阅读说明：本技术 超声波换能器、超声波探头以及超声波检测装置 (Ultrasonic transducer, ultrasonic probe, and ultrasonic detection device ) 是由 周丹 陈露露 罗华 刘建华 欧阳波 莫建华 于 2018-06-12 设计创作，主要内容包括：一种超声波换能器(200)包括：压电振子组(10)、声学匹配层(20)、散热体(30)以及吸声层(40)。压电振子组(10)具有第一侧(12)和第二侧(13),压电振子组(10)包括至少一个压电振子(11),声学匹配层(20设在压电振子组(10)的第一侧(12)。散热体(30)设在压电振子组(10)的第二侧(13),散热体(30)包括本体(31)、分别位于本体(31)的两端的头部(32)和尾部(33),本体(31)大体形成为柱体状且具有在从头部(32)到尾部(33)的方向上延伸的中心轴线,散热体(30)的头部(32)与压电振子组(10)相对且尾部(33)与压电振子组(10)相背离,散热体(30)的尾部(33)的相背于头部(32)设置的表面为第一表面(331),第一表面(331)为斜面或锥面,且第一表面(331)与中心轴线的夹角为锐角,吸声层(40)至少覆盖第一表面(331)。(An ultrasonic transducer (200) comprising: the acoustic transducer comprises a piezoelectric vibrator group (10), an acoustic matching layer (20), a heat radiating body (30) and a sound absorbing layer (40). The piezoelectric vibrator group (10) is provided with a first side (12) and a second side (13), the piezoelectric vibrator group (10) comprises at least one piezoelectric vibrator (11), the acoustic matching layer (20) is arranged on the first side (12) of the piezoelectric vibrator group (10), the heat dissipation body (30) is arranged on the second side (13) of the piezoelectric vibrator group (10), the heat dissipation body (30) comprises a body (31), a head portion (32) and a tail portion (33) which are respectively arranged at two ends of the body (31), the body (31) is generally formed into a cylindrical shape and is provided with a central axis extending in the direction from the head portion (32) to the tail portion (33), the head portion (32) of the heat dissipation body (30) is opposite to the piezoelectric vibrator group (10), the tail portion (33) is deviated from the piezoelectric vibrator group (10), the surface, opposite to the head portion (32), of the tail portion (33) of the heat dissipation body (30) is provided with a first surface (331), the first surface (, and the included angle between the first surface (331) and the central axis is an acute angle, and the sound absorption layer (40) at least covers the first surface (331).)

An ultrasonic transducer, comprising:

a piezoelectric vibrator group having a first side and a second side, the piezoelectric vibrator group including at least one piezoelectric vibrator;

an acoustic matching layer disposed on a first side of the set of piezoelectric vibrators;

the radiating body is arranged on the second side of the piezoelectric vibrator group and comprises a body, a head part and a tail part, wherein the head part and the tail part are respectively positioned at two ends of the body, the body is generally formed into a cylindrical body and is provided with a central axis extending in the direction from the head part to the tail part, the head part of the radiating body is opposite to the piezoelectric vibrator group, the tail part of the radiating body deviates from the piezoelectric vibrator group, the surface of the tail part of the radiating body, which is back to the head part, is a first surface, the first surface is an inclined surface or a conical surface, and the included angle between the first surface and the central axis is an acute angle; and

an acoustic absorption layer covering at least the first surface.

The ultrasonic transducer of claim 1, wherein the first surface comprises at least one inclined surface that forms an acute angle with a central axis of the body.

The ultrasonic transducer of claim 1, wherein the first surface comprises: two intersect in a straight line and follow the afterbody to the inclined plane that the direction of head was kept away from each other gradually, two the contained angle of inclined plane is the acute angle and every inclined plane with the contained angle of the central axis of body is the acute angle.

The ultrasonic transducer of claim 1, wherein the first surface is a pyramid, and each surface of the pyramid forms an acute angle with the central axis.

The ultrasonic transducer of claim 1, wherein the first surface is a conical surface, and wherein an apex angle passing through an apex of the conical surface and on any cross section coincident with the central axis is less than 90 degrees.

The ultrasonic transducer of claim 1, wherein the acoustic absorption layer covers at least an outer surface of the tail.

The ultrasonic transducer of claim 1, wherein the acoustic absorption layer covers an outer surface of the tail, an outer surface of the body, and a sidewall of the head.

The ultrasonic transducer according to claim 7, wherein the heat sink is any one of single crystal alumina, single crystal silicon, and single crystal silicon carbide.

The ultrasonic transducer of claim 7, wherein a distance between the heat sink and the second side of the piezoelectric vibrator group is δ, and δ is greater than or equal to 0 mm and less than or equal to 3 mm.

The ultrasonic transducer of claim 1, wherein the end surface of the head of the heat sink is a second surface, the sound absorbing layer further covers the second surface, and the second surface of the heat sink is spaced apart from the second side of the group of piezoelectric vibrators by the sound absorbing layer.

The ultrasonic transducer according to claim 10, wherein the head of the heat radiator has a plurality of heat radiating portions that protrude toward the piezoelectric vibrator group, the plurality of heat radiating portions are spaced apart from each other, and the sound absorbing layer has sound absorbing protrusions that fill gaps between adjacent ones of the heat radiating portions.

The ultrasonic transducer of claim 11, wherein the heat spreader is a polycrystalline material.

The ultrasonic transducer of claim 1, wherein the sound absorbing layer completely covers an outer surface of the heat sink.

The ultrasonic transducer of claim 1, wherein a distance between the heat sink and the second side of the piezoelectric vibrator group is δ, and δ is greater than or equal to 0 mm and less than or equal to 3 mm.

The ultrasonic transducer of claim 1, wherein the first side wall of the sound absorption layer covers the first surface of the heat dissipation body, the end surface of the head of the heat dissipation body is a second surface, and the outer surface of the first side wall and the second surface are parallel to each other.

The ultrasonic transducer of claim 1, wherein at least the first surface of the outer surface of the tail is a polished surface.

The ultrasonic transducer of claim 1, wherein the sound absorption layer comprises a flexible matrix and particle bodies filled in the flexible matrix; the flexible substrate is any one of epoxy, polyurethane and silica gel, and the particle body is any one of tungsten powder and lead powder.

An ultrasonic probe comprising the ultrasonic transducer according to claim 1.

The ultrasonic probe of claim 18, comprising a housing, an acoustic window connected to the housing at one end of the housing, the acoustic window and the housing together defining a containment chamber, the ultrasonic transducer being located within the containment chamber.

An ultrasonic testing apparatus comprising the ultrasonic probe of claim 18.