The invention relates to a magnetic parking sensor (100), having: a detection device (10) for detecting geomagnetic measured values (M) in the region of a parking space in three coordinates; a first-in-first-out storage device (20), into which the geomagnetic measured values (M) can be loaded; and a determination device (30) which is set up: to depict the X and Y components of the geomagnetic measured values (M) in complex numbers (b), wherein the complex numbers (b) can be determined as a function of the variability (V) of the defined number of geomagnetic measured values (M), and to define a numerical system (b, F) having a defined number of elements (n) corresponding to the variability (V) of the geomagnetic measured value (M) and the complex numbers; and to determine an availability state of the parking space by determining a root [lambda]n of the polynomial: [lambda]3-(2n-1)[lambda]2-(n-1)2[lambda]-(n2+1) with: n... variability of the geomagnetic measured values; [lambda]... auxiliary variable of the numerical theory ('Ito variable') wherein 2xlog([lambda]n)/log (n2+1)>a points to an occupancy state of the parking space and 2*log([lambda]n)/log(n2+1)< indicates a free state of the parking space with: a... defined threshold value.
一种磁停车传感器(100),所述磁停车传感器具有:用于以三个坐标检测停车位区域中的地磁测量值(M)的检测装置(10);先进先出存储装置(20),地磁测量值(M)能够被加载到该先进先出型存储装置中,其中,能够求取先进先出型存储装置(20)中的定义数量的磁测量值(M)的磁可变性(V);求取装置(30),该求取装置设置用于将地磁测量值(M)的x分量和y分量映射成复数(b),其中,所述复数(b)能够根据定义数量的地磁测量值(M)的可变性(V)进行求取,并且该求取装置设置用于定义数制(b,F),该数制具有定义数量的元素(n),所述元素相应于所述地磁测量值(M)的可变性(V)和所述复数;并且该求取装置设置用于通过求取多项式λ3‑(2n‑1)λ2‑(n‑1)2λ‑(n2+1)的根λn来求取停车位的可用性状态,其中,n表示地磁测量值的可变性,λ表示数论辅助变量(“伊藤变量”),其中,2×log(λn)/log(n2+1)>a指示停车位的已占用状态,2×log(λn)/log(n2+1)<a指示停车位的空闲状态,其中,a表示定义的阈值。
MAGNETIC PARKING SENSOR
磁停车传感器
2021-07-23
Patent
Electronic Resource
Chinese
A Parking Vehicle Detection Algorithm Using Magnetic Sensor
Trans Tech Publications | 2013
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