Abstract: Example wireless power transfer systems and methods are described. In one implementation, an electronic control module is configured to generate a signal to be communicated to a transmitter coil. A driver module configured to receive the signal and compensate for any degradation in signal quality is electrically coupled to the electronic control module. The driver module is further coupled to the transmitter coil. A receiver coil, wirelessly electrically coupled to the transmitter coil, is configured to receive a wireless charging signal from the transmitter coil. The implementation also includes an electronic lock module electrically coupled to the receiver coil. The electronic lock module receives the wireless charging signal from the receiver coil and uses the wireless charging signal to charge a rechargeable battery electrically coupled to the electronic lock module.

Abstract: A wirelessly charged battery powered electronic door locking system utilizes a first radio frequency to wirelessly transmit a wireless charging signal from an electronic control module to an electronic lock module mounted with the door. A rechargeable battery associated with the electronic lock module powers the electronic lock module and is recharged thereby. An RFID reader may be coupled to the electronic lock module, powered by the battery and mounted with the door.

Abstract: A wirelessly charged battery powered electronic door locking system utilizes a first radio frequency to wirelessly transmit a wireless charging signal from an electronic control module to an electronic lock module mounted with the door. A rechargeable battery associated with the electronic lock module powers the electronic lock module and is recharged thereby. An RFID reader may be coupled to the electronic lock module, powered by the battery and mounted with the door.

Abstract: Example wireless power transfer systems and methods are described. In one implementation, a rechargeable battery is electrically coupled to an electronic lock module. An electronic control module that is physically separate from the electronic lock module generates a wireless charging link between the electronic control module and the electronic lock module. The electronic control module transmits a charging signal to the electronic lock module via the wireless charging link, and the electronic lock module uses this charging signal to charge the rechargeable battery. The transmission frequency of the charging signal can be varied over a predetermined frequency range by a numerically controlled oscillator.

Abstract: Example systems and methods are described that wirelessly charge a rechargeable battery associated with a lock. In one implementation, a rechargeable battery is electrically coupled to an electronic lock module associated with a door corresponding to a door frame. An electronic control module associated with the door frame and physically separate from the electronic lock module generates a wireless charging link between the electronic control module and the electronic lock module. The electronic control module transmits a charging signal to the electronic lock module via the wireless charging link, and the electronic lock module uses this charging signal to charge the rechargeable battery. The implementation also includes a lock associated with the door that can be locked or unlocked by the electronic lock module.

Abstract: Example systems and methods are described that wirelessly charge a rechargeable battery associated with a lock. In one implementation, a rechargeable battery is electrically coupled to an electronic lock module associated with a door corresponding to a door frame. An electronic control module associated with the door frame and physically separate from the electronic lock module generates a wireless charging link between the electronic control module and the electronic lock module. The electronic control module transmits a charging signal to the electronic lock module via the wireless charging link, and the electronic lock module uses this charging signal to charge the rechargeable battery. The implementation also includes a lock associated with the door that can be locked or unlocked by the electronic lock module.

Abstract: Example wireless power transfer systems and methods are described. In one implementation, an electronic control module is configured to generate a signal to be communicated to a transmitter coil. A driver module configured to receive the signal and compensate for any degradation in signal quality is electrically coupled to the electronic control module. The driver module is further coupled to the transmitter coil. A receiver coil, wirelessly electrically coupled to the transmitter coil, is configured to receive a wireless charging signal from the transmitter coil. The implementation also includes an electronic lock module electrically coupled to the receiver coil. The electronic lock module receives the wireless charging signal from the receiver coil and uses the wireless charging signal to charge a rechargeable battery electrically coupled to the electronic lock module.

Abstract: Example wireless power transfer systems and methods are described. In one implementation, a rechargeable battery is electrically coupled to an electronic lock module. An electronic control module that is physically separate from the electronic lock module generates a wireless charging link between the electronic control module and the electronic lock module. The electronic control module transmits a charging signal to the electronic lock module via the wireless charging link, and the electronic lock module uses this charging signal to charge the rechargeable battery. The transmission frequency of the charging signal can be varied over a predetermined frequency range by a numerically controlled oscillator.

Abstract: Example systems and methods are described that wirelessly charge a rechargeable battery associated with a lock. In one implementation, a rechargeable battery is electrically coupled to an electronic lock module associated with a door corresponding to a door frame. An electronic control module associated with the door frame and physically separate from the electronic lock module generates a wireless charging link between the electronic control module and the electronic lock module. The electronic control module transmits a charging signal to the electronic lock module via the wireless charging link, and the electronic lock module uses this charging signal to charge the rechargeable battery. The implementation also includes a lock associated with the door that can be locked or unlocked by the electronic lock module.

Abstract: Power consumption management for a radio frequency identification (RFID) reader for a radio frequency (RF) transponder system. The RF system includes an RFID device and a host. The RFID reader includes an RFID controller, an excitation signal transmitter, a response signal receiver, an optional RFID device detector, a host interface input/output, and a user interface. The method includes establishing a first power consumption level for the RFID reader, establishing a second power consumption level that is different from the first, and changing between the first level and the second level. The difference between the first level and the second level is derived from at least one technique for power consumption management. A plurality of techniques are presented. Among the potential benefits to reduced power consumption are increased energy efficiency and reduced radiated emissions.

Abstract: A method, apparatus and system for radio frequency identification provides a modulated illumination signal containing a sequence of bits configured to illuminate a radio frequency identification (RFID) tag, The illumination signal is received at the RFID tag, rectified to generate a wake signal for waking a processor which is subsequently powered by a battery. The received illumination signal is sampled and subjected to a thresholding process. Mobile telephone band interference is countered by correlating the sampled illumination signal to determine its bit sequence and then correlating the bit sequence against a predetermined key. An identification signal from the RFID tag is sent in response to a match.

Abstract: A method, apparatus and system for radio frequency identification provides an on-off keyed amplitude-modulated illumination signal containing a sequence of bits configured to illuminate a radio frequency identification (RFID) tag, The illumination signal is received at the RFID tag, rectified to generate a wake signal for waking a processor which is subsequently powered by a battery. The received illumination signal is sampled and subjected to a thresholding process. Mobile telephone band interference is countered by correlating the sampled illumination signal to determine its bit sequence and then correlating the bit sequence against a predetermined key. An identification signal from the RFID tag is sent in response to a match.

Abstract: A method, apparatus and system for radio frequency identification provides an on-off keyed amplitude-modulated illumination signal containing a sequence of bits configured to illuminate a radio frequency identification (RFID) tag, The illumination signal is received at the RFID tag, rectified to generate a wake signal for waking a processor which is subsequently powered by a battery. The received illumination signal is sampled and subjected to a thresholding process. Mobile telephone band interference is countered by correlating the sampled illumination signal to determine its bit sequence and then correlating the bit sequence against a predetermined key. An identification signal from the RFID tag is sent in response to a match.

Abstract: A portable communication device uses a first electrostatic antenna element and a second electrostatic antenna element and circuitry which is coupled to the first antenna element and to the second antenna element and which derives operating power from an electrostatic field in the vicinity of the first and second antenna elements. The electrostatic field may be provided by an array of exciter elements containing both horizontal and vertical exciter elements so that at some point as a communication device is moved across the exciter antenna array, the device will have sufficient power coupled to it to power up and become operational.

Abstract: A reader for radio frequency identification tags having at least one magnetic field transmitting and receiving coil which is oriented in a given plane and which is responsive to a received magnetic exciter field of a first frequency to produce and radiate an identifying magnetic field comprised of a carrier at a second different frequency modulated by an identifying code.

Abstract: Apparatus for selectively reading or writing data on a magnetic data stripe on a data card which is thin and flexible and for selectively returning or capturing the card. The apparatus includes a card guide arrangement comprising a cylindrical card guide path section, an entrance card path section with an entrance slit for admitting the data card, and an exit path section with an exit slit for discharging the data card for capture. A drive arrangement drives the data card through the entrance slit, throughout the cylindrical card guide path section, and through the exit slit. A transducer with a read head and write head is mounted relative to the cylindrical card guide path section. A position tracking arrangement determines the position of the data card within the cylindrical card guide and a card-in sensor senses the presence of a data card in the entrance path section. A microprocessor based control circuit is used to operate the system and control operational features.

Abstract: A proximity detection system which combines the advantages of an electrostatic (electric) field coupling mechanism with those of an electromagnetic coupling mechanism in order to overcome the disadvantages of the respective individual coupling mechanisms. The system includes a coded tag which is excited with an induction field, i.e., by using an electromagnetic coupling mechanism as has been done in the past in such proximity identification systems, but which transmits stored data back to the receiver using both an electric field coupling mechanism and an electromagnetic field coupling mechanism. The receiver, in turn, is provided with a novel preamplifier circuit arrangement, so that it can simultaneously receive signals via either or both of these coupling mechanisms.

Abstract: A remotely powered portable member having circuitry for storing and transmitting coded information. A first coupling device is provided for receiving a signal transmitted via one of a magnetic field and an electric field. A power circuit is connected to the first coupling device for deriving operating power from the received signal for use by the circuitry. A second coupling device is connected to the circuitry for transmitting coded information stored by the circuitry via the other one of the magnetic field and electric field.

Abstract: A quasi-stationary electric field is produced by means of an oscillator whose output is connected to a field wire which is positioned within the area to be protected and the electric field is detected by an antenna whose output is connected to an amplifier. An AM detector is connected to the output of the amplifier and the output of the AM detector is connected via a lowpass filter to a high gain amplifying means including a bandpass filter arrangement so that at the output of this high gain amplifier only signals within the relatively low frequency range associated with movement of an intruder are present. The output signal from the high gain amplifier is fed to a threshold circuit which produces an output signal whenever the input signal thereto exceeds a predetermined threshold value, and this output signal is fed to an alarm producing circuit. The frequency of the electric field is in the range from about 1 to 40KHz and is approximately midway between two successive harmonics of the frequency of the a.c.

Abstract: A motion detection apparatus indicates the presence of an object in a given area by sensing the change in electrostatic charge in the area caused by the disturbance of the electric field within the range of the apparatus. An antenna, which may take a number of different forms, is placed at a convenient location within the area to be monitored, and the output of the antenna is connected in a shielded manner to the input of a shielded high gain amplifier with a very high impedance-low leakage current input stage and which has a filter connected thereto having a cut off frequency of up to approximately 20Hz. Connected to the output of the amplifier is a circuit, which may include a power line frequency filter, which produces an output signal, for example, an alarm, whenever the amplitude of the output signal from the amplifier exceeds a predetermined value.