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Related Experiment Videos

Sweep-frequency marker generator for blood pressure transducer testing.

A S Lee

    Journal of Clinical Engineering
    |June 10, 1983
    PubMed
    Summary

    A new circuit accurately calibrates swept-frequency recordings for biological transducers. This system provides precise frequency markers for testing, enhancing the reliability of measurements from devices like blood pressure transducers.

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    Area of Science:

    • Biomedical Engineering
    • Signal Processing
    • Instrumentation

    Background:

    • Accurate frequency calibration is crucial for biological transducer testing.
    • Existing methods may lack precision or broad applicability.
    • Swept-frequency recordings are common in biological measurements.

    Purpose of the Study:

    • To present a novel circuit for accurate frequency calibration of swept-frequency recordings.
    • To demonstrate its utility in calibrating direct blood pressure transducers.
    • To highlight its potential for testing diverse biological transducers.

    Main Methods:

    • The circuit measures periods between successive zero crossings.
    • It generates distinct pulses for recording on strip charts.

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  • A series of sixteen marker pulses denote specific frequencies from 1 Hz to 128√2 Hz.

    • Main Results:

    • The circuit provides accurate frequency calibrations across a wide range (1 Hz to 128√2 Hz).
    • Sixteen marker pulses, including a unique 16 Hz pulse, ensure clear identification.
    • The generated pulses are directly recordable on swept-frequency strip charts.

    Conclusions:

    • The presented circuit offers a reliable and versatile solution for frequency calibration in biological transducer testing.
    • It enhances the accuracy and applicability of swept-frequency analysis.
    • This technology has significant implications for biomedical instrumentation and research.