摘要:
An exemplary security device includes a reader configured to read information stored on a credential device. The reader enters a sleep mode when not reading a credential device. A wake-up module includes an inductively coupled resonant circuit. The wake-up module is configured to detect a credential device near the reader if the credential device has a resonant frequency corresponding to a frequency of an electromagnetic field of the inductively coupled resonant circuit that is controlled by a stable oscillator. The wake-up module is configured to provide an indication to wake-up the reader from the sleep mode responsive to detecting a change in power of the electromagnetic field caused by the credential device.
摘要:
An exemplary security device includes a reader configured to read information stored on a credential device. The reader enters a sleep mode when not reading a credential device. A wake-up module includes an inductively coupled resonant circuit. The wake-up module is configured to detect a credential device near the reader if the credential device has a resonant frequency corresponding to a frequency of an electromagnetic field of the inductively coupled resonant circuit that is controlled by a stable oscillator. The wake-up module is configured to provide an indication to wake-up the reader from the sleep mode responsive to detecting a change in power of the electromagnetic field caused by the credential device.
摘要:
An apparatus for detecting an object 20 in an area adjacent a doorway includes a plurality of transducers US1, US2 mounted proximate the doorway and a processor 40. At least one of the transducers US1 is positioned to repeatedly transmit signals T1 toward an area adjacent the doorway. At least two of the transducers US1, US2 are positioned to repeatedly receive R1, R2 return signals. The processor 40 is operably connected to the plurality of transducers for detecting, in the area adjacent the doorway, an object 20 by determining the object's: position based upon one or more determined distances d1, d2 derived from times between transmission of signals and reception of corresponding return signals; and/or movement based upon transmission of signals and Doppler shift in the reception of corresponding return signals.
摘要:
An elevator system has on each floor hall call buttons that are inter-connected with piconet modules (15), such as modules conforming to BLUETOOTH™ specifications; similar piconet modules (16) may be associated with hall fixtures such as lanterns and gongs; similar piconet modules (50) may be associated with hoistway doors, on each floor, so as to form a wireless communication system with a similar piconet module (19) at the controller (18); and a piconet module (40) may be associated with the car operating panel. A module (43) may be interconnected with the car door lock switch; a module (44) may be interconnected with a safety switch; modules (48) and (49) may be interconnected with lower and upper limit switches; and a module (49) may be interconnected with an overspeed detector, so as to form a safety chain. A prospective passenger (53) may carry a portable device with a piconet module (54) to request elevator service and receive acknowledgment, and maintenance personnel (58) may use a personal ditigal assistant having a piconet module (58) therein to acquire current and historical information about the elevator and to issue executable commands to the elevator system.
摘要:
An apparatus for detecting an object 20 in an area adjacent a doorway includes a plurality of transducers US1, US2 mounted proximate the doorway and a processor 40. At least one of the transducers US1 is positioned to repeatedly transmit signals T1 toward an area adjacent the doorway. At least two of the transducers US1, US2 are positioned to repeatedly receive R1, R2 return signals. The processor 40 is operably connected to the plurality of transducers for detecting, in the area adjacent the doorway, an object 20 by determining the object's: position based upon one or more determined distances d1, d2 derived from times between transmission of signals and reception of corresponding return signals; and/or movement based upon transmission of signals and Doppler shift in the reception of corresponding return signals.
摘要:
An elevator system has on each floor hall call buttons that are inter-connected with piconet modules (15), such as modules conforming to BLUETOOTH™ specifications; similar piconet modules (16) may be associated with hall fixtures such as lanterns and gongs; similar piconet modules (50) may be associated with hoistway doors, on each floor, so as to form a wireless communication system with a similar piconet module (19) at the controller (18); and a piconet module (40) may be associated with the car operating panel. A module (43) may be interconnected with the car door lock switch; a module (44) may be interconnected with a safety switch; modules (48) and (49) may be interconnected with lower and upper limit switches; and a module (49) may be interconnected with an overspeed detector, so as to form a safety chain. A prospective passenger (53) may carry a portable device with a piconet module (54) to request elevator service and receive acknowledgment, and maintenance personnel (58) may use a personal ditigal assistant having a piconet module (58) therein to acquire current and historical information about the elevator and to issue executable commands to the elevator system.
摘要:
An elevator safety chain includes a plurality of passive radio frequency identification devices (RFIDs) (15-18, 22, 34-36 and 63), which are associated, respectively, with hoistway door locks, upper hoistway limits, lower hoistway limits, overspeed detection, car door lock, emergency stop switch, and inspection switch. RFlDs may be associated with car the call buttons (34) and/or hall call buttons (14, 19). The RFIDs may have a switch (43, 44) in the frequency-determining circuitry (40, 41) which defeats the RFID's ability to respond, or a switch (48) which alters the responding frequency. The RFIDs may sense safe or unsafe conditions, or call requests, by either the presence of absence, or vice versa, of adjacent magnetic reluctance (51, 62, 71).
摘要:
A communication system includes a first communication module within a rotating frame of reference and a second communication module within a fixed frame of reference. The first communication module and the second communication module in wireless communication at least partially through a hollow shaft.
摘要:
A door security system comprises a door, and a handle assembly attached to the door. The handle assembly includes a lock mechanism, a handle, and an escutcheon. The lock mechanism has an unlocked state and a locked state for securing access to the door, and the handle is rotatably supported by the handle assembly as a means of access through the door when the lock mechanism is in the unlocked state. At least one of the handle and the escutcheon acts as an antenna capable of wirelessly receiving and transmitting radio frequency signals and capable of communicating with the lock mechanism to switch the lock mechanism between the unlocked and locked state.
摘要:
A power management circuit decreases power consumption in an electronic door lock. The power management circuit includes an ON/OFF circuit, a load switch circuit and a electronic door lock circuit. The ON/OFF circuit generates an initial enable signal in response to a detected keycard that places the load switch circuit in an enabled state. When enabled, the load switch circuit provides dc power to the electronic door lock circuit that allows the electronic door lock circuit to receive identification input from the detected keycard and determine whether an output should be generated to actuate the door lock mechanism. Having completed the keycard detection operation, the electronic door lock circuit generates a self turn-off signal that is provided as feedback to the ON/OFF circuit to disable the load switch circuit. When disabled, the load switch circuit prevents any power from being provided to the electronic door lock circuit and thereby conserves energy otherwise consumed by the electronic door lock in times between activations.