Door position sensor
First Claim
1. Capacitive sensor system comprising a sensor circuit operationally connected to a first (15) and a second (11) antenna, the first antenna (15) arranged on a first object (10) and the second antenna (11) arranged on a second object (11) movable relative to said first object (10),wherein the first antenna (15) is arranged right next to the second object (11) for the sensor circuit to detect a movement and/or position of the second object (11) and arranged in such a way that a variable capacitance is formed between the first antenna and the second antenna such that a human body movement close to the second antenna has little or no influence on object position measurement results of the sensor circuit,wherein the sensor circuit detects the movement and/or position of the second object (11) by comparing a measured capacitance with a stored relationship between capacitances and a plurality of respective different open positions of the second object (11),wherein the second object (11) is a door rotatably or slideably mounted on the first object (10), and the second antenna (11) is formed as a cover sheet on the door, andwherein the first antenna (15) extends from the first object (10) so as to extend over an end face of the door.
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Accused Products
Abstract
The present invention relates to a capacitive sensor system comprising a sensor circuit connected to a first (15) and a second (11) antenna, the first antenna (15) is arranged on a first object (10) and the second antenna (11) is arranged on a second object (11) movable relative to said first object (10). The first antenna (15) is arranged right next to the second object (11) for the sensor circuit to detect the movement and/or position of the second object (11).
21 Citations
17 Claims
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1. Capacitive sensor system comprising a sensor circuit operationally connected to a first (15) and a second (11) antenna, the first antenna (15) arranged on a first object (10) and the second antenna (11) arranged on a second object (11) movable relative to said first object (10),
wherein the first antenna (15) is arranged right next to the second object (11) for the sensor circuit to detect a movement and/or position of the second object (11) and arranged in such a way that a variable capacitance is formed between the first antenna and the second antenna such that a human body movement close to the second antenna has little or no influence on object position measurement results of the sensor circuit, wherein the sensor circuit detects the movement and/or position of the second object (11) by comparing a measured capacitance with a stored relationship between capacitances and a plurality of respective different open positions of the second object (11), wherein the second object (11) is a door rotatably or slideably mounted on the first object (10), and the second antenna (11) is formed as a cover sheet on the door, and wherein the first antenna (15) extends from the first object (10) so as to extend over an end face of the door.
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16. Method for a capacitive sensor system comprising a sensor circuit operationally connected to a first (15) and a second (11) antenna, the first antenna (15) arranged on a first object (10) and the second antenna (11) arranged on a second object (11) movable relative to said first object (10), the arrangement of antennas forming an equivalent electrical circuit, wherein the sensor circuit detects a position of the second object (11) by measuring a total capacitance (17) in the electrical circuit and comparing it with a stored diagram of a relationship between total capacitance and the position of the second object (11), wherein the first antenna and the second antenna are arranged in such a way that a variable capacitance is formed between the first antenna and the second antenna such that a human body movement close to the second antenna has little or no influence on object position measurement results of the sensor circuit, and wherein said total capacitance includes the variable capacitance formed between the first antenna and the second antenna,
wherein the second object (11) is a door rotatable mounted on the first object (10) and the position of the second object (11) corresponds to a rotation angle of the second object (11) in relation to the first object (10), and wherein the first antenna (15) extends from the first object (10) so as to extend over an end face of the door.
Specification