Data retrieval, event recording and transmission module connectable to safety and relief valves. The module (10) coupled to safety or relief valves for the measurement, transmission and recording of events and includes a rigid and inextensible at room temperature longitudinal element defining an acoustic emission waveguide (12) that transmits vibrations. The end (12a) of (12) is in intimate contact with a portion (2) or (1) of the valve, and its other end (12b) penetrates inside a closed resistant box (10), wherein it sits in contact against at least one acoustic emission sensor (13) receiving a signal proportional to the vibrations transmitted by the waveguide (12).

Data retrieval, event recording and transmission module connectable to safety and relief valves. The module (10) coupled to safety or relief valves for the measurement, transmission and recording of events and includes a rigid and inextensible at room temperature longitudinal element defining an acoustic emission waveguide (12) that transmits vibrations. The end (12a) of (12) is in intimate contact with a portion (2) or (1) of the valve, and its other end (12b) penetrates inside a closed resistant box (10), wherein it sits in contact against at least one acoustic emission sensor (13) receiving a signal proportional to the vibrations transmitted by the waveguide (12).

An ultrasonic sensor includes a vibration plate that includes a vibration portion and is formed of a resin; a wall portion that is provided on the vibration plate, surrounds the vibration portion and is formed of a resin; and a piezoelectric element that is provided in the vibration portion of the vibration plate. Accordingly, the wall portion surrounding the vibration portion can suppress a frequency variation of an ultrasonic wave output from the ultrasonic sensor and can deform the ultrasonic sensor into a shape corresponding to a surface of an object having various shapes.

Systems and methods for determining sound-producing characteristics of electroacoustic transducers are disclosed. According to an aspect, a system includes electroacoustic transducers configured to generate sound. The system also includes an acoustoelectric transducer configured to convert sound produced by the electroacoustic transducers into one or more electrical signals. Further, the system includes a computing device configured to apply one or more patterns of electrical signals to the electroacoustic transducers to test for one or more sound-producing characteristics. The computing device is also configured to receive, from the acoustoelectric transducer, electrical signals that resulted from application of the patterns of electrical signals to the electroacoustic transducers. Further, the computing device is configured to determine, based on the received electrical signals, the sound-producing characteristics of the electroacoustic transducers for use in controlling the electroacoustic transducers to generate one or more predetermined sounds.

Systems and methods for determining sound-producing characteristics of electroacoustic transducers are disclosed. According to an aspect, a system includes electroacoustic transducers configured to generate sound. The system also includes an acoustoelectric transducer configured to convert sound produced by the electroacoustic transducers into one or more electrical signals. Further, the system includes a computing device configured to apply one or more patterns of electrical signals to the electroacoustic transducers to test for one or more sound-producing characteristics. The computing device is also configured to receive, from the acoustoelectric transducer, electrical signals that resulted from application of the patterns of electrical signals to the electroacoustic transducers. Further, the computing device is configured to determine, based on the received electrical signals, the sound-producing characteristics of the electroacoustic transducers for use in controlling the electroacoustic transducers to generate one or more predetermined sounds.

A transparent ultrasound transducer device for multi-mode optical imaging on a target is provided. The device includes a transparent piezoelectric transducer, one or more wires, and an optical lens. The transparent piezoelectric transducer of a first acoustic impedance is configured to receive acoustic waves from the target. The transparent piezoelectric transducer has a first surface and a second surface. The first surface and the second surface are coated with transparent electrically conductive coatings. The optical lens is contacted with and optically coupled to the first surface of the transparent piezoelectric transducer. The optical lens is made of a material with a second acoustic impedance, and the first and second acoustic impedances are substantially similar to minimize an acoustic impedance mismatch such that sensitivity of the device is improved.

Example ultrasonic transducers for measuring formation velocities are disclosed herein. An example apparatus includes a housing and an acoustic transducer having a first surface and a second surface opposite the first surface. The acoustic transducer is at least partially disposed in the housing. The example apparatus includes a window supported by the housing. At least a portion of the first surface of the acoustic transducer is in contact with the window. The housing and the window are to form a fluid seal for the acoustic transducer.

Example ultrasonic transducers for measuring formation velocities are disclosed herein. An example apparatus includes a housing and an acoustic transducer having a first surface and a second surface opposite the first surface. The acoustic transducer is at least partially disposed in the housing. The example apparatus includes a window supported by the housing. At least a portion of the first surface of the acoustic transducer is in contact with the window. The housing and the window are to form a fluid seal for the acoustic transducer.

A sensor element comprises: a first substrate; a detector disposed on the first substrate; and a second substrate surrounding the first substrate and supporting the first substrate. The second substrate is thicker than the first substrate. The second substrate has a connection part which is connected to the first substrate and a non-connection part which is not connected to the first substrate. The detector is located in the vicinity of the connection part.

A sensor element comprises: a first substrate; a detector disposed on the first substrate; and a second substrate surrounding the first substrate and supporting the first substrate. The second substrate is thicker than the first substrate. The second substrate has a connection part which is connected to the first substrate and a non-connection part which is not connected to the first substrate. The detector is located in the vicinity of the connection part.