| With China has entered the aging society, the prevalence of cardiovasculardiseaseincreased year by year, so it is important to monitor the heart rate parameterseasily. The traditional medical measurements such as ECG machine are too bulky anddifficult to operation; while newly family-measuring methods can’t achieve reallymeasure anywhere or anytime due to the need to assisted by some professionalmeasuring instruments. Rapid development of the image processing technology andthe popularity of the Smart Phone allows it is possible to measure the heart rateparameter by a non-contact way. The client developed directly base on the Androidoperation system is more mobile, intuitive and affinitive. Therefore, the non-contactheart rate measurement software mentioned in this study has the advantages such asadvanced technology, low cost, easy operation and innovation. The research point willalso gradually become the trend of mobile medical products.Firstly, a comprehensive description of the current heart rate measurementproducts (including contact methods and non-contact methods) is mentioned. Thedescription is about the existing state, mainstream technology and performance. Basedon the comprehensive description, we elaborate the feasibility and innovation in ourdesign. In the last part of the First chapter, we introduce the main structure andcontent of this paper.Secondly, this article spent a whole chapter to describe the contents of theindependent component analysis (ICA) and four detail algorithms used in the ICAmethods. We focus our attention on the mathematical principle and derivationprocesses of the Joint Approximative Diagonaliation of the Eigen-matrix (JADE)algorithms. The second chapter work as a robust theoretical support for science andaccuracy of the core algorithm used in our measurement software. Besides, wespecialized use the excellent simulation ability of the MATLAB to validate thescience and accuracy of the algorithm at the result analysis sector.Then, for the purpose of software development, this article briefly explained the overall architecture of the Android platform, the function of (or between) each modulein the Android operation system and the basic software programming knowledge inAndroid. We will have a structural principle of Android by the third chapter.In the next chapter, we design and implement our heart rate measurementsoftware from general and specific level. We design architecture function of thesoftware based on overall level；then we blocked the software features and arrange thespecific process of each block. We combined the interaction between UI interface anddaemon service so as to make the software more applicable. We preprocess the inputdata before adopt the critical JADE algorithm process in order to improve theefficiency of the algorithm and the accuracy of the processing results.After then, we observe and analysis the output signals of JADE algorithm in thetime domain and frequency domain to find out the verification result for thetheoretical ICA image processing. In the penultimate chapter of this paper, we analyzethe results of the algorithm simulation under MATLAB, mobile software processingand the controlled group. By comparing the mobile phone program results with theresult of the controlled group, we make sure the accuracy of the measurementsoftware is enough to use as a gross measurement. We use a single variable method todetermine the impact factor of the accuracy by the results of MATLAB simulation andsmart phone process.Finally, we propose some improvement points and future endeavor orientation inour research based on the software measurement result and impact factors. |
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