Method and arrangement for monitoring an object via changes in coupling impedance within a transducer
First Claim
1. A method to monitor localization, posture, movement or properties of one or several objects to be monitored in an environment to be monitored, wherein in the area of the environment to be monitored there is a transducer which is composed of a distribution of conductors, which are electrically insulated from the object and said distribution of conductors includes at least a first division of selectable conductors and a second division of selectable conductors, the method comprising the steps ofa) selecting the conductors of the first division of conductors and conductors of the second division of conductors and connecting an excitation signal to the selected first division of conductors and performing a scanning cycle of the selected divisions of the selected conductors when the excitation signal is connected to the first division of the selected conductors;
- b) deriving a first signal from a coupling of the excitation signal between the first and the second selected divisions of conductors, and processing said first signal to obtain information about impedance of the object for characterization of the object.
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Abstract
A method and an arrangement to monitor localization, movement, and properties of an object, such as human body. An excitation signal is connected to a first division of selected conductors of a transducer which includes a distribution of conductors such as a matrix. A first signal including information about coupling impedance between a first and a second selected division of conductors is derived from a coupling of the excitation signal between the first and the second selected divisions of conductors of said transducer. The object is monitored by studying changes of the coupling impedance caused by the object to be monitored during subsequent repeated cycles of the above mentioned steps.
18 Citations
39 Claims
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1. A method to monitor localization, posture, movement or properties of one or several objects to be monitored in an environment to be monitored, wherein in the area of the environment to be monitored there is a transducer which is composed of a distribution of conductors, which are electrically insulated from the object and said distribution of conductors includes at least a first division of selectable conductors and a second division of selectable conductors, the method comprising the steps of
a) selecting the conductors of the first division of conductors and conductors of the second division of conductors and connecting an excitation signal to the selected first division of conductors and performing a scanning cycle of the selected divisions of the selected conductors when the excitation signal is connected to the first division of the selected conductors; b) deriving a first signal from a coupling of the excitation signal between the first and the second selected divisions of conductors, and processing said first signal to obtain information about impedance of the object for characterization of the object. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 27, 28, 29, 30, 31)
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10. An arrangement to monitor localization, posture, movement or properties of one or several objects to be monitored in an environment to be monitored wherein the arrangement includes:
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a) transducer means which is composed of a distribution of conductors, which are galvanically isolated from the object, the distribution of conductors including at least a first division of selectable conductors and a second division of selectable conductors; b) means to perform a scanning cycle of the second division of selectable conductors; c) means to generate an excitation signal during the scanning cycle; d) means to selectively connect said excitation signal to the first division of selectable conductors of the transducer means; e) means to derive a first signal which is related to a coupling through impedance of the object; and f) means for detecting changes of the impedance of the object to be monitored for obtaining information about characteristic features of the object to be monitored. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 32, 33, 34, 35, 36, 37, 38, 39)
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Specification