filled to 1/2 of sample storage tank 3 height is good, self sensor 1 is placed normal fluid, and the position of self sensor 1 should be satisfied planar shaped metal sensor 11 and all is immersed in the normal fluid and four lead end 14a to 14d are positioned at more than the liquid level; 2. four lead end 14a to 14d with self sensor 1 are electrically connected with four lead wire lever 331 to 334 of sample storage tank 3 respectively, and four lead riser 33a to 33d of sample storage tank 3 are electrically connected with the lead end 6a to 6d of harmonic measurement unit 6 respectively; 3. measure fundamental voltage and the third harmonic voltages that the planar shaped metal sensor 11 middle two in the self sensor 1 goes between between the parts 142 and 143 with the harmonic wave method, according to the heat storage coefficient value of harmonic wave method test philosophy match normal fluid; 4. from sample storage tank 3, take off self sensor 1, normal fluid is outwelled the back to be cleaned, oven dry sample storage tank 3, if test is liquid or powdered sample, then with liquid (as distilled water, ethanol) or powder (as the nanoscale silicon oxide powder, the carbon fiber powder) packs in the sample storage tank 3, to be filled to 1/2 of sample storage tank 3 height is good, execution in step 1 fixes new test structure, if test is solid sample (as the stainless steel block, quartz glass block, porous ceramics block), then self sensor 1 is clipped in formation sandwich style test structure between two same solid samples, and with sandwiched type structure and the parallel placement in the bottom surface of sample storage tank 3; 5. the lead end 14a to 14d with self sensor 1 is electrically connected with four lead wire lever 331 to 334 of sample storage tank 3 respectively, sample storage tank 3 is placed constant temperature and pressure chamber 4, and four lead riser 33a to 33d with sample storage tank 3 are electrically connected with the lead end 6a to 6d of harmonic measurement unit 6 respectively again; 6. start-up temperature and pressure regulating system 5 make in the constant temperature and pressure chamber 4 and meet the requirements of temperature and pressure; 7. with the heat storage coefficient of harmonic wave method test testing sample 2, promptly finish test to testing sample 2.Planar shaped metal sensor 11 in the described self sensor 1 adopts faint cycle sinusoidal current heating.During test, adjust the fundamental voltage of described planar shaped metal sensor 11, make third harmonic voltage between two lead end 14b, 14c near 1/10000～1/100000 fundamental voltage.
Please refer to the device of the measurement material heat storage coefficient shown in Fig. 1, Fig. 2, Fig. 2 a, Fig. 3 and Fig. 4, Fig. 3 illustrates this device, contain: self sensor 1, testing sample 2, sample storage tank 3, constant temperature and pressure chamber 4, temperature and pressure regulating system 5, harmonic measurement unit 6, wherein:
Please refer to Fig. 2 illustrates when self sensor 1 is measured liquid/powdered sample and vertically is positioned in the sample storage tank 3 that testing sample 2 is housed; Please refer to Fig. 2 a and illustrate when self sensor 1 is measured solid sample constitute sandwiched type structure between two identical testing samples 2, sandwiched type structure is positioned in the sample storage tank 3, and sandwiched type structure and the parallel placement in the bottom surface of sample storage tank 3; Lead end 14a～the 14d of self sensor 1 is electrically connected with the lead wire lever 331～334 of sample storage tank 3; Have planar shaped metal sensor 11 in the described self sensor 1 with faint cycle sinusoidal current heating, the third harmonic voltage between two harmonic measure lead end 14b, 14c is near 1/100000～1/10000 fundamental voltage; Sample storage tank 3 is placed in the constant temperature and pressure chamber 4, and with the parallel placement in the bottom surface in constant temperature and pressure chamber 4; Harmonic measurement unit 6 is electrically connected with the lead riser 33a～33d of sample storage tank 3, is used for the harmonic wave method and measures the fundamental voltage and the third harmonic voltage at self sensor 1 two ends and calculate the temperature rise of self sensor 1 and the relation of power frequency.
Self sensor 1 shown in Fig. 1, Fig. 2 and Fig. 2 a comprises: planar shaped metal sensor 11, flexible coverlay 12, flexible substrate 13 and four lead-in wire parts 141～144, planar shaped metal sensor 11 is connected with an end of four lead-in wire parts 141～144 respectively, and the other end of four lead-in wire parts 141～144 has four lead end 14a～14d; Planar shaped metal sensor 11 and four lead-in wire parts 141～144 are between flexible coverlay 12 and flexible substrate 13; Lead end 14b, 14c are connected by lead with two voltage lead bars 332,333 of sample storage tank 3 respectively, and two current feed bars 331,334 in addition of sample storage tank 3 insert in addition two lead end 14a, 14d cycle to 11 electrical heating of planar shaped metal sensor by lead.
Described planar shaped metal sensor 11 and four lead-in wire part 141～144 by conducting metal by the flexible PCB manufacture craft be attached to form on the flexible substrate 13 tens micron orders thick by the end to end paliform planar structure that consists of of wide S shape conductive metal band; With flexible substrate 13 be same material band glue flexible cover film 12 by heat pressing process with form sandwiched type structures based on the planar shaped metal sensor 11 of flexible substrate 13 and four lead-in wire parts 141～144, flexible substrate 13 and flexible coverlay 12 form planar shaped metal sensor 11 with a mechanical strength and the insulating protective layer of four lead-in wire parts 141～144 at the bottom surface of planar shaped metal sensor 11 and four lead-in wire parts 141～144 and end face.
Described conducting metal is copper or gold; Described flexible substrate is polyimide (PI) or polyethylene terephthalate (PET) film.
Based on planar shaped metal sensor 11 thickness on the flexible substrate 13 in 12.5～100 mu m ranges, the single piece of metal bandwidth is in 100～500 mu m ranges, middle two 142,143 of parts of lead-in wire add heating tape group width in 5～25mm scope, length is in 10～50mm scope, and the thickness of flexible substrate 13 and flexible coverlay 12 is in 12.5～50 mu m ranges.
Described sample storage tank 3 comprises: a ladle bowl 31, a cover 32, four lead wire lever 331～334 and four lead riser 33a～33d, and wherein: cover 32 is taper, is positioned at the opening part of ladle bowl 31; Cover 32 tops are provided with four lead wire lever 331～334 successively, embed cover 32 by the hole; Being positioned at four leads that an end of sample storage tank 3 sides draws from lead wire lever 331～334 is electrically connected with the lead end 14a～14d of self metal sensor 1; Lead riser 33a～the 33d of lead wire lever 331～334 other ends is connected with harmonic measurement unit 6.
Please refer to Fig. 3 and illustrate, described lead wire lever 331～334 be copper, silver or aluminium one of them.
The device of described measurement material heat storage coefficient is used for the heat storage coefficient of heat-storing materials such as nondestructive measurement porosu solid, composite phase-change material and nanometer powder.
Fig. 1, Fig. 2, Fig. 2 a, Fig. 3 and Fig. 4 form the device of measuring the material heat storage coefficient based on the harmonic wave method of self sensor; Wherein the self sensor construction is seen Fig. 1; The particular location of self sensor 1 is seen Fig. 2 during test liquid/powdered sample, and the particular location of self sensor 1 is seen Fig. 2 a during the test solid sample; Four lead riser 33b, 33c of the sample storage tank 3 among Fig. 3 and 33a, 33d be harmonic wave detecting voltage lead end 6b, 6c and current feed end 6a, the 6d of the harmonic measurement unit 6 by lead map interlinking 4 respectively.
Self sensor 1 is placed testing sample 2, and to feed angular frequencies for planar shaped metal sensor 11 be the cycle weak current of ω, the heat that produces because of Joule effect will heat planar shaped metal sensor 11, metal sensor outside flexible substrate 13, flexible coverlay 12 and testing sample 2 with the frequency of 2 ω, produce the different temperature wave of frequency, the resistance that causes planar shaped metal sensor 11 increases, and the resistance that planar shaped metal sensor 11 increases is the different voltage harmonic of periodic current acting in conjunction generation frequency of ω with angular frequency.Can determine the heat storage coefficient of detected materials 2 according to the relation of voltage harmonic and vibration frequency.Theoretical model that utilization the utility model proposes and data processing method be the heat storage coefficient of heat-storing materials such as nondestructive measurement porosu solid, composite phase-change material and nanometer powder simultaneously.
The utility model adopts the planar shaped metal sensor 11 of faint cycle sinusoidal current heating based on flexible substrate 13, because of the effective value of planar shaped metal sensor 11 internal currents very little, the heating power that produces has only tens milliwatts, adding thermal flexibility coverlay 12, in the process of flexible substrate 13 and testing sample 2, the temperature rise of planar shaped metal sensor 11 must be less than 1K, the frequency range of the periodic current of Cai Yonging is bigger simultaneously, change to tens Hz from tens mHz, the temperature rise of testing sample 2 is very little under these conditions, lock-in amplifier adopts bigger time constant simultaneously, can be so that heat wave can penetrate flexible coverlay 12 and flexible substrate 13, and then detect testing sample 2.Because the flexible coverlay 12 and the flexible substrate 13 on planar shaped metal sensor 11 surfaces have certain thickness, and very low (the about 0.2Wm of the coefficient of heat conductivity of flexible coverlay 12 and flexible substrate 13
-1K
-1), so the influence of the temperature change of planar shaped metal sensor 11 and flexible layer can not ignore, but can from experimental data, deduct the influence of planar shaped metal sensor 11 and flexible layer.As long as guarantee that heat wave has penetrated flexible coverlay 12 and flexible substrate 13 in measured frequency range, just can obtain the heat storage coefficient information of testing sample 2.The heat storage coefficient scope of the material of the utility model test is than broad, and the solid heat storage coefficient is at 100～10000Js
-0.5M
-2K
-1Between, the uncertainty of measurement of heat storage coefficient is less than ± 5.5%, and liquid/powder heat accumulation coefficient is at 100～2000Js
-0.5M
-2K
-1Between, the uncertainty of measurement of heat storage coefficient is less than ± 4.5%.
Before the test beginning, to whether can operate as normal verify self sensor 1, concrete steps are as follows: (to adopt ethylene glycol to analyze pure more to get a certain amount of normal fluid, purity is 99.99%, at room temperature not volatile and thermal physical property parameter is very stable because of it) be positioned in the sample storage tank 3, to be filled to 1/2 of sample storage tank 3 height is good, self sensor 1 is placed normal fluid, and the position of self sensor 1 should be satisfied planar shaped metal sensor 11 and all is immersed in the normal fluid and four lead end 14a to 14d are positioned at more than the liquid level; Four lead end 14a～14d of self sensor 1 are electrically connected with four lead wire lever 331～334 of sample storage tank 3 respectively, and four lead riser 33a to 33d of sample storage tank 3 are electrically connected with the lead end 6a to 6d of harmonic measurement unit 6 respectively; Measure fundamental voltage and the third harmonic voltages that the planar shaped metal sensor 11 middle two in the independent probe 1 goes between between the parts 142 and 143 with the harmonic wave method, according to the heat storage coefficient value of harmonic wave method test philosophy match normal fluid; Relatively the reference heat storage coefficient value of heat storage coefficient measured value and standard model if both errors think that then self sensor 1 and harmonic measurement unit 6 are working properly within 4.5%, is promptly finished calibration operation; Otherwise to carefully check, determine the reason that causes that measuring error is bigger than normal, whether there is local fracture and can not normally as the planar shaped sensor 11 in: the self sensor 1, whether four lead end 14a to 14d have been positioned at below the liquid level and conducting have taken place, or whether each parts of harmonic measurement unit 6 lost efficacy etc., all working properly up to self sensor 1 and harmonic measurement unit 6.During official testing, if test is that liquid is (as distilled water, ethanol) or powder (as the nanoscale silicon oxide powder, the carbon fiber powder) sample, then liquid or powder are packed in the sample storage tank 3, to be filled to 1/2 of sample storage tank 3 height is good, fix new test structure with same method, if test is that solid sample is (as the stainless steel block, the quartz glass block, the porous ceramics block), then self sensor 1 is clipped in formation sandwich style test structure between two same solid samples, and with sandwiched type structure and the parallel placement in the bottom surface of sample storage tank 3; Lead end 14a to 14d with self sensor 1 is electrically connected with four lead wire lever 331 to 334 of sample storage tank 3 respectively with same method, sample storage tank 3 is placed constant temperature and pressure chamber 4, and four lead riser 33a to 33d with sample storage tank 3 are electrically connected with the lead end 6a to 6d of harmonic measurement unit 6 respectively again; Start-up temperature and pressure regulating system 5 make in the constant temperature and pressure chamber 4 and meet the requirements of temperature and pressure; Regulate the maximum resistance that the adjustable resistance R9 that connects is approaching or may reach greater than measuring process midplane shape metal sensor 11 slightly.In order to prevent that planar shaped metal sensor 11 from having apparent in view temperature rise, the output voltage of conditioning signal generator 65, make the voltage at adjustable resistance R9 two ends near 10mV, fine setting adjustable resistance R9, differential Input Monitor Connector by lock-in amplifier 66, make bridge balance, the resistance R9 of adjustable resistance just equals the cold-state resistance of planar shaped metal sensor 11.Begin test then, select a series of frequency values, fundamental voltage and third harmonic voltage between two lead end 14b, the 14c of measurement respective frequencies value lower plane shape metal sensor 11.Measurement is when the third harmonic of two lead end 14b, the 14c of a certain frequency lower plane shape metal sensor 11, should select rational fundamental voltage, make third harmonic between two lead end 14b, the 14c of planar shaped metal sensor 11 near 1/10000～1/100000 of first-harmonic.
See also the structure that Fig. 4 illustrates the utility model harmonic measurement unit 6, harmonic measurement unit 6 comprises: first operational amplifier 61, second operational amplifier 62, the 3rd operational amplifier 63, prime amplifier 64, signal generator 65, lock-in amplifier 66, system controlled by computer and data acquisition system (DAS) 67, first low temperature floats resistance R 1, second low temperature floats resistance R 2, the 3rd low temperature floats resistance R 3, the 4th low temperature floats resistance R 4, the 5th low temperature floats resistance R 5, the 6th low temperature floats resistance R 6, the 7th low temperature floats resistance R 7, the 8th low temperature floats resistance R 8, adjustable resistance R9, the first current feed end 6a, the second current feed end 6d, the first detecting voltage lead end 6b, the second detecting voltage lead end 6c.
The above; it only is the embodiment in the utility model; but protection domain of the present utility model is not limited thereto; anyly be familiar with the people of this technology in the disclosed technical scope of the utility model; can understand conversion or the replacement expected; all should be encompassed in bag of the present utility model and protect within the scope, therefore, protection domain of the present utility model should be as the criterion with the protection domain of claims.
Claims (8)
1. the harmonic wave method based on the self sensor is measured material heat storage coefficient device, comprises the constant temperature and pressure chamber, and the constant temperature and pressure chamber is a seal, the surface is a metal shell, outer casing inner wall is connected with heat-insulation layer, is inner chamber in the heat-insulation layer, and metal shell is provided with the door or the lid of sealing; It is characterized in that, also comprise: self sensor, sample storage tank, temperature and pressure regulating system, harmonic measurement unit, wherein:
The temperature and pressure regulating system comprises temperature and pressure sensor, temperature and pressure controller, gas handling system, TEC heating/cooling device, its temperature and pressure sensor is suspended in the inner chamber, gas handling system output interlinks with bore seal, and the TEC heating/cooling device places in the heat-insulation layer in constant temperature and pressure chamber; Temperature sensor, TEC heating/cooling device are electrically connected with temperature controller outside the constant temperature and pressure chamber, and pressure transducer, gas handling system are electrically connected with pressure controller outside the constant temperature and pressure chamber;
The sample storage tank is placed in the inner chamber of constant temperature and pressure chamber, and places on the bottom surface of inner chamber, and sample storage tank upper end connects and is provided with lead wire lever;
The self sensor is arranged in the sample storage tank, the lead end of self sensor is electrically connected with the lead wire lever of sample storage tank upper end is inner, the lead riser of sample storage tank lead wire lever outer end is electrically connected with harmonic measurement unit outside the constant temperature and pressure chamber through lead, harmonic measurement unit is measured the fundamental voltage and the third harmonic voltage at self sensor two ends with the harmonic wave method, and calculates the temperature rise of self sensor and the relation of power frequency;
Harmonic measurement unit is located in the main control system;
During measurement, testing sample places the sample storage tank, and the self sensor places testing sample.
2. measurement material heat storage coefficient device as claimed in claim 1 is characterized in that described self sensor comprises: substrate, planar shaped metal sensor, coverlay and four lead-in wire parts; The planar shaped metal sensor is fixed in the flexible substrate upper surface by the end to end plain cloth of wide S shape conductive metal band, constitutes a paliform plane; Planar shaped metal sensor one side is electrically connected with four outward extending lead-in wire spares, and four lead-in wire parts are arranged in parallel, and each part outer end that goes between is a lead end, and lead-in wire part, lead end are fixed in the flexible substrate upper surface; The flexible coverlay of affixed one deck above substrate, planar shaped metal sensor, lead-in wire part, four lead ends are exposed to outside the coverlay, form a tabular body with physical strength; The thickness of planar shaped metal sensor, lead-in wire part, lead end is tens micron orders;
The sample storage tank has four lead wire lever, and is corresponding one by one with lead end; The lead end in two outsides is electrically connected with the outer leg bar of sample storage tank is inner respectively, inserts electric current, and the cycle is to the electrical heating of planar shaped metal sensor; The lead end of two centres is electrically connected output voltage with the middle leads bar of sample storage tank is inner respectively in addition.
3. measurement material heat storage coefficient device as claimed in claim 1 is characterized in that described self sensor places testing sample, and when testing sample was liquid/powdered sample, the self sensor vertically was positioned in liquid/powdered sample; When testing sample is solid sample, get two identical testing samples and be flat on sample storage tank bottom surface, self sensor level is folded between two testing samples, become sandwich style.
4. measurement material heat storage coefficient device as claimed in claim 1 is characterized in that described conducting metal carrying material is copper or gold; Flexible substrate, flexible coverlay material are polyimide or pet film.
5. measurement material heat storage coefficient device as claimed in claim 1 is characterized in that described sample storage tank comprises ladle bowl, cover, and bowl-shape ladle bowl opening makes progress, and the taper cover is positioned at the ladle bowl top, and is suitable with opening; Connect on the cover and be provided with four lead wire lever, the leaded head in lead wire lever outer end, lead wire lever is inner to be electrically connected with the lead end of self sensor, and the lead riser of lead wire lever outer end is electrically connected with harmonic measurement unit outside the constant temperature and pressure chamber through lead.
6. measurement material heat storage coefficient device as claimed in claim 2, it is characterized in that, described planar shaped metal sensor thickness is between 12.5～100 μ m, its single conducting metal bandwidth is between 100～500 μ m, conductive metal band group width between middle two lead-in wire parts is between 5～25mm, and length is between 10～50mm; The thickness of flexible substrate and flexible coverlay is between 12.5～50 μ m.
7. as claim 1,2 or 5 described measurement material heat storage coefficient devices, it is characterized in that, described lead wire lever material be copper, silver or aluminium one of them.
8. as claim 1 or 3 described measurement material heat storage coefficient devices, it is characterized in that, be used for the heat storage coefficient of nondestructive measurement porosu solid, composite phase-change material or nanometer powder heat-storing material.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011201720590U CN202057621U (en) | 2011-05-26 | 2011-05-26 | Device for measuring heat storage coefficients of materials with harmonic wave method based on independent sensor |
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| CN2011201720590U CN202057621U (en) | 2011-05-26 | 2011-05-26 | Device for measuring heat storage coefficients of materials with harmonic wave method based on independent sensor |
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| CN202057621U true CN202057621U (en) | 2011-11-30 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102313758A (en) * | 2011-05-26 | 2012-01-11 | 中国科学院工程热物理研究所 | Device and method for measuring heat storage coefficient of material by harmonic method based on independent sensor |
| CN103852485A (en) * | 2014-03-05 | 2014-06-11 | 中国科学院工程热物理研究所 | Device for testing thermophysical parameters of material by double-helix plane structure harmonic wave method |
| CN112710693A (en) * | 2020-12-10 | 2021-04-27 | 中国电子科技集团公司第五十五研究所 | Device and method for improving 3 omega method film thermal conductivity test precision |
-
2011
- 2011-05-26 CN CN2011201720590U patent/CN202057621U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102313758A (en) * | 2011-05-26 | 2012-01-11 | 中国科学院工程热物理研究所 | Device and method for measuring heat storage coefficient of material by harmonic method based on independent sensor |
| CN103852485A (en) * | 2014-03-05 | 2014-06-11 | 中国科学院工程热物理研究所 | Device for testing thermophysical parameters of material by double-helix plane structure harmonic wave method |
| CN103852485B (en) * | 2014-03-05 | 2016-06-01 | 中国科学院工程热物理研究所 | The device of double spiral plane structure harmonic wave method test material thermal physical property parameter |
| CN112710693A (en) * | 2020-12-10 | 2021-04-27 | 中国电子科技集团公司第五十五研究所 | Device and method for improving 3 omega method film thermal conductivity test precision |
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