In view of shortcomings of traditional electric blood pressure meter that does not has functions of pressure verification and calibration

develop electric blood pressure meter with calibration function which can complete pressure verification and self-calibration by improving gas path structure of blood pressure meter. In experiment

the maximum error of static pressure is 2. 1 mm Hg

repeatability of systolic pressure is 3. 0 mm Hg

repeatability of diastolic pressure is 1. 716 mm Hg when blood pressure is 120 /80; repeatability of systolic pressure is 3. 8 mm Hg and repeatability of diastolic pressure is 1. 716 mm Hg when the blood pressure is 110 /75. In calibration experiment

the maximum error of static pressure after calibration is 0. 7 mm Hg

mean difference of systolic pressure and diastolic pressure are 1mm Hg and- 1 mm Hg

standard deviation of systolic pressure and diastolic pressure are 2 mm Hg and 1. 47 mm Hg. Results show that the prototype meets the requirements of JJG692—2010‘verification regulation of non-invasive blood pressure meter ’

the prototype after calibration can accurately measure static pressure and blood pressure

and the accuracy is improved.