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    • 1. 发明申请
    • Heteropolymeric Polyimide Polymer Compositions
    • 异聚酰亚胺聚合物组合物
    • US20080214777A1
    • 2008-09-04
    • US11997124
    • 2006-08-01
    • Garrett D. Poe
    • Garrett D. Poe
    • C08G73/10
    • C08G73/1042C08G73/1014C08G73/1017C08G73/1039
    • The present disclosure describes comprises a polyimide composition comprising at least one diamine monomer and at least two dianhydride monomer types, at least two diamine monomer types and at least one dianhydride monomer at least two diamine monomer types and at least two dianhydride monomer types. In one embodiment, the diamine monomers are 2,2-bis[4-(4aminophenoxy)phenyl]-hexafluoropropane (BDAF) or 4,4′-diaminobenzanilide (DABA) or combinations of the foregoing and the dianhydride monomers are 4,4′-(hexafluoroisopropylidene)di-phthalicanhydride (6-FDA) and 3,3′,4,4′-biphenyltetracarboxylic acid dianhydride (s-BDPA) or combinations of the foregoing. The polyimide compositions described herein have controllable and variable properties, such as but not limited to CTE, allowing the use of the polyimide compositions in a wide variety of applications.
    • 本公开描述包括聚酰亚胺组合物,其包含至少一种二胺单体和至少两种二酐单体类型,至少两种二胺单体类型和至少一种二酐单体至少两种二胺单体类型和至少两种二酐单体类型。 在一个实施方案中,二胺单体是2,2-双[4-(4-氨基苯氧基)苯基] - 六氟丙烷(BDAF)或4,4'-二氨基苯甲酰苯胺(DABA)或前述的组合,二酐单体是4,4' - (六氟异亚丙基)二邻苯二甲酸酐(6-FDA)和3,3',4,4'-联苯四羧酸二酐(s-BDPA)或前述的组合。 本文描述的聚酰亚胺组合物具有可控和可变的性质,例如但不限于CTE,允许在各种应用中使用聚酰亚胺组合物。
    • 7. 发明授权
    • Combined UV/IR flame detection system
    • 组合UV / IR火焰检测系统
    • US5339070A
    • 1994-08-16
    • US915617
    • 1992-07-21
    • Jeffrey S. YalowitzJames M. MorrisonHilary E. Roberts
    • Jeffrey S. YalowitzJames M. MorrisonHilary E. Roberts
    • F23N5/08G08B17/12
    • F23N5/082F23N2023/06F23N2023/08
    • A flame detector unit contains a silicon photodiode that is sensitive to UV light waves and two lead selenide photoresistors that are sensitive to IR light waves. The electromagnetic bandwidth of each sensor element is restricted by an optical wave filter to pass photons of certain wavelengths characteristic of hydrocarbon flames and to discriminate against photons of other wavelengths. Signals generated by the IR sensors are in the form of variations in electrical resistance of the sensor elements, which together with a resistor network comprise a bridge circuit which combines the two IR signals so as to discriminate against blackbody radiation sources and provide a signal which is fed through an amplifier. Amplified UV and IR signals are fed to a common analog to digital converter (ADC). Output from the ADC is fed to a digital processor through a notch filter, a cluster of weighted-moving-average filters, and into a threshold comparator/tester. Output from the comparator/tester is fed to a correlator, then through a series of alarm decision making circuits and finally into a series of alarm activation circuits. Stored wave forms relating to profiles of fire characteristics may be fed to the circuit correlator from an outside source. Data from predetermined external measurements may be fed to the alarm decision making circuits.
    • 火焰检测器单元包含对UV光波敏感的硅光电二极管和对IR光波敏感的两个铅硒化物光敏电阻。 每个传感器元件的电磁带宽由光波滤波器限制,以传递特征为烃火焰特性的光子,并与其他波长的光子进行区别。 由IR传感器产生的信号是传感器元件的电阻变化的形式,其与电阻器网络一起包括组合两个IR信号的桥接电路,以便区分黑体辐射源并提供信号 通过放大器馈电。 放大的UV和IR信号被馈送到公共模数转换器(ADC)。 来自ADC的输出通过陷波滤波器,一组加权移动平均滤波器馈送到数字处理器,并进入阈值比较器/测试器。 比较器/测试仪的输出馈送到相关器,然后通过一系列报警决定电路,最后进入一系列报警启动电路。 与火灾特征曲线相关的存储波形可以从外部源馈送到电路相关器。 来自预定外部测量的数据可以馈送到报警决策电路。