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序号 专利名 申请号 申请日 公开(公告)号 公开(公告)日 发明人
81 VERTICAL FIELD TYPE MRI APPARATUS WITH A CONICAL CAVITY SITUATED IN THE MAIN MAGNET EP01967351.6 2001-09-17 EP1230560A1 2002-08-14 OVERWEG, Johannes, A.
The invention relates to a vertical field type MRI apparatus provided with a superconducting coil system 20a, 20b for generating a substantially homogeneous magnetic field in an imaging volume 18 of the apparatus. The coil system includes a circular outer coil 28 and a supplementary coil 30 which is positioned in the same plane 32 as and within the outer coil, which coils conduct opposite currents. The ratio Da/Do of the diameter Da of the supplementary coil to the diameter Do of the outer coil lies between 0,7 and 0,9. Further coils 34 to 38, 40 to 46 for making the field even more homogeneous are preferably located on a conical surface 48, 50 within the first mentioned coils 28, 30 in such a manner that a recess is formed in which a conically shaped gradient coil system 52 can be accommodated, with the result that the expensive outer coil 28 and the supplementary coil 30 can be arranged at an as short as possible distance from the space for receiving the patient to be examined.
82 Sonde de magnétomètre à RMN à cavité accordable en son centre et à galette centrale dédoublée. EP86401323 1986-06-17 EP0206931A1 1986-12-30 GLENAT HENRI; KERNEVEZ NELLY; SONREL CLAUDE
Sonde de magnétomètre à RMN à cavité accordable en son centre et à galette centrale dédoublée. L'élément d'accord de la cavité est un condensateur (50) disposé au centre de la cavité résonnante, entre deux demi-tronçons (33a, 33b) du conducteur central. Ce condensateur est réglable et amagnétique. Il est accessible par une ouverture - (52). Application à la mesure des champs magnétiques, notamment du champ magnétique ter- restre.
83 Ferromagnetic resonance measuring cavity resonator and electron spin resonance measuring apparatus having same EP96110526.9 1996-06-28 EP0751399A1 1997-01-02 Kumatoriya, Makoto, c/o Murata Manufact. Co., Ltd.; Fujii, Takashi, c/o Murata Manufact. Co., Ltd.

A ferromagnetic resonance measuring cavity resonator (10) comprises a cavity resonator (12) having a cavity (16) formed by a side wall (14). The side wall (14) is provided with an input/output hole (18) and a through-hole (20). A ferromagnetic plate (22) provided with a through-hole (24) is mounted on the outside surface of the side wall (14) such that the two through-holes (20,24) are aligned. A wafer specimen is pressed against the ferromagnetic plate (22) to face the through-hole (24). When microwaves are introduced into the cavity resonator (12), ferromagnetic resonance takes place based on the static magnetic field applied to the wafer specimen (26) and the microwaves. As a result, a ferromagnetic resonance signal is detected via the input/output hole (18).

84 Organic Light Emitting Diode Having a Resonant Optical Cavity and an Extractor Serving as a Spatial Light Filter US12084496 2006-10-31 US20090302741A1 2009-12-10 Christophe Fery
According to the invention, the extractor is a reflection concentrator. The entry section of the extractor has a larger area than its exit section. The reflecting side walls of the extractor have a suitable shape so that it makes an angle called the cut-off angle θlim, which corresponds to a limiting wavelength λC-lim for transmission from this extractor for a given optical cavity. Applied to diode-based image displays, the invention broadens the viewing angles and improves the colour purity of the images displayed.
85 COMPRESSOR RECIRCULATION SYSTEM HAVING COMPRESSOR INLET RECIRCULATION DUCT CONFIGURED TO REDUCE NOISE FROM ROSSITER EXCITATION AND CAVITY ACOUSTIC RESONANCE EP17151052.2 2017-01-11 EP3196474A1 2017-07-26 MARQUES, Manuel; GAUDE, Gladys; BATISTA, Bruno; RIGAULT, Alexandre

A compressor includes a compressor housing defining a cavity, and a compressor wheel disposed in the cavity, the compressor housing defining an inlet for leading air into the compressor wheel, a discharge volute for receiving air compressed by the compressor wheel, and a recirculation duct connected to the inlet at a location upstream of the compressor wheel. A recirculation valve is disposed between the discharge volute and the recirculation duct for regulating air flow through the recirculation duct into the inlet. The recirculation duct defines multiple parallel channels, the multiple parallel channels respectively conducting multiple parallel streams of air from the recirculation valve into the inlet.

86 Apparatus and methods for magnetic resonance (MR) imaging of cavities using fluids polarized at low temperatures US537574 1995-10-02 US5617859A 1997-04-08 Steven P. Souza; Charles L. Dumoulin; Robert D. Darrow; Harvey E. Cline
A magnetic resonance (MR) active invasive device system employs a small, high-field polarizing magnet, and a large magnetic resonance (MR) imaging magnet for the purpose of generating MR images of selected body cavities. A subject is positioned in a large low-field MR imaging magnet. A substance, intended to be used as a contrast agent is first cooled, and then passed through the small high-field polarizing magnet where it becomes highly polarized. The substance is then heated to physiologic temperatures, vaporized, and introduced into the subject through a transfer conduit as a vapor. Radiofrequency (RF) pulses and magnetic field gradients are then applied to the patient as in conventional MR imaging. Since the vapor is highly polarized, it can be imaged even though it has a much lower density than the surrounding tissue.
87 Spatially coherent surface-emitting, grating coupled quantum cascade laser with unstable resonance cavity US09854800 2001-05-14 US06560259B1 2003-05-06 Wen-Yen Hwang
A surface emitting, unipolar, quantum cascade semiconductor laser is constructed of a multilayer semiconductor structure on a substrate. The laser has doped semiconductor material only of one conductivity type. The laser includes a core region having a larger effective refractive index than cladding regions. The core region includes a plurality of repeat units, each repeat unit having a nominally identical active region and a carrier injection and relaxation region. The repeat units are for quantum cascade generation of a lasing resonance mode within a lasing resonance cavity of the multilayer semiconductor structure. A diffraction grating is fabricated within the multilayer semiconductor structure. The grating resonantly couples diverging counter-propagating traveling wave beams of the laser resonance mode while also diffracting light into an upward direction perpendicular to a grating plane and toward the substrate surface, and also into a downward direction. A mirror reflects the downwardly coupled light toward the upward direction again. The optical distance between reflecting mirror and the grating is selected to combine the reflected light with the upwardly coupled light in-phase as the output beam. A lens-like media structure having an effective refractive index profile that varies quadratically in a direction transverse to the laser resonance cavity is included in the multilayer semiconductor structure. The lowest value of the profile is located at a central portion of the laser. The profile monotonically increases moving away from the central portion. The lens-like media structure interacts with the counter-propagating traveling wave beams to provide single mode output.
88 一种吸声结构 CN93104885.0 1993-05-11 CN1053982C 2000-06-28 王法源
发明涉及一种吸声结构,尤其是空腔共振吸声结构。它包括共振腔,其要点是:整体呈便于弯曲、编强或绑扎的条状,并具有两个共振腔,各共振腔分别通过小孔与大气相通,两个共振腔按上下布置,上共振腔与下共振腔之间设有使二共振腔相连通的小孔,上共振腔的外轮廓呈吸声尖劈状。本发明在125~400Hz频率范围内,吸声系数可达0.34~0.81。
89 内燃机多向共振式消声器 CN201110303121.X 2011-10-10 CN102359408A 2012-02-22 闫兵; 董大伟; 黄冠鑫; 杨开华; 华春蓉; 窦国旺; 涂启养; 桑帅军; 辛阳
一种内燃机多向共振式消声器,包括壳体和安装于内燃机排气口的进气管,其特征在于:壳体的内腔被通气空腔的后板、前板依次分隔为同轴共振腔、通气空腔和正共振腔三部分;所述的进气管插入同轴共振腔并与通气空腔的后板贯通,进气管的外壁与同轴共振腔的内壁密封连接,且进气管的管壁上开有径向共振孔;所述的正共振腔的侧壁为夹层,夹层内填充有一层吸声材料,吸声材料上轴向开有贯穿正共振腔的出气小管,通气空腔的前板开有连通正共振腔的轴向共振孔。它通过在方向和位置上错开两个共振腔,使消声频带变宽,同时共振腔之间的耦合作用小,消声效果好。
90 扬声器模组以及电子设备 PCT/CN2018/122026 2018-12-19 WO2019218667A1 2019-11-21 毛林进; 范双双; 董文强; 张凡; 李晓龙

发明公开一种扬声器模组以及电子设备,该模组包括模组壳体和扬声器单体,在所述模组壳体内设置有容纳腔和多个共振腔,所述扬声器单体被设置在所述容纳腔内,并将所述容纳腔分隔成前声腔和后声腔,所述前声腔通过出音口与外部空间连通;多个所述共振腔中至少两个共振腔串联连通、以及至少两个共振腔并联设置,所述串联连通的共振腔中的一个与所述前声腔连通,所述并联设置的共振腔相互隔离,且分别与所述前声腔连通。本发明通过设置串联和并联设置的共振腔能够提高扬声器模组的发声效果。

91 一种充气轮胎宽频噪音抑制构造 CN202110508487.4 2021-05-11 CN112976959B 2022-11-08 张永斌; 张振威; 张小正; 毕传兴
发明公开了一种充气轮胎宽频噪音抑制构造,其特征是:在由轮胎和轮辋形成的环形轮胎空腔内设置若干共振器组合体,共振器组合体安装在轮辋表面;各共振器组合体包括单腔共振器和双腔共振器,均为亥姆霍兹共振器;单腔共振器是由一个共振器空腔和一个连通孔构成,其连通孔将轮胎空腔和共振器空腔相连通;双腔共振器包括两个共振器空腔和两个连通孔,其中一个连通孔将轮胎空腔和相应的共振器相连通,另一连通孔将两个共振器空腔相连通。本发明将亥姆霍兹共振器进行串并联组合,将单频亥姆霍兹共振器产生的次级峰进一步降低,实现了在更宽频范围内降低轮胎空腔共振噪声,达到很好的降噪效果。
92 一种充气轮胎宽频噪音抑制构造 CN202110508487.4 2021-05-11 CN112976959A 2021-06-18 张永斌; 张振威; 张小正; 毕传兴
发明公开了一种充气轮胎宽频噪音抑制构造,其特征是:在由轮胎和轮辋形成的环形轮胎空腔内设置若干共振器组合体,共振器组合体安装在轮辋表面;各共振器组合体包括单腔共振器和双腔共振器,均为亥姆霍兹共振器;单腔共振器是由一个共振器空腔和一个连通孔构成,其连通孔将轮胎空腔和共振器空腔相连通;双腔共振器包括两个共振器空腔和两个连通孔,其中一个连通孔将轮胎空腔和相应的共振器相连通,另一连通孔将两个共振器空腔相连通。本发明将亥姆霍兹共振器进行串并联组合,将单频亥姆霍兹共振器产生的次级峰进一步降低,实现了在更宽频范围内降低轮胎空腔共振噪声,达到很好的降噪效果。
93 一种改进型亥姆霍兹共振器 CN201711423767.5 2017-12-25 CN108022581A 2018-05-11 陈兆基; 刘宏
发明涉及一种改进型亥姆霍兹共振器,属于振动噪声控制技术领域。所述共振器包括一个共振腔、一根连接管和一根主管路,共振腔通过连接管旁支于主管路;共振腔一处以上的内壁上设有空腔和凸起,构成连续起伏的形状。所述共振器通过改进共振腔体的阻抗特性,提高亥姆霍兹共振器的消声效果;可在相同声学指标的情况下,满足占用的安装空间更小要求。
94 一种通管道消声器 CN202111199211.9 2021-10-14 CN113915441B 2022-08-12 吴丰民; 柏春庚; 王军军; 杨彬
发明提供了一种通管道消声器,包括八个结构相同的共振腔单元,每个共振腔单元均包括中心管道、颈部空心圆盘、颈部狭缝、螺旋缝隙和环形空腔;第一至第四共振腔单元从外到内依次嵌套布置形成上共振腔组,第五至第八共振腔单元从外到内依次嵌套布置形成下共振腔组,上共振腔组和下共振腔组共用同一中心管道,中心管道的两端均伸出通风管道消声器的上下端面设置;上共振腔组的相邻两个共振腔单元之间以及下共振腔组的相邻两个共振腔单元之间在高度上均相差一个螺旋缝隙的螺距布置;通过在上共振腔组的圆柱形空腔开设环形缝隙连通四个共振腔单元的圆柱形空腔。本发明添加螺旋缝隙使其保持体积不变的同时,降低隔声峰值频率并提高隔声量。
95 一种通管道消声器 CN202111199211.9 2021-10-14 CN113915441A 2022-01-11 吴丰民; 柏春庚; 王军军; 杨彬
发明提供了一种通管道消声器,包括八个结构相同的共振腔单元,每个共振腔单元均包括中心管道、颈部空心圆盘、颈部狭缝、螺旋缝隙和环形空腔;第一至第四共振腔单元从外到内依次嵌套布置形成上共振腔组,第五至第八共振腔单元从外到内依次嵌套布置形成下共振腔组,上共振腔组和下共振腔组共用同一中心管道,中心管道的两端均伸出通风管道消声器的上下端面设置;上共振腔组的相邻两个共振腔单元之间以及下共振腔组的相邻两个共振腔单元之间在高度上均相差一个螺旋缝隙的螺距布置;通过在上共振腔组的圆柱形空腔开设环形缝隙连通四个共振腔单元的圆柱形空腔。本发明添加螺旋缝隙使其保持体积不变的同时,降低隔声峰值频率并提高隔声量。
96 一种洗衣机降低噪音方法 CN202110927507.1 2021-08-12 CN113862969A 2021-12-31 梅江龙; 陈斯匀; 王新明
发明公开了一种洗衣机降低噪音方法,在洗衣机箱体的至少一内侧壁上设置弹性消声瓦,所述弹性消声瓦中设有多排有规则排列分布的共振空腔,洗衣机箱体内的原始噪声传入至所述共振空腔,共振空腔发生共振,使进入共振空腔内的一部分原始噪声的频率发生变化以形成差频噪声,差频噪声反射回洗衣机箱体内对原始噪声产生干涉;同时共振空腔发生共振时也相应引起共振空腔内的空气发生共振,空气与共振空腔的内壁消声瓦产生摩擦,使另一部分原始噪声的声能转化为热能耗散,最终完成降低洗衣机噪音;本发明能够有效降低洗衣机的噪音。
97 扬声器模组以及电子设备 PCT/CN2017/102696 2017-09-21 WO2019019323A1 2019-01-31 高远; 李振军; 陈钢

发明公开了一种扬声器模组以及电子设备。该模组包括模组壳体和发声装置,在模组壳体内设置有容纳腔和多个共振腔,发声装置被设置在容纳腔内,发声装置将容纳腔分隔为前声腔和后声腔,前声腔通过出音口与外部空间连通;多个共振腔串联连通,多个共振腔中的一个与前声腔连通。多个共振腔串联在一起,能够提供一个宽频的杂音共振频段,这样能够吸收更宽频段的杂音。通过这种方式,串联连通的多个共振腔能够提高扬声器模组的发声效果。

98 一种宽频隔声超结构 CN202311114108.9 2023-08-31 CN117116240A 2023-11-24 颜猛; 查国涛; 郭福林; 董晓红; 杨涛; 周常荣; 贺才春
发明涉及噪声控制领域,具体提供了一种宽频隔声超结构,包括上局域共振薄板、下局域共振薄板和夹芯层。上局域共振薄板包括上面板和上共振质量体,下局域共振薄板包括下面板和下共振质量体,夹芯层连接于上共振质量体与下共振质量体之间,夹芯层分别与上面板和下面板之间形成空气夹层。夹芯层包括与上共振质量体连接的穿孔面板和位于穿孔面板下方的多个共振声腔组,每个共振声腔组均包括多个腔深不同且彼此独立的共振声腔通道,每个共振声腔通道与穿孔面板中的一个穿孔连通。本发明可提高整体宽频的隔声性能,有效拓宽吸声频率
99 可调带通滤波器 CN201380055643.X 2013-10-18 CN104756312A 2015-07-01 城山典久; 上田澄生; 佐佐木清丈; 宫本贵裕
发明包括:导电框体,该导电框体具有空腔共振器;导电盖,该导电盖覆盖所述空腔共振器;共振元件,该共振元件布置在所述空腔共振器中,所述共振元件的一端与所述框体连接,另一端是自由端;以及可移动导体,该可移动导体布置在所述共振元件的自由端和所述导电盖之间的空间中。因此,实现一种可调带通滤波器,它能够容易地改变空腔共振器的共振频率和空腔共振器之间的耦合量,并且该可调带通滤波器的成本低且具有简单的结构。
100 具有分隔颈部的声共振器 CN201710073823.0 2017-02-10 CN107061076B 2021-04-02 J.莱夫勒
一种用于减弱由发动机产生的声波的共振器包括共振器壳体和颈部。所述颈部包括从共振器壳体延伸的外部壳,其在共振器壳体和空气管道之间提供流体连通。所述颈部还包括布置在外部壳中的分割部。所述分割部与外部壳合作,以限定多个不同空气通道,每个空气通道与多个共振腔室的不同共振腔室流体连通。共振器可操作减弱或改变由发动机产生的声波的特征。
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