5 results about "Ultrasonic absorption" patented technology

The invention provides an ultrasonic transducer and a manufacturing method thereof. The ultrasonic transducer comprises a shell internally provided with a mounting cavity; an acoustic structure is arranged in the mounting cavity, the acoustic structure comprises at least one acoustic matching layer and at least one piezoelectric array element, the acoustic matching layer is arranged on one side of the piezoelectric array element in the first direction, the other side of the piezoelectric array element is connected with a connecting piece, and the other end of the connecting piece penetrates through the shell to be connected with an ultrasonic diagnostic instrument; the mounting cavity is filled with a sound absorption backing, and the sound absorption backing is arranged around the connecting piece; a transverse absorption layer is arranged around the acoustic structure and is used for absorbing transverse ultrasonic waves emitted by the piezoelectric array elements; the transverse absorption layer absorbs most of transverse ultrasonic waves, so that transverse reflection waves are greatly attenuated, interference of the transverse reflection waves on object reflection waves is greatly reduced, the object reflection waves are converted into electric signals, the electric signals are transmitted to an ultrasonic detector through the connecting piece for signal analysis and processing, and the internal conditions of detected objects are presented more accurately. The detection effect is improved.

The present application relates to a clamp-on ultrasonic gas flowmeter, which belongs to the technical field of gas flowmeters. The ultrasonic flowmeter comprises an ultrasonic absorber and a pair of ultrasonic generators, each mounted on a gas delivery pipeline. A support frame is mounted on the ultrasonic absorber, a limiter is mounted on the support frame, the ultrasonic generator is mounted within the limiter, and a data processor is mounted on the support frame, with the data processor and the ultrasonic generator being electrically connected. The ultrasonic generator is used to transmit and receive ultrasonic waves. The ultrasonic generator comprises a sonic wedge, an ultrasonic transducer is clamped onto the sonic wedge, a pressure plate is mounted on the sonic wedge, the pressure plate is used to lock the ultrasonic transducer to the sonic wedge, and an isolation layer is provided between the pressure plate and the ultrasonic transducer. A housing is mounted on the outer side of the pressure plate, and the space between the housing, the pressure plate, and the ultrasonic transducer is filled with silicone. The sonic wedge abuts the gas delivery pipeline. The present application has the effect of improving the sensitivity of the ultrasonic gas flowmeter.

The utility model provides an ultrasonic liquid level measuring mechanism for a sewage pool and sewage treatment equipment. The ultrasonic liquid level measuring mechanism for the sewage pool comprises an overhanging bracket, an ultrasonic liquid level meter and an ultrasonic absorption sheet, the overhanging bracket is transversely mounted on a sewage pool; the second end of the overhanging bracket is positioned above the liquid level in the sewage pool; the ultrasonic liquid level meter is mounted at the second end of the cantilever bracket; the ultrasonic absorption sheet is used for being mounted on the inner side wall of the sewage pool and is positioned between the overhanging bracket and the liquid level in the sewage pool; the horizontal distance between the ultrasonic liquid level meter and the ultrasonic absorption sheet is less than 20cm, the part of the ultrasonic wave, which is transmitted to the inner side wall of the sewage pool, is absorbed by the ultrasonic absorption sheet, and the part of the ultrasonic wave, which is transmitted to the liquid level in the sewage pool, can be applied to accurately measuring the height of the liquid level in the sewage pool. Meanwhile, the ultrasonic liquid level meter is closer to the first end of the overhanging support, so that compression on the overhanging support is reduced, and pressure damage to the overhanging support is reduced.

The application provides a HIFU phantom gel material and a preparation method and application thereof, relates to the technical field of medical functional materials, and the raw material of the HIFU phantom gel material comprises butadiene rubber and dicumyl peroxide (DCP); the amount of dicumyl peroxide is 1%-3% of the mass of butadiene rubber. The HIFU phantom gel material is prepared by using butadiene rubber and a specific amount of dicumyl peroxide crosslinking agent, does not need additional additives, is non-toxic and harmless, has good biocompatibility, and is precisely matched with human soft tissue in mechanical properties and ultrasonic characteristics (sound velocity, acoustic impedance and ultrasonic absorption coefficient), so that the HIFU ablation process and effect can be precisely simulated, and there is no dehydration, shrinkage or mildew phenomenon in long-term use, and the technical problems of the existing HIFU phantom gel material, such as complex components, many additives, complicated process, mismatched ultrasonic characteristics and mechanical properties and poor ablation simulation effect, are solved.

A vitreous humor filling agent for the posterior space in the eye comprises at least one structurally asymmetric fluoroether which is in a liquid state at room temperature or under surgical conditions and which can be converted to a gaseous state after injection into the eye as a result of its own intrinsic vapour pressure or by means of an external non-invasive method. In addition to the above requirements, such compounds also have a specific gravity of between 1.1 and 1.6 (the latter being an upper limit to prevent retinal toxicity), are immiscible with water, are non-flammable, have high ultrasound absorption, and are in a clear colourless form.