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Electronic prototyping for cardiovascular health monitoring and postural analysis
2013 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

The microgravity in space affects the human body in many different ways, leading to postflight problems such as orthostatic intolerance and postural instability. Continuous monitoring is therefore becoming increasingly important, especially when related to the cardiovascular and vestibular system. Weight scales are ideal candidates for this type of monitoring due to their low cost and ease of use. In this thesis, the electronic design and experimental verification of a weight scale capable of cardiovascular health monitoring and postural analysis is presented. Ballistocardiography (BCG) circuits use strain gauges, amplifiers and filters to measure the forces exerted by accelerating blood onto the body, while an electrocardiography (ECG) circuit records the electrical activity of the heart with an innovative two-electrode set-up integrated with the scale. These circuits can be used to assess cardiovascular health. A two-electrode electromyography (EMG) circuit to monitor the electrical activity of the lower-body muscles may also be used in this system. A center of pressure (COP) circuit is described, based on a combination of analog-to-digital and digital-to-analog conversion. The EMG and COP circuits can be used in postural analysis. Designs for each of these circuits are presented, together with the design of a dedicated power supply circuit. The BCG, ECG and EMG circuits were assembled and tested, while the COP and power supply circuits are preliminary designs that will be assembled in the future. Tests with the BCG, ECG and EMG circuits provided signals corresponding to previous measurements with standard equipment. When combined with COP and power supply circuits, the systems developed in this thesis can be used for cardiovascular health monitoring and postural analysis, which has applications in both space physiology and clinical environments.

Place, publisher, year, edition, pages
2013. , 40 p.
Keyword [en]
Technology, BCG, COP, ECG, EMG, Space physiology, Weight scale
Keyword [sv]
URN: urn:nbn:se:ltu:diva-55794Local ID: c9d9c3bf-64b0-4812-b2dc-ffa23b9094dbOAI: diva2:1029178
External cooperation
Subject / course
Student thesis, at least 30 credits
Educational program
Space Engineering, master's level
Validerat; 20131028 (global_studentproject_submitter)Available from: 2016-10-04 Created: 2016-10-04Bibliographically approved

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