Initiation control circuit of initiating explosive device

By introducing detection circuits and ignition circuits into the pyrotechnic detonation control circuit, the system status is monitored in real time and the current direction is controlled, the safety hazards and stability problems during the pyrotechnic detonation process in the prior art are solved, and higher reliability is achieved Sex and safety.

CN222353021UActive Publication Date: 2025-01-14NANJING UNIV OF SCI & TECH
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Patent Information

Application Number
CN202421261588.1
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-06-04
Publication Date
2025-01-14
Estimated Expiration
2034-06-04

AI Technical Summary

Technical Problem

The existing detonator tube detonation control system and electronic system cannot monitor the system status in real time during the detonation process of the detonation of the pyrotechnic products, which poses safety hazards and cannot guarantee the stability of the pyrotechnic circuit, resulting in high uncertainty in detonation of the pyrotechnic products, affecting engineering safety. and operator safety.

Method used

A fireworks detonation control circuit is designed, including a detection circuit and an ignition circuit. The detection circuit is used to monitor the fireworks and operating system status in real time. Multiple on-off switches are set in the ignition circuit, and the current direction control circuit is used to control the current. and a NAND gate detection circuit and an external parallel neutralization circuit are provided to ensure the stability and safety of the energy storage circuit.

Benefits of technology

Through real-time monitoring and control, the reliability and safety of the detonation system are improved, the stability and safety of the detonation process of the pyrotechnic products are ensured, the operation risks are reduced, and the reliability and safety of the project are improved.

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Abstract

The utility model discloses a detonating control circuit of an initiating explosive device. The detonating control circuit comprises an ignition circuit, a current direction control circuit and a state monitoring circuit which are connected in sequence, the first control signal input end QBQK1 and the second control signal input end QBQK2 are connected with the input end of the ignition circuit, the output end of the ignition circuit is connected with the input end of the current direction control circuit, and the output end of the current direction control circuit is connected with the input end of the state monitoring circuit. The output end of the state monitoring circuit is connected with a monitoring signal input end TESTIN and a monitoring signal output end TESTOUT; the ignition circuit is used for realizing and controlling stable output of ignition signals, the current direction control circuit is used for controlling one-way output of current, and the monitoring circuit is used for monitoring states of the initiating explosive device and the whole operating system in real time. Compared with the prior art, dual functions of state monitoring and reliable detonation of the initiating explosive device are realized, and the operation safety of engineering application is ensured.
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Description

Technical Field

[0001] The utility model belongs to the field of detonation control, in particular to a detonation control circuit for explosive devices. Background Art

[0002] The industrial field requires the use of a large number of pyrotechnics (such as explosives and detonators) to complete major national needs such as mining, tunneling, special processing, scientific research and testing. Under normal conditions, pyrotechnics will not detonate, and an external detonation control system is required to complete the operation. At present, the detonation control systems used in China are mainly divided into two categories: detonating cord detonation control system.

[0003] The advantages of the detonating cord detonation control system are its simple structure and low environmental requirements. However, in actual operation, there are many factors that affect the normal detonation of pyrotechnics by the detonating cord detonation control system, such as the state of the pyrotechnics, whether the detonating cord detonation control system is normal, and whether the connection between the pyrotechnics and the detonating cord detonation control system is tight and reliable. However, the detonating cord detonation control system consists of detonating cords and detonation controllers, which can only transmit the detonation signal from the detonation controller to the pyrotechnics, and does not have the function of monitoring the working status of the entire system, which will pose a great threat to engineering safety and operators.

[0004] Electronic systems are an effective solution to the above problems. Traditional electronic systems can only realize the detonation function of pyrotechnics, but cannot monitor the status of pyrotechnics in real time. There are major safety hazards in the entire test process. Moreover, traditional electronic systems cannot identify and detect input signals in the circuit. There is a dangerous situation that pyrotechnics cannot be detonated normally after issuing commands. The energy storage circuit in the electronic system has extremely high requirements on the working stability of the ignition control circuit. The traditional electronic system has a simple structure and cannot guarantee that the ignition circuit can continuously and stably charge the pyrotechnics. Utility Model Content

[0005] In view of the above problems, the present invention discloses an ignition control circuit for pyrotechnics, wherein the ignition control circuit comprises a detection circuit and an ignition circuit, wherein the detection circuit can monitor the status of the pyrotechnics and the entire operating system in real time, thereby eliminating a large number of uncertain factors in the test process, ensuring the safety of test personnel and the smooth progress of the project, and a plurality of on-off switches are arranged in the ignition circuit, so that if an emergency occurs during the actual operation, the test personnel can control the status of the on-off switches, and the ignition circuit will not detonate the pyrotechnics, thereby greatly improving the working reliability of the electronic system.

[0006] The technical solution for achieving the purpose of the utility model is: a pyrotechnic detonation control circuit, the pyrotechnic detonation control circuit includes an ignition circuit, a current direction control circuit and a status monitoring circuit connected in sequence; a first control signal input terminal QB_QK1 and a second control signal input terminal QB_QK2 are connected to the input terminal of the ignition circuit, the output terminal of the ignition circuit is connected to the input terminal of the current direction control circuit, the output terminal of the current direction control circuit is connected to the input terminal of the status monitoring circuit, and the output terminal of the status monitoring circuit is connected to the monitoring signal input terminal TEST_IN and the monitoring signal output terminal TEST_OUT; the ignition circuit is used to realize and control the stable output of the ignition signal, the current direction control circuit is used to control the unidirectional output of the current, and the monitoring circuit is used to monitor the status of the pyrotechnic and the entire operating system in real time.

[0007] Compared with the existing technology, the utility model has the following significant advantages:

[0008] (1) The utility model is provided with a status monitoring circuit, which is used to monitor the status of the pyrotechnics and the entire operating system in real time, thereby improving the working reliability of the electronic system.

[0009] (2) The utility model is provided with a current direction control circuit to limit the direction of the signal control current and the monitoring current, thereby ensuring the safety of electronic components.

[0010] (3) The utility model is provided with a NAND gate detection circuit to detect the input ignition control signal. If the ignition control signal is abnormal, the 3.3V voltage will not be connected to the circuit, the three-way pipe Q6 will not be turned on, the internal circuit will be in a disconnected state, and the energy storage circuit will not be able to operate the pyrotechnics, thereby ensuring the safety of the test.

[0011] (4) The utility model is provided with an external parallel neutralization circuit of the transistor Q6, which controls the internal signal of the transistor circuit so as not to produce obvious oscillation, thereby achieving the stability of the MOS tube Q7, and then the energy storage circuit continuously and stably performs the energy storage process of the pyrotechnic product, ensuring the reliability of the ignition process. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the ignition control circuit of the pyrotechnic device in the utility model;

[0013] Figure 2 It is a schematic diagram of the ignition circuit in the utility model;

[0014] Figure 3 This is a schematic diagram of the state monitoring circuit in the utility model. DETAILED DESCRIPTION

[0015] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0016] like Figure 1 As shown, the utility model discloses a pyrotechnic detonation control circuit, comprising an ignition circuit, a current direction control circuit and a state monitoring circuit connected in sequence, a first control signal input terminal QB_QK1 and a second control signal input terminal QB_QK2 are connected to the input terminal of the ignition circuit, an output terminal of the ignition circuit is connected to the input terminal of the current direction control circuit, an output terminal of the current direction control circuit is connected to the input terminal of the state monitoring circuit, and an output terminal of the state monitoring circuit is connected to a monitoring signal input terminal TEST_IN and a monitoring signal output terminal TEST_OUT. The ignition circuit is used to realize and control the stable output of the ignition signal, the current direction control circuit is used to control the unidirectional output of the current, and the monitoring circuit is used to monitor the state of the pyrotechnic and the entire operating system in real time, which can eliminate a large number of uncertain factors in the test process, ensure the safety of the test personnel and the smooth progress of the project, and multiple on-off switches are set in the ignition circuit. If an emergency occurs during the actual operation, the test personnel can control the on-off switch state, and the ignition circuit will not detonate the pyrotechnic, which greatly improves the working reliability of the electronic system.

[0017] like Figure 2 As shown, the ignition circuit includes a NAND gate detection circuit, an ignition control circuit, and an energy storage circuit.

[0018] The NAND gate detection circuit includes: a load resistor R32, a load resistor R33, and a NAND gate U6. One end of the load resistor R32 is connected to the second control signal input terminal QB_QK2, and the other end is connected to the positive electrode of the power supply. One end of the load resistor R33 is connected to the first control signal input terminal QB_QK1, and the other end is connected to the positive electrode of the power supply; the NAND gate U6 is connected to the first control signal input terminal QB_QK1 and the second control signal input terminal QB_QK2. The NAND gate U6 can detect the input ignition control signal. If the ignition control signal is abnormal, the 3.3V voltage will not be connected to the circuit, the three-tube Q6 will not be turned on, the internal circuit is in a disconnected state, and the energy storage circuit cannot operate the pyrotechnics, thereby ensuring the safety of the test.

[0019] The ignition control circuit includes: a load resistor R86, a load resistor R87, a neutralization circuit, a load resistor R88, a load resistor R89, a load resistor R90, a load resistor R91, a load resistor R92, a transistor Q6, a MOS tube Q7 and a diode D3.

[0020] Among them, the neutralization circuit includes: a load resistor CZ2 and a capacitor C63; the load resistor CZ2 and the capacitor C63 are connected and connected in parallel with the transistor Q6, the load resistor R87 is connected in parallel with the neutralization circuit and grounded, one end of the load resistor R86 is connected to the NAND gate U6, and the other end is connected to the transistor Q6.

[0021] The load resistor R88 and the load resistor R89 ​​are connected in series, the load resistor R88 is connected to the three-way pipe Q6, the load resistor R89 ​​is set between the diode D3 and the load resistor R91, one end of the load resistor R90 is connected between the load resistor R88 and the load resistor R89, and the other end is connected to the MOS tube Q7. One end of the load resistor R92 is connected to the MOS tube Q7, and the other end is grounded. The anode of the diode D5 is set between the load resistor R92 and the MOS tube, and the cathode of the diode D5 is connected to the ignition signal output terminal QB_FIRE. The anode of the diode D3 is connected to the power supply, and one end of the load resistor R91 is connected to the cathode of the diode D3, and the other end is connected to the energy storage circuit.

[0022] Because there is junction capacitance between each electrode of the transistor, the junction capacitance is inside the transistor, between the base and the collector. Although the junction capacitance is very small, when the operating frequency of the transistor is high, it will cause part of the signal current to be output from the collector of the transistor, and flow back to the base through the junction capacitance inside the transistor, causing parasitic oscillation and affecting the working stability of the transistor. Therefore, a neutralization circuit is connected in parallel outside the transistor Q6 to control the internal signal of the transistor circuit so that it will not produce obvious oscillation, thereby achieving the stability of the MOS tube Q7, and then the energy storage circuit will continue to stably store the energy of the pyrotechnics, ensuring the reliability of the ignition process.

[0023] The energy storage circuit includes: capacitor C63, capacitor C65, dissipation resistor R93 and dissipation resistor R95 in parallel, the energy storage circuit is connected between the load resistor R91 and the MOS tube Q7; the energy storage circuit is grounded; the dissipation resistor R93 and the dissipation resistor R95 in the energy storage circuit can quickly consume the energy stored in the contents C65 and C66 after the overall circuit system is powered off, to prevent the occurrence of false triggering of pyrotechnics or burning of the ignition circuit due to the presence of energy in the energy storage circuit during the next test, thereby ensuring the safety of the test and electronic components.

[0024] The working principle of the ignition circuit is as follows: when the pyrotechnic product needs to be ignited, the first control signal input terminal QB_QK1 and the second control signal input terminal QB_QK2 send out an ignition control signal, and the NAND gate U6 receives the ignition control signal and determines whether the signal meets the circuit conduction condition. When the NAND gate U6 detects that the ignition control signal is normal, the 3.3V power supply is connected to the circuit through the load resistor R32 and the load resistor R33, and there is a voltage at the collector of the transistor Q6. The transistor Q6 is turned on and the circuit is turned on, and the G pole of the MOS tube Q7 is connected to the circuit, the MOS tube Q7 is turned on, and the energy storage of the ignition capacitor C65 and the capacitor C66 is transmitted to the pyrotechnic product through the MOS tube Q7 and the diode D5 and is quickly released on the pyrotechnic product to complete the ignition operation.

[0025] like Figure 1As shown, the current direction control circuit includes: a diode D2 and a diode D5; the anode of the diode D5 is arranged between the load resistor R92 and the MOS tube, and the cathode of the diode D5 is connected to the ignition signal output terminal QB_FIRE; the ignition control current can only flow out of the ignition circuit but cannot flow into the ignition circuit through the ignition signal input terminal QB_FIRE, thereby ensuring the safety of the electronic components inside the ignition circuit.

[0026] The cathode of diode D2 is connected to the ignition signal input terminal QB_FIRE, and the anode of diode D2 is connected between load resistor R83 and load resistor R82. The monitoring current can only flow out of the monitoring circuit and cannot flow into the monitoring circuit through the ignition signal input terminal QB_FIRE, thereby ensuring the safety of electronic components inside the monitoring circuit.

[0027] like Figure 3 As shown, the state monitoring circuit includes: a load resistor R82, a load resistor R83, a load resistor R85, a magnetic sensitive diode F2, a diode D10 and a transistor Q5.

[0028] The load resistor R83 is arranged between the diode D2 and the transistor Q5, one end of the load resistor R83 is connected to the anode of the diode D2, and the other end is connected to the base of the transistor Q5. The load resistor R82 is connected in series with the magnetic sensitive diode F2, one end of the load resistor R82 is arranged between the anode of the diode D2 and the load resistor R83, and the magnetic sensitive diode F2 is connected to the monitoring signal output terminal TEST_OUT. One end of the load resistor R85 is connected to the 3.3V power supply, and the other end is connected to the collector of the three-way tube Q5. The monitoring signal input terminal TEST_IN is arranged between the load resistor R85 and the transistor Q5, and the emitter of the three-way tube Q5 is forward connected to the diode D10, and the diode D10 is grounded.

[0029] The magnetic sensitive diode F2 is connected to the monitoring signal output terminal TEST_OUT. The magnetic sensitive diode F2 can test the current passing through the monitoring signal output terminal TEST_OUT. If the input current is too large, the magnetic sensitive diode F2 will melt and cause the circuit to be disconnected, which can protect the safety of electronic components inside the circuit.

[0030] During the monitoring test, if the pyrotechnics is normal, the base of transistor Q5 is at a low level, the monitoring signal input terminal TEST_IN is at a high level, and the monitoring signal output terminal TEST_OUT is at a low level. If the pyrotechnics is abnormal or the pyrotechnics is not connected, the base of transistor Q5 is at a high level, the monitoring signal input terminal TEST_IN is at a low level, and the monitoring signal output terminal TEST_OUT is at a high level. By monitoring the microprocessor, the signal input terminal TEST_IN is at a high level and the signal output terminal TEST_OUT is at a high level, and it can be determined whether the pyrotechnics is normal.

[0031] The above are only preferred embodiments of the utility model patent and are not used to limit the utility model patent. For technicians in this field, several improvements and replacements can be made to the utility model without departing from the design concept of the utility model. These improvements and replacements all fall within the protection scope of the utility model.

Claims

1. A pyrotechnic detonation control circuit, characterized in that: The detonation control circuit includes an ignition circuit, a current direction control circuit and a status monitoring circuit which are connected in sequence; a first control signal input terminal QB_QK1 and a second control signal input terminal QB_QK2 are connected to the input terminal of the ignition circuit, the output terminal of the ignition circuit is connected to the input terminal of the current direction control circuit, the output terminal of the current direction control circuit is connected to the input terminal of the status monitoring circuit, and the output terminal of the status monitoring circuit is connected to the monitoring signal input terminal TEST_IN and the monitoring signal output terminal TEST_OUT; the ignition circuit is used to realize and control the stable output of the ignition signal, the current direction control circuit is used to control the unidirectional output of the current, and the monitoring circuit is used to monitor the status of the pyrotechnics and the entire operating system in real time.

2. The pyrotechnic detonation control circuit according to claim 1, characterized in that: The ignition circuit includes a NAND gate detection circuit, an ignition control circuit, and an energy storage circuit; the input end of the NAND gate detection circuit is connected to the first control signal input end QB_QK1 and the second control signal input end QB_QK2, and is used to detect the ignition control signal; the output end of the NAND gate detection circuit is connected to the input end of the ignition control circuit, and the energy storage circuit is connected to the ignition control circuit, and is used to identify and detect the control signal in the circuit; the output end of the ignition control circuit is connected to the current direction control circuit, and is used to realize the detonation of the pyrotechnics.

3. The pyrotechnic detonation control circuit according to claim 2, characterized in that: The NAND gate detection circuit includes: a load resistor R32, a load resistor R33, and a NAND gate U6; one end of the load resistor R32 is connected to the second control signal input terminal QB_QK2, and the other end is connected to the positive electrode of the power supply; one end of the load resistor R33 is connected to the first control signal input terminal QB_QK1, and the other end is connected to the positive electrode of the power supply; the NAND gate U6 is connected to the first control signal input terminal QB_QK1 and the second control signal input terminal QB_QK2.

4. The pyrotechnic detonation control circuit according to claim 3, characterized in that: The ignition control circuit includes: a load resistor R86, a load resistor R87, a neutralization circuit, a load resistor R88, a load resistor R89, a load resistor R90, a load resistor R91, a load resistor R92, a transistor Q6, a MOS transistor Q7 and a diode D3; the neutralization circuit is connected in parallel with the transistor Q6, the load resistor R87 is connected in parallel with the neutralization circuit and is grounded, one end of the load resistor R86 is connected to a NAND gate U6, and the other end is connected to the transistor Q6; the load resistor R88 and the load resistor R89 ​​are connected in series, the load resistor R88 is connected to the transistor Q6, The load resistor R89 ​​is arranged between the diode D3 and the load resistor R91, one end of the load resistor R90 is connected between the load resistor R88 and the load resistor R89, and the other end is connected to the MOS tube Q7; one end of the load resistor R92 is connected to the MOS tube Q7, and the other end is grounded; the anode of the diode D5 is arranged between the load resistor R92 and the MOS tube, and the cathode of the diode D5 is connected to the ignition signal output terminal QB_FIRE; the anode of the diode D3 is connected to the power supply, one end of the load resistor R91 is connected to the cathode of the diode D3, and the other end is connected to the energy storage circuit.

5. The pyrotechnic detonation control circuit according to claim 3, characterized in that: The energy storage circuit includes a capacitor C63, a capacitor C65, a dissipation resistor R93 and a dissipation resistor R95 connected in parallel; the energy storage circuit is connected between the load resistor R91 and the MOS tube Q7 and is grounded.

6. The pyrotechnic detonation control circuit according to claim 1, characterized in that: The current direction control circuit includes: a diode D2 and a diode D5; the anode of the diode D5 is connected, and the cathode of the diode D5 is connected to the output end of the ignition circuit; the cathode of the diode D2 is connected to the ignition signal input end QB_FIRE, and the anode of the diode D2 is connected to the input end of the state monitoring circuit.

7. The pyrotechnic detonation control circuit according to claim 1, characterized in that: The state monitoring circuit includes: a load resistor R82, a load resistor R83, a load resistor R85, a magnetic sensitive diode F2, a diode D10 and a transistor Q5; one end of the load resistor R83 is arranged between the output end of the current direction control circuit and the transistor Q5, and the other end is connected to the base of the transistor Q5; the load resistor R82 and the magnetic sensitive diode F2 are connected in series, one end of the load resistor R82 is arranged between the output end of the current direction control circuit and the load resistor R83, and the magnetic sensitive diode F2 is connected to the monitoring signal output end TEST_OUT; one end of the load resistor R85 is connected to the power supply, and the other end is connected to the collector of the three-way tube Q5, a monitoring signal input end TEST_IN is arranged between the load resistor R85 and the transistor Q5, the emitter of the three-way tube Q5 is forward connected to the diode D10, and the diode D10 is grounded; the magnetic sensitive diode F2 is connected to the monitoring signal output end TEST_OUT.

8. The pyrotechnic detonation control circuit according to claim 4, characterized in that: The neutralization circuit includes a load resistor CZ2 and a capacitor C63; the load resistor CZ2 and the capacitor C63 are connected in parallel with the transistor Q6, and the load resistor R87 is connected in parallel with the neutralization circuit and grounded.