CN2137788Y - Detecting instrument for bending rigidity of fibre and yarn - Google Patents
Detecting instrument for bending rigidity of fibre and yarn Download PDFInfo
- Publication number
- CN2137788Y CN2137788Y CN 92226298 CN92226298U CN2137788Y CN 2137788 Y CN2137788 Y CN 2137788Y CN 92226298 CN92226298 CN 92226298 CN 92226298 U CN92226298 U CN 92226298U CN 2137788 Y CN2137788 Y CN 2137788Y
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- frequency
- sample
- electric field
- instrument
- yarn
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- Expired - Fee Related
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Treatment Of Fiber Materials (AREA)
Abstract
The utility model provides a detecting instrument used to directly measure the bending rigidity performance of the textile fabric or the yarn. In the instrument, a frequency generator (1) whose frequency can be adjusted in a limited range and a high-voltage isolator (2) make the test specimen with a certain length generate the stable resonance, and the test specimen is clamped in a test mechanism (4); the resonance frequency value is traced and displayed by an SCM data processing system (5), a digital display block (6) and an input keyboard (7), or the bending rigidity numerical value can be directly calculated and displayed according to the frequency at the time of the maximum crest.
Description
The utility model relates to the testing tool of a kind of textile fibres or yarn.
The bendind rigidity of textile fibres or yarn is to reflect its important physical index of crooked deformability under external force.In present research and production practice, people utilize the yarn strength instrument to test its access node intensity mostly or hook strength is evaluated this index indirectly, have in addition also adopt hand to estimate the original method of range estimation.Though the former is feasible in theory, in practical measurement, because influenced by sample bar evenness, surface structure and stress very big, thereby the result is often very inaccurate, sometimes even unusual phenomenon can occur.
Early fifties, the device that rattan clear three was once studied a kind of fiber bendind rigidity is heavily controlled, pacified to the little wild wood of Japan, and it is to utilize vibrograph, by the shuttle belt kinetodesma sample starting of oscillation of diffuser, measures its resonance frequency and calculates bendind rigidity.From the situation analysis that document is introduced, this device only is a kind of experimental provision of principle, as ripe practical means of testing one segment distance is arranged still.Up at present, do not found the testing tool that grows up on this basis yet.
Therefore, the purpose of this utility model is to provide the instrument of a kind of direct mensuration fiber or yarn bendind rigidity performance, and realizes that the automaticdata of test result calculates, exports.
In order to achieve the above object, the utility model has adopted an alternating electric field as oscillation source in instrument, pass through mechanism for testing, make fiber or sample of yarn under certain condition and state, enter this alternating electric field, and make sample stablize starting of oscillation by high-voltage power supply, change electric field frequency, the amplitude of vibration sample also changes thereupon, during peak swing, the vibration frequency of electric field and the natural frequency of sample are complementary, the frequency number of this moment shows by the data processing display system of instrument, perhaps is converted into the bendind rigidity value and shows.
Describe principle of work of the present utility model and structural representation in detail below in conjunction with accompanying drawing, wherein:
1 frequency generator, 7 keyboards
2 frequency amplifiers, 8 supports
9 rotating shafts of 3 high-voltage power supplies
4 mechanism for testing, 10 dull and stereotyped specimen holders
5 single-chip data disposal systems, 11 metal polar plates
6. digital displaying block 12 sample fixed length clippers
By accompanying drawing as seen, the utility model structurally mainly comprises frequency generator 1, high-voltage power supply 3, mechanism for testing 4, data input, processing, display system 7,5,6 four major parts.According to test request, the frequency that frequency generator 1 is produced should be adjustable within the specific limits, and its signal amplifies on two metal polar plates 11 that insert in the mechanism for testing 4 through amplifier 2, has formed an alternating electric field.High-voltage power supply 3 is that electrostatic generator is another key element that constitutes sample stable oscillation stationary vibration, and the high direct voltage that is produced by its directly feeds on the dull and stereotyped specimen holder 10 in the mechanism for testing 4, makes on the sample band a constant electric charge, vibrates under the induction of AC field.
The mechanism for testing of instrument mainly is made of dull and stereotyped specimen holder 10, metal polar plate 11, sample fixed length clippers 12.Consider that sample is a linear material, should allow certain rotary freedom during clamping, therefore, dull and stereotyped specimen holder 10 is loaded on the support 8 by a rotating shaft 9 that is provided with along the center.Consider mounting or dismounting sample and the convenience of adjusting sample position in alternating electric field again, the high and low position of two metal polar plates 11 or support 8 can be regulated by a governor motion (not shown).
In addition, by theoretical calculation formula as can be known, the bendind rigidity of sample except that with square being directly proportional of its intrinsic vibration frequency, also be directly proportional with the biquadratic of specimen length.Therefore, accurately the clip specimen length also is one of key factor of instrument test.The utility model is equipped with a sample fixed length clippers 12 below dull and stereotyped specimen holder 10, and be provided with thereon the band scale the height adjustment mechanism (not shown), accurately regulate the height of sample fixed length clippers 12, promptly accurately controlled the clip length of sample.
In order to show the bendind rigidity measured value of fiber or yarn intuitively, make instrument possess functions such as counting, calculating, demonstration, the utility model is provided with single-chip data disposal system 5, digital displaying block 6 and input keyboard 7 in equipment circuit.After the instrument start, system's automatic clear is in waiting status.Machine on sample, after test preliminary work is ready, by the numerical key in the keyboard 7, the length of input and demonstration tested sample; By feeler switch, make instrument be in the surveying work state again, promptly show the frequency number that puts on alternating electric field on the metal polar plate 11.At this moment, the sample that is loaded with constant charge vibrates under the induction of AC field, makes sample produce the observable amplitude of naked eyes.Change electric field frequency by frequency generator 1, the sample amplitude is also corresponding to change, and when electric field frequency is greater than or less than the natural frequency of sample, the amplitude of sample all will diminish; Have only the natural frequency of electric field frequency and sample to be complementary, when promptly reaching resonance, operating personnel can be observed the peak swing of sample, at this moment, by the calculation key in the keyboard 7, the electric field frequency number of correspondence or be converted into the bendind rigidity value according to formula and show during with peak swing, thus test process finished one time.If in the test process, change the length of sample, when importing again, can make instrument return to initial state by the reset key in the keyboard 7, operate again by said process again.
What deserves to be explained is, number of digital key in the instrument keyboard 7, be provided with the testing length of some grades of samples, determining of its each grade numerical value is the sample according to different cultivars, specification, to guarantee that sample has certain amplitude size (1-2mm) in test process, can with the naked eye clearly observe, and have stable vibration frequency again, the minimizing error is a principle, calculates by setting value and actual test and revises that experiment repeatedly determines.For example, determine that sample is the mulberry silk of 20/22D, its testing length should be got 20mm and be advisable.
Pass through the utility model, make the textile fibres that is based upon on the fiber vibration principle or yarn bendind rigidity method of testing instrumentation, practicability, the bendind rigidity performance of measuring fiber or yarn in scientific research and the actual production directly, quickly and easily become a reality, thereby solved the difficult problem that people for a long time manage to solve.With regard to instrument self, the utlity model has simple in structure, easy to operate, data accurately, reliable, the advantage that repeatability is good.
Claims (4)
1, a kind of instrument that is suitable for measuring fiber or yarn bendind rigidity performance, it is characterized in that being provided with one by dull and stereotyped specimen holder (10), metal polar plate (11), the mechanism for testing (4) that sample fixed length clippers (12) is constituted, by a high-voltage power supply (3) and a frequency generator (1) and the frequency amplifier (2) that frequency is adjustable within the specific limits, respectively clamping sample and metal polar plate (11) are applied constant electric charge and alternating electric field, and single-chip data disposal system (5) is set, digital displaying block (6), input keyboard (7), input and demonstration sample fixed length, electric field frequency perhaps calculates demonstration bendind rigidity numerical value.
2,, it is characterized in that dull and stereotyped specimen holder (10) is loaded on the support (8) by a rotating shaft (9) that is provided with along the center according to the described instrument of claim 1.
3,, it is characterized in that the working depth of sample fixed length clippers (12) can accurately be regulated according to the described instrument of claim 1.
4,, it is characterized in that the height of metal polar plate (11) or support (8) can be regulated according to the position that sample enters alternating electric field according to claim 1 and 2 described instruments.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92226298 CN2137788Y (en) | 1992-06-27 | 1992-06-27 | Detecting instrument for bending rigidity of fibre and yarn |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92226298 CN2137788Y (en) | 1992-06-27 | 1992-06-27 | Detecting instrument for bending rigidity of fibre and yarn |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2137788Y true CN2137788Y (en) | 1993-07-07 |
Family
ID=33770641
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92226298 Expired - Fee Related CN2137788Y (en) | 1992-06-27 | 1992-06-27 | Detecting instrument for bending rigidity of fibre and yarn |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2137788Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101949801A (en) * | 2010-09-06 | 2011-01-19 | 东华大学 | Fabric bending resistance continuous measuring device and method and use |
| CN104655498A (en) * | 2015-03-19 | 2015-05-27 | 哈尔滨工业大学 | Device and method for measuring yarn bending rigidity |
-
1992
- 1992-06-27 CN CN 92226298 patent/CN2137788Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101949801A (en) * | 2010-09-06 | 2011-01-19 | 东华大学 | Fabric bending resistance continuous measuring device and method and use |
| CN104655498A (en) * | 2015-03-19 | 2015-05-27 | 哈尔滨工业大学 | Device and method for measuring yarn bending rigidity |
| CN104655498B (en) * | 2015-03-19 | 2017-04-19 | 哈尔滨工业大学 | Device and method for measuring yarn bending rigidity |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |