Seismic data acquisition station, seismic data acquisition unit and connection device

Abstract

The application relates to a seismic data acquisition station, a seismic data acquisition unit and a connecting device. The seismic data acquisition unit is detachably connected with an external geophone through the connecting device and comprises a shell, a power supply assembly arranged in the shell and a seismic data acquisition circuit board arranged in the shell and connected with the power supply assembly and connectable with the external geophone. The seismic data acquisition unit has the advantages that the power supply assembly is arranged in the shell and connected with the seismic data acquisition circuit board, the power supply is not required to be externally connected with a battery pack, the switching between a data acquisition mode and a data download working mode can be realized without disconnecting the power supply assembly, and the operation is simple and the power supply reliability is high.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of seismic exploration technology, and more particularly to a seismic data acquisition station, a seismic data acquisition unit and a connecting device. BACKGROUND

[0002] In the related art, a seismic data acquisition station with an external geophone usually has an external battery pack for power supply. The acquisition unit of the acquisition station generally has two ports. One port is connected to the external battery pack for power supply in a data acquisition mode and is connected to a data download rack for downloading the acquired seismic data in a data download mode. The other port is a geophone-specific interface, and the external geophone is connected in the data acquisition mode. The seismic data acquisition station in the related art usually needs to disconnect the external battery or disconnect the download rack to switch between the data acquisition mode and the data download mode, which is relatively cumbersome.

[0003] In addition, the external geophone is connected to the geophone through a cable. The cable for connecting the geophone is often bent during use. Frequent bending can easily cause the internal multiple metal wires of the cable to be disconnected, which affects the normal data acquisition of the data acquisition station. The service life of the cable is short, and the bending life is about 300 times. In addition, the cable may be crushed by heavy objects or bitten by small animals such as mice during field arrangement, which can cause the internal wires of the cable to be exposed and leak or break.

[0004] The connection cable of the external battery of the acquisition station may also be bent, which can cause unstable power supply or even power failure of the acquisition station. SUMMARY

[0005] The technical problem to be solved by the present application is to provide an improved seismic data acquisition unit, further provide an improved connecting device for the seismic data acquisition unit and the geophone, and further provide an improved seismic data acquisition station.

[0006] The technical solution adopted by the present application to solve the technical problem is: a seismic data acquisition unit is constructed, which can be detachably connected to an external geophone through a connecting device, and includes a shell, a power supply component built in the shell, and a seismic data acquisition circuit board arranged in the shell and connected to the power supply component and connectable to the external geophone.

[0007] Preferably, the shell is provided with a socket assembly connected to the seismic data acquisition circuit board and detachably connected to a plug assembly of the connecting device;

[0008] The shell is also provided with a plug-in port detachably connected to an external download rack; the plug-in port includes a plurality of pin insertion needles connected to the seismic data acquisition circuit board;

[0009] The seismic data acquisition unit further comprises a dustproof cover assembly detachably arranged at the plug-in port.

[0010] Preferably, the seismic data acquisition unit further comprises a first waterproof sealing structure, the shell comprises an upper cover and a lower shell matched with the upper cover; the first waterproof sealing structure is arranged between the upper cover and the lower shell.

[0011] And / or, the seismic data acquisition unit further comprises a second waterproof sealing structure arranged in the plug-in port.

[0012] And / or, the seismic data acquisition unit further comprises a third waterproof sealing structure arranged between the dustproof cover assembly and the plug-in port.

[0013] And / or, the seismic data acquisition unit further comprises a mounting bracket arranged in the shell for mounting the power supply assembly.

[0014] And / or, further comprising a first shock-absorbing pad between the seismic data acquisition circuit board and the bottom surface of the upper cover.

[0015] And / or, the seismic data acquisition unit comprises a second shock-absorbing pad between the power supply assembly and the lower shell.

[0016] And / or, the seismic data acquisition unit comprises a switch for turning on or off the power supply assembly.

[0017] Preferably, the lower shell is an aluminum shell.

[0018] And / or, the seismic data acquisition circuit board and the plug-in port are conductively connected through a flexible wire circuit board.

[0019] And / or, a foolproof structure is arranged between the dustproof cover assembly and the plug-in port; the dustproof cover assembly comprises a cover body; the foolproof structure comprises a conductive sheet arranged in the cover body to short-circuit at least two of the lead-out pins on the plug-in port when the dustproof cover assembly and the plug-in port are mounted in place.

[0020] And / or, the seismic data acquisition unit comprises a detection circuit for detecting whether the dustproof cover assembly is mounted in place with the plug-in port and a first prompting device connected with the detection circuit to send a reminder signal when the dustproof cover assembly is not mounted in place.

[0021] And / or, the seismic data acquisition unit comprises a leakage detection circuit for detecting whether the geophone is leaking and a second prompting device connected with the leakage detection circuit to send a reminder signal when the geophone is leaking.

[0022] And / or, the seismic data acquisition circuit board is provided with a transmission unit for transmitting monitoring information of the seismic data acquisition station.

[0023] Preferably, the detection circuit comprises a detection chip and a switch, the detection chip comprises a detection input pin IN and a detection output pin OUT connected with two of the plurality of lead pin needles, and the switch is arranged between the detection chip and the plurality of lead pin needles and is connected or disconnected with the two lead pin needles according to the control of the detection chip;

[0024] When the dust cover assembly is not installed in place, the detection chip detects that the signal of the detection input pin IN is high level;

[0025] When the dust cover assembly is installed in place, at least two of the lead pin needles are short-circuited, and the detection chip detects that the signal of the detection input pin IN is low level;

[0026] The leakage detection circuit comprises a leakage detection chip, a data acquisition module connected with the leakage detection chip, a first connection lead wire connected with the data acquisition module and the detector, a second connection lead wire connected with the data acquisition module and the detector, a first switch and a second switch arranged side by side on the first connection lead wire, a third switch and a fourth switch arranged side by side on the second connection lead wire, a test line connected with the first connection lead wire and located between the first switch and the second switch, a resistor arranged on the test line, a fifth switch arranged on the test line and located between the resistor and the first switch, and a grounding line connected with the fourth switch;

[0027] When the detector is not leaking, the resistance voltage drop is zero, and the voltage detected by the data acquisition module is equal to the test DC power supply voltage of the test line;

[0028] When the detector is leaking, the resistor generates a voltage drop, and the voltage detected by the data acquisition module is less than the test DC power supply voltage of the test line.

[0029] Preferably, the dust cover assembly further comprises a silica gel seat which can be inserted into the cover body and assembled with the cover body;

[0030] The silica gel seat is provided with a jack hole for corresponding insertion of the lead pin needle and preventing the cover body from rotating to drive the silica gel seat to rotate;

[0031] The plug-in port is provided with a anti-collision assembly which surrounds at least part of the periphery of the lead pin needle and is annular.

[0032] The application also discloses a connecting device of a seismic data acquisition unit and a geophone.

[0033] Preferably, the protective assembly comprises a plurality of wire protection rings in a circular ring shape which are arranged equidistantly on the cable body.

[0034] The wire protection ring is a rubber wire protection ring, a silica gel wire protection ring or a plastic wire protection ring.

[0035] Preferably, the plug assembly comprises a plug which is connected with a socket assembly of the seismic data acquisition unit.

[0036] Preferably, the joint assembly comprises a joint which is detachably connected with the geophone.

[0037] The plug comprises a mounting seat and a plug connector which is arranged protruding from an end surface of the mounting seat and is connected with the seismic data acquisition unit.

[0038] Preferably, the joint is a threaded joint.

[0039] The plug further comprises a fastener which is arranged penetrating through the mounting seat and is fixedly connected with the socket assembly of the seismic data acquisition unit.

[0040] The application also discloses a seismic data acquisition station which comprises the seismic data acquisition unit and the connecting device of the seismic data acquisition unit and the geophone.

[0041] The seismic data acquisition station, the seismic data acquisition unit and the connecting device have the following advantages: the power supply assembly is arranged in the shell and is connected with the seismic data acquisition circuit board, so that the seismic data acquisition unit can be powered without an external battery pack, and the seismic data acquisition unit can switch between a data acquisition mode and a data download mode without disconnecting the power supply assembly, thereby being simple to operate and having high power supply reliability.

[0042] The connecting device of the seismic data acquisition unit and the geophone is arranged with the protective assembly on the cable body, so that the bending radius of the cable body is increased and the cable body is protected, thereby avoiding the exposure of internal wires of the cable due to damage of the cable, preventing electric leakage or disconnection, improving the safety and service life of the cable.

[0043] The seismic data acquisition station has the advantages of simple operation, high power supply reliability, high safety and long service life by setting the seismic data acquisition unit and the connecting device. BRIEF DESCRIPTION OF DRAWINGS

[0044] The application will be further described below in conjunction with the drawings and embodiments. In the drawings:

[0045] Figure 1 is a structural exploded view of the seismic data acquisition station in some embodiments of the application;

[0046] Figure 2 is Figure 1 a partial sectional view of the seismic data acquisition station shown in the figure;

[0047] Figure 3 is Figure 1 a schematic diagram of the working principle of the detection circuit of the seismic data acquisition station shown in the figure;

[0048] Figure 4 is Figure 1 a schematic diagram of the working principle of the leakage detection circuit of the seismic data acquisition station shown in the figure. DETAILED DESCRIPTION

[0049] In order to have a clearer understanding of the technical features, objects and effects of the application, the specific embodiments of the application will be described in detail with reference to the drawings.

[0050] Figure 1 Some preferred embodiments of the seismic data acquisition station of the application are shown. The seismic data acquisition station can be used to acquire seismic data, and has the advantages of simple operation, high power supply reliability, high safety and long service life.

[0051] As Figure 1 shown, the seismic data acquisition station can include a seismic data acquisition unit 10 and a connecting device 20. The seismic data acquisition unit 10 can be detachably connected with an external geophone through the connecting device 20, which can acquire data of the geophone and further acquire seismic data. The connecting device 20 can be used to connect the seismic data acquisition unit 10 and the geophone, so as to electrically and mechanically connect the seismic data acquisition unit 10 and the geophone, so as to facilitate data transmission between the geophone and the base data acquisition 10.

[0052] Further, in some embodiments, the seismic data acquisition unit 10 can include a housing, a power supply assembly 12 and a seismic data acquisition circuit board 13. The housing can be used to accommodate the power supply assembly and the seismic data acquisition circuit board 13. The power supply assembly can be built-in in the housing, and it can be connected with the seismic data acquisition circuit board 13, which can be used to supply power to the geophone. By building-in the power supply assembly, power supply can be achieved without external battery pack, and switching between data acquisition mode and data download mode can be achieved without disconnecting the power supply assembly, which has the advantages of simple operation and strong power supply reliability. The seismic data acquisition circuit board 13 is arranged in the housing, and can be connected with the external geophone and the power supply assembly 12, which can be used to acquire data of the geophone, and further acquire seismic data.

[0053] Further, in some embodiments, the housing includes an upper cover 111 and a lower shell 112. The upper cover 111 can be a cuboid structure, and an opening can be formed on the top surface thereof, and an accommodation cavity can be formed on the inner side thereof and communicate with the opening. The lower shell 112 can be matched with the upper cover 111, and the lower shell 112 can cover the upper cover 111

[0054] In some embodiments, the upper cover 111 can be made of plastic or metal material, and specifically, in some embodiments, the upper cover 111 can be made of nylon. The lower shell 112 can be made of metal material, and in some embodiments, the lower shell 112 can be an aluminum shell, which has conductivity, and can guide high voltage generated by lightning to the ground in lightning weather through the external geophone cable, thereby avoiding damage to the seismic data acquisition station caused by lightning.

[0055] Further, in some embodiments, the housing is provided with a socket assembly 1111 and a plug-in port 1112. Specifically, in some embodiments, the socket assembly 1111 and the plug-in port 1112 are arranged on the upper cover 111, and the socket assembly 1111 can be arranged on one side of the upper cover 111, which is a DCK socket assembly, and can be connected with the seismic data acquisition circuit board 13 and detachably connected with the connecting device 20. Specifically, in some embodiments, the socket assembly 1111 can be plugged by the socket assembly 22 of the connecting device 20, and thereby the external geophone can be connected through the connecting device 20. In some embodiments, the socket assembly 1111 can be connected with the seismic data acquisition circuit board 13 through internal guide. By detachably connecting the socket assembly 1111 with the connecting device 20, the arrangement and maintenance of the seismic data acquisition unit 10 can be facilitated. The plug-in port 1112 can be arranged on the other side of the upper cover 111, and is arranged opposite to the socket assembly 1111. The plug-in port 1112 can be used to detachably connect with the external download rack, and specifically, it can be detachably connected with the download rack through a data line, so as to facilitate data transmission to the download rack.

[0056] In some embodiments, the plug-in port 1112 can include a plurality of lead pins 1113, which in some embodiments can include data line lead pins, test line lead pins, and charging line lead pins. The data line lead pins can be connected to the download rack, which can be used for data transmission and download. The test line lead pins can be used to connect external testers for external testers to check and test the channel indicators of the seismic data acquisition unit 10. The charging line lead pins can be connected to the power supply component 12 inside the seismic data acquisition unit 10, and the power supply component can be charged by an external charging device. In some embodiments, the plug-in port 1112 can be electrically connected to the seismic data acquisition circuit board 13 through a flexible printed circuit (FPC) 16. The plug-in port 1112 can be connected to a data download, charging, and testing AIO download rack, and can simultaneously perform data download, charging, and channel testing of the acquisition station. When the AIO download rack downloads seismic acquisition data at high speed, the plug-in port 1112 can use a USB3.0 interface to convert to optical fiber, and can simultaneously charge the power supply component inside the acquisition station using a three-stage constant-current constant-voltage rapid charging method, test the acquisition channels of the acquisition station, use a USB2.0 interface to test the channel characteristics of the seismic data acquisition unit 10, and use one AIO download rack to simultaneously perform data download, charging, and testing operations on 48 seismic data acquisition units 10, thereby improving the work efficiency of the exploration site.

[0057] Further, in some embodiments, a second waterproof sealing structure can also be provided in the plug-in port 1112; the second sealing structure can be a waterproof sealing ring, and specifically, in some embodiments, the waterproof sealing ring can be a silica gel ring, which can be used to prevent dust and water vapor from entering the plug-in port 1112, thereby causing poor contact of the plug-in port 1112.

[0058] Further, in some embodiments, the plug-in port 1112 is provided with an anti-collision assembly 1114 on the end face of the pin plug 1113. In some embodiments, the anti-collision assembly 1114 can include an anti-collision outer ring and an anti-collision bone; the anti-collision outer ring can surround at least part of the periphery of the pin plug 1113, and in some embodiments, it can surround the periphery of the four middle pin plugs 1113. Of course, it can be understood that in other embodiments, it can surround the periphery of all pin plugs. The anti-collision bone can be protrudingly arranged on the inner wall of the anti-collision outer ring, which can be multiple, and in some embodiments, it can be four. The height of the anti-collision bone can be higher than the protruding length of the pin plug 1113, which can prevent the pin plug 1113 from being damaged by external objects when the plug-in port 1112 is open. In some embodiments, the four pin plugs 1113 in the anti-collision assembly 1114 on the plug-in port 1112 can be used for detection, and through the switch conversion connection end, it can also be used for data download or charging, and the pin plug 1113 outside the anti-collision assembly 1114 can be used for data download, charging, and testing.

[0059] In some embodiments, the cross-sectional shape and size of the lower shell 112 can be matched with the cross-sectional shape and size of the upper cover 111, and they are detachably connected through the connection assembly 113. In some embodiments, the connection assembly 113 can be a fastening screw. In some embodiments, the lower shell 112 can be provided with a via hole, which can be multiple, and the multiple via holes can be arranged along the circumference of the lower shell 112. The lower cover 111 can be provided with a screw hole, which can be multiple, and it can be arranged corresponding to the via hole. The fastening screw can pass through the via hole and enter the screw hole to be screwed with the screw hole, thereby detachably connecting the lower shell 112 and the upper cover 111.

[0060] In some embodiments, the power supply assembly 12 can be a battery pack with long endurance time, which can supply power to the data acquisition circuit board 13. Specifically, in some embodiments, it can be four 21700 cylindrical lithium batteries arranged side by side. Of course, it can be understood that it can also be multiple 18650 cylindrical lithium batteries. It can be understood that in other embodiments, the power supply assembly 12 is not limited to including four batteries, and it is not limited to being the same model of battery.

[0061] In some embodiments, the seismic data acquisition circuit board 13 is provided with a high-precision analog-to-digital converter (ADC), a GPS positioning module, and a time synchronization function, etc., and it has a leakage self-checking function.

[0062] In some embodiments, the seismic data acquisition unit 10 further comprises a switch. The switch can be disposed on the housing, which can be connected with the seismic data acquisition circuit board 13, and which can be used to turn on or turn off the power supply assembly 12. In some embodiments, the switch can be a magnetic power switch. The magnetic power switch can control the power supply of the seismic data acquisition circuit board 13 through a magnetic piece, thereby changing the working state of the acquisition station. It can be understood that in other embodiments, the magnetic power switch can be omitted.

[0063] In some embodiments, the seismic data acquisition station further comprises a mounting bracket 14. The mounting bracket 14 can be disposed in the housing, specifically, it can be mounted in the lower cover 111, and it can be used to mount the power supply assembly 12. The mounting bracket 14 can be disposed on the seismic data acquisition circuit board 13 and connected with the seismic data acquisition circuit board 13 through connecting wires, or connected with the seismic data acquisition circuit board 13 through plug-in terminals. The mounting bracket 14 can be made of insulating material. In some embodiments, it can be made of plastic material, specifically, it can be made of nylon material. In some embodiments, an accommodation cavity can be formed on the inside of the mounting bracket 14 to accommodate the power supply assembly 12. In some embodiments, the mounting bracket 14 is not limited to being compatible with one capacity or one type of battery, but can be compatible with multiple different capacities or types of batteries. When the size of the battery is smaller than the size of the accommodation cavity, a gasket can be provided to fix it in the accommodation cavity. The mounting bracket 14 can also be made into a structure with an adjustable size of the accommodation cavity to accommodate batteries of different sizes. It can be understood that in other embodiments, the mounting bracket 14 can be omitted.

[0064] Further, in some embodiments, the seismic data acquisition station further comprises a first shock-absorbing pad 15. The first shock-absorbing pad 15 can be disposed in the housing between the seismic data acquisition circuit board 13 and the bottom surface of the upper cover 111. The first shock-absorbing pad 15 can be a silica gel pad. Of course, it can be understood that in other embodiments, the first shock-absorbing pad 15 can not be limited to a silica gel pad. It can be understood that in some embodiments, the first shock-absorbing pad 15 can be omitted.

[0065] Further, in some embodiments, the seismic data acquisition station further comprises a second shock-absorbing pad. The second shock-absorbing pad can be disposed in the housing between the power supply assembly 12 and the lower shell 112, which can avoid damage to the battery caused by vibration of the seismic data acquisition unit 10. In some embodiments, the second shock-absorbing pad can be a silica gel pad. It can be understood that in some embodiments, the second shock-absorbing pad can be omitted.

[0066] Furthermore, in some embodiments, the seismic data acquisition unit 10 may also include a first waterproof sealing structure 17. The first waterproof sealing structure 17 may be disposed between the upper cover 111 and the lower shell 112. In some embodiments, the first waterproof sealing structure 17 may be a waterproof sealing ring, which may be fitted onto the side of the lower shell 112 opposite to the upper cover 111. Specifically, in some embodiments, the waterproof sealing ring may be a silicone waterproof ring. It is understood that in other embodiments, the waterproof sealing ring may be omitted.

[0067] like Figure 1 and Figure 2 As shown, in some embodiments, the seismic data acquisition unit 10 further includes a dust cover assembly 18 and a third waterproof sealing structure 19. The dust cover assembly 18 is detachably connected to the plug-in port 112, covering the port 1112 to prevent dust and moisture from entering and to prevent oxidation, corrosion, and rusting of the pins in the port 1112, thereby preventing poor contact. The dust cover assembly 18 can be screwed into the plug-in port 112. The third waterproof sealing structure 19 can be disposed between the dust cover assembly 18 and the plug-in port 1112, sealing the connection between them. In some embodiments, the third waterproof sealing structure 19 can be a sealing ring, which can be fitted onto the dust cover assembly 18.

[0068] In some embodiments, the dustproof cover assembly can include a cover body 181 and a silica gel seat 182. The cover body 181 can be in a cylindrical shape, and the inner side thereof can be a hollow structure. The cover body 181 can include a plug-in portion connected to the plug-in port 1112 and a control portion arranged at one end of the plug-in portion. The outer diameter of the control portion can be greater than the outer diameter of the plug-in portion. The outer side wall of the plug-in portion is provided with external threads that are screwed with the internal threads of the inner side of the plug-in port 1112. The silica gel seat 182 can be arranged in the cover body 181 and can be detachably connected to the cover body 181. The cross section of the silica gel seat 182 can be in a cylindrical shape, and the cross-sectional dimension thereof can be smaller than the cross-sectional dimension of the cover body 181. The silica gel seat 182 can be provided with insertion holes 1821 for the insertion of the pin-shaped pins 1113 in the plug-in port 1112. The insertion holes 1821 can be a plurality of holes arranged corresponding to the pin-shaped pins 1113, which can protect the pin-shaped pins 1113 from being directly exposed to the air and reduce the chance of corrosion and oxidation of the pin-shaped pins 1113. The insertion holes 1821 can be round holes. During the process of tightening the cover body 181, the pin-shaped pins 1113 can be inserted into the insertion holes 1821, thereby preventing the silica gel seat 182 from rotating with the cover body 181. The cover body 181 can press the silica gel seat 182 forward, so that the conductive sheet 183 in the silica gel seat 182 will not rotate with the cover body 181, thereby avoiding friction between the pin-shaped pins 1113 in contact with the conductive sheet 183, causing wear of the pin-shaped pins 1113, leading to poor electrical contact between the pins and the conductive sheet, and affecting the reliability of the foolproof detection. In some embodiments, the anti-collision assembly can be inserted into the silica gel seat 82 along with the pin-shaped pins 1113. Specifically, the silica gel seat 82 is provided with an annular insertion slot located at the periphery of the conductive sheet 183. By assembling the anti-collision assembly with the silica gel seat 82, friction between the pin-shaped pins 1113 in contact with the conductive sheet 183 can also be avoided, causing wear of the pin-shaped pins 1113, leading to poor electrical contact between the pins and the conductive sheet, and affecting the reliability of the foolproof detection.

[0069] In some embodiments, a foolproof structure can be arranged between the dustproof cover assembly 18 and the plug-in port 1112. Specifically, the foolproof structure can be arranged in the cover body 181. In some embodiments, the foolproof structure can include a conductive sheet 183. The conductive sheet 183 can be a metal conductive sheet. Alternatively, the conductive sheet 183 can be a stainless steel conductive sheet. The conductive sheet 183 can be arranged in the silica gel seat 182, located at the passage between two adjacent insertion holes, and the two ends thereof can extend to the two adjacent insertion holes, respectively. The conductive sheet 183 can short-circuit at least two pin-shaped pins 1113 on the plug-in port 1112 when the dustproof cover assembly 18 and the plug-in port 1112 are installed in place. Specifically, the conductive sheet 183 can short-circuit four pin-shaped pins 1113.

[0070] As Figure 3As shown, further, in some embodiments, the seismic data acquisition unit 10 further comprises a detection circuit and a first prompting device. The detection circuit and the first prompting device can be arranged on the seismic data acquisition circuit board 13. The detection circuit can be used to detect whether the dustproof cover assembly 18 is installed in place with the plug-in port 1112. The first prompting device can be connected with the detection circuit, which can send a prompt signal when the dustproof cover assembly 18 is not installed in place.

[0071] In some embodiments, the detection circuit can include a detection chip and a switch. The detection chip can include a detection input pin IN and a detection output pin OUT; the detection input pin IN and the detection output pin OUT can be connected with at least two pin-out pins 1113 of the plurality of pin-out pins 1113, specifically, the detection input pin IN and the detection output pin OUT can be two respectively, and can be arranged corresponding to four pin pins 1113. One end of the detection input pin IN can be connected with an internal pull-up resistor of the detection chip, and the other end can be arranged as suspended, and one end of the detection output pin OUT can be arranged as suspended. The other end of the pull-up resistor can be connected with a power supply. It should be noted that the detection chip can be an STM32Fxxx chip, which can detect the signal of the detection input pin IN in a time manner, specifically, the logic level of the detection input pin IN is detected, and the detection output pin OUT is low during detection. The switch can be a double linkage switch or a four linkage switch, which can be arranged between the four pin-out pins 1113 of the plurality of pin-out pins 1113 and the detection chip, and can be connected or disconnected with the detection input pin IN and the detection output pin OUT and the pin-out pin 1113 according to the control of the detection chip. When the dustproof cover assembly 18 is installed on the plug-in port 1112, the switch can execute the control instruction of the detection chip to connect the detection input pin IN and the detection output pin OUT with the four pin-out pins 1113. It can be understood that in other embodiments, the conductive sheet 183 is not limited to short-circuiting the four pin-out pins 1113, but also can short-circuit two or more pin-out pins.

[0072] When the dust cover assembly 18 is not properly installed, the detection input pin IN is floating. The detection chip detects a high level signal at the detection input pin IN, meaning the logic level of the detection input pin IN is high. Therefore, when the detection chip detects a high level signal at the detection input pin IN, it can be determined that the dust cover assembly 18 is not properly installed, i.e., the dust cover assembly 18 is not tightened. At this time, the seismic data acquisition unit 10 cannot perform data acquisition. A reminder signal can be issued through the first prompting device to remind the operator to tighten the dust cover assembly 18. When the dust cover assembly 18 is installed in place, at least two pins 1113 on the inner side of the anti-collision assembly 1114 are connected to the conductive sheet 183, thereby shorting the detection input pin IN and the detection output pin OUT. The detection output pin OUT outputs a low level at regular intervals, and the signal of the detection input pin IN is the output signal of the detection output pin OUT. When the detection chip detects that the signal of the detection input pin IN is low, that is, the logic level of the detection input pin IN is low, it can be determined that the dust cover assembly 18 is installed in place, that is, the dust cover assembly 18 is tightened with the plug-in port 1112. At this time, the earthquake data acquisition unit 10 can enter the data acquisition state. When the dust cover assembly 18 is installed in place and all four pins 1113 inside the anti-collision assembly 1114 are short-circuited, the dust cover assembly 18 is properly tightened. If only any two pins are short-circuited after the dust cover assembly 18 is tightened, it means that the dust cover assembly 18 is tightened at an angle (it is possible that the threads on the dust cover assembly 18 or the inner wall of the plug port 1112 will wear out after long-term use, and the dust cover assembly 18 may be tightened when it is at an angle). In this case, data acquisition is not required.

[0073] In some embodiments, the first alerting device may be an LED indicator light, which can be connected to the detection chip and can flash to indicate that the dust cover assembly 18 is not in place. It is understood that in some embodiments, the detection circuit and the first alerting device may be omitted.

[0074] like Figure 4 As shown, in some embodiments, the seismic data acquisition unit 10 may further include a leakage current detection circuit and a second alerting device. The leakage current detection circuit can be disposed on the seismic data acquisition circuit board 13 and can be used to detect whether the detector is leaking current. The second alerting device can issue a warning signal when the detector is leaking current. By using an aluminum shell for the lower cover, when deployed in the field and encountering thunderstorms, the high voltage generated by lightning strikes can be conducted to the ground, preventing the high voltage from lightning strikes from entering the seismic data acquisition unit 10 through the connecting device 20 and damaging the seismic data acquisition circuit board 13 during a lightning strike.

[0075] In some embodiments, the electric leakage detection circuit can include an electric leakage detection chip, a data acquisition module, a first connecting wire, a second connecting wire, a first switch K1, a second switch K3, a third switch K2, a fourth switch K4, a test line, a resistor R, a fifth switch K5, and a ground wire. The electric leakage detection chip can be an STM32F4xx chip, which can be used for processing data. The data acquisition module can be connected to the electric leakage detection chip as an ADC data acquisition module. Specifically, it can include an ADS12xx single-chip microcomputer. The seismic signals collected by the detector are sent to the ADC data acquisition module shell, amplified by the ADS12xx single-chip microcomputer, ADC converted, and then sent to the STM32F4xx chip for processing. The first connecting wire and the second connecting wire can be connected to the data acquisition module and the detector. Specifically, the first connecting wire and the second connecting wire can be connected to the socket assembly 1111 and connected to the detector through the connecting device 20. The first switch K1 and the second switch K3 can be arranged on the first connecting wire, and they can be arranged side by side. The first switch K1 is located on the side close to the detector. The third switch K2 and the fourth switch K4 can be arranged on the second connecting wire, and they are arranged side by side. The third switch K2 is located on the side close to the detector. The test line is connected to the first connecting wire, and the connection node is located between the first switch K1 and the second switch K3. The resistor R can be arranged on the test line. The fifth switch K5 can be arranged on the test line and located between the resistor R and the first switch K1. The ground wire can be connected to the fourth switch K4.

[0076] When collecting seismic data, the first switch K1, the second switch K3, and the third switch K2 can be closed. The fourth switch K4 is connected to the detector and disconnected from the shell. The fifth switch K5 is disconnected. The seismic signals collected by the detector are sent to the ADC data acquisition module shell, amplified by the ADS12xx single-chip microcomputer, ADC converted, and then sent to the STM32F4xx chip for processing.

[0077] When the leakage detection of the external geophone is needed in the field arrangement, the first switch K1 and the second switch K3 are closed, the third switch K2 is disconnected, one end of the geophone is opened, the fourth switch K4 is connected to the shell ground, the second connecting wire is disconnected with the geophone, the fifth switch K5 is closed, the DC power voltage V+ on the test line is applied to the other end of the geophone through the resistance R, the fifth switch K5 and the first switch K1. When the geophone is well insulated, the geophone is not leaked, the resistance R is zero, and the data acquisition module of the data acquisition unit detects that the voltage at the switch K3 is equal to the test DC power voltage V+ of the test line. When the geophone is leaked, there is a current from the DC power output, flowing through the resistance R, the switches K5 and K1 to the geophone. The insulation resistance R of the geophone is reduced or the insertion assembly 1111 of the geophone is waterlogged, causing the insulation resistance R to be reduced. The leakage current enters the ground through the geophone leakage, flows into the switch K4 through the lower shell 112 of the seismic data acquisition unit 10, and forms a loop, so that the resistance R generates a voltage drop. The data acquisition module detects that the voltage at the switch K3 is less than the test DC power voltage V+ of the test line. At this time, the leakage of the external geophone will affect the normal seismic data acquisition of the seismic data acquisition unit 10, so that the second prompt device can issue a leakage reminder signal.

[0078] In some embodiments, the second prompt device can be an LED indicator light, which can be connected with the leakage detection chip of the leakage detection circuit. When the geophone is leaked, the LED indicator light can issue a reminder signal by flashing. In some embodiments, the second prompt device and the first prompt device can be the same. In some embodiments, the second prompt device can be omitted.

[0079] Further, in some embodiments, the seismic data acquisition unit 10 can further include a transmission unit. The transmission unit can be arranged on the seismic data acquisition circuit board 13 and can transmit monitoring information for monitoring the seismic data acquisition unit 10. In some embodiments, the transmission unit can be a Bluetooth or an LED indicator light. The seismic data acquisition unit 10 can transmit the acquisition data quality monitoring information through the Bluetooth iBeacon broadcast mode or the Bluetooth transparent transmission mode, or through the different colors and different flashing modes of the LED indicator light.

[0080] For example Figure 1As shown, the connecting device 20 can include a cable body 21, a plug assembly 22, a joint assembly 23, and a protection assembly 24. Both ends of the cable body 21 are detachably arranged. Once the cable body 21 is damaged, a new cable can be directly replaced, thereby saving maintenance time and improving on-site work efficiency. The plug assembly 22 is detachably arranged at one end of the cable body 21 and connected with the seismic data acquisition unit 10. Specifically, the plug assembly 22 can be plugged with the socket assembly 1111 on the seismic data acquisition unit 10. The joint assembly 23 is detachably arranged at the other end of the cable body 21 and can be detachably connected with an external geophone. The protection assembly 24 can be sleeved on the cable body 21 and can be used to increase the bending radius of the cable body 21 and protect the cable body 21, thereby prolonging the service life of the cable body 21, improving the anti-rolling performance, and preventing cable breakage caused by mouse bites.

[0081] Further, in some embodiments, the plug assembly 22 can include a plug 221 and a first connecting piece 222. The plug 221 can be connected with the socket assembly 1111 of the seismic data acquisition unit 10. The first connecting piece 222 can be arranged at one side of the plug 221 and can be used to connect the cable body 21. The plug 221 can include a mounting seat 2211 and a plug-in piece 2212. The mounting seat 2211 can be used to mount the plug-in piece 2212 and can be partially inserted into the socket assembly 1111. The plug-in piece 2212 can be protrusively arranged from the end face of one end of the mounting seat 2211 and can be used to connect with the seismic data acquisition unit 10. Specifically, the plug-in piece 2212 can be plugged with the socket assembly 1111. The plug 221 can be connected and fixed with the socket assembly 1111 by arranging a fastener 25. The mounting seat 2211 can be provided with a mounting via 2213. The fastener can be a fastening screw. The fastening screw can be connected and fixed with the socket assembly 1111 by passing through the mounting via 2213 of the mounting seat 2211.

[0082] Further, in some embodiments, the joint assembly 23 can include a joint 231 and a second connecting piece 232. In some embodiments, the joint 231 can be a threaded joint and can be screwed with an external geophone. The second connecting piece 232 can be arranged at one end of the joint 231 and can be used to connect the cable body 21.

[0083] Further, in some embodiments, the protection assembly 24 can include a plurality of wire protection rings. The plurality of wire protection rings can be sleeved on the cable body 21 and equidistantly arranged, which can increase the bending radius of the cable body 21 when the cable body 21 is bent, reduce the tensile strength of the internal metal wires of the cable body 21 due to bending, prolong the service life, and increase the bending life of the cable body 21 after the wire protection rings to more than 3000 times. Increasing the wire protection rings can also improve the anti-rolling performance and prevent the cable from being broken due to the tearing of small animals such as mice. In some embodiments, the wire protection rings can be rubber wire protection rings. It can be understood that in other embodiments, the wire protection rings can not be limited to rubber wire protection rings, but can be silicone wire protection rings or plastic wire protection rings.

[0084] It can be understood that the above embodiments only express the preferred embodiments of the present application, which are described in detail and specifically, but cannot be understood as a limitation on the scope of the patent of the present application; it should be noted that for ordinary skilled in the art, the above technical features can be freely combined without departing from the concept of the present application, and several modifications and improvements can be made, which all belong to the protection scope of the present application; therefore, any equivalent transformation and modification within the scope of the claims of the present application should belong to the scope of the claims of the present application.

Claims

1. A seismic data acquisition unit, detachably connectable to an external geophone via a connecting device, characterized in that, The seismic data acquisition unit comprises a shell, a power supply assembly (12) arranged in the shell, and a seismic data acquisition circuit board (13) arranged in the shell and connected with the power supply assembly (12) and connectable with an external detector; The shell is provided with a socket assembly (1111) connected with the seismic data acquisition circuit board (13) and detachably connected with a plug assembly (22) of the connecting device (20); the shell is further provided with a plug-in port (1112) detachably connected with an external downloading rack; The plug-in port (1112) comprises a plurality of lead pins (1113); the plurality of lead pins (1113) comprise data line lead pins, test line lead pins and charging line lead pins.

2. The seismic data acquisition unit of claim 1, wherein, The seismic data acquisition unit further comprises a dustproof cover assembly (18) detachably arranged at the plug-in port (1112).

3. The seismic data acquisition unit of claim 2, wherein, The seismic data acquisition unit further comprises a first waterproof sealing structure (17); the shell comprises an upper cover (111) and a lower shell (112) matched with the upper cover (111); the first waterproof sealing structure (17) is arranged between the upper cover (111) and the lower shell (112); And / or, the seismic data acquisition unit further comprises a second waterproof sealing structure arranged in the plug-in port (1112); And / or, the seismic data acquisition unit further comprises a third waterproof sealing structure (19) arranged between the dustproof cover assembly (18) and the plug-in port (1112); And / or, the seismic data acquisition unit further comprises a mounting bracket (14) arranged in the shell for mounting the power supply assembly (12); And / or, further comprising a first shock-absorbing pad (15) between the seismic data acquisition circuit board (13) and the bottom surface of the upper cover (111); And / or, the seismic data acquisition unit comprises a second shock-absorbing pad between the power supply assembly (12) and the lower shell (112); And / or, the seismic data acquisition unit comprises a switch for turning on or off the power supply assembly (12).

4. The seismic data acquisition unit of claim 3, wherein, The lower shell (112) is an aluminum shell; And / or, the seismic data acquisition circuit board (13) and the plug-in port (1112) are conductively connected through a flexible wire circuit board (16); And / or, a foolproof structure is arranged between the dustproof cover assembly (18) and the plug-in port (1112); the dustproof cover assembly (18) comprises a cover body (181); the foolproof structure comprises a conductive sheet (183) arranged in the cover body (181) to short-circuit at least two lead pins (1113) on the plug-in port (1112) when the dustproof cover assembly (18) and the plug-in port (1112) are mounted in place; And / or, the seismic data acquisition unit comprises a detection circuit for detecting whether the dustproof cover assembly (18) is mounted in place with the plug-in port (1112) and a first prompting device connected with the detection circuit to send a prompt signal when the dustproof cover assembly (18) is not mounted in place. And / or, the seismic data acquisition unit comprises a leakage detection circuit for detecting whether the geophone is leaking and a second prompting device connected with the leakage detection circuit for sending a prompt signal when the geophone is leaking; And / or, the seismic data acquisition circuit board (13) is provided with a transmission unit for transmitting monitoring information of the seismic data acquisition station.

5. The seismic data acquisition unit of claim 4, wherein, The detection circuit comprises a detection chip and a switch, the detection chip comprises a detection input pin IN and a detection output pin OUT connected with at least two of the plurality of lead-out pin needles (1113), and the switch is arranged between the detection chip and the plurality of lead-out pin needles (1113) and is connected or disconnected with the at least two lead-out pin needles (1113) according to the control of the detection chip; When the dust cover assembly (18) is not installed in place, the detection chip detects that the signal of the detection input pin IN is high level; When the dust cover assembly (18) is installed in place, at least two of the lead-out pin needles (1113) are short-circuited, and the detection chip detects that the signal of the detection input pin IN is low level; The leakage detection circuit comprises a leakage detection chip, a data acquisition module connected with the leakage detection chip, a first connection lead wire connected with the data acquisition module and the geophone, a second connection lead wire connected with the data acquisition module and the geophone, a first switch and a second switch arranged side by side on the first connection lead wire, a third switch and a fourth switch arranged side by side on the second connection lead wire, a test line connected with the first connection lead wire and located between the first switch and the second switch, a resistor arranged on the test line, a fifth switch arranged on the test line and located between the resistor and the first switch, and a grounding wire connected with the fourth switch; When the geophone is not leaking, the resistance voltage drop is zero, and the voltage detected by the data acquisition module is equal to the test DC power supply voltage of the test line; When the geophone is leaking, the resistor generates a voltage drop, and the voltage detected by the data acquisition module is less than the test DC power supply voltage of the test line.

6. The seismic data acquisition unit of claim 4, wherein, The dust cover assembly (18) further comprises a detachable silica gel seat (182) extending into the cover body (181) and assembled with the cover body (181); The silica gel seat (182) is provided with a jack (1821) for corresponding insertion of the lead-out pin needle (1113) and preventing the cover body from rotating to drive the silica gel seat (182) to rotate; The plug-in port (1112) is provided with a peripheral anti-collision assembly (1114) surrounding at least part of the lead-out pin needle (1113); the anti-collision assembly (1114) comprises an anti-collision outer ring surrounding at least part of the lead-out pin needle (1113) periphery in a ring shape, and a plurality of anti-collision bones protrudingly arranged on the inner side wall of the anti-collision outer ring.

7. A device for connecting a seismic data acquisition unit to a geophone, characterized in that The cable body (21), a plug assembly (22) detachably arranged at one end of the cable body (21) and connected with the seismic data acquisition unit (10), a connector assembly (23) detachably arranged at the other end of the cable body (21) and detachably connected with an external geophone, and a protection assembly (24) sleeved on the cable body (21) to increase the bending radius of the cable body (21) and protect the cable body (21); The protection assembly (24) comprises a plurality of wire protection rings in the form of a ring and arranged equidistantly on the cable body (21); and the plug assembly (22) comprises a plug (221) and a first connecting piece (222).

8. The device for connecting a seismic data acquisition unit to a geophone according to claim 7, characterized in that, The protection assembly (24) comprises a plurality of wire protection rings in the form of a ring and arranged equidistantly on the cable body (21); and the wire protection ring is a rubber wire protection ring, a silica gel wire protection ring or a plastic wire protection ring. The plug assembly (22) comprises a plug (221) connected with a socket assembly (1111) of the seismic data acquisition unit (10). The connector assembly (23) comprises a connector (231) detachably connected with the geophone.

9. The device for connecting a seismic data acquisition unit to a geophone according to claim 8, characterized in that, The plug (221) comprises a mounting seat (2211) and a plug-in piece (2212) protruding from an end surface of one end of the mounting seat (2211) to be connected with the seismic data acquisition unit (10). The connector (231) is a threaded connector. The fastener (25) passes through the mounting seat (2211) and is fixedly connected with the socket assembly (1111) of the seismic data acquisition unit (10).

10. A seismic data acquisition station, characterized by, The seismic data acquisition unit (10) of any one of claims 1 to 6 and the connecting device (20) of the seismic data acquisition unit (10) and the geophone of any one of claims 7 to 9.

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