Method and device for detecting a conductive object
First Claim
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1. A method for detecting an electrically and/or magnetically conductive object in surroundings of a sensor head of a device, the method comprising the following steps:
- emitting a transmitting signal into the surroundings;
receiving a received signal as a function of the transmitting signal and characteristics of the object and the surroundings;
analyzing a response signal formed from the received signal;
the detection being controlled by;
providing a class system having a plurality of classes differing from one another in at least one object and/or surroundings characteristic;
classifying instantaneous object and/or surroundings characteristics as a function of the analyzed response signal into one of the classes of the class system, the one class defining a classified class; and
detecting a further response signal using predefined detection characteristics preset in the classified class;
wherein the classes have one or multiple of the classes from the group consisting of;
a first class provided for gratings;
a second class provided for dense objects, in particular with little overlap;
a third class provided for deep objects;
a fourth class provided for magnetic substrates;
a fifth class provided for a certain movement direction; and
a sixth class provided for nonmagnetic, conductive objects.
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Abstract
A method for detecting an electrically and/or magnetically conductive object in a vicinity of a sensor head of a device, having the following steps:
- emitting a transmitting signal into the surroundings,
- receiving a received signal as a function of the transmitting signal and the characteristics of the object and the surroundings,
- analyzing a response signal formed from the received signal.
According to the invention, the detection is controlled by
- providing a class system having a number of classes, which differ from one another in at least one object and/or surroundings characteristic, and
- classifying instantaneous object and/or surroundings characteristics as a function of the analyzed response signal in a class of the class system, and
- predefining detection characteristics which are preset in the classified class, a further response signal being detected using the predefined detection characteristics.
10 Citations
22 Claims
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1. A method for detecting an electrically and/or magnetically conductive object in surroundings of a sensor head of a device, the method comprising the following steps:
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emitting a transmitting signal into the surroundings; receiving a received signal as a function of the transmitting signal and characteristics of the object and the surroundings; analyzing a response signal formed from the received signal; the detection being controlled by; providing a class system having a plurality of classes differing from one another in at least one object and/or surroundings characteristic; classifying instantaneous object and/or surroundings characteristics as a function of the analyzed response signal into one of the classes of the class system, the one class defining a classified class; and detecting a further response signal using predefined detection characteristics preset in the classified class; wherein the classes have one or multiple of the classes from the group consisting of; a first class provided for gratings; a second class provided for dense objects, in particular with little overlap; a third class provided for deep objects; a fourth class provided for magnetic substrates; a fifth class provided for a certain movement direction; and a sixth class provided for nonmagnetic, conductive objects. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A device for detecting an electrically and/or magnetically conductive object in surroundings of a sensor head of the device, comprising:
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a transmitter unit having at least one transmitter and designed to emit a transmitting signal into the surroundings; a receiver unit having at least one receiver and designed to receive a received signal as a function of the transmitting signal and characteristics of the object and the surroundings; a control and evaluation unit designed to control the transmitting and receiver units and to analyze a response signal formed by the receiver unit from the received signal; a classification unit using a class system, object and/or surroundings characteristics being classified in classes of the class system, the class system having a plurality of classes differing from one another in at least one object and/or surroundings characteristic, preset detection characteristics for the device being assigned to one class wherein the classes have one or multiple of the classes from the group consisting of; a first class provided for gratings; a second class provided for dense objects, in particular with little overlap; a third class provided for deep objects; a fourth class provided for magnetic substrates; a fifth class provided for a certain movement direction; and a sixth class provided for nonmagnetic, conductive objects. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification