公开(公告)号：US6131394A

公开(公告)日：2000-10-17

申请号：US120377

申请日：1998-07-21

申请人： Anthony D. Lavietes ,  Joseph Mauger ,  Eric H. Anderson

发明人： Anthony D. Lavietes ,  Joseph Mauger ,  Eric H. Anderson

IPC分类号： F04B39/00 ,  F16F15/02 ,  F25B9/14 ,  G05D19/02 ,  G10K11/178 ,  F25B9/00

CPC分类号： F16F15/02 ,  F04B39/0027 ,  G05D19/02 ,  G10K11/1784 ,  G10K11/1788 ,  F25B2500/13 ,  F25B9/14

摘要： A system and method of active vibration control of an electro-mechanically cooled device is disclosed. A cryogenic cooling system is located within an environment. The cooling system is characterized by a vibration transfer function, which requires vibration transfer function coefficients. A vibration controller generates the vibration transfer function coefficients in response to various triggering events. The environments may differ by mounting apparatus, by proximity to vibration generating devices, or by temperature. The triggering event may be powering on the cooling system, reaching an operating temperature, or a reset action. A counterbalance responds to a drive signal generated by the vibration controller, based on the vibration signal and the vibration transfer function, which adjusts vibrations. The method first places a cryogenic cooling system within a first environment and then generates a first set of vibration transfer function coefficients, for a vibration transfer function of the cooling system. Next, the cryogenic cooling system is placed within a second environment and a second set of vibration transfer function coefficients are generated. Then, a counterbalance is driven, based on the vibration transfer function, to reduce vibrations received by a vibration sensitive element.

摘要翻译： 公开了一种电机械冷却装置主动振动控制的系统和方法。 低温冷却系统位于环境中。 冷却系统的特征在于振动传递函数，这需要振动传递函数系数。 振动控制器响应各种触发事件产生振动传递函数系数。 环境可能因安装设备，靠近振动发生设备或温度而不同。 触发事件可能会启动冷却系统，达到工作温度或复位动作。 基于调节振动的振动信号和振动传递函数，平衡响应由振动控制器产生的驱动信号。 该方法首先将低温冷却系统放置在第一环境内，然后产生用于冷却系统的振动传递函数的第一组振动传递函数系数。 接下来，将低温冷却系统放置在第二环境内，并产生第二组振动传递函数系数。 然后，基于振动传递功能驱动平衡，以减少振动敏感元件所接收的振动。

公开(公告)号：US5757227A

公开(公告)日：1998-05-26

申请号：US689447

申请日：1996-08-12

申请人： James H. McQuaid ,  Anthony D. Lavietes

发明人： James H. McQuaid ,  Anthony D. Lavietes

IPC分类号： H03F3/08 ,  G06G7/12

CPC分类号： H03F3/082 ,  H03F2200/372

摘要： A low noise, low power consumption, compact, ambient temperature signal amplifier for a Cadmium Zinc Telluride (CZT) radiation detector. The amplifier can be used within a larger system (e.g., including a multi-channel analyzer) to allow isotopic analysis of radionuclides in the field. In one embodiment, the circuit stages of the low power, low noise amplifier are constructed using integrated circuit (IC) amplifiers , rather than discrete components, and include a very low noise, high gain, high bandwidth dual part preamplification stage, an amplification stage, and an filter stage. The low noise, low power consumption, compact, ambient temperature amplifier enables the CZT detector to achieve both the efficiency required to determine the presence of radio nuclides and the resolution necessary to perform isotopic analysis to perform nuclear material identification. The present low noise, low power, compact, ambient temperature amplifier enables a CZT detector to achieve resolution of less than 3% full width at half maximum at 122 keV for a Cobalt-57 isotope source. By using IC circuits and using only a single 12 volt supply and ground, the novel amplifier provides significant power savings and is well suited for prolonged portable in-field use and does not require heavy, bulky power supply components.

摘要翻译： 用于碲化锌碲化镉（CZT）辐射探测器的低噪声，低功耗，紧凑的环境温度信号放大器。 放大器可以在更大的系统（例如，包括多通道分析仪）中使用，以允许现场对放射性核素进行同位素分析。 在一个实施例中，低功率低噪声放大器的电路级使用集成电路（IC）放大器而不是分立元件构成，并且包括非常低的噪声，高增益，高带宽双分量前置放大级，放大级 ，和过滤器阶段。 低噪声，低功耗，紧凑的环境温度放大器使CZT检测器能够实现确定放射性核素的存在所需的效率以及执行同位素分析进行​​核材料识别所需的分辨率。 目前的低噪声，低功耗，紧凑的环境温度放大器使得CZT检测器能够在钴-57同位素源的122 keV下实现小于3％全宽的半高分辨率。 通过使用IC电路并仅使用单个12伏电源和地线，新型放大器可显着节省功耗，非常适合长时间的便携式现场使用，并且不需要庞大的电源组件。