CN101561420A - Intelligent acoustic emission continuous monitor - Google Patents
Intelligent acoustic emission continuous monitor Download PDFInfo
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- CN101561420A CN101561420A CNA2008100899816A CN200810089981A CN101561420A CN 101561420 A CN101561420 A CN 101561420A CN A2008100899816 A CNA2008100899816 A CN A2008100899816A CN 200810089981 A CN200810089981 A CN 200810089981A CN 101561420 A CN101561420 A CN 101561420A
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Abstract
The invention discloses an intelligent acoustic emission continuous monitor for the stability of materials such as rock, concrete, metal structure, and the like, in particular a motor for carrying out damage-free monitoring for the materials such as rock, concrete, metal structure and the like so as to predict the stability of the materials. The acoustic emission technique can realize real-time continuous rock monitoring and precisely analyze acoustic emission collecting data. The invention uses acoustic emission measuring theory to collect and monitor the characteristics of the parameters such as number of acoustic emission events, number of key events, acoustic emission rate, and the like. The monitor automatically calculates through a microprocessor, displays and stores typical acoustic emission parameters (number of acoustic emission events, number of key events and acoustic emission rate) in real time; a FLASH flash memory with 64 M capacity can continuously store data for 2-3 months. The data stored by the intelligent acoustic emission continuous monitor is analyzed and processed through self-developed PXAE rock acoustic emitter software.
Description
One, technical field
The present invention relates to a kind of rock mass, mix material monitoring methods such as earth and metal construction, is to use the method for acoustic emission continuous monitor to stability of material monitorings such as rock mass, mixed earth and metal constructions specifically.
Two, background technology
At present, acoustic emission has been widely applied to industries such as geology, water conservancy, earthquake, civil engineering and machinery as the not damaged detection means, especially uses more and more widely in rock mass damage detection and geostress survey.Rock mass damage is the principal element that influences underground works stability, and it is the effective means of analyzing underground works stability that acoustic emission detects rock mass.But the acoustic current emission is measured and is had many defectives, and operating personnel must detect at the scene during such as detection, can not realize it being real-time and continuous detecting basically, has a strong impact on the application that acoustic emission detects at the rock mass not damaged.The accurate mensuration of terrestrial stress state has crucial meaning for the design of mining excavation project, construction and stability analysis.Utilize the Kaiser effect of rock, measuring terrestrial stress by acoustic emission is that the short-cut method that can carry out in the laboratory at present has broad application prospects in rock mechanics and engineering field.But, Acoustic Emission of Rock is measured in the Study on Rock Stress, generally the acoustic emission parameter analytic approach of Cai Yonging is not utilized the full detail of acoustic emission, shortage has been subjected to considerable restraint to Acoustic emission signal processing and waveform recognition technical research thereby cause Acoustic Emission of Rock to measure the dark people ground research of terrestrial stress system.
Three, summary of the invention
The existing acoustic emission in rock body monitor that utilizes acoustic emission principle to make adopts the indication of LED (luminous digital diode) numeral mostly, to the acoustic emission in rock body signal demand manual record that collects, inefficiency and inconvenient statistical study and processing afterwards, can not guarantee simultaneously the continuity of observation process, have greatly limitation for underground works or the differentiation of slope rock mass long-time stability.
At above characteristics, in order to make acoustic emission can realize the monitoring of real-time continuous rock mass and accurately to analyze the acoustic emission image data.Developed intelligent acoustic emission in rock body monitor (being designated hereinafter simply as PXAE) voluntarily.Instrument adopts the acoustic emission measuring principle, and characteristic parameters such as the acoustie emission event number in rock mass, ground, the xoncrete structure, major issue number of packages, acoustic emission energy rate are carried out round-the-clock long-term continuous acquisition monitoring.Have characteristics such as parameter adjustment and easy to use, stability and reliability height, can carry out the security and stability monitoring rock mass such as mine top board, ore pillar, country rock and side slope, rock mass, dam, storehouse bank or xoncrete structure.
The present invention has adopted the low-power consumption microprocessor of 16 bit of reduced instruction set computer (RISC) structure and the sensitivity flush type calibrate AE sensor up to 90mv/g, acoustic emission parameter correlation statistical graph can be handled and export to the binding analysis process software, by analyzing the frequency and the energy variation trend of acoustic emission in rock body incident, can judge the stability of rock mass, therefore can be applicable to field rock mass engineering project stability continuous real-time monitorings such as mine, traffic, water power, geologic hazard.
Invention utilizes programme-controlled gain in conjunction with low noise amplifier circuit, make sensor monitors scope diameter up to 50 meters, sensor adopts the stainless steel waterproof construction, is easy to imbed in rock mass or the xoncrete structure, adopt the amplifying circuit of high driving ability, made sensor cable be 50 meters.Invention has realized the automatic computing of microprocessor, shows in real time and store typical acoustic emission parameter (acoustie emission event number, major issue number of packages harmony emission energy rate) that 64M high capacity FLASH flash memory can be stored 2-3 month data continuously.Developed PXAE acoustic emission in rock body instrument software voluntarily.Software has been realized the storage data are called in, analyze, handle, export acoustic emission parameter correlation statistical graph.Obtain the statistics variations rule of the total incident of acoustic emission, major issue, energy rate in the continuous monitoring time from the chart intuitively.
The present invention has mainly adopted following gordian technique to realize except having above distinguishing feature.
The gordian technique of 1 PXR001 calibrate AE sensor
(1) the inside copper billet of carving type has played the effect that similar machinery amplifies, and makes sensitivity greatly improve, and tubular structure has obtained maximum sensing area simultaneously, thereby obtains very high sensitivity.
(2) intelligent electric power management of sensor incorporated amplifier, collector can not cut off the power supply of amplifier when having signal, and can wake the power supply of opening amplifier when detecting signal up, makes instrument all weather operations for a long time.
(3) the built-in prime amplifier of sensor adopts the instrument amplifier of programme-controlled gain, can finely take into account the small-signal of the microvolt order of magnitude and the large-signal of voltage magnitude.
(4) calibrate AE sensor can be so that signal transmission distance increases greatly owing to the current mode operational amplifier that has adopted high capacity.
2 PXAE acoustic emission in rock body instrument are in the gordian technique of data storage
(1) microprocessor high capacity memory management technology, real-time storage has also realized power down protection, data storage is safe and reliable.
(2) standard usb bus mechanics of communication, it is very simple to make that data derive.
(3) lithium ion battery of the storage space of vast capacity and high power capacity makes instrument on-line monitoring for a long time.
(4) the RS232 interface of standard and RS485 interface make the extendability of instrument greatly expand.
3 PXAE acoustic emission in rock body instrument are converted to the gordian technique that adopts aspect the text in data
(1) data operation of microprocessor, demonstration, memory technology, but acoustic emission parameter flexibly customizing.
(2) the scalable and replacing of the data algorithm of microprocessor makes monitoring result more accurate and visual.
(3) standard format of compatible office software makes things convenient for the user to check and statistics.
(4) use of computer mathematics analysis software instrument makes that the function of ex-post analysis is more perfect and powerful.
Four, description of drawings
System's pie graph of Fig. 1 invention
Fig. 2 PXAE main frame profile
Fig. 3 high capacity acoustic emission parameter storage circuit diagram
The built-in amplification circuit diagram of the program control sensor of Fig. 4
Fig. 5 PXAE acoustic emission in rock body instrument analysis software figure
Below to the present invention will be described by reference to the accompanying drawings
Fig. 1 is system of the present invention pie graph, shown among the figure whole intelligent Acoustic radiating instrument signals collecting, signal storage, The thinking of a whole set of system's composed component of signal post-processing and whole invention, as seen from the figure major function of the present invention and The application space can be from thinking and the structure of the whole invention of macroscopic view understanding.
Fig. 2 is the face shaping of main frame of the present invention, and is practical, to be conveniently used in the engineering site test be main order of the present invention One of, therefore, the apparent size of main frame of the present invention is: length * wide * height=156mm * 94mm * 39mm, for the scene just In installation, the profile of main frame is cuboid, and regular and small and exquisite profile is that practical implementation is provided convenience.
Fig. 3 is big capacity acoustic emission parameters memory circuitry figure, and big capacity acoustic emission parameters memory is core of the present invention The position, it is in time stored the data of real time monitoring, all can produce a large amount of before and after rock mass destroys under effect of stress Acoustic emission, these parameters need jumbo memory to carry out long-term Coutinuous store, prepare against afterwards Treatment Analysis.
Fig. 4 is the built-in amplifying circuit of program-controlled transducer, is utilizing the acoustic emission in rock body monitoring equipment to carry out Test in Situ stability prison In the survey process, the acoustic emission that rock mass damage produces not necessarily just in time is positioned at the place, monitoring point that acoustic emission probe is laid, and therefore, passes Sensor must have certain scope of accepting and monitor the acoustic emission that surrounding rock body destroys generation, and the present invention is in the used biography of monitoring On the sensor on the circuit programme-controlled gain in conjunction with low noise amplifier circuit, so that Sensor monitoring scope diameter is up to 50 meters. Greatly carry The high space that utilizes of the present invention.
Fig. 5 is PXAE acoustic emission in rock body instrument analysis software figure, and this software is the poster processing soft of the present invention, by sensor, Main frame has been realized continuous monitoring and the storage of acoustic emission signal, has obtained total event, major issue, the energy of acoustic emission in rock body The main acoustic emission desired value such as rate has realized calling in, analyze, process and exporting of storage data by this software, is had Closing the statistical chart of three acoustic emission indexs, is that analysis result is very clear.
Five, embodiment
Embodiment:
(1) the PXAE main frame is installed in safe, firm position;
(2) sensor is imbedded in rock mass or the xoncrete structure;
(3) sensor is connected on the PXAE main frame;
(4) be provided with and regulate monitoring pattern, sampling time, sampling interval;
(5) signals collecting, collection is divided into normal collection and continuous acquisition.The start demonstration time is idle condition, will enter normal acquisition state in per 10 minutes, and normal acquisition time is 3 minutes, calculates and writes down once in per 10 seconds, and data arrive 1 page (528 byte) storage.Press in idle condition ↑ ↑/Lian Caijian enters the continuous acquisition state, and data are stored successively with normal image data;
(6) data derive operation, and data derive root to deriving USB flash disk and deriving palm PC;
(7) PXAE acoustic emission in rock body instrument software is installed;
(8) utilize software to carry out data analysis.
Claims (3)
1. intelligent acoustic emission continuous monitor, its collection by acoustic emission signal, the storage of acoustic emission signal, Analysis of Acoustic Emission Signal are handled three parts and are formed, it is characterized by: utilize sensor to realize the continuous acquisition of acoustic emission signal, realize the in good time continuously of acquired signal stored by the high capacity FLASH flash memory in the instrument, analyzing and processing has partly adopted composite material to stablize the signal processing analysis system of scoring model.
2. acoustic emission automonitor according to claim 1 is characterized in that the acoustic emission signal that occurs in rock mass inside is gathered for a long time continuously, and utilizes the in good time storage of the high-capacity flash memory realization image data of instrument internal.
3. acoustic emission automonitor according to claim 1 is characterized in that having compiled the poster processing soft at Monitoring Data, has realized calling in, analyze, differentiate, handle and exporting of acoustic emission signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100899816A CN101561420A (en) | 2008-04-15 | 2008-04-15 | Intelligent acoustic emission continuous monitor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100899816A CN101561420A (en) | 2008-04-15 | 2008-04-15 | Intelligent acoustic emission continuous monitor |
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| CN101561420A true CN101561420A (en) | 2009-10-21 |
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| CNA2008100899816A Pending CN101561420A (en) | 2008-04-15 | 2008-04-15 | Intelligent acoustic emission continuous monitor |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102298154A (en) * | 2011-04-20 | 2011-12-28 | 徐州福安科技有限公司 | Device and method for monitoring evolution and distribution of mining-induced fracture |
| CN102419348A (en) * | 2011-08-19 | 2012-04-18 | 北京航空航天大学 | Acoustic emission signal power type nondestructive detecting method based on fiber Bragg grating |
| CN103913514A (en) * | 2013-01-05 | 2014-07-09 | 山东三箭建设工程管理有限公司 | Method for monitoring temperature and gradient cracks of large-volume concrete |
| CN110609091A (en) * | 2019-09-10 | 2019-12-24 | 三峡大学 | Concrete corrosion acoustic emission signal data analysis processing system |
-
2008
- 2008-04-15 CN CNA2008100899816A patent/CN101561420A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102298154A (en) * | 2011-04-20 | 2011-12-28 | 徐州福安科技有限公司 | Device and method for monitoring evolution and distribution of mining-induced fracture |
| CN102298154B (en) * | 2011-04-20 | 2013-04-10 | 徐州福安科技有限公司 | Device and method for monitoring evolution and distribution of mining-induced fracture |
| CN102419348A (en) * | 2011-08-19 | 2012-04-18 | 北京航空航天大学 | Acoustic emission signal power type nondestructive detecting method based on fiber Bragg grating |
| CN102419348B (en) * | 2011-08-19 | 2013-05-08 | 北京航空航天大学 | Acoustic emission signal power type nondestructive detecting method based on fiber Bragg grating |
| CN103913514A (en) * | 2013-01-05 | 2014-07-09 | 山东三箭建设工程管理有限公司 | Method for monitoring temperature and gradient cracks of large-volume concrete |
| CN110609091A (en) * | 2019-09-10 | 2019-12-24 | 三峡大学 | Concrete corrosion acoustic emission signal data analysis processing system |
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Open date: 20091021 |