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    • 3. 发明授权
    • Method for self-test of defibrillation and pacing circuits including a patient isolation switch
    • 包括患者隔离开关在内的除颤和起搏回路自检的方法
    • US07096062B2
    • 2006-08-22
    • US10141687
    • 2002-05-07
    • Patrick F. KellyPaul S. TamuraPatricia EwenMichelle C. Beyersdorf
    • Patrick F. KellyPaul S. TamuraPatricia EwenMichelle C. Beyersdorf
    • A61N1/08
    • A61N1/3931A61N1/3912
    • A method and apparatus for performing self-tests on defibrillation and pacing circuits including a patient isolation switch is disclosed. Tests are provided for the defibrillation and pacing circuitry as well as the isolation switch. For testing the defibrillation circuitry, the impedance drive circuits and preamplifier may be utilized such that the energy storage capacitor is not required to be charged and discharged during the test, thus conserving energy. For testing the pacing circuitry and the isolation switch, the defibrillation circuitry is utilized. For certain of the tests, the test stimulus is the output voltage on the energy storage capacitor, while for other tests the test stimulus may be the pace current as indicated by the voltage across the input to the preamplifier. Alternative tests may be performed depending on whether the impedance at the output of the defibrillator is determined to be an open circuit or a short circuit.
    • 公开了一种在包括病人隔离开关的除颤和起搏电路上执行自检的方法和装置。 为除颤和起搏电路以及隔离开关提供了测试。 为了测试除颤电路,可以利用阻抗驱动电路和前置放大器,使得在测试期间不需要对储能电容器进行充电和放电,从而节省能量。 为了测试起搏电路和隔离开关,利用除颤电路。 对于某些测试,测试刺激是储能电容器上的输出电压,而对于其他测试,测试激励可以是由前置放大器的输入端两端的电压所示的速度电流。 可以根据除颤器输出端的阻抗是否被确定为开路还是短路来进行替代测试。
    • 8. 发明授权
    • Controller for resistive heating element
    • 电阻加热元件控制器
    • US4523084A
    • 1985-06-11
    • US298796
    • 1981-09-02
    • Paul S. TamuraRobert J. Strehlow
    • Paul S. TamuraRobert J. Strehlow
    • H05B3/00G05D23/24H05B1/02
    • G05D23/2401Y10T307/773
    • The controller of the present invention regulates the flow of current through a resistive heating element by computing the predicted resistance R.sub.hot of the heating element at the desired temperature and then adjusting the voltage drop across and current flow through the resistive heating element until the relationship V=IR.sub.hot is satisfied. In an analog embodiment of the present invention, measurement of the voltage drop is obtained from a voltage amplifying circuit connected across the resistive heating element, while a measure of the current flow through the resistive heating element is obtained from a current amplifying circuit connected across a current measuring resistor in series with the resistive heating element. The output of the current amplifying circuit is multiplied by first and second variable gain amplifier circuits to produce a signal output representing the product of the current flow and the predicted resistance at the desired temperature. The signal from the voltage amplifying circuit and the product-representative signal from the two variable gain amplifier circuits are balanced in a control amplifier to produce a control signal having a value which varies as a function of the difference between the voltage-representative signal and the product-representative signal. The control signal is thereafter utilized to adjust the voltage drop across the resistive heating element until the current through the resistive heating element multiplied by the predicted resistance at the desired temperature, i.e., the product-representative signal, equals the voltage drop across the resistive heating element.
    • 本发明的控制器通过计算在期望温度下的加热元件的预测电阻Rhot,然后调节跨过电阻加热元件的电压和电流流动,调节通过电阻加热元件的电流流动直到V = IRhot满意 在本发明的模拟实施例中,从连接在电阻加热元件两端的电压放大电路获得电压降的测量,而通过电阻加热元件的电流的测量是从连接在电阻加热元件上的电流放大电路获得的 电流测量电阻与电阻加热元件串联。 电流放大电路的输出与第一和第二可变增益放大器电路相乘,以产生表示电流和所需温度下的预测电阻的乘积的信号输出。 来自电压放大电路的信号和来自两个可变增益放大器电路的乘积代表信号在控制放大器中被平衡以产生控制信号,该控制信号的值随着电压代表信号和 产品代表信号。 此后,控制信号用于调节电阻加热元件两端的电压降,直到通过电阻加热元件的电流乘以所需温度下的预测电阻即产品代表信号等于电阻加热两端的电压降 元件。
    • 10. 发明授权
    • Current controller for resistive heating element
    • 电阻加热元件电流控制器
    • US4549073A
    • 1985-10-22
    • US319101
    • 1981-11-06
    • Paul S. TamuraRobert J. Strehlow
    • Paul S. TamuraRobert J. Strehlow
    • G05D23/24H05B1/02
    • G05D23/2401
    • A controller for regulating current flow through a resistive heating element in order to adjust the temperature thereof is disclosed. The controller includes a means for periodically measuring the resistance of the heating element. During controller calibration, the rate of change of the measured heating element resistance is ascertained in order to determine whether the heating element is at ambient temperature. Computations are performed on the value of the measured heating element resistance associated with ambient temperature conditions, enabling the controller to predict the value of the heating element resistance at a desired temperature. Current is then conducted through the heating element to generate heat, while periodic measurements of the heating element resistance are performed. The resistance values obtained during these latter resistance measurements are compared with the predicted resistance of the heating element associated with the desired temperature and the difference between the predicted resistance and each measured resistance is used to generate a control signal which regulates the flow of heating current through the heating element until desired temperature is reached.
    • 公开了一种用于调节电流流过电阻加热元件以调节其温度的控制器。 控制器包括用于周期性地测量加热元件的电阻的装置。 在控制器校准期间,确定测量的加热元件电阻的变化率,以便确定加热元件是否处于环境温度。 根据与环境温度条件相关的测量的加热元件电阻的值执行计算,使得控制器能够预测在所需温度下的加热元件电阻的值。 然后通过加热元件导通电流以产生热量,同时执行加热元件电阻的周期性测量。 将这些后面的电阻测量期间获得的电阻值与与期望温度相关联的加热元件的预测电阻进行比较,并且使用预测电阻和每个测量电阻之间的差来产生控制信号,该控制信号调节加热电流流过 加热元件达到所需温度。