A method for detecting foreign metal objects in the vicinity of an inductive wireless power transfer system is based on combined inductive sensing and thermal sensing. The sensing system senses an object based on an inductive or thermal effect. The sensing system includes a sensing element having an electrical characteristic that changes in the presence of an object based on an inductive effect. The mediating heat-sensitive material has a property that varies with temperature, and changes an electrical characteristic of the sensing element as the property varies. When the foreign matter is heated by a magnetic field generated by the wireless power transfer system, the mediating heat-sensitive material is heated by the foreign matter. The controller measures the electrical characteristic and determines the presence of the object based on a change in the measured electrical characteristic.
一种用于检测电感无线电力传输系统附近的外来金属物体的方法基于组合的电感感测和热感测。感测系统基于电感或热效应来感测物体。感测系统包括感测元件,该感测元件具有基于电感效应在物体存在时改变的电特性。介导热敏材料具有随温度变化的性质,并且随着该性质的变化而改变感测元件的电特性。当异物被由无线电力传输系统生成的磁场加热时,介导热敏材料被异物加热。控制器测量电特性,并且基于所测量的电特性中的变化来确定物体的存在。
Foreign object detection using combined inductive and thermal sensing
使用组合的电感感测和热感测的异物检测
2024-09-13
Patent
Electronic Resource
Chinese
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