| 摘要 |
PURPOSE:To measure hourly variations of the air current accurately, by providing a cylindrical body adapted to pass air current by breathing of an object to be inspected to be equipped with an air current velocity detection means which converts pressure generated by the air current into an electrical signal for measurement. CONSTITUTION:For example, a plastic cylindrical body 17 with the thickness t=2mm., the length l=13mm. and the outer diameter d=12mm. or so is equipped thereinside with an air current velocity detection means 18 which converts pressure generated by air current passing therethrough into an electrical signal to form a sensor 8 for measuring the air current velocity. Then, one end of the sensor 8 is inserted into an object to be inspected, such as nostrils to measure changes in the air current caused by breathing of the object being inspected. This enables accurate measurement of hourly variation of air current with a small, light and inexpensive equipment. |
