PATENT CLAIM ANALYSIS

Application Number: 16405728
Application Type: Utility
Filing Date: 2019-05
Publication Date: 2019-10
Patent Classification: ["702", "092000"]

Abstract:
Methods and apparatuses for calibrating attitude-independent parameters of a 3-D magnetometer are provided. A calibration method includes storing and updating data related to a N×9 matrix T and a N×1 matrix U extended for each measurement with an additional row and an additional element, respectively, the additional row and the additional element being calculated based on values measured by the 3-D magnetometer for the respective measurement. The method further includes calculating analytically (1) a symmetric non-orthogonal 3×3 matrix D representing scaling and skew of the 3-D magnetometer measured values and (2) a vector b representing bias of the 3-D magnetometer measured values, using the stored data and a singular value decomposition (SVD) method.

Claim (Index 32):
The apparatus of  claim 30  wherein the data processing unit is configured to calculate the symmetric non-orthogonal 3\u00d73 matrix D and the vector b by:\n (1) computing a vector K=(T T \u00d7T) \u22121 \u00d7T T \u00d7U; \n (2) generating a matrix F using elements of the vector K, and determining a matrix G, where F=G\u00d7G, using a singular value decomposition method; \n (3) determining a scale offset bias {tilde over (b)}=G \u22121 \u00d7[K(6) K(7) K(8)] T , \n (4) determining a scale factor \n co = \uf603 H \uf604 2 [ K \ue8a0 ( 6 ) K \ue8a0 ( 7 ) K \ue8a0 ( 8 ) ] \u00d7 F - 1 \u00d7 [ K \ue8a0 ( 6 ) K \ue8a0 ( 7 ) K \ue8a0 ( 8 ) ] T - K \ue8a0 ( 9 ) where |H| 2  is a square of local geomagnetic field strength;\n (5) calculating the vector b=sqrt(co)\u00b7{tilde over (b)} and matrix pD=sqrt(co)\u00b7G; and \n (6) extracting the symmetric non-orthogonal 3\u00d73 matrix D=pD\u2212I 3\u00d73 , \n wherein K(i) represents the i th  element of vector K.

Metadata:
- Claim Count in Document: 41.0
- Percentile: 100.0
- Lexical Diversity: 1.76056
- Patent Class: 702.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: False
- Related Applications: ['13885248', '12501587', '10724974', '11251434', '15542931']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.2125355325885067
- 35 USC 102 Novelty (BERT): 0.5400693650061036
- Combined Prediction Score: 0.2452889158302664
- Mean Citation Score: 221.036618
- Max Citation Score: 377.4378
- Similarity Product: 261.4382614821911

Labels:
- Claim Label 101: 1
- Claim Label 102: 0
- Claim Label 103: 1
- Claim Label 112: 1
- Combined Label: 0
- Label 101 Adjusted: 1

Dataset: test