CN108267510A - Wooden component health monitoring systems and method - Google Patents
Wooden component health monitoring systems and method Download PDFInfo
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- CN108267510A CN108267510A CN201810133502.XA CN201810133502A CN108267510A CN 108267510 A CN108267510 A CN 108267510A CN 201810133502 A CN201810133502 A CN 201810133502A CN 108267510 A CN108267510 A CN 108267510A
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- 230000036541 health Effects 0.000 title claims abstract description 60
- 238000012544 monitoring process Methods 0.000 title claims abstract description 58
- 238000000034 method Methods 0.000 title claims abstract description 37
- 238000007906 compression Methods 0.000 claims abstract description 28
- 230000006835 compression Effects 0.000 claims abstract description 28
- 239000002023 wood Substances 0.000 claims abstract description 25
- 238000001514 detection method Methods 0.000 claims abstract description 15
- 238000000605 extraction Methods 0.000 claims abstract description 13
- 238000012545 processing Methods 0.000 claims abstract description 11
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 10
- 230000000153 supplemental effect Effects 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 abstract description 10
- 230000003862 health status Effects 0.000 abstract description 9
- 238000009434 installation Methods 0.000 abstract description 8
- 238000012423 maintenance Methods 0.000 abstract description 7
- 238000007726 management method Methods 0.000 description 12
- 230000008569 process Effects 0.000 description 10
- 238000004891 communication Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 7
- 230000008901 benefit Effects 0.000 description 6
- 230000006870 function Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- QVFWZNCVPCJQOP-UHFFFAOYSA-N chloralodol Chemical compound CC(O)(C)CC(C)OC(O)C(Cl)(Cl)Cl QVFWZNCVPCJQOP-UHFFFAOYSA-N 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000003796 beauty Effects 0.000 description 1
- 230000006399 behavior Effects 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 238000013144 data compression Methods 0.000 description 1
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- 238000011161 development Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000036039 immunity Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- GQYHUHYESMUTHG-UHFFFAOYSA-N lithium niobate Chemical compound [Li+].[O-][Nb](=O)=O GQYHUHYESMUTHG-UHFFFAOYSA-N 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000004377 microelectronic Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- 229910052573 porcelain Inorganic materials 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/14—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object using acoustic emission techniques
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/023—Solids
- G01N2291/0238—Wood
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/028—Material parameters
- G01N2291/0289—Internal structure, e.g. defects, grain size, texture
Abstract
The present invention provides a kind of wooden component health monitoring systems and method, is related to wooden component monitoring technical field, system includes multiple wireless acoustic emission sensor nodes and control terminal, node include：Acoustic emission sensor, the first microcontroller；The acoustic emission signal of the wooden component of acoustic emission sensor acquisition；First microcontroller carries out parameter extraction according to acoustic emission signal, obtains characteristics of Acoustic Emission parameter, and after passing through Differential Compression algorithm to characteristics of Acoustic Emission parameter processing, control terminal is sent to, to obtain the health detection result of wooden component.The present invention is based on multiple monitoring nodes of wireless acoustic emission sensor network, in real time, the health status of monitor wood component, overcome the problem of monitoring system cost of installation and maintenance is high, autgmentability is poor in the prior art, pass through Differential Compression algorithm, effectively reduce the power consumption of wireless acoustic emission sensor node, extend lithium battery service life, reduce data transmission period, and alleviate the data pressure of control terminal.
Description
Technical field
The present invention relates to wooden component monitoring technical field, more particularly, to a kind of wooden component health monitoring systems and method.
Background technology
Structural health monitoring technology is widely used to the civil engineerings such as bridge, dam, large complicated building structure at present
Field.For the ancient building that China and worldwide widespread need are protected and repaired, the application of the technology
To have immeasurable Cultural Significance and economic value with promoting.
Typically, the composition of ancient building structural healthy monitoring system and structural healthy monitoring system base in general sense
This is consistent, but has the characteristics that its own again simultaneously：First, the laying of monitoring system disturbs structural body small, that is, monitors system
Installation and using cannot to ancient architecture building structure in itself safety formed hidden danger.2nd, the laying of monitoring system does not influence ancient building
Beauty, i.e., be monitored system design when, to consider the reasonable Arrangement mode of equipment, circuit etc., other can also be used not
The decorative means of building structure are influenced, make monitoring device hidden as possible.3rd, institute's measured data is highly reliable, that is, monitors the resistance to of system
Long property, reliability and strong interference immunity, can work, measurement accuracy meets needs always in rugged environment condition.4th, conveniently
It constructs and is readily disassembled and replaces, monitor the installation of system with implementing that there is operability, any technology applied to ancient building
Behavior is both needed to invertibity.
With the development of wireless communication technique and micro-electronic mechanical skill in recent years, the structure based on wireless sensor network
Health monitoring has obtained extensive concern.However in the existing monitoring system based on wireless sensor network, use is all
The sensor essentially identical with conventional structure health monitoring systems and system structure, for wooden structure ancient architecture the characteristics of it is special
It improves, and most widely used fiber-optic grating sensor, although having the advantages that reliable and stable, deficiency is also apparent from：
A large amount of conducting wire is needed to connect, cost is relatively high；It is more fragile, once conducting wire destruction will cause sensor to exit work；Peace
Fill heavy workload, maintenance cost height etc..
Invention content
In view of this, the purpose of the present invention is to provide a kind of wooden component health monitoring systems and method, based on wireless sound
Multiple monitoring nodes of emission sensor network, real-time, monitor wood component health status, and overcome existing skill
The problem of system cost of installation and maintenance is high, autgmentability is poor is monitored in art, in addition, by Differential Compression algorithm, can effectively be dropped
The power consumption of the low wireless acoustic emission sensor node extends lithium battery service life, reduces data transmission period, and alleviate
The data pressure of the control terminal.
In a first aspect, an embodiment of the present invention provides a kind of wooden component health monitoring systems, including：Timber structure is deployed in build
Build multiple wireless acoustic emission sensor nodes and the control terminal on wooden component；
Wireless acoustic emission sensor node includes：Acoustic emission sensor, the first microcontroller；
The acoustic emission signal of the wooden component of acoustic emission sensor acquisition, and acoustic emission signal is sent to the first microcontroller；
First microcontroller carries out parameter extraction according to acoustic emission signal, obtains characteristics of Acoustic Emission parameter, and pass through difference
After compression algorithm is to characteristics of Acoustic Emission parameter processing, it is sent to control terminal；
Control terminal obtains the health detection result of wooden component according to treated characteristics of Acoustic Emission parameter.
With reference to first aspect, an embodiment of the present invention provides the first possible embodiment of first aspect, wherein, nothing
Line acoustic emission sensor node further includes：Data acquisition module；
Data acquisition module is connect respectively with acoustic emission sensor and the first microcontroller；
Data acquisition module, the acoustic emission signal of wooden component detected to acoustic emission sensor carry out high speed acquisition, will
Signal after acquisition is sent to the first microcontroller.
With reference to first aspect, an embodiment of the present invention provides second of possible embodiment of first aspect, wherein, nothing
Line acoustic emission sensor node further includes：Preamplifier, wave filter；
Preamplifier is connect respectively with acoustic emission sensor and wave filter；
Wave filter is connect with data acquisition module；
The acoustic emission signal that preamplifier acquires acoustic emission sensor is amplified, and amplified signal is sent
To wave filter；
Wave filter is filtered amplified signal, and filtered signal is sent to data acquisition module.
With reference to first aspect, an embodiment of the present invention provides the third possible embodiment of first aspect, wherein, nothing
Line acoustic emission sensor node further includes：First power management module, the first wireless transport module；
First power management module, the first wireless transport module are connect respectively with the first microcontroller；
First power management module, for detecting the first supply voltage value of acoustic emission sensor, and the first power supply is electric
Pressure value sends out institute to the first microcontroller；
First supply voltage value is sent to control terminal by the first microcontroller by the first wireless transport module.
With reference to first aspect, an embodiment of the present invention provides the 4th kind of possible embodiment of first aspect, wherein, nothing
Line acoustic emission sensor node further includes：First data memory module；
First data memory module is connect with the first microcontroller；
First data memory module stores the data transmitted by the first microcontroller；Data include：Sound emission is believed
Number, characteristics of Acoustic Emission supplemental characteristic.
With reference to first aspect, an embodiment of the present invention provides the 5th kind of possible embodiment of first aspect, wherein, control
Terminal processed includes：Second microcontroller, warning device；
Second microcontroller is connect respectively with the first microcontroller, warning device；
Characteristics of Acoustic Emission parameter of second microcontroller transmitted by for the first microcontroller of reception, and to characteristics of Acoustic Emission
Parameter is analyzed, and obtains the health detection result of wooden component；
Second microcontroller is additionally operable to receive the first supply voltage value transmitted by the first microcontroller, judges the first power supply
When voltage value is more than the first predetermined voltage threshold, control warning device is alarmed.
With reference to first aspect, an embodiment of the present invention provides a kind of the 6th possible embodiment of first aspect, wherein,
Control terminal further includes：Second source management module,
Second source management module is connect with the second microcontroller；
Second source management module detects the second source voltage value of control terminal, and in second source voltage value less than the
During two predetermined voltage thresholds, automatically switch lithium battery and be powered.
With reference to first aspect, an embodiment of the present invention provides the 7th kind of possible embodiment of first aspect, wherein, control
Terminal processed further includes：Second wireless transport module, the second data memory module；
Second wireless transport module, the second data memory module are connect respectively with the second microcontroller；
Second microcontroller receives the data transmitted by the first microcontroller by the second wireless transport module；
Second data memory module, for being stored to the data transmitted by the second microcontroller.
Second aspect, the embodiment of the present invention provide a kind of wooden component health monitor method, and this method is applied to by being deployed in
In the system that multiple wireless acoustic emission sensor nodes and control terminal on timber buildings wood component form, wireless sound emission
Sensor node includes：Acoustic emission sensor, microcontroller；Method includes：
The acoustic emission signal of the wooden component of acoustic emission sensor acquisition, and acoustic emission signal is sent to microcontroller；
Microcontroller carries out parameter extraction according to acoustic emission signal, obtains characteristics of Acoustic Emission parameter, and pass through Differential Compression
After algorithm is to characteristics of Acoustic Emission parameter processing, it is sent to control terminal；
Control terminal obtains the health detection result of wooden component according to treated characteristics of Acoustic Emission parameter.
With reference to second aspect, an embodiment of the present invention provides the first possible embodiment of second aspect, wherein, it is poor
Compression algorithm is divided, is used for transmission the difference of characteristic parameter, and banner word is added in the data packet of compression.
The embodiment of the present invention brings following advantageous effect：
Wood component health monitoring systems provided in an embodiment of the present invention are more on timber buildings wood component including being deployed in
A wireless acoustic emission sensor node and control terminal, wherein, wireless acoustic emission sensor node includes：Acoustic emission sensor,
First microcontroller；The acoustic emission signal of the wooden component of acoustic emission sensor acquisition, and acoustic emission signal is sent to the first micro-control
Device processed；First microcontroller carries out parameter extraction according to acoustic emission signal, obtains characteristics of Acoustic Emission parameter, and pass through Differential Compression
After algorithm is to characteristics of Acoustic Emission parameter processing, it is sent to control terminal；Control terminal according to treated characteristics of Acoustic Emission parameter,
Obtain the health detection result of wooden component.The wooden component health monitoring systems that the embodiment of the present invention is provided are sent out based on wireless sound
Multiple monitoring nodes of sensor network are penetrated, real-time, monitor wood component health status, and overcome the prior art
The problem of middle monitoring system cost of installation and maintenance is high, autgmentability is poor, in addition, by Differential Compression algorithm, can effectively reduce
The power consumption of the wireless acoustic emission sensor node extends lithium battery service life, reduces data transmission period, and alleviate
The data pressure of the control terminal.
Other features and advantages of the present invention will illustrate in the following description, also, partly become from specification
It obtains it is clear that being understood by implementing the present invention.The purpose of the present invention and other advantages are in specification, claims
And specifically noted structure is realized and is obtained in attached drawing.
For the above objects, features and advantages of the present invention is enable to be clearer and more comprehensible, preferred embodiment cited below particularly, and coordinate
Appended attached drawing, is described in detail below.
Description of the drawings
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution of the prior art
Embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, in being described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is the structure diagram of a kind of wooden component health monitoring systems that the embodiment of the present invention one provides；
Fig. 2 is the schematic diagram in kind of a kind of wooden component health monitoring systems that the embodiment of the present invention one provides；
Fig. 3 is wireless acoustic emission sensor section in a kind of skid component health monitoring systems that the embodiment of the present invention one provides
The structure diagram of point；
Fig. 4 is the structural representation of control terminal in a kind of wooden component health monitoring systems that the embodiment of the present invention one provides
Figure；
Fig. 5 is a kind of flow chart of wooden component health monitor method provided by Embodiment 2 of the present invention；
Fig. 6 is original data packet format figure in a kind of wooden component health monitor method provided by Embodiment 2 of the present invention；
Fig. 7 in a kind of wooden component health monitor method provided by Embodiment 2 of the present invention after Differential Compression algorithm process
Data packet format figure；
Fig. 8 in a kind of wooden component health monitor method provided by Embodiment 2 of the present invention after Differential Compression algorithm process
Another data packet format figure.
Specific embodiment
Purpose, technical scheme and advantage to make the embodiment of the present invention are clearer, below in conjunction with attached drawing to the present invention
Technical solution be clearly and completely described, it is clear that described embodiment be part of the embodiment of the present invention rather than
Whole embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise
Lower all other embodiments obtained, shall fall within the protection scope of the present invention.
At present, the existing monitoring system based on wireless sensor network, generally use fiber-optic grating sensor are supervised
It surveys, although having the advantages that reliable and stable, deficiency is also apparent from：A large amount of conducting wire is needed to connect, cost is relatively high；Compared with
For fragility, sensor will be caused to exit work once conducting wire destroys；Installation workload is big, maintenance cost height etc..
Based on this, an embodiment of the present invention provides a kind of wooden component health monitoring systems and method, based on wireless sound emission
Multiple monitoring nodes of sensor network, real-time, monitor wood component health status, and overcome in the prior art
The problem of monitoring system cost of installation and maintenance is high, autgmentability is poor, in addition, by Differential Compression algorithm, can effectively reduce institute
The power consumption of wireless acoustic emission sensor node is stated, extends lithium battery service life, reduces data transmission period, and alleviate institute
State the data pressure of control terminal.
For ease of understanding the present embodiment, first to a kind of wooden component health monitoring disclosed in the embodiment of the present invention
System describes in detail.
Embodiment one：
An embodiment of the present invention provides a kind of wooden component health monitoring systems, and shown in Figure 1, which includes：Deployment
In multiple wireless acoustic emission sensor nodes 11 and control terminal 12 on timber buildings wood component.
Wherein, wireless acoustic emission sensor node 11 includes：Acoustic emission sensor 111, the first microcontroller 112；Sound is sent out
The acoustic emission signal that sensor 111 acquires wooden component is penetrated, and acoustic emission signal is sent to the first microcontroller 112；First is micro-
Controller 112 carries out parameter extraction according to acoustic emission signal, obtains characteristics of Acoustic Emission parameter, and pass through Differential Compression algorithm to sound
After emitting characteristic parameter processing, it is sent to control terminal 12；Control terminal 12 is obtained according to treated characteristics of Acoustic Emission parameter
The health detection result of wooden component.
The wooden member upper of the building of each timber structure affixes one's name to multiple wireless acoustic emission sensor nodes 11, referring to Fig. 2 institutes
Show, multiple wireless acoustic emission sensor nodes 11 (being represented in Fig. 2 with 2) are wireless with control terminal 12 (being represented in Fig. 2 with 1) respectively
Connection.Specifically, acoustic emission signal is acquired by the acoustic emission sensor 111 in the node in real time, then by the node
The first microcontroller 112 characteristic parameter extraction is carried out to acoustic emission signal, and before the deadline to control terminal 12
Send extracted supplemental characteristic.In the present embodiment, wireless acoustic emission sensor 111 uses lithium battery power supply, continual to adopt
The acoustic emission signal of the wooden component of collection；Control terminal 12, the first microcontroller 112 in wireless acoustic emission sensor node 11
The parameter information of transmitted acoustic emission signal judges the health status of above-mentioned wooden component.
The wooden component health monitoring systems that the embodiment of the present invention is provided, based on the multiple of wireless acoustic emission sensor network
Monitoring node, real-time, monitor wood component health status, and overcome the installation of monitoring system and dimension in the prior art
The problem of of high cost, autgmentability is poor is protected, in addition, by Differential Compression algorithm, can effectively reduce the wireless voice sending sensor
The power consumption of device node extends lithium battery service life, reduces data transmission period, and alleviate the data of the control terminal
Pressure.
Wooden component health monitoring systems based on wireless acoustic emission sensor node 11 in the present embodiment have following excellent
Point：First, dynamic detects required energy and carrys out self-structure in itself, is not required to external energy；2nd, it is more sensitive to fault of construction, it can
These defects are detected in the activity condition outside plus under structural stress；3rd, can obtain fault of construction with load, time and temperature etc. because
The real time information of element variation.
Acoustic emission sensor 111 is the pith of wooden component health monitoring systems, is the weight for influencing device overall performance
Want factor.In wooden component health monitoring, the sound emission of resonant mode acoustic emission sensor 111 and broadband response is used mostly
Sensor 111.
The main Types of acoustic emission sensor 111 have：Highly sensitive acoustic emission sensor is using a kind of most resonance
Formula acoustic emission sensor；Broadband acoustic emission sensor usually the piezoelectric element of multiple and different thickness is made of or uses recessed ball
Face shape achievees the purpose that widening frequency band with wedge-shaped piezoelectric element；High temperature acoustic emission sensor is usually made pottery by lithium niobate or lead titanates
Porcelain is made；Differential acoustic emission sensor is made of the piezoelectric element of two positive and negative anodes differentials, exports corresponding differential letter
Number, signal increases due to superposition；In addition, also miniature acoustic emission sensor, magnetic suck acoustic emission sensor, low frequency inhibition sound are sent out
Penetrate sensor and condenser type acoustic emission sensor etc..
For acoustic emission source positioning, during practical wood component health monitoring, the metal of stable structure can be usually encountered
Material, the sound of this kind of material is smaller to anisotropy, acoustic attenuation coefficient also very little, frequency range be mostly 25KHz~
10MHz, therefore resonant mode acoustic emission sensor is selected relatively to be suitble to.
It should be noted that for the concrete condition of the different monitoring nodes in target construction, can select different
Targetedly acoustic emission sensor 111 carry out data acquisition, can improve wooden component health condition accuracy in detection and
Efficiency, in the present embodiment, the 111 model SN510 of acoustic emission sensor of more use.
In a preferred embodiment, above-mentioned wireless acoustic emission sensor node 11 further includes：Data acquisition module
115th, preamplifier 113, wave filter 114, it is shown in Figure 3.
Specifically, preamplifier 113 is connect respectively with acoustic emission sensor 111 and wave filter 114；Wave filter 114 with
Data acquisition module 115 connects；Data acquisition module 115 is connect respectively with the first microcontroller 112；Preamplifier 113 is right
The acoustic emission signal that acoustic emission sensor 111 is acquired is amplified, and amplified signal is sent to wave filter 114；Filtering
Device 114 is filtered amplified signal, and filtered signal is sent to data acquisition module 115；Data acquisition module
115, high speed acquisition is carried out to filtered signal, the signal after acquisition is sent to the first microcontroller 112, then first is micro-
Controller 112 carries out the extraction of signal parameter feature again, and the characteristic parameter of extraction is sent to control terminal, so that control is eventually
End carries out judgement, display and the alarm of wooden component health status.
In the present embodiment, data acquisition module 115 uses high-speed a/d data acquisition module, i.e. chip AD7356, first is micro-
Controller 112 uses ARM chips.After the wireless acoustic emission sensor node 11 of wooden component starts, the wooden component of detection in real time
Acoustic emission signal can realize the high speed acquisition to acoustic emission signal using high-speed a/d data acquisition module, greatly improve wooden structure
The monitoring efficiency of part health status.
In another preferred embodiment, wireless acoustic emission sensor node 11 further includes：First power management module
116th, the first wireless transport module 118, the first data memory module 117, as shown in Figure 3.
First power management module 116, the first wireless transport module 118, the first data memory module 117 are respectively with first
Microcontroller 112 connects；First power management module 116, for detecting the first supply voltage value of acoustic emission sensor 111,
And the first supply voltage value is sent out into institute to the first microcontroller 112；First microcontroller 112 passes through the first wireless transport module
118, the first supply voltage value is sent to control terminal, so that control terminal judges first according to first supply voltage value
Whether supply voltage value is more than the first predetermined voltage threshold, if it is, alarming.First data memory module 117 is to
Data transmitted by one microcontroller 112 are stored；Data include：Acoustic emission signal data, characteristics of Acoustic Emission supplemental characteristic.
Above-mentioned first wireless transport module 118 includes but not limited to the communication modules such as wireless Zigbee, LoRa, NB-IOT.
In embodiments of the present invention, control terminal specifically includes：Second microcontroller 121, warning device.Second microcontroller
Device 121 is connect respectively with the first microcontroller 112, warning device；Second microcontroller 121 is for the first microcontroller of reception
Characteristics of Acoustic Emission parameter transmitted by 112, and characteristics of Acoustic Emission parameter is analyzed, obtain the health detection knot of wooden component
Fruit；Second microcontroller 121 is additionally operable to receive the first supply voltage value transmitted by the first microcontroller 112, judges the first electricity
When source voltage value is more than the first predetermined voltage threshold, control warning device is alarmed.
Above-mentioned second microcontroller 121 uses ARM chips.In another preferred embodiment, control terminal further includes：
Second source management module 122, the second wireless transport module 124, the second data memory module 123 and communication interface 125 are such as schemed
Shown in 4.
Wherein, second source management module 122, the second wireless transport module 124, the second data memory module 123 are distinguished
And communication interface 125 is connect respectively with the second microcontroller 121.Second source management module 122 detects the of control terminal
Two supply voltage values, and when second source voltage value is less than the second predetermined voltage threshold, automatically switches lithium battery and be powered.
Second microcontroller 121 receives the data transmitted by the first microcontroller 112 by the second wireless transport module 124；Second number
According to memory module 123, for being stored to the data transmitted by the second microcontroller 121.
Above-mentioned communication interface 125 includes：USB interface and/or RS232 interface.Above-mentioned second wireless transport module 124 includes
But the communication modules such as wireless Zigbee, LoRa, NB-IOT are not limited to, such as：Chip SX1278.
Included the following steps using the method that above-mentioned wooden component health monitoring systems carry out wooden component health detection：
(1) start each wireless acoustic emission sensor node 11 in wooden component health monitoring systems, carry out data acquisition,
The acoustic emission signal of wooden component is acquired by acoustic emission sensor 111；
(2) by the first microcontroller 112 in wireless acoustic emission sensor node 11, acoustic emission signal is diagnosed
Algorithm process；
(3) first microcontrollers 112 are judged according to above-mentioned algorithm process result, if algorithm process result is normal
In the range of, show that wooden component is lossless or micro- damage, further extract the feature and compressive features data of data, and by compression
Characteristic is sent to control terminal；
(4) if algorithm process result is not in normal range (NR), the first microcontroller 112 can be straight by the initial data of acquisition
It receives and sends to control terminal；
(5) control terminal carries out the data that the first microcontroller 112 in wireless acoustic emission sensor node 11 is sent
Final processing.
Wood component health monitoring systems provided in an embodiment of the present invention are more on timber buildings wood component including being deployed in
A wireless acoustic emission sensor node 11 and control terminal, wherein, wireless acoustic emission sensor node 11 includes：Voice sending sensor
Device 111, the first microcontroller 112；Acoustic emission sensor 111 acquires the acoustic emission signal of wooden component, and acoustic emission signal is sent out
It send to the first microcontroller 112；First microcontroller 112 carries out parameter extraction according to acoustic emission signal, obtains characteristics of Acoustic Emission
Parameter, and characteristics of Acoustic Emission parameter is sent to control terminal；Control terminal obtains wooden component according to characteristics of Acoustic Emission parameter
Health detection result.The wooden component health monitoring systems that the embodiment of the present invention is provided, based on wireless acoustic emission sensor network
Multiple monitoring nodes, in real time, the health status of monitor wood component, and overcome monitoring system peace in the prior art
The problem of dress and maintenance cost are high, autgmentability is poor.
Embodiment two：
The embodiment of the present invention provides a kind of wooden component health monitor method, and this method is applied to by being deployed in timber buildings
In the system that multiple wireless acoustic emission sensor nodes and control terminal on wooden component form, wireless acoustic emission sensor node
Including：Acoustic emission sensor, microcontroller.As shown in figure 5, the wooden component health monitor method packet that the embodiment of the present invention is provided
It includes：
S101：The acoustic emission signal of the wooden component of acoustic emission sensor acquisition, and acoustic emission signal is sent to microcontroller；
S102：Microcontroller carries out parameter extraction according to acoustic emission signal, obtains characteristics of Acoustic Emission parameter, and pass through difference
After compression algorithm is to characteristics of Acoustic Emission parameter processing, it is sent to control terminal；
S103：Control terminal obtains the health detection result of wooden component according to treated characteristics of Acoustic Emission parameter.
The wooden component health monitor method that the embodiment of the present invention is provided, the wooden component health monitoring described in embodiment one
System has identical technical characteristic, can equally realize above-mentioned function, details are not described herein.
In the present embodiment, Differential Compression algorithm is used for transmission the difference of characteristic parameter, and adds in the data packet of compression
Banner word is added.
In most normal monitoring stages, it is only necessary to the difference between this characteristic parameter and a preceding characteristic parameter is transmitted,
For wireless acoustic emission sensor network, the characteristic parameter of extraction is amplitude respectively, the rise time, the duration, ringing number,
Hit-count and power supply, raw data packets form are as shown in Figure 6.
In the embodiment of the present invention, Differential Compression algorithm and existing algorithm difference lies in, the only difference of transmission feature parameter,
And be added to banner word, banner word indicates whether transmission amplitude, the rise time, the duration, Ring-down count, hit-count and
The data of power supply if the difference between this characteristic parameter and last characteristic parameter is zero, need not send characteristic parameter
Value, only need to be by the corresponding positions zero setting in flag byte, so the data packet format after the Differential Compression algorithm process is such as
Shown in Fig. 7.
Traditional data packet for needing to transmit 14 byte lengths, and after the Differential Compression algorithm process, data
Packet minimum length is 3 bytes, and maximum length is 9 bytes, i.e. maximum compression ratio is 64.3%, and minimum compression ratio is
21.4%, and without any loss of data, for receiving port, the data of data packet can be identified like clockwork.For example,
Assuming that each characteristic value difference is respectively：Amplitude：5.0, the rise time：2.2, the duration：4.0, Ring-down count：0.0, hit
Number：0.0, power supply：5.9, then data packet should be as shown in figure 8, data packet length be only 7 bytes, it is clear that has reached expected
Data compression effects.
Characteristics of Acoustic Emission supplemental characteristic is retransmited after the processing of above-mentioned Differential Compression algorithm to control terminal, Ke Yiyou
Effect reduces the power consumption of wireless acoustic emission sensor node, extends lithium battery service life, reduces data transmission period, and alleviate
The data pressure of the control terminal.
It is apparent to those skilled in the art that for convenience and simplicity of description, the device of foregoing description
And the specific work process of electronic equipment, the corresponding process in preceding method embodiment can be referred to, details are not described herein.
Flow chart and block diagram in attached drawing show multiple embodiment method and computer program products according to the present invention
Architectural framework in the cards, function and operation.In this regard, each box in flow chart or block diagram can represent one
A part for module, program segment or code, a part for the module, program segment or code are used to implement comprising one or more
The executable instruction of defined logic function.It should also be noted that in some implementations as replacements, the work(marked in box
It can also be occurred with being different from the sequence marked in attached drawing.For example, two continuous boxes can essentially be substantially parallel
Ground performs, they can also be performed in the opposite order sometimes, this is depended on the functions involved.It is also noted that block diagram
And/or the combination of each box in flow chart and the box in block diagram and/or flow chart, work(as defined in performing can be used
Can or action dedicated hardware based system come realize or can with the combination of specialized hardware and computer instruction come reality
It is existing.
In the description of the present invention, it should be noted that term " " center ", " on ", " under ", "left", "right", " vertical ",
The orientation or position relationship of the instructions such as " level ", " interior ", " outer " be based on orientation shown in the drawings or position relationship, merely to
Convenient for the description present invention and simplify description rather than instruction or imply signified device or element must have specific orientation,
With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.In addition, term " first ", " second ",
" third " is only used for description purpose, and it is not intended that instruction or hint relative importance.
In several embodiments provided herein, it should be understood that disclosed systems, devices and methods, it can be with
It realizes by another way.The apparatus embodiments described above are merely exemplary, for example, the division of the unit,
Only a kind of division of logic function, can there is other dividing mode in actual implementation, in another example, multiple units or component can
To combine or be desirably integrated into another system or some features can be ignored or does not perform.Another point, it is shown or beg for
The mutual coupling, direct-coupling or communication connection of opinion can be by some communication interfaces, device or unit it is indirect
Coupling or communication connection can be electrical, machinery or other forms.
The unit illustrated as separating component may or may not be physically separate, be shown as unit
The component shown may or may not be physical unit, you can be located at a place or can also be distributed to multiple
In network element.Some or all of unit therein can be selected according to the actual needs to realize the mesh of this embodiment scheme
's.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, it can also
That each unit is individually physically present, can also two or more units integrate in a unit.
If the function is realized in the form of SFU software functional unit and is independent product sale or in use, can be with
It is stored in the non-volatile computer read/write memory medium that a processor can perform.Based on such understanding, the present invention
The part that substantially contributes in other words to the prior art of technical solution or the part of the technical solution can be with software
The form of product embodies, which is stored in a storage medium, including some instructions use so that
One computer equipment (can be personal computer, server or the network equipment etc.) performs each embodiment institute of the present invention
State all or part of step of method.And aforementioned storage medium includes：USB flash disk, mobile hard disk, read-only memory (ROM, Read-
Only Memory), random access memory (RAM, Random Access Memory), magnetic disc or CD etc. are various can be with
Store the medium of program code.
Finally it should be noted that：Embodiment described above, only specific embodiment of the invention, to illustrate the present invention
Technical solution, rather than its limitations, protection scope of the present invention is not limited thereto, although with reference to the foregoing embodiments to this hair
It is bright to be described in detail, it will be understood by those of ordinary skill in the art that：Any one skilled in the art
In the technical scope disclosed by the present invention, it can still modify to the technical solution recorded in previous embodiment or can be light
It is readily conceivable that variation or equivalent replacement is carried out to which part technical characteristic；And these modifications, variation or replacement, do not make
The essence of corresponding technical solution is detached from the spirit and scope of technical solution of the embodiment of the present invention, should all cover the protection in the present invention
Within the scope of.Therefore, protection scope of the present invention described should be subject to the protection scope in claims.
Claims (10)
1. a kind of wood component health monitoring systems, which is characterized in that including：The multiple nothings being deployed on timber buildings wood component
Line acoustic emission sensor node and control terminal；
The wireless acoustic emission sensor node includes：Acoustic emission sensor, the first microcontroller；
The acoustic emission signal of the acoustic emission sensor acquisition wooden component, and the acoustic emission signal is sent to described the
One microcontroller；
First microcontroller carries out parameter extraction according to the acoustic emission signal, obtains characteristics of Acoustic Emission parameter, and pass through
After Differential Compression algorithm is to the characteristics of Acoustic Emission parameter processing, it is sent to the control terminal；
The control terminal obtains the health detection result of the wooden component according to treated the characteristics of Acoustic Emission parameter.
2. wood component health monitoring systems according to claim 1, which is characterized in that the wireless acoustic emission sensor section
Point further includes：Data acquisition module；
The data acquisition module is connect respectively with the acoustic emission sensor and first microcontroller；
The data acquisition module, the acoustic emission signal of wooden component detected to the acoustic emission sensor adopt at a high speed
Collection, first microcontroller is sent to by the signal after acquisition.
3. wood component health monitoring systems according to claim 2, which is characterized in that the wireless acoustic emission sensor section
Point further includes：Preamplifier, wave filter；
The preamplifier is connect respectively with the acoustic emission sensor and the wave filter；
The wave filter is connect with the data acquisition module；
The acoustic emission signal that the preamplifier acquires the acoustic emission sensor is amplified, by amplified signal
It is sent to the wave filter；
The wave filter is filtered the amplified signal, and filtered signal is sent to the data acquisition module
Block.
4. wood component health monitoring systems according to claim 1, which is characterized in that the wireless acoustic emission sensor section
Point further includes：First power management module, the first wireless transport module；
First power management module, first wireless transport module are connect respectively with first microcontroller；
First power management module, for detecting the first supply voltage value of the acoustic emission sensor, and by described
One supply voltage value sends out institute to first microcontroller；
First supply voltage value is sent to the control by first microcontroller by first wireless transport module
Terminal processed.
5. wood component health monitoring systems according to claim 1, which is characterized in that the wireless acoustic emission sensor section
Point further includes：First data memory module；
First data memory module is connect with first microcontroller；
First data memory module stores the data transmitted by first microcontroller；The data include：
Acoustic emission signal data, characteristics of Acoustic Emission supplemental characteristic.
6. wood component health monitoring systems according to claim 4, which is characterized in that the control terminal includes：Second
Microcontroller, warning device；
Second microcontroller is connect respectively with first microcontroller, the warning device；
Second microcontroller is used to receive the characteristics of Acoustic Emission parameter transmitted by first microcontroller, and to the sound
Transmitting characteristic parameter is analyzed, and obtains the health detection result of the wooden component；
Second microcontroller is additionally operable to receive first supply voltage value transmitted by first microcontroller, judges
When first supply voltage value is more than the first predetermined voltage threshold, the warning device is controlled to alarm.
7. wood component health monitoring systems according to claim 6, which is characterized in that the control terminal further includes：The
Two power management modules,
The second source management module is connect with second microcontroller；
The second source management module detects the second source voltage value of the control terminal, and in the second source voltage
When value is less than the second predetermined voltage threshold, automatically switches lithium battery and be powered.
8. wood component health monitoring systems according to claim 6, which is characterized in that the control terminal further includes：The
Two wireless transport modules, the second data memory module；
Second wireless transport module, second data memory module are connect respectively with second microcontroller；
Second microcontroller receives the number transmitted by first microcontroller by second wireless transport module
According to；
Second data memory module, for being stored to the data transmitted by second microcontroller.
9. a kind of wood component health monitor method, this method is applied to multiple wireless on timber buildings wood component by being deployed in
In the system of acoustic emission sensor node and control terminal composition, the wireless acoustic emission sensor node includes：Sound emission passes
Sensor, microcontroller；It is characterized in that, the method includes：
The acoustic emission signal of the acoustic emission sensor acquisition wooden component, and the acoustic emission signal is sent to described micro-
Controller；
The microcontroller carries out parameter extraction according to the acoustic emission signal, obtains characteristics of Acoustic Emission parameter, and pass through difference
After compression algorithm is to the characteristics of Acoustic Emission parameter processing, it is sent to the control terminal；
The control terminal obtains the health detection result of the wooden component according to treated the characteristics of Acoustic Emission parameter.
10. wood component health monitor method according to claim 9, which is characterized in that the Differential Compression algorithm is used for
The difference of the characteristic parameter is transmitted, and banner word is added in the data packet of compression.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810133502.XA CN108267510B (en) | 2018-02-08 | 2018-02-08 | Wood member health monitoring system and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810133502.XA CN108267510B (en) | 2018-02-08 | 2018-02-08 | Wood member health monitoring system and method |
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| CN108267510B (en) | 2023-10-24 |
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