Initiation timing monitoring device and initiation system
By using satellite time synchronization and high-speed A/D converter to monitor detonator voltage and current, the problem of low time accuracy in existing technologies has been solved, enabling precise monitoring of detonator detonation time and improving the accuracy and efficiency of the detonation system.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CHINA PETROCHEMICAL CORP
- Filing Date
- 2024-12-09
- Publication Date
- 2026-06-09
AI Technical Summary
Existing detonation methods are affected by radio delay time, terrain, and weather, resulting in low time accuracy and failing to meet the accuracy requirements of high-density 3D seismic exploration.
The clock of the satellite timing signal synchronization command module and the voltage and current acquisition module is combined with a high-speed A/D converter to monitor the voltage and current values of the detonator in real time. The detonation time of the detonator can be accurately monitored through the Beidou or GPS timing system.
It achieves high-precision monitoring of detonator detonation time, avoids radio delay and environmental influence, improves the accuracy of detonation and work efficiency, and achieves a timing accuracy of 100µs.
Smart Images
Figure CN122172267A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of geophysical exploration well technology, and in particular to a detonation timing monitoring device and detonation system. Background Technology
[0002] As exploration and development in old oilfields deepens, the accuracy of existing two-dimensional seismic data can no longer meet the needs of exploration and development in old oilfields. High-density three-dimensional seismic technology can significantly improve the quality of seismic data and is a key technology for secondary exploration in old oilfields. However, due to environmental limitations, surface blasting cannot be carried out in urban oilfields, making it difficult to conduct three-dimensional seismic surveys.
[0003] Conventional seismic exploration widely employs a surface-excitation and surface-reception method. Multiple seismic charge charges are placed in shallow wells on the surface, and multiple geophones are installed. After the seismic source is excited, the geophones receive the seismic wave signals and transmit them to surface instruments for recording, so that the data can be processed and compiled into results later in the laboratory. During signal acquisition, timing accuracy is a key factor affecting the quality of acquisition.
[0004] The commonly used detonation method is the synchronous detonation control method. This method consists of a main control unit (main unit) comprised of a receiving and recording system, and a controlled unit comprised of the receiving and recording system and the detonating system of the detonator. The controlled unit receives and records the information and generates a synchronous detonation control signal. One signal activates the recording system, putting it into recording mode, while the other signal is modulated and transmitted via a general-purpose radio. Upon receiving the synchronous detonation control signal, the detonation system decodes it and activates the detonation system to energize the electric detonator and detonate the explosive. After the explosion, the controlled unit transmits relevant information about the explosion point back to the control unit, which records this information. This detonation method ensures that the detonation and recording occur within the same timeframe, allowing for the calculation of the relative time difference of seismic wave propagation. However, this method is affected by radio delay, terrain, and weather conditions, resulting in low time accuracy. Summary of the Invention
[0005] To address the problems in the prior art, the present invention provides a detonation timing monitoring device and a detonation system.
[0006] This invention provides a detonation timing monitoring device, comprising:
[0007] The instruction module is used to send voltage and current adjustment commands to the power supply circuit to detonate the detonator;
[0008] A voltage and current acquisition module is used to acquire the voltage and current values of the power supply circuit in real time.
[0009] The timing module is used to synchronize the clocks of the instruction module and the voltage and current acquisition module using satellite timing signals;
[0010] The data analysis module is used to output the detonation time of the detonator based on the voltage and current values of the power supply circuit.
[0011] According to the detonation timing monitoring device provided by the present invention, there are multiple power supply circuits, and each power supply circuit is equipped with a detonator.
[0012] According to the present invention, the timing module of the detonation timing monitoring device is a Beidou satellite timing system or a GPS timing system.
[0013] According to the detonation timing monitoring device provided by the present invention, the voltage and current acquisition module includes a high-speed A / D converter, and a voltage acquisition branch and a current acquisition branch respectively connected to the high-speed A / D converter.
[0014] According to the detonation timing monitoring device provided by the present invention, the voltage acquisition branch includes a first filter circuit, a first isolation circuit and a first amplifier connected in sequence, and the current acquisition branch includes a second filter circuit, a second isolation circuit and a second amplifier connected in sequence.
[0015] According to the detonation timing monitoring device provided by the present invention, the high-speed A / D converter samples voltage and current values at a frequency of 10 microseconds / time.
[0016] The present invention also provides an initiation system including the aforementioned initiation timing monitoring device, the initiation system further comprising:
[0017] The high-voltage programmable power supply receives voltage and current adjustment commands from the command module via a communication circuit.
[0018] Each detonator is connected to a corresponding power supply circuit.
[0019] The detonation timing monitoring device provided by this invention achieves accurate monitoring of the detonator detonation time by using satellite timing signals to synchronize the clocks of the command module and the voltage and current acquisition module, and by leveraging the high-rate acquisition of voltage and current values. Attached Figure Description
[0020] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0021] Figure 1 This is a schematic diagram of the detonation timing monitoring device provided by the present invention;
[0022] Figure 2This is a schematic diagram of the detonation system structure with a multi-stage selective firing system provided by the present invention;
[0023] Figure 3 This is a schematic diagram of the ground-based selective firing control ignition panel provided by the present invention;
[0024] Figure 4 This is a schematic diagram of high-speed current and voltage acquisition provided by the present invention;
[0025] Figure 5 This is a schematic diagram of the operation process of the data analysis software provided by the present invention;
[0026] Figure 6 This is a schematic diagram of the current and voltage measurement waveforms provided by the present invention. Detailed Implementation
[0027] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.
[0028] Figure 1 This is a schematic diagram of the detonation timing monitoring device provided by the present invention, as shown below. Figure 1 As shown, the detonation timing monitoring device 100 includes:
[0029] The instruction module 110 is used to send voltage and current adjustment instructions to the power supply circuit to detonate the detonator;
[0030] The voltage and current acquisition module 120 is used to acquire the voltage and current values of the power supply circuit in real time.
[0031] The timing module 130 is used to synchronize the clocks of the instruction module and the voltage and current acquisition module using satellite timing signals;
[0032] The data analysis module 140 is used to output the detonation time of the detonator based on the voltage and current values of the power supply circuit.
[0033] It should be noted that the GPS-synchronized intelligent explosion control method uses a general-purpose GPS OEM board to receive satellite signals, perform three-dimensional positioning and timing of the explosion point, and synchronize the high-precision clocks in the satellite timing signal calibration command module 110 and the voltage and current acquisition module 120. By monitoring the detonator detonation time in this way, compared to ordinary synchronized explosion control methods, it avoids the influence of radio delay time, terrain, and weather, and is more accurate.
[0034] The detonation timing monitoring device provided by this invention achieves accurate monitoring of the detonator detonation time by using satellite timing signals to synchronize the clocks of the command module and the voltage and current acquisition module, and by leveraging the high-rate acquisition of voltage and current values.
[0035] According to the detonation timing monitoring device provided by the present invention, in the present invention, there are multiple power supply circuits, and each power supply circuit is provided with a detonator.
[0036] It should be noted that in the case of multi-level seismic source excitation in a well, the seismic source is located underground, and the multiple seismic sources are arranged vertically in sequence in the deep well. The application environment varies greatly. In this case, each seismic source corresponds to a power supply circuit, and each power supply circuit is equipped with a detonator.
[0037] The detonation timing monitoring device provided by the present invention ensures the independence of each detonation source by setting up a power supply circuit for each seismic source to detonate the detonator on each circuit individually, thereby enabling independent operation.
[0038] According to the detonation timing monitoring device provided by the present invention, the timing module is a Beidou satellite timing system or a GPS timing system.
[0039] It should be noted that the BeiDou / GPS time synchronization universal circuit is adopted, and the BeiDou satellite time synchronization system clock is used as the time base. The calibrated high-precision clock provides the operating frequency of the microcontroller MCU, giving the system high-precision time system support.
[0040] The detonation timing monitoring device provided by this invention synchronizes the clocks of the command module and the voltage and current acquisition module by using the Beidou satellite timing system or the GPS timing system as the timing module, thereby achieving accurate monitoring of detonator detonation.
[0041] According to the detonation timing monitoring device provided by the present invention, the voltage and current acquisition module includes a high-speed A / D converter, and a voltage acquisition branch and a current acquisition branch respectively connected to the high-speed A / D converter.
[0042] The high-speed A / D converter samples voltage and current values at a frequency of 10 microseconds per time.
[0043] It should be noted that the voltage and current during the detonation and ignition process are collected at high speed by a high-speed A / D converter. Based on the reaction principle that the detonation time of the perforation hole is 1µs, the high-speed sampling interval is designed to be 10µs, that is, it is accessed once every 10µs. The voltage and current data curve changes during ignition are collected, and the change point is taken as the detonator detonation point, and the time corresponding to the point is taken as the detonator detonation time.
[0044] The detonation timing monitoring device provided by this invention acquires voltage and current during the detonation and ignition process at high speed through a high-speed A / D converter, obtains a voltage and current curve, and takes the current change point in the curve as the detonator detonation point. Based on this, the detonator detonation time can be accurately monitored.
[0045] Figure 2 This is a schematic diagram of the detonation system structure with a multi-stage selective firing system provided by the present invention, as shown below. Figure 2 As shown, the detonation system includes: a Beidou / GPS timing system connected to the multi-stage selective detonation system and the high-speed current and voltage acquisition and recording system respectively; data analysis software connected to the high-speed current and voltage acquisition and recording system; and a 40-stage selective detonation system consisting of selective detonation 1, selective detonation 2... selective detonation 40 connected to the high-speed current and voltage acquisition and recording system, with each stage matched with a detonator.
[0046] The detonation timing monitoring device provided by this invention can selectively detonate 40 times in a single well run, allowing for controlled sequential detonation of multiple seismic sources underground, significantly improving work efficiency. During detonation, it rapidly samples the current and voltage data of the power supply line to the seismic source unit. By using the transient changes in voltage and current data as thresholds, it accurately records the ignition moment, analyzes and confirms the precise detonation time, solving the problem of accurate detonation timing. Well run verification shows a detonation timing accuracy of 100µs. This timing monitoring method avoids errors caused by time delays in cable lines after power supply and the melting time of detonator bridge wires, resulting in more accurate monitoring. This device can independently perform detonation operations without relying on the control of a ground seismic information recording and acquisition system.
[0047] Figure 3 This is a schematic diagram of the ground-based selective firing control ignition panel provided by the present invention, as shown below. Figure 3 As shown, the ground-based selective launch control ignition panel includes: a BeiDou / GPS timing unit, a processor, an external memory, input buttons, a display, a filter, an isolation circuit, an amplifier, a high-speed A / D converter, a sampling circuit, a communication circuit, a high-voltage programmable power supply, and a 40-level modular seismic source unit.
[0048] According to the detonation timing monitoring device provided by the present invention, the voltage acquisition branch includes a first filter circuit, a first isolation circuit and a first amplifier connected in sequence, and the current acquisition branch includes a second filter circuit, a second isolation circuit and a second amplifier connected in sequence.
[0049] Figure 4 This is a schematic diagram of high-speed current and voltage acquisition provided by the present invention, as shown below. Figure 4 The image shows a high-speed current and voltage acquisition module. This module includes: a sampling resistor, a filter, an isolation circuit, an amplifier, a high-speed A / D converter, and a processor. The voltage and current signals are filtered, isolated, and amplified before entering the high-speed A / D converter.
[0050] The high-speed A / D converter uses a BeiDou / GPS timing chip to provide a 10µs disciplined clock frequency reference as a trigger source, continuously acquiring the voltage and current signals at that moment. The processor synchronously receives UTC (Coordinated Universal Time) time calibration internal high-precision clock to accurately record the precise time of each sampled voltage and current point.
[0051] Figure 5 This is a schematic diagram of the operation flow of the data analysis software provided by the present invention, such as... Figure 5 As shown, the operation flow of the data analysis software is as follows:
[0052] S510, open the file, which comes from the voltage and current acquisition module 130;
[0053] S520, plot the voltage and current curves;
[0054] The S530 uses the current to locate the ignition position via telephone, and the software automatically finds the ignition position and confirms the ignition time.
[0055] Figure 6 This is a schematic diagram of the current and voltage measurement waveforms provided by the present invention, as shown below. Figure 6 As shown, an initiation timing experiment was conducted in a certain well. The ignition output curve was recorded during the initiation process, as follows: Figure 5 As shown in the figure, green represents the voltage curve and red represents the current curve. After the ignition command is sent, the ground instruments begin to supply power, and the voltage and current of the entire circuit will change regularly. When the current reaches the ignition current of the detonator in the well-source system, the detonator bridge wire melts and ignites the explosive source, the power supply circuit is broken, and the current drops to zero instantaneously. The monitoring system accurately records this sudden change, thus confirming the excitation time of the well-source.
[0056] The present invention also provides an initiation system including the aforementioned initiation timing monitoring device, the initiation system further comprising:
[0057] The high-voltage programmable power supply receives voltage and current adjustment commands from the command module via a communication circuit.
[0058] Each detonator is connected to a corresponding power supply circuit.
[0059] The detonation system provided by this invention includes a detonation timing monitoring device. It incorporates BeiDou / GPS timing into the system and provides a time base. When the detonator in the mine is powered by the seismic source, the ignition voltage and current are collected at high speed and sampled at 10µs intervals. The sudden drop in current caused by the circuit break after the detonator detonates is used as the confirmation of the detonation point. The precise time of the detonation point is automatically output through software data analysis.
[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims
1. A detonation timing monitoring device, characterized in that, include: The instruction module is used to send voltage and current adjustment commands to the power supply circuit to detonate the detonator; A voltage and current acquisition module is used to acquire the voltage and current values of the power supply circuit in real time. The timing module is used to synchronize the clocks of the instruction module and the voltage and current acquisition module using satellite timing signals; The data analysis module is used to output the detonation time of the detonator based on the voltage and current values of the power supply circuit.
2. The detonation timing monitoring device according to claim 1, characterized in that, There are multiple power supply circuits, and each power supply circuit is equipped with a detonator.
3. The detonation timing monitoring device according to claim 1, characterized in that, The timing module is either the BeiDou satellite timing system or the GPS timing system.
4. The detonation timing monitoring device according to claim 1, characterized in that, The voltage and current acquisition module includes a high-speed A / D converter, and a voltage acquisition branch and a current acquisition branch respectively connected to the high-speed A / D converter.
5. The detonation timing monitoring device according to claim 4, characterized in that, The voltage acquisition branch includes a first filter circuit, a first isolation circuit, and a first amplifier connected in sequence, and the current acquisition branch includes a second filter circuit, a second isolation circuit, and a second amplifier connected in sequence.
6. The detonation timing monitoring device according to claim 4, characterized in that, The high-speed A / D converter samples voltage and current values at a frequency of 10 microseconds per time.
7. A detonation system comprising the detonation timing monitoring device according to any one of claims 1-6, characterized in that, The detonation system also includes: The high-voltage programmable power supply receives voltage and current adjustment commands from the command module via a communication circuit. Each detonator is connected to a corresponding power supply circuit.