CN111830240A - Loading control and data synchronous monitoring device of true triaxial multi-field coupling and power disturbance platform - Google Patents
Loading control and data synchronous monitoring device of true triaxial multi-field coupling and power disturbance platform Download PDFInfo
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Abstract
The invention discloses a loading control and data synchronous monitoring device of a true triaxial multi-field coupling and power disturbance platform, which comprises a loading control system and a data synchronous monitoring device; the loading control system consists of an industrial personal computer, a stress loading control mechanism, a seepage loading control mechanism, a temperature loading control mechanism and a power disturbance loading control mechanism; the data synchronous monitoring device comprises a synchronous trigger, a monitoring data acquisition mechanism, a data storage and analysis workstation and a monitoring sensor. The invention realizes the time synchronization of data acquisition by triggering the monitoring data acquisition mechanism through the synchronous trigger; each mechanism in the loading control system also transmits the data acquired by the mechanisms to a monitoring data acquisition mechanism, and the synchronous data coupling matching of the loading control system and the data synchronous monitoring device is realized by the synchronous parallel acquisition mode of the loading control system and the monitoring sensor; and the synchronous and accurate verification of the data is realized by a double-path repeated acquisition mode.
Description
Technical Field
The invention relates to the technical field of deep rock testing, in particular to a loading control and data synchronous monitoring device of a true triaxial multi-field coupling and dynamic disturbance platform.
Background
With the increase of the demand of mineral resources and the continuous consumption of shallow resources, the future mineral resource development of China will enter the deep mineral deposit in the range of the second depth space (1000-2000 m) comprehensively, and the deep mining of mines will become a normal state. Under the action of disturbance and induction of different engineering activities, the accumulation and release of rock mass energy under the action of multi-field coupling of a deep stress field, a temperature field, a seepage pressure field and the like are the root cause of frequent deep mining disasters. Various disasters in the deep part, such as dynamic disturbance energy release of rocks under non-uniform high initial stress, dynamic evolution of mining rock fractures, hydraulic seepage mutation and dynamic and static mechanical destruction characteristics of the rocks under a temperature-pressure coupling state, complex evolution process and numerous influencing factors.
Under the action of dynamic disturbance, the evolution process of a disaster phenomenon of a rock mass under a deep multi-field coupling environment is often characterized by rapidness and sudden change. The existing deep multi-field physical test system is often used for carrying out static or quasi-static test research, and the control and monitoring system of the system is used for capturing parameters of the transient catastrophe process of a deep rock mass and is difficult to meet the requirement of high-precision quantitative analysis. For example, the existing data monitoring system of the true triaxial loading platform mostly adopts mutually independent acquisition instruments for stress, strain, temperature, pressure, flow, acoustics, image and other data in the test process, and high-precision synchronous matching in time is difficult to realize among the data, thereby seriously influencing the comprehensive analysis of the test phenomenon.
Therefore, in order to satisfy the simulation of the multi-field coupling environment and the engineering dynamic disturbance of the true triaxial platform for multi-field coupling and dynamic disturbance of the rock to the occurrence of deep rocks and capture the evolution process of the disaster phenomenon with high precision, multi-channel synchronous monitoring, high-speed acquisition and rapid analysis of parameters such as stress, strain, temperature, pressure, flow, acoustics, images and the like involved in the test process must be implemented, and the quantitative analysis of the test result is realized by using an accurate multi-hand synchronous monitoring technology.
Disclosure of Invention
The invention provides a loading control and data synchronization monitoring device of a true triaxial multi-field coupling and power disturbance platform, which aims to solve the problem that the existing data detection system is difficult to realize high-precision synchronous matching of each parameter acquisition in time.
A loading control and data synchronous monitoring device of a true triaxial multi-field coupling and dynamic disturbance platform comprises a loading control system and a data synchronous monitoring device;
the loading control system comprises an industrial personal computer, and a stress loading control mechanism, a seepage loading control mechanism, a temperature loading control mechanism and a power disturbance loading control mechanism which are all connected with the industrial personal computer;
the data synchronous monitoring device comprises a synchronous trigger, a monitoring data acquisition mechanism, a data storage and analysis workstation and a monitoring sensor; the monitoring sensor, the monitoring data acquisition mechanism and the data storage and analysis workstation are sequentially connected, and the industrial personal computer and the monitoring data acquisition mechanism are both connected with the synchronous trigger;
the stress loading control mechanism, the seepage loading control mechanism, the temperature loading control mechanism and the dynamic disturbance loading control mechanism 7 are all connected with the monitoring data acquisition mechanism, and the data storage and analysis workstation is connected with the industrial personal computer.
Furthermore, the monitoring sensor comprises a pressure box arranged in the tested test piece, a static strain gauge, a second dynamic strain gauge, an acoustic emission piezoelectric sensor and a digital image sensor which are arranged on the outer surface of the tested test piece, a first pressure sensor, a first mass flow sensor and a first temperature measuring sensor which are arranged at the seepage input end of the tested test piece, and a second pressure sensor, a second mass flow sensor and a second temperature measuring sensor which are arranged at the seepage output end of the tested test piece;
the pressure box, the static strain gauge, the second dynamic strain gauge, the acoustic emission piezoelectric sensor, the digital image sensor, the first pressure sensor, the first mass flow sensor, the first temperature measurement sensor, the second pressure sensor, the second mass flow sensor and the second temperature measurement sensor are also connected with the monitoring data acquisition mechanism.
Furthermore, the monitoring data acquisition mechanism comprises a multi-channel analog signal high-speed acquisition device, a dynamic and static strain gauge, a super-dynamic strain gauge, an acoustic emission acquisition instrument and a high-speed digital image acquisition instrument;
the data output ends of the multi-channel analog signal high-speed collector, the dynamic and static strain gauges, the ultra-dynamic strain gauge, the acoustic emission collector and the high-speed digital image collector are connected with the data storage and analysis workstation;
the signal input end of the multi-channel analog signal high-speed collector is connected with the pressure box, the first pressure sensor, the first mass flow sensor, the first temperature measuring sensor, the second pressure sensor, the second mass flow sensor, the second temperature measuring sensor, the stress loading control mechanism, the seepage loading control mechanism and the temperature loading control mechanism; the signal input end of the ultra-dynamic strain gauge is connected with the dynamic disturbance loading control mechanism and the second dynamic strain gauge; the signal input end of the dynamic and static strain gauge is connected with the static strain gauge; the signal input end of the acoustic emission collector is connected with the acoustic emission piezoelectric sensor; the signal input end of the high-speed digital image acquisition instrument is connected with the digital image sensor;
and the trigger instruction receiving end of the synchronous trigger is connected with the industrial personal computer, and the trigger signal output end of the synchronous trigger is connected with the trigger signal receiving ends of the multi-channel analog signal high-speed collector, the dynamic and static strain gauge, the ultra-dynamic strain gauge, the acoustic emission collector and the high-speed digital image collector in parallel.
Further, the ultra-dynamic strain gauge is further provided with a waveform analog electric signal output end 83, and the waveform analog signal output end is connected with an oscilloscope.
Furthermore, the trigger signal receiving end of the high-speed digital image acquisition instrument is also used for being connected with the waveform analog electric signal output end of the ultra-dynamic strain gauge.
Furthermore, the stress loading control mechanism comprises a multi-channel stress loading controller, and a plurality of groups of static hydraulic actuating mechanisms, a plurality of groups of dynamic hydraulic actuating mechanisms, static load sensors, static displacement sensors, static strain sensors, dynamic load sensors, dynamic displacement sensors and dynamic strain sensors which are all connected with the multi-channel stress loading controller;
the multi-channel stress loading controller is further connected with the industrial personal computer, and the static load sensor static displacement sensor, the static strain sensor, the dynamic load sensor, the dynamic displacement sensor and the dynamic strain sensor are further connected with the multi-channel analog signal high-speed collector.
Further, the static load sensor is also connected with the acoustic emission collector.
The static load sensor can synchronously supply static load signals to the multi-channel analog signal high-speed collector and the acoustic emission collector to perform data collection. By taking the static load as a link, various data collected by the multi-channel analog signal high-speed collector and acoustic emission data collected by the acoustic emission collector can be analyzed and checked without time difference in data analysis, and the synchronization precision of the data analysis is further improved.
Further, the seepage loading control mechanism comprises a seepage loading controller, a seepage loading execution mechanism, a seepage pressure sensor and a seepage flow sensor which are all connected with the seepage loading controller 37;
the seepage loading controller is also connected with the industrial personal computer, and the seepage pressure sensor and the seepage flow sensor are also connected with the multi-channel analog signal high-speed collector.
Furthermore, the temperature loading control mechanism comprises a temperature loading controller, a temperature loading execution mechanism and a temperature measuring sensor, wherein the temperature loading execution mechanism and the temperature measuring sensor are connected with the temperature loading controller;
the temperature loading controller is also connected with the industrial personal computer, and the temperature measuring sensor is also connected with the multi-channel analog signal high-speed collector.
Further, the power disturbance loading control mechanism comprises a power disturbance loading controller, a pneumatic power disturbance loading actuating mechanism and an air pressure sensor, wherein the pneumatic power disturbance loading actuating mechanism and the air pressure sensor are connected with the power disturbance loading controller;
the pneumatic power disturbance loading actuating mechanism is also provided with a first dynamic strain gauge for monitoring disturbance loading waveforms; the power disturbance loading controller is further connected with the industrial personal computer, and the first dynamic strain gauge is further connected with the ultra-dynamic strain gauge.
Advantageous effects
The invention provides a loading control and data synchronous monitoring device of a true triaxial multi-field coupling and power disturbance platform, which has the following advantages:
1. the synchronous trigger is introduced into the data synchronous monitoring device, before or at the beginning of a test, the synchronous trigger is controlled to apply a synchronous trigger signal through an industrial personal computer terminal of a loading control system, and then all data acquisition devices of the data synchronous monitoring device execute a data acquisition instruction at the same time, so that data such as stress, strain, temperature, pressure, flow, acoustics, digital images and the like are synchronously acquired at the same time point, and the one-to-one correspondence of each data in time is realized;
2. the invention is characterized in that at least two groups of signal output ends are arranged on the sensors related to the stress loading control mechanism, the seepage loading control mechanism, the temperature loading control mechanism and the dynamic disturbance loading control mechanism of the loading control system, and each sensor synchronously outputs the loading state parameters to the data synchronous monitoring device for joint acquisition with the test piece state parameters while feeding back signals to the loading control system, thereby effectively overcoming the defect that various types of data of the control system and the monitoring system of the existing true triaxial loading platform are difficult to be synchronously coupled.
3. The data sampling frequency of the invention can match the requirement of the microsecond-level destruction process, and can realize the capture of microsecond-level dynamic destruction process phenomena.
Drawings
Fig. 1 is a schematic structural diagram of a load control and data synchronization monitoring device of a true triaxial multi-field coupling and dynamic disturbance platform according to an embodiment of the present invention.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, a loading control and data synchronization monitoring device for a rock multi-field coupling and dynamic disturbance true triaxial platform is provided, which comprises a loading control system 1 and a data synchronization monitoring device 2;
the loading control system 1 comprises an industrial personal computer 3, a stress loading control mechanism 4, a seepage loading control mechanism 5, a temperature loading control mechanism 6 and a dynamic disturbance loading control mechanism 7;
the data synchronous monitoring device 2 comprises a synchronous trigger 8, a monitoring data acquisition mechanism 9, a data storage and analysis workstation 10 and a monitoring sensor 11.
Referring to fig. 1, the stress loading control mechanism 4 includes a multi-channel stress loading controller 12, multiple sets of static hydraulic actuators 13, multiple sets of dynamic hydraulic actuators 14, a static load sensor 15, a static displacement sensor 16, a static strain sensor 17, a dynamic load sensor 18, a dynamic displacement sensor 19, and a dynamic strain sensor 20; the static hydraulic actuators 13 are matched with the static load sensor 15, the static displacement sensor 16 and the static strain sensor 17 for use, and the dynamic hydraulic actuators 14 are matched with the dynamic load sensor 18, the dynamic displacement sensor 19 and the dynamic strain sensor 20 for use.
The static load sensor 15 is provided with a first static load signal output end 21, a second static load signal output end 22 and a third static load signal output end 23 which are output in parallel; the static displacement sensor 16 is provided with a first static displacement signal output end 24 and a second static displacement signal output end 25 which are output in parallel; the static strain sensor 17 is provided with a first static strain signal output end 26 and a second static strain signal output end 27 which are output in parallel; the dynamic load sensor 18 is provided with a first dynamic load signal output end 28 and a second dynamic load signal output end 29 which are output in parallel; the dynamic displacement sensor 19 is provided with a first dynamic displacement signal output end 30 and a second dynamic displacement signal output end 31 which are output in parallel; the dynamic strain sensor 20 is provided with a first dynamic strain signal output end 32 and a second dynamic strain signal output end 33 which are output in parallel; the signal output end 34 of the multi-channel stress loading controller 12 is electrically connected with each group of static hydraulic actuating mechanisms 13 and each group of dynamic hydraulic actuating mechanisms 14; the multi-channel stress loading controller 12 is electrically connected with the industrial personal computer 3 through an instruction receiving end 35; the first static load signal output end 21, the first static displacement signal output end 24, the first static strain signal output end 26, the first dynamic load signal output end 28, the first dynamic displacement signal output end 30 and the first dynamic strain signal output end 32 are electrically connected with channels corresponding to the signal feedback end 36 of the multi-channel stress loading controller 12.
The seepage loading control mechanism 5 comprises a seepage loading controller 37, a seepage loading actuator 38, a seepage pressure sensor 39 and a seepage flow sensor 40; the seepage pressure sensor 39 is provided with a first pressure signal output end 41 and a second pressure signal output end 42 which are output in parallel; the seepage flow sensor 40 is provided with a first flow signal output end 43 and a second flow signal output end 44 which are output in parallel; the seepage load controller 37 instructs the receiving end 45 to electrically connect with the industrial personal computer 3, the seepage load controller 37 signal output end 46 is electrically connected with the seepage load executing mechanism 38, and the seepage load controller 37 signal feedback end 47 is electrically connected with the first pressure signal output end 41 and the first flow signal output end 43.
The temperature loading control mechanism 6 comprises a temperature loading controller 48, a temperature loading execution mechanism 49 and a temperature measuring sensor 50; the temperature sensor 50 is provided with a first temperature signal output end 51 and a second temperature signal output end 52 which are output in parallel; the temperature loading controller 48 is electrically connected with the industrial personal computer 3 through an instruction receiving end 53, the temperature loading controller 48 is electrically connected with the temperature loading executing mechanism 49 through a signal output end 54, and the temperature loading controller 48 is electrically connected with the first temperature signal output end 51 through a signal feedback end 55.
The dynamic disturbance loading control mechanism 7 comprises a dynamic disturbance loading controller 56, a pneumatic dynamic disturbance loading actuating mechanism 57 and a pneumatic pressure sensor 58; the instruction receiving end 59 of the power disturbance loading controller 56 is electrically connected with the industrial personal computer 3, the signal output end 60 of the power disturbance loading controller 56 is electrically connected with the pneumatic power disturbance loading executing mechanism 57, and the signal feedback end 61 of the power disturbance loading controller 56 is electrically connected with the output end of the air pressure sensor 58; the pneumatic power disturbance loading actuator 57 is further provided with a first dynamic strain gauge 62 for monitoring a disturbance loading waveform.
Referring to fig. 1, the monitoring sensor 11 includes a pressure box 64 disposed in a tested test piece 63, a static strain gauge 65, a second dynamic strain gauge 66, an acoustic emission piezoelectric sensor 67, a digital image sensor 68 disposed on an outer surface of the tested test piece 63, a first pressure sensor 69, a first mass flow sensor 70, and a first temperature sensor 71 disposed on a seepage input end of the tested test piece 63, and a second pressure sensor 72, a second mass flow sensor 73, and a second temperature sensor 74 disposed on a seepage output end of the tested test piece 63.
The monitoring data acquisition mechanism 9 comprises a multi-channel analog signal high-speed acquisition device 75, a dynamic and static strain gauge 76, a super-dynamic strain gauge 77, an acoustic emission acquisition device 78 and a high-speed digital image acquisition device 79; the multi-channel analog signal high-speed collector 75, the dynamic and static strain gauge 76, the ultra-dynamic strain gauge 77, the acoustic emission collector 78 and the high-speed digital image collector 79 are all provided with a signal input end 80, a trigger signal receiving end 81 and a data output end 82; the ultra-dynamic strain gauge 77 is further provided with a waveform analog electrical signal output end 83, and the waveform analog signal output end 83 is further electrically connected with an oscilloscope 84;
the synchronous trigger 8 is provided with a trigger instruction receiving end 85 and a trigger signal output end 86, the trigger instruction receiving end 85 is electrically connected with the industrial personal computer 3, and the trigger signal output end 86 is electrically connected in parallel with a trigger signal receiving end 81 of the multi-channel analog signal high-speed collector 75, the dynamic and static strain gauge 76, the ultra-dynamic strain gauge 77, the acoustic emission collector 78 and the high-speed digital image collector 79; the trigger signal receiving terminal 81 of the high-speed digital image acquisition instrument 79 can also be electrically connected with the waveform analog electrical signal output terminal 83 of the ultra-dynamic strain gauge 77.
The signal input end 80 of the multichannel analog signal high-speed collector 75 is electrically connected with the pressure box 64, the first pressure sensor 69, the first mass flow sensor 70, the first temperature sensor 71, the second pressure sensor 72, the second mass flow sensor 73 and the second temperature sensor 74; the signal input end 80 of the multi-channel analog signal high-speed collector 75 is further electrically connected to the second static load signal output end 22, the second static displacement signal output end 25, the second static strain signal output end 27, the second dynamic load signal output end 29, the second dynamic displacement signal output end 31, the second dynamic strain signal output end 33, the second pressure signal output end 42, the second flow signal output end 44 and the second temperature signal output end 52; the signal input end 80 of the ultra-dynamic strain gauge 77 is electrically connected with the first dynamic strain gauge 62 and the second dynamic strain gauge 66; the signal input end 80 of the dynamic and static strain gauge 76 is electrically connected with the static strain gauge 65; the signal input end 80 of the acoustic emission collector 78 is electrically connected with the third static load signal output end 23 and the acoustic emission piezoelectric sensor 67; the signal input end 80 of the high-speed digital image acquisition instrument 79 is electrically connected with the digital image sensor 68;
the signal input end of the data storage and analysis workstation 10 is electrically connected with the data communication end 82 of the multi-channel analog signal high-speed collector 75, the dynamic and static strain gauge 76, the ultra-dynamic strain gauge 77, the acoustic emission collector 78 and the high-speed digital image collector 79; the data storage and analysis workstation 10 is further provided with a feedback signal output end 87 electrically connected with the industrial personal computer 3.
In order to further understand the technical scheme of the invention, the test application process of the loading control and data synchronous monitoring device of the rock multi-field coupling and dynamic disturbance true triaxial platform is described below by combining the examples.
Example 1, monitoring of stress-temperature-seepage-strong dynamic disturbance coupling test data of rock:
the method comprises the following steps: and loading the square tested test piece 63 into a pressure chamber of a rock multi-field coupling and power disturbance true triaxial platform, and completing the connection of each pipeline and the sensor with the test piece.
Step two: setting a three-way stress load, a stress path and a loading mode of the stress loading control mechanism 4 through an operation interface of the industrial personal computer 3; then, the industrial personal computer 3 applies a loading instruction to control the multichannel stress loading controller 12 to output a loading signal, and each static hydraulic actuating mechanism 13 executes a static stress loading action; furthermore, the multi-channel stress loading controller 12 performs servo loading control according to feedback signals of the first static load signal output end 21 of the static load sensor 15, the first static displacement signal output end 24 of the static displacement sensor 16 and the first static strain signal output end 26 of the static strain sensor 17, so that the tested specimen 63 completes static stress loading and is kept.
Step three: the temperature load and the heating rate of the temperature loading control mechanism 6 are set through an operation interface of the industrial personal computer 3; then, the industrial personal computer 3 applies a heating instruction to control the temperature loading controller 48 to output a heating signal, and the temperature loading executing mechanism 49 executes a temperature loading action on the tested test piece 63; furthermore, the temperature loading controller 48 performs servo heating control according to the signal feedback of the first temperature signal output end 51 of the temperature sensors 50 in the test piece and on the loading plate, so that the test piece 63 to be tested reaches the required temperature field condition and is maintained.
Step four: setting seepage pressure and flow load of the seepage loading control mechanism 5 through an operation interface of the industrial personal computer 3; then, the industrial personal computer 3 applies a liquid injection instruction to control the seepage loading controller 37 to output a liquid injection signal, and the seepage loading executing mechanism 38 executes a seepage liquid injection loading action on the tested test piece 63; the seepage load controller 37 performs servo injection control based on the signal feedback from the first pressure signal output terminal 41 and the first flow rate signal output terminal 43 of the seepage pressure sensor 39 and the seepage flow rate sensor 40, and holds the signals.
Step five: connecting a trigger signal receiving end 81 of the high-speed digital image acquisition instrument 79 with a waveform analog electric signal output end of the ultra-dynamic strain instrument 77, disconnecting the trigger signal from the synchronous trigger 8, and then starting the data synchronous monitoring device 2 to enter a state to be triggered; further, a trigger instruction is applied to the synchronous trigger 8 through an operation interface of the industrial personal computer 3, a synchronous trigger signal is applied to the multichannel analog signal high-speed collector 75, the dynamic and static strain gauge 76, the ultra-dynamic strain gauge 77 and the acoustic emission collector 78 by a trigger signal output end of the synchronous trigger 8, and each monitoring data collecting mechanism 9 synchronously executes high-speed data collecting actions; the multi-channel analog signal high-speed collector 75 synchronously collects initial analog voltage signals of the pressure box 64, the first pressure sensor 69, the first mass flow sensor 70, the first temperature sensor 71, the second pressure sensor 72, the second mass flow sensor 73 and the second temperature sensor 74, and synchronously collects initial analog voltage signals of the second static load signal output end 22, the second static displacement signal output end 25, the second static strain signal output end 27, the second dynamic load signal output end 29, the second dynamic displacement signal output end 31, the second dynamic strain signal output end 33, the second pressure signal output end 42, the second flow signal output end 44 and the second temperature signal output end 52; the dynamic and static strain gauge 76 collects strain signals of the static strain gauge 65, the ultra-dynamic strain gauge 77 collects dynamic strain signals of the first dynamic strain gauge 62 and the second dynamic strain gauge 66, the acoustic emission collector 78 synchronously collects data signals of a third static load signal output end 23 and an acoustic emission piezoelectric sensor 67, and the high-speed digital image collector 79 is in a state of waiting for the ultra-dynamic strain gauge 77 to trigger the high-speed digital image collector; at this time, the data storage and analysis workstation 10 stores various data signals output by the monitoring data acquisition mechanism 9, and calculates the initial permeability of the test piece 63 to be tested based on the data acquired by the first pressure sensor 69, the first mass flow sensor 70, the second pressure sensor 72, and the second mass flow sensor 73.
Step six: setting the disturbance generation air pressure of the power disturbance loading control mechanism 7 through an operation interface of the industrial personal computer 3; then, the industrial personal computer 3 applies a gas injection instruction to control the power disturbance loading controller 56 to output a gas injection signal, and the pneumatic power disturbance loading executing mechanism 57 performs gas injection; further, the power disturbance loading controller 56 performs servo inflation control according to the signal feedback of the air pressure sensor 58; after the inflation action is finished, the dynamic disturbance loading controller 56 controls the pneumatic dynamic disturbance loading executing mechanism 57 to quickly release pressure and apply dynamic disturbance, and the dynamic disturbance acts on the tested test piece 63.
Step seven: synchronously, the first dynamic strain gauge 62 receives the disturbance signal and then is collected by the ultra-dynamic strain gauge 77, the waveform analog electric signal output end of the ultra-dynamic strain gauge 77 synchronously gives a trigger signal to the high-speed digital image collecting instrument 79, and the high-speed digital image collecting instrument 79 collects the image data of the digital image sensor 68 arranged in the loading plate; the data storage and analysis workstation 10 continues to store various data signals output by the monitoring data acquisition mechanism 9 until the test is finished.
Example 2, monitoring of stress-temperature-seepage-low frequency dynamic disturbance coupling test data of rock:
the method comprises the following steps: the same procedure as in the first step of example 1 was followed.
Step two: the procedure was carried out in the same manner as in step two of example 1.
Step three: the same procedure as in step three of example 1 was repeated.
Step four: the same manner as in step four of example 1 was performed.
Step five: connecting a trigger signal receiving end 81 of the high-speed digital image acquisition instrument 79 with the synchronous trigger 8, disconnecting the trigger signal receiving end from a waveform analog electric signal output end 83 of the ultra-dynamic strain instrument 77, and adjusting the acquisition frequency of the high-speed digital image acquisition instrument 79; further, a trigger instruction is applied to the synchronous trigger 8 through an operation interface of the industrial personal computer 3, a synchronous trigger signal output end of the synchronous trigger 8 applies a synchronous trigger signal to the multi-channel analog signal high-speed collector 75, the dynamic and static strain gauge 76, the ultra-dynamic strain gauge 77, the acoustic emission collector 78 and the high-speed digital image collector 79, and each monitoring data collection mechanism 9 synchronously executes high-speed data collection action; the multi-channel analog signal high-speed collector 75 synchronously collects initial analog voltage signals of the pressure box 64, the first pressure sensor 69, the first mass flow sensor 70, the first temperature sensor 71, the second pressure sensor 72, the second mass flow sensor 73 and the second temperature sensor 74, and synchronously collects initial analog voltage signals of the second static load signal output end 22, the second static displacement signal output end 25, the second static strain signal output end 27, the second dynamic load signal output end 29, the second dynamic displacement signal output end 31, the second dynamic strain signal output end 33, the second pressure signal output end 42, the second flow signal output end 44 and the second temperature signal output end 52; the dynamic and static strain gauge 76 collects strain signals of the static strain gauge 65, the ultra-dynamic strain gauge 77 collects dynamic strain signals of the second dynamic strain gauge 66, the acoustic emission collector 78 synchronously collects data signals of the third static load signal output end 23 and the acoustic emission piezoelectric sensor 67, and the high-speed digital image collector 79 collects digital image signals; at this time, the data storage and analysis workstation 10 stores various data signals output by the monitoring data acquisition mechanism 9, and calculates the initial permeability of the test piece 63 to be tested based on the data acquired by the first pressure sensor 69, the first mass flow sensor 70, the second pressure sensor 72, and the second mass flow sensor 73.
Step six: setting the loading sequence, loading waveform, loading frequency and loading time of the dynamic actuator of the stress loading control mechanism 4 through an industrial personal computer 3 control interface; then, the industrial personal computer 3 applies a loading instruction to control the multichannel stress loading controller 12 to output a loading signal, and each dynamic hydraulic executing mechanism 14 executes a dynamic stress loading action; furthermore, the multi-channel stress loading controller 12 performs servo loading control according to feedback signals of the first dynamic load signal output end 28 of the dynamic load sensor 18, the first dynamic displacement signal output end 30 of the dynamic displacement sensor 19 and the first dynamic strain signal output end 32 of the dynamic strain sensor 20, so that the tested test piece 63 is subjected to dynamic low-frequency disturbance loading and is maintained.
Step seven: and synchronously, the data storage and analysis workstation 10 continues to store various data signals output by the monitoring data acquisition mechanism 9 until the test is finished.
The invention provides a loading control and data synchronous monitoring device of a true triaxial multi-field coupling and power disturbance platform, which has the following advantages:
1. the synchronous trigger is introduced into the data synchronous monitoring device, before or at the beginning of a test, the synchronous trigger is controlled to apply a synchronous trigger signal through an industrial personal computer terminal loaded with a control system, so that all data acquisition devices of the data synchronous monitoring device, such as a multi-channel analog signal high-speed acquisition device, a dynamic and static strain gauge, a super dynamic strain gauge, an acoustic emission acquisition device, a high-speed digital image acquisition device and the like, execute a data acquisition instruction at the same time, and thus, data such as stress, strain, temperature, pressure, flow, acoustics, digital images and the like are synchronously acquired at the same time point, and the one-to-one correspondence of each data in time is realized;
2. the sensors related to the stress loading control mechanism, the seepage loading control mechanism, the temperature loading control mechanism and the dynamic disturbance loading control mechanism of the loading control system are all provided with at least two groups of signal output ends which are connected in parallel, and the sensors synchronously output loading state parameters to the synchronous monitoring device for joint acquisition with the test piece state parameters while feeding back signals to the loading control system. Therefore, the defect that various types of data of a control system and a monitoring system of the existing true triaxial loading platform are difficult to be synchronously coupled is effectively overcome.
3. The static load sensor is provided with a third static load signal output end, and can synchronously supply the static load signal to the multi-channel analog signal high-speed collector and the acoustic emission collector to perform data collection. By taking the static load as a link, various data collected by the multi-channel analog signal high-speed collector and acoustic emission data collected by the acoustic emission collector can be analyzed and checked without time difference in data analysis, and the synchronization precision of the data analysis is further improved.
4. The data sampling frequency of the invention can match the requirement of the microsecond-level destruction process, and can realize the capture of microsecond-level dynamic destruction process phenomena.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A loading control and data synchronous monitoring device of a true triaxial multi-field coupling and dynamic disturbance platform is characterized by comprising a loading control system (1) and a data synchronous monitoring device (2);
the loading control system (1) comprises an industrial personal computer (3), and a stress loading control mechanism (4), a seepage loading control mechanism (5), a temperature loading control mechanism (6) and a power disturbance loading control mechanism (7) which are all connected with the industrial personal computer (3);
the data synchronous monitoring device (2) comprises a synchronous trigger (8), a monitoring data acquisition mechanism (9), a data storage and analysis workstation (10) and a monitoring sensor (11); the monitoring sensor (11), the monitoring data acquisition mechanism (9) and the data storage and analysis workstation (10) are sequentially connected, and the industrial personal computer (3) and the monitoring data acquisition mechanism (9) are both connected with the synchronous trigger (8);
the stress loading control mechanism (4), the seepage loading control mechanism (5), the temperature loading control mechanism (6) and the dynamic disturbance loading control mechanism (7) are all connected with the monitoring data acquisition mechanism (9), and the data storage and analysis workstation (10) is connected with the industrial personal computer (3).
2. The loading control and data synchronous monitoring device of the true triaxial multi-field coupling and power disturbance platform according to claim 1, wherein the monitoring sensor (11) comprises a pressure box (64) arranged in a tested test piece (63), a static strain gauge (65), a second dynamic strain gauge (66), an acoustic emission piezoelectric sensor (67), a digital image sensor (68) arranged on the outer surface of the tested test piece (63), a first pressure sensor (69), a first mass flow sensor (70) and a first temperature sensor (71) arranged on a seepage input end of the tested test piece (63), a second pressure sensor (72), a second mass flow sensor (73) and a second temperature sensor (74) arranged on a seepage output end of the tested test piece (63);
the pressure box (64), the static strain gauge (65), the second dynamic strain gauge (66), the acoustic emission piezoelectric sensor (67), the digital image sensor (68), the first pressure sensor (69), the first mass flow sensor (70), the first temperature measurement sensor (71), the second pressure sensor (72), the second mass flow sensor (73) and the second temperature measurement sensor (74) are connected with the monitoring data acquisition mechanism (9).
3. The loading control and data synchronous monitoring device of the true triaxial multi-field coupling and dynamic disturbance platform according to claim 2, wherein the monitoring data acquisition mechanism (9) comprises a multi-channel analog signal high-speed acquisition device (75), a dynamic and static strain gauge (76), an ultra-dynamic strain gauge (77), an acoustic emission acquisition device (78) and a high-speed digital image acquisition device (79);
the data output ends of the multi-channel analog signal high-speed collector (75), the dynamic and static strain gauges (76), the ultra-dynamic strain gauge (77), the acoustic emission collector (78) and the high-speed digital image collector (79) are connected with the data storage and analysis workstation (10);
the signal input end of the multi-channel analog signal high-speed collector (75) is connected with the pressure box (64), the first pressure sensor (69), the first mass flow sensor (70), the first temperature measurement sensor (71), the second pressure sensor (72), the second mass flow sensor (73), the second temperature measurement sensor (74), the stress loading control mechanism (4), the seepage loading control mechanism (5) and the temperature loading control mechanism (6); the signal input end of the ultra-dynamic strain gauge (77) is connected with the dynamic disturbance loading control mechanism (7) and the second dynamic strain gauge (66); the signal input end of the dynamic and static strain gauge (76) is connected with the static strain gauge (65); the signal input end of the acoustic emission collector (78) is connected with the acoustic emission piezoelectric sensor (67); the signal input end of the high-speed digital image acquisition instrument (79) is connected with the digital image sensor (68);
the trigger instruction receiving end of the synchronous trigger (8) is connected with the industrial personal computer (3), and the trigger signal output end (86) of the synchronous trigger (8) is connected with the trigger signal receiving ends of the multi-channel analog signal high-speed collector (75), the dynamic and static strain gauge (76), the ultra-dynamic strain gauge (77), the acoustic emission collector (78) and the high-speed digital image collector (79) in parallel.
4. The loading control and data synchronization monitoring device of the true triaxial multi-field coupling and power disturbance platform according to claim 3, wherein the ultra-dynamic strain gauge (77) is further provided with a waveform analog electrical signal output end (83), and the waveform analog signal output end (83) is connected with an oscilloscope (84).
5. The loading control and data synchronization monitoring device of the true triaxial multi-field coupling and dynamic disturbance platform according to claim 4, wherein the trigger signal receiving end of the high-speed digital image acquisition instrument (79) is further configured to be connected to the waveform analog electrical signal output end (83) of the ultra-dynamic strain gauge (77).
6. The loading control and data synchronization monitoring device of the true triaxial multi-field coupling and dynamic disturbance platform according to any one of claims 3 to 5, wherein the stress loading control mechanism (4) comprises a multi-channel stress loading controller (12), and a plurality of sets of static hydraulic actuators (13), a plurality of sets of dynamic hydraulic actuators (14), a static load sensor (15), a static displacement sensor (16), a static strain sensor (17), a dynamic load sensor (18), a dynamic displacement sensor (19) and a dynamic strain sensor (20) which are all connected with the multi-channel stress loading controller (12);
the multichannel stress loading controller (12) is further connected with the industrial personal computer (3), and the static load sensor (15), the static displacement sensor (16), the static strain sensor (17), the dynamic load sensor (18), the dynamic displacement sensor (19) and the dynamic strain sensor (20) are further connected with the multichannel analog signal high-speed collector (75).
7. The device for load control and data synchronization monitoring of a true triaxial multi-field coupling and dynamic perturbation platform according to claim 6, wherein the static load sensor (15) is further connected with the acoustic emission collector (78).
8. The loading control and data synchronization monitoring device of the true triaxial multi-field coupling and dynamic disturbance platform according to any one of claims 3 to 5, wherein the seepage loading control mechanism (5) comprises a seepage loading controller (37), and a seepage loading actuator (38), a seepage pressure sensor (39) and a seepage flow sensor (40) which are all connected with the seepage loading controller (37);
the seepage load controller (37) is also connected with the industrial personal computer (3), and the seepage pressure sensor (39) and the seepage flow sensor (40) are also connected with the multi-channel analog signal high-speed collector (75).
9. The loading control and data synchronization monitoring device of the true triaxial multi-field coupling and dynamic disturbance platform according to any one of claims 3 to 5, wherein the temperature loading control mechanism (6) comprises a temperature loading controller (48), and a temperature loading actuator (49) and a temperature measuring sensor (50) which are connected with the temperature loading controller (48);
the temperature loading controller (48) is also connected with the industrial personal computer (3), and the temperature measuring sensor (50) is also connected with the multi-channel analog signal high-speed collector (75).
10. The loading control and data synchronization monitoring device of the true triaxial multi-field coupling and power disturbance platform according to any one of claims 3 to 5, wherein the power disturbance loading control mechanism (7) comprises a power disturbance loading controller (56), and a pneumatic power disturbance loading actuator (57) and a pneumatic pressure sensor (58) which are both connected with the power disturbance loading controller (56);
the pneumatic power disturbance loading actuating mechanism (57) is also provided with a first dynamic strain gauge (62) for monitoring disturbance loading waveforms; the power disturbance loading controller (56) is further connected with the industrial personal computer (3), and the first dynamic strain gauge (62) is further connected with the ultra-dynamic strain gauge (77).
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112763694A (en) * | 2021-01-29 | 2021-05-07 | 太原理工大学 | Two-dimensional analog simulation test device and method for dynamic disturbance of mine mining |
| CN114414136A (en) * | 2021-12-30 | 2022-04-29 | 西安航天计量测试研究所 | Non-contact pressure measuring method and system based on strain and temperature sensors |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101502425A (en) * | 2009-03-09 | 2009-08-12 | 西安交通大学 | System and method for detecting characteristic of vocal cord vibration mechanics |
| CN202083600U (en) * | 2011-05-30 | 2011-12-21 | 浣石 | Three-dimensional impact loading experiment device |
| CN104458428A (en) * | 2014-12-17 | 2015-03-25 | 河海大学 | Large-sized fluid-solid-heat multi-field coupling test loading system |
| CN104637234A (en) * | 2015-02-11 | 2015-05-20 | 中煤科工集团重庆研究院有限公司 | Smoke detector calibrating device and calibrating method based on laser scattering measurement principle |
| CN104977234A (en) * | 2015-06-23 | 2015-10-14 | 安徽理工大学 | Pressure rock failure and instability process and dynamic permeability test apparatus and method thereof |
| CN105185420A (en) * | 2015-05-26 | 2015-12-23 | 中国科学技术大学 | Automatic detection device and method for cooling water film coverage on nuclear power plant containment surface |
| CN105547849A (en) * | 2016-03-01 | 2016-05-04 | 安徽理工大学 | True triaxial loading and unloading test device for large-size bedded pressure-bearing rock and testing method |
| CN105652315A (en) * | 2016-01-19 | 2016-06-08 | 山东大学 | Multichannel sound emission monitoring system and positioning method in underground engineering construction process |
| CN109708980A (en) * | 2019-01-15 | 2019-05-03 | 河南理工大学 | More many reference amounts Simultaneous Monitoring dynamically load experimental provisions of one kind and application method |
| CN110095345A (en) * | 2019-04-12 | 2019-08-06 | 山东科技大学 | A kind of adjustable true triaxial test machine of load rigidity and test method |
| CN110308258A (en) * | 2019-07-02 | 2019-10-08 | 中国矿业大学 | A kind of multi- scenarios method visualization coal and gas postponing bursting experimental rig |
| CN110779801A (en) * | 2019-10-23 | 2020-02-11 | 西安理工大学 | Geotechnical true triaxial tester control system and control method thereof |
| CN111157378A (en) * | 2020-03-10 | 2020-05-15 | 南昌航空大学 | Piezoelectric multi-field coupling induced vibration fatigue experimental device and test method |
| CN111271060A (en) * | 2020-01-20 | 2020-06-12 | 王�琦 | Multi-field coupling mine intelligent mining model test system |
| CN111337648A (en) * | 2020-04-10 | 2020-06-26 | 安徽理工大学 | Evolution test device and method for large-size fractured rock rectangular cavity water inrush multi-field precursor information |
-
2020
- 2020-07-30 CN CN202010750131.7A patent/CN111830240B/en active Active
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101502425A (en) * | 2009-03-09 | 2009-08-12 | 西安交通大学 | System and method for detecting characteristic of vocal cord vibration mechanics |
| CN202083600U (en) * | 2011-05-30 | 2011-12-21 | 浣石 | Three-dimensional impact loading experiment device |
| CN104458428A (en) * | 2014-12-17 | 2015-03-25 | 河海大学 | Large-sized fluid-solid-heat multi-field coupling test loading system |
| CN104637234A (en) * | 2015-02-11 | 2015-05-20 | 中煤科工集团重庆研究院有限公司 | Smoke detector calibrating device and calibrating method based on laser scattering measurement principle |
| CN105185420A (en) * | 2015-05-26 | 2015-12-23 | 中国科学技术大学 | Automatic detection device and method for cooling water film coverage on nuclear power plant containment surface |
| CN104977234A (en) * | 2015-06-23 | 2015-10-14 | 安徽理工大学 | Pressure rock failure and instability process and dynamic permeability test apparatus and method thereof |
| CN105652315A (en) * | 2016-01-19 | 2016-06-08 | 山东大学 | Multichannel sound emission monitoring system and positioning method in underground engineering construction process |
| CN105547849A (en) * | 2016-03-01 | 2016-05-04 | 安徽理工大学 | True triaxial loading and unloading test device for large-size bedded pressure-bearing rock and testing method |
| CN109708980A (en) * | 2019-01-15 | 2019-05-03 | 河南理工大学 | More many reference amounts Simultaneous Monitoring dynamically load experimental provisions of one kind and application method |
| CN110095345A (en) * | 2019-04-12 | 2019-08-06 | 山东科技大学 | A kind of adjustable true triaxial test machine of load rigidity and test method |
| CN110308258A (en) * | 2019-07-02 | 2019-10-08 | 中国矿业大学 | A kind of multi- scenarios method visualization coal and gas postponing bursting experimental rig |
| CN110779801A (en) * | 2019-10-23 | 2020-02-11 | 西安理工大学 | Geotechnical true triaxial tester control system and control method thereof |
| CN111271060A (en) * | 2020-01-20 | 2020-06-12 | 王�琦 | Multi-field coupling mine intelligent mining model test system |
| CN111157378A (en) * | 2020-03-10 | 2020-05-15 | 南昌航空大学 | Piezoelectric multi-field coupling induced vibration fatigue experimental device and test method |
| CN111337648A (en) * | 2020-04-10 | 2020-06-26 | 安徽理工大学 | Evolution test device and method for large-size fractured rock rectangular cavity water inrush multi-field precursor information |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112763694A (en) * | 2021-01-29 | 2021-05-07 | 太原理工大学 | Two-dimensional analog simulation test device and method for dynamic disturbance of mine mining |
| CN112763694B (en) * | 2021-01-29 | 2023-10-03 | 太原理工大学 | Two-dimensional similarity simulation test device and method for dynamic disturbance of mine exploitation |
| CN114414136A (en) * | 2021-12-30 | 2022-04-29 | 西安航天计量测试研究所 | Non-contact pressure measuring method and system based on strain and temperature sensors |
| CN114414136B (en) * | 2021-12-30 | 2024-05-31 | 西安航天计量测试研究所 | Non-contact pressure measurement method and system based on strain and temperature sensors |
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