PROBLEM TO BE SOLVED: To achieve a highly accurate blood sugar level measurement with small measurement error by light sensing using a phase shif method despite a non-invasive measurement.SOLUTION: A blood sugar level measuring apparatus 10 includes: a photosensor 11 a sensor circuit 12 for driving the photosensor 11 an operation unit 13 to be connected to the sensor circuit 12 and a computer 14 to be connected to the operation unit 13. On the basis of relation data obtained by associating the blood sugar level with a frequency change, a blood sugar level calculation section 32 of the operation unit 13 calculates a blood sugar level of a living body from frequency that has been converted by a phase shift circuit 30 of the operation unit 13 and measured by a frequency counter 31.COPYRIGHT: (C)2014,JPO&INPIT【課題】位相シフト法を用いた光センシングによって、非侵襲的測定でありながら測定誤差が小さく高精度な血糖値測定を可能とする。【解決手段】血糖値測定装置10は、光センサ11と、光センサ11を駆動させるセンサ回路12と、センサ回路12に接続される演算部13と、演算部13に接続されるコンピュータ14とを備える。演算部13の血糖値算出部32は、血糖値と周波数の変化とを相関付けた関係データに基づいて、演算部13の位相シフト回路30により変換され周波数カウンタ31により計測された周波数から生体の血糖値を算出する。【選択図】図1
