Delayed ignition circuit and control method for tactical missile pyrotechnics

Abstract

The present invention provides a delayed ignition circuit and control method for tactical missile pyrotechnics, including: a signal acquisition and logic judgment circuit, a delayed ignition circuit, a power supply and charging circuit; acquiring both the spring switch quantity signal and the off-tube switch quantity signal, judging that both are valid at the same time, allowing the delayed ignition circuit to perform the ignition output action; controlling the delay time according to the external input, and delaying the output of the ignition current to the pyrotechnics when the external ignition conditions are met. The present invention provides a solution for delayed ignition of pyrotechnics in the process of tactical missile test verification, which is designed and implemented using a logic gate circuit to avoid the risk of accidental ignition caused by unstable computer IO port level or abnormal computer software operation, thereby ensuring the reliability and safety of the ignition circuit.

Description

Technical Field

[0001] The present invention relates to the technical field of tactical missile control, and in particular to a tactical missile pyrotechnic delayed ignition circuit and a control method, and in particular to a reliable and safe tactical missile pyrotechnic delayed ignition circuit. Background Art

[0002] The ignition of pyrotechnics on missiles is a key link in the missile flight test process. In the development of tactical missiles, in order to verify the separation technology of the booster cabin, the delayed ignition of the booster cabin electric squib in the separation test is involved to achieve the accurate separation of the missile body and the tail booster cabin. Therefore, the design of the pyrotechnics delayed ignition circuit must take into account both reliability and safety, ensuring that the signal can be reliably sent and preventing the signal from being triggered by mistake.

[0003] Patent document CN204666051U discloses a reliable and safe ignition circuit, which includes a power supply 1, a power supply 2, a PLC input module, a PLC output module, an electromagnetic relay KYF1, an electromagnetic relay KYF2, an electromagnetic relay Km3, an electromagnetic relay Km4, an electromagnetic relay KDH1, an electromagnetic relay KDH2, a resistor R1, a resistor R2, a resistor R3, a diode V1, a diode V2 and a diode V3; the peripheral circuit includes an ignition button S1, a resistor R4, a resistor R5, an initiator RDH1 and an initiator RDH2.

[0004] After literature search and research on existing technologies, it was found that in order to ensure the reliability and safety of the ignition circuit during the launch of tactical missiles, the ignition circuit control usually adopts electromagnetic relays and computer automatic control methods. The control process is that after the computer receives the missile launch command, it sends out IO control instructions, automatically controls the closure of multiple stages of electromagnetic relays in sequence, and sends the ignition voltage to the missile pyrotechnics.

[0005] However, this process has risks. Once the IO port level is unstable or the computer software runs abnormally during the computer startup ignition process, it will cause accidental ignition and cause safety accidents. Therefore, the delay ignition circuit design based on computer control also has the risk of inaccurate delay or accidental ignition due to abnormal computer software operation.

[0006] Based on this, it is urgent to propose a new delayed ignition circuit system for missile ejection separation test. Summary of the invention

[0007] In view of the defects in the prior art, the object of the present invention is to provide a delayed ignition circuit and control method for tactical missile pyrotechnics.

[0008] A delayed ignition circuit for tactical missile explosives provided by the present invention comprises: a signal acquisition and logic judgment circuit, a delayed ignition circuit, a power supply and charging circuit;

[0009] The signal acquisition and logic judgment circuit acquires both the flicking switch quantity signal and the off-tube switch quantity signal, and determines that both are valid at the same time, allowing the delayed ignition circuit to perform the ignition output action;

[0010] The time-delay ignition circuit controls the delay time according to the external input, and when the external ignition conditions are met, the ignition current is output to the pyrotechnic device with a delay;

[0011] The power supply and charging circuit provides power and outputs electricity for ignition.

[0012] Preferably, the signal acquisition and logic judgment circuit collects the flip switch quantity signal and the off-tube switch quantity signal only after the master control switch is turned on, wherein the delay ignition circuit controls the delay output of the ignition current to the pyrotechnic product according to the gate control delay time when the signal acquisition and logic judgment conditions are met. The gate control delay time has multiple levels and is equipped with a delay selection feedback signal.

[0013] Preferably, the time-delay ignition circuit comprises: a gating control circuit, a time-delay circuit, an ignition drive circuit, a discharge capacitor, and a voltage comparison circuit;

[0014] The gating control circuit adopts an analog switch gating device to select multiple delay times and returns a corresponding delay selection feedback signal through the missile system port;

[0015] The delay circuit adopts a monostable double trigger as a control device for the ignition pulse delay time;

[0016] The discharge capacitor cooperates with the charging circuit and the discharge circuit in the power supply and charging module to achieve the functional requirements;

[0017] The ignition drive circuit uses the current generated by the instantaneous discharge of the capacitor to act on the electric squib to ignite the pyrotechnics; the multi-channel ignition pulse width output by the ignition drive circuit is fixed to ensure the synchronous ignition of the multi-channel pyrotechnics; wherein, the ignition drive circuit uses a capacitor as an energy storage element, and is responsible for completing the ignition of the pyrotechnics through the discharge of the capacitor;

[0018] The voltage comparison circuit uses a voltage comparator to detect the capacitor voltage in the multi-channel ignition drive circuit.

[0019] Preferably, the power supply and charging circuit includes a power supply module, a power supply start circuit, and a DC\DC voltage stabilizing circuit;

[0020] The power supply start circuit adopts a magnetic latching relay to realize the function of turning on and off the power supply of the lithium battery pack;

[0021] The DC\DC voltage stabilizing circuit adopts a switching power supply chip to realize the conversion of the power supply, and outputs the required power through switching conversion.

[0022] Preferably, the multiple delay time selections are selected by the ground control equipment according to the delay ignition requirements, and the three delay ignition selections of 1.7s, 2.2s and 2.7s are performed through switch control;

[0023] The power supply start circuit activates the lithium battery pack to provide working power for the delayed ignition circuit according to the working level instruction sent by the ground control device, and the DC\DC module realizes the conversion of the secondary power supply used by each component in the delayed ignition circuit;

[0024] The gating control circuit determines the delayed ignition selection and returns a corresponding delayed confirmation notification through the corresponding indicator light;

[0025] The short-circuit protection circuit is closed, the ignition capacitor of the ignition drive circuit starts to charge, and the logic judgment circuit sends back a signal indicating that the capacitor is ready to charge;

[0026] Waiting for the missile to be launched, the signal acquisition circuit in the signal acquisition and logic judgment circuit acquires the missile's bounce switch signal and tube-leaving switch signal. After the logic judgment circuit in the signal acquisition and logic judgment circuit determines the valid bounce switch signal and tube-leaving switch signal, the delay circuit sends a start instruction to the ignition drive circuit according to the selected delay ignition time. The ignition drive circuit executes capacitor discharge to generate current acting on the pyrotechnic product, thereby achieving the function of executing the ignition of the booster separation electric squib.

[0027] Preferably, a logic gate circuit is used.

[0028] Preferably, it is suitable for tactical missile test verification, and the capacitor to be charged is short-circuited during the test.

[0029] Preferably, the discharge circuit automatically discharges the ignition capacitor after power failure.

[0030] A control method for a delayed ignition circuit of a tactical missile initiator provided by the present invention comprises the following steps:

[0031] Step 1: According to the delay ignition requirement, select the delay time through switch control;

[0032] Step 2: Send working level instructions through the ground control equipment to provide working power for the delayed ignition circuit;

[0033] Step 3: Determine the delayed ignition selection and return the corresponding delayed confirmation report;

[0034] Step 4: The ignition capacitor starts to charge and sends back a signal indicating that the capacitor is ready to charge.

[0035] Step 5: After the missile is launched, the bounce switch quantity signal and the off-tube switch quantity signal are sent to the signal acquisition and logic judgment circuit;

[0036] Step 6: According to the effective bounce switch quantity signal and the tube separation switch quantity signal, the delayed ignition circuit is made to perform multi-channel boost separation electric squib ignition according to the selected delay time.

[0037] According to a tactical missile testing method provided by the present invention, during the testing process, the control method is used to control the delayed ignition circuit of the tactical missile pyrotechnics.

[0038] Compared with the prior art, the present invention has the following beneficial effects:

[0039] 1. The present invention includes a signal acquisition and logic judgment circuit, a delayed ignition circuit, a power supply and charging circuit, and is a novel modular circuit that provides a solution for delayed ignition of pyrotechnics during tactical missile test verification.

[0040] 2. The present invention is designed and implemented using a logic gate circuit to avoid the risk of accidental ignition caused by unstable computer IO port level or abnormal computer software operation, thereby ensuring the reliability and safety of the ignition circuit.

[0041] 3. The present invention can provide short-circuit protection for the capacitor to be charged during the test, effectively avoiding the risk of ignition operation caused by incorrect charging of the capacitor, thereby ensuring the safety of the test product and test personnel.

[0042] 4. The present invention has a discharge circuit that can automatically discharge the ignition capacitor after power failure, so that static electricity will not accumulate on the capacitor, thereby ensuring the safety of the ignition circuit.

[0043] 5. The present invention can ensure the safe and reliable ignition of missile pyrotechnics. It has been verified through experiments that it can be effectively applied to ignition test verification. The design scheme is reasonable and feasible, with high integration and performance that meets technical requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0045] Figure 1 The invention is a schematic diagram of the working principle of the delayed ignition circuit of a tactical missile pyrotechnic device.

[0046] Figure 2 It is a schematic diagram of the working process of the ignition circuit of the present invention. DETAILED DESCRIPTION

[0047] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several changes and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0048] like Figure 1 As shown, a tactical missile pyrotechnic delayed ignition circuit provided according to the present invention is mainly used for delaying the ignition of missile pyrotechnics. It is designed and implemented using logic gate circuits to avoid risk points introduced by computer control. The tactical missile pyrotechnic delayed ignition circuit includes: a signal acquisition and logic judgment circuit, a delayed ignition circuit, and a power supply and charging circuit.

[0049] The signal acquisition and logic judgment circuit is mainly used to collect the bouncing switch quantity signal and the off-tube switch quantity signal, and the ignition output action can only be executed when the two are judged to be valid at the same time; wherein, the bouncing switch quantity signal indicates the movement of the missile; and the off-tube switch quantity signal indicates the situation of the missile leaving the barrel. Specifically, the signal acquisition and logic judgment circuit collects the bouncing switch quantity signal and the off-tube switch quantity signal after the master control switch is turned on. The logic judgment circuit judges the bouncing switch quantity signal and the off-tube switch quantity signal, and when it is detected that the bouncing switch quantity signal and the off-tube switch quantity signal are valid at the same time, the subsequent ignition output action and capacitor discharge action are executed.

[0050] The time-delay ignition circuit is mainly used to control the delay time according to the strobe control, and when the external ignition conditions are met, the ignition current is output to the pyrotechnic product with a delay according to the external input delay time. Specifically, when the signal acquisition and logic judgment conditions are met, the time-delay ignition circuit outputs the ignition current to the pyrotechnic product with a delay according to the strobe control delay time. The strobe control delay time has three levels of 1.7s, 2.2s, and 2.7s, and is equipped with a delay selection feedback signal.

[0051] The power supply and charging circuit is mainly used to provide power and output ignition power to the outside, and has a charging function to maintain the power consumption of the ignition circuit itself and output ignition power to the outside. Specifically, the power supply and charging circuit is used to provide power to each module and output ignition power to the outside, and has a charging function. The power supply module in the power supply and charging module is mainly realized by a lithium battery pack and a DC / DC voltage stabilizing circuit. The DC / DC voltage stabilizing circuit outputs the power required by each module through switch conversion. The power supply module has the function of master control opening and short circuit protection. The power supply and charging circuit includes a power supply opening circuit and a DC\DC voltage stabilizing circuit; the power supply opening circuit adopts a magnetic holding relay to realize the opening and closing function of the lithium battery pack power supply; the DC\DC voltage stabilizing circuit adopts a switching power supply chip to realize the conversion of the power supply for each module.

[0052] Wherein, the delayed ignition circuit includes: a gating control circuit, a delay circuit, an ignition drive circuit, a discharge capacitor, and a voltage comparison circuit. The gating control circuit uses an analog switch gating device to select three delay times, and returns the corresponding delay selection notification through the missile system port; the delay circuit uses a high-precision monostable double trigger as a control device for the ignition pulse delay time; the ignition drive circuit uses a capacitor to instantly discharge to generate a large current to act on the electric squib to ignite the pyrotechnics; the 6-way ignition pulse width output by the ignition drive circuit is fixed to ensure the synchronous ignition of the 6-way pyrotechnics. Wherein, the ignition drive circuit uses a capacitor as an energy storage element, and is responsible for completing the ignition of the pyrotechnics through capacitor discharge, which effectively reduces the demand for power supply in this way. The discharge capacitor needs to cooperate with the charging circuit and the discharge circuit in the power supply and charging module to achieve the functional requirements; the voltage comparison circuit uses a voltage comparator to detect the capacitor voltage in the 6-way ignition drive circuit.

[0053] Combine the following Figure 1 The working principle of the present invention is described.

[0054] First, the ground control equipment selects three delayed ignition options: 1.7s, 2.2s, and 2.7s through switch control according to the delayed ignition requirements;

[0055] Secondly, the ground control equipment sends a working level instruction to the power supply start circuit, the lithium battery pack is activated to provide the working power supply for the delayed ignition circuit, and the DC\DC module realizes the conversion of the secondary power supply used by each module of the delayed ignition circuit;

[0056] Next, the gate control circuit determines the delayed ignition selection and returns a corresponding delay confirmation notification through the corresponding indicator light;

[0057] Then, the short-circuit protection circuit is turned off, the ignition capacitor of the ignition drive circuit starts to charge, and a ready signal of capacitor charging is fed back through the logic judgment circuit;

[0058] Finally, wait for the missile to be launched. The signal acquisition circuit collects the missile's bounce switch signal and tube-leaving switch signal. After the logic judgment circuit determines the valid bounce switch signal and tube-leaving switch signal, the delay circuit sends a start command to the ignition drive circuit according to the selected delay ignition time. The ignition drive circuit executes capacitor discharge to generate a large current acting on the pyrotechnic product, thereby achieving the purpose of executing the ignition of the booster separation electric squib.

[0059] Combine the following Figure 2 The present invention is described in more detail. According to the present invention, the working process of the time-delay ignition circuit is provided, such as Figure 2 As shown, the workflow includes the following steps:

[0060] Step 1: Select the delay (three-stage selection), short circuit is effective;

[0061] Step 2: The master control is turned on and the delayed ignition circuit works;

[0062] Step 3: Determine the delay selection and return the delay report corresponding to the short circuit;

[0063] Step 4: Disconnect the short-circuit protection cover, the ignition capacitor starts to charge, and the capacitor charging ready signal is reported within 1 second;

[0064] Step 5: Wait for the missile to be launched, and wait for the receipt of the bounce signal and the tube-leave signal;

[0065] Step 6: After receiving the valid bounce signal and the tube separation signal, the 6-way boost separation electric squib ignition is executed according to the selected delay time.

[0066] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. A delayed ignition circuit for tactical missile explosives, characterized in that: include: Signal acquisition and logic judgment circuit, delayed ignition circuit, power supply and charging circuit; The signal acquisition and logic judgment circuit acquires both the flicking switch quantity signal and the off-tube switch quantity signal, and determines that both are valid at the same time, allowing the delayed ignition circuit to perform the ignition output action; The time-delay ignition circuit controls the delay time according to the external input, and when the external ignition conditions are met, the ignition current is output to the pyrotechnic device with a delay; The power supply and charging circuit provides power and outputs electricity for ignition. The signal acquisition and logic judgment circuit collects the flick switch quantity signal and the off-tube switch quantity signal only after the master control switch is turned on. When the signal acquisition and logic judgment circuit judgment conditions are met, the delay ignition circuit controls the delay time according to the selection control circuit to control the delay output of the ignition current to the pyrotechnic product; the selection control circuit has multiple levels of delay time control and is equipped with a delay selection feedback signal; The time-delay ignition circuit comprises: a gating control circuit, a time-delay circuit, an ignition drive circuit, a discharge capacitor, and a voltage comparison circuit; The gating control circuit adopts an analog switch gating device to select multiple delay times and returns a corresponding delay selection feedback signal through the missile system port; The delay circuit adopts a monostable double trigger as a control device for the ignition pulse delay time; The discharge capacitor cooperates with the charging circuit and the discharge circuit in the power supply and charging circuit to achieve the functional requirements; The ignition drive circuit uses the current generated by the instantaneous discharge of the discharge capacitor to act on the electric squib to ignite the pyrotechnics; the multi-channel ignition pulse width output by the ignition drive circuit is fixed to ensure the synchronous ignition of the multi-channel pyrotechnics; wherein, the ignition drive circuit uses the discharge capacitor as the energy storage element, and the discharge of the discharge capacitor is responsible for completing the ignition of the pyrotechnics; The voltage comparison circuit uses a voltage comparator to detect the discharge capacitor voltage in the multi-channel ignition drive circuit; The power supply and charging circuit includes a power supply module and a power supply start circuit; the power supply module is implemented by a lithium battery pack and a DC\DC voltage stabilizing circuit; The power supply start circuit adopts a magnetic latching relay to realize the function of turning on and off the power supply of the lithium battery pack; The DC\DC voltage stabilizing circuit adopts a switching power supply chip to realize the conversion of the power supply, and outputs the required power through switching conversion; The multiple delay time selection is that the ground control equipment controls the three delay ignition selections of 1.7s, 2.2s and 2.7s through the analog switch gating device according to the delay ignition demand; The power supply start circuit activates the lithium battery pack to provide the working power supply for the delayed ignition circuit according to the working level instruction sent by the ground control equipment, and the DC\DC voltage stabilizing circuit realizes the conversion of the secondary power supply used by each component in the delayed ignition circuit; The gating control circuit determines the delayed ignition selection and returns a corresponding delayed confirmation notification through the corresponding indicator light; The short-circuit protection circuit of the power supply module is closed, the discharge capacitor of the ignition drive circuit starts to charge, and the ready signal of the discharge capacitor charging is sent back through the logic judgment circuit; Waiting for the missile to be launched, the signal acquisition circuit in the signal acquisition and logic judgment circuit acquires the missile's bounce switch quantity signal and tube-leaving switch quantity signal. After the logic judgment circuit in the signal acquisition and logic judgment circuit determines the valid bounce switch quantity signal and tube-leaving switch quantity signal, the delay circuit sends a start instruction to the ignition drive circuit according to the selected delay ignition time, and the ignition drive circuit executes the discharge of the discharge capacitor to generate current acting on the pyrotechnic product, thereby achieving the effect of executing the ignition of the booster separation electric squib.

2. The delayed ignition circuit for tactical missile explosives according to claim 1, characterized in that: It is suitable for tactical missile test verification, and short-circuit protection is provided for the charging and discharging capacitors during the test.

3. The delayed ignition circuit for tactical missile initiators according to claim 1, characterized in that: The discharge circuit automatically discharges the discharge capacitor after power failure.

4. A method for controlling a delayed ignition circuit of a tactical missile initiator according to any one of claims 1 to 3, comprising the following steps: Step 1: According to the delay ignition requirement, the delay time is selected by controlling the analog switch gating device; Step 2: Send working level instructions through the ground control equipment to provide working power for the delayed ignition circuit; Step 3: Determine the delayed ignition selection and return the corresponding delayed confirmation report; Step 4: The discharge capacitor of the delayed ignition circuit starts to charge, and a ready signal for the discharge capacitor to be charged is sent back; Step 5: After the missile is launched, the bounce switch quantity signal and the off-tube switch quantity signal are sent to the signal acquisition and logic judgment circuit; Step 6: According to the effective bounce switch quantity signal and the tube separation switch quantity signal, the delayed ignition circuit is made to perform multi-channel boost separation electric squib ignition according to the selected delay time.

5. A method for testing a tactical missile, characterized in that: During the test, the control method of claim 4 is used to control the delayed ignition circuit of the tactical missile initiator according to any one of claims 1 to 3.

Images