Abstract: A location-based, multiuser, collaborative augmented reality (AR) system employs individual AR devices for viewing real-world anchors, that is, physical models that are recognizable to the camera and image processing module of the AR device. To mitigate ambiguous configurations when used in the collaborative mode, each anchor is registered with a server to ensure that only uniquely recognizable anchors are simultaneously active at a particular location. The system permits collaborative AR to span multiple sites, by associating a portal with an anchor at each site. Using the location of their corresponding AR device as a proxy for their position, AR renditions of the other participating users are provided. This AR system is particularly well suited for games.

Abstract: A method of pumping an oilfield fluid from a well surface to a wellbore is provided that includes providing a clean stream; operating one or more clean pumps to pump the clean stream from the well surface to the wellbore; providing a dirty stream including a solid material disposed in a fluid carrier; and operating one or more dirty pumps to pump the dirty stream from the well surface to the wellbore, wherein the clean stream and the dirty stream together form said oilfield fluid.

Abstract: A method for identifying a cause of a machine operating anomaly including creating a reduced order model (ROMs) for a digital twin model of a selected machine type and feeding current data from a deployed machine into the ROM. The method can include comparing a current output from the selected ROM with a measured output from the current data and determining that an operating anomaly exists when the difference between the current output and the measured output exceeds a selected anomaly threshold.

Abstract: A method for identifying a cause of a machine operating anomaly including creating a reduced order model (ROMs) for a digital twin model of a selected machine type and feeding current data from a deployed machine into the ROM. The method can include comparing a current output from the selected ROM with a measured output from the current data and determining that an operating anomaly exists when the difference between the current output and the measured output exceeds a selected anomaly threshold.

Abstract: A data link (101) for a MIMO communication system (100) comprises a first transceiver device (106A) comprising a body (109A) having a transducer mounting surface near or at which is mounted a plurality of first transducers (107A-107D) configured to, in use, receive and convert a plurality of electrical waveforms to a respective plurality of acoustic signals. A first bonding layer (120A) bonds a barrier mounting surface of the body of the first transceiver device to a barrier (103). The data link further comprises a second transceiver device (106B) comprising a body (109B) and a plurality of second transducers (107?A-107?D) configured to receive and convert the plurality of acoustic signals transmitted through the barrier to a respective plurality of electrical waveforms. A second bonding layer (120B) bonds a barrier mounting surface of the body of the second transceiver to the barrier.

Abstract: A flange for use on a reel, a flange adapter, and a flange stand are provided. The flange may include an outer circumference, a hub assembly, and an arbor hole adapter that is adapted to engage an arbor hole to secure the flange to the reel. The arbor hole adapter may include an expandable portion that is movable between an extended position and a retracted position. First and second expansion plates may be coupled to the arbor hole adapter and connected by shoulder bolts that guide movement of the plates between an abutting configuration and a spaced-apart configuration, allowing movement of the expandable portion relative to the reel for modified engagement. The flange stand may include a base, a support portion, and a coupler for engaging a central extension of the flange to allow the flange to be supported in an upright position.

Abstract: A salt water chlorinator assembly along a closed loop water circuit incorporates a chlorinator cell subassembly and a flow switch subassembly into respective fluidly connected chlorinator assembly housing interior portions. The chlorinator cell subassembly includes an electrolysis cell controlled by a chlorinator printed circuit board. The flow switch subassembly includes a flow sensor mounted upon a printed circuit board assembly (PCBA). A flow switch cable selectively attaches to a PCBA connector. Water flow rate data generated by the flow switch sensor, communicated via an external controller to a smart circulation pump, is used to enable automatic adjustment of the pump speed based upon the flow rate data. The external controller may further alert an end user of undesirable flow rate deviations due to a condition (e.g. a clogged pump/skimmer basket and/or dirty filter) along the closed loop circuit requiring attention.

Abstract: A pair of flanges attachable to the arbor hole of a reel is disclosed. The flanges provide a mechanism to allow the reel to be easily loaded, and lifted into place. Once loaded into place, the flanges may include a locking mechanism that locks the reel in place, centered on the flanges. Additionally, the flanges are attachable using a hub that allows them to rotate independently from one another, and from the reel to which they are attached.

Abstract: An electroacoustic transducer, comprising a piezoelectric part comprising a piezoelectric material having a first acoustical impedance and an acoustical thickness, a substrate part comprising a material having a second acoustical impedance, and an intermediate part comprising a material having a third acoustical impedance and at least partially sandwiched between the piezoelectric part and the substrate part for acoustical communication therewith. The first acoustical impedance and the second acoustical impedance each has a respective value within a range of values for which the value of third acoustical impedance: is an upper limit if said acoustical thickness is less than 0.4?, or is a lower limit if said acoustical thickness is greater than 0.4? where ? is an acoustical wavelength in the material of the piezoelectric part.

Abstract: A flange for use on a reel, a flange adapter, and a flange stand are provided. The flange may include an outer circumference, a hub assembly, and an arbor hole adapter that is adapted to engage an arbor hole to secure the flange to the reel. The arbor hole adapter may include an expandable portion that is movable between an extended position and a retracted position. First and second expansion plates may be coupled to the arbor hole adapter and connected by shoulder bolts that guide movement of the plates between an abutting configuration and a spaced-apart configuration, allowing movement of the expandable portion relative to the reel for modified engagement. The flange stand may include a base, a support portion, and a coupler for engaging a central extension of the flange to allow the flange to be supported in an upright position.

Abstract: A pool maintenance system for maintaining desired characteristics of a body of water in fluid communication therewith, includes a chlorine generator having an integral power supply input, a water circulation pump in fluid communication with the body of water and with the chlorine generator via a series of water conduits, and a heat pump in fluid communication the water circulation pump. The water circulation pump and/or the heat pump incorporate an integral power supply/transformer functioning as a single shared power source communicatively integrating the chlorine generator with the respective water circulation pump and/or heat pump. A wired and/or wireless interface is provided electrically connected to the power supply and transformer integrated with the respective water circulation pump and or heat pump.

Abstract: A flange for use on a reel, a flange adapter, and a flange stand are provided. The flange may include an outer circumference, a hub assembly, and an arbor hole adapter that is adapted to engage an arbor hole to secure the flange to the reel. The arbor hole adapter may include an expandable portion that is movable between an extended position and a retracted position. First and second expansion plates may be coupled to the arbor hole adapter and connected by shoulder bolts that guide movement of the plates between an abutting configuration and a spaced-apart configuration, allowing movement of the expandable portion relative to the reel for modified engagement. The flange stand may include a base, a support portion, and a coupler for engaging a central extension of the flange to allow the flange to be supported in an upright position.

Abstract: An electroacoustic transducer, comprising a piezoelectric part comprising a piezoelectric material having a first acoustical impedance and an acoustical thickness, a substrate part comprising a material having a second acoustical impedance, and an intermediate part comprising a material having a third acoustical impedance and at least partially sandwiched between the piezoelectric part and the substrate part for acoustical communication therewith. The first acoustical impedance and the second acoustical impedance each has a respective value within a range of values for which the value of third acoustical impedance: is an upper limit if said acoustical thickness is less than 0.4?, or is a lower limit if said acoustical thickness is greater than 0.4? where ? is an acoustical wavelength in the material of the piezoelectric part.

Abstract: A data link (101) for a MIMO communication system (100) comprises a first transceiver device (106A) comprising a body (109A) having a transducer mounting surface near or at which is mounted a plurality of first transducers (107A-107D) configured to, in use, receive and convert a plurality of electrical waveforms to a respective plurality of acoustic signals. A first bonding layer (120A) bonds a barrier mounting surface of the body of the first transceiver device to a barrier (103). The data link further comprises a second transceiver device (106B) comprising a body (109B) and a plurality of second transducers (107?A-107?D) configured to receive and convert the plurality of acoustic signals transmitted through the barrier to a respective plurality of electrical waveforms. A second bonding layer (120B) bonds a barrier mounting surface of the body of the second transceiver to the barrier.

Abstract: A drone receives an initiation signal which indicates that flight and/or navigation components of the drone are to be activated. Once activated, the drone then determines its initial position using a position-identifying radio signal. The drone then retrieves, from storage, dimensions of a drone-relative geofence. The drone can then calculate, using a processor, the drone-relative geofence having the dimensions with at least a specified floor and a specified radius. The drone adjusts the motor controller inputs to prevent the drone from exiting the calculated drone-relative geofence.

Abstract: Methods, devices, and systems for wire loom assembly are disclosed. A cable assembly device includes an inner core and an outer housing. The inner core includes a receiving member comprising a first end and a second end. The inner core further includes a splitter member attached to the first end of the receiving member. The outer housing encloses at least a portion of the inner core.

Abstract: A pair of flanges attachable to the arbor hole of a reel is disclosed. The flanges provide a mechanism to allow the reel to be easily loaded, and lifted into place. Once loaded into place, the flanges may include a locking mechanism that locks the reel in place, centered on the flanges. Additionally, the flanges are attachable using a hub that allows them to rotate independently from one another, and from the reel to which they are attached.

Abstract: An improved controller used in connection with pool area and surrounding landscaping low voltage lighting and related low voltage subcomponents, such as lighting, fountains, waterfalls, deck jets, and music or related entertainment devices, incorporates an independently-addressable light control relay, or analogous electronic component, and is implementable as a retrofit replacement for existing controller systems or, alternatively, as a complete new unit for controlling low voltage subcomponents.