CN104198679B - A kind of oil from coal process Full wave shape simultaneous synthesis Monitoring systems and method - Google Patents
A kind of oil from coal process Full wave shape simultaneous synthesis Monitoring systems and method Download PDFInfo
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- CN104198679B CN104198679B CN201410473355.2A CN201410473355A CN104198679B CN 104198679 B CN104198679 B CN 104198679B CN 201410473355 A CN201410473355 A CN 201410473355A CN 104198679 B CN104198679 B CN 104198679B
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Abstract
A kind of oil from coal process Full wave shape simultaneous synthesis Monitoring systems and method, belong to oil from coal monitoring field. This system comprises: add mounted mechanism, sensor unit, data processing unit, controller, indicating meter and data storage equipment; The present invention's employing adds mounted mechanism and coal petrography sample deformation is broken, in oil from coal process, self-potential, electric charge induction and acoustic emission signal is synchronously gathered by controller control sensor unit and data processing unit, and store in data storage equipment, show the Full wave shape synchronizing signal of oil from coal process self-potential, electric charge induction and acoustic emission signal in the display in real time. This system and method can synchronously monitor the self-potential in oil from coal process, electric charge induction and acoustic emission signal, obtain Full wave shape synchronizing signal, and this system architecture is simple, cost of manufacture is low, can odd row signal synchronously gather, acquisition time long, simple to operate.
Description
Technical field
The invention belongs to oil from coal monitoring field, it is specifically related to a kind of oil from coal process Full wave shape simultaneous synthesis Monitoring systems and method.
Background technology
Rock burst is the serious natural disaster of mine, along with the increasing of digging intensity and the degree of depth, field conditions is more and more complicated, does not originally have the mine of danger of burst impact phenomenon also occur, and the mine power disasters such as rock burst have become the chief threat that mining area safety is produced. Therefore to the making accurately of rock burst, timely prediction, and then take measures, there is the particularly important of just change in that prevents and treats disaster, become the important task of scientific worker and mining engineering and technology personnel, it is key scientific problems in the urgent need to address in national economy and social development.
The self-potential monitoring of rock burst, electric charge induction are monitored and acoustic emission monitoring respectively has superiority, but the rock burst precursor information applying the acquisition of single monitoring means is often not accurate enough, and the monitoring result of single monitoring means is with one-sidedness, the unstable fracture rule of development of mine deep part rock mass can not reacted more all-sidedly and accurately. In recent years, oil from coal process precursor signal observation technology obtains significant improvement, but it is all independent observation mostly, mostly can only record the data such as ring counting, incident duration, energy, rise time, and Full wave shape (the signal waveform that full frequency band is whole) cannot be obtained, waveform cannot be transmitted, lose and more have effective information.
Consequently, it is desirable to a kind of experimental system can monitor the self-potential in oil from coal process, electric charge induction and acoustic emission signal simultaneously, obtain the Full wave shape synchronizing signal of oil from coal process self-potential, electric charge induction and acoustic emission signal.
Summary of the invention
For the deficiency that prior art exists, the present invention provides a kind of oil from coal process Full wave shape simultaneous synthesis Monitoring systems.
The technical scheme of the present invention:
A kind of oil from coal process Full wave shape simultaneous synthesis Monitoring systems, comprising: add mounted mechanism, sensor unit, data processing unit, controller, indicating meter and data storage equipment;
Described sensor unit, comprises multiple self-potential sensor, multiple calibrate AE sensor and multiple charge sensor; The input terminus of described sensor unit connects the electrode probe of multiple self-potential sensor, the acoustic emission probe of multiple calibrate AE sensor, the electric charge probe of multiple charge sensor and an output terminal of controller simultaneously; The described electrode probe of multiple self-potential sensor and the acoustic emission probe of multiple calibrate AE sensor, to avoid crackle as principle, be arranged in coal petrography sample body and may occur on the neighbouring position of crackle; The electric charge probe distribution of described multiple charge sensor is placed in position near coal petrography sample;
The output terminal of described sensor unit connects an input terminus of data processing unit, and an output terminal of data processing unit connects an input terminus of indicating meter, and another output terminal of data processing unit connects the input terminus of data storage equipment;
2nd output terminal of described controller connects another input terminus of data processing unit, and the 3rd output terminal of controller connects another input terminus of indicating meter; The input terminus of described controller carries out man-machine interaction by man-machine interaction interface;
Described data processing unit, comprising: analog to digital converter and data buffer memory device; The input terminus of described analog to digital converter is as the output terminal of a sensor input connection unit of data processing unit; The output terminal of described analog to digital converter connects an input terminus of data buffer memory device; Another input terminus of data buffer memory device is as the 2nd output terminal of another input terminus connection control device of data processing unit, an output terminal of data buffer memory device connects the input terminus of data storage equipment, and another output terminal of data buffer memory device connects another input terminus of indicating meter.
Coal petrography sample is placed in the loading area adding mounted mechanism, described in add mounted mechanism for for being loaded by coal petrography sample, make coal petrography sample produce the mechanism of deformation fracture.
The electrode probe of self-potential sensor directly contacts with the surperficial of corresponding position of rock mass sample respectively with the acoustic emission probe of calibrate AE sensor, and contact surface couplant is coupled.
Described sensor unit is used for according to the corresponding steering order of controller, synchronous self-potential, electric charge induction and the acoustic emission Full wave shape signal gathering coal petrography sample deformation rupture process and producing, and synchronously converts analog electrical signal to and send data processing unit to.
Described controller is for sending corresponding steering order to sensor unit, data processing unit and indicating meter.
Described data processing unit is used for according to the corresponding steering order of controller, receive and the analog electrical signal of amplification sensor unit transmission, and be converted into digital electric signal, and the digital electric signal after conversion be sent to data storage equipment and carry out storing, be also sent to indicating meter simultaneously and show.
Described data storage equipment is for receiving and stores self-potential, electric charge induction and the acoustic emission digital electric signal that analog to digital converter transmits.
Described indicating meter is used for according to the corresponding steering order of controller, and real-time self-potential, electric charge induction and acoustic emission signal Full wave shape are carried out simultaneous display.
Adopt copper net, make enclosed type electric magnetic shield member by coal petrography sample, add mounted mechanism, sensor unit all cover in this electromagnetic shielding component, sensor units synchronization is gathered the interference of self-potential, electric charge induction and acoustic emission signal process by shielding extraneous electromagnetic signal.
Oil from coal process Full wave shape simultaneous synthesis Monitoring systems described in employing carries out the method for oil from coal process Full wave shape simultaneous synthesis monitoring, comprises following concrete steps:
Step 1: coal petrography sample is fixed on the corresponding loading area adding mounted mechanism; The described mounted mechanism that adds is for for being loaded by coal petrography sample, making coal petrography sample produce the mechanism of deformation fracture;
Step 2: arrange the electrode probe of self-potential sensor, the acoustic emission probe of calibrate AE sensor in coal petrography sample body, meanwhile, near coal petrography sample, the electric charge probe of charge sensor is settled in position;
Shape according to coal petrography sample to be monitored, joint, cranny development situation and rule of breaking, by the acoustic emission probe of the electrode probe of multiple self-potential sensor and multiple calibrate AE sensor, to avoid crackle as principle, being arranged in coal petrography sample body may occur on the neighbouring position of crackle, the electric charge probe distribution of multiple charge sensor is placed in position near coal petrography sample simultaneously;
Step 3: on the controller acquisition parameter is arranged or adjust, described acquisition parameter comprises: sample frequency, sampling channel, data preserve position and data storage file name;
Step 4: start up system, starts the self-potential of pre-acquired coal petrography sample, electric charge induction and acoustic emission Full wave shape signal, and carries out display in real time over the display but do not preserve;
Step 5: according to the Full wave shape signal waveform of indicating meter display, judge whether noise signal amplitude is in tolerance interval, be, then perform step 6, no, then perform step 3;
Step 6: arranging loading velocity, loading regime on mounted mechanism adding, coal petrography sample is loaded by start-up loading mechanism;
Step 7: according to the corresponding steering order of controller, the self-potential collected, electric charge induction and acoustic emission signal data are synchronously sent in real time data storage equipment for upper layer application, simultaneously be also synchronously sent to indicating meter carry out signal Full wave shape display;
Step 8: after coal petrography sample destroys, stops adding mounted mechanism and signals collecting simultaneously.
Useful effect: the oil from coal process Full wave shape simultaneous synthesis Monitoring systems of the present invention can synchronously monitor the self-potential in oil from coal process, electric charge induction and acoustic emission signal, obtains the Full wave shape synchronizing signal of oil from coal process self-potential, electric charge induction and acoustic emission signal. The system architecture of the present invention is simple, cost of manufacture is low, can odd row signal synchronously gather, acquisition time long, simple to operate.
Accompanying drawing explanation
Fig. 1 is the oil from coal process Full wave shape simultaneous synthesis Monitoring systems structural representation of one embodiment of the present invention;
Fig. 2 is the Sense Amplification device schematic circuit diagram of the self-potential sensor that one embodiment of the present invention adopts;
Fig. 3 is the pre-amplification circuit schematic diagram of the charge sensor that one embodiment of the present invention adopts;
Fig. 4 is the structural representation of the data processing unit of one embodiment of the present invention;
Fig. 5 is the oil from coal process Full wave shape simultaneous synthesis monitoring method schema of one embodiment of the present invention;
Fig. 6 is the position distribution schematic diagram on coal petrography sample of popping one's head in of the various sensors of one embodiment of the present invention.
Wherein, 1. 7. acoustic emission probe 8. electric charges are popped one's head in 9. sensor unit 10. data processing unit 101. analog to digital converter 102. data buffer memory device 11. indicating meter 12. hard disk 13. controller 14. electromagnetic shielding components by overdraft 6. electrode probe of upward pressure head 5. pressing machine of lower insulation cushion block 4. pressing machine of the upper insulation cushion block 3. pressing machine overdraft head of coal petrography sample 2. pressing machine upward pressure head.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is done explanation in detail.
One embodiment of the present invention provides oil from coal process Full wave shape simultaneous synthesis Monitoring systems, structure block diagram as shown in Figure 1, comprising: pressing machine, sensor unit 9, data processing unit 10, indicating meter 11, hard disk 12, controller 13, electromagnetic shielding component 14;
Present embodiment add mounted mechanism adopt be pressing machine, utilizing pressing machine to be loaded by coal petrography sample makes coal petrography sample deformation break, the pressing machine adopted is the microcomputer controlled electro-hydraulic servo universal hydraulic testing machine of the WAW-600D that Jinan Fang Chen plant and instrument company limited produces, maximum test force reaches 600KN, this trier tests power, displacement, speed by microcomputer control, from the obtaining of experimental data, process, print, all realize automatization. When specific experiment, pressing machine adopts two kinds of load controlling mode that coal petrography sample 1 is carried out uniaxial loading, and loading velocity general control is at 20��500N/s.
What present embodiment data storage equipment adopted is hard disk 12, and model is WD1502FAEX.
The sensor unit that present embodiment adopts, comprises 6 self-potential sensors, 6 calibrate AE sensors and 4 charge sensors. The input terminus of sensor unit 9 connects the electrode probe of 6 self-potential sensors, the acoustic emission probe of 6 calibrate AE sensors, the electric charge probe of 4 charge sensors and an output terminal of controller 13 simultaneously; The output terminal of described sensor unit 9 connects an input terminus of data processing unit 10, and an output terminal of data processing unit 10 connects an input terminus of indicating meter 11, and another output terminal of data processing unit 10 connects the input terminus of data storage equipment; 2nd output terminal of controller 13 connects another input terminus of data processing unit 10, and the 3rd output terminal of controller 13 connects another input terminus of indicating meter 11; The input terminus of described controller 13 carries out man-machine interaction by man-machine interaction interface;
6 and Sense Amplification device are made up of by the self-potential sensor that present embodiment adopts electrode probe. The circular copper sheet of two electrode probes are diameter to be 5mm, thickness be 0.5mm. Sense Amplification device, as shown in Figure 2, by charge-sensitive level with amplify output stage two portions and form, the integrated operational amplifier that described charge-sensitive level is LMC6001 primarily of input resistance height, fast response time, open-loop gain model big, paster encapsulation is formed; The integrated operational amplifier that described amplification output stage is 0P07 primarily of CR-RC wave filter and model is formed, and wherein CR-RC wave filter is made up of electric capacity C11, resistance R9, resistance R10 and electric capacity C12; The input terminus of LMC6001 type integrated operational amplifier, i.e. 2 pin and 3 pin, connect two electrode probes, the output terminal of the integrated operational amplifier of LMC6001 respectively, and namely 6 pin connect CR-RC filter input end, are namely connected with electric capacity C11; The output terminal of CR-RC wave filter, namely electric capacity C12 is by the input terminus of resistance R2 and 0P07 type integrated operational amplifier, and namely 2 pin are connected in parallel; And parallel feedback electric capacity C2 and feedback resistance R1 to increase the sensitivity of the faint self-potential signal of electrode pair and improves the signal to noise ratio of sensor respectively between 2 pin and 6 pin of LMC6001 type integrated operational amplifier; By the gain control end (i.e. GAIN end and 6 pin) of 0P07 type integrated operational amplifier non-essential resistance in parallel, the magnification amplifying output stage can be regulated arbitrarily between 1��101 times.
The model of the calibrate AE sensor that present embodiment adopts is PK31, acoustic emission probe 7 is the supporting acoustic emission probe of PK31 type calibrate AE sensor, PK31 type calibrate AE sensor is produced by American Physical acoustics company (PAC), sensitivity is 106db, and operating frequency is 15-40kHz.
The charge sensor that present embodiment adopts is made up of electric charge probe 8 and pre-amplification circuit, what wherein pre-amplification circuit adopted is the pre-amplification circuit 2 that in Chinese patent ZL200810013033.4, accompanying drawing 3 provides, as shown in Figure 3, it is documented in the first paragraph of Instructions Page 3 of this patent, namely pre-amplification circuit comprises AD8066 type operational amplifier U1A and U1B, chemical capacitor C24, C25, C36��C38, electric capacity C26��C35 and resistance R18��R27; 1 pin of U1A connects R20, C28, C31 one end, 2 pin connect the other end of C30 one end and C28, R20,3 pin ground connection, and 4 pin connect the negative pole of negative electricity source, C35 one end and C37,8 pin connect the positive pole of positive power supply, C34 one end and C38, and the negative pole of C34, C35 the other end, C38 and the positive pole of C37 connect and ground connection; IN connects the other end of C29, R19 one end and C30, another termination R21 one end of C29, R21 the other end ground connection, another termination C25 positive pole of R19, C27, R18 one end, another termination C24 positive pole of R18, C26 one end and HV power supply, C25, C24 negative pole and C27, C26 the other end connect and ground connection; 4 pin of U1B connect negative electricity source, 5 pin connect R25, R27 one end and C36 positive pole, 6 pin connect the R25 the other end, R24, R26 and C33 one end, 7 pin meet R26, C33 the other end and OUT, 8 pin connect positive power supply, another termination C32 of R24, R23 one end, another termination R22 one end of R23 and the C31 the other end, R22, R27, C32 the other end and C36 negative pole connect and ground connection. Electric charge probe 8 is directly connected to the input terminus IN end of pre-amplification circuit with shielding wire. Electric charge 8 materials of popping one's head in are magnetically soft alloy material, and electric charge (electric field) is had higher sensitivity, and electric charge pops one's head in 8 shapes for circular, and diameter has 10mm, 20mm, 30mm tri-kinds. Present embodiment adopts copper sheet that the circuit card of pre-amplification circuit carries out packaging shielding, can limit external electromagnetic signal to greatest extent to the interference of circuit, and the pre-amplification circuit shape after packaging is cylindrical, is of a size of �� 30 �� 100mm.
The structure of the data processing unit 10 that present embodiment adopts, as shown in Figure 4, comprising: analog to digital converter 101 and data buffer memory device 102. The input terminus of described analog to digital converter 101 is as the output terminal of a sensor input connection unit 9 of data processing unit 10; The output terminal of described analog to digital converter 101 connects an input terminus of data buffer memory device 102; Another input terminus of data buffer memory device 102 is as the 2nd output terminal of another input terminus connection control device 13 of data processing unit 10, an output terminal of data buffer memory device 102 connects the input terminus of data storage equipment, and another output terminal of data buffer memory device 102 connects another input terminus of indicating meter 11.
The analog to digital converter that present embodiment adopts is made up of prime amplifier and analog to digital conversion circuit. Prime amplifier is placed between sensor unit 9 and analog to digital conversion circuit, the prime amplifier that present embodiment adopts is the AWA14604 type ICP prime amplifier with 10 times of voltage gains, can by low level signal amplification on standard level, synchronous reception self-potential, electric charge induction and acoustic emission signal that also amplification sensor unit transmits, and the self-potential after amplification, electric charge induction and acoustic emission analog telecommunications number are sent to analog to digital conversion processing of circuit. Analog to digital conversion circuit is used for the self-potential after the amplification of synchronous receiving preamplifier, electric charge induction and acoustic emission analog telecommunications number, and these signals are synchronously converted to numerary signal and are sent to data buffer memory device 102,16 modulus conversion chips of the analog to digital conversion circuit that present embodiment adopts to be model be AD976AANZ, the main technical details of AD976AANZ type modulus conversion chip is: 16 bit resolutions, 200KSPS sample, and percent of pass, differential input, parallel code export, the switching time of 3.8 �� s. Data buffer memory device 102 receives the numerary signal of AD976AANZ type analog to digital converter and is saved to hard disk 12, the rule of coal petrography self-potential, electric charge induction and acoustic emission signal that deformation fracture process produces under different loading environment is analyzed for upper layer application, obtain the mutual relationship between three kinds of signals, obtain coal petrography self-potential and electric charge generation mechanism, for the integrated forecasting that carries out of mine motive force disaster is provided laboratory experiment and theoretical foundation by the method adopting self-potential, electric charge induction and acoustic emission to combine. The data buffer memory device 102 that present embodiment adopts is the data buffer memory device that model is IS63LV1024-15TI, and IS63LV1024-15TI type data buffer memory device is nanosecond highspeed static memory, low in energy consumption, read or write speed is fast, not power-off does not then disappear, and need not refresh, 128Kbytes.
The controller 13 adopted in present embodiment adopts embedded Webserver as center sampling controller, and the model of the mainboard of employing is IntelDesktopBoardD201GLY, and the CPU of employing is Atom525 (double-core four thread), and dominant frequency reaches 1800M. Controller 13 is connected with indicating meter 11 with the data buffer memory device in data processing unit respectively, controller 13 arranges transmission indicator signal according to operating parameter, the simulating signal that IS63LV1024-15TI type data buffer memory device receiving sensor unit 9 in control data processing unit 10 exports, control indicating meter 11 displaying data in real-time processing unit 10 receive real-time self-potential, sound, electric charge induction signal, the signal of 16 passages can be shown, it is possible to select a few channel signals to show simultaneously. Setting according to operating parameter, can control the data acquiring frequency (below 100kHz is adjustable) of data processing unit 10, position that the passage of data gathering, data preserve and the filename that data preserve. Setting according to operating parameter, controller 13 can control indicating meter 11 channel indication signal, signal drawing scope, shows the average and variance etc. of every channel signal simultaneously.
The indicating meter 11 adopted in present embodiment is Samsung 152N indicating meter, and resolving power is 1024x768. Indicating meter 11 for the instruction according to controller 13, the waveform of real-time self-potential in the 0.5s that display data processing unit collects, electric charge induction and acoustic emission signal.
What the electromagnetic shielding component 14 of present embodiment adopted is copper net, make the rectangular parallelepiped of 400mmx400mmx150mm, and be connected to ground, the upper insulation cushion block 2 of coal petrography sample 1, pressing machine upward pressure head 4, pressing machine overdraft 5, pressing machine upward pressure head, the lower insulation cushion block 3 of pressing machine overdraft head, electrode probe to 6, acoustic emission probe 7, electric charge probe 8, sensor unit 9 all cover in electromagnetic shielding component, sensor units synchronization is gathered the interference of self-potential, electric charge induction and acoustic emission signal process by shielding extraneous electromagnetic signal.
Adopt the oil from coal process Full wave shape simultaneous synthesis Monitoring systems of present embodiment to carry out the method for oil from coal process Full wave shape simultaneous synthesis monitoring, as shown in Figure 5, start from step 501.
In step 502, first prepare diameter with highly than for 1: 2 cylindrical coal petrography sample, present embodiment adopt cylindrical coal petrography sample 1 diameter be 50mm, height is 100mm.
In step 503, this cylindrical coal petrography sample 1 is uprightly placed between pressing machine upward pressure head 4 and pressing machine overdraft 5, it is respectively arranged with the upper insulation cushion block 2 of pressing machine upward pressure head, the lower insulation cushion block 3 of pressing machine overdraft head in pressing machine upward pressure head 4, pressing machine overdraft 5 with the contact surface of two bottom surfaces of cylindrical coal petrography sample 1 simultaneously, as shown in Figure 1, the material of insulation cushion block is tetrafluoroethylene.
In step 504, input terminus, electric charge that electrode probe is connected to self-potential sensor are popped one's head in and are connected to the input terminus of charge sensor, and acoustic emission probe is connected to the input terminus of calibrate AE sensor.
In step 505, observe joint and the cranny development situation of coal petrography sample, according to the rule of specimen shape and specimen broke, by the acoustic emission probe of the electrode probe of multiple self-potential sensor and multiple calibrate AE sensor, to avoid crackle as principle, being arranged in coal petrography sample may occur on the neighbouring surface of crack position, the electric charge probe distribution of multiple charge sensor is placed in position near coal petrography sample simultaneously;
The position distribution of the sensor probe of present embodiment on coal petrography sample, as shown in Figure 6, electrode probe and acoustic emission probe are all coupling on coal petrography sample by conductive copper glue or conductive silver glue couplant, and blend compounds band and sample are close to, electric charge probe is 10mm with the distance of coal petrography specimen surface. wherein, because each self-potential sensor has pair of electrodes probe, in present embodiment, the electrode probe of each self-potential sensor is to arrange in pairs at a distance of 8mm, wherein first to the 3rd, electrode probe is distributed in along, on same article of straight line of sample axis, this straight line setting their places is 0 �� of initial line of axis of coal petrography sample 1. electrode probe is arranged in the mid point of 0 �� of initial line of axis by the 2nd, the distance of electrode probe is 30mm by electrode probe, the 3rd by electrode probe and first by the 2nd, the distance of first pair of electrode probe and cylindrical coal petrography sample upper surface is 20mm, and the distance of electrode probe and cylindrical coal petrography sample lower surface is also 20mm by the 3rd, electrode probe is arranged on the intersection point of 90 �� of axial line of cylindrical coal petrography sample, 270 �� of axial line and its intermediate cross-section line by the 4th by electrode probe, the 5th, the 6th is arranged in 180 �� of axial line to electrode probe, distance 25mm place, coal petrography sample upper surface, first acoustic emission probe, the rising tone launch Probe arrangement on 45 �� of axial straight lines of coal petrography sample, wherein the first acoustic emission probe is positioned at apart from 20mm place, cylindrical coal petrography sample upper surface, and the rising tone is launched probe and is positioned at apart from 20mm place, cylindrical coal petrography sample lower surface. 3rd acoustic emission probe, the falling tone launch Probe arrangement on 135 �� of axial straight lines of coal petrography sample, and wherein the 3rd acoustic emission probe is apart from 20mm place, cylindrical coal petrography sample upper surface, and the falling tone launches 20mm place, probe distance cylindrical coal petrography sample lower surface. 5th acoustic emission probe, the 6th acoustic emission probe are arranged in 315 �� of axial line, 225 �� of axial line, and the 5th acoustic emission probe is positioned at distance 20mm place, coal petrography sample upper surface, the 6th acoustic emission probe distance 20mm place, coal petrography sample lower surface, first electric charge is popped one's head in the 4th electric charge Probe arrangement near the cylindrical coal petrography sample apart from cylindrical coal petrography specimen surface 10mm, wherein the first electric charge probe, 2nd electric charge probe is arranged in 45 �� of axial line of cylindrical coal petrography sample, near the position that 135 �� of axial line are crossing with its intermediate cross-section, 3rd electric charge Probe arrangement is in 225 �� of axial line of cylindrical coal petrography sample, and near the position of distance coal petrography sample upper surface 25mm, 4th electric charge Probe arrangement is in 315 �� of axial line of cylindrical coal petrography sample, and near the position of distance coal petrography sample lower surface 25mm.
In step 506, trigger pressure machine, and do not load, because having bigger noise signal when pressing machine starts, after equipressure machine operates steadily, then load.
In step 507, on the controller acquisition parameter is arranged or adjust, described acquisition parameter comprises: sample frequency (sample frequency of present embodiment is 100kHz to the maximum, adjustable in 500Hz to 100kHz scope), sampling channel (sampling channel of present embodiment is 16 passages to the maximum), data preserve position and data storage file name etc.;
In step 508, start up system, starts the self-potential of pre-acquired coal petrography sample, electric charge induction and acoustic emission Full wave shape signal, and carries out display in real time over the display but be not saved in hard disk;
Native system can when sample frequency be 100kHz, sampling channel be 16, and continuous Full wave shape acquisition time was more than 10 days.
In step 509, according to the Full wave shape signal waveform of indicating meter display, judge whether noise signal amplitude is in tolerance interval, it is, then perform step 510, no, then perform step 507;
In step 510, arranging loading velocity, loading regime on pressing machine, coal petrography sample is loaded by start-up loading mechanism;
The tolerance interval of the noise signal amplitude in present embodiment is �� 0.001V.
In step 511, according to the instruction of controller, the self-potential collected, electric charge induction and acoustic emission signal are synchronously sent in real time data storage equipment and show for upper layer application and indicating meter;
Upper layer application can according to the signal data of hard-disc storage, in conjunction with the lithology of sample, the failure mode of sample, the stress-strain(ed) curve of sample, sample is loaded on the self-potential of the whole process of destruction, electric charge induction and acoustic emission signal are analyzed, obtain oil from coal process self-potential, the Changing Pattern of electric charge induction and acoustic emission, and then the mutual relationship obtained between three kinds of signals, obtain coal petrography self-potential and electric charge generation mechanism, for adopting self-potential, the integrated forecasting that carries out of mine motive force disaster is provided laboratory experiment and theoretical foundation by the method that electric charge induction and acoustic emission combine.
In step 512, after coal petrography sample destroys, stop adding mounted mechanism and signals collecting simultaneously.
Although the foregoing describing the specific embodiment of the present invention, but the those skilled in the art in this area are it is to be understood that these are only illustrate, it is possible to these enforcement modes are made various changes or modifications, and does not deviate from principle and the essence of the present invention. The scope of the present invention is only defined by the appended claims.
Claims (1)
1. an oil from coal process Full wave shape simultaneous synthesis monitoring method, adopting oil from coal process Full wave shape simultaneous synthesis Monitoring systems to realize, this system comprises: add mounted mechanism, sensor unit, data processing unit, controller, indicating meter and data storage equipment;
Described sensor unit, comprises 6 self-potential sensors, 6 calibrate AE sensors and 4 charge sensors; The input terminus of described sensor unit connects the electrode probe of 6 self-potential sensors, the acoustic emission probe of 6 calibrate AE sensors, the electric charge probe of 4 charge sensors and an output terminal of controller simultaneously; The electrode probe of described 6 self-potential sensors and the acoustic emission probe of 6 calibrate AE sensors, to avoid crackle as principle, be arranged in coal petrography sample body and may occur on the neighbouring position of crackle; The electric charge probe distribution of described 4 charge sensors is placed in position near coal petrography sample;
The output terminal of described sensor unit connects an input terminus of data processing unit, and an output terminal of data processing unit connects the input terminus of indicating meter, and another output terminal of data processing unit connects the input terminus of data storage equipment;
2nd output terminal of described controller connects another input terminus of data processing unit, and the 3rd output terminal of controller connects another input terminus of indicating meter; The input terminus of described controller carries out man-machine interaction by man-machine interaction interface;
Described data processing unit, comprising: analog to digital converter and data buffer memory device; The input terminus of described analog to digital converter is as the output terminal of a sensor input connection unit of data processing unit; The output terminal of described analog to digital converter connects an input terminus of data buffer memory device; Another input terminus of data buffer memory device is as the 2nd output terminal of another input terminus connection control device of data processing unit, an output terminal of data buffer memory device connects the input terminus of data storage equipment, and another output terminal of data buffer memory device connects the input terminus of indicating meter;
Coal petrography sample is placed in the loading area adding mounted mechanism, described in add mounted mechanism for for being loaded by coal petrography sample, make coal petrography sample produce the mechanism of deformation fracture;
The electrode probe of self-potential sensor directly contacts with the surperficial of corresponding position of rock mass sample respectively with the acoustic emission probe of calibrate AE sensor, and contact surface couplant is coupled;
Described sensor unit is used for according to the corresponding steering order of controller, synchronous self-potential, electric charge induction and the acoustic emission Full wave shape signal gathering coal petrography sample deformation rupture process and producing, and synchronously converts analog electrical signal to and send data processing unit to;
Described controller is for sending corresponding steering order to sensor unit, data processing unit and indicating meter;
Described data processing unit is used for according to the corresponding steering order of controller, receive and the analog electrical signal of amplification sensor unit transmission, and be converted into digital electric signal, and the digital electric signal after conversion be sent to data storage equipment and carry out storing, be also sent to indicating meter simultaneously and show;
Described data storage equipment is for receiving and stores self-potential, electric charge induction and the acoustic emission digital electric signal that analog to digital converter transmits;
Described indicating meter is used for according to the corresponding steering order of controller, and real-time self-potential, electric charge induction and acoustic emission signal Full wave shape are carried out simultaneous display;
Adopt copper net, make enclosed type electric magnetic shield member by coal petrography sample, add mounted mechanism, sensor unit all cover in this electromagnetic shielding component, sensor units synchronization is gathered the interference of self-potential, electric charge induction and acoustic emission signal process by shielding extraneous electromagnetic signal;
It is characterized in that: comprise following concrete steps:
Step 1: coal petrography sample is fixed on the corresponding loading area adding mounted mechanism; The described mounted mechanism that adds is for for being loaded by coal petrography sample, making coal petrography sample produce the mechanism of deformation fracture;
Step 2: arrange the electrode probe of self-potential sensor, the acoustic emission probe of calibrate AE sensor in coal petrography sample body, meanwhile, near coal petrography sample, the electric charge probe of charge sensor is settled in position;
The electrode probe of each self-potential sensor is to arrange in pairs at a distance of 8mm, wherein first to the 3rd, electrode probe is distributed in along, on same article of straight line of sample axis, this straight line setting their places is 0 �� of initial line of axis of coal petrography sample (1), electrode probe is arranged in the mid point of 0 �� of initial line of axis by the 2nd, the distance of electrode probe is 30mm by electrode probe, the 3rd by electrode probe and first by the 2nd, the distance of first pair of electrode probe and cylindrical coal petrography sample upper surface is 20mm, and the distance of electrode probe and cylindrical coal petrography sample (1) lower surface is also 20mm by the 3rd, electrode probe is arranged on the intersection point of 90 �� of axial line of cylindrical coal petrography sample, 270 �� of axial line and its intermediate cross-section line by the 4th by electrode probe, the 5th, the 6th is arranged in 180 �� of axial line to electrode probe, distance 25mm place, coal petrography sample upper surface, first acoustic emission probe, the rising tone launch Probe arrangement on 45 �� of axial straight lines of coal petrography sample, wherein the first acoustic emission probe is positioned at apart from 20mm place, cylindrical coal petrography sample upper surface, and the rising tone is launched probe and is positioned at apart from 20mm place, cylindrical coal petrography sample lower surface, 3rd acoustic emission probe, the falling tone launch Probe arrangement on 135 �� of axial straight lines of coal petrography sample, and wherein the 3rd acoustic emission probe is apart from 20mm place, cylindrical coal petrography sample upper surface, and the falling tone launches 20mm place, probe distance cylindrical coal petrography sample lower surface, 5th acoustic emission probe, the 6th acoustic emission probe are arranged in 315 �� of axial line, 225 �� of axial line, and the 5th acoustic emission probe is positioned at distance 20mm place, coal petrography sample upper surface, the 6th acoustic emission probe distance 20mm place, coal petrography sample lower surface, first electric charge is popped one's head in the 4th electric charge Probe arrangement near the cylindrical coal petrography sample apart from cylindrical coal petrography specimen surface 10mm, wherein the first electric charge probe, 2nd electric charge probe is arranged in 45 �� of axial line of cylindrical coal petrography sample, near the position that 135 �� of axial line are crossing with its intermediate cross-section, 3rd electric charge Probe arrangement is in 225 �� of axial line of cylindrical coal petrography sample, and near the position of distance coal petrography sample upper surface 25mm, 4th electric charge Probe arrangement is in 315 �� of axial line of cylindrical coal petrography sample, and near the position of distance coal petrography sample lower surface 25mm,
Step 3: on the controller acquisition parameter is arranged or adjust, described acquisition parameter comprises: sample frequency, sampling channel, data preserve position and data storage file name;
Step 4: start up system, starts the self-potential of pre-acquired coal petrography sample, electric charge induction and acoustic emission Full wave shape signal, and carries out display in real time over the display but do not preserve;
Step 5: according to the Full wave shape signal waveform of indicating meter display, judge whether noise signal amplitude is in tolerance interval, be, then perform step 6, no, then perform step 3;
Step 6: arranging loading velocity, loading regime on mounted mechanism adding, coal petrography sample is loaded by start-up loading mechanism;
Step 7: according to the corresponding steering order of controller, the self-potential collected, electric charge induction and acoustic emission signal data are synchronously sent in real time data storage equipment for upper layer application, simultaneously be also synchronously sent to indicating meter carry out signal Full wave shape display;
Step 8: after coal petrography sample destroys, stops adding mounted mechanism and signals collecting simultaneously.
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