A pyrotechnic ignition timing system

Abstract

The present invention relates to an ignition timing system, and specifically to an ignition timing system for explosives; comprising a control room and a test room separated by an isolation door; an industrial computer unit is provided in the control room, as well as an ignition energy generation unit, a resistance measurement unit, and an on-off signal detection unit connected thereto through an isolation type serial port communication card, and the ignition energy generation unit and the on-off signal detection unit are also connected to the industrial computer unit through a multi-channel high-speed signal acquisition card; an explosion-proof device is provided in the test room, and explosives are placed in the explosion-proof device; the explosives are connected to the ignition energy control unit, and a plurality of test points are provided on the explosives, and on-off targets are provided on the test points; and the plurality of on-off targets are all connected to the on-off signal detection unit. The present invention can realize the measurement of the action time between multiple points of the explosives, and is helpful to detect the uniformity of the quality of the explosives.

Description

Technical Field

[0001] The invention relates to an ignition timing system, in particular to an ignition timing system for explosives. Background Art

[0002] As a transient device, pyrotechnics are widely used in military, aerospace, industry and other fields. The main content of measuring the output performance of pyrotechnics and evaluating their main and important performance parameters lies in the accuracy and stability of their action time. The action time specifically refers to the time from the moment the pyrotechnic is powered on to its post-action state, as well as the time interval between multiple explosion points.

[0003] With the continuous development of science and technology, the types of pyrotechnics are increasing day by day, which puts higher requirements on the accuracy and stability of the action time of pyrotechnics. In order to meet this demand and ensure that pyrotechnics can play a stable performance in various application scenarios, it is very important to test pyrotechnics.

[0004] Therefore, there is an urgent need to develop an ignition timing system for pyrotechnics to effectively solve the problem of pyrotechnic action time testing and ensure the uniformity and accuracy of its action time. Summary of the invention

[0005] The purpose of the present invention is to solve the technical problems that the existing testing devices need to use different ignition equipment to perform ignition tests on pyrotechnics and it is difficult to achieve multi-point testing of pyrotechnics, and to provide an ignition timing system for pyrotechnics.

[0006] To solve the above technical problems, the technical solutions provided by the present invention are as follows:

[0007] An ignition timing system for explosives, comprising a control room and a test room separated by an isolation door;

[0008] The control room is provided with an industrial computer unit, and an ignition energy generation unit, a resistance measurement unit, and an on-off signal detection unit connected thereto via an isolated serial port communication card, and the ignition energy generation unit and the on-off signal detection unit are also connected to the industrial computer unit via a multi-channel high-speed signal acquisition card;

[0009] The test room is equipped with an explosion-proof device, and the explosive device is placed in the explosion-proof device;

[0010] The pyrotechnic device is connected to the ignition energy control unit, and a plurality of test points are arranged on the pyrotechnic device, and on-off targets are arranged on the test points; and the plurality of on-off targets are all connected to the on-off signal detection unit.

[0011] Further, the ignition energy generation unit includes an ignition capacitor and an ignition trigger signal generation module, and a capacitor charging and discharging module connected in parallel at both ends of the ignition capacitor;

[0012] The pyrotechnic device is connected in series in the discharge circuit of the capacitor charge and discharge module;

[0013] The ignition trigger signal generation module is connected to the discharge circuit of the capacitor charge and discharge module, and is connected to the industrial computer unit through a multi-channel high-speed signal acquisition card;

[0014] The capacitor charging and discharging module is connected to the industrial computer unit via an isolated serial communication card.

[0015] Further, the capacitor charging and discharging module includes a charging circuit and a discharging circuit connected in parallel at both ends of the ignition capacitor;

[0016] The charging circuit comprises an AC / DC power supply, a charging switch, an anti-reverse connection diode and a charging current limiting resistor which are connected in series in sequence; the AC / DC power supply and the charging current limiting resistor are respectively connected to the two ends of the ignition capacitor;

[0017] The discharge circuit includes a P-MOS tube, the drain of the P-MOS tube is connected to the ignition capacitor, 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 ignition capacitor; the gate of the P-MOS tube is connected to the ignition trigger signal generation module.

[0018] Furthermore, the ignition trigger signal generating module includes an MCU single chip computer, an ignition signal generating module and a trigger signal generating module;

[0019] The MCU single chip is connected to the isolated serial port communication card via a communication serial port;

[0020] The ignition signal generating module comprises a Darlington transistor, wherein the first pin and the fourth pin of the Darlington transistor are respectively connected to one end of a resistor R28 and a resistor R31, the other end of the resistor R28 is connected to an AC / DC power supply, and the other end of the resistor R31 is connected to an AC / DC power supply;

[0021] The second pin of the Darlington transistor is connected to the first pin of the triode Q4, the second pin of the triode Q4 is connected to the MCU single chip computer, and the third pin of the triode Q4 is grounded;

[0022] The third pin of the Darlington transistor is connected to the gate of the P-MOS tube;

[0023] The trigger signal generating module comprises two resistors R1 with the same resistance value. The two resistors R1 are connected in series and in parallel to two ends of the pyrotechnics. A trigger signal output terminal is arranged between the two resistors R1 and the trigger signal output terminal is connected to the on-off signal detecting unit.

[0024] Further, the resistance measuring unit includes a digital multimeter and a product resistance measurement switching module;

[0025] The digital multimeter is connected to the isolated serial communication card and the product resistance measurement switching module; the product resistance measurement switching module is connected to the isolated serial communication card;

[0026] The product resistance measurement switching module includes a double-pole double-throw switch, and two COM pins of the double-pole double-throw switch are respectively connected to the two ends of the pyrotechnic device;

[0027] The two NC pins of the double-pole double-throw switch are connected;

[0028] The two NO pins of the double-pole double-throw switch are respectively connected to the connection terminals of the digital multimeter.

[0029] Furthermore, the on-off signal detection unit includes an on-off time and status display module and a multi-channel on-off signal conditioning module;

[0030] The multi-channel on-off signal conditioning module includes a connected signal isolation module and a level matching module, and the multiple on-off targets are all connected to the signal isolation module;

[0031] The on-off time and status display module includes a time acquisition module and a status display module;

[0032] The time acquisition module includes a latch and a counter provided on the MCU single chip; the latch and the counter are connected to the level matching module, and the counter is connected to the communication serial port and the trigger signal output terminal;

[0033] The state display module includes an LED1 driving circuit and an LED2 driving circuit connected in series between a latch and an AC / DC power supply;

[0034] An indicator light LED1 is provided between the LED1 driving circuit and the AC / DC power supply;

[0035] An inverter is provided between the LED2 driving circuit and the latch, and an indicator light LED2 is provided between the LED2 driving circuit and the AC / DC direct current power supply.

[0036] Furthermore, it also includes a safety interlocking unit, which includes a proximity switch arranged on the door frame of the isolation door, and a line safety switch connected in series in the discharge circuit, wherein two contacts of the line safety switch are respectively connected to the source of the P-MOS tube and one end of the pyrotechnic device;

[0037] The MCU single chip is connected to the coils of relay K1, relay K2 and relay K3;

[0038] One end of the proximity switch is connected to the ground, the armature of the relay K3, one end of the indicator LED4 and the AC / DC power supply, and the other end of the proximity switch is connected to one end of the indicator LED3;

[0039] The other end of the indicator light LED3 is connected to the contact of the relay K1, and the armature of the relay K1 is grounded;

[0040] The other end of the indicator light LED4 is connected to the contact of the relay K2, and the armature of the relay K2 is grounded;

[0041] The contact of the relay K3 is connected to the control end of the line safety switch, and the ground end of the line safety switch is grounded.

[0042] Furthermore, the on-off target includes a probe, which is a twisted pair formed by two enameled wires twisted together;

[0043] One of the enameled wires is connected to the cathode of the first TVS diode, the other enameled wire is connected to the anode of the first TVS diode, and the anode of the first TVS diode is grounded;

[0044] The cathode of the first TVS diode is connected to the signal isolation module and one end of the resistor R2, and the other end of the resistor R2 is connected to the cathode of the diode and the cathode of the second TVS diode; the anode of the second TVS diode is grounded, and the anode of the diode is connected to the AC / DC power supply.

[0045] Compared with the prior art, the present invention has the following beneficial effects:

[0046] 1. The ignition timing system for pyrotechnics provided by the present invention ignites the pyrotechnics through an ignition energy generating unit, and sets a plurality of test points on the pyrotechnics. Each test point uses an on-off target pair to test the on-off signal, and then uses an on-off signal detection unit to measure the action time between multiple points of the pyrotechnics, which is helpful to detect the uniformity of the pyrotechnic quality.

[0047] 2. The ignition timing system for explosives provided by the present invention uses a capacitor as an energy storage element, charges it through an AC / DC power supply, and uses a discharge switch to complete the ignition of the explosives under test. At the same time, an MCU single-chip microcomputer is used to detect multi-channel on-off signals and the signal action time detection between each channel, and a multi-channel high-speed acquisition card is used to complete the acquisition of on-off signals, thereby realizing multi-channel testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0049] Figure 2 It is a structural schematic diagram of an ignition energy generating unit in an embodiment of the present invention;

[0050] Figure 3 This is a schematic diagram of the structure of an ignition signal generating module in an embodiment of the present invention;

[0051] Figure 4 This is a schematic diagram of the structure of a product resistance measurement switching module in an embodiment of the present invention;

[0052] Figure 5 Schematic diagram of the structure of the on-off signal detection unit in an embodiment of the present invention;

[0053] Figure 6 This is a schematic diagram of the structure of a safety interlocking unit in an embodiment of the present invention;

[0054] Figure 7 Schematic diagram of the structure of the on-off target in an embodiment of the present invention. DETAILED DESCRIPTION

[0055] 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.

[0056] like Figure 1 As shown, a pyrotechnic ignition timing system includes a control room and a test room separated by an isolation door; the control room is provided with an industrial computer unit, and an ignition energy generation unit, a resistance measurement unit, and an on-off signal detection unit connected to the control room through an isolated serial port communication card, and the ignition energy generation unit and the on-off signal detection unit are also connected to the industrial computer unit through a multi-channel high-speed signal acquisition card. An explosion-proof device is provided in the test room, and the pyrotechnic is placed in the explosion-proof device; the explosion-proof device is an explosion-proof barrel, which is used to absorb the shock wave generated by the explosion of the pyrotechnic. The pyrotechnic is connected to the ignition energy control unit, and a plurality of test points are provided on the pyrotechnic, and the test points are provided with on-off targets; the plurality of on-off targets are all connected to the on-off signal detection unit.

[0057] like Figure 1 and Figure 2 As shown, the ignition energy generation unit includes an ignition capacitor and an ignition trigger signal generation module, and a capacitor charging and discharging module connected in parallel at both ends of the ignition capacitor;

[0058] The explosive device is connected in series in the discharge circuit of the capacitor charge and discharge module;

[0059] The ignition trigger signal generating module is connected to the discharge circuit of the capacitor charging and discharging module, and is connected to the industrial computer unit through a multi-channel high-speed signal acquisition card; the capacitor charging and discharging module is connected to the industrial computer unit through an isolated serial port communication card.

[0060] like Figure 2 As shown, the capacitor charging and discharging module includes a charging circuit and a discharging circuit connected in parallel at both ends of the ignition capacitor;

[0061] The charging circuit includes an AC / DC power supply, a charging switch, an anti-reverse connection diode and a charging current limiting resistor connected in series in sequence; the AC / DC power supply and the charging current limiting resistor are respectively connected to the two ends of the ignition capacitor; when charging, the charging switch is closed (at the same time, the discharge switch is disconnected), and the ignition capacitor is charged through the AC / DC power supply, and the charging switch is disconnected after charging is completed.

[0062] The discharge circuit includes a P-MOS tube, the drain of the P-MOS tube is connected to the ignition capacitor, the source of the P-MOS tube is connected to one end of the pyrotechnics, and the other end of the pyrotechnics is connected to the ignition capacitor; the gate of the P-MOS tube is connected to the ignition trigger signal generation module. During discharge, the ignition trigger signal generation module generates an ignition signal, and the ignition signal controls the drain and source of the P-MOS tube to conduct, thereby realizing the discharge of the corresponding ignition capacitor and further realizing the ignition of the pyrotechnics.

[0063] The ignition trigger signal generation module includes an MCU single chip computer, an ignition signal generation module and a trigger signal generation module;

[0064] The MCU microcontroller is connected to the isolated serial communication card through the communication serial port;

[0065] 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, the discharge of the ignition capacitor is realized; the ignition signal generation module includes a Darlington transistor, the first pin and the fourth pin of the Darlington transistor are respectively connected to one end of the resistor R28 and the resistor R31, the other end of the resistor R28 is connected to the AC / DC direct current power supply, and the other end of the resistor R31 is connected to the AC / DC direct current power supply; the second pin of the Darlington transistor is connected to the first pin of the transistor Q4, the second pin of the transistor Q4 is connected to the MCU microcontroller, and the third pin of the transistor Q4 is grounded; the third pin of the Darlington transistor is connected to the gate of the P-MOS tube;

[0066] During use, the MCU single chip 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.

[0067] like Figure 2 As shown, in order to obtain the synchronous trigger voltage and synchronous trigger signal of the pyrotechnic product, the trigger signal generating module includes two resistors R1 with the same resistance value. The two resistors R1 are connected in series and in parallel at both ends of the pyrotechnic product. A trigger signal output terminal is provided between the two resistors R1, and the trigger signal output terminal is connected to the on-off signal detection unit.

[0068] like Figure 4As shown, in order to detect the resistance of the pyrotechnic product before and after it is powered on, the resistance measurement unit includes a digital multimeter and a product resistance measurement switching module; the digital multimeter is connected to the isolated serial communication card and the product resistance measurement switching module; the product resistance measurement switching module is connected to the isolated serial communication card;

[0069] The product resistance measurement switching module includes a double-pole double-throw switch, the two COM pins of the double-pole double-throw switch are respectively connected to the two ends of the pyrotechnic device; the two NC pins of the double-pole double-throw switch are connected; and the two NO pins of the double-pole double-throw switch are respectively connected to the wiring terminals of the digital multimeter. Figure 5 When the double-pole double-throw switch is in the 2-1 position, the digital multimeter can measure the resistance of the pyrotechnic device.

[0070] like Figure 5 As shown, the on-off signal detection unit includes an on-off time and state display module and a multi-channel on-off signal conditioning module;

[0071] The multi-channel on-off signal conditioning module includes a connected signal isolation module and a level matching module, and the multiple on-off targets are all connected to the signal isolation module;

[0072] The on-off time and status display module includes a time acquisition module and a status display module;

[0073] The time acquisition module includes a latch and a counter arranged on the MCU microcontroller; the latch and the counter are connected to the level matching module, and the counter is connected to the communication serial port and the trigger signal output terminal; the counter starts working when it obtains the rising edge (or falling edge) of the trigger signal, and stops working when the counter receives the rising edge (or falling edge) of the probe input signal. The counting time between the start and the stop is the on-off time, and the on-off time is output through the communication serial port.

[0074] The status display module includes an LED1 driving circuit and an LED2 driving circuit connected in series between a latch and an AC / DC power supply; an indicator light LED1 is provided between the LED1 driving circuit and the AC / DC power supply; an inverter is provided between the LED2 driving circuit and the latch, and an indicator light LED2 is provided between the LED2 driving circuit and the AC / DC power supply.

[0075] The MCU samples and compares the probe signal in real time. If the probe on / off state is consistent with the configuration state, a high level is output. If the probe state is inconsistent with the configuration state, a low level is output. At this time, the indicator LED1 is on, and after the inverter, the high level drives the indicator LED2 to light up.

[0076] like Figure 6As shown, in order to ensure the safety of the test operation, a safety interlocking unit is also included, which includes a proximity switch arranged on the door frame of the isolation door, and a line safety switch connected in series in the discharge circuit, and two contacts of the line safety switch are respectively connected to the source of the P-MOS tube and one end of the pyrotechnics;

[0077] The MCU is connected to the coils of relays K1, K2 and K3;

[0078] One end of the proximity switch is connected to the ground, the armature of the relay K3, one end of the indicator LED4 and the AC / DC power supply, and the other end of the proximity switch is connected to one end of the indicator LED3;

[0079] The other end of the indicator LED3 is connected to the contact of the relay K1, and the armature of the relay K1 is grounded;

[0080] The other end of the indicator LED4 is connected to the contact of the relay K2, and the armature of the relay K2 is grounded;

[0081] The contact of the relay K3 is connected to the control terminal of the line safety switch, and the ground terminal of the line safety switch is grounded.

[0082] When the isolation door is closed, the proximity switch is closed, and the MCU receives a voltage signal to control relay K1 to close, relay K2 to disconnect, and relay K3 to close. At this time, indicator light LED3 is on, indicator light LED4 is off, and the line safety switch is closed. The pyrotechnics can be detonated by closing the ignition switch.

[0083] When the isolation door is opened, the proximity switch is disconnected, and the MCU receives a 0 VDC voltage signal, controlling relay K1 to disconnect, relay K2 to close, and relay K3 to disconnect. At this time, indicator LED3 is off, indicator LED4 is on, and the line safety switch is disconnected, indicating that the operating room is safe and can be entered for manual operation.

[0084] like Figure 7 As shown, the on-off target includes a probe, which is a twisted pair formed by two enameled wires twisted together; one of the enameled wires is connected to the cathode of the first TVS diode, and the other enameled wire is connected to the anode of the first TVS diode, and the anode of the first TVS diode is grounded; the cathode of the first TVS diode is connected to the signal isolation module and one end of the resistor R2, and the other end of the resistor R2 is connected to the cathode of the diode and the cathode of the second TVS diode; the anode of the second TVS diode is grounded, and the anode of the diode is connected to the AC / DC power supply.

[0085] During measurement, after the pyrotechnics explode at the test point, the two twisted pairs of the probe are connected to generate a signal; the on-off signal detection unit is protected from damage by transient overvoltage by the first TVS diode and the second TVS diode.

[0086] 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. An ignition timing system for explosives, characterized in that: Includes a control room and a test room separated by isolation doors; The control room is provided with an industrial computer unit, and an ignition energy generation unit, a resistance measurement unit, and an on-off signal detection unit connected thereto via an isolated serial port communication card, and the ignition energy generation unit and the on-off signal detection unit are also connected to the industrial computer unit via a multi-channel high-speed signal acquisition card; The test room is equipped with an explosion-proof device, and the explosive device is placed in the explosion-proof device; The pyrotechnic device is connected to the ignition energy control unit, and a plurality of test points are arranged on the pyrotechnic device, and a continuity target is arranged on the test points; the plurality of continuity targets are all connected to the continuity signal detection unit; The on-off signal detection unit includes an on-off time and status display module and a multi-channel on-off signal conditioning module; The multi-channel on-off signal conditioning module includes a connected signal isolation module and a level matching module, and the multiple on-off targets are all connected to the signal isolation module; The on-off time and status display module includes a time acquisition module and a status display module; The time acquisition module includes a latch and a counter provided on the MCU single chip; the latch and the counter are connected to the level matching module, and the counter is connected to the communication serial port and the trigger signal output terminal; The state display module includes an LED1 driving circuit and an LED2 driving circuit connected in series between a latch and an AC / DC direct current power supply; An indicator light LED1 is provided between the LED1 driving circuit and the AC / DC power supply; An inverter is provided between the LED2 driving circuit and the latch, and an indicator light LED2 is provided between the LED2 driving circuit and the AC / DC power supply; The on-off target includes a probe, which is a twisted pair formed by two enameled wires twisted together; One of the enameled wires is connected to the cathode of the first TVS diode, the other enameled wire is connected to the anode of the first TVS diode, and the anode of the first TVS diode is grounded; The cathode of the first TVS diode is connected to the signal isolation module and one end of the resistor R2, and the other end of the resistor R2 is connected to the cathode of the diode and the cathode of the second TVS diode; the anode of the second TVS diode is grounded, and the anode of the diode is connected to the AC / DC power supply.

2. The ignition timing system for explosives according to claim 1, characterized in that: The ignition energy generation unit includes an ignition capacitor and an ignition trigger signal generation module, and a capacitor charging and discharging module connected in parallel at both ends of the ignition capacitor; The pyrotechnic device is connected in series in the discharge circuit of the capacitor charge and discharge module; The ignition trigger signal generation module is connected to the discharge circuit of the capacitor charge and discharge module, and is connected to the industrial computer unit through a multi-channel high-speed signal acquisition card; The capacitor charging and discharging module is connected to the industrial computer unit via an isolated serial communication card.

3. The ignition timing system for explosives according to claim 2, characterized in that: The capacitor charging and discharging module includes a charging circuit and a discharging circuit connected in parallel at both ends of the ignition capacitor; The charging circuit comprises an AC / DC power supply, a charging switch, an anti-reverse connection diode and a charging current limiting resistor which are connected in series in sequence; the AC / DC power supply and the charging current limiting resistor are respectively connected to the two ends of the ignition capacitor; The discharge circuit includes a P-MOS tube, the drain of the P-MOS tube is connected to the ignition capacitor, 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 ignition capacitor; the gate of the P-MOS tube is connected to the ignition trigger signal generation module.

4. The ignition timing system for explosives according to claim 2, characterized in that: The ignition trigger signal generation module includes an MCU single chip computer, an ignition signal generation module and a trigger signal generation module; The MCU single chip is connected to the isolated serial communication card via a communication serial port; The ignition signal generating module comprises a Darlington transistor, wherein the first pin and the fourth pin of the Darlington transistor are respectively connected to one end of a resistor R28 and a resistor R31, the other end of the resistor R28 is connected to an AC / DC power supply, and the other end of the resistor R31 is connected to an AC / DC power supply; The second pin of the Darlington transistor is connected to the first pin of the triode Q4, the second pin of the triode Q4 is connected to the MCU single chip computer, and the third pin of the triode Q4 is grounded; The third pin of the Darlington transistor is connected to the gate of the P-MOS tube; The trigger signal generating module comprises two resistors R1 with the same resistance value. The two resistors R1 are connected in series and in parallel to two ends of the pyrotechnics. A trigger signal output terminal is arranged between the two resistors R1 and the trigger signal output terminal is connected to the on-off signal detecting unit.

5. The ignition timing system for explosives according to claim 1, characterized in that: The resistance measuring unit includes a digital multimeter and a product resistance measurement switching module; The digital multimeter is connected to the isolated serial communication card and the product resistance measurement switching module; the product resistance measurement switching module is connected to the isolated serial communication card; The product resistance measurement switching module includes a double-pole double-throw switch, and two COM pins of the double-pole double-throw switch are respectively connected to the two ends of the pyrotechnic device; The two NC pins of the double-pole double-throw switch are connected; The two NO pins of the double-pole double-throw switch are respectively connected to the connection terminals of the digital multimeter.

6. The ignition timing system for explosives according to claim 4, characterized in that: It also includes a safety interlocking unit, which includes a proximity switch arranged on the door frame of the isolation door and a line safety switch connected in series in the discharge circuit, wherein two contacts of the line safety switch are respectively connected to the source of the P-MOS tube and one end of the pyrotechnic device; The MCU single chip is connected to the coils of relay K1, relay K2 and relay K3; One end of the proximity switch is connected to the ground, the armature of the relay K3, one end of the indicator LED4 and the AC / DC power supply, and the other end of the proximity switch is connected to one end of the indicator LED3; The other end of the indicator light LED3 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 LED4 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 line safety switch, and the ground end of the line safety switch is grounded.

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