Double grid type temperature sensitive sensor device and method for monitoring water area temperature

Abstract

The invention discloses a double-grid plate type temperature sensitive sensing device based on leakage waves. The device comprises a sound wave emitting device, a processor and a double-grid plate type one-dimensional plate-shaped sound sub-crystal, wherein the double-grid plate type one-dimensional plate-shaped sound sub-crystal comprises a substrate of which the transverse wave velocity and thelongitudinal wave velocity do not change with the temperature, a detection plate of which the transverse wave velocity and the longitudinal wave velocity changes with the temperature, sound grids located on the substrate and the detection plate, the sound wave emitting device is used for emitting excitation sound waves to the sound grid on the substrate, the processor is used for calculating acoustics parameters of sound emitted by the sound grid on the detection plate, and change of the water area temperature is monitored according to preset conditions and the resonance frequency corresponding to the acoustics parameters. The temperature sensitive sensing device is advantaged in that the temperature detection effect can be effectively improved. The invention further discloses a water areatemperature monitoring method, and detection efficiency of water area monitoring is improved.

Description

technical field [0001] The invention relates to the technical field of Lamb wave sensors, in particular to a leak wave-based double-grid type temperature-sensitive sensing device and a method for monitoring water temperature. Background technique [0002] One-dimensional plate-like phononic crystals are artificial composite materials composed of two or more elastic media with a certain thickness arranged periodically along one direction. And when the thickness of the thin plate is in the same order of magnitude as the wavelength of the ultrasonic waves excited by the thin plate, there is a special stress wave synthesized by longitudinal waves and transverse waves, which will propagate along the two parallel boundaries on the plate surface and reflect back and forth. Sound waves are called Lamb waves. When the propagation velocity of the wave in the plate is smaller than that of the wave in the matrix, the sound wave will be confined in the plate, which is called a non-leaki...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a double-grid type temperature-sensitive sensing device based on leakage waves, which has solved the problem of poor measurement effect of the temperature-sensitive sensing device in the prior art; method, improving the detection efficiency of water monitoring

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