PROBLEM TO BE SOLVED: To provide a constantly attachable blood pressure measuring apparatus that achieves easy correction without using a cuff blood pressure measurement device when a subject is constantly measured under free actions.SOLUTION: The blood pressure measuring device includes: a blood flow sensor part 18 for detecting the flow of flood flow in a living body a blood speed sensor driving part 20 for driving the blood flow sensor part 18 a blood speed sensor signal calculation part 22 for controlling the blood speed sensor driving part 20 and the blood speed sensor part 18, and calculating the blood speed in the living body a blood vessel diameter sensor part 27 for detecting differences in a reflection arrival time of a blood wall of the living body a blood vessel diameter sensor driving part 28 for driving the blood vessel diameter sensor part 27 a blood vessel sensor signal calculation part 30 for controlling the blood vessel diameter sensor driving part 28 and the blood vessel diameter sensor 27, and calculates a blood vessel diameter in the living body and a blood pressure signal calculation part 32 for calculating a blood pressure of the person to be measured using calculation results of the blood speed sensor signal calculation part 22 and the blood vessel diameter sensor signal calculation part 30.COPYRIGHT: (C)2012,JPO&INPIT【課題】被測定者が自由行動下で常時血圧測定する場合に、カフ型血圧計を使わず簡易に校正ができる常時装着可能な血圧測定装置を提供する。【解決手段】血圧測定装置は、生体内部の血液の流れを検出する血流速度センサー部18と、血流速度センサー部18を駆動させる血流速度センサー駆動部20と、血流速度センサー駆動部20と血流速度センサー部18とを制御し生体内部の血流速度を求める血流速度センサー信号演算部22と、生体内部の血管壁の反射到達時間差を検出する血管径センサー部27と、血管径センサー部27を駆動させる血管径センサー駆動部28と、血管径センサー駆動部28と血管径センサー部27とを制御し生体内部の血管径を求める血管径センサー信号演算部30と、血流速度センサー信号演算部22と血管径センサー信号演算部30との演算結果を用いて被測定者の血圧を求める血圧信号演算部32と、を有する。【選択図】図3
