PROBLEM TO BE SOLVED: To provide systems, methods and apparatus for detecting foreign objects.SOLUTION: An apparatus for detecting the presence of an object comprises: a resonant circuit 1200 comprising a sense circuit 1222a-1222d comprising an electrically conductive structure; a coupling circuit (multiplexer 1228) coupled to the sense circuit; and a detection circuit 1230 coupled to the sense circuit via the coupling circuit. The detection circuit is configured to detect the presence of the object in response to detecting a difference between a measured characteristic that depends on a frequency at which the resonant circuit is resonating and a corresponding characteristic that depends on the resonant frequency of the resonant circuit. The coupling circuit is configured to reduce a variation of the resonant frequency by the detection circuit in the absence of the object.SELECTED DRAWING: Figure 12
【課題】外来オブジェクトを検出するためのシステム、方法および装置を提供する。【解決手段】オブジェクトの存在を検出するための装置は、導電性構造を含む感知回路1222a〜1222dを含む共振回路1200と、感知回路に結合された結合回路(マルチプレクサ1228)と、結合回路を介して感知回路に結合された検出回路1230と、を含む。検出回路は、共振回路が共振している周波数に依存する測定された特性と共振回路の共振周波数に依存する対応する特性との間の差を検出したことに応答して、オブジェクトの存在を検出する。結合回路は、オブジェクトがない場合に検出回路による共振周波数の変動を低減する。【選択図】図12
SYSTEMS, METHODS AND APPARATUS FOR DETECTION OF METAL OBJECTS IN PREDETERMINED SPACE
所定の空間における金属オブジェクトの検出のためのシステム、方法、および装置
2018-05-17
Patent
Electronic Resource
Japanese
IPC: | H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / B60M Speiseleitungen oder Vorrichtungen am Gleis für elektrisch angetriebene Fahrzeuge , POWER SUPPLY LINES, OR DEVICES ALONG RAILS, FOR ELECTRICALLY-PROPELLED VEHICLES / G01B MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS , Messen der Länge, der Dicke oder ähnlicher linearer Abmessungen |
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