An ultrasound circuit comprising a trans-impedance amplifier (TIA) with built-in time gain compensation functionality is described. The TIA is coupled to an ultrasonic transducer to amplify an electrical signal generated by the ultrasonic transducer in response to receiving an ultrasound signal. The TIA is, in some cases, followed by further analog and digital processing circuitry.

A method of operating a wellbore using a plurality of acoustic emission transducers. The method comprises deploying acoustic emission transducers in association with at least one of a member of a drill string, a bottomhole assembly, and a drill bit coupled to the drill string in a wellbore. The acoustic emission transducers are coupled to a controller comprising a processor and memory. The processor is programmed to determine one or more of a frequency of the acoustic emissions, an amplitude of the acoustic emissions, an energy of the acoustic emissions, a duration of the acoustic emissions, a rise time of the acoustic emissions, and a frequency centroid of the acoustic emissions. The method includes measuring acoustic emissions generated by acoustic events originating within the wellbore with the acoustic emission transducers. Downhole acoustic systems for monitoring drilling operations of a wellbore are also disclosed.

A building management system including building equipment operable to affect a variable state or condition of a building. The building management system includes a controller including a processing circuit. The processing circuit is configured to obtain a vibration data set related to vibrations of the building equipment. The processing circuit is configured to analyze the vibration data set by one or more machine learning models to generate a set of probabilities. The set of probabilities is related to a probability that the vibration data set is abnormal. The processing circuit is configured to identify the vibration data set as normal or abnormal based on the set of probabilities. The processing circuit is configured to initiate a corrective action responsive to identifying the vibration data set as abnormal.

A building management system including building equipment operable to affect a variable state or condition of a building. The building management system includes a controller including a processing circuit. The processing circuit is configured to obtain a vibration data set related to vibrations of the building equipment. The processing circuit is configured to analyze the vibration data set by one or more machine learning models to generate a set of probabilities. The set of probabilities is related to a probability that the vibration data set is abnormal. The processing circuit is configured to identify the vibration data set as normal or abnormal based on the set of probabilities. The processing circuit is configured to initiate a corrective action responsive to identifying the vibration data set as abnormal.

A vibration detection instrument assembly includes a vibration detection instrument and a deformable base part. The vibration detection instrument has a body part, including a support surface and an attachment screw extending from the support surface. The attachment screw enables the vibration detection instrument to be assemblable to a device to be monitored. The vibration detection instrument includes a vibration sensor to detect vibration at least in a direction deviating from a longitudinal axis of the attachment screw. The deformable base part is arranged at least partly against the support surface of the body part. The vibration detection instrument assembly includes a direction indicator arranged to indicate the direction of the vibration sensor.

A vibration detection instrument assembly includes a vibration detection instrument and a deformable base part. The vibration detection instrument has a body part, including a support surface and an attachment screw extending from the support surface. The attachment screw enables the vibration detection instrument to be assemblable to a device to be monitored. The vibration detection instrument includes a vibration sensor to detect vibration at least in a direction deviating from a longitudinal axis of the attachment screw. The deformable base part is arranged at least partly against the support surface of the body part. The vibration detection instrument assembly includes a direction indicator arranged to indicate the direction of the vibration sensor.

A method for evaluating a vibrating sensation similarity may generally include acquiring waveforms of two acceleration signals and waveforms of two excitation signals corresponding to the two acceleration signals, respectively; and, based on the waveforms of the two acceleration signals and the waveforms of the corresponding excitation signals, calculating a similarity between the waveforms of the two acceleration signals by a method for calculating an acceleration similarity to thereby evaluate a vibrating sensation similarity of devices corresponding to the two acceleration signals according to the similarity between the waveforms of the two acceleration signals. The method for calculating an acceleration similarity may include a method for calculating a similarity between the two acceleration signals from the perspective of numerical values and/or a method for calculating a similarity between the two acceleration signals from the perspective of user experience.

A method for evaluating a vibrating sensation similarity may generally include acquiring waveforms of two acceleration signals and waveforms of two excitation signals corresponding to the two acceleration signals, respectively; and, based on the waveforms of the two acceleration signals and the waveforms of the corresponding excitation signals, calculating a similarity between the waveforms of the two acceleration signals by a method for calculating an acceleration similarity to thereby evaluate a vibrating sensation similarity of devices corresponding to the two acceleration signals according to the similarity between the waveforms of the two acceleration signals. The method for calculating an acceleration similarity may include a method for calculating a similarity between the two acceleration signals from the perspective of numerical values and/or a method for calculating a similarity between the two acceleration signals from the perspective of user experience.

According to one embodiment, a vibration detecting device includes a housing, a vibration sensor, a circuit board, a flexible wiring member, and an elastic member. The vibration sensor is accommodated in the housing. The circuit board is accommodated in the housing, and is provided with a first electric component configured to process a detection signal of the vibration sensor. The wiring member electrically connects the vibration sensor and the circuit board to each other. The elastic member contains a polymer material, and is accommodated in the housing as being in contact with the housing and the circuit board, and being detachable from the housing. The circuit board is held by the housing through the elastic member.

An environmental condition may be measured with a sensor (10) including a wire (20) having an ultrasonic signal transmission characteristic that varies in response to the environmental condition by sensing ultrasonic energy propagated through the wire using multiple types of propagation, and separating an effect of temperature on the wire from an effect of strain on the wire using the sensed ultrasonic energy propagated through the wire using the multiple types of propagation. A positive feedback loop may be used to excite the wire such that strain in the wire is based upon a sensed resonant frequency, while a square wave with a controlled duty cycle may be used to excite the wire at multiple excitation frequencies. A phase matched cone (200, 210) may be used to couple ultrasonic energy between a waveguide wire (202, 212) and a transducer (204, 214).