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A Surface Acoustic Wave Pressure Sensing Tag for Underground Pipelines

A technology of sensing tags and surface acoustic waves, which is applied to record carriers used in machines, instruments, computer components, etc., can solve problems such as poor anti-interference ability, short recognition distance, and environmental pollution of active pressure sensor batteries, achieving Strong anti-interference ability and long-distance effect

Active Publication Date: 2017-02-15
BEIJING INST OF RADIO METROLOGY & MEASUREMENT
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  • Abstract
  • Description
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Problems solved by technology

[0006] Aiming at the deficiencies in the prior art above, the purpose of the present invention is to provide a surface acoustic wave (Surface Acoustic Wave, SAW) pressure sensor tag for underground pipelines to solve the problem of short identification distance and poor anti-interference ability of traditional IC tags. and active pressure sensor batteries pollute the environment and other issues

Method used

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  • A Surface Acoustic Wave Pressure Sensing Tag for Underground Pipelines
  • A Surface Acoustic Wave Pressure Sensing Tag for Underground Pipelines
  • A Surface Acoustic Wave Pressure Sensing Tag for Underground Pipelines

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Embodiment Construction

[0022] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0023] figure 1 It is a schematic diagram of the structure of the surface acoustic wave pressure sensing tag. The surface acoustic wave pressure sensing tag consists of a piezoelectric substrate 1, an interdigital transducer 2, a pressure reflection grid 3, a pressure reflection grid 4, a logo reflection grid 5, and a tag antenna. 6 and the label shell 7 form. Among them, the distances from pressure reflection grating 3 and 4 to the center of IDT are equal, when no pressure is applied to the label, there is no time difference between the echo signals generated by 3 and 4; when pressure is applied to pressure reflection grating 3, the surface acoustic wave is The speed of propagation on the piezoelectric substrate below 3 will change, and there will be a time difference between the echo signals generated by 3 and 4. The time difference is related to the pressure it b...

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Abstract

The invention discloses an acoustic surface wave pressure sensing label for underground pipes. The sensing label comprises a label chip, a label antenna and a label outer shell arranged outside the label chip. The label chip comprises a piezoelectric substrate, an interdigital transducer deposited on the piezoelectric substrate and reflecting gratings. The piezoelectric substrate is formed by piezoelectric single crystals. The interdigital transducer is a double-way interdigital transducer. The acoustic surface wave pressure sensing label for the underground pipes has the advantages of being free of sources and lines, long in identification distance, high in antijamming capability and suitable for severe environments.

Description

technical field [0001] The invention relates to a pressure sensor label, in particular to a surface acoustic wave pressure sensor label for underground pipelines. Background technique [0002] At present, in the modernization construction of our country, with the continuous development of water, electric power, gas and other industries, especially communication lines, more and more pipelines are buried underground. However, with time changes and some human factors, the Some changes will be made to the underground pipelines and drawings indicated by the original above-ground signs, which will bring a lot of inconvenience to the maintenance personnel, especially in some important areas, such as traffic arteries, desert areas, etc., it is difficult to rely only on drawings and experience determine routing. At the same time, with the complexity and diversification of underground pipelines, as well as the irregular operation of engineering construction, accidents caused by accid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K19/077
Inventor 陈涛王凯让杨帆徐正山王旭
Owner BEIJING INST OF RADIO METROLOGY & MEASUREMENT
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