An explosive wire detonator initiation system and method

Abstract

This invention discloses an explosive wire detonator initiation system and method, relating to the field of pyrotechnic initiation measurement and control technology. The system includes an integrated controller and a high-current drive board. The integrated controller is connected to the high-current drive board via a high-voltage cable and is configured to provide the high-current drive board with DC high voltage and trigger pulses, and to receive and process signals fed back from the high-current drive board. The output end of the high-current drive board is connected to the explosive wire detonator via an initiation cable and is configured to instantaneously release stored energy to the explosive wire detonator to complete the initiation when preset conditions are met. This invention uses a gas discharge tube instead of a traditional cold cathode tube as the main switching device and integrates a self-made current sampling unit and a synchronous output unit inside the high-current drive board, significantly reducing the overall system cost and improving the convenience of on-site operation and experimental efficiency.

Description

Technical Field

[0001] This invention relates to the field of pyrotechnic initiation measurement and control technology, specifically to an explosive wire detonator initiation system and method. Background Technology

[0002] Explosive wire detonators are widely used in various detonation fields such as detonation tests and warhead assessments. Their detonation method usually requires the detonation device to achieve short-circuit discharge, and the discharge current front should be fast and have a large amplitude to meet the reliable detonation requirements of high-current pyrotechnics.

[0003] In existing technologies, commonly used explosive wire detonator initiation systems typically employ a cold cathode tube as the core switching discharge device to construct the initiation mechanism. The entire system includes a DC high-voltage charging power supply, a high-voltage DC monitoring meter, a high-voltage pulse generator (igniter), and the initiation device. The high-voltage pulse generator outputs a single negative high-voltage pulse with an amplitude of approximately 8-12 kV and a leading edge of less than 50 ns. The initiation device is internally charged to approximately 7.6 kV via an energy storage capacitor, and then discharged to the load under the control of the cold cathode tube. The system has the following prominent problems in actual use: the procurement cost of the initiation device and the matching synchronous pressure divider box is high, and the cost of a single system often exceeds 300,000 yuan; in high-yield detonation tests, even if the initiation device is placed in a protective box and is accompanied by multiple protective measures such as sand walls and sandbags, the initiation device and connecting cable are still very easily damaged by detonation fragments due to the limited initiation distance and the large destructive force of the detonation, which will cause significant economic losses once damaged; in addition, the main control cable of the system uses a thick high-voltage cable, which limits the control distance. To ensure the safety of the cable, it is usually necessary to pre-bury cable trenches or dig trenches to bury it, which is extremely inconvenient to operate and has high maintenance costs during field tests.

[0004] Therefore, how to significantly reduce the manufacturing and maintenance costs of the detonation system, simplify the system layout and protection procedures, and improve the system's adaptability and ease of operation in destructive detonation tests while ensuring detonation reliability are technical problems that urgently need to be solved in this field. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the present invention aims to provide an explosive wire detonator initiation system and method. This system replaces the traditional cold cathode tube with a gas discharge tube as the main switching device and integrates a self-made current sampling unit and a synchronous output unit within the high-current drive board. This significantly reduces the overall system cost and improves the convenience of on-site operation and testing efficiency.

[0006] To achieve the above objectives, the embodiments of this invention provide the following technical solutions:

[0007] This application provides an explosive wire detonator initiation system, including an integrated controller and a high-current drive board. The integrated controller is connected to the high-current drive board via a high-voltage cable. The integrated controller is configured to provide an adjustable DC high voltage and trigger pulse to the high-current drive board, and to receive and process signals fed back by the high-current drive board. The output terminal of the high-current drive board is used to connect to an explosive detonator via an initiation cable. The high-current drive board is configured to release stored energy to the explosive wire detonator to complete the initiation after receiving the trigger pulse or reaching its own preset voltage threshold.

[0008] Furthermore, the integrated measurement and control unit includes: a DC high-voltage output unit for charging the high-current drive board; a DC high-voltage monitoring unit for online monitoring of the actual charging voltage of the high-current drive board; a trigger pulse generation unit for generating and outputting trigger pulses to the high-current drive board; and a data acquisition unit for acquiring and storing the current monitoring signal and synchronous output signal generated by the high-current drive board.

[0009] Furthermore, the high-current drive board is a trigger-type high-current drive board, comprising: a first input unit for receiving DC high voltage and trigger pulses provided by the integrated controller; a first energy storage unit including an energy storage capacitor bank, the energy storage capacitor bank including at least one capacitor; a first trigger unit including a first gas discharge tube and a second gas discharge tube connected in series in the main discharge circuit, one end of the second gas discharge tube being grounded; a first synchronization output unit for generating a synchronization pulse signal indicating the detonation time; a first high-voltage output unit for discharging the externally connected explosive wire detonator; and a first current sampling unit for sensing the discharge current and outputting a current monitoring signal.

[0010] Furthermore, the second gas discharge tube is provided with a trigger input terminal for receiving the trigger pulse output by the trigger pulse generation unit of the integrated measurement and control unit. When the trigger pulse is applied to the trigger input terminal of the second gas discharge tube to make it conduct, the first gas discharge tube breaks down and conducts due to overvoltage, thereby connecting the entire discharge circuit.

[0011] Furthermore, the first gas discharge tube and the second gas discharge tube are respectively connected in parallel with voltage equalization resistors. The voltage equalization resistors are used to ensure that the two tubes share the voltage across the two ends of the energy storage unit when they are in the off state.

[0012] Furthermore, the current sampling unit includes a self-integrating current loop built into the high-current drive board. The self-integrating current loop is configured to sense the pulse current of the discharge circuit in a non-contact manner, and the peak current measurement error compared with a commercial current sensor is less than a first preset threshold.

[0013] Furthermore, the first synchronization output unit is configured to output two fast pulse synchronization signals with amplitudes greater than 100V, leading edges less than 50ns, and pulse widths greater than 500ns.

[0014] Furthermore, the high-current drive board is a self-breakdown type high-current drive board, comprising: a second input unit for receiving DC high voltage provided by the integrated measurement and control unit; a second energy storage unit including an energy storage capacitor bank, the energy storage capacitor bank including at least one capacitor; a second switching unit including a single gas discharge tube, the single gas discharge tube being connected in series in the main discharge circuit; a second synchronization output unit for generating a synchronization pulse signal indicating the detonation time; a second high-voltage output unit for discharging to an externally connected explosive wire detonator; and a second current sampling unit for sensing the discharge current and outputting a current monitoring signal.

[0015] Furthermore, the self-breakdown high-current drive board also includes a voltage monitoring port, which is used to monitor the actual charging voltage across the energy storage capacitor bank in real time.

[0016] Accordingly, this application also provides a method for initiating an explosive wire detonator, comprising the following steps: charging an energy storage unit within a high-current drive board based on a DC high voltage provided by an integrated measurement and control unit; when a preset condition is met, the main discharge circuit inside the high-current drive board is turned on, allowing the electrical energy stored in the energy storage unit to be released to the explosive wire detonator through an initiation cable, and the output peak current is not less than a second preset threshold; simultaneously with the discharge, a current sampling unit built into the high-current drive board senses and outputs a current monitoring signal, and a synchronization output unit generates and outputs a synchronization pulse signal; the integrated measurement and control unit receives and records the current monitoring signal and the synchronization pulse signal; wherein, when the high-current drive board is a self-breakdown type, the preset condition is that the charging voltage of the energy storage unit reaches the DC breakdown voltage of a single gas discharge tube; when the high-current drive board is a trigger type, the preset condition is that after the energy storage unit is charged to a predetermined value lower than the total breakdown voltage of the first and second gas discharge tubes connected in series, a trigger pulse is applied to the gas discharge tube near the ground by the integrated measurement and control unit.

[0017] The beneficial effects of this invention are as follows: By adopting a two-level architecture of the DDL-21 integrated controller and the DDL-21 high-current drive board, the integrated controller centrally realizes all functions of charging, triggering, monitoring, and data acquisition, replacing multiple separate devices in the traditional system and greatly simplifying the system structure. The high-current drive board uses a low-cost ceramic gas discharge tube as the core switch, which is inexpensive and can be used as a disposable consumable. In high-yield detonation tests, no cumbersome protection is required, avoiding high losses caused by equipment damage. The high-voltage cable uses a universal cable with no length limit for transmission. The detonation cable uses silicone rubber high-voltage wire and SYV50-2 coaxial cable, which can be quickly cut and reused after damage. The system's adaptability to all scenarios and testing efficiency are greatly improved, while fully meeting the reliable detonation requirements of No. 21 and similar high-current explosive wire detonators. Attached Figure Description

[0018] Figure 1 This application provides a schematic diagram of the structure of an explosive wire detonator initiation system.

[0019] Figure 2 A flowchart illustrating a method for initiating an explosive wire detonator, provided as an embodiment of this application;

[0020] Figure 3 A circuit diagram of a self-breaking-down high-current drive board in an explosive wire detonator initiation system provided in this application embodiment;

[0021] Figure 4 A circuit diagram of a trigger-type high-current drive board in an explosive wire detonator initiation system provided in this application embodiment;

[0022] Figure 5 This is a schematic diagram of the internal unit logic of an integrated measuring and control device in an explosive wire detonator initiation system provided in an embodiment of this application. Detailed Implementation

[0023] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of the present invention.

[0024] In this invention, the terms "system" and "network" are used interchangeably. "Multiple" refers to two or more; therefore, in this invention, "multiple" can also be understood as "at least two." "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. Additionally, the character " / ", unless otherwise specified, generally indicates that the preceding and following related objects have an "or" relationship. Furthermore, it should be understood that in the description of this invention, terms such as "first" and "second" are used only for descriptive purposes and should not be construed as indicating or implying relative importance or order.

[0025] Example 1:

[0026] like Figure 1 , Figures 3-5 As shown in the figure, this application provides an explosive wire detonator initiation system, including an integrated controller and a high-current drive board. The integrated controller is connected to the high-current drive board via a high-voltage cable. The integrated controller is configured to provide an adjustable DC high voltage and trigger pulse to the high-current drive board, and to receive and process signals fed back by the high-current drive board. The output terminal of the high-current drive board is used to connect to an explosive detonator via an initiation cable. The high-current drive board is configured to release stored energy to the explosive wire detonator to complete the initiation after receiving the trigger pulse or reaching its own preset voltage threshold.

[0027] In another possible embodiment, the DDL-21 integrated controller is stably connected to the DDL-21 high-current drive board via a general high-voltage cable, ensuring a secure and tight connection. Then, the high-voltage output unit of the high-current drive board is reliably connected to the No. 21 explosive wire detonator via a detonation cable no longer than 7 meters. During connection, ensure correct wiring to avoid short circuits or poor contact. After connection, the DDL-21 integrated controller is activated. Upon power-up, the integrated controller automatically enters working mode, and its internal DC high-voltage output unit continuously outputs adjustable DC high voltage, which is stably transmitted to the DDL-21 high-current drive board via the high-voltage cable to charge the energy storage unit inside the drive board. Simultaneously, the integrated controller generates corresponding high-voltage trigger pulses through the trigger pulse generation unit according to the test control commands, and transmits the pulse signal... The signal is precisely transmitted to the trigger interface of the high-current drive board. After receiving the DC high voltage, the high-current drive board transmits the electrical energy to the energy storage unit through the input unit to complete the internal energy storage. When the drive board reaches the preset detonation conditions, the internal main discharge circuit will be connected instantly, and the stored high-voltage electrical energy will be quickly released to the explosive wire detonator to complete the reliable detonation of the detonator. During this process, the first synchronous output unit inside the high-current drive board will generate a synchronous pulse signal, and the current sampling unit will sense the discharge current in real time and output a current monitoring signal. These two signals will be synchronously fed back to the DDL-21 integrated measurement and control unit. The data acquisition unit of the integrated measurement and control unit will receive, process and store all feedback signals in real time, and monitor the charging status, discharge current, synchronization timing and other working parameters of the system in real time throughout the process to ensure the safety and stability of the test process.

[0028] By adopting a two-level architecture of the DDL-21 integrated controller and the DDL-21 high-current drive board, the integrated controller centrally realizes all functions of charging, triggering, monitoring, and data acquisition, replacing multiple separate devices in the traditional system and greatly simplifying the system structure. The high-current drive board uses a low-cost ceramic gas discharge tube as the core switch, which is inexpensive and can be used as a disposable consumable. In high-yield detonation tests, no cumbersome protection is required, avoiding high losses caused by equipment damage. The high-voltage cable uses a universal cable with no length limit for transmission. The detonation cable uses silicone rubber high-voltage conductor and SYV50-2 coaxial cable, which can be quickly cut and reused after damage. The system's adaptability to all scenarios and testing efficiency are greatly improved, while fully meeting the reliable detonation requirements of No. 21 and similar high-current explosive wire detonators.

[0029] Traditional detonation systems rely on multiple separate devices for DC high-voltage charging, charging voltage monitoring, trigger pulse generation, and signal acquisition. These devices consist of a large number of components, including a DC high-voltage charging power supply, a high-voltage DC monitoring meter, a high-voltage pulse generator, and independent data acquisition equipment. The complex wiring and the need for at least one operator and two laborers to work together during commissioning not only occupy a significant amount of test site space but also make the system prone to failure due to wiring errors. This results in extremely low overall commissioning efficiency and makes the equipment inconvenient to carry and transport, making it particularly unsuitable for field testing.

[0030] In embodiments of this application, the integrated measurement and control device includes: a DC high-voltage output unit for charging the high-current drive board; a DC high-voltage monitoring unit for online monitoring of the actual charging voltage of the high-current drive board; a trigger pulse generation unit for generating and outputting trigger pulses to the high-current drive board; and a data acquisition unit for acquiring and storing the current monitoring signal and synchronous output signal generated by the high-current drive board.

[0031] In another possible embodiment, the DDL-21 integrated controller starts working after being connected to a 220V AC power supply. Its internal DC high-voltage output unit outputs an adjustable DC high voltage according to the test requirements. This high voltage is stably transmitted to the input unit of the DDL-21 high-current drive board via a high-voltage cable, providing charging energy to the energy storage unit inside the drive board. During charging, the DC high-voltage monitoring unit inside the integrated controller connects to the energy storage unit or voltage monitoring port of the high-current drive board via a dedicated monitoring cable, collecting the actual voltage data of the energy storage unit in real time. This voltage data is converted into a displayable electrical signal and fed back to the display interface of the integrated controller in real time. Operators can visually view the changes in the energy storage voltage through the display interface to ensure... When the energy storage condition meets the test requirements and the energy storage voltage reaches the preset value, the trigger pulse generation unit of the integrated measurement and control unit will generate a corresponding high-voltage trigger pulse according to the test detonation command. This pulse signal is transmitted to the trigger interface of the high-current drive board through the trigger cable to control the drive board to conduct and discharge. At the same time, the data acquisition unit of the integrated measurement and control unit will continuously receive the current monitoring signal and synchronous output signal fed back by the high-current drive board. It will perform real-time acquisition, waveform display and data storage of these two signals. The stored data can be used for subsequent test analysis to ensure the integrity and traceability of the test data. In addition, the integrated measurement and control unit can also provide standard TTL signals, optical pulses and other synchronous signals to provide drive signals for external optical measurement and other systems to realize the collaborative work of multiple devices.

[0032] The DDL-21 integrated controller highly integrates four functional units: DC high-voltage output, DC high-voltage monitoring, trigger pulse generation, and data acquisition. This enables centralized control of all functions without the need for separate equipment, significantly reducing the number of system devices and simplifying the wiring process. Operators can complete all debugging operations by a single person without the need for coordination, which not only reduces the difficulty of operation but also reduces the probability of wiring errors. System stability and debugging efficiency are significantly improved. At the same time, the integrated design makes the device compact and portable, suitable for precision indoor testing and large-scale outdoor testing, solving the problems of traditional system equipment being scattered and inconvenient to carry.

[0033] Traditional trigger-type detonation devices use expensive cold cathode tubes for their discharge switches, resulting in high costs. Furthermore, they require high-performance triggering conditions, necessitating a fast-pulse high-voltage pulse source with stable performance. These high-voltage pulse signal sources are inherently expensive, and the synchronous output signal and current monitoring functions require external independent equipment. This not only increases system complexity but also raises operating costs. Overall, their reliability and convenience are insufficient, making them unsuitable for the needs of precision detonation tests.

[0034] In the embodiments of this application, the high-current drive board is a trigger-type high-current drive board, comprising: a first input unit for receiving DC high voltage and trigger pulses provided by the integrated controller; a first energy storage unit including an energy storage capacitor bank, the energy storage capacitor bank including at least one capacitor; a first trigger unit including a first gas discharge tube and a second gas discharge tube connected in series in the main discharge circuit, one end of the second gas discharge tube being grounded; a first synchronization output unit for generating a synchronization pulse signal indicating the detonation time; a first high-voltage output unit for discharging to an externally connected explosive wire detonator; and a first current sampling unit for sensing the discharge current and outputting a current monitoring signal.

[0035] In another possible embodiment, after the trigger-type DDL-21 high-current drive board is connected to the system, it is first stably connected to the high-voltage output terminal and trigger output terminal of the DDL-21 integrated controller through the interface of the first input unit to ensure stable transmission of electrical energy and trigger signals. After receiving the DC high-voltage charging energy and trigger pulse control signal transmitted by the integrated controller, the first input unit transmits the DC high-voltage energy to the first energy storage unit without loss and transmits the trigger pulse signal to the first trigger unit. The first energy storage unit consists of four polypropylene metallized film capacitors connected in parallel, which can quickly store the detonation energy provided by the DC high voltage and reserve sufficient energy for instantaneous high-current output. The first trigger unit consists of two ceramic gas discharge tubes connected in series, namely the first gas discharge tube and the second gas discharge tube, wherein one end of the second gas discharge tube is grounded, specifically for... Used to receive external trigger signals, the first synchronous output unit is linked with the first energy storage unit and the first trigger unit. At the moment the drive board is turned on for discharge, it generates two synchronous pulse signals that indicate the detonation time. One signal is used to feed back to the integrated measurement and control unit, and the other signal is used to provide a unified time reference for external test equipment such as oscilloscopes and data acquisition cards. The first high-voltage output unit is connected to the explosive wire detonator through a detonation cable. When the first trigger unit is turned on, it will quickly release the high-voltage electrical energy stored in the first energy storage unit to the external explosive wire detonator to complete the detonation action. The first current sampling unit adopts a built-in self-integrating current loop, which is fitted on the main discharge circuit to sense the magnitude of the discharge current in the main discharge circuit in real time, convert the current signal into a corresponding voltage monitoring signal, and transmit it to the data acquisition unit of the integrated measurement and control unit to realize real-time monitoring of the discharge current.

[0036] The DDL-21 high-current drive board, featuring a modular, integrated design, utilizes a commercially available ceramic gas discharge tube as its core discharge switch. Compared to traditional cold cathode tubes, this significantly reduces costs. Internally, it integrates functional modules such as a first input unit, first energy storage unit, first trigger unit, first synchronous output unit, first high-voltage output unit, and first current sampling unit. It can independently complete the entire process of energy storage, triggering, discharge, and signal output without any external auxiliary equipment, simplifying the system structure. The trigger unit employs two gas discharge tubes connected in series, coupled with a voltage equalization resistor design, ensuring triggering accuracy and detonation timing stability. The first synchronous output unit and current sampling unit are integrated on the board, eliminating the need for external equipment and further reducing operating costs. Overall operational stability and convenience are significantly improved, fully meeting the requirements of precision detonation testing.

[0037] The main disadvantages of traditional trigger-type discharge switches are their high price, high cost, high requirements for triggering conditions, and limited triggering distance, which is generally no more than 100 meters.

[0038] In an embodiment of this application, the second gas discharge tube is provided with a trigger input terminal for receiving the trigger pulse output by the trigger pulse generation unit of the integrated measurement and control device. When the trigger pulse is applied to the trigger input terminal of the second gas discharge tube to make it conduct, the first gas discharge tube breaks down and conducts due to overvoltage, thereby connecting the entire discharge circuit.

[0039] In another possible embodiment, when the trigger-type DDL-21 high-current drive board is working, the DC high-voltage output unit of the DDL-21 integrated controller first charges the first energy storage unit of the drive board. The charging voltage is set according to the test requirements. This voltage value is lower than the total breakdown voltage of the two series-connected gas discharge tubes to ensure that the main discharge circuit remains safely disconnected during the charging phase, avoiding premature conduction that could lead to detonation failure. When the first energy storage unit is charged to the preset voltage value and all test preparations are complete, the operator issues a detonation command through the integrated controller. The trigger pulse generation unit of the integrated controller immediately generates a negative high-voltage trigger pulse, which is transmitted through the trigger cable. Upon reaching the trigger input terminal of the second gas discharge tube, the second gas discharge tube quickly conducts under the action of the trigger pulse. After the second gas discharge tube conducts, the two ends of the first gas discharge tube will instantly experience an overvoltage exceeding its rated withstand value. According to the physical characteristics of the gas discharge tube, the first gas discharge tube will be quickly broken down and conduct. When both gas discharge tubes are conducting, the entire main discharge circuit is fully connected. The high-voltage electrical energy stored in the first energy storage unit is quickly released to the explosive wire detonator through the high-voltage output unit to complete the precise detonation operation. At the same time, the first synchronization output unit generates a synchronization pulse signal, which is fed back to the integrated measurement and control unit to record the detonation time. The current sampling unit starts to collect the discharge current signal synchronously.

[0040] By employing a conduction logic that first triggers the second gas discharge tube near the ground and then drives the first gas discharge tube to break down due to overvoltage, precise timing control of the main discharge circuit is achieved. The trigger jitter is ≤50ns, which significantly reduces the delay time from external triggering to synchronous output. The controllability and consistency of the detonation moment are extremely strong, fully meeting the timing accuracy requirements of precision detonation tests and warhead assessments, ensuring the accuracy of test data. At the same time, the conduction logic is simple and reliable, reducing the probability of drive board failure.

[0041] If there is uneven voltage distribution, a single device will be subjected to excessively high voltage for a long time, which can easily lead to premature breakdown, failure, and other faults. This can cause the driver board to be unstable, have a shortened service life, or even fail to detonate, thus affecting the smooth progress of the test.

[0042] In the embodiments of this application, the first gas discharge tube and the second gas discharge tube are respectively connected in parallel with voltage equalization resistors. The voltage equalization resistors are used to ensure that the two tubes share the voltage across the two ends of the energy storage unit when they are in the off state.

[0043] In another possible embodiment, in the circuit design of the trigger-type DDL-21 high-current drive board, two equalizing resistors are connected in parallel across the first and second gas discharge tubes, respectively. The equalizing resistors are 5W 100MΩ high-power resistors to ensure they can withstand high voltage and operate stably. During the DC high-voltage charging phase of the drive board, the high voltage of the first energy storage unit is evenly applied across the two series-connected gas discharge tubes. At this time, the equalizing resistors connected in parallel across the two gas discharge tubes will synchronously play a balancing role. Through the voltage division characteristics of the resistors, the voltage across the two gas discharge tubes in the off state remains completely consistent, preventing uneven voltage distribution where one device has excessively high voltage and the other has excessively low voltage. This fundamentally avoids the problem of premature breakdown or permanent failure of a single gas discharge tube due to prolonged overvoltage, ensuring that both discharge tubes are always in a safe operating state and can conduct synchronously when receiving a trigger signal, guaranteeing the stable connection of the main discharge circuit and thus ensuring the reliability and consistency of the detonation action.

[0044] By connecting equalizing resistors in parallel across the two series-connected gas discharge tubes, the voltage of the energy storage unit is evenly distributed between the two gas discharge tubes in the off state through the voltage division effect of the equalizing resistors. This avoids damage to a single device due to overvoltage, greatly improves the working stability and service life of the drive board, ensures the consistency and reliability of triggering and conduction, and reduces the probability of detonation failure. At the same time, the equalizing resistors are low-cost, high-power resistors, which will not increase the system cost.

[0045] Traditional detonation systems require expensive commercial dedicated current sensors for current monitoring, resulting in extremely high procurement costs. Furthermore, these sensors require external installation, complex wiring, and occupy additional test space, while also increasing the system's usage and maintenance costs. They are not suitable for low-cost and convenient testing requirements.

[0046] In an embodiment of this application, the current sampling unit includes a self-integrating current loop built into the high-current drive board. The self-integrating current loop is configured to sense the pulse current of the discharge circuit in a non-contact manner, and the peak current measurement error compared with a commercial current sensor is less than a first preset threshold.

[0047] In another possible embodiment, a self-integrating current loop is non-contactly mounted on the main discharge circuit of the trigger-type DDL-21 high-current drive board. This self-integrating current loop is designed with a bandwidth of 10MHz, sensitivity of 0.01V / A, and linearity of ±0.5%. It requires no external integrating circuit and can directly convert electromagnetic induction signals into current monitoring signals. When the main discharge circuit is turned on and outputs a large current, the current loop senses the magnitude and trend of the discharge current in real time through electromagnetic induction, converting the pulse current signal into a corresponding voltage monitoring signal. This voltage monitoring signal is stably transmitted to the data acquisition unit of the DDL-21 integrated controller via a dedicated cable. After processing by the integrated controller, it accurately reflects the true value of the discharge current for real-time viewing by operators. Simultaneously, the current data is stored for subsequent experimental analysis. Compared with the measurement results of the traditional commercial Pearson-8532 current sensor, the peak current measurement error is <1.5%, fully meeting the accuracy requirements of detonation testing for current monitoring. Furthermore, the built-in design requires no additional installation space, simplifies wiring, and avoids the problems of complex wiring and easy damage associated with external sensors.

[0048] By incorporating a self-integrating current loop as the current sampling unit within the driver board, and designing it entirely in accordance with the specifications, there is no need for an external, expensive commercial current sensor, significantly reducing costs. Compared with the commercial Pearson-8532 standard current sensor, the peak current measurement error is <1.5%, and the monitoring accuracy fully meets the test requirements. The non-contact electromagnetic induction current acquisition method does not affect the normal operation of the main discharge circuit. Furthermore, the built-in design requires no additional installation space, making wiring simpler and maintenance more convenient, further enhancing the system's convenience and economy.

[0049] In the embodiments of this application, the first synchronization output unit is configured to output two fast pulse synchronization signals with amplitude greater than 100V, leading edge less than 50ns, and pulse width greater than 500ns.

[0050] In another possible embodiment, at the instant the main discharge circuit of the trigger-type DDL-21 high-current drive board is turned on for discharge, the synchronization output unit will simultaneously generate two synchronization pulse signals. These synchronization pulse signals have the characteristics of amplitude > 100V, leading edge < 50ns, and pulse width > 500ns, belonging to high-voltage fast-leading-edge pulse signals. One signal is transmitted to the data acquisition unit of the DDL-21 integrated test and control unit through a standard BNC cable for system self-testing and detonation time recording, ensuring that the integrated test and control unit can accurately grasp the detonation sequence. The other signal is transmitted to external test instruments such as oscilloscopes, data acquisition cards, and optical measurement equipment through a standard BNC interface, providing a unified detonation time reference for all test equipment, realizing high-precision time synchronization of the entire test system, ensuring that all equipment starts data acquisition at the same time, avoiding inaccurate or incomplete test data caused by timing deviations, and ensuring the reliability of test results.

[0051] The synchronous output unit of the trigger-type DDL-21 high-current drive board ensures precise synchronization between the detonation time and the acquisition time of the test equipment, greatly improving the accuracy and completeness of the test data. At the same time, the synchronization signal can be directly transmitted to the integrated controller and external test equipment without the need for external signal amplification or conversion equipment, simplifying the system structure.

[0052] In the embodiments of this application, the high-current drive board is a self-breakdown type high-current drive board, comprising: a second input unit for receiving DC high voltage provided by the integrated measurement and control unit; a second energy storage unit including an energy storage capacitor bank, the energy storage capacitor bank including at least one capacitor; a second switching unit including a single gas discharge tube, the single gas discharge tube being connected in series in the main discharge circuit; a second synchronization output unit for generating a synchronization pulse signal indicating the detonation time; a second high-voltage output unit for discharging to an externally connected explosive wire detonator; and a second current sampling unit for sensing the discharge current and outputting a current monitoring signal.

[0053] In another possible embodiment, after the self-breakdown type DDL-21 high-current drive board is connected to the system, the second input unit directly receives the DC high-voltage charging energy output from the integrated controller via a dedicated cable, without the need for a trigger cable. The second input unit stably transmits the DC high-voltage energy to the second energy storage unit, which consists of four polypropylene metallized film capacitors connected in parallel, enabling rapid storage of high-voltage energy. A single ceramic gas discharge tube from the second switching unit is connected in series in the main discharge circuit; this gas discharge tube is Φ8×6. The model with a diameter of mm and a withstand voltage of 7.5kV±10% maintains an insulated and disconnected state when the second energy storage voltage does not reach the DC breakdown voltage of the gas discharge tube. The second energy storage unit continues to charge. When the charging voltage of the second energy storage unit gradually rises to the DC breakdown voltage threshold of the gas discharge tube, the gas discharge tube will automatically break down and conduct, quickly connecting the main discharge circuit. The high-voltage electrical energy stored in the second energy storage unit is instantly released to the external No. 21 explosive wire detonator through the second high-voltage output unit to complete the detonation operation. At the same time, the second synchronization output unit generates two fast leading edge synchronization pulse signals. One is fed back to the integrated measurement and control unit, and the other is used for synchronization of external test equipment. The self-made self-integrating current loop of the second current sampling unit senses the discharge current in real time and outputs the current monitoring signal to the integrated measurement and control unit to complete the current monitoring and data retention.

[0054] The self-breakdown type DDL-21 high-current drive board uses a single ceramic gas discharge tube as the switching unit, resulting in a simpler structure. It eliminates the need for external pulse signals and automatically turns on when the energy storage voltage reaches the DC breakdown voltage of the gas discharge tube, making it more convenient to use. The core components are low-cost ceramic gas discharge tubes and parallel metal oxide film capacitors, which are inexpensive and can be used as disposable consumables without complex protection, further reducing costs. It is suitable for scenarios that do not require precise timing control, such as conventional detonation tests and simple field tests. It complements the trigger-type drive board, improving the system's versatility.

[0055] In embodiments of this application, the self-breakdown high-current drive board further includes a voltage monitoring port, which is used to monitor the actual charging voltage across the energy storage capacitor bank in real time.

[0056] In another possible embodiment, the voltage monitoring port of the self-breakdown type DDL-21 high-current drive board is reliably connected directly to both ends of the energy storage capacitor bank inside the drive board, ensuring accurate acquisition of the actual charging voltage of the capacitor bank. Throughout the DC high-voltage charging process, the voltage monitoring port will acquire the voltage data of the capacitor bank in real time, convert the voltage data into a transmittable electrical signal, and stably transmit it to the DC high-voltage monitoring unit of the DDL-21 integrated controller through a dedicated monitoring cable. After processing the voltage signal, the integrated controller will display the real-time value of the energy storage voltage on the display interface. The operator can use this value to monitor the energy storage status throughout the process and accurately determine whether the voltage has reached the DC breakdown voltage threshold of the gas discharge tube. When the voltage reaches the threshold, it can be confirmed that the detonation conditions have been met, and the gas discharge tube will automatically conduct to complete the detonation. This effectively avoids detonation failure due to insufficient charging or damage to the energy storage capacitor and gas discharge tube due to overcharging, ensuring the smooth progress of the test and extending the service life of the device.

[0057] The self-breakdown type DDL-21 high-current drive board is equipped with a dedicated voltage monitoring port, which can collect the actual charging voltage of the energy storage capacitor bank in real time and feed the voltage signal back to the integrated controller. This allows operators to intuitively grasp the energy storage status throughout the process, accurately determine whether the voltage has reached the breakdown threshold of the gas discharge tube, ensure that the detonation conditions are stable and meet the standards, greatly improve the detonation success rate, and avoid device damage caused by overcharging, thus reducing losses and costs.

[0058] Example 2:

[0059] Reference Figure 2 This application also provides a method for initiating an explosive wire detonator, comprising the following steps: charging an energy storage unit within a high-current drive board based on a DC high voltage provided by an integrated measurement and control unit; when a preset condition is met, the main discharge circuit inside the high-current drive board is turned on, allowing the electrical energy stored in the energy storage unit to be released to the explosive wire detonator through an initiation cable, and the output peak current is not less than a second preset threshold; simultaneously with the discharge, a current sampling unit built into the high-current drive board senses and outputs a current monitoring signal, and a synchronization output unit generates and outputs a synchronization pulse signal; the integrated measurement and control unit receives and records the current monitoring signal and the synchronization pulse signal; wherein, when the high-current drive board is a self-breakdown type, the preset condition is that the charging voltage of the energy storage unit reaches the DC breakdown voltage of a single gas discharge tube; when the high-current drive board is a trigger type, the preset condition is that after the energy storage unit is charged to a predetermined value lower than the total breakdown voltage of the first and second gas discharge tubes connected in series, the integrated measurement and control unit applies a trigger pulse to the gas discharge tube near the ground.

[0060] In another possible embodiment, before the detonation operation is formally initiated, a corresponding high-current drive board is selected according to the test requirements. If a precision test requires accurate timing, a trigger-type DDL-21 high-current drive board is selected and connected to the high-voltage output terminal and trigger output terminal of the integrated measurement and control unit. If a routine test does not require accurate timing, a self-breakdown type DDL-21 high-current drive board is selected and only connected to the high-voltage output terminal of the integrated measurement and control unit. Then, the drive board is reliably connected to the No. 21 explosive wire detonator via the detonation cable. After the system setup is completed, the DDL-21 integrated measurement and control unit is started, and the detonation process officially begins. First, the adjustable DC high voltage output unit of the integrated measurement and control unit outputs a high voltage DC power, which is transmitted to the high-current drive board via a high-voltage cable. This continuously charges the energy storage capacitor bank inside the drive board, gradually storing the high-voltage electrical energy required for detonation. During the charging process, the DC high-voltage monitoring unit of the integrated measurement and control unit monitors the energy storage voltage in real time through the voltage monitoring port of the drive board (for self-breakdown type high-current drive boards) or by direct acquisition (for trigger type high-current drive boards). Operators can view the charging status through the display interface of the integrated measurement and control unit. When the system reaches the preset detonation conditions, the main discharge circuit inside the drive board is quickly connected. When using a self-breaking-down type drive board, the preset detonation condition is that the energy storage unit voltage reaches the DC breakdown voltage of the gas discharge tube, and the gas discharge tube automatically conducts. When using a trigger type drive board, the preset detonation condition is that after the energy storage unit is charged to a predetermined value, the integrated controller applies a trigger pulse to the second gas discharge tube near the grounding terminal, triggering both tubes to conduct. After the main discharge circuit is connected, the electrical energy stored in the energy storage unit is instantly released to the explosive wire detonator through the detonation cable, outputting a large current that meets the detonation requirements, completing the detonator detonation. At the same time as the discharge detonation, the self-integrating current loop inside the drive board will sense the discharge current in real time and output a current monitoring signal. The measurement signal and the synchronous output unit synchronously generate a fast leading edge synchronization pulse signal. These two signals are received, collected and stored in real time by the data acquisition unit of the integrated measurement and control unit, completing the complete retention of test data. After the detonation is completed, the integrated measurement and control unit automatically stops charging, and the operator can view the test data. If it is a one-time use scenario, the drive board can be directly replaced for the next test without the need for protection and maintenance of the drive board. That is, the high current drive board can be used as a consumable part. In the high-yield detonation test, it can be used once without complicated protection, and the replacement cost after damage is extremely low. The integrated measurement and control unit is located in a remote test chamber and can be reused.

[0061] The optional embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the embodiments of the present invention are not limited to the specific details in the above embodiments. Within the scope of the technical concept of the embodiments of the present invention, various simple modifications can be made to the technical solutions of the embodiments of the present invention, and these simple modifications all fall within the protection scope of the embodiments of the present invention.

[0062] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the embodiments of the present invention will not describe the various possible combinations separately.

[0063] Furthermore, various different implementations of the present invention can be combined arbitrarily, as long as they do not violate the spirit of the present invention, they should also be regarded as the content disclosed in the present invention.

Claims

1. An explosive wire detonator initiation system, characterized in that, It includes an integrated measurement and control unit and a high-current drive board. The integrated measurement and control unit is connected to the high-current drive board via a high-voltage cable. The integrated measurement and control unit is configured to provide an adjustable DC high voltage and trigger pulse to the high-current drive board, and to receive and process signals fed back by the high-current drive board. The output end of the high-current drive board is used to connect to the detonator via the detonation cable. The high-current drive board is configured to release stored energy to the detonator to complete the detonation after receiving a trigger pulse or reaching its own preset voltage threshold.

2. The explosive wire detonator initiation system according to claim 1, characterized in that, The integrated measurement and control device includes: A DC high-voltage output unit is used to charge the high-current drive board; A DC high-voltage monitoring unit is used to monitor the actual charging voltage of the high-current drive board online. A trigger pulse generation unit is used to generate and output trigger pulses to the high-current drive board. The data acquisition unit is used to acquire and store the current monitoring signals and synchronous output signals generated by the high-current drive board.

3. The explosive wire detonator initiation system according to claim 1, characterized in that, The high-current drive board is a trigger-type high-current drive board, comprising: The first input unit is used to receive the DC high voltage and trigger pulse provided by the integrated measurement and control unit; The first energy storage unit includes an energy storage capacitor bank, wherein the energy storage capacitor bank includes at least one capacitor; The first triggering unit includes a first gas discharge tube and a second gas discharge tube connected in series in the main discharge circuit, with one end of the second gas discharge tube grounded. The first synchronization output unit is used to generate a synchronization pulse signal indicating the detonation time; The first high-voltage output unit is used to discharge to the externally connected explosive wire detonator; The first current sampling unit is used to sense the discharge current and output a current monitoring signal.

4. The explosive wire detonator initiation system according to claim 3, characterized in that, The second gas discharge tube is provided with a trigger input terminal for receiving the trigger pulse output by the trigger pulse generation unit of the integrated measuring and controlling device. When the trigger pulse is applied to the trigger input terminal of the second gas discharge tube to make it conduct, the first gas discharge tube breaks down and conducts due to overvoltage, thereby connecting the entire discharge circuit.

5. The explosive wire detonator initiation system according to claim 4, characterized in that, The first gas discharge tube and the second gas discharge tube are respectively connected in parallel with voltage equalization resistors. The voltage equalization resistors are used to ensure that the two tubes share the voltage across the two ends of the energy storage unit when they are in the off state.

6. The explosive wire detonator initiation system according to claim 3, characterized in that, The current sampling unit includes a self-integrating current loop built into the high-current drive board. The self-integrating current loop is configured to sense the pulse current of the discharge circuit in a non-contact manner, and the peak current measurement error compared with a commercial current sensor is less than a first preset threshold.

7. The explosive wire detonator initiation system according to claim 3, characterized in that, The first synchronization output unit is configured to output two fast pulse synchronization signals with an amplitude greater than 100V, a leading edge of less than 50ns, and a pulse width greater than 500ns.

8. The explosive wire detonator initiation system according to claim 1, characterized in that, The high-current drive board is a self-breakdown type high-current drive board, comprising: The second input unit is used to receive the DC high voltage provided by the integrated measurement and control unit; The second energy storage unit includes an energy storage capacitor bank, wherein the energy storage capacitor bank includes at least one capacitor; The second switching unit includes a single gas discharge tube, which is connected in series in the main discharge circuit; The second synchronization output unit is used to generate a synchronization pulse signal indicating the detonation time; The second high-voltage output unit is used to discharge externally connected explosive wire detonators; The second current sampling unit is used to sense the discharge current and output a current monitoring signal.

9. The explosive wire detonator initiation system according to claim 8, characterized in that, The self-breakdown high-current drive board also includes a voltage monitoring port, which is used to monitor the actual charging voltage across the energy storage capacitor bank in real time.

10. A method for initiating an explosive wire detonator, applied to the explosive wire detonator initiation system as described in any one of claims 1-9, characterized in that, Includes the following steps: The energy storage unit inside the high-current drive board is charged by the DC high voltage provided by the integrated measurement and control unit. When the preset conditions are met, the main discharge circuit inside the high current drive board is turned on, so that the electrical energy stored in the energy storage unit is released to the detonator through the detonation cable, and the output peak current is not less than the second preset threshold. While discharging, the current sampling unit built into the high-current drive board senses and outputs a current monitoring signal, and the synchronous output unit generates and outputs a synchronous pulse signal. The integrated measurement and control unit receives and records current monitoring signals and synchronization pulse signals; When the high-current drive board is self-breakdown type, the preset condition is that the charging voltage of the energy storage unit reaches the DC breakdown voltage of a single gas discharge tube; when the high-current drive board is trigger type, the preset condition is that after the energy storage unit is charged to a predetermined value lower than the total breakdown voltage of the first and second gas discharge tubes connected in series, the integrated controller applies a trigger pulse to the gas discharge tube near the ground.

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