CN105699619A - Metal thermal electromotive force measuring instrument - Google Patents
Metal thermal electromotive force measuring instrument Download PDFInfo
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- CN105699619A CN105699619A CN201610109163.2A CN201610109163A CN105699619A CN 105699619 A CN105699619 A CN 105699619A CN 201610109163 A CN201610109163 A CN 201610109163A CN 105699619 A CN105699619 A CN 105699619A
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- 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
- G01N33/20—Metals
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
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- Investigating Or Analyzing Materials Using Thermal Means (AREA)
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Abstract
The invention relates to a metal thermal electromotive force measuring instrument which comprises a temperature control box. A sample table is arranged in the temperature control box. The measurement instrument further comprises a fixing device for fixing a to-be-measured metal sample to the sample table, a measuring device for measuring the to-be-measured metal sample, and a control device for controlling the measuring device. The fixing device and the measuring device are arranged on the sample table. According to the metal thermal electromotive force measuring instrument, the to-be-measured metal sample, the fixing device for fixing the to-be-measured metal sample, the measuring device and the like are arranged in the temperature control box, and the influences of environment temperature changes on measurement can be avoided when the metal sample is measured.
Description
Technical field
The present invention relates to a kind of metal fever electromotive force measuring instrument device。
Background technology
The generation mechanism of metal material thermoelectrical potential is when the two ends of metal material exist a thermograde, owing to the inhomogeneities of temperature causes that the unsymmetry of system electronic is distributed, thus produce an electric potential difference at material two ends。Usually said thermoelectrical potential namely Seebeck (Seebeck) coefficient, its definition is the ratio of electric potential difference △ V and the temperature difference △ T that the two ends of sample are caused by temperature difference △ T, i.e. thermoelectrical potential S=△ V/ △ T。Thermoelectrical potential is only relevant with a material character physical quantity, and only when the fundamental property of the material Shi Caihui that changes itself changes therewith, it doesn't matter and has good linear superposition characteristic with the geometry of material and size。
Used by key equipment in nuclear power plant, metal material is in long service process, and due to the effect of the aging effect such as heat ageing, neutron irradiation, the mechanical property of material can change, as the rising of intensity hardness, plasticity toughness decline。Research finds, the change of metal material mechanics performance is closely related with thermoelectrical potential change, it is possible to by measuring the mechanical property change of the thermoelectrical potential assessment material of material。Compared to the thermoelectrical potential of other thermoelectric material, the thermoelectrical potential of metal material is only small, is typically in a few μ V/K to tens μ V/K, and this just requires to measure more accurate for the thermoelectrical potential of metal material。
The ultimate principle being currently used for the instrument that metal material thermoelectrical potential is measured is by sample on the platform at two controllable temperatures, sets up stable thermograde at sample two ends, measures the electric potential difference at sample two ends, thus obtaining the thermoelectrical potential data of sample。Although these instruments disclosure satisfy that the basic demand of metal fever potential measurement, but have the disadvantages that 1, affected by environment relatively big when measuring metallic materials thermoelectrical potential, the result recorded at varying environment temperature is different；2, the thrust size between measuring probe and sample is relatively big on the impact of thermoelectrical potential testing result, and the result recorded under different thrusts is different, and existing instrument is difficult to accurately control thrust；3, existing instrument when calculating thermoelectrical potential, it reads the temperature sensor of data and voltage sensor not at same measurement point, so that result of calculation is not accurate enough。In order to overcome disadvantages mentioned above, it is necessary to one can either control ambient temperature, thrust and the thermoelectrical potential measurement apparatus that temperature and pressure is measured can be controlled again at same some place。
Summary of the invention
The technical problem to be solved is to overcome the deficiencies in the prior art, it is provided that a kind of metal fever electromotive force measuring instrument device that can control ambient temperature。
For solving above technical problem, the present invention adopts the following technical scheme that:
A kind of metal fever electromotive force measuring instrument device, it includes temperature control box, it is provided with sample stage in described temperature control box, described instrument of measuring also includes the fixing device for being fixed on sample stage by test button to be measured, is used for measuring the measurement apparatus of test button to be measured, is used for control device that described measurement apparatus is controlled, and described fixing device and measurement apparatus are arranged on described sample stage。
Preferably, described measurement apparatus includes the first probe assembly and the second probe assembly that can be arranged on sample stage movably along Y direction, described fixing device includes to be mutually perpendicular to along first bracer that X-direction is slidingly arranged on sample stage and second bracer, described X-axis and Y-axis。
Preferably, described sample stage offering X axis dovetail groove along X-direction, offer Y-axis dovetail groove along Y direction, described fixing device is slidably mounted in X axis dovetail groove, and described measurement apparatus is slidably mounted in Y-axis dovetail groove。
Preferably, the first pillar that the first described probe assembly includes the first probe bearing, be installed on the first probe bearing, the first probe being installed on the first pillar, for the first heating plate to the first described probe heating, be provided with the first elastic component between the first described pillar and the described first probe bearing；The second pillar that the second described probe assembly includes the second probe bearing, be installed on the second probe bearing, the second probe being installed on the second pillar, for the second heating plate to the second described probe heating, be provided with the second elastic component between the second described pillar and the described second probe bearing。
Preferably, described control device include the heating plate temperature controller for controlling the first heating plate and the second heating plate respectively, for measuring the first probe and the temperature measuring set of the second probe temperature respectively。
Preferably, the described device that controls includes for controlling the first probe assembly and the second probe assembly feed mechanism to test button loading force to be measured in the Y-axis direction, described feed mechanism is fixed on described sample stage, described control device also includes a force transducer, described force transducer is arranged at described the first probe assembly, between the second probe assembly and described feed mechanism, for measuring the pressure that the first described probe assembly, the second probe assembly are applied by described feed mechanism。
Preferably, the described device that controls also includes one for measuring the pressure-measuring device of described force transducer pressure signal。
Preferably, first bracer include the first V-block for clamping described test button to be measured, for regulating the first spiral handle of pressure between the first described V-block and described test button to be measured；Second bracer include the second V-block for clamping described test button to be measured, for regulating the second spiral handle of pressure between the second described V-block and described test button to be measured。
Preferably, the described device that controls includes the temperature control box temperature controller for controlling described temperature control the temperature inside the box。
Preferably, the described device that controls also includes for measuring the pressure measuring instrument of voltage difference between the first probe and the second probe respectively。
Employing due to above technical scheme, the present invention compared with prior art have the advantage that metal fever electromotive force measuring instrument device of the present invention by test button to be measured, be used for fixing the fixing device of test button to be measured, measurement apparatus etc. and be arranged in a temperature control box, when test button is measured, it is possible to avoid the impact that measurement is caused by the change of ambient temperature。
Accompanying drawing explanation
Fig. 1 is the theory structure schematic diagram of metal fever electromotive force measuring instrument device of the present invention；
Fig. 2 is the structural representation of probe assembly of the present invention；
Fig. 3 is the structural representation of metal fever electromotive force measuring instrument device of the present invention,
1, temperature control box；2, sample stage；3, X axis dovetail groove；4, Y-axis dovetail groove；5, first bracer；6, second bracer；7, the first probe assembly；8, the second probe assembly；9, force transducer；10, support；11, feed mechanism；12, temperature control box temperature controller；13, pressure-measuring device；14, temperature measuring set；15, pressure measuring instrument；16, heating plate temperature controller；17, computer；18, test button to be measured；71, the first probe；72, the first pillar；73, the first probe bearing；74, the first elastic component；75, the first temperature survey cable；76, the first voltage measurement cable；77, the first heating plate。
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is described in further details。Should be understood that these embodiments are an illustration for the ultimate principle of the present invention, principal character and advantage, and the present invention not scope by following example is limited。The implementation condition adopted in embodiment can do further adjustment according to specific requirement, and not marked implementation condition is generally the condition in normal experiment。
It is illustrated in figure 1 metal fever electromotive force measuring instrument device of the present invention, including temperature control box 1, being provided with sample stage 2 in described temperature control box 1, described instrument of measuring also includes the fixing device for being fixed on sample stage 2 by test button 18 to be measured, is used for measuring the measurement apparatus of test button 18 to be measured, is used for control device that described measurement apparatus is controlled。Temperature control box 1, by Resistant heating, thermocouple temperature measurement, fills insulation material in casing。
Described fixing device includes first bracer 5 and second bracer 6, described measurement apparatus includes the first probe assembly 7 and the second probe assembly 8, described control device include feed mechanism 11, force transducer 9, temperature control box temperature controller 12, pressure-measuring device 13, temperature measuring set 14, pressure measuring instrument 15, heating plate temperature controller 16, for data storage and the computer 17 that processes。
Described sample stage 2 offers X axis dovetail groove 3 along X-direction, offers Y-axis dovetail groove 4 along Y direction, two dovetail groove distributions in T shape。
First bracer 5 and second bracer 6 are slidably disposed in X axis dovetail groove 3, the distance scalable between described first bracer 5 and second bracer 6, to adapt to various sizes of test button to be measured 18。First bracer 5 and second bracer 6 include the V-block for clamping described test button to be measured 18 respectively, for regulating the spiral handle of pressure between described V-block and described test button to be measured 18, described V-block is used for clamping test button 18 to be measured, the pressure between V-block and test button to be measured 18 can be regulated, in order to by the installation and removal of test button 18 to be measured by rotating screw handle。Preferably, first bracer 5 and second bracer 6 adopt polytetrafluoroethylmaterial material to make。
As shown in Figure 2, the first pillar 72 that the first described probe assembly 7 includes the first probe bearing 73, be installed on the first probe bearing 73, the first probe 71 being installed on the first pillar 72, for the first heating plates 77 to the first described probe 71 heating, it is provided with the first elastic component 74 between the first described pillar 72 and the described first probe bearing 73, the first described probe 71 is connected with temperature measuring set 14 by the first temperature survey cable 75, is connected with pressure measuring instrument 15 by the first voltage measurement cable 76。
Second probe assembly 8 is similar to the first probe assembly 7 structure, including the second probe bearing, the second pillar being installed on the second probe bearing, the second probe being installed on the second pillar, for the second heating plate to described second probe heating, be provided with the second elastic component between the second described pillar and the described second probe bearing。The second described probe is connected with temperature measuring set 14 by the second temperature survey cable, is connected with pressure measuring instrument 15 by the second voltage measurement cable。
Preferably, the first described elastic component 74 and the second elastic component are spring, ensure that when the surface irregularity of test button 18 to be measured two probes are in close contact with specimen surface simultaneously。
Feed mechanism 11 is for controlling the first probe assembly 7 and the second probe assembly 8 loading force to test button 18 to be measured in the Y-axis direction, force transducer 9 is used for measuring the first probe 71, second and pops one's head in test button 18 pressure to be measured, and described force transducer 9 is arranged between described first probe assembly the 7, second probe assembly 8 and described feed mechanism 11。Preferably, feed mechanism 11 is hand feeding mechanism, is fixed by screws on sample stage 2 bottom it, and top is connected with support 10 by screw rod, rotate driving arm 10 by screw rod to slide in Y-axis dovetail groove 4, make the first probe 71 and the second probe be pressed in specimen surface with certain thrust。
Heating plate temperature controller 16 is for controlling the first heating plate 77 and the second heating plate temperature respectively, temperature measuring set 14 is for measuring the first probe 71 and the second probe temperature respectively, pressure-measuring device 13 is for measuring described force transducer 9 pressure signal, temperature control box temperature controller 12 is for controlling temperature in described temperature control box 1, and pressure measuring instrument 15 is for measuring voltage difference between the first probe 71 and the second probe respectively。In order to conduct heat better, probe adopts TU1 oxygen-free copper to make。In order to avoid introducing foreign current, pillar adopts politef to make, heating plate Ceramics heating plate。
Described temperature control box temperature controller 12 receives the temperature control box 1 temperature control command that computer 17 transmits, and controls temperature control box 1 temperature and is maintained at setting value。The pressure signal that force transducer 9 records is converted to digital signal and is transferred to computer 17 and shows in real time by pressure-measuring device 13, in order to adjust probe pressure。Probe assembly and the temperature analog signal recorded are converted to digital signal and are transferred to computer 17 by temperature measuring set 14。Probe assembly and the voltage analog signal recorded are converted to digital signal and are transferred to computer 17 by pressure measuring instrument 15。Heating plate temperature controller 16 receives the heating plate temperature control command that computer 17 transmits, and controls heating plate temperature and is maintained at setting value。
Described computer 17 completes the setting of temperature control box 1 temperature, heating plate temperature sets, thermoelectrical potential measures the cycle and measures frequency setting, probe pressure shows in real time, and the data that probe temperature measuring instrument 14 and pressure measuring instrument 15 transmit are processed, it is thus achieved that sample thermoelectrical potential data。
Adopting metal fever electromotive force measuring instrument device of the present invention that test button is carried out thermoelectrical potential quickly to measure, key step includes:
Test button 18 to be measured being arranged on first bracer 5 on sample stage 2 and on second bracer 6, rotational support block upper handle clamps test button 18 to be measured；
Rotate the spiral handle of feed mechanism 11, control the first probe assembly 7 and the second probe assembly 8 moves and be adjacent to test button 18 to be measured to test button 18 to be measured, the pressure size of display on Real Time Observation computer 17, when pressure reaches desired value, the handle of the feed mechanism 11 that stops operating；
Close temperature control box 1, computer 17 arranges the temperature of temperature control box the 1, first heating plate 77 and the second heating plate, begins to warm up。
Setting measurement cycle and measurement frequency on computer 17, after the temperature of temperature control box the 1, first heating plate 77 and the second heating plate reaches setting value, start to read the first probe 71 and temperature difference △ T that the second probe records and voltage difference △ V, and calculated the thermoelectrical potential of sample by below equation: S=△ V/ △ T。
Compared to prior art, thermoelectrical potential measurement apparatus provided by the invention has the advantage that
1. control ambient temperature by temperature control box 1, eliminate the impact that measurement result is brought by variation of ambient temperature；
2. equipped with screw clamping mechanism on first bracer 5 and second bracer 6, can fast clamp and unload test button 18 to be measured；
3. first bracer 5 and the position of second bracer 6 and the position of probe assembly are adjustable, it is possible to suitable in the various sizes of test button 18 to be measured of clamping；
4. voltage measurement and the temperature survey same point on sample carries out, and eliminates the error that both bring when different measuring point；
5. can pop one's head in 71 and second probe size to test button 18 thrust to be measured by Non-follow control first, easy and simple to handle, eliminate the different impact on measurement result of thrust；
6., equipped with elastic component in probe assembly, can ensure in the irregular situation of specimen surface that two probes are in close contact with sample simultaneously。
Above the present invention is described in detail; the explanation of embodiment is only intended to help to understand method and the core concept thereof of the present invention; its object is to allow the personage being familiar with this art will appreciate that present disclosure and to implement according to this, can not limit the scope of the invention with this。All equivalences made according to spirit of the invention change or modify, and all should be encompassed within protection scope of the present invention。
Claims (10)
1. a metal fever electromotive force measuring instrument device, it is characterized in that: it includes temperature control box, it is provided with sample stage in described temperature control box, described instrument of measuring also includes the fixing device for being fixed on sample stage by test button to be measured, is used for measuring the measurement apparatus of test button to be measured, is used for control device that described measurement apparatus is controlled, and described fixing device and measurement apparatus are arranged on described sample stage。
2. a kind of metal fever electromotive force measuring instrument device according to claim 1, it is characterized in that: described measurement apparatus includes the first probe assembly and the second probe assembly that can be arranged on sample stage movably along Y direction, described fixing device includes to be mutually perpendicular to along first bracer that X-direction is slidingly arranged on sample stage and second bracer, described X-axis and Y-axis。
3. a kind of metal fever electromotive force measuring instrument device according to claim 2, it is characterized in that: described sample stage offers X axis dovetail groove along X-direction, Y-axis dovetail groove is offered along Y direction, described fixing device is slidably mounted in X axis dovetail groove, and described measurement apparatus is slidably mounted in Y-axis dovetail groove。
4. a kind of metal fever electromotive force measuring instrument device according to claim 2, it is characterised in that:
The first pillar that the first described probe assembly includes the first probe bearing, be installed on the first probe bearing, the first probe being installed on the first pillar, for the first heating plate to the first described probe heating, be provided with the first elastic component between the first described pillar and the described first probe bearing；
The second pillar that the second described probe assembly includes the second probe bearing, be installed on the second probe bearing, the second probe being installed on the second pillar, for the second heating plate to the second described probe heating, be provided with the second elastic component between the second described pillar and the described second probe bearing。
5. a kind of metal fever electromotive force measuring instrument device according to claim 4, it is characterised in that: described control device include the heating plate temperature controller for controlling the first heating plate and the second heating plate temperature respectively, for measuring the first probe and the temperature measuring set of the second probe temperature respectively。
6. a kind of metal fever electromotive force measuring instrument device according to claim 4, it is characterized in that: described control device include for control the first probe assembly and the second probe assembly in the Y-axis direction to the feed mechanism of test button loading force to be measured, for measuring the first probe, second probe force transducer to test button pressure to be measured, described force transducer is arranged at described the first probe assembly, between the second probe assembly and described feed mechanism。
7. a kind of metal fever electromotive force measuring instrument device according to claim 6, it is characterised in that: the described device that controls also includes one for measuring the pressure-measuring device of described force transducer pressure signal。
8. a kind of metal fever electromotive force measuring instrument device according to claim 2, it is characterised in that:
First bracer include the first V-block for clamping described test button to be measured, for regulating the first spiral handle of pressure between the first described V-block and described test button to be measured；
Second bracer include the second V-block for clamping described test button to be measured, for regulating the second spiral handle of pressure between the second described V-block and described test button to be measured。
9. a kind of metal fever electromotive force measuring instrument device according to claim 1, it is characterised in that: the described device that controls includes the temperature control box temperature controller for controlling described temperature control the temperature inside the box。
10. a kind of metal fever electromotive force measuring instrument device according to claim 4, it is characterised in that: the described device that controls also includes for measuring the pressure measuring instrument of voltage difference between the first probe and the second probe respectively。
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610109163.2A CN105699619B (en) | 2016-02-29 | 2016-02-29 | A kind of metal fever potential measuring instrument |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610109163.2A CN105699619B (en) | 2016-02-29 | 2016-02-29 | A kind of metal fever potential measuring instrument |
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| CN105699619A true CN105699619A (en) | 2016-06-22 |
| CN105699619B CN105699619B (en) | 2017-12-19 |
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| CN108459191A (en) * | 2018-03-26 | 2018-08-28 | 苏州热工研究院有限公司 | A kind of Portable thermal potential detector |
| CN108459046A (en) * | 2018-05-09 | 2018-08-28 | 哈尔滨工业大学 | The test device of film-type thermoelectric material Seebeck coefficient and conductivity |
| CN108490237A (en) * | 2018-03-08 | 2018-09-04 | 华中科技大学 | A kind of device and method of potable metal pipeline thermoelectric gesture nondestructive measurement |
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