Seismic source fired time break signal pickup recording apparatus and method

Abstract

This invention discloses a device and method for acquiring and recording intermittent signals during seismic source excitation. The device includes: a processing terminal, a central control module (MCU), and a GPS module, a Bluetooth module, and a power supply for each module, all connected to the MCU. The GPS module acquires the current seismic source location and time information. The MCU receives the intermittent pulse signals from the current seismic source electronic control system, timestamps them, and sends the timestamp information and the current seismic source location information located by GPS to the processing terminal via the Bluetooth module. The processing terminal matches the current seismic source location information located by GPS with the ground station design location and records the timestamp and location information. This invention can realize functions such as blast point location navigation, automatic ground station matching, recording the TB time from the seismic source control system, controlling seismic source excitation, and managing seismic source production tasks.

Description

Technical Field

[0001] This invention relates to the field of equipment technology for mineral exploration and engineering exploration, such as oil / coal fields, and specifically to a device and method for picking up and recording time-interrupted signals from seismic sources. Background Technology

[0002] The theoretical basis of seismic exploration is to obtain accurate travel times of reflected waves by recording the propagation time of seismic waves in the strata. This requires ensuring that the source excitation and data acquisition are started synchronously. When acquiring data using traditional wired seismic instruments, the encoder installed on the instrument vehicle can set and load the control parameters and commands of the source via radio, controlling the synchronous start of each seismic source involved in the operation and synchronizing with the instrument acquisition. It also receives quality control data of the source during the vibration process returned by the electronic control system.

[0003] When using wireless node seismic data acquisition instruments, the nodes are deployed in the field and activated to continuously record vibration signals and GPS time. After the nodes are retrieved, the downloaded seismic data is segmented based on the source excitation time (TB time), thus obtaining an acquisition signal synchronized with the source excitation. In this way, the seismic source can initiate vibration scanning directly according to the construction design without waiting for instructions from the seismic acquisition instrument, completing the operation independently. Indoors, the seismic data acquired by the nodes is segmented based on the TB time, achieving synchronization between seismic signal excitation and acquisition. Therefore, how to assign production tasks to the seismic source, control source excitation, and obtain high-precision TB time information and source quality control information is a problem that needs to be solved. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, the present invention provides a device and method for picking up and recording seismic source excitation time-interruption signals, realizing shot point location navigation, automatic ground station matching, and recording of seismic source TB time, etc.

[0005] To solve the above problems, the technical solution adopted by the present invention is as follows:

[0006] A device for picking up and recording intermittent signals excited by a seismic source, characterized in that the device comprises: a processing terminal, a central control module (MCU), a GPS module, a Bluetooth module, and a power supply for each module, all connected to the central control module (MCU).

[0007] The GPS module is used to obtain the current earthquake source location and time information;

[0008] The central control module MCU is also connected to the current seismic source electronic control system to receive 1PPS time pulses from GPS to precisely calibrate the local clock, and to receive the time-interrupted pulse signals from the current seismic source electronic control system and timestamp them. The timestamp information and the current seismic source location information located by GPS are then sent to the processing terminal via Bluetooth module.

[0009] The processing terminal is configured with a shot point coordinate file. When it receives the timestamp information of the time-interrupted pulse signal, it matches the current source location information located by GPS with the ground station number of the shot point design location and records the timestamp information and location information.

[0010] Furthermore, the recorded information includes the current location determined by GPS positioning and the timestamp information of the intermittent pulse signal.

[0011] Furthermore, when matching the current GPS-positioned seismic source location information with the shot point coordinate file for ground stationing, it is necessary to obtain the relative distance and orientation between the current location and the designed seismic source excitation point.

[0012] Furthermore, it also includes an intermediate processing module connected to the central control module MCU. The intermediate processing module is also communicatively connected to the seismic source electronic control system. The intermediate processing module is used to receive the QC file from the seismic source electronic control system and transmit the QC file to the central control module MCU. The central control module MCU transmits the file to the processing terminal via Bluetooth module for the processing terminal to view.

[0013] Furthermore, the intermediate processing module is also used to transmit the configuration and instructions of the processing terminal or central control module MCU to the vibration source electronic control system.

[0014] Furthermore, the intermediate processing module adopts the NanoPi NEO minimum system.

[0015] Furthermore, the processing terminal is a tablet computer.

[0016] Furthermore, the central control module MCU is also connected to the source power control module, which is also connected to the source electrical control system. Under the control of the central control module MCU, the source power control module generates an amplified short-circuit signal and sends it to the source electrical control system as a start command for the source electrical control system, thereby controlling the source vibration and managing the source production tasks.

[0017] Furthermore, the central control module MCU also communicates with the radio. The central control module MCU also forwards the production status and QC information data of the tablet computer to the outside world through the radio. The central control module MCU can also receive radio information and transmit the radio information to the processing terminal.

[0018] A method for acquiring and recording seismic source excitation interruption signals using a seismic source excitation interruption signal acquisition and recording device, characterized in that the method includes:

[0019] Obtain the current location and time information of the earthquake source;

[0020] The local clock is precisely calibrated by receiving 1PPS time pulses from GPS, the time-discontinuing pulse signals from the current seismic source control system are received and timestamped, and the timestamp information and the current seismic source location information from GPS are sent to the processing terminal via Bluetooth module.

[0021] When the processing terminal receives the timestamp information of the intermittent pulse signal, it matches the current source location information located by GPS with the ground station number of the shot point design location and records the timestamp information and location information.

[0022] The beneficial effects of the above technical solution include at least the following: by setting up a source excitation time interruption signal pickup and recording device, the device includes a processing terminal, a central control module MCU and a GPS module, a Bluetooth module and a power supply connected to the central control module MCU respectively, which can realize the functions of shot point location navigation, automatic ground station matching, recording the TB time from the source control system, controlling source excitation and thus managing source production tasks.

[0023] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0024] Figure 1 This is a circuit module block diagram of an embodiment of the present invention;

[0025] Figure 2 This is a circuit diagram of the source output control module according to an embodiment of the present invention;

[0026] Figure 3 This is a flowchart of a method according to an embodiment of the present invention. Detailed Implementation

[0027] In practical implementation, the device of this embodiment can be installed on a seismic source vehicle and connected to the seismic source electronic control system. A detailed example is provided below.

[0028] like Figure 1As shown, a device for acquiring and recording intermittent signals from a seismic source excitation is disclosed. The device includes a central control module (MCU), a GPS module, a Bluetooth module, a minimum system, a seismic source output control module, a processing terminal, and a power supply for each module. The connection relationships are shown in the figure. In this embodiment, the GPS module can be installed on the seismic source vehicle for locating the seismic source. The central control module (MCU) is the core of this device and can communicate with the seismic source electronic control system through the minimum system. The processing terminal in this embodiment can be a tablet computer.

[0029] The main working principle of this embodiment can be summarized as follows: the central control module (MCU) forwards the received GPS location information to the tablet computer via Bluetooth for navigation; the 1PPS time pulse received from the GPS is used for precise clock calibration. Upon receiving the time break (TB) pulse signal from the seismic source electronic control system, the central control module (MCU) timestamps it (accurate to microseconds) and then forwards it to the tablet computer via Bluetooth. The tablet computer displays the current location forwarded by the central control module (MCU), with the excitation point (shot point) of the SPS file as the background. When the tablet computer receives the TB timestamp information forwarded by the MCU, it immediately matches the current coordinates with the ground station of the excitation point and records it. This allows for the segmentation of the seismic data acquired by the nodes based on the TB, thus achieving synchronization between seismic signal excitation and acquisition.

[0030] The tablet displays the GPS location coordinates forwarded by the MCU. Since the tablet imports a pre-designed shot point coordinate file, it uses this pre-designed shot point coordinate as the background map and the GPS location coordinate as the current location coordinate. When it receives the TB timestamp information forwarded by the MCU, it matches the current location coordinate with the designed shot point coordinate and calculates the distance and azimuth between the current location and the designed point. When the current location coordinate matches the designed shot point coordinate, the location and time are recorded. When the raw seismic data collected by the nodes is segmented, the TB time is taken as zero, that is, the seismic source excites seismic waves at this moment, and each node starts receiving seismic waves at this moment, thus achieving synchronization between the excitation time of the seismic waves and the start time of data acquisition by the nodes.

[0031] In specific implementation, the minimum system in this embodiment specifically refers to the intermediate-level processing module, which is mainly used to receive the QC file from the seismic source electronic control system and transmit the QC file to the central control module MCU. The central control module MCU then transmits the QC file to the processing terminal via Bluetooth for viewing. The intermediate-level processing module is also used to transmit the configuration and instructions of the processing terminal or the central control module MCU to the seismic source electronic control system. In this embodiment, the minimum system can be a NanoPi NEO minimum computing system or a microcontroller or other processing system.

[0032] In this embodiment, the central control module can use an STM32L471VET6 processing chip and its necessary peripheral circuits; the Bluetooth module can use an E72-2G4M02S2B; the minimum system can use a NanoPi NEO; and the seismic source output control module can be driven by an HCPL-M456 optocoupler. Figure 2 The diagram shows the circuit schematic of a seismic source output control module. The central control module (MCU) is connected to the input terminal of the seismic source output control module via the PD14 terminal. The output terminal (FO) of the seismic source output control module is connected to the main control of the seismic source electronic control system. Under the control of the central control module (MCU), a short-circuit signal is generated and sent to the seismic source electronic control system as the start command of the seismic source electronic control system, thereby controlling the vibration of the seismic source and managing the production tasks of the seismic source.

[0033] The power control module provides appropriate voltage power to each functional module.

[0034] In this embodiment, the central control module (MCU) communicates with the radio via UART4 serial ports (PA0, PA1) to receive radio information and can also forward the excitation production status and QC information data from the tablet computer via the radio. The central control module (MCU) communicates with the GPS via USART2 serial ports (PA2, PA3) to receive GPS location information and forwards the received GPS location information to the tablet computer via Bluetooth. It receives 1PPS time pulses from the GPS via PB2 for precise clock calibration. It receives time break (TB) pulse signals from the seismic source electronic control system via PD13, and immediately timestamps (accurate to microseconds) upon receiving a time break (TB) pulse signal from the electronic control system and forwards it to the tablet computer via the Bluetooth module for recording. It communicates with the Bluetooth module via USART3 serial ports (PD8, PD9) to forward the GPS location information and TB timestamp information from the seismic source electronic control system received by the central control module (MCU) to the tablet computer via Bluetooth. It can also transmit the excitation production status and QC information data from the tablet computer to the MCU via Bluetooth and then forward it via the radio. The Bluetooth module acts as a bridge for data interaction between the tablet computer and the MCU.

[0035] The NanoPi NEO communicates with the seismic source control system via a network and with the central control module MCU via UART5 serial ports (PC12, PD2). The NanoPi receives and parses QC files transmitted by the seismic source control system via FTP, sending them to a tablet computer for user viewing. It can also forward configuration and instructions from the tablet computer / central control module MCU to the seismic source control system.

[0036] This device enables functions such as blast point location navigation, automatic ground station matching, recording of seismic source TB time, control of seismic source excitation, and management of seismic source production tasks.

[0037] This embodiment also provides a method for picking up and recording the discontinuity signal during seismic source excitation using a seismic source excitation time-discontinuity signal picking and recording device, such as... Figure 3 As shown, the method includes:

[0038] Obtain the current location and time information of the epicenter using GPS;

[0039] It receives the time-discontinuity pulse signal from the current seismic source control system, and sends the timestamp information when the time-discontinuity pulse signal from the seismic source control system is received, along with the current seismic source location information from GPS positioning, to the processing terminal via Bluetooth module;

[0040] When the processing terminal receives the timestamp information forwarded by the Bluetooth module, it matches the current GPS-positioned seismic source location information with the ground station coordinate file and records it.

[0041] The hardware implementation and principle of this method are described in the device of this embodiment, and will not be repeated here.

[0042] The above embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A device for picking up and recording intermittent signals from seismic source excitation, characterized in that, The device includes: a processing terminal, a central control module (MCU), a GPS module, a Bluetooth module, and a power supply for each module, all connected to the central control module (MCU). The GPS module is used to obtain the current earthquake source location and time information; The central control module MCU is also connected to the current seismic source electronic control system to receive 1PPS time pulses from GPS to precisely calibrate the local clock, and to receive the time-interrupted pulse signals from the current seismic source electronic control system and timestamp them. The timestamp information and the current seismic source location information located by GPS are then sent to the processing terminal via Bluetooth module. The processing terminal is configured with a shot point coordinate file. When it receives the timestamp information of the time-interrupted pulse signal, it matches the current source location information located by GPS with the ground station number of the shot point design location and records the timestamp information and location information. The recorded information includes the current location located by GPS and the timestamp information of the time-interrupted pulse signal. When matching the current GPS-positioned seismic source location information with the shot point coordinate file for ground stationing, it is necessary to obtain the relative distance and orientation between the current location and the designed seismic source excitation point. It also includes an intermediate processing module connected to the central control module MCU. The intermediate processing module is also connected to the seismic source electronic control system. The intermediate processing module is used to receive the QC file from the seismic source electronic control system and transmit the QC file to the central control module MCU. The central control module MCU transmits the file to the processing terminal via Bluetooth module for the processing terminal to view. The central control module (MCU) also communicates with the radio. The MCU also forwards the production status and QC information data of the tablet computer to the outside world through the radio. The MCU can also receive radio information and transmit the radio information to the processing terminal.

2. The seismic source excitation time-interruption signal acquisition and recording device as described in claim 1, characterized in that: The intermediate processing module is also used to transmit the configuration and instructions of the processing terminal or central control module MCU to the seismic source electronic control system.

3. The seismic source excitation time-interruption signal pickup and recording device as described in claim 1 or 2, characterized in that: The intermediate processing module uses the NanoPi NEO minimum system.

4. The seismic source excitation time-interruption signal acquisition and recording device as described in claim 1, characterized in that: The processing terminal is a tablet computer.

5. The seismic source excitation time-interruption signal acquisition and recording device as described in claim 1, characterized in that: The central control module (MCU) is also connected to the source power control module, which is also connected to the source electrical control system. Under the control of the central control module (MCU), the source power control module generates an amplified short-circuit signal and sends it to the source electrical control system as a start command for the source electrical control system, thereby controlling the source vibration and managing the source production tasks.

6. A method for recording a seismic source excitation interruption signal using a seismic source excitation interruption signal acquisition and recording device according to any one of claims 1-5, characterized in that, The method includes: Obtain the current location and time information of the earthquake source; The local clock is precisely calibrated by receiving 1PPS time pulses from GPS, the time-discontinuing pulse signals from the current seismic source control system are received and timestamped, and the timestamp information and the current seismic source location information from GPS are sent to the processing terminal via Bluetooth module. When the processing terminal receives the timestamp information of the intermittent pulse signal, it matches the current source location information located by GPS with the ground station number of the shot point design location and records the timestamp information and location information.

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