Abstract
The present method of calibration of pressure transducer using weight is still not sufficient to take accurate and absolute clothing pressure values, particularly in light pressure range. Using a new method of calibration with air pressure, we measured and analyzed the relationship between applied pressure and response pressure.
We also investigated the performance of the pressure transducer of new type, Kulite LQL-125-25, which was 0.647 gm in weight, 0.076 mm in thickness and 0.215 cm in diameter, on the human upper arm and on the rigid model of similar size, and compared it with the results of the baloon and disc type pressure transducers.
Results were as follows :
1) The relationship between applied pressure and response pressure was almost linear and repeatable by means of calibration with air pressure. The accuracy better than 0.1% was obtained.
2) Kulite LQL-125-25 type pressure transducer showed higher adaptability to human bodies, greater sensitivity, more accuracy, repeatability and stability to temperature than the baloon type and the disc type ones.
3) The response pressure of Kulite type showed much higher value on the rigid model, while almost same value with applied pressure on the human body. And in case of placing a piece of felted cloth between the rigid model and transducer, it was decreased near to the value on the human body.
