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1. (WO2019047399) FILTERING METHOD BASED ON ORTHOGONAL BASIS FUNCTION, SIGNAL PROCESSING APPARATUS, AND GROUND LABELLING SYSTEM
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Pub. No.: WO/2019/047399 International Application No.: PCT/CN2017/114488
Publication Date: 14.03.2019 International Filing Date: 04.12.2017
IPC:
G01N 27/83 (2006.01)
G PHYSICS
01
MEASURING; TESTING
N
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
27
Investigating or analysing materials by the use of electric, electro-chemical, or magnetic means
72
by investigating magnetic variables
82
for investigating the presence of flaws
83
by investigating stray magnetic fields
Applicants:
清华大学 TSINGHUA UNIVERSITY [CN/CN]; 中国北京市 海淀区清华园1号 No.1, Qinghua Yuan, Haidian District, Beijing 100084, CN
Inventors:
郭静波 GUO, Jingbo; CN
朴冠宇 PIAO, Guanyu; CN
胡铁华 HU, Tiehua; CN
Agent:
北京华进京联知识产权代理有限公司 ACIP LAW OFFICES; 中国北京市 海淀区知春路7号致真大厦A1403 Rm.1403, Tower A, Truth Plaza, No.7 Zhichun Road, Haidian District, Beijing 100191, CN
Priority Data:
201710811992.X11.09.2017CN
Title (EN) FILTERING METHOD BASED ON ORTHOGONAL BASIS FUNCTION, SIGNAL PROCESSING APPARATUS, AND GROUND LABELLING SYSTEM
(FR) PROCÉDÉ DE FILTRAGE FONDÉ SUR UNE FONCTION DE BASE ORTHOGONALE, APPAREIL DE TRAITEMENT DE SIGNAL ET SYSTÈME DE MARQUAGE AU SOL
(ZH) 基于正交基函数的滤波方法、信号处理装置及地面标记系统
Abstract:
(EN) Provided in the present application are a filtering method based on an orthogonal basis function, a signal processing apparatus, and a ground labelling system. The filtering method comprises: acquiring a magnetic signal; and using a convolutional factor based on an orthogonal basis function to filter the magnetic signal, the acquired filtered signal being the product of the magnetic signal and the convolutional factor. The filtering method based on an orthogonal basis function, the signal processing apparatus, and the ground labelling system provided in the present application use a convolutional factor based on an orthogonal basis function to filter the magnetic signal, the acquired filtered signal having a higher signal-to-noise ratio; using the filtered signal can increase the accuracy of magnetic flux leakage determination.
(FR) La présente invention concerne un procédé de filtrage fondé sur une fonction de base orthogonale, un appareil de traitement de signal et un système de marquage au sol. Le procédé de filtrage consiste : à acquérir un signal magnétique ; et à utiliser un facteur de convolution en fonction d'une fonction de base orthogonale pour filtrer le signal magnétique, le signal filtré acquis étant le produit du signal magnétique et du facteur de convolution. Le procédé de filtrage fondé sur une fonction de base orthogonale, l'appareil de traitement de signal et le système de marquage au sol de la présente demande utilisent un facteur de convolution en fonction d'une fonction de base orthogonale pour filtrer le signal magnétique, le signal filtré acquis présentant un rapport signal sur bruit plus élevé ; l'utilisation du signal filtré peut augmenter la précision de la détermination de fuite de flux magnétique.
(ZH) 本申请提供一种基于正交基函数的滤波方法、信号处理装置及地面标记系统。所述滤波方法,包括:获取磁信号;利用基于正交基函数的卷积因子,对所述磁信号进行滤波,获得滤波后滤波信号为所述磁信号与所述卷积因子的乘积。本申请所提供的基于正交基函数的滤波方法、信号处理装置及地面标记系统利用基于正交基函数的卷积因子,对磁信号进行滤波,获得滤波后滤波信号信噪比更高,利用此滤波信号能够提高漏磁判断的准确性。
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Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: Chinese (ZH)
Filing Language: Chinese (ZH)