| 摘要 |
It is disclosed a device based on active element(s) (1, 25) that can both monitor/measure and control the temperature of a given environment. Such element(s) are characterized by a low thermal capacity and are supplied power by means of a pulse width modulating technique. Monitoring is performed - on the same element(s) - by means of analysis of the temperature relaxation between heating pulses. The element(s) can be controlled to body temperature, thus resulting in a low-power, high-precision, pocket-size and light-weight instrument (pneumotacograph) suitable to perform accurate spirometry measurements. The device can be easily adapted for applications in high precision flow rate measurements and high sensitivity calorimetry as well.
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