According to one embodiment, a sensor module includes a sensor and a diagnosis circuit. The sensor includes piezoelectric transducers and switches. The piezoelectric transducers have different resonance frequencies. The switches are provided to correspond to the piezoelectric transducers, respectively. Each of the switches outputs an output signal corresponding to a voltage generated by an inverse piezoelectric effect of a corresponding piezoelectric transducer of the piezoelectric transducers. The diagnosis circuit diagnoses, based on a difference in pattern of the output signal, whether vibration has newly occurred in the sensor, and switch an output destination of the output signal of the sensor according to a result of the diagnosis.

An assembly arrangement for connecting a membrane of a vibration sensor with a drive unit such that vibrations of the drive unit are transmitted to the membrane and vibrations of the membrane are transferred to the drive unit, wherein the assembly arrangement is formed as a cylindrical sleeve, having on one end a fastening section for indirectly or directly fastening to the membrane or an element connected with the membrane, and an insertion opening for the drive unit on the other end.

An assembly arrangement for connecting a membrane of a vibration sensor with a drive unit such that vibrations of the drive unit are transmitted to the membrane and vibrations of the membrane are transferred to the drive unit, wherein the assembly arrangement is formed as a cylindrical sleeve, having on one end a fastening section for indirectly or directly fastening to the membrane or an element connected with the membrane, and an insertion opening for the drive unit on the other end.

An ultrasonic dry coupled wheel probe with radial transducers emit ultrasound in substantially all radial directions relative to a longitudinal axis. The probe does not require normalization and is efficient in directing ultrasound to a surface being inspected. The probe has a wheel composed of rubber or other materials for acoustically dry coupling the transducer to the surface. A first transducer is composed of a piezoelectric material so that the transducer receives an electrical signal, vibrates, and generates and transmits sound, such as ultrasound. Similarly, a second transducer receives sound such as ultrasound, vibrates, and generates a corresponding electrical signal. The transducer arrangement both transmits ultrasound to the surface and receives the reflection of the ultrasound from the surface. An acoustic barrier separates the transmitting component from the receiving component. The transducer has annular electroplates adjacent to the piezoelectric material. The two transducers can comprise a single, integrated transducer module.

The objective of this invention is to provide an ultrasonic-wave transmitter/receiver fish-finder that stabilizes its balanced state while in water to transmit ultrasonic waves vertically downward, thus improving detection accuracy. The ultrasonic-wave transmitter/receiver 10 includes an ultrasonic transducer 21 that transmits and receives ultrasonic waves; a hanging-bell shaped case 50 that houses the ultrasonic transducer 21; and a cable 40 that suspends the case 50. A weight 81 is arranged above the ultrasonic transducer 21 provided at the bottom 54 of the case 50. In addition, the filler A1 is filled into the case 50 such that a cavity A2 is secured in the upper region of the case 50.

A sensor is provided that includes a piezoelectric body; an electric resistor disposed on a first principal surface of the piezoelectric body; a vibration detection electrode disposed on a second principal surface of the piezoelectric body; a resistance voltage dividing circuit that has a first input terminal and a voltage dividing point; and a feedback processing circuit that has a second input terminal. Moreover, the electric resistor is connected to the voltage dividing point and the first input terminal, and the vibration detection electrode is connected to the second input terminal.

A sensor is provided that includes a piezoelectric body; an electric resistor disposed on a first principal surface of the piezoelectric body; a vibration detection electrode disposed on a second principal surface of the piezoelectric body; a resistance voltage dividing circuit that has a first input terminal and a voltage dividing point; and a feedback processing circuit that has a second input terminal. Moreover, the electric resistor is connected to the voltage dividing point and the first input terminal, and the vibration detection electrode is connected to the second input terminal.

A power module for producing structure-borne sound. The power module includes: a control unit and a first substrate, the control unit being situated on the first substrate; at least one first power semiconductor and at least one second power semiconductor, the first substrate being situated on the at least one first power semiconductor and on the at least one second power semiconductor; a first metal connection, a second substrate, and a second metal connection, the first metal connection electrically connecting the first substrate and the second substrate, and the second metal connection being situated below the second substrate, wherein the second substrate has a piezoelectric material and the control unit is set up to excite the piezoelectric material of the second substrate so that a structure-borne sound signal is produced.

A power module for producing structure-borne sound. The power module includes: a control unit and a first substrate, the control unit being situated on the first substrate; at least one first power semiconductor and at least one second power semiconductor, the first substrate being situated on the at least one first power semiconductor and on the at least one second power semiconductor; a first metal connection, a second substrate, and a second metal connection, the first metal connection electrically connecting the first substrate and the second substrate, and the second metal connection being situated below the second substrate, wherein the second substrate has a piezoelectric material and the control unit is set up to excite the piezoelectric material of the second substrate so that a structure-borne sound signal is produced.

An ultrasonic transducer array including a substrate, a membrane overlying the substrate, the membrane configured to allow movement at ultrasonic frequencies, and a plurality of anchors connected to the substrate and connected to the membrane. The membrane includes a piezoelectric layer, a plurality of first electrodes, and a plurality of second electrodes, wherein each ultrasonic transducer of a plurality of ultrasonic transducers includes at least a first electrode and at least a second electrode. The plurality of anchors includes a first anchor including a first electrical connection for electrically coupling at least one first electrode to control circuitry and a second anchor including a second electrical connection for electrically coupling at least one second electrode. The ultrasonic transducer array could be either a two-dimensional array or a one-dimensional array of ultrasonic transducers.