PATENT CLAIM ANALYSIS

Application Number: 15911274
Application Type: Utility
Filing Date: 2018-03
Publication Date: 2018-09
Patent Classification: ["235", "451000"]

Abstract:
A tag reader includes: a phase calculation section that sequentially calculates a phase of a reception wave; a phase difference calculation section that calculates a phase difference as a difference of phases calculated at two time points; and a tag angle calculation section that calculates a tag angle between a straight line connecting an antenna and the wireless tag and a line on which the wireless tag is moving. The phase difference calculation section calculates two values of the phase difference. The tag angle calculation section calculates a first tag angle and a second tag angle. The tag reader comprises a tag distance calculation section that calculates an antenna-tag minimum distance as a minimum distance from the line to the antenna.

Claim (Index 6):
A tag reader comprising:\n a transmission antenna that transmits a search wave having a preset frequency to a passing determination area of a passage to be determined whether at least one wireless tag is moving on; a first reception antenna and a second reception antenna that are disposed to be distant from each other by one fourth of a wavelength of the search wave or less in a longitudinal direction of the passage so as to receive a response wave transmitted in response to the search wave from the wireless tag located in the passing determination area; a transmission control section that causes the transmission antenna to transmit the search wave at a first time point and then causes the transmission antenna to transmit the search wave at a second time point before the wireless tag has a travel distance reaching or exceeding one fourth of the wavelength of the search wave; a phase acquisition section that acquires phases of the response wave transmitted from the wireless tag in response to the search wave transmitted from the transmission antenna at the first time point and received by the first reception antenna and the second reception antenna, and phases of the response wave transmitted from the wireless tag in response to the search wave transmitted from the transmission antenna at the second time point and received by the first reception antenna and the second reception antenna; a phase correction section that corrects three out of four phases with a remaining one of the phases as a reference phase such that phase differences between the four phases acquired by the phase acquisition section are within a single period of the phase; a distance formula determination section that indicates, in four distance formulae including an identical number of phase periods having an unknown value, a distance between the wireless tag at the first time point and the first reception antenna, a distance between the wireless tag at the first time point and the second reception antenna, a distance between the wireless tag at the second time point and the first reception antenna, and a distance between the wireless tag at the second time point and the second reception antenna, in accordance with corrected phases obtained by correcting the phases by the phase correction section and the reference phase; a height calculation section that calculates a height of each of a first triangle and a second triangle, by substituting the four distance formulae determined by the distance formula determination section in a first triangle relational expression Indicating a relation among three sides and the height of the first triangle defined by a position of the first reception antenna, a position of the second reception antenna, and a position of the wireless tag at the first time point and having a base between the first reception antenna and the second reception antenna and the height from the base to the position of the wireless tag, and in a second triangle relational expression indicating three sides and the height of the second triangle defined by the position of the first reception antenna, the position of the second reception antenna, and a position of the wireless tag at the second time point, and having a base between the first reception antenna and the second reception antenna and the height from the base to the position of the wireless tag; and a passage determination section that determines whether the wireless tag is moving along the passage assuming that the height calculated by the height calculation section is a minimum distance from the tag reader to a route along which the wireless tag is moving.

Metadata:
- Claim Count in Document: 3.0
- Percentile: 90.0
- Lexical Diversity: 2.61224
- Patent Class: 235.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['12602411', '11885973', '12628620', '14131450', '11030877']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.5796945613730997
- 35 USC 102 Novelty (BERT): 0.4766699129246098
- Combined Prediction Score: 0.5693920965282507
- Mean Citation Score: 203.975492
- Max Citation Score: 236.59209
- Similarity Product: 182.6652437529588

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

Dataset: test