Sound surface wave 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 high temperature of reaction products, reduce device volume, suppress low-end parasitic responses, and suppress high-end lateral Modular response effect

Inactive Publication Date: 2012-05-02
BEIJING ZHONGXUN SIFANG SCI & TECH
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  • Abstract
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Problems solved by technology

[0004] The purpose of the present invention is to convert n-butene into isobutene through a fixed bed catalytic isomerization method, and at the same time adopt a welded plate heat exchanger and adopt deep heat exchange technology to solve the problem of high temperature of the reaction product, and then provide a n-butene Catalytic isomerization method of olefin fixed bed

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Embodiment Construction

[0009] The specific embodiment of the present invention provides a surface acoustic wave temperature sensor, such as figure 1 As shown, it includes a circuit board 1 and a substrate 2, an antenna device 1-1 for signal reception and transmission is arranged on the circuit board 1, and a resonant cavity for providing a resonant signal and two A reflective grid for absorbing reflected signals.

[0010] Specifically, compared with a general resonator, the resonant cavity fingers of the substrate provided in this specific embodiment adopt a cosine function weighting design, which suppresses the high-end transverse mode response and ensures the high amplitude value of the output signal to the greatest extent. It makes it possible to realize the long-distance transmission of signals. In the design of the reflective grid, it breaks through the conventional arrangement of fingers and adopts the dot-matrix weighted reflective grid array method to suppress the low-end spurious response,...

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Abstract

The invention provides a sound surface wave temperature sensor, which comprises a circuit board and a substrate, wherein the circuit board is provided with an antenna device for receiving and transmitting a signal; and the substrate is provided with a resonant cavity for providing a resonant signal and two reflection grids for absorbing reflection signals. According to the sound surface wave temperature sensor, the resonant signal is provided by the resonant cavity on the substrate to inhibit high-end transverse mode response and the reflection signals are absorbed by the reflection girds to inhibit low-end spurious response; and the corresponding sound surface wave temperature sensor is only composed of two parts, i.e., the circuit board and the substrate, so that the volume of the sound surface wave temperature sensor is reduced and the sound surface wave temperature sensor can be miniaturized in use.

Description

technical field [0001] The invention provides a temperature early warning type surface acoustic wave temperature sensor applied to a smart grid, belonging to the technical field of temperature measurement. Background technique [0002] Today, with the rapid development of sensor technology, for many special occasions of sensor applications, the connection between the sensor and the unit under test is usually impossible to achieve. For example, when using in-line sensors to measure parameters of slip ring brushes, motor rotors, and many moving objects, there will be many mechanical and circuit problems, interruptions, noise, or even no measurement at all. For another example, the measurement of the acceleration inside the car when the car collides, the measurement of the internal pressure, temperature and friction of the car tires, etc., cannot be connected. Therefore, for these special occasions, wireless sensors must be used to achieve measurement. [0003] Wireless senso...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K11/22
Inventor 张敬钧
Owner BEIJING ZHONGXUN SIFANG SCI & TECH
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