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Magnetic parking sensor

A sensor and parking space technology, applied in the field of calculating the availability of parking spaces, manufacturing magnetic parking sensors, and computer program products, can solve the problems of manufacturing cost and maintenance cost constraints, and achieve the effect of long running time and high detection accuracy

Pending Publication Date: 2021-07-23
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reduction of parking spaces has increasingly led to the development of fully automated and mechanical parking systems, however, where these systems are also limited due to their manufacturing and maintenance costs

Method used

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Embodiment Construction

[0040] The core idea of ​​the present invention is especially to propose a low-cost magnetic parking sensor based on magnetic signal analysis.

[0041] figure 1 The ideal time course of the signal S of a magnetic parking sensor (not shown) is shown. It can be seen that the signal S is ideally rectangular, wherein the upper value of the rectangular signal represents the occupied state of the parking space, and the lower value of the rectangular signal represents the free state of the parking space. Obviously, the assignments mentioned can also be reversed (ie upper values ​​correspond to idle states, lower values ​​correspond to occupied states, not shown). In this case, the variability of the signal S is 1.

[0042] In contrast, figure 2 The actual time course of the signal S of the magnetic parking sensor is shown. It can be seen that the signal is essentially strongly oscillating but has a rectangular component, which is caused, for example, by geomagnetic influences, e...

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PUM

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Abstract

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.

Description

technical field [0001] The invention relates to a magnetic parking sensor. The invention also relates to a method for producing a magnetic parking sensor. The invention also relates to a method for ascertaining the availability status of a parking space. The invention also relates to a computer program product. Background technique [0002] In terms of vehicular traffic, parking is a major issue that has a significant impact on traffic congestion and urban landscapes. The reduction of parking spaces has increasingly led to the development of fully automated and mechanical parking systems, wherein these systems are also limited by their manufacturing and maintenance costs. [0003] Magnetic signal strength analysis in the context of APLM (English: automated parking lots management) is a highly nonlinear problem and can be approximated by adaptive structures based on reference measurements. [0004] "Generalized number systems in Euclidean spaces" by Katai I. (Math, and Co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/02G01V3/08G08G1/14G01R33/00
CPCG08G1/141G01V3/081G01R33/0029G01R33/0206
Inventor P·鲍库茨
Owner ROBERT BOSCH GMBH
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