CN103713334B - A kind of time division multiplex combined apparatus for tunneler Geological Advanced Prediction - Google Patents

Abstract

The invention discloses a time-division multiplexing combined device for geological advance prediction of a tunnel boring machine. The core unit of the device includes: a multi-functional parallel combined host control module, a time-division multiplexed control module, an excitation source control module and a parallel High-speed acquisition module. Among them, the excitation source controller integrates three parts: the IP constant current power supply circuit, the elastic wave shock circuit and the radar wave trigger circuit; the high-speed acquisition module is composed of the IP measurement channel, the seismic wave sensing channel and the radar wave receiving channel. The invention realizes the quasi-synchronous detection of various detection units, overcomes the interference problem of the power supply unit and weak point acquisition signals at the same time, realizes the integration and integration of the comprehensive geophysical detection instrument and the tunnel boring machine, and improves the detection efficiency of the tunnel boring machine and detection accuracy.

Description

A time-division multiplexing combined device for geological advance prediction of tunnel boring machine

technical field

The invention relates to a time-division multiplexing combination device used for geological advance prediction of a tunnel boring machine.

Background technique

With the development of society and the advancement of science and technology, the frequency of use of tunnel boring machines has greatly increased in tunnel excavation, and the detection of geological conditions in front of them also needs to be solved urgently, and geological advanced forecasting and exploration instruments emerge in endlessly. However, the device of tunnel boring machine It is very complicated, the cutter head modification space and the advance forecast time are very limited, and the advance forecast time for roadheader construction is only about 1 hour. However, the existing detection methods are generally single-method detection, which is time-consuming and laborious and cannot meet the needs of rapid and accurate detection of tunneling. The requirements of bad geological bodies in front of the machine.

In order to realize the high-efficiency detection of geological advance prediction of tunnel boring machine, it is necessary to develop an integrated and integrated multi-functional device for measurement and control, realize simultaneous detection of multiple detection units, improve detection accuracy, improve detection efficiency, and meet the requirements of advanced detection of tunnel boring machine Under the premise of extremely short time, the comprehensive geophysical detection is realized under the construction conditions of the roadheader.

Contents of the invention

In order to solve the above problems, the present invention realizes the high-efficiency detection of the geological advance prediction of the tunnel boring machine, and proposes a time-division multiplexing combined device for the geological advance prediction of the tunnel boring machine. The present invention uses the method of time-division multiplexing to realize multi-type earth The integration of physical detection units (very small offset elastic wave detection unit, focused three-dimensional induced polarization detection unit, and borehole directional radar detection unit) is carried out quasi-synchronously with the detection method, thus greatly improving the geological advance prediction detection of tunnel boring machines Efficiency to meet construction requirements.

In order to achieve the above object, the present invention adopts the following technical solutions:

A time-division multiplexing combination device for geological advance prediction of a tunnel boring machine, including a multi-functional parallel combination host control module, a time-division multiplexing control module, an excitation source control module and a parallel data acquisition module, wherein:

The time-division multiplexing control module receives the control instructions sent by the multi-functional parallel host control module, the time-division multiplexing module identifies the instructions, and sends the detection control instructions to the excitation source control module, and sends the data acquisition instructions to the parallel Data acquisition module;

The excitation source control module receives the instructions from the time division multiplexing control module, and after analyzing and processing, sends commands to the power supply control module, the shock control module and the electromagnetic wave emission control module according to the analysis content;

The parallel data acquisition module receives instructions from the time-division multiplexing control module, and communicates with the measurement control module, sensor acquisition control module, and electromagnetic wave reception control module.

The power supply control module receives commands from the excitation source control module, connects multiple current constant current intelligent sensor control power supply modules, and modulates multiple constant current outputs.

The shock control module receives the command of the excitation source control module, generates pulse current to drive the magnetostrictive shock circuit, and is connected with the magnetostrictive shock circuit.

The electromagnetic wave emission control module receives commands from the excitation source control module, controls the radar wave trigger circuit, and generates a high-voltage pulse current to drive electromagnetic field emission.

The measurement control module collects the data of the IP multi-channel measurement circuit and transmits it to the parallel data acquisition module.

The sensing acquisition control module collects data of the elastic wave sensing channel and transmits it to the parallel data acquisition module.

The electromagnetic wave receiving control module collects the data of the radar wave receiving and collecting module, and transmits it to the parallel data collecting module.

The multi-channel current constant current intelligent sensor control power supply module and the excitation multi-channel measurement circuit are connected with the three-dimensional excitation polarization detection unit.

The radar wave trigger circuit and the radar wave receiving and collecting module are connected to the drilling directional radar detection unit.

The elastic wave sensing channel and the magnetostrictive shock circuit are connected with the extremely small offset elastic wave detection unit.

A combination device using the above time division multiplexing, its specific working method is: data acquisition of each detection unit of the extremely small offset elastic wave detection unit, the focused three-dimensional induced polarization detection unit and the borehole directional radar detection unit , there is a waiting time between the acquisition gaps of the two data measuring points, the waiting time depends on the action time of the measuring point switching mechanism, during this waiting time, the time division multiplexing device performs data acquisition work on the other detection unit , that is, the data collection of another detection unit is performed during the data collection gap of one detection unit.

The working principle of the present invention is: by adopting the method of time division multiplexing, the integration and detection of the extremely small offset elastic wave detection unit, the focused three-dimensional induced polarization detection unit and the drilling directional radar detection unit are performed quasi-synchronously. The specific implementation method is: when each type of detection unit performs measurement, there is a certain waiting time between the acquisition gaps of the two data measuring points. The waiting time depends on the switching mechanical action time of the measuring points. For the data collection work of another detection unit, that is, to collect data of another detection unit in the interval of data collection of one detection unit, so as to realize the detection by detection units in different time periods during the whole detection process, to achieve The function of quasi-synchronous detection. The invention realizes the time-division multiplexing quasi-synchronous detection of two or three detection methods, greatly improves the detection efficiency, satisfies the requirement of extremely short advance detection time of the tunnel boring machine, and makes comprehensive geophysical detection possible under the construction condition of the tunnel boring machine.

The beneficial effects of the present invention are:

1. The high-speed combined host with the function of "time-division multiplexing detection" of the present invention realizes the integration and quasi-synchronous detection of each detection unit, and improves the detection efficiency and accuracy.

2. The present invention adopts high-voltage polyethylene insulators, copper nets, and polyvinyl chloride isolation sleeves to realize the interference of high-power supply currents on weak current acquisition signals.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

Among them, 1. Multifunctional parallel connection host control module, 2. Time division multiplexing control module, 3. Excitation source control module, 4. Parallel data acquisition module, 5. Power supply control module, 6. Measurement control module, 7. Excitation Control module, 8. Sensor acquisition control module, 9. Electromagnetic wave emission control module, 10. Electromagnetic wave reception control module, 11. Multi-channel current constant current intelligent sensor control power supply module, 12. Excited multi-channel measurement circuit, 13. Magnetic Scaling shock circuit, 14. Elastic wave sensing channel, 15. Radar wave trigger circuit, 16. Radar wave receiving and acquisition module, 17. Three-dimensional excitation polarization detection unit, 18. Three-component detector, 19. Magnetostrictive shock Device, 20. Borehole directional radar detection unit.

detailed description:

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

As shown in Figure 1, its core unit includes: a multi-function parallel host control module 1, a time division multiplexing control module 2, an excitation source control module 3, and a parallel data acquisition module 4, wherein the excitation source control module integrates The power supply control module 5, the shock control module 7, and the electromagnetic wave emission control 9 are three parts; the parallel data acquisition module 4 is composed of the measurement control module 6, the sensor acquisition control module 8, and the electromagnetic wave receiving control module 10.

The time-division multiplexing control module 2 sends instructions through the multi-function parallel host control module 1 according to the geological conditions, adopts the time-division multiplexing detection strategy, selects two or three of the detection units and switches between the measuring points and the mechanical action. Implement quasi-synchronous control and excitation to complete the automatic working mode of various detection modes. After the detection is completed, the time-division multiplexing control module 2 receives parallel receiving instructions from the multi-function parallel host control module 1, interprets the instructions and transmits them to the parallel data acquisition module 4, and realizes data acquisition of various detection units .

The excitation source control module 3 mainly realizes the communication coordination and control between the multi-function host computer and the power supply control module 5 , the shock control module 7 , and the electromagnetic wave emission control module 9 . The multi-function parallel host control module 1 sends a parallel control command to the time division multiplexing control module 2, and sends a control command to the excitation source control module 3 through the time division multiplexing control module 2, and the excitation source control module 3 receives the command and analyzes it , according to the content of the address resolution, send relevant commands to the corresponding control modules, so as to realize the control and excitation of the power supply control module 5 , the shock control module 7 , and the electromagnetic wave emission control module 9 .

Three control processes, multi-channel current constant current intelligent sensor control power supply module 11, modulates multiple constant high-current outputs; after the shock control module 7 receives and analyzes the control instructions, the drive shock control module 7 generates a drive magnetostrictive shock circuit 13 pulse current; the electromagnetic wave emission control module 9 controls the radar wave trigger circuit 15 to generate a high-voltage pulse current that drives electromagnetic field emission, thereby realizing the joint control between the multi-functional parallel host control module 1 and each control module.

Three types of detection units, focused three-dimensional excitation polarization detection unit, extremely small offset elastic wave detection unit, drilling directional radar detection unit, extremely small offset elastic wave detection unit includes three-component detector 18, magnetostrictive shock device 19, in the case that these three detection units detect at the same time, there is a large power supply current and a data acquisition signal, wherein the large power supply current is a strong electrical signal, and the data acquisition signal is a weak electrical signal, there must be a difference between the strong electrical signal and the weak electrical signal interference problem. In order to avoid this interference, high-voltage polyethylene insulators, copper mesh, and PVC isolation sleeves are used to well realize the excitation and collection of strong and weak electrical signals, thus ensuring the accuracy of the data collected by the final parallel data acquisition module sex.

By adopting the method of time division multiplexing, the integration and quasi-synchronous detection of the extremely small offset elastic wave detection unit, the focused three-dimensional induced polarization detection unit and the borehole directional radar detection unit are realized. The specific implementation method is: when each type of detection unit performs measurement, there is a certain waiting time between the acquisition gaps of the two data measuring points, and the waiting time depends on the mechanical action time of the switching point. The data collection work of another detection unit, that is, the data collection of another detection unit is carried out in the interval of data collection of one detection unit, so that the detection is carried out by detection units in different time periods during the whole detection process, and the accuracy is achieved. The function of synchronous detection. The invention realizes the time-division multiplexing quasi-synchronous detection of two or three detection methods, greatly improves the detection efficiency, satisfies the requirement of extremely short advance detection time of the tunnel boring machine, and makes comprehensive geophysical detection possible under the construction condition of the tunnel boring machine.

After all the detection units are completed, the multi-functional parallel connection host control module 1 sends a parallel acquisition command, which is transmitted to the parallel data acquisition module 4 through the time division multiplexing control module 2, and completes the measurement control module 6, sensor acquisition control module 8, The high-speed acquisition function of the electromagnetic wave receiving control module 10 .

Three collection processes, the IP multi-channel measurement circuit 12 passes through the measurement control module 6, the elastic wave sensing channel 14 passes through the sensing collection control module 8, and the radar wave receiving collection module 16 passes through the electromagnetic wave receiving control module 10, in a multifunctional parallel connection Under the parallel acquisition control command of the host control module 1, all the detection data signals are collected through the parallel data acquisition module 4, and finally the synchronous signal acquisition of the data is completed. The magnetostrictive shock circuit 11 and the excited multi-channel measurement circuit 12 , collecting the information of the three-dimensional excitation polarization detection unit 17, the radar wave trigger circuit 15, the radar wave receiving and collecting module 16 collecting the information of the drilling directional radar detection unit 20, the minimum offset elastic wave detection unit includes a three-component detector 18 1. Magnetostrictive shock 19; the elastic wave sensing channel 14 collects the information of the three-component detector 18, and the magnetostrictive shock circuit 13 collects the information of the magnetostrictive shock 19.

Although the specific implementation of the present invention has been described above in conjunction with the accompanying drawings, it does not limit the protection scope of the present invention. Those skilled in the art should understand that on the basis of the technical solution of the present invention, those skilled in the art do not need to pay creative work Various modifications or variations that can be made are still within the protection scope of the present invention.

Claims (8)

1. A time-division multiplexing combination device for geological advance prediction of tunnel boring machines, characterized in that: it includes a multifunctional parallel connection host control module, a time-division multiplexing control module, an excitation source control module and a parallel data acquisition module, in: The time-division multiplexing control module receives the control instructions sent by the multi-function parallel host control module, the time-division multiplexing control module identifies the instructions, and sends the detection control instructions to the excitation source control module, and sends the data acquisition instructions to the Parallel data acquisition module; The excitation source control module receives the instructions from the time division multiplexing control module, and after analyzing and processing, sends commands to the power supply control module, the shock control module and the electromagnetic wave emission control module according to the analysis content; The parallel data acquisition module receives instructions from the time-division multiplexing control module, and communicates with the measurement control module, sensor acquisition control module, and electromagnetic wave reception control module; The power supply control module is connected to a multi-channel current constant current intelligent sensor control power supply module, and the multi-channel current constant current intelligent sensor control power supply module is connected to a three-dimensional excitation polarization detection unit; The sensing acquisition control module collects the data of the elastic wave sensing channel and transmits it to the parallel data acquisition module, and the elastic wave sensing channel is connected to the elastic wave detection unit with a very small offset distance; The electromagnetic wave receiving control module collects the data of the radar wave receiving and collecting module, and transmits it to the parallel data collecting module, and the radar wave receiving and collecting module is connected to the drilling directional radar detection unit; When each type of detection unit performs measurement, there is a certain waiting time between the acquisition intervals of the two data measuring points, and the waiting time depends on the switching mechanical action time of the measuring points. The device collects data from another detection unit, that is, collects data from another detection unit during the data collection interval of one detection unit, so that detection is performed by detection units in different time periods during the entire detection process . 2. A time-division multiplexing combination device for geological advance prediction of tunnel boring machine as claimed in claim 1, characterized in that: the power supply control module receives the command of the excitation source control module and connects multiple current constant The flow intelligent sensor control power supply module modulates multiple constant current outputs. 3. A time-division multiplexing combination device for geological advance prediction of tunnel boring machine as claimed in claim 1, characterized in that: the shock control module receives the command of the excitation source control module to generate a drive magnetostrictive The pulse current of the exciting circuit is connected with the magnetostrictive exciting circuit. 4. A time-division multiplexing combination device for geological advance prediction of tunnel boring machine as claimed in claim 1, characterized in that: the electromagnetic wave emission control module receives the command of the excitation source control module to control the triggering of radar waves A circuit that generates high-voltage pulsed currents that drive electromagnetic field emissions. 5. A time-division multiplexing combination device for geological advance prediction of tunnel boring machines as claimed in claim 2, characterized in that: the multi-channel current constant current intelligent sensor control power supply module and the excitation multi-channel measurement circuit , connected with the three-dimensional excited polarization detection unit. 6. A time-division multiplexing combination device for geological advance prediction of tunnel boring machine as claimed in claim 4, characterized in that: the radar wave trigger circuit and the radar wave receiving and collecting module are connected to the borehole directional radar detection unit . 7. A time-division multiplexing combination device for geological advance prediction of tunnel boring machine as claimed in claim 3, characterized in that: the elastic wave sensing channel, the magnetostrictive shock circuit, and the extremely small offset Connect from the elastic wave detection unit. 8. A working method using the time-division multiplexing combination device according to any one of claims 1-7, characterized in that: a very small offset elastic wave detection unit, a three-dimensional induced polarization detection unit and a drill The data acquisition of each type of detection unit of the hole directional radar detection unit has a waiting time between the collection intervals of two data measuring points, and the waiting time depends on the action time of the measuring point switching mechanism. The combined device is used to collect data from another detection unit, that is, to collect data from another detection unit during the data collection interval of one detection unit.