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Related Experiment Videos

Technical note: a mains drop-out simulator.

H M Norwood1

  • 1Medical Physics Department, St James's University Hospital, Leeds, UK.

Journal of Medical Engineering & Technology
|September 1, 1988
PubMed
Summary
This summary is machine-generated.

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A new circuit was developed to test equipment susceptibility to brief power interruptions, or

Area of Science:

  • Biomedical Engineering
  • Electrical Engineering
  • Medical Equipment Testing

Background:

  • Investigating mains-borne and radiated interference in hospital ultrasound departments is crucial for equipment reliability.
  • Brief power supply failures, termed 'drop-outs', can impact sensitive medical equipment performance.
  • Assessing equipment susceptibility to power fluctuations is essential for maintaining diagnostic accuracy and patient safety.

Purpose of the Study:

  • To develop a reliable method for simulating brief mains power supply interruptions.
  • To evaluate the susceptibility of medical equipment to transient power failures.
  • To ensure the operational integrity of ultrasound equipment in a hospital setting.

Main Methods:

  • A novel circuit was designed and constructed to induce controlled mains power 'drop-outs'.

Related Experiment Videos

  • The circuit utilizes a solid-state relay (SSR) for precise switching at zero-crossing points.
  • The system allows for adjustable drop-out duration (up to 15 half-cycles) and repetition rates (0.4-6.5 Hz).

    • Main Results:

    • The developed circuit successfully simulates brief power interruptions with adjustable parameters.
    • The use of a zero-crossing SSR simplifies design and ensures clean switching.
    • The system provides a repeatable method for testing equipment resilience to power anomalies.

    Conclusions:

    • The new circuit is an effective tool for assessing medical equipment's tolerance to transient power supply failures.
    • This testing capability is vital for maintaining the reliability of ultrasound equipment in clinical environments.
    • Ensuring equipment robustness against power disturbances enhances patient safety and diagnostic service continuity.