An acoustic transducer, especially an air transducer, including a piezoceramic disk (10). The object of the invention is to provide an improved transducer of this type for more efficiently converting electromagnetic waves into mechanical waves and vice versa. To this end, a combination of a piezoceramic disk (10) and a membrane (8) is provided, the membrane being configured as a monomorphic flexural resonator and being composed of an epoxy-hollow glass sphere mixture or of a material which is si...

The invention relates to an electromechanical transducer that is easy and inexpensive to produce. The inventive transducer comprises stacked piezoelectric elements between which contact electrodes (G, S, E) are interposed via which the piezoelectric elements are electrically connected. The contact electrodes (G, S, E) are configured as planar terminal lugs that are connected to the outside from a flexible printed board.

An ultrasonic transducer is provided having a transduction element in the form of a truncated cone. The angle of the transduction element is selected so that the majority of the acoustic energy incident on the target is refracted beyond the longitudinal critical angle, which minimizes contamination of the inspection results.

A motion transducer having a user moveable plunger which compresses a spring for generating a force proportional to plunger displacement and applying the generated force to an actuator telescoped onto the plunger. The actuator has an elastomeric pad on the surface which contacts and reacts the generated force onto a force/pressure sensitive resistive strip which varies its resistance with the changing force applied by the elastomeric pad. The changes in resistance may be electrically detected to...

A capacitance transducer is provided herein for use in measuring loads. It includes a flexible first electrode, a flexible thin film solid dielectric and a fluid dielectric therebetween. A load which is applied to the transducer presses the first electrode, and the thin film dielectric against the second electrode, thereby squeezing out the fluid dielectric to increase the area of the electrodes that are in close proximity. This provides a capacitance transducer that has a significant linear res...

One aspect is a pressure transducer package comprising a housing, a diaphragm, a support disposed in the housing and a sensing element disposed in the housing between the diaphragm and the support so that the pressure from the environment acts on the diaphragm to compress the sensing element. The sensing element comprises at least one substrate having a coefficient of thermal expansion greater than 4 ppm/k. In another aspect, the sensing element comprises at least one substrate formed of a first...

An angle transducer comprising a first disk, the rotor, with circularly arranged and radially directed receiver electrodes and a second disk, the stator, equipped with circularly arranged and radially directed transmitter electrodes arranged at the same radius as the receiver electrodes and with a fixed separation between the receiver and transmitter electrodes, whereby the disks are arranged coaxially and rotatable relative to each other, and the disks are further separated by a thin air-gap. T...

A capacitive transducer, in particular a condenser microphone, with a ring-shaped member and a diaphragm secured to the ring-shaped member. A disc-shaped member is secured in the opening of the ring-shaped member and in parallel relationship to the diaphragm. The disc-shaped member has an electrically conductive portion spaced from the ring-shaped member and facing the diaphragm in a predetermined distance therefrom, whereby the diaphragm and the electrically conductive portion on the disc-shape...

The transducer has a case which is formed by a support frame for supporting a fluid-conducting flow tube and by a case cap for encasing at least one bent segment of the flow tube which vibrates during operation of the transducer. The case cap comprises a channel-shaped first cap segment with a circular-arc-shaped first segment edge of predeterminable radius R and with an essentially identically shaped second segment edge. The first cap segment has a circular-arc-shaped cross section with a radiu...

A sonar transducer mounted on a probe inserted in a vessel or container emits a sonar wave for measuring the level of fluid interfaces within the vessel or container. The sonar transducer includes a housing closed by a diaphragm at one end. A piezoelectric crystal located within the housing is biased against the diaphragm and is electrically connected to an energizing source. The travel time of the sonar wave emitted by the piezoelectric crystal and reflected by the fluid interfaces is measured....