Monofilament orientation degree measuring device and measuring method based on cross-correlation algorithm
A technology of a cross-correlation algorithm and a measuring device, which is applied in the field of a single-filament orientation degree measuring device based on a cross-correlation algorithm, can solve the problems of unsuitability for industrial applications, expensive instruments, etc., and achieves avoiding destructive measurement, convenient operation, and reducing measurement errors. Effect
Pending Publication Date: 2017-08-01
JILIN UNIV
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Problems solved by technology
X-ray diffraction measurement results can only be used for comparison and qualitative measurement, and the required equipment is expensive, not suitable for industrial applications
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[0051] The monofilament orientation measurement device based on the cross-correlation algorithm is composed of a sound signal transmission device and an electrical signal processing device. The structure of the sound signal transmission device includes a horizontally arranged rod-shaped scale base 7 with scales in the axial direction. The range is 0-1m. Vertical rod-shaped sample fixing brackets 8 are fixedly installed at both ends of the scale base 7. Each sample fixing bracket 8 has a fixing clip 5 at the top. The fixing clip 5 consists of two sound-absorbing thin pads 9 and A metal clip 10 is composed. There are two vertical piezoelectric ceramic supports 6 between the two sample fixing supports 8 at both ends. The two piezoelectric ceramic supports 6 are movably mounted on the scale base 7, and the two piezoelectric ceramic supports 6 can be along the scale. For the axial sliding of the base 7, the two piezoelectric ceramic brackets 6 have the same structure, and both are r...
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Abstract
The invention provides a monofilament orientation degree measuring device and a measuring method based on a cross-correlation algorithm. The measuring device is formed by an acoustic signal transmission device and an electric signal processing device, wherein the acoustic signal transmission device is formed by a weight, a piezoelectric ceramic sensor, a monofilament sample, conductive metal, a retaining clip, a piezoelectric ceramic support, a scale base and a sample fixing support; the electric signal processing device is formed by a power supply, a power supply inverter, a drive level generator, a signal processor, a signal acquiring device, a data processor and a display; the measuring method is characterized by utilizing the cross-correlation algorithm for calculating a receiving time difference between two received waveforms so as to measure a monofilament orientation degree. According to the monofilament orientation degree measuring device and the measuring method based on the cross-correlation algorithm provided by the invention, the measurement of the orientation degree of any filiform high-molecular polymer can be realized, the nondestructive testing of the monofilament orientation degree is realized, the sensor error introduced by a traditional method is avoided, the measuring cost is reduced, and the measuring accuracy and stability of the monofilament orientation degree are improved.
Description
Technical field [0001] The invention belongs to the field of measurement control, and specifically relates to a single-filament orientation degree measuring device and a measuring method based on a cross-correlation algorithm. Background technique [0002] Monofilament is a single filament with a small count produced by a single-hole spinneret in the production of chemical fibers, and is widely used in production and life. The degree of orientation refers to the fact that when the polymer material is subjected to external force during processing and manufacturing, the polymer chains will be arranged in an orderly manner along the direction of the force. The neat degree of the arrangement is called the degree of orientation. The degree of orientation of polymer materials is different, and the strength, hardness and other properties shown by it are different. Therefore, it is necessary to measure the degree of orientation. [0003] At present, the measurement of polymer orientation ...
Claims
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IPC IPC(8): G01N29/07
CPCG01N29/07
Inventor 李宝华王忠新陈小彦季春秋高咏张庆玲朴盛华
Owner JILIN UNIV