Abstract: A touchless motion sensor system for performing directional motion detection includes first and second touchless motion sensors. First and second sensing units are coupled to the first and second touchless motion sensors each having a sensing unit disable input, a sensing unit disable output, a sensing unit to sensing unit motion detected output, and motion logic. The first sensing unit disable output is coupled to the second sensing unit disable input, and the second sensing unit disable output is coupled to the first sensing unit disable input.

Abstract: A touchless motion sensor system for performing directional motion detection includes first and second touchless motion sensors. First and second sensing units are coupled to the first and second touchless motion sensors each having a sensing unit disable input, a sensing unit disable output, a sensing unit to sensing unit motion detected output, and motion logic. The first sensing unit disable output is coupled to the second sensing unit disable input, and the second sensing unit disable output is coupled to the first sensing unit disable input.

Abstract: A system for operating a radio frequency identification (RFID) system includes a remotely operable access point at an authentication point. A first trigger sensor detects an RFID signal from an RFID device associated with a user at a first trigger distance from the authentication point. A controller responsive to a signal detected from the RFID device exchanges data with the RFID device and determines whether the RFID device is authorized. A second trigger sensor exchanges data with the RFID device at a second trigger distance closer to the authentication point than the first trigger distance. The controller is responsive to the RFID signal detected at the second trigger sensor to authenticate the RFID device at the authentication point.

Abstract: A system for operating a radio frequency identification (RFID) system includes a remotely operable access point at an authentication point. A first trigger sensor detects an RFID signal from an RFID device associated with a user at a first trigger distance from the authentication point. A controller responsive to a signal detected from the RFID device exchanges data with the RFID device and determines whether the RFID device is authorized. A second trigger sensor exchanges data with the RFID device at a second trigger distance closer to the authentication point than the first trigger distance. The controller is responsive to the RFID signal detected at the second trigger sensor to authenticate the RFID device at the authentication point.

Abstract: An antenna mounting system includes a metal plate having a void formed therein and one or more continuous slots extending from the void to an edge of the metal plate. An antenna is mounted inside the void.

Abstract: A method of testing a circuit assembly that includes a piezoelectric switch may include driving a DC current into the piezoelectric switch. The method may further include measuring the time interval it takes to develop a predetermined voltage across the piezoelectric switch and comparing the measured time interval with a first predetermined time interval and a second predetermined time interval. The method may include identifying the circuit assembly as defective when the measured time interval is either less than the first predetermined time interval or more than the second predetermined time interval, and otherwise identifying the circuit assembly is operational.

Abstract: An antenna mounting system includes a metal plate having a void formed therein and one or more continuous slots extending from the void to an edge of the metal plate. An antenna is mounted inside the void.

Abstract: A keypad unit for an access system including an outer housing having an integral bezel. A carrier is mounted within the housing, and an overlay including key zones is mounted to the carrier. A PCB assembly is suspended within the carrier by a non-compressive, but compliant encapsulating compound. The PCB assembly includes a foam layer sandwiched between a top PCB and a bottom PCB. LEDs are electrically coupled to a top surface of the top PCB. Piezoelectric transducers are mounted to the top PCB and are backed by the foam layer. The carrier may include carrier projections are in register with the key zones on the overlay and the transducers. When an operator pushes a key zone, the corresponding projection transmits the force via the carrier and the encapsulating compound to the carrier adjacent the corresponding transducer causing it to generate a voltage indicative of the pressure zone at which the force was applied.

Abstract: A weatherproof electronic keypad includes a molded plastic housing, a plurality of transducers attached to the inside surface of the front wall of the housing, an electronic circuit mounted within the housing and connected to the transducers, and a graphics overlay removably affixed to the outside surface of the front wall of the housing. The front wall and overlay are sufficiently flexible that finger pressure applied to the overlay results in enough deformation of the front wall to activate the transducer underlying that portion of the inside surface. The overlay contains indicia which identify the location and function of the transducers. The overlay need not be attached to the housing as a part of manufacturing the keypad, but rather can be added in situ as part of installation of the keypad. This enables customized selection of a particular overlay in accordance with aesthetic and/or functional considerations, as well as replacement of the overlay in the field if necessary.

Abstract: An electronic switch is disclosed using a piezoelectric push button transducer and an electronic switching circuit. The push button piezoelectric transducer is connected with the switching circuit with a polarity to provide a switching voltage in response to actuation of the push button switch by finger pressure. The connection is such that the polarity of the voltage generated as a result of differential thermal expansion of the piezoelectric transducer is opposite that produced by finger pressure on the push button switch and does not produce false switching from fast temperature rise. In order to protect against false switching due to high temperature soak of the electronic switch, a thermistor is provided in the electronic switching circuit.