Glass-type wireless PPG measuring system

Abstract

This paper is about a glass-type wireless bio-signal transmitter that can monitor the user's health state in daily life. The device implemented in this study consists of the transmission part and the receiving part. The transmission part includes a photoplethysmography(PPG) sensor for detecting pulse wave signals, accelerometer for detecting kinetic signals, and a wireless controller for transmitting acquired bio-information. The receiving part is designed to check and process transmitted data through interoperation with a PC. In the experiments, we collected data during a sitting posture and repeated sit-to-stand motion in laboratory environment, and analyzed the data. As to accuracy, the correlation between the peak-to-peak intervals in the signals of the Biopac equipment and the developed device measured in a sitting posture was 97.5%, and that measured in sit-to-stand motion was 87%. In addition, when bio-signals were transmitted through wireless communication, the transmission was successful 100% without any error. When pulse wave signals and kinetic signals were obtained and compared, the results proved the accuracy and daily applicability of the developed device, and the glass-type wireless bio-signal transmission system is expected to be applicable to unobtrusive health monitoring for the user.

Wearable Photoplethysmographic Sensors—Past and Present

“…Commercial clinical PPG sensors commonly use the finger, earlobe and forehead [31]. In addition, use of a glass-type wireless PPG has been examined [32].…”

“…Glass-type PPG sensors have also been investigated. A reflectance mode-PPG sensor, equipped with an accelerometer for detecting kinetic signals and a wireless controller for transmitting both signals to the receiver installed on the frame of the glass, was used to obtain PPG data from a user performing alternating sitting and sit-to-stand motions-the correlation between the peak-to-peak intervals in the signals of a BIOPAC device and the developed device was 97.5% and 87% for sitting and the sit-to-stand motion, respectively, given 100% data transmission without error [32].…”

Current progress of photoplethysmography and SPO2 for health monitoring

“…Commercial clinical PPG sensors commonly use the finger, earlobe, and forehead [50]. In addition, use of a glass-type wireless PPG has been explored [51].…”

Is Continuous Heart Rate Monitoring of Livestock a Dream or Is It Realistic? A Review

“…It can be used on a variety of measurement sites, which offer higher perfusion values, including finger [30,31], wrist, earlobe [32], external ear cartilage [33], superior auricle [34], inferior auricle [35], forehead [36], and brachia [37]. Such devices are commonly incorporated with ear-worn devices [33,34,38], finger probes [39], flexible films or patches [40,41], and glass-type wireless PPG [42]. Tables 2 and 3 provide detailed comparisons of some significant contributions for HR monitoring on a portion of the above-mentioned measurement sites (finger and ear), including light wavelength, movement of the subjects when measuring, power consumption, and quantitative results (accuracy), which are compared to gold standard methods (conventional PPG or ECG).…”