Ignition device for short-range data transmission

Abstract

This invention discloses an ignition device for short-range data transmission. The ignition device includes: an air gun ignition and data acquisition module, a preset capacitor, a detection circuit module, and a power supply module. The air gun ignition and data acquisition module controls air gun ignition and acquires coil data, near-field data, pressure data, and depth data. The preset capacitor controls ignition charging. The detection circuit module performs leakage current detection, identifies the connected air gun ignition and data acquisition module, and performs personnel fall-in-water detection. The power supply module converts the power supply voltage and provides power to the various modules in the ignition device. This solution achieves ignition control and data acquisition functions for underwater air guns, and also has leakage current detection and personnel fall-in-water detection functions. It provides greater flexibility in control and is of great significance for short-range data transmission in the field of marine seismic exploration.

Description

Technical Field

[0001] This invention relates to the field of marine oil seismic exploration, specifically to an ignition device for short-distance data transmission. Background Technology

[0002] Marine seismic exploration equipment mainly includes an airgun source system, a seismic data acquisition and recording system, a towed cable status control system, and an integrated navigation system. Among these, the airgun source system is an indispensable and crucial component. The most important aspect of using an airgun source to probe deep crustal structures is obtaining accurate airgun wavelets. A key component of the airgun source system is the airgun source control system, whose main function is to control the excitation of the airgun source, and to acquire real-time airgun synchronization signals, near-field wavelet signals, pressure and depth data, thereby monitoring the excitation quality of the airgun source.

[0003] As the primary excitation tool for marine seismic exploration, airgun seismic sources have garnered significant attention for many years. Their excitation methods have evolved from single-gun excitation to coherent gun excitation, and then to combined airgun array excitation. While each stage of excitation technology development or method change represents a continuous refinement and improvement of the excitation wave characteristics, the increasingly precise nature of seismic exploration targets has led to higher demands on the seismic waves generated by the source. Traditional synchronous excitation methods can no longer meet the needs of some new acquisition and construction methods. Therefore, airgun seismic source control systems require greater flexibility in control to adapt to the needs of high-precision 3D and 4D exploration. Summary of the Invention

[0004] In view of the above problems, the present invention is proposed to provide an ignition device for short-distance data transmission that overcomes or at least partially solves the above problems.

[0005] According to one aspect of the present invention, an ignition device for short-distance data transmission is provided. The ignition device includes: an air gun ignition and data acquisition module, a preset capacitor, a detection circuit module, and a power supply module.

[0006] The air gun ignition and data acquisition module is used to: control the air gun ignition, and acquire coil data, near-field data, pressure data, and depth data.

[0007] The preset capacitor is connected to the air gun ignition and data acquisition module to control ignition and charging;

[0008] The detection circuit module is connected to the air gun, multiple sensors, air gun ignition and data acquisition module, and is used for leakage detection, identification of the connected air gun ignition and data acquisition module, and detection of people falling into water.

[0009] The power module is used to convert the power supply voltage and use the converted power supply voltage to provide power to the various modules in the ignition device.

[0010] Furthermore, the air gun ignition and data acquisition module is configured using a combination of a field-programmable gate array (FPGA) and a microcontroller.

[0011] Furthermore, the air gun ignition and data acquisition module includes: a power supply circuit and an acquisition circuit;

[0012] The power supply circuit is used to convert the power voltage provided by the power module into various power voltages required by the air gun ignition and data acquisition modules for power supply.

[0013] The acquisition circuitry includes: a near-field signal acquisition circuit, an ignition signal acquisition circuit, an ignition voltage and current acquisition circuit, and pressure and depth signal acquisition circuits;

[0014] The near-field signal acquisition circuit is used to: process the signal from the near-field sensor through a filter circuit and an operational amplifier circuit, and then input it to the analog-to-digital converter chip for signal acquisition to obtain the near-field signal, and then send the near-field signal to the microcontroller through the first field-programmable gate array;

[0015] The ignition signal acquisition circuit is used to: convert the differential ignition input signal into a single-ended signal through a differential-to-single-ended circuit, process the single-ended signal through an anti-aliasing filter, and then input it to the analog-to-digital converter chip for signal acquisition to obtain the ignition signal. The ignition signal is then sent to the microcontroller through the first field-programmable gate array.

[0016] The ignition voltage and current acquisition circuit is used to: acquire the ignition voltage and ignition current at the moment of ignition;

[0017] The pressure and depth signal acquisition circuit is used to: convert the voltage of the pressure detection signal output by the pressure sensor into a signal that conforms to a first preset voltage range as a pressure signal through an operational amplifier circuit or a frequency conversion voltage circuit, and send the pressure signal to the microcontroller; and convert the voltage of the depth detection signal output by the depth sensor into a signal that conforms to a second preset voltage range as a depth signal through an operational amplifier circuit or a frequency conversion voltage circuit, and send the depth signal to the microcontroller.

[0018] Furthermore, there are multiple air gun ignition and data acquisition modules, which are connected to each other via a communication interface.

[0019] Furthermore, the detection circuit module includes: a leakage current detection unit, an air gun ignition and data acquisition module identification unit, and a personnel falling into water detection unit;

[0020] The leakage current detection unit is used to detect leakage current from the ignition wire and sensor signals to ground.

[0021] The air gun ignition and data acquisition module identification unit is used to: detect whether an air gun ignition and data acquisition module is connected at the current location, and provide a serial number for the connected air gun ignition and data acquisition module; wherein, the serial number is used to identify the air gun ignition and data acquisition module;

[0022] The personnel falling into water detection unit is used to: disconnect the relay upon receiving a personnel falling into water signal, thereby cutting off the power supply to the air gun ignition, data acquisition module, and digital package.

[0023] Furthermore, the detection circuit module also includes: a second field-programmable gate array;

[0024] The second field-programmable gate array is used to control the leakage current detection unit, the air gun ignition and data acquisition module identification unit, and the personnel falling into water detection unit.

[0025] Furthermore, the power module is further used to convert the power supply voltage from 220V to 48V.

[0026] Furthermore, the ignition device also includes: a control panel; the control panel is equipped with at least: a power switch for controlling the ignition device to turn on and off, a display module for displaying the operating voltage and operating current, an address selection module for selecting the address of the ignition device, a personnel drowning indicator light, and multiple communication interfaces.

[0027] Furthermore, multiple ignition devices establish communication by being cascaded through communication interfaces.

[0028] Furthermore, the ignition device is placed in the upper rack cabinet.

[0029] The technical solution provided by this invention can be applied to the air gun source control system. It can generate different high-voltage ignition signals according to the trigger signal to control the ignition of the underwater air gun, and collect data from multiple aspects such as coil, near field, pressure, and depth. It realizes the functions of ignition control and data acquisition for the underwater air gun, and also has functions such as leakage detection, identification of air gun ignition and data acquisition modules, and personnel falling into the water detection. It achieves more flexibility in control and can well adapt to the needs of high-precision 3D and 4D exploration. In the field of marine seismic exploration, it has achieved a breakthrough in short-distance data transmission, which is of great significance for short-distance data transmission and has important application prospects for short-distance cable data transmission and synchronous control of air gun ignition.

[0030] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and in order to make the above and other objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0031] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0032] Figure 1 A structural block diagram of an ignition device for short-distance data transmission according to an embodiment of the present invention is shown;

[0033] Figure 2 A schematic diagram of the ignition device 1 is shown;

[0034] Figure 3 A schematic diagram of the ignition device 2 is shown;

[0035] Figure 4 A schematic diagram of the near-field signal acquisition circuit is shown.

[0036] Figure 5 A schematic diagram of the ignition signal acquisition circuit is shown.

[0037] Figure 6 A schematic diagram of the ignition voltage and current acquisition circuit is shown.

[0038] Figure 7 A schematic diagram illustrating the principle of pressure signal acquisition in the pressure and depth signal acquisition circuit is shown.

[0039] Figure 8 A schematic diagram of the detection circuit module is shown.

[0040] Figure 9 A schematic diagram of the leakage current detection unit is shown;

[0041] Figure 10 A schematic diagram illustrating the principle of air gun ignition and data acquisition module identification is shown.

[0042] Figure 11 A schematic diagram of the principle of a personnel falling into water detection unit is shown;

[0043] Figure 12 A schematic diagram of the front panel is shown;

[0044] Figure 13 A schematic diagram of the rear panel is shown. Detailed Implementation

[0045] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0046] This invention provides an ignition device for short-distance data transmission, which can generate different high-voltage ignition signals according to the trigger signal to control the ignition of underwater air guns. It can realize the synchronous gun control of 256 air guns in 16 underwater arrays, and receive data from the 256 air guns through a 32-channel RS485 bus, including hardware serial number, ignition coil data, near-field detector data, pressure data, depth data, status data, etc. Figure 1 A structural block diagram of an ignition device for short-range data transmission according to an embodiment of the present invention is shown, such as... Figure 1 As shown, the ignition device includes an air gun ignition and data acquisition module 110, a preset capacitor 120, a detection circuit module 130, and a power supply module 140.

[0047] The air gun ignition and data acquisition module 110 is used to control air gun ignition and acquire coil data, near-field data, pressure data, and depth data. Multiple air gun ignition and data acquisition modules 110 can be used in a single ignition device, and they are connected via a communication interface. In this invention, the air gun ignition and data acquisition module 110 and the detection circuit module 130 can be designed using a Field Programmable Gate Array (FPGA). For ease of distinction, the FPGA in the air gun ignition and data acquisition module 110 is referred to as the first FPGA, and the FPGA in the detection circuit module 130 is referred to as the second FPGA. Specifically, the air gun ignition and data acquisition module 110 adopts an architecture combining the first FPGA and a microcontroller. The first FPGA implements near-field and coil data acquisition, while the microcontroller implements pressure, depth, voltage, and current detection functions.

[0048] The preset capacitor 120 is connected to the air gun ignition and data acquisition module 110 to control ignition and charging.

[0049] The detection circuit module 130 can perform functions including leakage current detection, air gun ignition and data acquisition module identification, and MOB (manoverboard, personnel falling into water) detection. Specifically, the detection circuit module 130 is connected to the air gun, multiple sensors, and the air gun ignition and data acquisition module 110, and is used for leakage current detection, identification of the connected air gun ignition and data acquisition module, and personnel falling into water detection.

[0050] The power module 140 is used to convert the power supply voltage and use the converted power supply voltage to provide power to the various modules in the ignition device. Specifically, the power module 140 converts the power supply voltage from 220V to 48V to power the air gun ignition and data acquisition module 110 and the detection circuit module 130.

[0051] The ignition device is housed in a 2U rack-mount chassis, meaning it can be installed in a standard 19-inch chassis with a height of 2U (88.9mm) and a depth of 456mm. It can be placed in a rack-mount cabinet. The ignition device can communicate with the control box via an RS485 bus and with the host computer via an RS232 bus.

[0052] With a single ignition device including four air gun ignition and data acquisition modules, eight channels of air gun ignition can be achieved. Taking the control of 16 air gun ignitions as an example, two ignition devices are required, which can be referred to as ignition device 1 and ignition device 2. The structural diagrams of ignition device 1 and ignition device 2 are shown below. Figure 2 and Figure 3 As shown, multiple ignition devices can establish communication through cascading communication interfaces, such as... Figure 2 and Figure 3 As shown, ignition device 2 can be connected to ignition device 1 via two 485 communication interfaces. In other words, multiple ignition devices can establish communication through 485 cascading.

[0053] like Figure 2 and Figure 3 As shown, ignition device 1 includes four air gun ignition and data acquisition modules 210, multiple preset capacitors 220, a detection circuit module 230, and a power supply module 240. Ignition device 2 includes four air gun ignition and data acquisition modules 310, multiple preset capacitors 320, a detection circuit module 330, and a power supply module 340. The air gun ignition and data acquisition modules 210 and 310 are connected via a 485 communication interface.

[0054] like Figure 2As shown, the 485 interface connected to the detection circuit module 230 enables the uploading of leakage current detection results and digital packet identification information from the ignition device 2 to the ignition device 1. The 485 interface connected to the digital packet enables the connection of the digital packet within the ignition device to the near-field 485 bus and the command 485 bus.

[0055] The air gun ignition and data acquisition module can perform functions including air gun ignition, coil acquisition, near-field acquisition, pressure acquisition, and depth acquisition. In this invention, the ignition device has two RS485 communication channels with the control box, using a 485 bus with a speed of 9600–1 Mbps; the RS485 interface uses a MAX3291 interface chip. One RS485 interface is connected to the FPGA, and the other RS485 bus is connected to the serial port of a microcontroller (e.g., STM32F373). The FPGA-controlled RS485 bus is mainly used for receiving various control commands and transmitting commands with high real-time requirements, while the RS485 connected to the microcontroller is used for ignition and near-field data transmission.

[0056] The air gun ignition and data acquisition module includes a power supply circuit and an acquisition circuit. The power supply circuit converts the power voltage provided by the power module into various power voltages required by the air gun ignition and data acquisition module for power supply. In this invention, the internal power supply of the ignition device is AC220V to 48V, with a supply current greater than 4A, which can directly power four air gun ignition and data acquisition modules after passing through a relay. The power supply circuit of the air gun ignition and data acquisition module converts the input DC48V voltage into various power supplies required by the air gun ignition and data acquisition module through a voltage conversion circuit. Specifically, the power supply circuit of the air gun ignition and data acquisition module uses DC48V input; for charging the ignition capacitor, a flashlight charging control chip can be used to control the charging; the DC48V is converted to DC24V output through an isolated power module; ±15V and +5V voltages are output through a 24V DC / DC converter, and then the +5V voltage is converted to 3.3V and 1.2V required by the microcontroller and FPGA.

[0057] The acquisition circuit may include: a near-field signal acquisition circuit, an ignition signal acquisition circuit, an ignition voltage and current acquisition circuit, and pressure and depth signal acquisition circuits. The near-field signal acquisition circuit is used to: process the signal from the near-field sensor through a filter circuit and an operational amplifier circuit, and then input it to an analog-to-digital converter chip for signal acquisition, obtaining the near-field signal. The near-field signal is then sent to the microcontroller via a first field-programmable gate array (FPGA). The near-field signal acquisition circuit controls a 24-bit analog-to-digital converter chip (such as the ADS1255) for signal acquisition via the first FPGA. Figure 4 A schematic diagram of the near-field signal acquisition circuit is shown, such as... Figure 4As shown, the signal from the near-field sensor is processed by the filter circuit 410 and the operational amplifier circuit 420 (product model can be PGA281, etc.) and then input to the input terminal of the analog-to-digital converter chip 430 for signal acquisition. The acquired near-field signal can be temporarily stored in the random access memory (RAM) of the first field-programmable gate array 440. After the acquisition is completed, the first field-programmable gate array 440 sends the acquired near-field signal to the microcontroller via SPI, and then the microcontroller transmits it to the target location via the RS485 data bus. The acquisition of the near-field sensor signal has a maximum sampling rate of 0.5ms (2k), 24 bits, and an acquisition time of 0-10s. Synchronization control and digital filtering are required; each digital packet requires the acquisition of signals from two near-field sensors.

[0058] The ignition signal acquisition circuit is used to: convert the differential ignition input signal into a single-ended signal through a differential-to-single-ended circuit, process the single-ended signal through an anti-aliasing filter, and then input it to the analog-to-digital converter chip for signal acquisition to obtain the ignition signal. Finally, the ignition signal is sent to the microcontroller through the first field-programmable gate array. Figure 5 A schematic diagram of the ignition signal acquisition circuit is shown, such as... Figure 5 As shown, the ignition differential input signal is input to the differential-to-single-ended circuit 510, which converts it into a single-ended signal. Then, the single-ended signal is processed by the anti-aliasing filter 520, which attenuates high frequencies that cause aliasing. The signal output from the anti-aliasing filter 520 is then input to the analog-to-digital converter chip 530 (such as ADS1255) for signal acquisition to obtain the ignition signal. Finally, the ignition signal is sent to the microcontroller through the first field-programmable gate array 540.

[0059] The ignition voltage and current acquisition circuit is used to acquire the ignition voltage and ignition current at the moment of ignition in order to determine any abnormalities in the digital package ignition circuit. Figure 6 A schematic diagram of the ignition voltage and current acquisition circuit is shown, as follows: Figure 6 As shown, the ignition voltage is acquired through a resistor divider, and the ignition current is acquired by connecting a current sampling resistor in series in the circuit. The microcontroller used is the STM32F373, a microcontroller with an internal 16-bit ADC and two DACs, suitable for signal measurement and other applications.

[0060] The pressure and depth signal acquisition circuit is used to: convert the voltage of the pressure detection signal output by the pressure sensor into a signal conforming to a first preset voltage range as the pressure signal through an operational amplifier circuit or a frequency-to-voltage conversion circuit, and send the pressure signal to the microcontroller; and convert the voltage of the depth detection signal output by the depth sensor into a signal conforming to a second preset voltage range as the depth signal through an operational amplifier circuit or a frequency-to-voltage conversion circuit, and send the depth signal to the microcontroller. Specifically, the pressure and depth signal acquisition circuit mainly realizes the acquisition of pressure and depth signals, acquiring signals from built-in or external sensors with each shot. The built-in sensor is a voltage output type sensor, powered by 3-5V, with an output range of 0.25-2.25V; the external sensor is a frequency output type sensor, powered by 24VDC, outputting a square wave with a peak value of approximately 20V. Different square wave frequencies represent different pressures and depths. When built-in, each digital package can be configured with one pressure sensor and one depth sensor; when external, each digital package can only be configured with one pressure sensor or one depth sensor, not both simultaneously. Figure 7 The diagram illustrates the principle of pressure signal acquisition in the pressure and depth signal acquisition circuit, as shown below. Figure 7 As shown, the pressure and depth signal acquisition circuit receives signals from a pressure sensor (with a switching voltage of 2kHz to 5kHz). For the built-in pressure sensor 710, the operational amplifier circuit 720 converts it into a signal conforming to a first preset voltage range (e.g., 0 to 5V) to obtain a pressure signal; for the external pressure sensor 730, the frequency conversion voltage circuit 740 converts it into a signal conforming to the first preset voltage range (e.g., 0 to 5V) to obtain a pressure signal. The pressure signal is then sent to a microcontroller (product model STM32F373) to achieve A / D data acquisition. Figure 7 The current control shown is used to power the pressure sensor. The schematic diagram for depth signal acquisition is similar to that for pressure signal acquisition, and will not be repeated here.

[0061] The detection circuit module receives instructions from the host computer via RS-232 communication and uploads relevant detection information, providing serial numbers and other information for the air gun ignition and data acquisition module. Specifically, the detection circuit module includes: a leakage current detection unit, an air gun ignition and data acquisition module identification unit, and a personnel falling into water detection unit; the detection circuit module may also include: a second field-programmable gate array, a communication unit, etc.

[0062] Figure 8 A schematic diagram of the detection circuit module is shown, as follows: Figure 8As shown, the detection circuit module includes: a leakage current detection unit 810, an air gun ignition and data acquisition module identification unit 820, a personnel falling into water detection unit 830, a second field programmable gate array 840, a communication unit 850, and multiple interfaces. The leakage current detection unit 810, the air gun ignition and data acquisition module identification unit 820, and the personnel falling into water detection unit 830 in the detection circuit module are connected to the air gun ignition and data acquisition module through corresponding interfaces; the leakage current detection unit 810 is connected to the air gun and multiple sensors through an interface; the communication unit 850 is connected to the control panel of the ignition device through a 485 interface and a 232 interface; the second field-programmable gate array 840 is connected to the leakage current detection unit 810, the air gun ignition and data acquisition module identification unit 820, and the personnel falling into water detection unit 830, and the second field-programmable gate array 840 is also connected to the control panel of the ignition device through a MOB interface. The second field-programmable gate array 840 is used to control the leakage current detection unit 810, the air gun ignition and data acquisition module identification unit 820, and the personnel falling into water detection unit 830.

[0063] The leakage current detection unit 810 is used to detect leakage current to ground in the ignition wire and sensor signals. Upon receiving a leakage current detection command from the host computer software via RS-232, leakage current detection begins. After detection, the results are uploaded to the host computer via the second field-programmable gate array 840 and the communication unit 850. When performing leakage current detection on the gun cable, the connection between the ignition device and the gun cable is cut off using a relay control. Under normal circumstances, the ignition signal line and other sensor signal lines are open-circuited to ground. During leakage current detection, if current is collected by the current acquisition module (such as an ammeter), it indicates a leakage problem in the gun cable. The degree of leakage can be determined based on the current value. When the current value reaches approximately 0.5A, it proves that the ignition wire and other sensor signal lines are completely short-circuited to ground, requiring immediate investigation of the gun cable. The current acquisition module used in the leakage current detection unit 810 has an acquisition accuracy of up to the μA level, which can well meet the detection requirements. A schematic diagram of the leakage current detection unit 810 is shown below. Figure 9 As shown.

[0064] The air gun ignition and data acquisition module identification unit 820 is used to: detect whether an air gun ignition and data acquisition module is connected at the current location, and provide a serial number for the connected air gun ignition and data acquisition module; wherein, the serial number is used to identify the air gun ignition and data acquisition module. The air gun ignition and data acquisition module identification unit 820 mainly performs two functions. One function is to detect whether an air gun ignition and data acquisition module is connected at the current location, which is achieved by each air gun ignition and data acquisition module sending an electrical signal to the air gun ignition and data acquisition module identification unit 820; the other function is to input the serial number for the connected air gun ignition and data acquisition module.

[0065] Figure 10 A schematic diagram illustrating the principle of air gun ignition and data acquisition module identification is shown, such as... Figure 10 As shown, the air gun ignition and data acquisition module receives two independent level signals from the air gun ignition and data acquisition module identification unit in the detection circuit module, while the four air gun ignition and data acquisition modules share these two level signals. The serial number has four digits, used to distinguish the 16 air gun ignition and data acquisition modules within the four ignition devices. The two highest digits of the serial number distinguish different ignition devices, while the two lowest digits distinguish the four air gun ignition and data acquisition modules within the same ignition device. The ignition device determines the output address signal value based on the address selection module (such as an address selection knob) on its control panel. For example, the address selection module has four values, 1 to 4. When the address selection module is set to 1, the address signal value of the ignition device is 01. The determination of the address signal values ​​for other ignition devices is similar and will not be elaborated here.

[0066] The personnel falling into water detection unit 830 is used to: disconnect the relay upon receiving a personnel falling into water signal, thereby cutting off the power supply to the air gun ignition and data acquisition module and the digital package. When a person falls into the water, pressing the MOB button will cause the ignition device to receive the personnel falling into water signal (i.e., the MOB signal). Based on the personnel falling into the water signal, the device will send a disconnect command to the relay, thereby disconnecting the relay and cutting off the power to the air gun ignition and data acquisition module and the digital package.

[0067] Figure 11 A schematic diagram of the principle of a personnel falling into water detection unit is shown, such as... Figure 11 As shown, when the MOB is not triggered and both ends are conducting, the relays are in the energized state, relays 3 and 4 are conducting, the solid-state relay is conducting, and the digital packet is powered normally. When the MOB is triggered, both ends are disconnected, causing relays 3 and 4 to disconnect, the solid-state relay to disconnect, and the power supply to the digital packet is cut off.

[0068] Alternatively, the modules in the ignition device may be designed to be pluggable.

[0069] In this invention, the ignition device further includes a control panel. The control panel includes at least: a power switch for controlling the ignition device to turn on and off, a display module for displaying the operating voltage and current, an address selection module for selecting the ignition device address, a personnel drowning indicator light, and multiple communication interfaces. Specifically, the control panel can be divided into a front panel and a rear panel. Figure 12 A schematic diagram of the front panel is shown, such as Figure 12 As shown, the front panel includes a power switch, a display module for displaying the operating voltage and current, an address selection module (specifically, an address selection knob), and a MOB indicator. Figure 13 A schematic diagram of the rear panel is shown, as follows: Figure 13 As shown, the rear panel includes an AC220V power input interface and various cable interfaces, including a near-field interface, a coil interface, a pressure depth interface, an ignition interface, and 485 communication cascade input / output, 485 detection cascade input / output, and 232 detection upload, etc.

[0070] The short-range data transmission ignition device provided in this embodiment can be applied to the air gun source control system. It can generate different high-voltage ignition signals according to the trigger signal to control the ignition of the underwater air gun, and collect data from multiple aspects such as coil, near field, pressure, and depth. It realizes the functions of ignition control and data acquisition for the underwater air gun, and also has functions such as leakage detection, identification of air gun ignition and data acquisition modules, and personnel falling into the water detection. It achieves more flexibility in control and can well adapt to the needs of high-precision 3D and 4D exploration. In the field of marine seismic exploration, it has achieved a breakthrough in short-range data transmission, which is of great significance for short-range data transmission and has important application prospects for short-range cable data transmission and synchronous control of air gun ignition.

[0071] The algorithms and displays provided herein are not inherently related to any particular computer, virtual system, or other device. Various general-purpose systems can also be used in conjunction with the teachings herein. The required structure for constructing such systems is apparent from the above description. Furthermore, this invention is not directed to any particular programming language. It should be understood that the contents of the invention described herein can be implemented using various programming languages, and the above description of specific languages ​​is for the purpose of disclosing the best mode of implementation of the invention.

[0072] Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0073] Similarly, it should be understood that, in order to streamline this disclosure and aid in understanding one or more of the various inventive aspects, in the above description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof. However, this method of disclosure should not be interpreted as reflecting an intention that the claimed invention requires more features than are expressly recited in each claim. Rather, as reflected in the claims, inventive aspects lie in fewer than all features of a single foregoing disclosed embodiment. Therefore, the claims following the detailed description are hereby expressly incorporated into that detailed description, wherein each claim itself is a separate embodiment of the invention.

[0074] Those skilled in the art will understand that modules in the device of the embodiments can be adaptively changed and placed in one or more devices different from that embodiment. Modules, units, or components in the embodiments can be combined into a single module, unit, or component, and further, they can be divided into multiple sub-modules, sub-units, or sub-components. Except where at least some of such features and / or processes or units are mutually exclusive, any combination can be used to combine all features disclosed in this specification (including the accompanying claims, abstract, and drawings) and all processes or units of any method or device so disclosed. Unless expressly stated otherwise, each feature disclosed in this specification (including the accompanying claims, abstract, and drawings) may be replaced by an alternative feature that serves the same, equivalent, or similar purpose.

[0075] Furthermore, those skilled in the art will understand that although some embodiments described herein include certain features but not others included in other embodiments, combinations of features from different embodiments are intended to be within the scope of the invention and form different embodiments. For example, in the claims, any of the claimed embodiments can be used in any combination.

[0076] The various component embodiments of the present invention can be implemented in hardware, or as software modules running on one or more processors, or a combination thereof. Those skilled in the art will understand that microprocessors or digital signal processors (DSPs) can be used in practice to implement some or all of the functions of some or all of the components according to the embodiments of the present invention. The present invention can also be implemented as a device or apparatus program (e.g., a computer program and computer program product) for performing part or all of the methods described herein. Such programs implementing the present invention can be stored on a computer-readable medium, or can be in the form of one or more signals. Such signals can be downloaded from an Internet website, provided on a carrier signal, or provided in any other form.

[0077] It should be noted that the above embodiments are illustrative of the invention and not restrictive, and that those skilled in the art can devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses should not be construed as limiting the claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention can be implemented by means of hardware comprising several different elements and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, and third, etc., does not indicate any order. These words can be interpreted as names.

Claims

1. An ignition device for short-distance data transmission, characterized in that, The ignition device includes: an air gun ignition and data acquisition module, a preset capacitor, a detection circuit module, and a power supply module. The air gun ignition and data acquisition module is used to: control the air gun ignition, and acquire coil data, near-field data, pressure data, and depth data. The preset capacitor is connected to the air gun ignition and data acquisition module and is used to control ignition and charging. The detection circuit module is connected to the air gun, multiple sensors, and the air gun ignition and data acquisition module, and is used to perform leakage current detection, identify the connected air gun ignition and data acquisition module, and perform personnel falling into water detection. The power module is used to: convert the power supply voltage and use the converted power supply voltage to provide power to each module in the ignition device; The air gun ignition and data acquisition module is configured using an architecture combining a first field-programmable gate array and a microcontroller. The air gun ignition and data acquisition module includes: a power supply circuit and an acquisition circuit; The power circuit is used to convert the power voltage provided by the power module into various power voltages required by the air gun ignition and data acquisition module for power supply. The acquisition circuit includes: a near-field signal acquisition circuit, an ignition signal acquisition circuit, an ignition voltage and current acquisition circuit, and a pressure and depth signal acquisition circuit. The near-field signal acquisition circuit is used to: process the signal from the near-field sensor through a filter circuit and an operational amplifier circuit, and then input it to the analog-to-digital converter chip for signal acquisition to obtain a near-field signal, and send the near-field signal to the microcontroller through the first field-programmable gate array; The ignition signal acquisition circuit is used to: convert the differential ignition input signal into a single-ended signal through a differential-to-single-ended circuit, process the single-ended signal through an anti-aliasing filter, and then input it into an analog-to-digital converter chip for signal acquisition to obtain the ignition signal, and send the ignition signal to the microcontroller through the first field-programmable gate array. The ignition voltage and current acquisition circuit is used to: acquire the ignition voltage and ignition current at the moment of ignition; The pressure and depth signal acquisition circuit is used to: convert the voltage of the pressure detection signal output by the pressure sensor into a signal that conforms to a first preset voltage range as a pressure signal through an operational amplifier circuit or a frequency conversion voltage circuit, and send the pressure signal to the microcontroller; and convert the voltage of the depth detection signal output by the depth sensor into a signal that conforms to a second preset voltage range as a depth signal through an operational amplifier circuit or a frequency conversion voltage circuit, and send the depth signal to the microcontroller.

2. The ignition device according to claim 1, characterized in that, There are multiple air gun ignition and data acquisition modules, which are connected to each other through a communication interface.

3. The ignition device according to claim 1, characterized in that, The detection circuit module includes: a leakage current detection unit, an air gun ignition and data acquisition module identification unit, and a personnel falling into water detection unit. The leakage detection unit is used to detect leakage current from the ignition wire and sensor signal to ground. The air gun ignition and data acquisition module identification unit is used to: detect whether the air gun ignition and data acquisition module is connected at the current location, and provide a serial number for the connected air gun ignition and data acquisition module; wherein, the serial number is used to identify the air gun ignition and data acquisition module; The personnel falling into water detection unit is used to: disconnect the relay based on the received personnel falling into water signal, so as to cut off the power supply to the air gun ignition and data acquisition module and the digital package.

4. The ignition device according to claim 3, characterized in that, The detection circuit module further includes: a second field-programmable gate array; The second field-programmable gate array is used to control the leakage current detection unit, the air gun ignition and data acquisition module identification unit, and the personnel falling into water detection unit.

5. The ignition device according to claim 1, characterized in that, The power module is further used to convert the power supply voltage from 220V to 48V.

6. The ignition device according to any one of claims 1-5, characterized in that, The ignition device further includes a control panel; the control panel is equipped with at least: a power switch for controlling the ignition device to turn on and off, a display module for displaying the operating voltage and operating current, an address selection module for selecting the address of the ignition device, a personnel drowning indicator light, and multiple communication interfaces.

7. The ignition device according to any one of claims 1-5, characterized in that, Multiple ignition devices establish communication by being cascaded through a communication interface.

8. The ignition device according to any one of claims 1-5, characterized in that, The ignition device is placed in the upper rack cabinet.

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