Apparatus and method for the contactless detection of vehicles
First Claim
1. A dynamically compensating apparatus for the contactless detection of vehicles comprising one or more magnetometers for measuring the geomagnetic field, said magnetometers fitted either in a carriageway surface or below one or more ceilings of a parking garage by retaining elements, wherein the at least one magnetometer comprises a device for measuring the gravitational field and the apparatus further comprises one or more electronic evaluation modules that are equipped with an integrated circuit, a digital signal processor, a Field Programmable Gate Array or an Application Specific Integrated Circuit, and are connected to or integrated with the at least one magnetometer,wherein the apparatus comprises one or more groups of magnetometers, each group comprising two, three, four or more magnetometers arranged at a distance from one another in a direction of travel that is prescribed by transport engineering,each of the magnetometers comprises at least one magnetic field sensor and at least one gravitation sensor which have been electronically calibrated relative to one another,and a software or firmware program having a geometric algorithm for calculating the vertical and/or horizontal component of the geomagnetic field based on measurements taken at a frequency of a few Hertz to a few tens of thousands of Hertz.
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Accused Products
Abstract
An apparatus and a method for the contactless detection of vehicles via one or more magnetometers for measuring the geomagnetic field, in which at least one magnetometer includes a device for measuring the gravitational field.
21 Citations
27 Claims
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1. A dynamically compensating apparatus for the contactless detection of vehicles comprising one or more magnetometers for measuring the geomagnetic field, said magnetometers fitted either in a carriageway surface or below one or more ceilings of a parking garage by retaining elements, wherein the at least one magnetometer comprises a device for measuring the gravitational field and the apparatus further comprises one or more electronic evaluation modules that are equipped with an integrated circuit, a digital signal processor, a Field Programmable Gate Array or an Application Specific Integrated Circuit, and are connected to or integrated with the at least one magnetometer,
wherein the apparatus comprises one or more groups of magnetometers, each group comprising two, three, four or more magnetometers arranged at a distance from one another in a direction of travel that is prescribed by transport engineering, each of the magnetometers comprises at least one magnetic field sensor and at least one gravitation sensor which have been electronically calibrated relative to one another, and a software or firmware program having a geometric algorithm for calculating the vertical and/or horizontal component of the geomagnetic field based on measurements taken at a frequency of a few Hertz to a few tens of thousands of Hertz.
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17. A dynamically compensating apparatus for the contactless detection of vehicles comprising one or more magnetometers for measuring the geomagnetic field, wherein the at least one magnetometer comprises a device for measuring the gravitational field and the apparatus further comprises one or more electronic evaluation modules that are equipped with an integrated circuit, a digital signal processor, a Field Programmable Gate Array or an Application Specific integrated Circuit, and are connected to or integrated with the at least one magnetometer,
the apparatus comprises one or more groups of magnetometers, each group comprising one, two, three, four or more magnetometers arranged at a distance from one another in a direction of travel that is prescribed by transport engineering, wherein each of the magnetometers comprises three magnetic field sensors that are arranged such that the output signals from the three magnetic field sensors are each proportional to the magnetic field strength in three spatial directions that are not coaxial with respect to one another, and three gravitation sensors that are arranged such that the output signals from the three gravitation sensors are each proportional to the force of gravity in three spatial directions that are not coaxial with respect to one another.
Specification