Abstract:
A computer-aided communication and navigation system that uses a computer or other processor in wireless communication with Radio Frequency Identification (RFID) tags to aid a blind person. A communication module worn by the user receives information from one or more RFID tags readers and provides audio and, optionally, stimulatory information to the blind person. In one embodiment, a tag reader is provided in a walking cane. In one embodiment, tag readers are provided in one or more ankle bracelets or shoes. In one embodiment, a wireless (or wired) earpiece is provided to provide audio information to one or both ears. In one embodiment, audio information is provided through one or more transducers that couple sound through bones. The use of bone coupling allows the blind person to hear the sound information from the communication module in concert with normal hearing. The tag readers provided to the ankles or shoes communicate with the communication module to allow the blind user to navigate by following a “trail” of RFID tags.
Abstract:
A low cost, robust, repeater for a wireless ambient sensor system that provides an extended period of operability without maintenance is described. The repeater includes a controller and first and second transceivers. The controller is configured to control operation of said first transceiver and said second transceiver. The wireless repeater includes a repeater identification. The controller is configured to manage a sensor unit identification table that contains a list of sensor unit identification codes, where entries for the sensor unit identification table are received by the second transceiver from the base unit and identified by the repeater identification. The controller controls the first transceiver and the second transceiver to forward data from sensor units listed in said sensor unit identification table and to ignore data from sensor units not listed in said sensor unit identification table. The controller also controls the first transceiver and the second transceiver to forward data from the base unit that is addressed to sensor units listed in said sensor unit identification table and to ignore data from the base unit that is addressed to sensor units not listed in said sensor unit identification table. The controller places the first transceiver and the second transceiver in a low-power mode when no transmissions are expected from the base unit or from the sensor units listed in the sensor identification table.
Abstract:
An Electronically-Controlled Register vent (ECRV) that can be easily installed by a homeowner or general handyman is disclosed. The ECRV can be used to convert a non-zoned HVAC system into a zoned system. The ECRV can also be used in connection with a conventional zoned HVAC system to provide additional control and additional zones not provided by the conventional zoned HVAC system. In one embodiment, the ECRV is configured have a size and form-factor that conforms to a standard manually-controlled register vent. In one embodiment, a zone thermostat is configured to provide thermostat information to the ECRV. In one embodiment, the zone thermostat communicates with a central monitoring system that coordinates operation of the heating and cooling zones.
Abstract:
The system and method for detecting water and/or gas leaks by monitoring usage patterns is described. In one embodiment, the existence of a leak is detected by looking for usage patterns wherein water or gas is always being used, at least at a low rate. A leak is indicated if usage does not drop to zero, at least for a period of time, during a given time interval (e.g., during a 24-hour period). The severity of the leak is indicated by the minimum amount of usage during the given time period. In one embodiment, the leak detection system is provided in connection with an Automatic Meter Reading (AMR) system.
Abstract:
A system for load control in an electrical power system is described, wherein one or more load-monitoring devices are provided to control power service delivered to a home or building. A remote power authority, such as a power company, government agency, or power transmission company sends one or more commands to the load-monitoring device to adjust loading on the electrical power system. In one embodiment, the power authority sends shutdown commands. In one embodiment, the power authority sends commands to tell the load-monitoring device to provide reduced power service. In one embodiment, the commands are time-limited, thereby allowing the electric power device system to resume normal operation after a specified period of time. In one embodiment, the commands include query commands to cause the control device to report operating characteristics (e.g., efficiency, time of operation, etc.) back to the power authority.
Abstract:
A system for load control in an electrical power system is described, wherein one or more data interface devices are provided to a cooling system. The data interface devices are configured to receive commands for controlling the cooling system. A remote monitoring system, such as a monitoring system operated by a power company or a power transmission company sends one or more commands to the data interfaced devices to adjust loading on the electrical power system. In one embedment, the monitoring system sends shutdown commands. In one embedment, the monitoring system sends commands to tell a compressor in the cooling system to operate in a relatively low-speed mode. In one embedment, the monitoring system sends tell the compressor and/or the cooling system to operate in a relatively low-power mode. In one embodiment, the commands are time-limited, thereby allowing the cooling system to resume normal operation after a specified period of time. In one embodiment, the commands include query commands to cause the cooling system to report operating characteristics (e.g., efficiency, time of operation, etc.) back to the monitoring center.
Abstract:
A real-time monitoring system that monitors various aspects of the operation of a refrigerant-cycle system is described. In one embodiment, the system includes a processor that measures power provided to the refrigerant-cycle system and that gathers data from one or more sensors and uses the sensor data to calculate a figure of merit related to the efficiency of the system. In one embodiment, the sensors include one or more of the following sensors: a suction line temperature sensor, a suction line pressure sensor, a suction line flow sensor, a hot gas line temperature sensor, a hot gas line pressure sensor, a hot gas line flow sensor, a liquid line temperature sensor, a liquid line pressure sensor, a liquid line flow sensor. In one embodiment, the sensors include one or more of an evaporator air temperature input sensor, an evaporator air temperature output sensor, an evaporator air flow sensor, an evaporator air humidity sensor, and a differential pressure sensor. In one embodiment, the sensors include one or more of a condenser air temperature input sensor, a condenser air temperature output sensor, and a condenser air flow sensor, an evaporator air humidity sensor. In one embodiment, the sensors include one or more of an ambient air sensor and an ambient humidity sensor.
Abstract:
A real-time monitoring system that monitors various aspects of the operation of a refrigerant-cycle system is described. In one embodiment, the system includes a processor that measures power provided to the refrigerant-cycle system and that gathers data from one or more sensors and uses the sensor data to calculate a figure of merit related to the efficiency of the system. In one embodiment, the sensors include one or more of the following sensors: a suction line temperature sensor, a suction line pressure sensor, a suction line flow sensor, a hot gas line temperature sensor, a hot gas line pressure sensor, a hot gas line flow sensor, a liquid line temperature sensor, a liquid line pressure sensor, a liquid line flow sensor. In one embodiment, the sensors include one or more of an evaporator air temperature input sensor, an evaporator air temperature output sensor, an evaporator air flow sensor, an evaporator air humidity sensor, and a differential pressure sensor. In one embodiment, the sensors include one or more of a condenser air temperature input sensor, a condenser air temperature output sensor, and a condenser air flow sensor, an evaporator air humidity sensor. In one embodiment, the sensors include one or more of an ambient air sensor and an ambient humidity sensor.