| 摘要 |
PURPOSE:To provide an elastic surface wave device in which the transmitting time of an elastic surface wave varies with changing temp. or humidity of the space at the part contacting the surface or concentration of specific substance existing in the space. CONSTITUTION:When an electric signal is fed to and taken out of electrodes 2, 3 in the form of rattan bamboo blind, an elastic surface wave is energized in the direction from the electrode 2 to the one 3. The velocity of this surface wave is related to the temp. or humidity of the space in the part contacting an organic thin film 4 or the concentration of a specific substance existing in the space. Accordingly the temp., humidity, or concentration can be calculated from the transmitting time of the wave. High sensitivity required of this sort of device can further be enhanced by furnishing organic thin film 4 on the transmission path, which allows it to be used for constituting a sensor of a delay line oscillator, etc. |
