A Study of New Pulse Auscultation System
This study presents a new type of pulse auscultation system, which uses a condenser microphone to measure pulse sound waves on the wrist, captures the microphone signal for filtering, amplifies the useful signal and outputs it to an oscilloscope in analog form for waveform display and storage and de...
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| Format: | Article |
| Language: | English |
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MDPI AG
2015-04-01
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| Series: | Sensors |
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| Online Access: | http://www.mdpi.com/1424-8220/15/4/8712 |
| _version_ | 1811301518972813312 |
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| author | Ying-Yun Chen Rong-Seng Chang |
| author_facet | Ying-Yun Chen Rong-Seng Chang |
| author_sort | Ying-Yun Chen |
| collection | DOAJ |
| description | This study presents a new type of pulse auscultation system, which uses a condenser microphone to measure pulse sound waves on the wrist, captures the microphone signal for filtering, amplifies the useful signal and outputs it to an oscilloscope in analog form for waveform display and storage and delivers it to a computer to perform a Fast Fourier Transform (FFT) and convert the pulse sound waveform into a heartbeat frequency. Furthermore, it also uses an audio signal amplifier to deliver the pulse sound by speaker. The study observed the principles of Traditional Chinese Medicine’s pulsing techniques, where pulse signals at places called “cun”, “guan” and “chi” of the left hand were measured during lifting (100 g), searching (125 g) and pressing (150 g) actions. Because the system collects the vibration sound caused by the pulse, the sensor itself is not affected by the applied pressure, unlike current pulse piezoelectric sensing instruments, therefore, under any kind of pulsing pressure, it displays pulse changes and waveforms with the same accuracy. We provide an acquired pulse and waveform signal suitable for Chinese Medicine practitioners’ objective pulse diagnosis, thus providing a scientific basis for this Traditional Chinese Medicine practice. This study also presents a novel circuit design using an active filtering method. An operational amplifier with its differential features eliminates the interference from external signals, including the instant high-frequency noise. In addition, the system has the advantages of simple circuitry, cheap cost and high precision. |
| first_indexed | 2024-04-13T07:10:24Z |
| format | Article |
| id | doaj.art-a32b5c8f7a13477da35b4c5c611357df |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-13T07:10:24Z |
| publishDate | 2015-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-a32b5c8f7a13477da35b4c5c611357df2022-12-22T02:56:53ZengMDPI AGSensors1424-82202015-04-011548712873110.3390/s150408712s150408712A Study of New Pulse Auscultation SystemYing-Yun Chen0Rong-Seng Chang1Department of Optics and Photonics, National Central University, No. 300, Jhongda Rd, Taoyuan 32001, TaiwanDepartment of Optics and Photonics, National Central University, No. 300, Jhongda Rd, Taoyuan 32001, TaiwanThis study presents a new type of pulse auscultation system, which uses a condenser microphone to measure pulse sound waves on the wrist, captures the microphone signal for filtering, amplifies the useful signal and outputs it to an oscilloscope in analog form for waveform display and storage and delivers it to a computer to perform a Fast Fourier Transform (FFT) and convert the pulse sound waveform into a heartbeat frequency. Furthermore, it also uses an audio signal amplifier to deliver the pulse sound by speaker. The study observed the principles of Traditional Chinese Medicine’s pulsing techniques, where pulse signals at places called “cun”, “guan” and “chi” of the left hand were measured during lifting (100 g), searching (125 g) and pressing (150 g) actions. Because the system collects the vibration sound caused by the pulse, the sensor itself is not affected by the applied pressure, unlike current pulse piezoelectric sensing instruments, therefore, under any kind of pulsing pressure, it displays pulse changes and waveforms with the same accuracy. We provide an acquired pulse and waveform signal suitable for Chinese Medicine practitioners’ objective pulse diagnosis, thus providing a scientific basis for this Traditional Chinese Medicine practice. This study also presents a novel circuit design using an active filtering method. An operational amplifier with its differential features eliminates the interference from external signals, including the instant high-frequency noise. In addition, the system has the advantages of simple circuitry, cheap cost and high precision.http://www.mdpi.com/1424-8220/15/4/8712pulse, auscultation, condenser microphone |
| spellingShingle | Ying-Yun Chen Rong-Seng Chang A Study of New Pulse Auscultation System Sensors pulse, auscultation, condenser microphone |
| title | A Study of New Pulse Auscultation System |
| title_full | A Study of New Pulse Auscultation System |
| title_fullStr | A Study of New Pulse Auscultation System |
| title_full_unstemmed | A Study of New Pulse Auscultation System |
| title_short | A Study of New Pulse Auscultation System |
| title_sort | study of new pulse auscultation system |
| topic | pulse, auscultation, condenser microphone |
| url | http://www.mdpi.com/1424-8220/15/4/8712 |
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