CN113391092A - Structural acceleration detection device based on coupling patch antenna - Google Patents
Structural acceleration detection device based on coupling patch antenna Download PDFInfo
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- CN113391092A CN113391092A CN202110558819.XA CN202110558819A CN113391092A CN 113391092 A CN113391092 A CN 113391092A CN 202110558819 A CN202110558819 A CN 202110558819A CN 113391092 A CN113391092 A CN 113391092A
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- 238000001514 detection method Methods 0.000 title claims abstract description 23
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- 238000000034 method Methods 0.000 claims description 11
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 9
- 229910052737 gold Inorganic materials 0.000 claims description 9
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- 239000000463 material Substances 0.000 claims description 9
- 239000000284 extract Substances 0.000 abstract description 3
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 206010039203 Road traffic accident Diseases 0.000 description 1
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- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P15/00—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
- G01P15/02—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses
- G01P15/08—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses with conversion into electric or magnetic values
- G01P15/097—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses with conversion into electric or magnetic values by vibratory elements
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Abstract
The invention relates to a structural acceleration detection device based on a coupled patch antenna, which is characterized by being used for detecting the structural acceleration of a structure to be detected and comprising an acceleration sensor, a reader, a transmitting antenna and a data terminal, wherein the acceleration sensor comprises a base and a patch antenna, the patch antenna comprises a ground plane, a substrate, a chip and a radiation unit, the radiation unit comprises a radiation patch and a coupled patch, the substrate, the ground plane and the base are sequentially connected, the radiation patch and the chip are arranged on the substrate, the coupled patch is fixed on the base through a vibration sensitive beam, and a gap is arranged between the coupled patch and the radiation patch; during detection, the acceleration sensor is fixed on a structure to be detected, the reader receives and transmits signals through the transmitting antenna and extracts the resonant frequency of the patch antenna, and the data terminal calculates the structural acceleration of the structure to be detected according to the resonant frequency. Compared with the prior art, the invention has the advantages of simple layout, low cost, strong applicability, high reliability, long service life and the like.
Description
Technical Field
The invention relates to a structural acceleration detection technology, in particular to a structural acceleration detection device based on a coupled patch antenna.
Background
Acceleration information is widely used in scenes such as structure wind resistance and shock resistance calibration, aircraft safety performance evaluation, traffic accident alarm, high-voltage conductor galloping and the like. The acceleration sensor is generally needed to be used for collecting acceleration information, and traditional acceleration sensor, including vibrating wire sensor, capacitive sensor, optical fiber sensor etc. can detect the dynamic acceleration of carrying out of structure, but because traditional sensor adopts the cable to carry out data transmission and energy supply, in the testing environment of complicacy, often can produce very complicated wiring, needs higher human cost, and difficult getting rid of after the detecting system trouble and restoreing. By adding the power supply equipment to the acceleration sensor node, the acceleration sensor node can be accessed wirelessly. However, on one hand, these sensors are difficult to install and expensive, so that they are difficult to apply to a normalized and distributed acceleration sensing and monitoring system; on the other hand, the active acceleration sensor has a large failure probability in the rotation process due to large volume and more space, so that the active acceleration sensor is difficult to be applied to concrete embedded monitoring and acceleration monitoring of a rotating body, and the development of the active acceleration sensor is limited.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides the structural acceleration detection device based on the coupling patch antenna, which is simple in layout, low in cost, strong in applicability, high in reliability and long in service life.
The purpose of the invention can be realized by the following technical scheme:
a structural acceleration detection device based on a coupling patch antenna is used for detecting the structural acceleration of a structure to be detected and comprises an acceleration sensor, a reader, a transmitting antenna and a data terminal, wherein the acceleration sensor comprises a base and a patch antenna, the patch antenna comprises a ground plane, a substrate, a chip and a radiation unit, the radiation unit comprises a radiation patch and a coupling patch, the substrate, the ground plane and the base are sequentially connected, the radiation patch and the chip are arranged on the substrate, the coupling patch is fixed on the base through a vibration sensitive beam, and an interval is arranged between the coupling patch and the radiation patch;
during detection, the acceleration sensor is fixed on a structure to be detected, the reader receives and sends signals through the transmitting antenna and extracts the resonant frequency of the patch antenna, and the data acquisition terminal calculates the structural acceleration of the structure to be detected along the direction vertical to the vibration sensitive beam according to the resonant frequency;
the resonant frequency of the patch antenna is related to the dead distance between the coupling patch and the radiation patch, and because the vibration sensitive beam has elasticity, when the structure to be tested vibrates, the vibration sensitive beam vibrates, the coupling patch vibrates along with the vibration sensitive beam, and the distance between the coupling patch and the radiation patch changes at the moment, so that the resonant frequency of the patch antenna is changed, and at the moment, the structural acceleration of the structure to be tested along the direction vertical to the vibration sensitive beam can be represented by detecting and calculating the resonant frequency of the patch antenna;
the acceleration sensor is provided with a passive wireless sensor, energy input is carried out without a pre-installed battery or a feeder line, energy input is carried out by receiving electromagnetic waves of a transmitting antenna, data transmission is carried out without an extra feeder line, when a structure to be detected vibrates, the resonant frequency of the patch antenna changes, the change amount of the resonant frequency can be obtained through a reader, the relative dislocation condition of the short-circuit patch and the radiation patch is further calculated, and therefore vibration acceleration information of the structure is obtained in a passive wireless mode;
the chip is stored with the corresponding serial number and the position information of the acceleration sensor, and when the acceleration sensors are arranged, the information sources can be conveniently identified.
Further, the base comprises a bottom connecting plate and a lateral supporting plate vertically arranged on the bottom connecting plate.
Furthermore, the vibration sensitive beam is vertically arranged on the lateral supporting plate, and the coupling patch and the radiation patch are parallel when the vibration sensitive beam does not vibrate.
Further, the lateral support plate and the bottom connecting plate are bonded.
Further, the lateral support plate is bonded to the ground plane.
Furthermore, the ground plane is fixedly connected with the base.
Further, the ground plane is plated on the substrate through a gold immersion process.
Further, the coupling patch is plated on the vibration sensitive beam through a gold immersion process.
Further, the radiation patch is plated on the substrate through a gold immersion process.
Further, the material of the substrate is RT5880, RT5870 or FR4 high-frequency laminated board material.
Compared with the prior art, the invention has the following beneficial effects:
(1) the resonant frequency of the patch antenna of the invention is related to the opposite distance between the coupling patch and the radiation patch, when the structure to be measured starts to vibrate, the vibration sensitive beam vibrates along with the resonant effect, so that the relative position between the coupling patch and the radiation patch is changed, the opposite distance between the coupling patch and the radiation patch is changed, thereby changing the resonant frequency of the patch antenna, the reader receives and transmits electromagnetic wave signals through the transmitting antenna, extracts the resonant frequency of the patch antenna, the data terminal detects the drift of the resonant frequency, and calculates the structural acceleration of the structure to be measured along the direction vertical to the vibration sensitive beam according to the corresponding relation, the acceleration sensor provides energy and information transmission through electromagnetic waves, and does not need additional power supply, power wires and data transmission lines, thereby avoiding fussy wiring work, and having low manufacturing cost, manpower and material resources are saved;
(2) the invention takes the resonance frequency of the patch antenna as a parameter to measure the acceleration, is little influenced by factors such as distance, environmental noise and the like, and has strong applicability of the acceleration sensor;
(3) the acceleration sensor does not need to be arranged coaxially with the structure to be detected, is more flexible to arrange, is less prone to failure under natural disasters, is high in reliability and small in size, and can be designed and built together with the structure to be detected as prefabricated equipment to build a real-time monitoring network;
(4) the chip of the invention stores the corresponding serial number and the position information of the acceleration sensor, and when a plurality of acceleration sensors are arranged, the information source can be conveniently identified by a reader.
Drawings
FIG. 1 is a schematic structural diagram of an acceleration sensor;
fig. 2 is a schematic structural diagram of a patch antenna;
FIG. 3 is a schematic view of the mounting location of the coupling patch;
FIG. 4 is a schematic view of the installation position of the structural acceleration detecting device during detection;
the reference numbers in the figures illustrate:
1. the device comprises a ground plane, 2 parts of a substrate, 3 parts of a radiation patch, 4 parts of a chip, 5 parts of a vibration sensitive beam, 6 parts of a coupling patch, 7 parts of a lateral supporting plate, 8 parts of a bottom connecting plate, 9 parts of an acceleration sensor, 10 parts of a reader, 11 parts of a transmitting antenna, 12 parts of a data acquisition terminal and 13 parts of a structure to be tested.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
A structural acceleration detection device based on a coupling patch antenna is disclosed, and comprises an acceleration sensor 9, a reader 10, a transmitting antenna 11 and a data terminal 12, wherein the acceleration sensor 12 comprises a base and a patch antenna, the patch antenna comprises a ground plane 1, a substrate 2, a chip 4 and a radiation unit, the radiation unit comprises a radiation patch 3 and a coupling patch 6, the substrate 2, the ground plane 1 and the base are sequentially connected, the radiation patch 3 and the chip 4 are arranged on the substrate 2, the radiation patch 3 is plated on the substrate 2 through a gold immersion process, the coupling patch 6 is fixed on the base through a vibration sensitive beam 5, the coupling patch 6 is plated on the vibration sensitive beam 5 through the gold immersion process, and a gap is arranged between the coupling patch 6 and the radiation patch 3;
as shown in fig. 3, the base comprises a bottom connecting plate 8 and a lateral supporting plate 7 vertically arranged on the bottom connecting plate 8, the vibration sensitive beam 5 is vertically arranged on the lateral supporting plate 7, and the coupling patch 6 and the radiation patch 3 are parallel when the vibration sensitive beam 5 does not vibrate.
The lateral supporting plate 7 is bonded with the bottom connecting plate 8, the lateral supporting plate 7 is bonded with the ground plane 1, the ground plane 1 is bonded with the base, and the ground plane 1 is plated on the substrate 2 through a gold immersion process.
The radiating patches 3 have dimensions of 51mm by 41mm and the coupling patches 6 have dimensions of 51mm by 14 mm.
The material of the substrate 2 is RT5880, RT5870 or FR4 high frequency laminate material.
The patch antenna is in a sheet shape and has the characteristics of low section and high quality factor, wherein the ground plane 1, the radiation patch 3 and the coupling patch 6 are made of copper, the substrate 2 is made of industrial dielectric material, when the patch antenna works, the ground plane 1 and the radiation unit form a cavity with grooves on two sides, electromagnetic waves are fed into the patch antenna to form surface current and are transmitted in the cavity, the middle substrate 2 plays a role of supporting and fixing the ground plane 1 and the radiation unit on one hand, and plays a role of a dielectric medium on the other hand, because the electromagnetic waves can oscillate between the radiation unit and the ground plane 1, when the dielectric substrate 2 is made of the industrial dielectric material with lower loss, the transmission loss of the electromagnetic waves can be reduced, and the working efficiency of the patch antenna is increased.
The resonant frequency of the patch antenna is related to the distance between the coupling patch 6 and the radiation patch 3, because the vibration sensitive beam 5 has elasticity, when the structure to be tested vibrates, the vibration sensitive beam 5 vibrates, the coupling patch 6 can vibrate along with the vibration sensitive beam 5, and the facing distance between the coupling patch 6 and the radiation patch 3 changes at the moment, so that the resonant frequency of the patch antenna is changed, the coupling patch attached to the vibration sensitive beam can sense the deformation information of the vibration sensitive beam, the deformation information of the vibration sensitive beam and the resonant frequency of the patch antenna have a definite relationship in a fixed range, and the structural acceleration of the structure to be tested 13 along the direction vertical to the vibration sensitive beam 5 can be represented by detecting and calculating the resonant frequency of the patch antenna at the moment;
the reader 10 transmits modulated electromagnetic wave signals to the patch antenna at different frequencies through the transmitting antenna 11, when the power of the signals received by the patch antenna reaches a threshold value, the chip 4 can be activated, the minimum transmitting power of the reader 10 required for activating the chip 4 is related to the frequency of the signals transmitted by the reader 14, when the reader 14 transmits the signals at the resonant frequency of the patch antenna, the minimum transmitting power required for activating the chip 4 is the minimum, and the resonant frequency of the patch antenna can be determined by searching the transmitting frequency which enables the minimum transmitting power to reach the minimum.
During detection, the acceleration sensor 9 is fixed on the structure to be detected 13, the reader 14 receives and sends signals through the transmitting antenna, the resonant frequency of the patch antenna is extracted, and the data acquisition terminal 12 calculates and obtains the structural acceleration of the structure to be detected 13 along the direction perpendicular to the vibration sensitive beam 5 according to the drift of the resonant frequency.
The acceleration sensor 9 is provided with a passive wireless sensor, energy input is not required to be carried out through a pre-installed battery or a feeder line, energy input is carried out through electromagnetic waves of the receiving and transmitting antenna 11, data transmission is also not required to be carried out through an extra feeder line, when the structure to be measured vibrates, the resonant frequency of the patch antenna changes, the change amount of the resonant frequency can be obtained through a reader, the relative motion condition of the coupling patch 6 and the radiation patch 3 is further calculated, and therefore vibration acceleration information of the structure to be measured 13 in the direction perpendicular to the vibration sensitive beam 5 is obtained.
The chip 4 stores therein the corresponding numbers and position information of the acceleration sensors, and when a plurality of acceleration sensors 9 are arranged, the reader 10 marks the data of the respective acceleration sensors according to the numbers.
The resonant frequency of the acceleration sensor is related to the type of patch antenna, and the basic frequency of the patch antenna can be changed by optimizing the sizes of the radiation patch 3 and the coupling patch 6 and the material of the substrate 2.
The measuring range of the acceleration sensor is mainly related to the size and the material of the vibration sensitive beam 5, and the acceleration sensor with different measuring ranges can be obtained by optimizing the size and the material of the vibration sensitive beam 5.
The embodiment provides a structural acceleration detection device based on a coupled patch antenna, vibration is transmitted through a vibration sensitive beam 5 to change the facing distance between a coupled patch 6 and a radiation patch 3, so that the resonant frequency of the patch antenna is changed, a reader 14 performs high-frequency access on a chip 4 to obtain the resonant frequency of the patch antenna, so that dynamic deformation information of a structure 13 to be detected is obtained, acceleration information of the structure 13 to be detected in the direction perpendicular to the vibration sensitive beam 5 is obtained through calculation according to the dynamic deformation information, an acceleration sensor 12 provides energy and information transmission through electromagnetic waves, an extra power supply and a data transmission line are not needed, so that complicated wiring work is avoided, meanwhile, the acceleration sensor 12 does not need to be arranged coaxially with the structure 13 to be detected, the layout is more flexible, and the failure is less prone to occurring under natural disasters; meanwhile, the resonance frequency of the patch antenna is used as a parameter to measure the acceleration, the influence of factors such as distance and environmental noise is small, and the applicability of the acceleration sensor 12 is strong; the acceleration sensor 12 is low in cost, small in size and simple in structure, and can be designed and built together with the structure 13 to be detected as prefabricated equipment to build a real-time monitoring network.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (10)
1. A structural acceleration detection device based on a coupling patch antenna is characterized by being used for detecting the structural acceleration of a structure to be detected (13) and comprising an acceleration sensor (9), a reader (10), a transmitting antenna (11) and a data terminal (12), the acceleration sensor (12) comprises a base and a patch antenna, the patch antenna comprises a ground plane (1), a substrate (2), a chip (4) and a radiation unit, the radiation unit comprises a radiation patch (3) and a coupling patch (6), the substrate (2), the ground plane (1) and the base are sequentially connected, the radiation patch (3) and the chip (4) are arranged on the substrate (2), the coupling patch (6) is fixed on the base through the vibration sensitive beam (5), a space is arranged between the coupling patch (6) and the radiation patch (3);
during detection, the acceleration sensor (9) is fixed on the structure (13) to be detected, the reader (14) receives and transmits signals through the transmitting antenna (15) to extract the resonant frequency of the patch antenna, and the data terminal (16) calculates the structural acceleration of the structure (13) to be detected according to the resonant frequency.
2. A structural acceleration detection device based on coupled patch antenna according to claim 1 characterized by, that said base comprises a bottom connection plate (8) and a lateral support plate (7) vertically arranged on the bottom connection plate (8).
3. A structural acceleration detection device based on coupled patch antenna according to claim 2 characterized by that, the vibration sensitive beam (5) is vertically placed on the lateral support plate (7).
4. A structural acceleration detection device based on coupled patch antenna according to claim 2 characterized by that, the lateral support plate (7) and the bottom connection plate (8) are glued.
5. A structural acceleration detection device based on coupled patch antenna according to claim 2 characterized by that, the lateral support plate (7) is glued to the ground plane (1).
6. The structural acceleration detection device based on coupled patch antenna of claim 1, characterized in that, the ground plane (1) is fixedly connected with the base.
7. The structural acceleration detection device based on the coupled patch antenna of claim 1, wherein the ground plane (1) is plated on the substrate (2) by a gold immersion process.
8. The structural acceleration detection device based on coupled patch antenna of claim 1, characterized in that the coupled patch (6) is plated on the vibration sensitive beam (5) by immersion gold process.
9. The structural acceleration detection device based on coupled patch antenna of claim 1, characterized in that the radiation patch (3) is plated on the substrate (2) by a gold immersion process.
10. The structural acceleration detecting device based on the coupled patch antenna of claim 1, wherein the material of the substrate (2) is RT5880, RT5870 or FR4 high frequency laminated board material.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110558819.XA CN113391092A (en) | 2021-05-21 | 2021-05-21 | Structural acceleration detection device based on coupling patch antenna |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110558819.XA CN113391092A (en) | 2021-05-21 | 2021-05-21 | Structural acceleration detection device based on coupling patch antenna |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114814292A (en) * | 2022-02-28 | 2022-07-29 | 同济大学 | Acceleration sensor and sensing system based on variable thickness air gap patch antenna |
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