The phasor concept. Phasor relationships for R, L and C elements. Circuit laws using phasors. AC power. Instantaneous power. Average power. Effective value of a sinusoidal waveform. Maximum power transfer and conjugate matching. The transformer. Using transformers in circuit matching.
ELECTRONIC DEVICES AND CIRCUITS
Semiconductors, conductors and insulators. Conduction in semiconductors. N-type and P-type semiconductors. The PN junction. Biasing the PN junction, current voltage characteristics. The PN diode, ideal and practical models. The Zener diode. Optical diodes. Bipolar Junction Transistor (BJT) and Field Effect Transistor (FET). Basic operation, characteristics, parameters and biasing. The transistor as an amplifier. The transistor as a switch. Transistor packages.
GENERAL PRINCIPLES OF MEASUREMENT AND INSTRUMENTATION
Purpose, structure and classification of measurement systems. Systematic characteristics (range and span, errors and accuracy, linearity, sensitivity and hysteresis). Noise and noise reduction. Calibration, traceability and standards. Power supplies, regualtion and isolation.
Introduction of a range of sensors and transducers. Resistive sensors. Capacitive sensors. Ultrasonic sensors. Electromagnetic sensors. Optical sensors. Radiological sensors. Semiconductor sensing elements. Measurement of temperature, pressure, displacement, force and flow.
Body temperature. The circulation, blood flow and blood pressure. Muscles and the EMG.The heart, the ECG and micovolt cardiac potentials. Speech and speech therapy. Hearing and audiology.
Special requirements for medical instrumentation – size and weight, noise, isolation, and safety. Physiological measurement examples – temperature, flow, EMG, ECG, Audiometry, instrumentation for Speech Therapy. Regulatory and manufacturing requirements – CE marking and MHRA Medical Device Registration.
EXAMPLES CLASS – GENERAL PRINCIPLES OF MEASUREMENT AND INSTRUMENTATION
Two assessed classes.
EXAMPLES CLASS – SENSING DEVICES
Two assessed classes.
EXAMPLES CLASS – PHYSIOLOGICAL SIGNALS
An unassessed demonstration of examples of physiological measurement.
Contact hours 40, consisting of:
35 hours lectures
5 hours examples classes.
Only available to students on programmes owned by The School of Engineering and Digital Arts
Method of assessment
See the library reading list for this module (Canterbury)
Have an understanding of the principles of physiological measurement and instrument design.
2. Have knowledge of specific examples of physiological parameters and their measurement.
3. Have the necessary skills to design and analyse electronic instruments.
4. Develop an appreciation of the regulatory and safety issues relating to medical devices.
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Credit level 5. Intermediate level module usually taken in Stage 2 of an undergraduate degree.
- ECTS credits are recognised throughout the EU and allow you to transfer credit easily from one university to another.
- The named convenor is the convenor for the current academic session.
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