Abstract:To study the measurement method of the performance of blood oxygen saturation parameters of wearable smart bracelets, for the low accuracy and lack of evaluation methods for the existing wearable smart bracelets. Based on the photo plethysmography measurement principle of blood oxygen saturation, we take four brands including PULEEBUMG (PBPQ1-S), Kangdao (KV5), DOOMUFIT (H207) and Dotlink (B70) and test the blood oxygen saturation by using the multifunctional physiological signal tester. Finally, we provide an example of uncertainty assessment for the blood oxygen saturation measurement of wearable smart bracelets. The results show that, the performance of the blood oxygen saturation parameters of the wearable smart bracelets can be evaluated in a certain degree, and the traceability is achievable, by comparing the blood oxygen saturation of the four wearable smart bracelets with the corresponding reference values.