Remote sensor, device and method for activating selected remote sensor components
First Claim
1. A remote identifier (2) that can be attached to products, which includes a microcircuit (7), in which there is a memory and means for processing a radio-frequency signal and an antenna (6) connected to the microcircuit (7), by means of which both the signal and also electric power for the operating voltage of the microcircuit (7) can be received, characterized in that a component (3), the electrical properties of which change due to the effect of infrared, or visible light, is electrically connected to the microcircuit (7) of the remote identifier and there are means in the microcircuit (7), by which the combined effect of a change in the radio-frequency signal and the electrical component (3) can be expressed by a correlation method for the signals, in order to activate the remote identifier (2) for two-way data transmission.
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Accused Products
Abstract
This publication discloses a remote identifier, a reader, and a method for activating a desired remote identifier. The remote identifier (2) includes a microcircuit (7), in which there is a memory and means for processing a radio-frequency signal, an antenna (6) connected to the microcircuit (7), by means of which both the signal and also electric power for the operating voltage of the microcircuit (7) can be received. According to the invention, a component (3), the electrical properties of which change due to the effect of infrared, or visible light, is electrically connected to the microcircuit (7) of the remote identifier and in the microcircuit (7) there are means, by which the combined effect of a change in the radio-frequency signal and the electrical component (3) can be expressed by a correlation method for the signals, in order to activate the remote identifier (2) for two-way data transmission.
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Citations
8 Claims
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1. A remote identifier (2) that can be attached to products, which includes
a microcircuit (7), in which there is a memory and means for processing a radio-frequency signal and an antenna (6) connected to the microcircuit (7), by means of which both the signal and also electric power for the operating voltage of the microcircuit (7) can be received, characterized in that a component (3), the electrical properties of which change due to the effect of infrared, or visible light, is electrically connected to the microcircuit (7) of the remote identifier and there are means in the microcircuit (7), by which the combined effect of a change in the radio-frequency signal and the electrical component (3) can be expressed by a correlation method for the signals, in order to activate the remote identifier (2) for two-way data transmission.
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3. A reader for reading the remote identifier (2), which reader includes
means for transmitting and receiving a radio-frequency signal to and from the remote identifier (2), characterized in that the reader (1) includes a light source (10), and control means (11) for a light source (10), by means of which the signal of the light source can be synchronized with a radio-frequency signal.
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5. A method in a reader (1) of remote identifiers, in which reader information is sent to the remote identifier (2) and information is received from the remote identifier (2), characterized in that a signal in the infrared or visible light range, which is synchronized with the radio-frequency signal, is sent to the remote identifier simultaneously with the radio-frequency signal.
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6. A remote-identifier system, which includes
a reader (1), in which there are means for radio-frequency transmission and reception, a remote identifier (2), in which there are means for radio-frequency two-way communication with the reader (1) and means for exploiting the energy radiated by the reader as its own operating voltage, characterized in that the reader (1) includes a light source (10) operating in the infrared or visible light range and control means (11) for controlling the light source in synchronization with a radio-frequency signal, and the remote identifier (2) includes means (3) for detecting the simultaneous presence of a light signal and a radio-frequency signal.
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7. A remote-identifier method, in which
radio-frequency information and electrical power is sent to the remote identifier, with the aid of the reader (1), the remote identifier (2) is used to receive and transmit radio-frequency information using a radio-frequency signal as operating energy, characterized in that the reader (1) is used to transmit radiation in the infrared or visible-light ranges, in synchronization with the radio frequency, and the remote identifier (2) is used to detect the simultaneous presence of a light signal and a radio-frequency signal.
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8. A method in a remote-identifier reader (1), in which reader information is transmitted to the remote identifier (2) and information is received from the remote identifier (2), characterized in that the transmission power of the reader (1) is reduced to such a level that the reader (1) is able to read only in the immediate vicinity of a remote identifier (2).
Specification