Capacitor charging and discharging ignition system

Abstract

The invention relates to an ignition system, in particular to a capacitor charging and discharging ignition system which comprises a control box, a capacitor box, a control room and a test room, the control box is arranged in the control room, a power input interface is arranged on the control box, and a charging and power supply, a relay matrix controller and a capacitor charging and discharging control module which are connected in sequence are arranged in the control box; the charging and power supply is connected with the power input interface; the capacitance box is arranged in the test room, an explosion-proof device is further arranged in the test room, and the initiating explosive device is arranged in the test room through the explosion-proof device; and a manual switching capacitor module connected in parallel with the capacitor charging and discharging control module and the initiating explosive device is arranged in the capacitor box. The corresponding ignition capacitors can be switched according to use requirements, the universality of the ignition system is improved, and the application range of the ignition system is widened.

Description

Technical Field

[0001] The invention relates to an ignition system, in particular to a capacitor charging and discharging ignition system. Background Art

[0002] Explosives, as a transient device that can release energy quickly, play an indispensable role in aerospace, industry and many other high-tech fields with their high precision, high reliability and strong energy release ability. From rocket separation and attitude adjustment in aerospace to blasting operations and emergency shut-off systems in the industrial field, the application of explosives is everywhere, and the stability and reliability of their performance are directly related to the success and safety of the entire system.

[0003] However, with the rapid development of science and technology, the types of pyrotechnics are becoming more and more diverse. From traditional gunpowder fuses to modern high-energy igniters and electric detonators, different types of pyrotechnics have significant differences in structure, working principle and ignition conditions. This has brought great challenges to the testing of pyrotechnics. Traditional testing methods often use single or limited ignition equipment, which is difficult to adapt to the testing needs of diversified pyrotechnics. Not only is it inefficient, but it may also lead to distortion of pyrotechnic performance evaluation due to improper testing, and even cause safety hazards.

[0004] Therefore, in response to the current difficulties faced in the field of pyrotechnic testing, it is urgent to develop an ignition test system for pyrotechnics with strong versatility and wide adaptability. Summary of the invention

[0005] The purpose of the present invention is to solve the technical problems of poor versatility and narrow application range of the existing ignition system, and to provide a capacitor charging and discharging ignition system.

[0006] To solve the above technical problems, the technical solutions provided by the present invention are as follows: A capacitor charging and discharging ignition system comprises a control box, a capacitor box, and a control room and a test room separated by an isolation door; The control box is placed in the control room, and a power input interface is provided on the control box. A charging and power supply, a relay matrix controller and a capacitor charge and discharge control module connected in sequence are provided in the control box; the charging and power supply are connected to the power input interface; The capacitor box is placed in a test room, which is also equipped with an explosion-proof device, and the pyrotechnics are placed in the test room through the explosion-proof device; The capacitor box is provided with a manual switching capacitor module which is connected in parallel with the capacitor charging and discharging control module and the pyrotechnic product.

[0007] Further, the capacitor charge and discharge control module includes a charging circuit and a discharging circuit connected in parallel at both ends of the manual switching capacitor module; The initiator is connected in series in the discharge circuit, and the discharge circuit and the charging circuit are both connected to the relay matrix controller.

[0008] Furthermore, the charging circuit comprises a charging relay, an anti-reverse connection diode and a charging current limiting resistor which are connected in series in sequence; The armature of the charging relay is connected to the charging and power supply, and the contact of the charging relay is connected to the anti-reverse connection diode; The coil control end of the charging relay is connected to the relay matrix controller, and the coil power supply end of the charging relay is connected to the charging and power supply; The charging power interface and the charging current limiting resistor are respectively connected to the two ends of the manual switching capacitor module.

[0009] Further, the discharge circuit includes a P-MOS tube, the drain of the P-MOS tube is connected to the manual switching capacitor module, the source of the P-MOS tube is connected to one end of the pyrotechnic device, and the other end of the pyrotechnic device is connected to the manual switching capacitor module; The gate of the P-MOS tube is connected to the relay matrix controller through an ignition trigger signal generating module.

[0010] Further, the ignition trigger signal generating module includes an isolated level matching module; The first pin and the fourth pin of the isolated level matching module are respectively connected to one end of the resistor R28 and the resistor R31, and the other ends of the resistor R28 and the resistor R31 are both connected to the charging and power supply; The second pin of the isolation level matching module is connected to the first pin of the transistor Q4, the second pin of the transistor Q4 is connected to the relay matrix controller, and the third pin of the transistor Q4 is grounded; The third pin of the isolated level matching module is connected to the gate of the P-MOS tube.

[0011] Furthermore, the manual switching capacitor module includes a multi-position capacitor selection switch and an ignition capacitor group connected in series therewith; The knob of the multi-position capacitor selection switch is connected to the charging current limiting resistor and the drain of the P-MOS tube; The ignition capacitor group includes multiple ignition capacitors with the same number of gears as the multi-gear capacitor selection switch, and the capacitance values ​​of the multiple ignition capacitors are different. One end of the multiple ignition capacitors is connected to the multiple contacts of the multi-gear capacitor selection switch in a one-to-one correspondence, and the other ends of the multiple ignition capacitors are connected to the charging and power supply and pyrotechnics.

[0012] Furthermore, it also includes a primary safety interlocking unit, which includes a door machine switch arranged on the door frame of the isolation door, and a primary line safety switch connected in series in the discharge circuit, wherein two contacts of the primary line safety switch are respectively connected to the source of the P-MOS tube and one end of the pyrotechnic device; The relay matrix controller is connected to the coils of relay K1, relay K2 and relay K3; One end of the door switch is connected to the ground, the armature of the relay K3, one end of the indicator LED1 and the charging and power supply, and the other end of the door switch is connected to one end of the indicator LED2; The other end of the indicator light LED1 is connected to the contact of the relay K1, and the armature of the relay K1 is grounded; The other end of the indicator light LED2 is connected to the contact of the relay K2, and the armature of the relay K2 is grounded; The contact of the relay K3 is connected to the control end of the primary line safety switch, and the grounding end of the primary line safety switch is grounded.

[0013] Furthermore, it also includes a secondary safety interlocking unit, which includes a secondary line safety switch; The two first pins of the secondary line safety switch are connected; The two second pins of the secondary line safety switch are respectively connected to the source of the P-MOS tube and the ignition capacitor; The two third pins of the secondary line safety switch are respectively connected to the two ends of the explosive device; The fifth pin and the sixth pin of the secondary line safety switch are connected to the charging and power supply and the relay matrix controller respectively.

[0014] Furthermore, a capacitor charging voltage monitoring module for monitoring the voltage across the ignition capacitor is connected in parallel to both ends of the manual switching capacitor module.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The capacitor charging and discharging ignition system provided by the present invention accumulates electric energy during the charging process by manually switching the ignition capacitor in the capacitor module, and controls the discharge of the ignition capacitor through the capacitor charging and discharging control module when ignition is required. The high current generated during discharge can ignite the pyrotechnics. Compared with the traditional fuze system, the capacitor charging and discharging has significant advantages such as fast response speed, adjustable energy and high safety. Moreover, by setting a manually switching capacitor module, the corresponding ignition capacitor can be switched according to the use requirements, which improves the versatility of the ignition system and increases the scope of application of the ignition system.

[0016] 2. The capacitor charge and discharge ignition system provided by the present invention is equipped with a primary safety interlock unit and a secondary safety interlock unit. The primary safety interlock unit is connected in series with the discharge circuit in the capacitor charge and discharge control module, and cooperates with the door machine switch to achieve the function of preventing the pyrotechnics from being ignited when the isolation door is opened, thereby ensuring the safety of operators entering the test room; the secondary safety interlock unit can electrically isolate the pyrotechnics from the ignition capacitor to avoid accidental explosion of the pyrotechnics when the pyrotechnics are subject to interference voltage. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of an embodiment of the present invention; Figure 2 It is a structural schematic diagram of a capacitor charging and discharging control module in an embodiment of the present invention; Figure 3 Schematic diagram of the structure of the ignition trigger signal generating module in an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of a manually switched capacitor module according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of a primary safety interlocking unit in an embodiment of the present invention; Figure 6 Schematic diagram of the structure of the secondary safety interlocking unit in an embodiment of the present invention. DETAILED DESCRIPTION

[0018] The technical solutions in the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] like Figure 1 As shown, a capacitor charging and discharging ignition system includes a control box, a capacitor box, and a control room and a test room separated by an isolation door; The control box is placed in the control room. The control box is provided with a power input interface. The control box is provided with a charging and power supply, a relay matrix controller and a capacitor charging and discharging control module which are connected in sequence. The charging and power supply is connected to the power input interface. The capacitor box is placed in the test room, and an explosion-proof device is also provided in the test room. In this embodiment, the explosion-proof device is an explosion-proof barrel, which is used to absorb the shock wave generated by the explosion of the pyrotechnics; the pyrotechnics are placed in the test room through the explosion-proof barrel; the capacitor box is provided with a manual switching capacitor module connected in parallel with the capacitor charging and discharging control module and the pyrotechnics.

[0020] like Figure 2As shown, the capacitor charge and discharge control module includes a charging circuit and a discharging circuit connected in parallel at both ends of the manual switching capacitor module; the pyrotechnics are connected in series in the discharging circuit, and the discharging circuit and the charging circuit are connected to the relay matrix controller. The control box is provided with a charging trigger switch and a discharging trigger switch, and the charging trigger switch and the discharging trigger switch are connected to the relay matrix controller. The relay matrix controller controls the operation of the charging circuit and the discharging circuit by turning on or off the charging trigger switch and the discharging trigger switch.

[0021] like Figure 2 As shown, the charging circuit includes a charging relay, an anti-reverse connection diode and a charging current limiting resistor connected in series in sequence; the armature of the charging relay is connected to the charging and power supply, and the contact of the charging relay is connected to the anti-reverse connection diode; the coil control end of the charging relay is connected to the relay matrix controller, and the coil power supply end of the charging relay is connected to the charging and power supply; the charging power supply interface and the charging current limiting resistor are respectively connected to the two ends of the manual switching capacitor module.

[0022] When charging, close the charging trigger switch on the control box. The relay matrix controller controls the charging relay to close according to the closing state of the charging trigger switch. The ignition capacitor corresponding to the voltage required for ignition of the pyrotechnics is charged through the charging and power supply. After charging is completed, the charging relay is disconnected.

[0023] like Figure 2 As shown, the discharge circuit includes a P-MOS tube, the drain of the P-MOS tube is connected to the manual switching capacitor module, the source of the P-MOS tube is connected to one end of the pyrotechnic product, and the other end of the pyrotechnic product is connected to the manual switching capacitor module; the gate of the P-MOS tube is connected to the relay matrix controller through the ignition trigger signal generation module.

[0024] During discharge, an ignition signal is generated by the ignition trigger signal generation module, and the ignition signal controls the drain and source of the P-MOS tube to be turned on, thereby realizing the discharge of the corresponding ignition capacitor and further realizing the ignition of the pyrotechnic product.

[0025] like Figure 3 As shown, in order to generate an ignition signal to control the source and drain of the P-MOS tube to be turned on and realize the discharge of the ignition capacitor; the ignition trigger signal generation module includes an isolated level matching module; the isolated level matching module is a Darlington tube; The first pin and the fourth pin of the Darlington tube are connected to one end of the resistor R28 and the resistor R31 respectively, and the other ends of the resistor R28 and the resistor R31 are connected to the charging and power supply; the second pin of the Darlington tube is connected to the first pin of the transistor Q4, the second pin of the transistor Q4 is connected to the relay matrix controller, and the third pin of the transistor Q4 is grounded; the third pin of the Darlington tube is connected to the gate of the P-MOS tube.

[0026] During use, the relay matrix controller controls the Darlington transistor to output an ignition signal at the third pin of the Darlington transistor, and the ignition signal is input from the gate of the P-MOS tube to the P-MOS tube.

[0027] like Figure 4 As shown, in order to make the ignition system suitable for ignition of different explosives and to switch the corresponding ignition capacitor according to the use requirements, the manual switching capacitor module includes a multi-position capacitor selection switch and an ignition capacitor group connected in series with the multi-position capacitor selection switch; the knob of the multi-position capacitor selection switch is connected to the charging current limiting resistor and the drain of the P-MOS tube; The ignition capacitor group includes multiple ignition capacitors with the same number of gears as the multi-gear capacitor selection switch. The capacitance values ​​of the multiple ignition capacitors are different. One end of the multiple ignition capacitors is connected one-to-one with multiple contacts of the multi-gear capacitor selection switch, and the other ends of the multiple ignition capacitors are connected to the charging and power supply and pyrotechnics.

[0028] In this embodiment, the ignition capacitor group includes ignition capacitors of specifications of 4.7μF, 6.8μF, 10μF, 15μF, 22μF, 28μF, 33μF, 68μF, 200μF, 220μF and 470μF, and the withstand voltage of the ignition capacitor is required to be no less than 63V, and the capacitance accuracy is no less than 10%. The ignition capacitor is a CA30 tantalum capacitor. In actual application, the ignition capacitor corresponding to the pyrotechnic product can be selected according to demand through a multi-position capacitor selection switch.

[0029] like Figure 1 and Figure 5 As shown, in order to realize the function that the pyrotechnics cannot be ignited when the isolation door is opened, so as to ensure the safety of the operator entering the test room; the ignition system also includes a primary safety interlocking unit, which includes a door machine switch arranged on the door frame of the isolation door, and a primary line safety switch connected in series in the discharge circuit, and the two contacts of the primary line safety switch are respectively connected to the source of the P-MOS tube and one end of the pyrotechnics; The relay matrix controller is connected to the coils of relay K1, relay K2 and relay K3; The door machine switch is a proximity switch, one end of the proximity switch is connected to the ground, the armature of the relay K3, one end of the indicator LED1 and the charging and power supply, and the other end of the proximity switch is connected to one end of the indicator LED2; The other end of the indicator LED1 is connected to the contact of the relay K1, and the armature of the relay K1 is grounded; The other end of the indicator LED2 is connected to the contact of the relay K2, and the armature of the relay K2 is grounded; The contact of the relay K3 is connected to the control terminal of the primary line safety switch, and the ground terminal of the primary line safety switch is grounded.

[0030] When the isolation door is closed, the proximity switch is closed, and the relay matrix controller receives a voltage signal to control relay K1 to close, relay K2 to disconnect, and relay K3 to close. At this time, indicator light LED2 is on, indicator light LED1 is off, and the line safety switch is closed. The pyrotechnics can be detonated by closing the ignition switch.

[0031] When the isolation door is opened, the proximity switch is disconnected, and the relay matrix controller receives a 0 VDC voltage signal, controlling relay K1 to disconnect, relay K2 to close, and relay K3 to disconnect. At this time, indicator LED2 is off, indicator LED1 is on, and the line safety switch is disconnected, indicating that the operating room is safe and can be entered for manual operation.

[0032] like Figure 6 As shown, in order to electrically isolate the pyrotechnics from the ignition capacitor to prevent the pyrotechnics from accidentally exploding when the pyrotechnics are subjected to interference voltage; the ignition system also includes a secondary safety interlocking unit, which includes a secondary line safety switch; The two first pins of the secondary line safety switch are connected; The two second pins of the secondary circuit safety switch are respectively connected to the source of the P-MOS tube and the ignition capacitor; The two third pins of the secondary line safety switch are respectively connected to the two ends of the pyrotechnic device; The fifth pin and the sixth pin of the secondary line safety switch are connected to the charging and power supply and the relay matrix controller respectively.

[0033] like Figure 1 As shown, a capacitor charging voltage monitoring module for monitoring the voltage across the ignition capacitor is connected in parallel to both ends of the manual switching capacitor module.

[0034] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A capacitor charging and discharging ignition system, characterized in that: It includes a control box, a capacitor box, and a control room and a test room separated by an isolation door; The control box is placed in the control room, and a power input interface is provided on the control box. A charging and power supply, a relay matrix controller and a capacitor charge and discharge control module connected in sequence are provided in the control box; the charging and power supply are connected to the power input interface; The capacitor box is placed in a test room, which is also equipped with an explosion-proof device, and the pyrotechnics are placed in the test room through the explosion-proof device; The capacitor box is provided with a manual switching capacitor module which is connected in parallel with the capacitor charging and discharging control module and the pyrotechnic product.

2. The capacitor charge-discharge ignition system according to claim 1, characterized in that: The capacitor charge and discharge control module includes a charging circuit and a discharging circuit connected in parallel at both ends of the manual switching capacitor module; The initiator is connected in series in the discharge circuit, and the discharge circuit and the charging circuit are both connected to the relay matrix controller.

3. The capacitor charge-discharge ignition system according to claim 2, characterized in that: The charging circuit comprises a charging relay, an anti-reverse connection diode and a charging current limiting resistor which are connected in series in sequence; The armature of the charging relay is connected to the charging and power supply, and the contact of the charging relay is connected to the anti-reverse connection diode; The coil control end of the charging relay is connected to the relay matrix controller, and the coil power supply end of the charging relay is connected to the charging and power supply; The charging power interface and the charging current limiting resistor are respectively connected to the two ends of the manual switching capacitor module.

4. The capacitor charge-discharge ignition system according to claim 2, characterized in that: The discharge circuit includes a P-MOS tube, the drain of the P-MOS tube is connected to the manual switching capacitor module, the source of the P-MOS tube is connected to one end of the pyrotechnic device, and the other end of the pyrotechnic device is connected to the manual switching capacitor module; The gate of the P-MOS tube is connected to the relay matrix controller through an ignition trigger signal generating module.

5. The capacitor charge-discharge ignition system according to claim 4, characterized in that: The ignition trigger signal generating module includes an isolated level matching module; The first pin and the fourth pin of the isolated level matching module are respectively connected to one end of the resistor R28 and the resistor R31, and the other ends of the resistor R28 and the resistor R31 are both connected to the charging and power supply; The second pin of the isolation level matching module is connected to the first pin of the transistor Q4, the second pin of the transistor Q4 is connected to the relay matrix controller, and the third pin of the transistor Q4 is grounded; The third pin of the isolated level matching module is connected to the gate of the P-MOS tube.

6. The capacitor charge-discharge ignition system according to claim 5, characterized in that: The manual switching capacitor module includes a multi-position capacitor selection switch and an ignition capacitor group connected in series with the switch; The knob of the multi-position capacitor selection switch is connected to the charging current limiting resistor and the drain of the P-MOS tube; The ignition capacitor group includes multiple ignition capacitors with the same number of gears as the multi-gear capacitor selection switch, and the capacitance values ​​of the multiple ignition capacitors are different. One end of the multiple ignition capacitors is connected to the multiple contacts of the multi-gear capacitor selection switch in a one-to-one correspondence, and the other ends of the multiple ignition capacitors are connected to the charging and power supply and pyrotechnics.

7. The capacitor charge-discharge ignition system according to claim 4, characterized in that: It also includes a primary safety interlocking unit, which includes a door machine switch arranged on the door frame of the isolation door, and a primary line safety switch connected in series in the discharge circuit, wherein two contacts of the primary line safety switch are respectively connected to the source of the P-MOS tube and one end of the pyrotechnics; The relay matrix controller is connected to the coils of relay K1, relay K2 and relay K3; One end of the door switch is connected to the ground, the armature of the relay K3, one end of the indicator LED1 and the charging and power supply, and the other end of the door switch is connected to one end of the indicator LED2; The other end of the indicator light LED1 is connected to the contact of the relay K1, and the armature of the relay K1 is grounded; The other end of the indicator light LED2 is connected to the contact of the relay K2, and the armature of the relay K2 is grounded; The contact of the relay K3 is connected to the control end of the primary line safety switch, and the grounding end of the primary line safety switch is grounded.

8. The capacitor charge-discharge ignition system according to claim 4, characterized in that: It also includes a secondary safety interlocking unit, which includes a secondary line safety switch; The two first pins of the secondary line safety switch are connected; The two second pins of the secondary line safety switch are respectively connected to the source of the P-MOS tube and the ignition capacitor; The two third pins of the secondary line safety switch are respectively connected to the two ends of the explosive device; The fifth pin and the sixth pin of the secondary line safety switch are connected to the charging and power supply and the relay matrix controller respectively.

9. The capacitor charge-discharge ignition system according to claim 6, characterized in that: A capacitor charging voltage monitoring module for monitoring the voltage across the ignition capacitor is connected in parallel to both ends of the manual switching capacitor module.

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