Abstract: Systems, methods, and computer readable medium are provided for automatically resetting a zero-offset calibration coefficient for a pressure transducer. Ambient pressure measurements from a first pressure sensor and a second pressure sensor can be received by a computing device and compared. Based on determining a difference in the received ambient pressure measurements, an updated zero-offset calibration coefficient can be generated. The updated zero-offset calibration coefficient can be transmitted to the first pressure sensor, which once received, causes the first pressure sensor to update a previously determined zero-offset calibration coefficient with the updated zero-offset calibration coefficient.

Abstract: Systems, methods, and computer readable medium are provided for automatically resetting a zero-offset calibration coefficient for a pressure transducer. Ambient pressure measurements from a first pressure sensor and a second pressure sensor can be received by a computing device and compared. Based on determining a difference in the received ambient pressure measurements, an updated zero-offset calibration coefficient can be generated. The updated zero-offset calibration coefficient can be transmitted to the first pressure sensor, which once received, causes the first pressure sensor to update a previously determined zero-offset calibration coefficient with the updated zero-offset calibration coefficient.

Abstract: Methods and apparatus for measuring liquid fuel flows within a conduit are disclosed. An example flow sensor may include a conduit arranged to flow fuel therethrough along a flow axis, the conduit defining a flow area orthogonal to the flow axis. The flow sensor may further include a first transducer arranged to direct a first signal through the conduit proximate the flow area to a second transducer, the second transducer being arranged to direct a second signal through the conduit proximate the flow area to the first transducer, the first transducer being spaced apart from the second transducer by a signal path length, and in a direction parallel to the flow axis by an axial distance. The fuel flow measuring system may further include a processor arranged to calculate a fuel mass flow rate based on first and second signal transit times, known fuel properties and a fuel temperature.

Abstract: Methods and apparatus for measuring liquid fuel flows within a conduit are disclosed. An example flow sensor may include a conduit arranged to flow fuel therethrough along a flow axis, the conduit defining a flow area orthogonal to the flow axis. The flow sensor may further include a first transducer arranged to direct a first signal through the conduit proximate the flow area to a second transducer, the second transducer being arranged to direct a second signal through the conduit proximate the flow area to the first transducer, the first transducer being spaced apart from the second transducer by a signal path length, and in a direction parallel to the flow axis by an axial distance. The fuel flow measuring system may further include a processor arranged to calculate a fuel mass flow rate based on first and second signal transit times, known fuel properties and a fuel temperature.

Abstract: Flowmeters are disclosed herein that include one or more flow path features for improving the measurement accuracy or other aspects of the flowmeter. A flowmeter can include an elongate body having a first end and a second end and a flow path extending between the first and second ends along a longitudinal axis. An ultrasonic transducer can be disposed in a measurement section of the flow path and configured to emit ultrasonic waves into a material flowing through the flow path. First and second protrusions can be formed in a conditioning section of the flow path upstream from the measurement section, the first and second protrusions extending radially inward from a sidewall of the flow path and being configured to reduce swirling flow through the measurement section.

Abstract: Flowmeters are disclosed herein that include one or more flow path features for improving the measurement accuracy or other aspects of the flowmeter. In some embodiments, the flowmeter includes a measurement section having a non-circular transverse cross-section in which one or more sensors for measuring flow are disposed. The non-circular measurement section can reduce distortion of ultrasonic waves, facilitate chordal measurements with flush-mounted transducers, and reduce the propagation distance between paired transducers. In some embodiments, the flowmeter includes a conditioning section with diametrically opposed longitudinal rib protrusions. The protrusions can reduce swirling flow, direct liquid components of a multi-phase flow towards the sidewalls of the flow path, and guide ballistic particles through the center of the flow path away from sensitive measurement devices.

Abstract: An apparatus for mounting a pipe sensor is disclosed. The apparatus comprises a pipe and a sensor. The pipe has a pipe wall with a section removed defining a passage through the pipe wall. The sensor has a collar, is disposed in the passage, and is exposed to the interior of the pipe. In one embodiment, the sensor can be welded to the pipe wall. In another embodiment, an insert can be disposed in the passage between the sensor and the pipe wall, with a locking nut engaged with the insert and pressing upon the collar to fasten the sensor to the insert.

Abstract: An apparatus for mounting a pipe sensor is disclosed. The apparatus comprises a pipe and a sensor. The pipe has a pipe wall with a section removed defining a passage through the pipe wall. The sensor has a collar, is disposed in the passage, and is exposed to the interior of the pipe. In one embodiment, the sensor can be welded to the pipe wall. In another embodiment, an insert can be disposed in the passage between the sensor and the pipe wall, with a locking nut engaged with the insert and pressing upon the collar to fasten the sensor to the insert.