Abstract: An audio beam forming and signal processing system includes at least one image capture device, an array of audio sensors, and a controller. The at least one image capture device is configured to capture images of a monitored zone. The array of audio sensors is configured to detect audio signals from one or more audio sources within the monitored zone. The controller is configured to: analyze at least one image captured by the image capture device to identify an audio source within the monitored zone; determine two or fewer audio source location parameters indicative of the location of the audio source in the monitored zone; and cause the array of audio sensors to form an audio beam directed at the audio source based on the two or fewer audio source location parameters.

Abstract: A modular fan housing configured to hold an array of motors and fans is provided. The modular fan housing is configured for use in an air-handling system that delivers air to a ventilation system for at least a portion of a building. The fan housing comprises a plurality of modular units configured to be stacked adjacent to one another in at least one row or column to form an array. The modular units each include an interior surface and have a front end and a back end that define a chamber. The chambers are configured to receive the motors and fans. Sound attenuation layers extend along at least a portion of the interior surface of the corresponding chambers. The sound attenuation layers are positioned between at least some of the adjacent chambers.

Abstract: Embodiments of the present disclosure provide a system and method for providing conditioned air to at least one enclosed structure. The system may include at least one conditioning module configured to provide conditioned air to the at least one enclosed structure. The conditioning module(s) may include a conditioning energy exchanger. The conditioning module(s) is configured to circulate desiccant through a desiccant circuit to condition air passing through the conditioning energy exchanger. The conditioning module(s) may be configured to receive at least one of concentrated desiccant or diluted desiccant in order to vary temperature or concentration of the desiccant circulating through the desiccant circuit.

Abstract: A method for charging a field refrigeration system including an evaporator, a condenser, a compressor, and an expansion device includes calculating a field subcooling of the field refrigeration system as a function of a measured field liquid line pressure and a measured field liquid line temperature. A charge adjustment percentage can be calculated as a function of the field subcooling, a measured field indoor wet bulb temperature, and a measured field outdoor dry bulb temperature. A refrigerant adjustment weight can be determined based on the charge adjustment percentage. A field refrigeration system charge can be adjusted by the refrigerant adjustment weight.

Abstract: A method for charging a field refrigeration system including an evaporator, a condenser, a compressor, and an expansion device includes calculating a target superheat as a function of one or more of a measured field outdoor dry bulb temperature, and a measured field indoor wet bulb temperature. A charge adjustment percentage can be calculated as a function of the target superheat. A refrigerant adjustment weight can be determined based on the charge adjustment percentage. A field refrigeration system charge can be adjusted by the refrigerant adjustment weight.

Abstract: An adjustable security sensor device is described. The device comprises a time of flight sensor, a user input element, and a processor. The time of flight sensor generates a first set of sample distance measurements based on a first position of the time of flight sensor relative to the reflector, in response to receiving the identification of the first position of the device relative to the reflector. The processor associates the identification of the first position with the first set of sample distance measurements. A second set of sample distance measurements is measured based on a second position of the time of flight sensor relative to the reflector. The processor compares a first range of the first set of sample distance measurements with a second range of the second set of sample distance measurements, and identifies a position of the device relative to the reflector based on the comparison.

Abstract: A modular air-handling plenum for capable of supporting surgical apparatus or other objects is disclosed. The plenum is usually rectangular, may be formed of sheet metal, and features a truss spanning the width of the plenum to carry the weight of the apparatus. The plenum itself is attached to the ceiling of a room. An air handling component may be included to provide filtered and/or conditioned air in the vicinity of the suspended apparatus, or the plenum may be used strictly as an apparatus support, with no air-conditioning function. An ordinary suspended ceiling may also be mounted in the plenum for continuity with the remainder of the room.

Abstract: A method of forming a membrane panel configured to be secured within an energy exchange assembly may include forming an outer frame defining a central opening, and integrating a membrane sheet with the outer frame. The membrane sheet spans across the central opening, and is configured to transfer one or both of sensible energy or latent energy therethrough. The integrating operation may include injection-molding the outer frame to edge portions of the membrane sheet. Alternatively, the integrating operation may include laser-bonding, ultrasonically bonding, heat-sealing, or the like, the membrane sheet to the outer frame.

Abstract: A fan array fan section in an air-handling system includes a plurality of fan units arranged in a fan array and positioned within an air-handling compartment. One preferred embodiment may include an array controller programmed to operate the plurality of fan units at peak efficiency by computing the power consumed in various configurations and selecting the configuration requiring minimum power to operate.

Abstract: A wearable device for detecting a user state is disclosed. The wearable device includes an accelerometer for measuring an acceleration of a user, a magnetometer for measuring magnetic field associated with the user's change of orientation, a microphone for receiving audio, a memory for storing the audio, and at least one processor communicatively connected to the accelerometer, the magnetometer, the microphone, and the memory. The processor is identified to declare a measured acceleration as a suspected user state, and to categorize the suspected user state based on the stored audio as one of an activity of daily life (ADL), a confirmed user state, or an inconclusive event.

Abstract: An energy exchanger is provided. The exchanger includes a housing having a front and a back. A plurality of panels forming desiccant channels extend from the front to the back of the housing. Air channels are formed between adjacent panels. The air channels are configured to direct an air stream in a direction from the front of the housing to the back of the housing. A desiccant inlet is provided in flow communication with the desiccant channels. A desiccant outlet is provided in flow communication with the desiccant channels. The desiccant channels are configured to channel desiccant from the desiccant inlet to the desiccant outlet in at least one of a counter-flow or cross-flow direction with respect to the direction of the air stream.

Abstract: A camera system comprising a camera, a wireless power transmitter, a wireless power receiver, and an infrared illuminator. The camera and wireless power transmitter are powered by a power source. The wireless power transmitter wirelessly transmits power to the wireless power transmitter to power the infrared illuminator. The infrared illuminator generates infrared light.

Abstract: A heat pump system for conditioning outside air supplied to a building is provided. The system includes a pre-processing module that receives and cools air when the system is operating in a summer mode. A supply air heat exchanger is in flow communication with the pre-processing module. The supply air heat exchanger receives and cools air from the pre-processing module in the summer mode. A processing module is in flow communication with the supply air heat exchanger. The processing module receives and dehumidifies saturated air from the supply air heat exchanger in the summer mode.

Abstract: A device has a distance sensor and a transmitter. The distance sensor, attached to a barrier, measures an opening formed by the barrier. The transmitter transmits a control signal to a barrier controller. The barrier controller controls a movement of the barrier based on the control signal. The device receives a requested size of the opening. The device transmits, to the barrier controller, a first control signal that instructs the barrier controller to move the barrier and a second control signal that instructs the barrier controller to stop the movement of the barrier after an elapsed time has expired. The device measures a final size of the opening and adjusts the elapsed time based on the final size of the opening and the requested size of the opening.

Abstract: Systems and methods for controlling temperature in an enclosed space can include an air-to-air heat exchanger (AAHX) and a direct evaporative cooler (DEC). The DEC can be located in a scavenger or outdoor air stream such that the DEC cools the outdoor air, which is then used to cool or reject heat from a process air stream passing through the AAHX. In an example, the AAHX can be a sensible wheel. In another example, the AAHX can be a counter-flow flat plate. The system can operate in various modes, including an economizer mode and an evaporation mode, depending, in part, on the outdoor air conditions and a load on the system. In some examples, the system can include a DX coil to provide additional cooling to the process air in another operating mode.

Abstract: A test tool for a low voltage devices is described. The test tool comprises a voltage sensor, a current sensor, a diode sensor, a testing module, and an indicator. The voltage sensor determines a voltage between a first and second electrical wire from an alternating current (AC) transformer. The current sensor determines a current between the first and second electrical wires. The diode sensor determines a presence of a diode connected to the first and second electrical wires based on the current and the voltage. The testing module identifies one or more installation diagnostics related to a device to be coupled with the AC transformer. The indicator generates a visual or audible indicator corresponding to the one or more installation diagnostics.

Abstract: Systems and methods grant immunity from a monitoring system. For example, a monitoring system comprises a portable device configured to communicate a unique identifier with a registration signal, and a monitoring system. The monitoring system comprises a database including the unique identifier, a sensor configured to detect a condition, and a controller configured to receive a detection signal from the sensor when the condition is detected. The monitoring system grants immunity from the sensor to the portable device when the registration signal is received by the monitoring system.

Abstract: A dryer vent monitor device includes a temperature sensor coupled to a dryer exhaust pipe to measure a temperature inside the dryer exhaust pipe. A differential air pressure sensor is coupled at an input connection between a dryer and the exhaust pipe and at an output connection between the dryer exhaust pipe and an outdoor vent. The differential air pressure sensor measures a differential air pressure between the input connection and the output connection. A transceiver communicates with a monitoring system registered with the dryer vent monitoring device. The dryer vent monitoring device compares both the temperature and the differential air pressure with a preset threshold, determines that at least one of the temperature and the differential air pressure exceed the preset threshold, and generates an alert signal in response to determining that at least one of the temperature and the differential air pressure exceed the preset threshold.

Abstract: A device for measuring a position of a panel of an overhead garage door is described. The device has an accelerometer, an atmospheric pressure sensor, and a processor. The accelerometer is attached to the panel and detects a motion or vibration of the panel. The atmospheric pressure sensor triggers a measurement of an ambient atmospheric pressure in response to the detected motion of the panel. A state of the panel is determined based on a combination of the measured ambient atmospheric pressure and the detected motion of the panel.