Provided is an optical circulation measurement device with which a simple configuration and process are implemented. A signal processing device comprises: a light emitting unit which outputs an optical signal including light of a plurality of different wavelengths a light receiving unit which receives either transmitted or reflected light of the optical signal of the light emitting unit via a human body, and selectively receives the light of a plurality of different wavelengths and a signal processing unit which executes a signal process on an electrical signal which corresponds to a received light signal of the light receiving unit. The light emitting unit further comprises a white LED as a light emitting element. The light receiving unit further comprises a blue photodiode and a red photodiode. The signal processing unit receives input of the electrical signal based on the received light signal corresponding to the light of the plurality of different wavelengths, removes noise caused by bodily movement, and generates a detection signal of blood oxygen concentration, etc.〔摘要〕提供一種實現簡易構成與處理的光學式血流計測裝置。具有:發光部,係輸出含有複數不同波長之光的光訊號;和受光部,係為將發光部之發光訊號透過人體的穿透光或反射光予以受光的受光部,並且會將不同之複數波長光予以選擇受光;和訊號處理部,係對於受光部之受光訊號所對應之電氣訊號,執行訊號處理。發光部係具備白色LED來作為發光元件,受光部係為具備藍色光二極體與紅色光二極體之構成,訊號處理部係輸入以對應於複數不同波長光之受光訊號為基礎的電氣訊號並進行起因於體動的雜訊之去除,生成血氧濃度的偵測訊號等。20‧‧‧光學式血流偵測裝置21‧‧‧發光部22‧‧‧受光部23‧‧‧增幅部24‧‧‧訊號處理部30‧‧‧生物組織50‧‧‧生物訊號
