Wireless advanced detection system and detection method in roadway hole

Abstract

According to the wireless advanced detection system in the roadway hole and the detection method, on one hand, an acquisition assembly and a vibration sensing assembly are independently arranged and are integrated into a whole, so that the situation that connection through a cable is prone to being interfered by external electromagnetic waves in the prior art is avoided, and the capacity of acquiring extremely weak signals is enhanced; on the other hand, starting trigger signals and collected data are transmitted wirelessly, construction is not affected by cable damage, and the data are digitally stored and wirelessly transmitted immediately after being collected and are not interfered by the environment. In addition, the computer and the wireless probe adopt wireless transmission instead of cable connection, so that the computer cannot interfere with data acquisition, the construction complexity is simplified, the workload is reduced, and the capability of acquiring extremely weak signals and the detection efficiency are improved. Besides, the wireless probe is buried in the drill hole and is not influenced by the external environment, the external interference is reduced, the resolution ratio of acquired data is improved, and the sensor buried in the drill hole is better coupled with a measured medium, so that weak seismic signals can be sensed more easily.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel hole advance detection, and in particular to a wireless advance detection system and a detection method in a tunnel hole. Background Art

[0002] Laneways mainly involve various channels for engineering construction excavation such as tunnel laneways, underground laneways, bunker laneways, etc. At present, the laneway advance prediction equipment used is mainly based on various reflection seismic technologies, such as TSP, TRT and TST, which are all reflection seismic prediction technologies.

[0003] Among the existing tunnel geological advance detection equipment, some use separate designs for sensor components and collection components, while others install the sensor components in the borehole. They all have cables connecting the sensor components and the collection components for the transmission of analog signals. In this way, external electromagnetic waves not only interfere with the collection components, but also easily interfere with the cables, affecting the collection of extremely weak signals. Although some use the sensor components and collection components integrated into one, the collection sensor device is installed on the tunnel wall in this way. In this case, external electromagnetic waves will inevitably interfere with the collection sensor device, which also affects the collection of extremely weak signals. Summary of the invention

[0004] To this end, it is necessary to provide a wireless advance detection system and detection method in a tunnel hole to solve the technical problem that external electromagnetic waves in existing tunnel geological advance detection equipment interfere with collection components, affecting the collection of extremely weak signals.

[0005] To achieve the above objectives, in a first aspect, the present invention provides a wireless advance detection system in a tunnel hole, comprising:

[0006] At least one wireless probe, the wireless probe comprises a vibration sensing component, a first connector, a collection mechanism, a second connector, a push rod, an end cover, a data antenna, a start antenna and a spring piece, the vibration sensing component, the first connector, the collection mechanism, the second connector, the push rod and the end cover are sequentially connected in a horizontal direction, the data antenna and the start antenna are connected to the end cover in parallel, the collection mechanism comprises a collection housing and a bracket installed in the collection housing, a collection component, a power supply component and a wireless transmission component, the spring piece is installed on the collection housing, the collection component, the power supply component and the wireless transmission component are installed on the bracket, the collection component is connected to the vibration sensing component through the first connector, the wireless transmission component is sequentially connected to the data antenna and the start antenna through the second connector, the push rod and the end cover, and the power supply component supplies power to the vibration sensing component, the collection component and the wireless transmission component;

[0007] A wireless start-up transmitter, the wireless start-up transmitter comprises a seismic source and a wireless start-up transmitter, the seismic source is connected to the wireless start-up transmitter, and the wireless start-up transmitter is wirelessly connected to the wireless probe;

[0008] Wireless router, wireless connection between the wireless router and the wireless probe;

[0009] Computer, computer is wirelessly connected to the wireless router.

[0010] As an embodiment of the present invention, the vibration sensing assembly includes a sensing housing, a first fixing seat, a first sensor, a second sensor and a second fixing seat, the first fixing seat is installed in the sensing housing along the vertical direction, the second fixing seat is installed at the bottom of the sensing housing, the first sensor is installed on the first fixing seat, and the second sensor is installed on the second fixing seat.

[0011] As an embodiment of the present invention, the first sensor includes a MEMS sensor circuit 1, a first-order filter circuit 1, a first-order filter circuit 2, a single-ended to differential circuit 1, a single-ended to differential circuit 2, an output X-axis differential signal P1P2, and an output Y-axis differential signal P3P4, the MEMS sensor circuit 1 includes an X-axis output component and a Y-axis output component, the X-axis output component, the first-order filter circuit 1, the single-ended to differential circuit 1, and the output X-axis differential signal P1P2 are connected in sequence, and the Y-axis output component, the first-order filter circuit 2, the single-ended to differential circuit 2, and the output Y-axis differential signal P3P4 are connected in sequence;

[0012] The second sensor includes a second MEMS sensor circuit, a third first-order filter circuit, a fourth first-order filter circuit, a third single-ended to differential circuit, a fourth single-ended to differential circuit, an output ZX axis differential signal P5P6, and an output ZY axis differential signal P7P8. The second MEMS sensor circuit includes a ZX axis output component and a ZY axis output component. The ZX axis output component, the third first-order filter circuit, the third single-ended to differential circuit, and the output ZX axis differential signal P5P6 are connected in sequence. The ZY axis output component, the fourth first-order filter circuit, the fourth single-ended to differential circuit, and the output ZY axis differential signal P7P8 are connected in sequence.

[0013] The output X-axis differential signals P1P2 correspond to the differential positive signal X+ and the negative signal X- respectively, the output Y-axis differential signals P3P4 correspond to the differential positive signal Y+ and the negative signal Y- respectively, the output ZX-axis differential signals P5P6 correspond to the differential positive signal ZX+ and the negative signal ZX- respectively, and the output ZY-axis differential signals P7P8 correspond to the differential positive signal ZY+ and the negative signal ZY- respectively.

[0014] As an implementation mode of the present invention, the acquisition component includes an acquisition expansion board, a first acquisition module, a second acquisition module and a microcontroller module, and the first acquisition module, the second acquisition module and the microcontroller module are installed on the acquisition expansion board;

[0015] The power supply assembly includes a battery housing, a battery pack, a protection board and a power module. The battery housing is provided with a battery pack and a protection board, and the power module is provided on the acquisition expansion board.

[0016] The wireless transmission component includes a wireless data communication module and a wireless start receiving module.

[0017] As an embodiment of the present invention, the first acquisition module includes a first signal processing circuit and a second signal processing circuit, the first signal processing circuit includes an amplifier circuit 1, an analog filter circuit 1, a buffer amplifier circuit 1, an acquisition circuit 1 and a signal switching circuit connected in sequence, and the second signal processing circuit includes an amplifier circuit 2, an analog filter circuit 2, a buffer amplifier circuit 2 and an acquisition circuit 2 connected in sequence;

[0018] The second acquisition module includes a third signal processing circuit and a fourth signal processing circuit, the third signal processing circuit includes an amplifier circuit 3, an analog filter circuit 3, a buffer amplifier circuit 3 and an acquisition circuit 3 connected in sequence, and the fourth signal processing circuit includes an amplifier circuit 4, an analog filter circuit 4, a buffer amplifier circuit 4 and an acquisition circuit 4 connected in sequence;

[0019] The microcontroller module is connected to the signal switching circuit, the second acquisition circuit, the third acquisition circuit and the fourth acquisition circuit respectively.

[0020] As an embodiment of the present invention, the acquisition mechanism also includes a start signal processing circuit, the wireless data communication module includes a wireless data communication interface circuit, a wireless data communication module power supply circuit and a wireless data transmission module, the wireless data communication interface circuit is connected to the microcontroller module, and the wireless data communication module power supply circuit supplies power to the wireless data transmission module;

[0021] The wireless start-up receiving module includes an analog receiving module, a start-up receiving battery monitoring circuit and a start-up receiving interface circuit. The start-up receiving battery monitoring circuit is connected to the power supply module through the start-up receiving interface circuit, and the start-up receiving interface circuit is connected to the start-up signal processing circuit.

[0022] As an embodiment of the present invention, the start-up signal processing circuit includes an amplifying and filtering circuit, a start-up threshold setting circuit and a signal processing interface circuit. The amplifying and filtering circuit is connected to the start-up threshold setting circuit, the start-up threshold setting circuit is connected to the microcontroller module, and the signal processing interface circuit is connected to the power supply module.

[0023] As an embodiment of the present invention, the wireless start transmitter includes a start mode selection circuit, an analog transmission module, a start transmission battery monitoring circuit, a transmission power interface circuit, a transmission battery and a transmitter power supply. The start mode selection circuit is connected to the analog transmission module, the start transmission battery monitoring circuit is connected to the transmission power interface circuit, the transmission power interface circuit is connected to the transmission battery, and the transmitter power supply is used to power the start mode selection circuit, the analog transmission module and the source.

[0024] As an embodiment of the present invention, the seismic source includes a hammer seismic source, a cannon seismic source and an active seismic source. After being connected, the hammer seismic source and the cannon seismic source are connected to one of the interfaces of the start-up mode selection circuit, and the active seismic source is connected to another interface of the start-up mode selection circuit.

[0025] To achieve the above object, in a second aspect, the inventor provides a method for wireless advance detection in a tunnel hole, comprising any wireless advance detection system in a tunnel hole provided by the inventor above, and further comprising the following steps:

[0026] S101: at a specified distance from the tunnel head in the horizontal direction, two or more boreholes are evenly distributed on the periphery of the arcuate plane perpendicular to the tunnel direction and parallel to the tunnel head plane, the distance between two adjacent boreholes is the same, the height of the borehole closest to the ground plane on the left side of the tunnel is the same as the height of the borehole closest to the ground plane on the right side of the tunnel, and at a specified horizontal distance from the two boreholes, two or more excitation points are evenly distributed in the horizontal direction, and the distance between two adjacent excitation points is the same;

[0027] S102: After drilling all the holes, turn on the power switches of all the wireless probes to power on the switch of each wireless probe, and then use the push rod to align the wireless probe with the borehole and push it to the bottom of the hole. At this time, it should be ensured that the X-axis of the sensor in the vibration sensor assembly of all the wireless probes always points horizontally to the head of the tunnel, and at the same time, the wireless probes that are tilted downward or vertically downward are reinforced to prevent the wireless probes from slipping;

[0028] S103: After the wireless probe is installed, the computer sets parameters for the wireless probe before collecting data on site, the parameters including the number of signal collection sampling points N, the number of advanced sampling points n0, the sampling interval and the amplification gain. After the parameters of each component are set, the wireless probe and the wireless start-up transmitter send a "ready" signal to the computer, and wait for the wireless start-up transmitter to send a "collection" signal;

[0029] S104: After receiving the "ready" signal from the wireless probe, the computer immediately sends a "collection" command to the wireless probe in a broadcasting manner, and then performs data pre-collection, that is, enters an advance continuous sampling state;

[0030] S105: Then, when the earthquake source generates a trigger signal, the wireless start transmitting device immediately sends a trigger signal to the wireless probe, and the wireless probe immediately starts synchronous acquisition. When each of the wireless probes acquires the preset number of acquisition sample points N, the wireless probe stops acquiring;

[0031] S106: The wireless probe stops collecting data, and the number of collected sample points N is translated back to the preset number of advanced sampling points n0, and then the processed number of collected sample points N is sent to the computer, which directly processes the data and obtains the detection results.

[0032] Different from the prior art, the technical solution of the present application, on the one hand, sets the acquisition component and the vibration sensor component to be independent and integrated, so as to avoid the existing cable connection that is easily interfered by external electromagnetic waves and enhance the ability to collect extremely weak signals. On the other hand, the start trigger signal and the collected data are both transmitted wirelessly, and there is no cable damage to affect the construction. After the data collection is completed, it is immediately digitized and saved and wirelessly transmitted without being interfered by the environment. In addition, since the computer and the wireless probe are connected by wireless transmission without cables, the computer will not interfere with the data collection, which simplifies the construction complexity, reduces the workload, and improves the ability to collect extremely weak signals and the detection efficiency. In addition, since the wireless probe is buried in the borehole, it is not affected by the external environment, reduces external interference, improves the resolution of the collected data, and the sensor buried in the borehole is better coupled with the measured medium, making it easier to sense weak seismic signals.

[0033] The above-mentioned records related to the invention content are only an overview of the technical solution of the present application. In order to enable ordinary technicians in the field to more clearly understand the technical solution of the present application, and then implement it according to the text of the specification and the contents recorded in the drawings, and to make the above-mentioned purpose and other purposes, features and advantages of the present application easier to understand, the following is an explanation in combination with the specific implementation mode and drawings of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The drawings are only used to illustrate the principles, implementation methods, applications, characteristics and effects of the specific embodiments of the present application and other related contents, and shall not be considered as limitations of the present application.

[0035] In the drawings of the specification:

[0036] Figure 1 A system block diagram of a wireless advance detection system in a tunnel hole according to an embodiment of the present application;

[0037] Figure 2 This is a schematic diagram of the structure of a wireless probe according to an embodiment of the present application;

[0038] Figure 3 A circuit schematic diagram of a power supply assembly according to an embodiment of the present application;

[0039] Figure 4 This is a schematic structural diagram of a vibration sensor assembly according to an embodiment of the present application;

[0040] Figure 5 A circuit schematic diagram of a vibration sensor assembly according to an embodiment of the present application;

[0041] Figure 6 This is a structural exploded view of a wireless probe according to an embodiment of the present application;

[0042] Figure 7 This is a circuit schematic diagram of a wireless probe according to an embodiment of the present application;

[0043] Figure 8 This is a schematic diagram of a first signal processing circuit according to an embodiment of the present application;

[0044] Fig. 9 A circuit schematic diagram of a wireless data communication module according to an embodiment of the present application;

[0045] Fig.10 This is a circuit schematic diagram of a wireless start-up receiving module according to an embodiment of the present application;

[0046] Fig.11 A schematic diagram of a startup signal processing circuit according to an embodiment of the present application;

[0047] Fig.12 This is a circuit diagram of a wireless start-up transmitter according to an embodiment of the present application;

[0048] Fig.13 This is a schematic diagram of the lane layout and installation of a detection system according to an embodiment of the present application;

[0049] Fig.14 This is a schematic diagram of on-site advance detection construction in a tunnel according to an embodiment of the present application.

[0050] The reference numerals in the above drawings are described as follows:

[0051] 100-wireless advance detection system in tunnel hole; 1-wireless probe; 11-vibration sensor assembly; 111-sensor housing; 112-first fixing seat; 113-first sensor; 114-second sensor; 115-second fixing seat; 12-first connector; 13-collection mechanism; 131-collection housing; 132-bracket; 133-collection assembly; 1331-collection expansion board; 1332-first collection module; 1333-second collection module; 1334-microcontroller module; 134- Power supply assembly; 1341-battery housing; 1342-power module; 135-wireless transmission assembly; 1351-wireless data communication module; 1352-wireless start receiving module; 136-start signal processing circuit; 14-second connector; 15-push rod; 16-end cover; 17-data antenna; 18-start antenna; 19-shrapnel; 2-wireless start transmitting device; 21-seismic source; 22-wireless start transmitter; 3-wireless router; 4-computer; X-horizontal direction; Y-vertical direction. DETAILED DESCRIPTION

[0052] In order to explain in detail the possible application scenarios, technical principles, specific schemes that can be implemented, and the purposes and effects that can be achieved, the following is a detailed description of the specific embodiments listed in conjunction with the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0053] Reference to "embodiment" herein means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present application. The term "embodiment" appearing in various places in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or association with other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, the various technical features mentioned in the embodiments can be combined in any way to form a corresponding implementable technical solution.

[0054] Unless otherwise defined, the technical terms used in this document have the same meanings as those generally understood by those skilled in the art to which this application belongs; the use of relevant terms in this document is only for describing specific embodiments and is not intended to limit this application.

[0055] In the description of this application, the term "and / or" is an expression used to describe the logical relationship between objects, indicating that three relationships may exist, for example, A and / or B, which means: A exists, B exists, and A and B exist at the same time. In addition, the character " / " in this article generally indicates that the objects before and after are in an "or" logical relationship.

[0056] In the present application, terms such as “first” and “second” are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship of quantity, priority or sequence between these entities or operations.

[0057] Without further limitations, in this application, the words "include", "comprises", "has" or other similar expressions used in the sentences are intended to cover non-exclusive inclusion. These expressions do not exclude the presence of additional elements in the process, method or product including the elements, so that the process, method or product including a series of elements may include not only those limited elements, but also other elements not explicitly listed, or also include elements inherent to such process, method or product.

[0058] Similar to the understanding in the Examination Guidelines, in this application, expressions such as "greater than", "less than", "exceed" and the like are understood to exclude the number itself; expressions such as "above", "below", "within" and the like are understood to include the number itself. In addition, in the description of the embodiments of this application, "multiple" means more than two (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups", "multiple times", etc., unless otherwise clearly and specifically limited.

[0059] In the description of the embodiments of the present application, space-related expressions used, such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or position relationship based on the orientation or position relationship shown in the specific embodiments or drawings, and are only for the convenience of describing the specific embodiments of the present application or facilitating the reader's understanding, and do not indicate or imply that the referred device or component must have a specific position, a specific orientation, or be constructed or operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0060] Unless otherwise expressly specified or limited, in the description of the embodiments of the present application, the terms such as "install", "connect", "connect", "fix", "set", etc. used should be understood in a broad sense. For example, the "connection" can be a fixed connection, a detachable connection, or an integrated setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For technicians in the technical field to which the present application belongs, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0061] For the convenience of explanation, the horizontal direction and the vertical direction are set, and the horizontal direction and the vertical direction are directions perpendicular to each other. Figure 2 As shown by the arrows, the direction of arrow X is the horizontal direction, and the direction of arrow Y is the vertical direction.

[0062] According to some embodiments of the present application, please refer to Figures 1 to 3 The present embodiment relates to a wireless advance detection system 100 in a tunnel hole, comprising at least one wireless probe 1, a wireless start-up transmitter 2, a wireless router 3 and a computer 4. The wireless probe 1 comprises a vibration sensor assembly 11, a first connector 12, a collection mechanism 13, a second connector 14, a push rod 15, an end cover 16, a data antenna 17, a start antenna 18 and a spring 19. The vibration sensor assembly 11, the first connector 12, the collection mechanism 13, the second connector 14, the push rod 15 and the end cover 16 are sequentially connected along a horizontal direction X. The data antenna 17 and the start antenna 18 are connected to the end cover 16 in parallel. The collection mechanism 13 comprises a collection housing 131 and a bracket 132 installed in the collection housing 131, a collection assembly 133, a power supply assembly 134 and a wireless transmission assembly 13 5. The shrapnel 19 is installed on the collection housing 131. The collection component 133, the power component 134 and the wireless transmission component 135 are installed on the bracket 132. The collection component 133 is connected to the vibration sensor component 11 through the first connector 12. The wireless transmission component 135 is connected to the data antenna 17 and the start antenna 18 through the second connector 14, the push rod 15 and the end cover 16 respectively. The power component 134 supplies power to the vibration sensor component 11, the collection component 133 and the wireless transmission component 135. The wireless start transmitting device 2 includes a source 21 and a wireless start transmitter 22. The source 21 is connected to the wireless start transmitter 22. The wireless start transmitter 22 is wirelessly connected to the wireless probe 1. The wireless router 3 is wirelessly connected to the wireless probe 1. The computer 4 is wirelessly connected to the wireless router 3.

[0063] One or more wireless probes 1 can be provided, and they are set according to the actual conditions of the lane. Among them, the vibration sensing component 11, the first connector 12, the acquisition component 133, the wireless transmission component 135, the second connector 14, the push rod 15 and the end cover 16 are connected in sequence. Optionally, the power module 1342 supplies power to the vibration sensing component 11, the acquisition component 133, the start signal processing circuit 136 and the wireless transmission component 135.

[0064] According to some embodiments of the present application, optionally, Figure 4As shown, the vibration sensor assembly 11 includes a sensor housing 111, a first fixing base 112, a first sensor 113, a second sensor 114 and a second fixing base 115. The first fixing base 112 is installed in the sensor housing 111 along the vertical direction Y, the second fixing base 115 is installed at the bottom of the sensor housing 111, the first sensor 113 is installed on the first fixing base 112, and the second sensor 114 is installed on the second fixing base 115.

[0065] Among them, the sensing housing 111 is conical, the first fixing seat 112 is an XY axis MEMS fixing seat, the first sensor 113 is an XY axis MEMS core PCB board sensor, the second fixing seat 115 is a Z axis MEMS fixing seat, and the second sensor 114 is a Z axis MEMS core PCB board sensor. Optionally, the sensing housing 111 and the first fixing seat 112 are integral components processed from cylindrical metal materials, the second fixing seat 115 is a semi-cylindrical component processed from cylindrical metal materials, the first sensor 113 is installed on the first fixing seat 112 through a thin layer of insulating material, and the second sensor 114 is installed on the second fixing seat 115 through a thin layer of insulating material.

[0066] According to some embodiments of the present application, optionally, Figure 5 As shown, the first sensor 113 includes a MEMS sensor circuit 1, a first-order filter circuit 1, a first-order filter circuit 2, a single-ended to differential circuit 1, a single-ended to differential circuit 2, an output X-axis differential signal P1P2, and an output Y-axis differential signal P3P4. The MEMS sensor circuit 1 includes an X-axis output component and a Y-axis output component. The X-axis output component, the first-order filter circuit 1, the single-ended to differential circuit 1, and the output X-axis differential signal P1P2 are connected in sequence, and the Y-axis output component, the first-order filter circuit 2, the single-ended to differential circuit 2, and the output Y-axis differential signal P3P4 are connected in sequence. The second sensor 114 includes a MEMS sensor circuit 2, a first-order filter circuit 3, a first-order filter circuit 4, a single-ended to differential circuit 3, a single-ended to differential circuit 4, and an output Z-axis differential signal P5P 6 and output ZY axis differential signal P7P8, MEMS sensor circuit 2 includes ZX axis output component and ZY axis output component, ZX axis output component, first-order filter circuit 3, single-ended to differential circuit 3 and output ZX axis differential signal P5P6 are connected in sequence, ZY axis output component, first-order filter circuit 4, single-ended to differential circuit 4 and output ZY axis differential signal P7P8 are connected in sequence; output X axis differential signal P1P2 corresponds to differential positive signal X+ and negative signal X- respectively, output Y axis differential signal P3P4 corresponds to differential positive signal Y+ and negative signal Y- respectively, output ZX axis differential signal P5P6 corresponds to differential positive signal ZX+ and negative signal ZX- respectively, output ZY axis differential signal P7P8 corresponds to differential positive signal ZY+ and negative signal ZY- respectively.

[0067] By setting the specific structure and dedicated circuit of the vibration sensor component 11, extremely weak effective seismic signals can be better obtained.

[0068] According to some embodiments of the present application, optionally, Figure 6 As shown, the acquisition component 133 includes an acquisition expansion board 1331, a first acquisition module 1332, a second acquisition module 1333 and a microcontroller module 1334, and the acquisition expansion board 1331 is equipped with the first acquisition module 1332, the second acquisition module 1333 and the microcontroller module 1334; the power supply component 134 includes a battery housing 1341, a battery pack, a protection board and a power supply module 1342, and the battery housing 1341 is equipped with a battery pack and a protection board, and the power supply module 1342 is installed on the acquisition expansion board 1331; the wireless transmission component 135 includes a wireless data communication module 1351 and a wireless start receiving module 1352.

[0069] According to some embodiments of the present application, optionally, Figure 7 and Figure 8 As shown, the first acquisition module 1332 includes a first signal processing circuit and a second signal processing circuit, the first signal processing circuit includes an amplifier circuit 1, an analog filter circuit 1, a buffer amplifier circuit 1, an acquisition circuit 1 and a signal switching circuit connected in sequence, and the second signal processing circuit includes an amplifier circuit 2, an analog filter circuit 2, a buffer amplifier circuit 2 and an acquisition circuit 2 connected in sequence; the second acquisition module 1333 includes a third signal processing circuit and a fourth signal processing circuit, the third signal processing circuit includes an amplifier circuit 3, an analog filter circuit 3, a buffer amplifier circuit 3 and an acquisition circuit 3 connected in sequence, and the fourth signal processing circuit includes an amplifier circuit 4, an analog filter circuit 4, a buffer amplifier circuit 4 and an acquisition circuit 4 connected in sequence; the micro-control module 1334 is respectively connected to the signal switching circuit, the acquisition circuit 2, the acquisition circuit 3 and the acquisition circuit 4.

[0070] By setting the specific structure and dedicated circuit of the acquisition component 133, extremely weak effective seismic signals can be better acquired.

[0071] According to some embodiments of the present application, optionally, Fig. 9 and Fig.10As shown, the acquisition mechanism 13 also includes a start signal processing circuit 136, the wireless data communication module 1351 includes a wireless data communication interface circuit, a wireless data communication module 1351 power supply circuit and a wireless data transmission module, the wireless data communication interface circuit is connected to the microcontroller module 1334, and the wireless data communication module 1351 power supply circuit supplies power to the wireless data transmission module; the wireless start receiving module 1352 includes an analog receiving module, a start receiving battery monitoring circuit and a start receiving interface circuit, the start receiving battery monitoring circuit is connected to the power module 1342 via the start receiving interface circuit, and the start receiving interface circuit is connected to the start signal processing circuit 136.

[0072] Data is transmitted wirelessly through the wireless data communication module 1351, thereby preventing data transmission from being affected by the environment and preventing cable breakage from affecting construction.

[0073] According to some embodiments of the present application, optionally, Fig.11 As shown, the start signal processing circuit 136 includes an amplifying and filtering circuit, a start threshold setting circuit and a signal processing interface circuit. The amplifying and filtering circuit is connected to the start threshold setting circuit, the start threshold setting circuit is connected to the microcontroller module 1334, and the signal processing interface circuit is connected to the power supply module 1342.

[0074] According to some embodiments of the present application, optionally, Fig.12 As shown, the wireless start transmitter 22 includes a start mode selection circuit, an analog transmission module, a start transmission battery monitoring circuit, a transmission power interface circuit, a transmission battery and a transmitter power supply. The start mode selection circuit is connected to the analog transmission module, the start transmission battery monitoring circuit is connected to the transmission power interface circuit, the transmission power interface circuit is connected to the transmission battery, and the transmitter power supply supplies power for the start mode selection circuit, the analog transmission module and the source 21.

[0075] The wireless start transmitter 22 is wirelessly connected to the wireless probe 1, thereby preventing data transmission from being affected by the environment and preventing cable breakage from affecting construction.

[0076] According to some embodiments of the present application, optionally, Fig.12 As shown, the seismic source 21 includes a hammer seismic source, a cannon seismic source and an active seismic source. After being connected, the hammer seismic source and the cannon seismic source are connected to one of the interfaces of the start mode selection circuit, and the active seismic source is connected to the other interface of the start mode selection circuit.

[0077] According to some embodiments of the present application, please refer to Fig.13 and Fig.14 The present embodiment also relates to a method for wireless advance detection in a tunnel hole, including a wireless advance detection system 100 in a tunnel hole, and further comprising the following steps:

[0078] S101: at a specified distance from the tunnel head along the horizontal direction X, two or more boreholes are evenly distributed on the periphery of the arcuate plane perpendicular to the tunnel direction and parallel to the tunnel head plane, the distance between two adjacent boreholes is the same, the height of the borehole closest to the ground plane on the left side of the tunnel is the same as the height of the borehole closest to the ground plane on the right side of the tunnel, and at a specified horizontal distance from the two boreholes, two or more excitation points are evenly distributed along the horizontal direction X, and the distance between two adjacent excitation points is the same;

[0079] S102: After all the holes are drilled, turn on the power switches of all the wireless probes 1 to power on the switch of each wireless probe 1, and then use the push rod 15 to align the wireless probe 1 with the drill hole and push it to the bottom of the hole. At this time, it should be ensured that the X-axis of the sensor in the vibration sensor assembly 11 of all the wireless probes 1 always points horizontally to the head of the tunnel, and at the same time, the wireless probes 1 that are tilted downward or vertically downward are reinforced to prevent the wireless probes 1 from slipping;

[0080] S103: After the wireless probe 1 is installed, the computer 4 sets parameters for the wireless probe 1 before collecting data on site, the parameters including the number of signal collection samples N, the number of advanced sampling points n0, the sampling interval and the amplification gain. After the parameters of each component are set, the wireless probe 1 and the wireless start-up transmitter 2 send a "ready" signal to the computer 4, and wait for the wireless start-up transmitter 2 to send a "collection" signal;

[0081] S104: After receiving the "ready" signal from the wireless probe 1, the computer 4 immediately sends a "collection" command to the wireless probe 1 in a broadcasting manner, and then performs data pre-collection, that is, enters the advance continuous sampling state;

[0082] S105: Then, when the seismic source 21 generates a trigger signal, the wireless start-up transmitter 2 immediately sends a trigger signal to the wireless probe 1, and the wireless probe 1 immediately starts synchronous acquisition. When each of them acquires the preset number of acquisition sample points N, the wireless probe 1 stops acquiring;

[0083] S106: The wireless probe 1 stops collecting, and translates the number of collected sample points N back to the preset number of advanced sampling points n0, and then sends the processed number of collected sample points N to the computer 4, which directly processes and obtains the detection results.

[0084] In S101, it should be particularly noted that the diameter of the drilled hole is greater than or equal to 100 mm, and the depth of the drilled hole is greater than or equal to 200 mm.

[0085] In S105, it should be noted that the wireless start-up transmitter 2 or the channel seismic signal is automatically triggered, and the triggering principle of the two is the same. That is, after data pre-collection, it is triggered when the received signal is greater than the preset level value. Because the number of pre-collected sample points is generally large, a rolling coverage continuous sampling method can be adopted, that is, a certain memory length (much larger than the synchronization error) is set, and the first-come-first-out is used repeatedly.

[0086] The technical solution of the present application, on the one hand, sets the acquisition component 133 and the vibration sensor component 11 to be independent and integrated, so as to avoid the existing cable connection being easily interfered by external electromagnetic waves and enhance the ability to collect extremely weak signals. On the other hand, the start trigger signal and the collected data are both transmitted wirelessly, so that there is no cable damage to affect the construction. After the data collection is completed, it is immediately digitized and stored and wirelessly transmitted without being interfered by the environment. In addition, since the computer 4 and the wireless probe 1 are connected by wireless transmission without cables, the computer 4 will not interfere with the data collection, simplifying the construction complexity, reducing the workload, and improving the ability to collect extremely weak signals and the detection efficiency. In addition, since the wireless probe 1 is buried in the borehole, it is not affected by the external environment, reducing external interference, improving the resolution of the collected data, and the sensor buried in the borehole is better coupled with the measured medium, making it easier to sense weak seismic signals.

[0087] Those skilled in the art should understand that the above embodiments can be provided as methods, devices, or computer program products. These embodiments can be in the form of complete hardware embodiments, complete software embodiments, or embodiments combining software and hardware. All or part of the steps in the methods involved in the above embodiments can be completed by instructing the relevant hardware through a program, and the program can be stored in a storage medium readable by a computer device for executing all or part of the steps of the methods of the above embodiments. Computer devices, including but not limited to: personal computers, servers, general-purpose computers, special-purpose computers, network devices, embedded devices, programmable devices, smart mobile terminals, smart home devices, wearable smart devices, in-vehicle smart devices, etc.; storage media, including but not limited to: RAM, ROM, disks, tapes, optical disks, flash memory, U disks, mobile hard disks, memory cards, memory sticks, network server storage, network cloud storage, etc.

[0088] The above embodiments are described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to the embodiments. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of the processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a computer device to generate a machine, so that the instructions executed by the processor of the computer device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0089] These computer program instructions may also be stored in a computer device readable memory capable of directing a computer device to operate in a specific manner, so that the instructions stored in the computer device readable memory produce a manufactured product including an instruction device, the instruction device implementing the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0090] These computer program instructions can also be loaded onto a computer device so that a series of operating steps are executed on the computer device to produce a computer-implemented process, whereby the instructions executed on the computer device provide for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0091] It should be noted that, although the above embodiments have been described in this article, the patent protection scope of the present invention is not limited thereby. Therefore, based on the innovative concept of the present invention, changes and modifications made to the embodiments described herein, or equivalent structures or equivalent process changes made using the contents of the present invention specification and drawings, directly or indirectly applying the above technical solutions to other related technical fields, are all included in the patent protection scope of the present invention.

Claims

1. A wireless advance detection system in a tunnel hole, characterized in that: include: At least one wireless probe, the wireless probe comprising a vibration sensing component, a first connector, a collection mechanism, a second connector, a push rod, an end cover, a data antenna, a start antenna and a spring piece, the vibration sensing component, the first connector, the collection mechanism, the second connector, the push rod and the end cover are sequentially connected in a horizontal direction, the data antenna and the start antenna are connected to the end cover in parallel, the collection mechanism comprises a collection shell and a bracket installed in the collection shell, a collection component, a power supply component and a wireless transmission component, the spring piece is installed on the collection shell, the collection component, the power supply component and the wireless transmission component are installed on the bracket, the collection component is connected to the vibration sensing component through the first connector, the wireless transmission component is sequentially connected to the data antenna and the start antenna through the second connector, the push rod and the end cover, and the power supply component supplies power to the vibration sensing component, the collection component and the wireless transmission component; A wireless start-up transmitter, the wireless start-up transmitter comprising a source and a wireless start-up transmitter, the source is connected to the wireless start-up transmitter, and the wireless start-up transmitter is wirelessly connected to the wireless probe; A wireless router, the wireless router is wirelessly connected to the wireless probe; A computer is wirelessly connected to the wireless router.

2. The wireless advance detection system in the tunnel hole according to claim 1 is characterized in that: The vibration sensor assembly includes a sensor housing, a first fixing seat, a first sensor, a second sensor and a second fixing seat, wherein the first fixing seat is installed in the sensor housing along the vertical direction, the second fixing seat is installed at the bottom of the sensor housing, the first sensor is installed on the first fixing seat, and the second sensor is installed on the second fixing seat.

3. The wireless advance detection system in the tunnel hole according to claim 2 is characterized in that: The first sensor includes a MEMS sensor circuit 1, a first-order filter circuit 1, a first-order filter circuit 2, a single-ended to differential circuit 1, a single-ended to differential circuit 2, an output X-axis differential signal P1P2, and an output Y-axis differential signal P3P4. The MEMS sensor circuit 1 includes an X-axis output component and a Y-axis output component. The X-axis output component, the first-order filter circuit 1, the single-ended to differential circuit 1, and the output X-axis differential signal P1P2 are connected in sequence. The Y-axis output component, the second first-order filter circuit, the single-ended to differential circuit 2, and the output Y-axis differential signal P3P4 are connected in sequence. The second sensor includes a second MEMS sensor circuit, a third first-order filter circuit, a fourth first-order filter circuit, a third single-ended to differential circuit, a fourth single-ended to differential circuit, an output ZX axis differential signal P5P6, and an output ZY axis differential signal P7P8. The second MEMS sensor circuit includes a ZX axis output component and a ZY axis output component. The ZX axis output component, the third first-order filter circuit, the third single-ended to differential circuit, and the output ZX axis differential signal P5P6 are connected in sequence. The ZY axis output component, the fourth first-order filter circuit, the fourth single-ended to differential circuit, and the output ZY axis differential signal P7P8 are connected in sequence. The output X-axis differential signal P1P2 corresponds to the differential positive signal X+ and the negative signal X- respectively, the output Y-axis differential signal P3P4 corresponds to the differential positive signal Y+ and the negative signal Y- respectively, the output ZX-axis differential signal P5P6 corresponds to the differential positive signal ZX+ and the negative signal ZX- respectively, and the output ZY-axis differential signal P7P8 corresponds to the differential positive signal ZY+ and the negative signal ZY- respectively.

4. The wireless advance detection system in tunnel hole according to claim 1 is characterized in that: The acquisition component includes an acquisition expansion board, a first acquisition module, a second acquisition module and a microcontroller module, and the first acquisition module, the second acquisition module and the microcontroller module are installed on the acquisition expansion board; The power supply assembly includes a battery housing, a battery pack, a protection board and a power module. The battery housing is provided with the battery pack and the protection board, and the power module is provided on the acquisition expansion board. The wireless transmission component includes a wireless data communication module and a wireless start receiving module.

5. The wireless advance detection system in the tunnel hole according to claim 4 is characterized in that: The first acquisition module includes a first signal processing circuit and a second signal processing circuit, the first signal processing circuit includes an amplifier circuit 1, an analog filter circuit 1, a buffer amplifier circuit 1, an acquisition circuit 1 and a signal switching circuit connected in sequence, and the second signal processing circuit includes an amplifier circuit 2, an analog filter circuit 2, a buffer amplifier circuit 2 and an acquisition circuit 2 connected in sequence; The second acquisition module includes a third signal processing circuit and a fourth signal processing circuit, wherein the third signal processing circuit includes a third amplifier circuit, a third analog filter circuit, a third buffer amplifier circuit, and a third acquisition circuit connected in sequence, and the fourth signal processing circuit includes a fourth amplifier circuit, a fourth analog filter circuit, a fourth buffer amplifier circuit, and a fourth acquisition circuit connected in sequence; The microcontrol module is connected to the signal switching circuit, the second acquisition circuit, the third acquisition circuit and the fourth acquisition circuit respectively.

6. The wireless advance detection system in the tunnel hole according to claim 4 is characterized in that: The acquisition mechanism also includes a start signal processing circuit, the wireless data communication module includes a wireless data communication interface circuit, a wireless data communication module power supply circuit and a wireless data transmission module, the wireless data communication interface circuit is connected to the micro-control module, and the wireless data communication module power supply circuit supplies power to the wireless data transmission module; The wireless start-up receiving module includes an analog receiving module, a start-up receiving battery monitoring circuit and a start-up receiving interface circuit. The start-up receiving battery monitoring circuit is connected to the power supply module through the start-up receiving interface circuit, and the start-up receiving interface circuit is connected to the start-up signal processing circuit.

7. The wireless advance detection system in the tunnel hole according to claim 6 is characterized in that: The startup signal processing circuit includes an amplifying and filtering circuit, a startup threshold setting circuit and a signal processing interface circuit. The amplifying and filtering circuit is connected to the startup threshold setting circuit, the startup threshold setting circuit is connected to the microcontroller module, and the signal processing interface circuit is connected to the power supply module.

8. The wireless advance detection system in tunnel hole according to claim 1, characterized in that: The wireless start transmitter includes a start mode selection circuit, an analog transmission module, a start transmission battery monitoring circuit, a transmission power interface circuit, a transmission battery and a transmitter power supply. The start mode selection circuit is connected to the analog transmission module, the start transmission battery monitoring circuit is connected to the transmission power interface circuit, the transmission power interface circuit is connected to the transmission battery, and the transmitter power supply supplies power for the start mode selection circuit, the analog transmission module and the source.

9. The wireless advance detection system in the tunnel hole according to claim 8, characterized in that: The seismic sources include hammer seismic sources, cannon seismic sources and active seismic sources. After being connected, the hammer seismic sources and the cannon seismic sources are connected to one of the interfaces of the start-up mode selection circuit, and the active seismic source is connected to the other interface of the start-up mode selection circuit.

10. A wireless advance detection method in a tunnel hole, characterized in that: The wireless advance detection system in a tunnel hole according to any one of claims 1 to 9 further comprises the following steps: S101: at a specified distance from the tunnel head along the horizontal direction, two or more boreholes are evenly distributed on the periphery of an arcuate plane perpendicular to the tunnel direction and parallel to the tunnel head plane, the distance between two adjacent boreholes is the same, the height of the borehole closest to the ground plane on the left side of the tunnel is the same as the height of the borehole closest to the ground plane on the right side of the tunnel, and at a specified horizontal distance from the two boreholes, two or more excitation points are evenly distributed along the horizontal direction, and the distance between two adjacent excitation points is the same; S102: After drilling all the holes, turn on the power switches of all the wireless probes to power on the switch of each wireless probe, and then use the push rod to align the wireless probe with the hole and push it to the bottom of the hole. At this time, it should be ensured that the X-axis of the sensor in the vibration sensor assembly of all the wireless probes always points horizontally to the head of the tunnel, and at the same time, the wireless probes tilted downward or vertically downward are reinforced to prevent the wireless probes from slipping; S103: After the wireless probe is installed, the computer sets parameters for the wireless probe before collecting data on site, the parameters including the number of signal collection samples N, the number of advanced sampling points n0, the sampling interval and the amplification gain. After the parameters of each component are set, the wireless probe and the wireless start-up transmitter send a "ready" signal to the computer, and wait for the wireless start-up transmitter to send a "collection" signal; S104: After receiving the "ready" signal from the wireless probe, the computer immediately sends a "collection" command to the wireless probe in a broadcasting manner, and then performs data pre-collection, that is, enters an advance continuous sampling state; S105: Then, when the earthquake source generates a trigger signal, the wireless start transmitting device immediately sends a trigger signal to the wireless probe, and the wireless probe immediately starts synchronous acquisition. When each of the wireless probes acquires a preset number of acquisition sample points N, the wireless probe stops acquiring; S106: The wireless probe stops collecting, and moves the number of collected sample points N back by the preset number of advanced sampling points n0, and then sends the processed number of collected sample points N to the computer, which directly processes and obtains the detection results.

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