CN103075183B - Method for detecting information of survivors in mine disasters - Google Patents
Method for detecting information of survivors in mine disasters Download PDFInfo
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- CN103075183B CN103075183B CN201210576519.5A CN201210576519A CN103075183B CN 103075183 B CN103075183 B CN 103075183B CN 201210576519 A CN201210576519 A CN 201210576519A CN 103075183 B CN103075183 B CN 103075183B
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Abstract
The invention provides a method for detecting information of survivors in mine disasters. Specific to the inconvenience in transmitting underground and ground information in case of mine disasters, the invention provides a scheme for transmitting information through shock waves by taking an existing metal pipeline network in a mine area as a transmission medium and detecting survivors in mine holes in a way of detecting the shock waves generated by knocking metal pipelines in the mine holes by taking a plurality of ground sensors as receiving units. According to the method, the presence of trapped people can be determined reliably by detecting the shock waves generated by knocking the metal pipelines.
Description
Technical field
The invention belongs to Testing of Feeble Signals and treatment technology.
Background technology
Since entering 21 century, the development work of human life's search and location technology and equipment has caused the concern of many countries, and some developed countries are even by making laws or taking other measures to be fulfilled.China happens occasionally due to the natural calamity that meets with and accident of mine disaster, therefore, how has breakthrough in field of rescue equipment and becomes new topic.
For coal industry, geographical position due to hole, ore deposit is buried in underground, earth formation is complicated, conventional electrical information is difficult to penetrate bottom and is delivered to ground, on the other hand, subsurface equipment is easy to damage usually in seismic process, and Timeliness coverage and the rescue of these personnel that survive after giving mine disaster bring difficulty.As conventional electromagnetic signal will in underground about two, 300 meters to transmit and ground can receive, its transmitting and receiving apparatus all can very complicated (as myriametric wave equipment), and be subject to extraneous physics and hit and easily damage.And sound wave (between 20 hertz and 20 kilo hertzs) is when between frequency 4-24kHz, its penetration power is about 2m for general coarse chad, and earth is about 40m; When frequency is between 2-16kHz, its penetration power, for general coarse chad 6m, earth 80m, is launched under therefore sound wave (containing ultrasonic wave) is also unsuitable for mine.
Summary of the invention
Technical problem to be solved by this invention is, a kind of difficulty survival personal information detection method being applicable to mine disaster relief.
The present invention is that a kind of method detecting mine disaster survival personal information, is characterized in that for solving the problems of the technologies described above adopted technical scheme,
Multiple sensor is set respectively on the many metallic conduits extending to ground;
The shock wave that sensor knocks metallic conduit with the piping network in mining area produce for transmission medium receives in hole, ore deposit;
The signal received is sent to data processing unit by data acquisition unit by each sensor, and data processing unit carries out data processing and fusion to the signal that each sensor receives.
The inconvenience that when the present invention is directed to mine disaster, underground and terrestrial information transmit, propose with metallic conduit network ready-made in mining area as transmission medium, by shock wave transmission of information, with the multiple sensor in ground for receiving element, knock the shock wave of metallic conduit generation in detection hole, ore deposit to detect in hole, ore deposit the scheme of the personnel that survive.Shock wave can be propagated with the speed of 1 ~ 2 km per second in rock stratum, even if at mantle rock, also can have the spread speed of hundreds of meters per second.Geographical position due to hole, ore deposit is buried in underground, shock wave be reached ground, and shock wave communication media needs the medium considering that decay is little.The a large amount of metallic network of pipelines of ubiquity in mining area, until ground in hole, ore deposit, and after mine disaster occurs, because the ability of metallic media resistant to physical damage is strong, the destruction of metallic network of pipelines can't affect vibrations wave propagation.Therefore, the present invention adopts existing metallic network of pipelines in mining area to have as transmission medium and propagates soon, and propagation loss is little, the feature that anti-destructive is strong.Because hole, ore deposit inner metal tube net extends in all direction, can via arrival ground, multiple place, in order to increase signal detection rating, resist the situation of the local pipe fracture caused due to local physical damage, extend point all sensor installations at multiple surface duct, form sensor group.Further, when data processing unit knocks mode by analyzing the shock wave accurate reproduction received, just can be carried out transmission of information provided reliable technical support by certain coding that knocks for survival personnel in hole, ore deposit, information can comprise particular location and personnel's number etc. as survival personnel.
Concrete, described sensor is three component sensor.Data processing unit is analyzed three component datas in each sensor by wavelet decomposition, remerges the shock wave data that three-component reception data obtain from this sensor.
The invention has the beneficial effects as follows, reliably can detect the existence of knocking the shock wave determination trapped personnel that metallic conduit produces, further by exactly reduce the mode of knocking obtain mine disaster survival person related information, contribute to carrying out rescue work in time, improve rescue efficiency.
Accompanying drawing explanation
Fig. 1 is embodiment System's composition schematic diagram;
Fig. 2 is that system sensor settles schematic diagram;
Fig. 3 is that sensor receives first polytropism schematic diagram;
Fig. 4 is embodiment survival personnel number information code pattern;
Fig. 5 is embodiment survival personnel location information code pattern
Fig. 6 is each component primary signal (a) of embodiment single-sensor and testing result (b);
Fig. 7 is embodiment different sensors reception condition;
Fig. 8 is embodiment data fusion result.
Detailed description of the invention
Detect for colliery shock wave, system as shown in Figure 1, comprise n three-component high-precision sensor, a n data acquisition unit and data processing unit, the data on receive three components are sent to data processing unit by coupled data acquisition unit by each three-component high-precision sensor.Ground metal pipe outlet has n, be then fixed thereon by three-component high-precision sensor at this n exit pipe clamp, as shown in Figure 2.Three-component high-precision sensor as shown in Figure 3, gathers shock wave from orthogonal x, y, z three component directions.The vibrations wave frequency produced by knocking metal is between a few to tens of hertz.Here the frequency range of the Received signal strength of sensor should comprise the frequency range of knocking shock wave, in order to ensure the reliability received, the receive frequency range of extension sensor group, the receiving center frequency of each sensor setting can offset to some extent, centre frequency as sensor 1 is 13Hz, the centre frequency of sensor 2 is 16Hz, and the centre frequency of sensor n is 20Hz.
Coding and the mode of knocking are arranged: main transmission two important informations, one is current location survival personnel numbers, and two is general geographic location.
Such as, the transmission of survival personnel information of number be information code harbour with 33, and expression follow-up is survival personnel information of number, after represent thousand with 3 10 systems within personnel's number.Concrete method for expressing is: the digital n representing transmission with interval for about 3 seconds under double hit n, and numeral 0 gets off to represent with double hit 10.Be 421 people as needs transmit current location survival personnel number, then actual to send code word is 33421, knocks metallic conduit in the mode of such as Fig. 4.As need be repeatedly sent this information, then after upper once information completes, interval retransmits 33421 in more than 15 seconds.
It is information code harbour that geographical location information transmits with 22, represents that follow-up is survival personnel geographical location information.Geographical location information is divided in a grid formation according to drive true form and size in advance by mining area, then be numbered.Such as, as needs inform that ground exists survival personnel in No. 121 regions, then send 22121, specifically knock mode as shown in Figure 5.As need be repeatedly sent this information, then after upper once information completes, interval retransmits 22121 in more than 15 seconds.
Geography information and number information can alternately send, and after sending 33421, interval 15 seconds is 22121 as what send, then represent that what next send is geographical location information.
As in advance not the mode of knocking arrange, sensing system then regularly can only knock the existence that Sasser determines survival personnel by detecting.
Knocking delivers to data processing unit after being sent to data acquisition unit by the single-sensor that ground is attached on metallic conduit, adopts Daubechies wavelet basis to carry out 5 grades of discrete wavelet transformation, extracts 3rd level detail coefficients cA in wavelet decomposition
3, according to cA
3mode is knocked in reduction.
Analyze with the data instance of actual acquisition, knock place from reception place 1 km.Transmission of information word is 3, and interval double hit in 5 seconds 3 times metallic conduits, the signal that in the sensor group on ground, a certain three component sensor receives is as shown in Fig. 6 (a), and the information received is sent to data processing unit after data acquisition unit collection.Fig. 6 (b) is through signal detection post processing result, wherein, consider some influence of noises, the pulse that interval is less than 0.5 second by data processing unit filters, result can be found out from Fig. 6 (b), the characteristic propagated due to Sasser and the polytropism of medium, effective reception that causes having only had to carry out in sensor three components.Be decoded as 3.Achieve correct information transmission.
With a beat for different receiving element, its time of advent difference to some extent, but because metallic media spread speed is fast, so each receiving element Sasser is less than 1 second the time of advent, therefore, when processing each receiving element data, the Sasser from being separated by of different receiving element ± within 0.5 second is thought from same source.Because the quality of propagation path is different, the problem that some receiving element is undetected may be there is, but owing to being that multisensor receives, have most sensor to receive signal as long as can think in the roughly the same moment, then think that this moment exists knocking.Through data processing unit to Fusion, in the loss to a certain degree reducing knocking, information reverting degree can be improved.Such as, when sensor group is made up of 3 sensors, due to the difference of propagation path, these 3 sensor Received signal strength as shown in Figure 7, the signal causing 3 sensors to receive all has difference, and as seen from the figure, No. 1 sensor receives information bit 21121, No. 2 sensors receive information bit 22111, No. 3 sensors and receive information bit 12121.Data processing unit is through the comparison of identical reception situation, and final system comprehensively exports as result shown in Fig. 8, and namely 22121, be interpreted as " geographical position is in No. 121 regions " thus effectively reduce by metallic conduit transmission of information.
Claims (3)
1. detect a method for mine disaster survival personal information, it is characterized in that, comprising:
Multiple sensor is set respectively on the many metallic conduits extending to ground;
The shock wave that sensor knocks metallic conduit with the piping network in mining area produce for transmission medium receives in hole, ore deposit;
The signal received is sent to data processing unit by data acquisition unit by each sensor, and data processing unit carries out data processing and fusion to the signal that each sensor receives;
Data processing unit filters the pulse that the interval coming from same sensor is less than minimum interval; Data processing unit is analyzed three component datas in each sensor by wavelet decomposition, remerges the shock wave data that three-component reception data obtain from this sensor; The Sasser pulse be divided into mutually in minimum interval from different sensors, when merging the data from different sensors, is judged as same Sasser pulse by data processing unit.
2. a kind of method detecting mine disaster survival personal information as claimed in claim 1, it is characterized in that, described sensor is three component sensor.
3. a kind of method detecting mine disaster survival personal information as claimed in claim 1, it is characterized in that, described minimum interval is 0.5 second.
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| CN201210576519.5A CN103075183B (en) | 2012-12-27 | 2012-12-27 | Method for detecting information of survivors in mine disasters |
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| CN103075183B true CN103075183B (en) | 2015-07-15 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101834675A (en) * | 2010-04-29 | 2010-09-15 | 四川大学 | Method for carrying out sound communication on underground and ground during underground rescue |
| CN102096065A (en) * | 2010-11-16 | 2011-06-15 | 东北师范大学 | Rescuing and positioning system by knocks for mine disaster |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| PL191697B1 (en) * | 1999-07-09 | 2006-06-30 | Dbt Gmbh | Method of and system for controlling roof support sections in a manner taking into account presence of a screw in a relevant mine working |
| CN101265812A (en) * | 2008-05-09 | 2008-09-17 | 山东大学 | Electricity-free optical fiber vibration calling system for down-hole of mine |
| CN202250234U (en) * | 2011-09-13 | 2012-05-30 | 代剑华 | Passive post-disaster downhole information acquisition system with positioning capability |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101834675A (en) * | 2010-04-29 | 2010-09-15 | 四川大学 | Method for carrying out sound communication on underground and ground during underground rescue |
| CN102096065A (en) * | 2010-11-16 | 2011-06-15 | 东北师范大学 | Rescuing and positioning system by knocks for mine disaster |
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