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    • 7. 发明申请
    • PROCESS AND DEVICE FOR THE WAVE OR VAPOUR-PHASE SOLDERING OF ELECTRONIC UNITS
    • METHOD AND APPARATUS FOR波和/或电子部件汽相焊接
    • WO1996037330A1
    • 1996-11-28
    • PCT/DE1996000968
    • 1996-05-24
    • FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.SCHEEL, WolfgangRING, KarlHAFNER, WilliLEICHT, Helmut
    • FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
    • B23K01/015
    • B23K1/015B23K2101/40H05K3/3415H05K3/3468H05K3/3494H05K2203/088
    • The invention describes a process and a device for wave and/or reflow soldering in the form of vapour-phase soldering for electronic units. In prior art processes and devices, either wave soldering or vapour-phase soldering alone can be performed in a single chamber. For electronic units which contain both components which are to be wave soldered and those to be reflow soldered, at least two soldering devices and two process steps are necessary. There is the further drawback that temperature-sensitive components impose either a limitation on the soldering temperature and hence the solders which can be used or laborious post-fitting. The invention performs wave soldering and vapour-phase soldering as a form of reflow soldering in a single chamber, in which an electronic unit can be placed and/or the portion of the volume of the chamber filled with the saturated vapour of a primary fluid can be controlled in such a way that, at the worst, temperature-sensitive components of the unit lie only partly in the saturated vapour and the connections of the electronic components of the unit are in the saturated vapour during soldering. The invention permits the soldering of surface-fitted, penetrating and temperature-sensitive components, e.g. large electrolytic capacitors, in a single chamber and in a single process stage and is therefore eminently suitable for economical mass production with high soldering quality.
    • 本发明描述的方法和在用于电子组件汽相焊接的形式波和/或回流焊接的装置。 在在一个单一的室中仅波峰焊或仅气相焊接已知方法和装置或者是可行的。 对于包含于波峰焊和回流焊接两个部件的电子组件,从而至少两个焊接设备,因此需要两个工艺步骤。 还存在温度敏感设备或者需要在钎焊温度的限制,因此为所述可选择的焊接材料,或进行复杂的改造必要的缺点。 本发明实现了波峰焊和汽相焊接作为在单一腔室回流焊接的形式中,电子组件可被放置成和/或填充有所述室的主液体体积分数的饱和蒸汽被如此调节使得组件中的温度敏感元件至多部分地 位于饱和蒸汽,并且该连接被焊接模块的电子部件的软钎焊过程中位于饱和蒸汽。 本发明允许安装面的焊接,通过配合和温度敏感的组分,例如 大电解电容器,在一个单一的腔室,并在单一的工艺步骤,并且因此非常适合于廉价的大量生产具有非常好的焊接质量。
    • 9. 发明申请
    • METHOD AND DEVICES FOR CODING DISCRETE SIGNALS OR FOR DECODING CODED DISCRETE SIGNALS
    • 编码离散信号的方法和装置或 TO地解码编码离散信号
    • WO1998037544A1
    • 1998-08-27
    • PCT/EP1997006633
    • 1997-11-28
    • FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.GRILL, BernhardEDLER, BerndBRANDENBURG, Karlheinz
    • FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
    • G10L09/14
    • G10L19/24G10L19/0204
    • The invention relates to a method for coding discrete time signals (x1) sampled at a first sampling rate. According to said method second time signals (x2) are generated using the first time signals, the band width of which corresponds to a second sampling rate which is lower than the first. The second time signals are coded in accordance with a first coding algorithm. The coded second time signals (x2c) are decoded again so as to obtain coded/decoded second time signals (x2cd), the band width of which corresponds to the second sampling rate. The first time signals are transformed by frequency range transformation into first spectral values (X1). From the coded/decoded second time signals second spectral values (X2cd) are generated, which are a representation of the coded/decoded second time signals in the frequency range. To obtain weighted spectral values the first spectral values are weighted with the second spectral values, whereby the first and second spectral values have the same frequency and time resolution. The weighted spectral values (Xb) are coded, taking into consideration a psychoacoustic model, in accordance with a second coding algorithm and entered into a bit stream.
    • 在用于编码的离散在第一抽样时间的信号采样的方法,(X1)产生使用所述第一时间信号,其带宽相应于第二采样率,其中,所述第二采样率小于所述第一取样率的第二时间信号(×2)。 第二定时信号是根据第一编码算法进行编码。 的经编码的第二信号(X2C)是为了获得编码再次解码/解码后的第二时间信号(X2CD),其带宽相应于第二采样频率。 第一时间信号由频域变换到所述第一频谱值(X1)。 第二频谱值(X2CD)从编码/解码的第二时间信号产生,所述第二频谱值是在频域中对编码/解码的第二时间信号的表示。 为了获得光谱额定第一频谱值在第二频谱值,其中所述第一和所述第二频谱值具有相同的频率和时间分辨率来测量。 加权频谱值(XB)根据第二编码算法考虑到心理声学模型的编码,并被写入到比特流中。