CN101241071A - Minisize tension meter for infrared spectrometer - Google Patents
Minisize tension meter for infrared spectrometer Download PDFInfo
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- CN101241071A CN101241071A CNA2007100637397A CN200710063739A CN101241071A CN 101241071 A CN101241071 A CN 101241071A CN A2007100637397 A CNA2007100637397 A CN A2007100637397A CN 200710063739 A CN200710063739 A CN 200710063739A CN 101241071 A CN101241071 A CN 101241071A
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Abstract
The present invention relates to a mini-type extensograph on infrared spectrometer to process infrared red spectroscopic analysis of fibre material and film material in different temperature and different tensional state. Heating chamber in which has high temperature resistance linear guide and sample clamp, linear guide with linear displacement digital ruler are mounted on the base, and a constant velocity bidirectional tension mechanism with push pull rod connected with sample clamp seat and through the heating chamber, and bidirectional screw through the bottom of constant velocity bidirectional tension mechanism and inosculated with snail button of fixation block fixed on the bottom of two soleplates of constant velocity bidirectional tension mechanism are mounted on the linear guide. The bidirectional screw is connected with rapid motion mechanism and shaft sleeve of reducer to realize tension the sample in the conditions of heating, heat preservation-constant temperature under the control of temperature controller, linear sport speed control-display device, linear displacement control display device and stress sensor display device.
Description
Technical field
The present invention relates to the alternating temperature Dynamic IR spectrum test equipment of macromolecular material sample, relate in particular to the miniature tensilometer on the infrared spectrometer that uses when fibrous material and membraneous material carried out examination of infrared spectrum under different temperatures and extended state.
Background technology
Existing various examination of infrared spectrum equipment are under room temperature or alternating temperature (below the room temperature or more than the room temperature) state sample to be carried out the structural change test.And the mechanical test equipment of existing various samples (tensilometer of producing as American I NSTRON company) can only sampling mechanical property (as modulus, breaking elongation and stress-strain curve) wait and can not carry out the structural change analysis to sample simultaneously, i.e. the mechanical property of sample variation and structural change are separately carried out.Yet,, press for and understand sample structure when sample carried out mechanical test and change along with the development of material science and technology.How the two is organically combined and satisfy investigation of materials, especially satisfying macromolecular material research needs is good problems to study.
In broad terms, every in the sample structure state change process (as chemical change, alternating temperature process, tensile deformation etc.) carry out infrared spectrometry on the throne, all belong to Dynamic IR spectrum category.But usually Dynamic IR spectrum specially refers to the variation of the structure and the orientation of macromolecular material under stress in the literature.In this measurement, special small-sized drawing machine is placed in the sample cell of infrared spectrometer, so just can be under sample drawing process or stress the continuous coverage infrared spectrum.Previously used static measurement method can only obtain sample and be stretched to the molecular structure information that is in equilibrium state after a certain stage, and with the stress-strain curve of measuring can not be corresponding well; And the use kinetic measurement, molecular structure and the orientation information of each moment that then can obtain macromolecular material in drawing process, and more direct relation is arranged with the stress-strain of measuring.Dynamic IR spectrum is widely used in deformation process, structural change, orientation relaxation and the mechanism of fracture etc. of research macromolecular material under stress.
The Dynamic IR spectral measurement of bibliographical information is with design and the structure such as the H.W.Siesler of small-sized drawing machine, FOURIER TRANSFORM IFRARED (FTIR) SPECTROSCOPY IN POLYMERRESEARCH, Journal of Molecular Structure, 59 (1980) 15～37.R.P.Wool?andW.O.Statton，Journal?of?Polymer?Science：Polymer?Physics?Edition，vol.12，1575～1586(1974)，Dynamic?Polarized?Infrared?Studies?of?StressRelaxation?Creep?in?Polypropylene。Shen Deyan, " application of infra-red sepectrometry in macromolecule research ", Science Press, Beijing, 1982.Above-mentioned Dynamic IR spectral measurement has nothing in common with each other with the structure of small-sized drawing machine, the employing vertical structure that has, and the employing horizontal type structure that has, outward appearance is multifarious.These small-sized drawing machines all are for cooperating certain specific infrared spectrometer customized, adopt the open frame structure (seeing accompanying drawing 1) that cylindrical guide-screw mandrel machinery moves mostly, can not heat tracing-constant temperature, can only carry out examination of infrared spectrum at normal temperatures.Its physical dimension and volume are all bigger, and commercial goods infrared spectrograph sample pool space is narrow and small, can hold any more.This class drawing machine can only be used for aforesaid extraordinary infrared spectrometer.
Summary of the invention
The objective of the invention is to solve the problem how miniature tensilometer organically combines with common commercially available infrared spectrometer, promptly at any structure that does not change existing infrared spectrometer, particularly under the prerequisite of sample pool structure, a kind of miniature tensilometer that is used on the infrared spectrometer is provided, the sample cell narrow space of this miniature tensilometer being put into infrared spectrometer directly uses, and in heat tracing-constant temperature of realizing sample sample is stretched.
The sample cell of present commercial infrared spectrometer is shaped as rectangular parallelepiped or square, its up and down before and after in 6 faces, about two faces be sending of infrared beam and receiving position, and the back and following itself be the part of spectrometer, can not be split more and can not take.Only remaining front and above can be used as free space.Like this, miniature tensilometer can only stretch (vertical structure) or (horizontal type structure) stretched in the front upward.Consider in the commodity infrared spectrograph sample pond, send and the receiving center of infrared beam is wired to the distance of back mostly than farther to following distance, in order to make full use of the small space that sample cell is only deposited, the present invention adopts board-like cramped construction of line slideway and the equidistant stretching mode of horizontal single-axis bidirectional, to obtain the maximum tension amplitude and the measured position of sample is remained unchanged.
Of the present inventionly be used in miniature tensilometer on the infrared spectrometer by heating chamber, constant speed two-way stretch mechanism, temperature sensor, temperature control-display device, high temperature resistant line slideway in the heating chamber, the outer line slideway of heating chamber, strain gauge, the strain gauge display device, the salt sheet, sample clamp, clamping fixture seat, heat insulation post, point-to-point speed control-display device, straight-line displacement digital display chi, straight-line displacement control-display device, reverse-flighted screw, the motor speed reducing driving device, fast moving mechanism, electric cabinet, base plate, formation such as pull bar and reductor.
One heating chamber is fixed on the base with the line slideway that has straight-line displacement digital display chi, and line slideway is positioned at the heating chamber below; Two base plates that constant speed two-way stretch mechanism is arranged on the line slideway below the heating chamber, one end that passes a two-way screw rod of two base plate bottoms of constant speed two-way stretch mechanism places the reverse-flighted screw stationary installation on the base, the axle sleeve that the other end passes a reductor directly is connected with fast moving mechanism, one motor speed reducing driving device is connected with the gear of reductor by gear, and reverse-flighted screw passes the fixed block that has the spiral shell button on the two base plates bottom that is fixed on constant speed two-way stretch mechanism respectively, and the screw thread on the reverse-flighted screw and the spiral shell button on the fixed block match;
One base plate of described constant speed two-way stretch mechanism vertically is connected with a baffle plate that pull bar is installed, on one end of this pull bar heat insulation post is installed, heat insulation post links to each other with strain gauge, the other end of this pull bar penetrates in the heating chamber, and is connected with a clamping fixture seat that has sample clamp in the heating chamber; Another base plate of constant speed two-way stretch mechanism vertically is connected with a baffle plate that pull bar is installed, and the other end of this pull bar penetrates in the heating chamber, and is connected with another clamping fixture seat that has sample clamp in the heating chamber;
One has the heating chamber of lid, and high temperature resistant line slideway is installed in heating chamber, and two clamping fixture seats that have sample clamp are separately fixed on the high temperature resistant line slideway; On two side, have the light hole of symmetry, the salt sheet is installed in light hole, temperature sensor is housed at the loam cake of heating chamber perpendicular to the heating chamber on the pull bar direction;
Temperature control equipment on one electric cabinet is connected with temperature sensor by data line, point-to-point speed control-display device is connected with fast moving mechanism with the motor speed reducing driving device by data line, straight-line displacement control display device is connected with straight-line displacement digital display chi by data line, and the strain gauge display device is connected with strain gauge by data line.
Have one on the axle sleeve of described reductor the bolt hole that the locking reverse-flighted screw rotatablely moves is installed, and a bolt is arranged on this hole.
Described line slideway or high temperature resistant line slideway respectively are 2.
The baffle plate of described base plate and connection pull bar can be formed in one.
Described salt is NaCl or KBr.
The cover tape of described heating chamber has view window.
Described heating chamber is interlayer wall (comprising the bottom), the heating of constant power density is installed in interlayer, and is filled with insulation material (as the lightweight rock wool) in interlayer.
Heating chamber supports and is fixed on the base plate by four heat insulation posts, its profile is the cuboid enclosed construction, make by corrosion resistant plate inwall, outer wall and bottom, and whether so that at any time observe heating chamber in infrared light spot aim at situation that sample and sample be stretched at the top if being the glass visor.Evenly the distribute heating of constant power density of around between inwall and the outer wall and whole bottom is to guarantee the homogeneity of heating-up temperature.In interlayer, be filled with insulation material (as the lightweight rock wool), to reach the effectively insulating insulation.On the left and right sides wall of heating chamber a light hole is arranged respectively, wherein each salt sheet of installing plays heat-blocking action and allows infrared light see through simultaneously and do not allow heating chamber be connected with the external world (infrared spectrum that the salt sheet can not influence sample).
Heat insulation post is made with special rigidity thermal insulation material, plays heat-blocking action and avoids the high temperature in the heating chamber directly to conduct to strain gauge to guarantee its normal working temperature.
Sample clamp is band T shape boss or the embedded parallel-plate anchor clamps of swallow-tail form boss, after sample is clamped outside heating chamber it is embedded in the T type groove or dovetail groove of clamping fixture seat in the heating chamber.
The digital display meter of temperature control-display device, point-to-point speed control-display device, straight-line displacement control-display device and strain gauge display device is housed in the electric cabinet.Can select suitable programming rate/heating-up temperature, displacement (stretching) speed, displacement (stretch range) and stress (pulling force) by handling electric cabinet.
The motor speed reducing driving device is by driving the reverse-flighted screw rotation, two base plates that drive constant speed two-way stretch mechanism are made rectilinear motion in opposite directions on line slideway, this rectilinear motion finally passes to sample clamp in the heating chamber by strain gauge, heat insulation post and pull bar again.
The outer line slideway of heating chamber is positioned on the base plate under the heating chamber and is fixed on the base plate.Its effect is that rotatablely moving of reverse-flighted screw is converted into rectilinear motion and the effect of carrying by strain gauge and heat insulation post.And high temperature resistant line slideway is fixed on the interior bottom of heating chamber in the heating chamber.Its effect is, carrying and guiding sample clamp, clamping fixture seat and sample do not make them unsettled with the outer line slideway of heating chamber, thereby avoid them to tremble when mobile, and the common guarantee sample is stretched reposefully.
Point-to-point speed control-display device and straight-line displacement control-display device all are to utilize Hall effect to measure the number of turns of rotating speed of motor and rotation, thus indirect determination and control point-to-point speed and straight-line displacement.Straight-line displacement digital display chi is then directly measured straight-line displacement.Confirm mutually from straight-line displacement control-display device and the numerical value that draws from straight-line displacement digital display chi, to guarantee the accuracy of displacement.
The function of fast moving mechanism is that the mobile example anchor clamps are to assigned address rapidly.Especially on finishing, after the test of a sample, make sample clamp get back to the test that assigned address begins next sample rapidly.
According to the size in used infrared spectrograph sample pond, especially sample cell left and right sides infrared beam sends the distance that is wired to the sample cell back with receiving center, full and effective implementation the present invention.
Particularly, the width in pond designs the width [that is width of base plate] of the miniature tensilometer of the present invention per sample, and its width is preferably 70% to 80% for 60% to 90% of product pond width.Consider the determinative that the distance that is wired to the sample cell back with receiving center is the maximum displacement (maximum tension amplitude) that influences sample clamp of sending of sample cell left and right sides infrared beam, in order to make full use of the small space that sample cell is only deposited, enforcement of the present invention should be adopted the equidistant stretching mode of horizontal single-axis bidirectional, to obtain the maximum tension amplitude and the measured position of sample is remained unchanged.Particularly, extended line is approximately perpendicular to the sample cell bottom between the mid point between the center by reverse-flighted screw and two clamping fixture seats, and intersects with sending with the receiving center line of sample cell left and right sides infrared beam.Consider the wall thickness of heating chamber and the position that constant speed two-way stretch mechanism occupies, the maximum tension amplitude for times sample cell left and right sides infrared beam send with receiving center be wired to the sample cell back distance 70% to 80%.
Base plate can be made with aluminium or stainless steel and other metal materials, and also compound substance such as useable glass steel is made.Reverse-flighted screw can be made with metal materials such as stainless steel, medium carbon steel or bearing steels.Sample clamp and clamping fixture seat can be made with aluminium or stainless steel and other metal materials, and also available other exotic material is made.The outer line slideway of high temperature resistant line slideway and heating chamber all can use rectangle or circular line slideway and ball slide block in the heating chamber, but the former size is more much smaller than the latter.
The sample cell that the miniature tensilometer that is used on the infrared spectrometer of the present invention can directly be put into common infrared spectrometer uses, can obtain the infrared spectrum and the stress-strain curve of sample under room temperature to 280 ℃ and extended state simultaneously, especially fiber and film sample are stretching and the microstructure change of alternating temperature process to be used for characterizing macromolecule sample.
Description of drawings
Fig. 1. the small-sized tensilometer (horizontal) of known background technology.
Fig. 2. the small-sized tensilometer (vertical) of known background technology.
Fig. 3. the structural representation that is used in the miniature tensilometer on the infrared spectrometer of the present invention.
Fig. 3-the structural representation that is used in the heating chamber of the miniature tensilometer on the infrared spectrometer 1. of the present invention.
Fig. 4. the vertical view that is used in the miniature tensilometer on the infrared spectrometer of the present invention.
Fig. 5. the infrared spectrogram of the embodiment of the invention 1.
Fig. 6. the infrared spectrogram of the embodiment of the invention 2.
Reference numeral
1. heating chamber 2. constant speed two-way stretch mechanisms
3. temperature sensor 4. temperature control-display device
5. the outer line slideway of high temperature resistant line slideway 6. heating chambers in the heating chamber
7. strain gauge 7 '. the strain gauge display device
8. light hole 9. salt sheets
10. sample clamp 11. clamping fixture seats
12. heat insulation post 13. point-to-point speed control-display device
14. straight-line displacement digital display chi 15. straight-line displacement control-display device
16. reverse-flighted screw 17. motor speed reducing driving devices
18. fast moving mechanism 19. electric cabinets
20. base plate 21. samples
22. heating chamber loam cake (band view window) 23. infrared lights
24. the axle sleeve of pull bar 25. reductors
31. base 32. hand winches
33. guide rail 34. moves seat
35. anchor clamps 36. samples
37. CD-ROM drive motor 38. reverse-flighted screws
39. linear displacement transducer 41. hydraulic cylinders
42. pull bar 43. operation valves
44. slide rail 45. linear displacement transducers
46. piston 47. sample clamps
48. strain gauge 49. samples
50. base 51. chucks
Embodiment
See also Fig. 3, Fig. 3-1 and Fig. 4.
One has and builds 22 heating chamber 1 having of view window (bottom that comprises heating chamber is the interlayer wall, the heating of constant power density is installed in interlayer, and in interlayer, be filled with as the lightweight rock wool) make by corrosion resistant plate, heating chamber 1 and the 2 rectangle line slideways 6 being made by aluminium alloy that have a straight-line displacement digital display chi 14 are fixed on the base 20 that a usefulness aluminium alloy plate makes, and line slideway 6 is positioned at heating chamber 1 below; Two base plates of making by corrosion resistant plate that constant speed two-way stretch mechanism is arranged on the line slideway below the heating chamber 16, one end of the reverse-flighted screw 16 that one a usefulness stainless steel bar that passes 2 two base plate bottoms of constant speed two-way stretch mechanism is made places the reverse-flighted screw stationary installation on the base 20, the axle sleeve 25 that the other end passes a reductor directly is connected with fast moving mechanism 18, one motor speed reducing driving device 17 is connected with the gear of reductor by gear, and reverse-flighted screw 1 passes the fixed block that has the spiral shell button (as nut) on the two base plates bottom that is fixed on constant speed two-way stretch mechanism 2 respectively, and the screw thread on the reverse-flighted screw 1 and the spiral shell button on the fixed block match;
One base plate of described constant speed two-way stretch mechanism 2 vertically is connected with a baffle plate of being made by corrosion resistant plate that the pull bar 24 made by stainless steel bar is installed, heat insulation post 12 is installed on one end of this pull bar 24, heat insulation post 12 links to each other with strain gauge 7, the other end of this pull bar 24 penetrates in the heating chamber 1, and is connected with the clamping fixture seat 11 that has sample clamp 10 (making with stainless steel bar) that the usefulness stainless steel bar in the heating chamber 1 is made; Another base plate of constant speed two-way stretch mechanism 2 vertically is connected with a baffle plate of being made by corrosion resistant plate that the pull bar 24 made by stainless steel bar is installed, the other end of this pull bar 24 penetrates in the heating chamber 1, and is connected with another clamping fixture seat 11 that has sample clamp 10 in the heating chamber 1;
The clamping fixture seat 11 that 2 high temperature resistant rectangle line slideways of being made by aluminium alloy 5, two have sample clamp 10 is installed in heating chamber 1 to be separately fixed on the high temperature resistant line slideway 5; On two side, have the light hole 8 of symmetry perpendicular to the heating chamber 1 on pull bar 24 directions, NaCl salt sheet 9 is installed in light hole 8, one sample 21 is clamped by two sample anchor clamps 10, and infrared light 23 is radiated on the sample 21 through light hole 8, at the loam cake 22 of heating chamber 1 temperature sensor 3 is housed;
Motor speed reducing driving device 17 and fast moving mechanism 18 all adopt DC micromotor/variable voltage control harmonic gear to slow down, but the latter's final output speed is the former 30 times when same voltage.Draw speed is regulated arbitrarily at 0.1 millimeter/minute～10 millimeters/minute, and the maximum tension amplitude is 110 millimeters.Temperature control-display device 4 adopts PID type digital display temperature controller and Pt-100 temperature sensors, and temperature-control range is in room temperature to 280 ℃, accuracy of temperature control ± 0.1 ℃.
Motor speed reducing driving device 17 also can adopt computing machine/step motor drive mode (but can increase cost).Straight-line displacement digital display chi 14 adopts commercially available electronic digital indicator to process 150 millimeters of ranges, 0.01 millimeter of precision.Strain gauge 7 adopts piezoelectric type strain gauge, range 10Kgf, measuring accuracy 0.05%FS.
On the axle sleeve 25 of reductor, have one the bolt hole that locking reverse-flighted screw 16 rotatablely moves is installed, and a bolt is arranged on this hole, unclamp the bolt that locking reverse-flighted screw 16 rotatablely moves, drive reverse-flighted screw 16 fast moving by fast moving mechanism 18 and arrive the sample desired location, motor speed reducing driving device 17 is not worked at this moment; When sample is stretched, the bolt that locking reverse-flighted screw 16 rotatablely moves, fast moving mechanism 18 quits work, by 17 work of motor speed reducing driving device, motor speed reducing driving device 17 drives reverse-flighted screws 16 and moves that (fast moving mechanism 18 is driven by reverse-flighted screw 16, passive idle running), and drive 11 motions of pull bar 24 drive clamping fixture seats, sample is stretched.Unclamp the bolt that locking reverse-flighted screw 16 rotatablely moves, also can directly drive reverse-flighted screw 16 and move (motor speed reducing driving device 17 is not worked), and drive 11 motions of pull bar 24 drive clamping fixture seats, sample is stretched by fast moving mechanism 18.
The sample cell that above-mentioned miniature tensilometer can directly be put into common infrared spectrometers such as TENSOR 27 types that produce as U.S. BRUKER company or EQUINOX 55 types uses, and obtains the infrared spectrum of sample under room temperature to 280 ℃ and extended state simultaneously.
Syndiotactic polypropylene (sPP) film, size is long * wide * thick be 10 * 3 * 0.1mm, at room temperature (25 ℃) stretch, draw speed 5mm/min, tensile strain is 100%, 150%, 200%, 250%, 300% and 400%, infrared spectrum as shown in Figure 5.
Utilize the miniature tensilometer of embodiment 1, put into the sample cell of common infrared spectrometers such as TENSOR 27 types that U.S. BRUKER company produces or EQUINOX 55 types, under room temperature to 280 ℃ and extended state, obtain the infrared spectrum of sample simultaneously.
Syndiotactic polypropylene (sPP) film, size is long * wide * thick be 10 * 3 * 0.1mm, stretch down at 60 ℃, draw speed 10mm/min, tensile strain is 100%, 150%, 200%, 250%, 300% and 400%, infrared spectrum as shown in Figure 6.
Claims (9)
1. a miniature tensilometer that is used on the infrared spectrometer is made of high temperature resistant line slideway, the outer line slideway of heating chamber, strain gauge, strain gauge display device, salt sheet, sample clamp, clamping fixture seat, heat insulation post, point-to-point speed control-display device, straight-line displacement digital display chi, straight-line displacement control-display device, reverse-flighted screw, motor speed reducing driving device, fast moving mechanism, electric cabinet, base plate, pull bar and reductor in heating chamber, constant speed two-way stretch mechanism, temperature sensor, temperature control-display device, the heating chamber; It is characterized in that:
One heating chamber is fixed on the base with the line slideway that has straight-line displacement digital display chi, and line slideway is positioned at the heating chamber below; Two base plates that constant speed two-way stretch mechanism is arranged on the line slideway below the heating chamber, one end that passes a two-way screw rod of two base plate bottoms of constant speed two-way stretch mechanism places the reverse-flighted screw stationary installation on the base, the axle sleeve that the other end passes a reductor directly is connected with fast moving mechanism, one motor speed reducing driving device is connected with the gear of reductor by gear, and reverse-flighted screw passes the fixed block that has the spiral shell button on the two base plates bottom that is fixed on constant speed two-way stretch mechanism respectively, and the screw thread on the reverse-flighted screw and the spiral shell button on the fixed block match;
One base plate of described constant speed two-way stretch mechanism vertically is connected with a baffle plate that pull bar is installed, on one end of this pull bar heat insulation post is installed, heat insulation post links to each other with strain gauge, the other end of this pull bar penetrates in the heating chamber, and is connected with a clamping fixture seat that has sample clamp in the heating chamber; Another base plate of constant speed two-way stretch mechanism vertically is connected with a baffle plate that pull bar is installed, and the other end of this pull bar penetrates in the heating chamber, and is connected with another clamping fixture seat that has sample clamp in the heating chamber;
One has the heating chamber of lid, and high temperature resistant line slideway is installed in heating chamber, and two clamping fixture seats that have sample clamp are separately fixed on the high temperature resistant line slideway; On two side, have the light hole of symmetry, the salt sheet is installed in light hole, temperature sensor is housed at the loam cake of heating chamber perpendicular to the heating chamber on the pull bar direction;
Temperature control equipment on one electric cabinet is connected with temperature sensor by data line, point-to-point speed control-display device is connected with fast moving mechanism with the motor speed reducing driving device by data line, straight-line displacement control display device is connected with straight-line displacement digital display chi by data line, and the strain gauge display device is connected with strain gauge by data line.
2. the miniature tensilometer that is used on the infrared spectrometer according to claim 1 is characterized in that: have one on the axle sleeve of described reductor the bolt hole that the locking reverse-flighted screw rotatablely moves is installed, and a bolt is arranged on this hole.
3. the miniature tensilometer that is used on the infrared spectrometer according to claim 1 is characterized in that: high temperature resistant line slideway respectively is 2 in outer line slideway of described heating chamber or the heating chamber.
4. according to claim 1 or the 3 described miniature tensilometers that are used on the infrared spectrometer, it is characterized in that: the outer line slideway of high temperature resistant line slideway and heating chamber all is rectangle line slideway, circular line slideway or ball slide block in the described heating chamber.
5. the miniature tensilometer that is used on the infrared spectrometer according to claim 1 is characterized in that: the baffle plate of described base plate and connection pull bar can be formed in one.
6. the miniature tensilometer that is used on the infrared spectrometer according to claim 1 is characterized in that: described salt is NaCl or KBr.
7. the miniature tensilometer that is used on the infrared spectrometer according to claim 1, it is characterized in that: the cover tape of described heating chamber has view window.
8. according to claim 1 or the 7 described miniature tensilometers that are used on the infrared spectrometer, it is characterized in that: described heating chamber is the interlayer wall, and the heating of constant power density is installed in interlayer, and is filled with insulation material in interlayer.
9. the miniature tensilometer that is used on the infrared spectrometer according to claim 1 is characterized in that: described sample clamp is band T shape boss or the embedded parallel-plate anchor clamps of swallow-tail form boss, and clamping fixture seat is T type groove or dovetail groove.
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| CNB2007100637397A CN100533121C (en) | 2007-02-08 | 2007-02-08 | Minisize tension meter for infrared spectrometer |
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