APPARATUS AND METHOD FOR ADAPTING A PIEZOELECTRIC RESPIRATORY SENSING BELT TO A RESPIRATORY INDUCTANCE PLETHYSMOGRAPHY POLYSOMNOGRAPH
    2.
    发明申请
    APPARATUS AND METHOD FOR ADAPTING A PIEZOELECTRIC RESPIRATORY SENSING BELT TO A RESPIRATORY INDUCTANCE PLETHYSMOGRAPHY POLYSOMNOGRAPH 有权
    用于将压电式呼吸感测带适配到呼吸电感吸附聚合物聚合物的装置和方法

    公开(公告)号:US20140330156A1

    公开(公告)日:2014-11-06

    申请号:US14268429

    申请日:2014-05-02

    IPC分类号: A61B5/113 A61B5/00

    摘要: Circuits for rendering piezo-based respiratory belts compatible with polysomnograph (PSG) machines designed for use with respiratory induction belts (RIPs) comprise an instrumentation amplifier adapted to be connected to a piezoelectric transducer and providing an AC output signal to a low-pass filter. In a first embodiment, the low-pass filter output is applied to an input of a microcontroller's A to D converter and the resulting digitized samples are used to vary the resistance of a digital potentiometer whose wiper terminal is coupled in series with an inductor so as to emulate the presence of a RIP belt to the PSG machine. In a second embodiment, the low-pass filter output is used to drive the primary of a transformer so as to vary the permeability of the transformer's ferrite core in a way that emulates the performance of a RIP belt to the PSG.

    摘要翻译: 用于渲染与为呼吸感应带(RIP)使用的多导航测井仪(PSG)机器兼容的压电式呼吸带的电路包括适于连接到压电换能器并向低通滤波器提供交流输出信号的仪表放大器。 在第一实施例中,低通滤波器输出被施加到微控制器的A到D转换器的输入端,并且所得到的数字化样本用于改变数字电位器的电阻,其数量电位器的擦拭器端子与电感器串联耦合,以便 以模拟RIP皮带到PSG机器的存在。 在第二实施例中,低通滤波器输出用于驱动变压器的初级,以便以模拟RIP带对PSG的性能的方式改变变压器的铁氧体磁心的磁导率。