An anti-static ignition control circuit and ignition control method for explosives

Abstract

The present invention belongs to the field of electrical systems and relates to an anti-static pyrotechnic safety ignition control circuit and an ignition control method. The circuit includes a control computer, a control unit, and an ignition unit. The control computer is connected to the control unit, and the control unit is connected to the ignition unit. The anti-static pyrotechnic ignition control circuit and ignition control method provided by the present invention improve the safety of pyrotechnic use and ensure the personal safety of workers.

Description

Technical Field

[0001] The invention belongs to the field of electrical systems and relates to an anti-static ignition control circuit and an ignition control method for pyrotechnic devices. Background Art

[0002] Explosive devices are widely used in aerospace systems, and the safety and reliability of their ignition circuits are particularly important. During use, transportation, and storage, static electricity (e.g., induction charging) can occur in the ignition circuit. In severe cases, the resulting current can cause the ignition device to ignite unexpectedly, posing a safety hazard. Therefore, to ensure personnel safety, a safe, anti-static ignition control circuit and ignition control method are urgently needed. This method can remotely determine whether to ignite the ignition device based on the collected ignition device status. Summary of the Invention

[0003] Purpose of the present invention:

[0004] The purpose of the present invention is to provide an anti-static ignition control circuit and an ignition control method for pyrotechnics, so as to improve the safety of pyrotechnics and ensure the personal safety of workers.

[0005] The technical solution of the present invention:

[0006] An anti-static pyrotechnic safety ignition control circuit comprises a control computer, a control unit and an ignition unit. The control computer is connected to the control unit, and the control unit is connected to the ignition unit.

[0007] Furthermore, the control computer includes a computer power supply and an enabling switch, the control unit includes an ignition power supply, a current limiting resistor, an ignition safety switch, a condition satisfaction relay, an ignition relay, an enabling relay, and a software control module, and the ignition unit includes an initiator;

[0008] The positive pole of the ignition power supply is connected to one end of the positive contact of the ignition safety switch K1, and the other end of the positive contact is connected to pin 3 of the relay. The ground of the ignition power supply is connected to one end of the negative contact of the ignition safety switch K1 through a current limiting resistor, and the other end of the negative contact is connected to pin 6 of the relay. The condition is met and pin 8 of the relay is connected to the software control module. The condition is met and pin 7 of the relay is grounded. The condition is met and pin 1 of the relay is connected to pin 3 of the ignition relay. The condition is met and pin 4 of the relay is connected to pin 6 of the ignition relay. Pin 8 of the ignition relay is connected to the software control module. Pin 7 of the ignition relay is grounded. Pin 1 of the ignition relay is connected to pin 3 of the allow relay. Pin 4 of the ignition relay is connected to pin 6 of the allow relay. Pins 2 and 5 of the relay are short-circuited. Pin 8 of the relay is connected to the allow switch. Pin 7 of the relay is connected to the computer power ground. Pins 1 and 4 of the relay are respectively connected to the positive and negative poles of the pyrotechnics, and the pyrotechnics are connected to the software control module.

[0009] Furthermore, the control computer also includes an enabling control relay, and pin 8 of the enabling relay is connected to the enabling control relay via an enabling switch.

[0010] Furthermore, the ignition relay is a JQX-87M / 028-3-5 type relay.

[0011] Furthermore, the control relay is allowed to be JZC-078M / 027-3-4 type relay.

[0012] Furthermore, the relay that meets the conditions is a JZC-078M / 027-3-4 relay.

[0013] Furthermore, the relay is allowed to be a JZC-078M / 027-3-4 type relay.

[0014] An ignition control method for an anti-static pyrotechnic device safety ignition control circuit comprises the following steps:

[0015] Step 1: Power on the control computer and control unit, and open the control software in the control computer and software control module;

[0016] Step 2: Turn on the ignition power supply and close the ignition safety switch;

[0017] Step 3: The software control module in the control unit collects the status of the pyrotechnic device and sends it to the control computer. After the control computer determines that the pyrotechnic device meets the ignition conditions, it outputs the DO signal through the software control module and connects the relay if the conditions are met.

[0018] Step 4: The software control module outputs the ignition DO signal and turns on the ignition relay;

[0019] Step 5: Close the ignition permission switch, the permission control relay is turned on, the control computer outputs the permission DO signal, and the permission relay is turned on. At this time, the ignition circuit loop is connected, and the ignition circuit outputs current to complete the ignition of the pyrotechnic device.

[0020] Beneficial effects of the present invention

[0021] The present invention provides an anti-static ignition control circuit and ignition control method for pyrotechnic devices, which have the following specific advantages:

[0022] 1) Set the permission relay. When the pyrotechnic device is not in operation, the relay's pins 2 and 5 will be short-circuited. At this time, there is no voltage difference between pins 1 and 4, and the voltage at both ends of the pyrotechnic device is the same, so no current will be generated. This avoids the voltage difference at both ends of the pyrotechnic device and the generation of current, effectively preventing the pyrotechnic device from mis-igniting due to induction electrification during use, transportation, and storage. Setting the circuit short-circuit at the relay can reduce equipment loss and avoid ignition errors.

[0023] 2) Set up an ignition safety switch and close the switch only when the pyrotechnic device is officially ignited to avoid accidental ignition of the pyrotechnic device during testing and improve the safety of the ignition circuit.

[0024] 3) A three-level serial control system is used to control different relays through the control computer and control unit respectively. The ignition circuit can only be connected when the two devices meet the conditions at the same time, avoiding accidental ignition of pyrotechnics due to software failure or hardware loss of control during normal operation or testing.

[0025] 4) After determining that the ignition conditions are met based on the ignition unit status information, the DO signal is used to control the relay to close, thereby realizing remote control of the ignition of the pyrotechnic device, improving the safety of the ignition circuit, and effectively ensuring the safety of personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a circuit structure principle diagram of the present invention;

[0027] Figure 2 It is a flow chart of the circuit ignition control method of the present invention. DETAILED DESCRIPTION

[0028] Example 1: Figure 1 As shown, the present invention proposes an anti-static pyrotechnic safety ignition control circuit: comprising a control computer, a control unit, an ignition unit and a cable, wherein the control computer comprises a computer power supply, an enabling switch, and an enabling control relay, the control unit comprises an ignition power supply, a current limiting resistor, an ignition safety switch, a condition-satisfied relay, an ignition relay, an enabling relay, and a software control module, and the ignition unit comprises a pyrotechnic device,

[0029] The positive pole of the ignition power supply is connected to one end of the positive contact of the ignition safety switch K1, and the other end of the positive contact is connected to pin 3 of the relay. The ground of the ignition power supply is connected to one end of the negative contact of the ignition safety switch K1 through a current limiting resistor, and the other end of the negative contact is connected to pin 6 of the relay. The condition is met and pin 8 of the relay is connected to the software control module. The condition is met and pin 7 of the relay is grounded. The condition is met and pin 1 of the relay is connected to pin 3 of the ignition relay. The condition is met and pin 4 of the relay is connected to pin 6 of the ignition relay. Pin 8 of the ignition relay is connected to the software control module. Pin 7 of the ignition relay is grounded. Pin 1 of the ignition relay is connected to pin 3 of the allow relay. Pin 4 of the ignition relay is connected to pin 6 of the allow relay. Pins 2 and 5 of the relay are short-circuited. Pin 8 of the allow relay is connected to the allow control relay through the allow switch. Pin 7 of the allow relay is connected to the computer power ground. Pins 1 and 4 of the allow relay are respectively connected to the positive and negative poles of the pyrotechnics, and the pyrotechnics are connected to the software control module.

[0030] When the pyrotechnic device is not in operation, pins 2 and 5 of the relay will be allowed to be short-circuited. At this time, there is no voltage difference between pins 1 and 4, and the voltage at both ends of the pyrotechnic device is the same, so no current will be generated. This avoids the voltage difference at both ends of the pyrotechnic device and the generation of current, and prevents the pyrotechnic device from accidentally igniting due to static electricity phenomena such as induction electrification. The circuit short-circuit is set at the relay, and the same cable can be used for testing and operation to avoid ignition errors caused by the cable and equipment loss caused by cable replacement.

[0031] The software control module of the control unit collects the status of the ignition unit to determine whether the ignition conditions are met. The software control module feeds back the status information to the control computer, and the staff can remotely control the ignition of the pyrotechnics at the control computer.

[0032] The ignition circuit is powered by a control unit and adopts three-level serial control power supply. The pyrotechnic device can be powered only when all three-level relays are connected. The pyrotechnic device can be powered off when any relay is disconnected, thus ensuring the ignition safety of the pyrotechnic device from the hardware circuit aspect.

[0033] Use the control software in the control computer and control unit to output discrete DO signals. The discrete DO signals control different relays in the three-level serial control respectively. If a single software fails or is misoperated, causing the circuit switch and relay to close, the ignition circuit will not be connected, avoiding accidental ignition of pyrotechnics.

[0034] Example 2:

[0035] The present invention provides an ignition control method for an anti-static pyrotechnic safety ignition control circuit. The ignition circuit is powered by a control unit and adopts three-level serial control. The pyrotechnic ignition can only be achieved when three relays are connected and two switches are closed at the same time.

[0036] 1) Connect the cables and power cords, ensure normal communication between the control computer, control unit and ignition unit, power on the computer and control unit, and open the corresponding control software.

[0037] 2) Close the ignition safety switch and turn on the ignition power.

[0038] 3) After the software judges that the ignition unit status collected by the control unit meets the ignition conditions, the staff controls the computer software to output the DO signal of the condition, and the relay is closed at this time.

[0039] 4) The staff uses the control computer software to output the ignition DO signal in the control unit, and the ignition relay is closed.

[0040] 5) The operator closes the ignition enable switch, and the control computer outputs the DO signal, which turns on the enable relay. At this point, the ignition circuit loop is connected, and the ignition circuit outputs current to complete the ignition of the explosive device.

Claims

1. An anti-static pyrotechnics safety ignition control circuit, characterized in that: It includes a control computer, a control unit, and an ignition unit. The control computer is connected to the control unit, and the control unit is connected to the ignition unit; the control computer includes a computer power supply and an enabling switch, the control unit includes an ignition power supply, a current limiting resistor, an ignition safety switch, a condition-satisfying relay, an ignition relay, an enabling relay, and a software control module, and the ignition unit includes an initiator; the positive pole of the ignition power supply is connected to one end of the positive contact of the ignition safety switch K1, and the other end of the positive contact is connected to pin 3 of the condition-satisfying relay. The ground of the ignition power supply is connected to one end of the negative contact of the ignition safety switch K1 through a current limiting resistor, and the other end of the negative contact is connected to pin 6 of the condition-satisfying relay. Pin 8 of the condition-satisfying relay is connected to the software control module, and pin 7 of the condition-satisfying relay is connected to Ground, the condition is met that pin 1 of the relay is connected to pin 3 of the ignition relay, the condition is met that pin 4 of the relay is connected to pin 6 of the ignition relay, pin 8 of the ignition relay is connected to the software control module, pin 7 of the ignition relay is grounded, pin 1 of the ignition relay is connected to pin 3 of the permission relay, pin 4 of the ignition relay is connected to pin 6 of the permission relay, pins 2 and 5 of the permission relay are short-circuited, pin 8 of the permission relay is connected to the permission switch, pin 7 of the permission relay is connected to the computer power ground, pins 1 and 4 of the permission relay are respectively connected to the positive and negative poles of the pyrotechnics, and the pyrotechnics are connected to the software control module; the control computer also includes an permission control relay, and pin 8 of the permission relay is connected to the permission control relay through the permission switch.

2. The anti-static pyrotechnics safety ignition control circuit according to claim 1, characterized in that: The ignition relay is JQX-87M / 028-3-5 type relay.

3. The anti-static pyrotechnics safety ignition control circuit according to claim 1, characterized in that: The allowed control relay is JZC-078M / 027-3-4 relay.

4. The anti-static pyrotechnics safety ignition control circuit according to claim 1, characterized in that: The relay that meets the conditions is JZC-078M / 027-3-4 type relay.

5. The anti-static pyrotechnics safety ignition control circuit according to claim 1, characterized in that: The allowed relay is JZC-078M / 027-3-4 type relay.

6. An ignition control method for an anti-static pyrotechnic device safety ignition control circuit according to any one of claims 1 to 5, characterized in that: The following steps are involved: Step 1: Power on the control computer and control unit, and open the control software in the control computer and software control module; Step 2: Turn on the ignition power supply and close the ignition safety switch; Step 3: The software control module in the control unit collects the status of the pyrotechnic device and sends it to the control computer. After the control computer determines that the pyrotechnic device meets the ignition conditions, it outputs the DO signal through the software control module and connects the relay if the conditions are met. Step 4: The software control module outputs the ignition DO signal and turns on the ignition relay; Step 5: Close the ignition permission switch, the permission control relay is turned on, the control computer outputs the permission DO signal, and the permission relay is turned on. At this time, the ignition circuit loop is connected, and the ignition circuit outputs current to complete the ignition of the pyrotechnic device.

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