Unlock instant, AI-driven research and patent intelligence for your innovation.
Method for detecting quality of long carbon fiber bundle based on conductive information
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A long carbon fiber, information detection technology, applied in measuring devices, material analysis by electromagnetic means, instruments, etc., can solve the problems of discrete measurement of measurement methods
Inactive Publication Date: 2020-06-16
CENT SOUTH UNIV
View PDF7 Cites 0 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
Patent CN105629068A discloses a method for measuring the volume resistivity of carbon fiber, using carbon fiber monofilament as the test sample, which eliminates the measurement errors caused by hairy filaments and broken filaments when testing bundled filament samples, but the measurement method is still discrete measurement
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0067] Test material: T300 degummed carbon fiber, length 2000mm, Figure 8 The physical picture of the test sample;
[0068] Binding post spacing / length of information collection area: 150mm;
[0074] Figure 9 is the measured voltage-distance curve, C r =0.02, according to |measured voltage signal-standard voltage signal| / standard voltage signalr , It is determined that there is no defect, and the test is qualified.
[0079] Movement mode: sample movement, detection device is still;
[0080] Sample movement speed: 25mm / s;
[0081] Signal acquisition frequency: 50 times / s;
[0082] Standard voltage: 2.135V;
[0083] Figure 10 is the measured voltage-distance curve, C r =0.02, according to |measured voltage signal-standard voltage signal| / standard voltage signal≥C r , it is determined that there is one defect, the voltage within the position range of 753mm-783mm rises abnormally, and the corresponding defect enters the information collection area, Y m =2.30V, the voltage returns to normal within the range of 903mm-933mm, the corresponding defect leaves the information collection area, the distances between the start point and end point of the defect and the start point of information collection are 903mm and...
[0093] Figure 12 is the obtained resistance-distance curve, C r =0.005, according to |obtained resistance-standard resistance| / standard resistance≥C r , it is determined that there is one defect, and the resistance within the range of 700mm-723mm drops abnormally, and the corresponding defect enters the information collection area, Y m =38.10Ω, the resistance returns to normal within the position range of 800mm-823mm, the corresponding defect leaves the information collection area, the distances between the start point and end point of the defect and the start point of information collection ar...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More
PUM
Property
Measurement
Unit
Length
aaaaa
aaaaa
Length
aaaaa
aaaaa
Login to View More
Abstract
The invention relates to a method for detecting quality of a long carbon fiber bundle based on conductive information, and belongs to the technical field of quality detection. The method comprises thefollowing steps: continuously collecting information of the long carbon fiber bundle, and judging the quality of the long carbon fiber bundle according to the collected information and calculated information parameters, wherein the information includes but is not limited to a voltage, a current and a position, the information is continuous information, and the information parameters are selectedfrom at least one of a resistance, resistivity, electric conductivity, conductivity and a voltage; comparing the obtained information parameters with standard information parameters; and when |the obtained information parameter-standard information parameter| / standard information parameter is grerater than or equal to a defect judgment threshold value, judging that a defect exists in an area corresponding to the obtained information parameter, and when |the obtained information parameter-standard information parameter| / standard information parameter is less than the defect judgment threshold value, judging that the quality of the area corresponding to the obtained information parameter is qualified. During detection, a detection device and the long carbon fiber bundle move relatively.
Description
technical field [0001] The invention relates to a method for detecting the quality of long carbon fiber bundles based on conductive information, which belongs to the technical field of quality detection, and specifically belongs to the technical field of continuous detection of non-metallic materials. Background technique [0002] Due to its high specific strength, high specific modulus, high electrical conductivity, high temperature resistance, corrosion resistance and many other excellent properties, carbon fiber has been used in aerospace, shipping, vehicle production, military and national defense and other industrial fields in recent years. In February 2018, China completely independently developed the first 100-ton T1000 carbon fiber production line. In the future, the research and development of carbon fiber will develop in the direction of technological diversification, which is both an opportunity and a challenge for the domestic carbon fiber industry. [0003] Car...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to View More