Surface acoustic wave (SAW) temperature sensor
A temperature sensor and surface acoustic wave technology, applied in thermometers, thermometers with physical/chemical changes, instruments, etc., can solve the problem of narrow frequency bandwidth of surface acoustic wave temperature sensors, small temperature measurement range of temperature sensors, and low utilization of spectrum resources. and other problems, to achieve the effect of increasing anti-interference ability, improving the utilization rate of spectrum resources, and increasing the temperature measurement range.
Inactive Publication Date: 2017-09-22
武汉泽塔电气科技有限公司
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Problems solved by technology
The present invention adopts address coding technology, and when multiple surface acoustic wave temperature sensors work in the same radiation range covered by the collector antenna, a different address is given to each surface acoustic wave temperature sensor, thereby effectively solving the same problem in the prior art. Within the radiation range, when multiple surface acoustic wave temperature sensors work at the same time, it is easy to cause sensor address conflicts and indistinguishable situations, and the frequency bandwidth occupied by a single surface acoustic wave temperature sensor is narrow, and the corresponding temperature sensor has a small temperature measurement range. Technical issues with low resource utilization
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[0018] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0019] according to figure 1 As shown, as an embodiment, the surface acoustic wave temperature sensor of the present invention includes a SAW temperature sensing part, the above-mentioned SAW temperature sensing part includes a SAW temperature sensing device arranged on the base, and the SAW temperature sensing device includes a piezoelectric substrate and a The IDT interdigital transducer and the reflective grating arranged on the piezoelectric substrate also include a SAW address coding part. The ...
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The invention provides a surface acoustic wave (SAW) temperature sensor. The SAW temperature sensor comprises an SAW temperature sensing part and an SAW address coding part. The SAW temperature sensing part comprises two or more SAW temperature sensing devices arranged on a base; each SAW temperature sensing device comprises a piezoelectric substrate, an interdigital transducer and reflecting grating bars, wherein the interdigital transducer and the reflecting grating bars are arranged on the piezoelectric substrate. The SAW address coding part comprises two or more SAW address labels arranged on the base; each SAW address label is of an SAW delay line structure with an interdigital transducer and address label reflecting grating bars separately arranged, wherein the address label reflecting grating bars are reflecting grating bars with codes. By adopting the address coding technology, the frequency bandwidth occupied by the single SAW temperature sensor is increased, the spectrum resource utilization rate is increased, the anti-jamming capability of the sensor is accordingly improved, and then the temperature measurement precision of the SAW temperature sensor is exponentially improved.
Description
technical field [0001] The invention relates to the technical field of surface acoustic wave devices, in particular to a surface acoustic wave temperature sensor. Background technique [0002] Devices based on surface acoustic wave technology are widely used in wireless communication systems because of their small size, low price, simple process, and excellent performance. In the surface acoustic wave sensor, the surface acoustic wave device is used as the energy conversion or sensing element, and the sensor senses the change of external factors such as temperature, pressure, atmosphere, chemical environment, acceleration, etc., and the transducer converts it into the change of the electrical signal. In order to achieve the purpose of monitoring. The biggest feature of various sensors made of surface acoustic wave devices is passive wireless, that is, the sensor does not need battery power, and the surface acoustic wave sensor has low production cost, high measurement accur...
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IPC IPC(8): G01K11/22
CPCG01K11/22
Inventor 胡品健
Owner 武汉泽塔电气科技有限公司