10 results about "Ultrasonic absorption" patented technology

The utility model provides an SF6 gas sensing device based on ultrasonic wave absorption principle, it includes casing, controller, blowing mechanism, ultrasonic wave emitter and ultrasonic wave receiver, the inside of casing defines gas detection chamber and blowing channel, blowing mechanism is installed in blowing channel, the air outlet end of blowing channel is communicated with gas detection chamber, the ultrasonic wave emitter is connected with ultrasonic wave receiver, the ultrasonic wave emitter is connected with ultrasonic wave receiver. The air detection chamber is provided with an air outlet, the ultrasonic transmitter is arranged at the right side end of the air detection chamber, the ultrasonic receiver is arranged at the left side end of the air detection chamber, the air outlet end of the air supply channel is connected to the position close to the right side end of the air detection chamber, and the air outlet of the air detection chamber is formed in the position close to the left side end of the air detection chamber. And the controller is electrically connected with the ultrasonic transmitter, the ultrasonic receiver and the air supply mechanism. The gas sensing device can actively send ambient air into the gas detection chamber for sulfur hexafluoride gas concentration detection, adopts ultrasonic waves to detect the concentration of sulfur hexafluoride, and has the advantages of high reaction speed, high sensitivity, stable work and low cost.

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.

A display device is provided. The display device includes: a display panel including a first substrate and a pixel array layer disposed on a first surface of the first substrate; a vibration generator including a sound output unit and a first ultrasonic wave output unit, the sound output unit vibrates the display panel to output sound, and the first ultrasonic wave output unit vibrates the display panel to output ultrasonic waves; and a first ultrasonic wave absorbing film overlapped with the first ultrasonic wave output unit in a thickness direction of the display panel, wherein the first ultrasonic wave absorbing film absorbs ultrasonic waves.

An ultrasonic object detection device includes a vibrating plate made of resin, an ultrasonic sensor, and an ultrasonic absorber. The vibrating plate made of resin is disposed outside a door that opens and closes an opening part of a vehicle body so as to extend in the vehicle length direction. The ultrasonic sensor is disposed on an inner surface of the vibrating plate, and can transmit and receive an ultrasonic wave. The ultrasonic absorber is disposed so as to cover the inner surface of the vibrating plate including the ultrasonic sensor.

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 invention relates to the technical field of gas flow meters, in particular to an external clamping type ultrasonic gas flow meter which comprises an ultrasonic absorber and a pair of ultrasonic generators which are arranged on a gas conveying pipeline in a sleeving mode, a supporting frame is installed on the ultrasonic absorber, a limiting piece is installed on the supporting frame, and the ultrasonic generators are installed in the limiting piece. A data processor is mounted on the support frame and is electrically connected with the ultrasonic generator; the ultrasonic generator is used for transmitting and receiving ultrasonic waves; the ultrasonic generator comprises a sound wedge, an ultrasonic transducer is clamped on the sound wedge, a pressing plate is mounted on the sound wedge, the pressing plate is used for locking the ultrasonic transducer on the sound wedge, and an isolating layer is arranged between the pressing plate and the ultrasonic transducer; the outer side of the pressing plate is sleeved with a shell, and silica gel is filled between the shell and the pressing plate and between the shell and the ultrasonic transducer. The sound wedge abuts against the gas conveying pipeline. The ultrasonic gas flowmeter 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.

Aspects disclosed herein include a composite material comprising: one or more shape memory polymers; and a first additive provided in the shape memory polymer(s); wherein: the first additive increases one or more ultrasound-absorption characteristics of the composite material compared to that of the same shape memory polymer(s) free of said first additive; the composite material is characterized by a composite transition temperature (Tcm,trans); and the composite material or one or more portions thereof undergo a shape change from a temporary shape to a permanent shape when the composite material or said one or more portions thereof are heated to within 35° C. of Tcm,trans or a temperature approximately equal to or greater than Tcm,trans.