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    • 6. 发明公开
    • Self diagnostic ultrasonic imaging systems
    • Ultraschallabbildungssysteme mit Selbstdiagnosefunktion
    • EP0713102A1
    • 1996-05-22
    • EP95308179.1
    • 1995-11-15
    • ADVANCED TECHNOLOGY LABORATORIES, INC.
    • Burke, Thomas MichaelMehi, James
    • G01S7/52
    • G01S7/52079B06B1/0622B06B2201/40G01S7/52017G01S7/5205G01S15/8918G01S15/8979
    • A method and apparatus are described for testing the integrity of an ultrasonic transducer probe (10) or the ultrasound system connected to the probe. The elements of the transducer are pulsed at a time when the probe is not in contact with a patient and the surface of the probe lens is exposed to the open air. The channel electronics receives the echo signal returned from the lens-air interface and reverberations between this interface and the transducer. These signals are analyzed by a diagnostic processor (20) coupled to the channel electronics for characteristics such as amplitude, time of echo reception, group delay, and other characteristics to determine the possible existence of problems such as faulty transducer elements or connections and problems in the system receive electronics. The diagnostic processor can adaptively adjust an operating characteristic of the system electronics such as gain or time delay to compensate for a detected out of tolerance condition.
    • 描述了用于测试超声换能器探头(10)或连接到探头的超声系统的完整性的方法和装置。 当探头不与患者接触并且探针镜片的表面暴露于露天时,换能器的元件被脉冲。 通道电子设备接收从镜头 - 空中接口返回的回波信号和该接口与传感器之间的混响。 这些信号由耦合到信道电子设备的诊断处理器(20)进行分析,以获得诸如幅度,回波接收时间,组延迟和其它特性的特性,以确定可能存在诸如故障换能器元件或连接和问题的问题 系统接收电子设备。 诊断处理器可以自适应地调整系统电子设备的操作特性,例如增益或时间延迟,以补偿检测到的超出公差状况。
    • 7. 发明公开
    • Method for driving an ultrasonic transducer
    • 用于校准和驱动超声波传感器的控制系统
    • EP0424685A3
    • 1992-02-26
    • EP90118666.8
    • 1990-09-28
    • STORZ INSTRUMENT COMPANY
    • Williams, Daniel L, Jr.Kepley, Kevin P.Painter, John A.
    • B06B1/02A61F9/00
    • B06B1/0253A61B2017/00725A61B2017/00973A61F9/00745B06B2201/40B06B2201/76
    • An electronic control system for determining the resonant frequency of and driving ultrasonic transducers in a phacoemulsification probe used for ophthalmic surgery. The control system includes a voltage control led oscillator, power amplifier, power monitor, and automatic gain control circuit operating under the direction of command signals received from a microprocessor-based control console. The control system operates in a constant apparent power, direct drive mode with closed loop feedback maintaining the electrical power provided to the primary of a RLC transformer at the constant level requested by the command signals from the console. The frequency of the drive signal is held at the dominant resonant frequency of the ultrasonic transducer which is being driven by the control system. This resonant frequency is determined via a calibration procedure performed when the probe is first attached to the control system. During this procedure a constant voltage drive signal is swept through a range of frequencies and the electrical power consumed by the transducer is measured and stored at selected intervals such as 100 Hertz increments. The resonant frequency is also determined in part by looking for the frequency at which maximum power is consumed by the probe. The stored data is also subjected to other tests to cheok that the peak is indeed a resonant frequency and that the probe has selected output power characteristics about this resonant frequency thus helping to ensure that the probe is capable of operating satisfactorily when driven by the control system.