CN209459520U - The Initiator Safety firing circuit of ignition signal exception can be overcome - Google Patents

Abstract

The utility model discloses the Initiator Safety firing circuit that one kind can overcome ignition signal exception, solve the problems, such as that the inherent shortcoming of existing priming system firing circuit is easy to cause ignition signal to export extremely.Including power on delay differential protection appts circuit (1), control power supply and priming supply isolation protective circuit (2), door control protection electric circuit (3) and signal drive circuit (4); after undergoing three-level safety precautions; circuit safety; ignition signal controllably exports; finally high level is exported from the output end of the second nor gate; by the 8th resistance (R8) driving the second triode (V2) movement of current limliting, realizes that signal is amplified to firing tip, realize the safely controllable movement of priming system.Powerful guarantee is provided for the ignition security of fire control system.

Description

The Initiator Safety firing circuit of ignition signal exception can be overcome

Technical field

The present invention relates to a kind of underwater kit igniter, in particular to a kind of firing circuit of underwater kit igniter.

Background technique

Priming system is the explosion part equipped with explosive, such as blasting bolt, they are the connections by circuit, are fired with current point Explosive in explosion part, it is mechanically decoupled to realize by the explosion of explosion part, under water in separating mechanism, the application of priming system It is relatively broad；With the continuous promotion of underwater kit fire control technology, the security requirement of priming system igniting is also increasingly stringenter. In the assembly of priming system, transhipment and test, the consequence of the exception once fire control system is under fire, false triggering ignition priming system is very tight Weight.Currently, being more to focus on system software reliability, firer itself in conventional fire control system safety Design Safety indexes and personnel's safe operation consciousness etc., these measures cannot fundamentally solve fire control system firing circuit Inherent shortcoming, especially during Qiang Jing electricity, power jitter, strong electromagnetic, electrification reset and port level shakiness etc. is each A link is likely to cause the abnormal output of ignition signal, causes priming system to act, how to overcome consolidating for these firing circuits Defective is live problem in urgent need to solve.

Summary of the invention

The present invention provides the Initiator Safety firing circuits that one kind can overcome ignition signal exception, solve existing firer The technical issues of inherent shortcoming of product firing circuit is easy to cause ignition signal to export extremely.

The present invention is to solve the above technical problem by the following technical programs:

A kind of Initiator Safety firing circuit overcoming ignition signal exception, including power on delay differential protection appts circuit, Control power supply and priming supply isolation protective circuit, door control protection electric circuit and signal drive circuit, power on delay differential protection appts The anode of control power supply in circuit is linked together by the anode of first resistor and first capacitor, the cathode of first capacitor with Control power ground links together, the anode with the power supply end and control power supply of door in priming supply isolation protective circuit It links together, ignition signal is connected on the first input end with door, just with the second input terminal and first capacitor of door Pole links together, and is linked together with the output end of door by second resistance and the light emitting diode anode of non-linear optocoupler, The light emitting diode cathode of non-linear optocoupler links together with control power ground, the output end collector and point of non-linear optocoupler Ignition source links together, the output end emitter of non-linear optocoupler and first of the first nor gate in door control protection electric circuit Input terminal links together, and the first input end of the first nor gate and the second input terminal of the first nor gate are shorted together, the The first input end of one end and the first nor gate after three resistance are in parallel with the second filter capacitor links together, 3rd resistor with The other end after second filter capacitor is in parallel with priming supply links together, the output end of the first nor gate and second or non- The first input end of door links together, and priming supply is linked together by the anode of the 4th resistance and third capacitor, third The cathode of capacitor and the second input terminal of the second nor gate link together, the cathode of third capacitor by the 5th current-limiting resistance with The base stage of first triode links together, and the emitter of the first triode with priming supply links together, in third electricity It is connected with the 6th resistance between the cathode and priming supply ground of appearance, is connected between the collector and priming supply ground of the first triode It is connected to the 4th capacitor, is connected with the 7th current-limiting resistance between the output end of the second nor gate and the collector of the first triode； Priming supply, the emitter of the second triode and firer are connected on the collector of the second triode in signal drive circuit One end of product links together, and the other end of priming system with priming supply links together, the second triode base stage with The 9th resistance is connected between priming supply ground, the base stage of the second triode passes through the collector of the 8th resistance and the first triode It links together.

Power supply electrifying moment is controlled, 70% required time that the voltage in first capacitor boosts to control power supply from 0 volt is 200 milliseconds.

Circuit structure of the present invention is simple, and igniting effectively inhibits electrification reset, power supply by multilevel security safeguard measure The environmental factors such as shake, electrostatic and strong electromagnetic interfere fiery road, have provided and try hard to keep for the ignition security of fire control system Barrier.

Detailed description of the invention

Fig. 1 is electrical block diagram of the invention.

Specific embodiment

The present invention is described in detail with reference to the accompanying drawing:

A kind of Initiator Safety firing circuit overcoming ignition signal exception, including power on delay differential protection appts circuit 1, Power supply and priming supply isolation protective circuit 2, door control protection electric circuit 3 and signal drive circuit 4 are controlled, power on delay differential is protected The positive VCC of control power supply in protection circuit 1 is linked together by first resistor R1 and the anode of first capacitor C1, the first electricity The cathode and control power ground for holding C1 link together, the power supply end with door D1A in priming supply isolation protective circuit 2 With control power supply positive VCC link together, be connected with ignition signal on the first input end of door D1A, with door D1A's The anode of second input terminal and first capacitor C1 links together, with the output end of door D1A by second resistance R2 with it is non-linear The light emitting diode anode of optocoupler D2 links together, and the light emitting diode cathode of non-linear optocoupler D2 is connect with control power ground Together, the output end collector of non-linear optocoupler D2 links together with priming supply VDD, the output end of non-linear optocoupler D2 The first input end of emitter and the first nor gate D3A in door control protection electric circuit 3 links together, the first nor gate D3A The second input terminal of first input end and the first nor gate D3A be shorted together, 3rd resistor R3 and the second filter capacitor C2 The first input end of one end and the first nor gate D3A after parallel connection links together, 3rd resistor R3 and the second filter capacitor C2 The other end after parallel connection with priming supply links together, and the of the output end of the first nor gate D3A and the second nor gate D3D One input terminal links together, and priming supply VDD is linked together by the anode of the 4th resistance R4 and third capacitor C3, third The cathode of capacitor C3 and the second input terminal of the second nor gate D3D link together, and the cathode of third capacitor C3 passes through the 5th limit Leakage resistance R5 and the base stage of the first triode V1 link together, and the emitter of the first triode V1 with priming supply is connected to Together, it is connected with the 6th resistance R6 between the cathode and priming supply ground of third capacitor C3, in the current collection of the first triode V1 The 4th capacitor C4 is connected between pole and priming supply ground, in the output end of the second nor gate D3D and the collection of the first triode V1 The 7th current-limiting resistance R7 is connected between electrode；It is connected on the collector of the second triode V2 in signal drive circuit 4 Priming supply VDD, one end of the emitter and priming system HGP of the second triode V2 link together, the other end of priming system HGP It with priming supply links together, is connected with the 9th resistance R9 between the base stage and priming supply ground of the second triode V2, The base stage of second triode V2 is linked together by the collector of the 8th resistance R8 and the first triode V1.

Controlling power supply VCC powered on moment, first capacitor C1 is to the voltage value of control power ground, because of differential delay circuit, 70% 200 milliseconds of the needs that voltage boosts to control power supply VCC from 0 volt are determined as when voltage value is greater than the value with door D1A High level, this time can be controlled by first resistor R1 and first capacitor C1, it is to be ensured that pressure rising time is greater than control chip Power-on reset time, general power-on reset time less than 100 milliseconds, and the voltage on ignition signal and first capacitor C1 be with Mode access with door D1A, therefore during electrification reset, if ignition signal port level is unstable, the electricity on first capacitor C1 Pressure is always low level, not will cause and generates high level signal with door D1A output end, and mistakenly connects priming supply VDD, should Measure is first order safety precautions.

It is defeated with door D1A if ignition signal also exports high level when the voltage of first capacitor C1 is gradually upgraded to high level Outlet drives the lumination of light emitting diode in non-linear optocoupler D2 to act by second resistance R2, in view of the front end non-linear optocoupler D2 To control power supply, the rear end of non-linear optocoupler D2 is priming supply, is isolated by the photoelectric coupling to two groups of power supplys, realizes control The electrical isolation of terminal circuit processed and igniting terminal circuit, effectively eliminates the interference that the shake of two groups of power supplys may cause route, hinders The only electromagnetic interference that circuit linearity coupling generates, while solving control electricity and ignition voltage value mismatch problem, this measure is Secondary safety safeguard measure.

The output end signal of non-linear optocoupler D2 is directly accessed the defeated of the first nor gate D3A in a control protection electric circuit 3 Enter end, the second capacitor C2 and 3rd resistor R3 played a filtering role is incorporated between signal incoming end and priming supply ground, can be had Effect eliminates the environmental factors such as electrostatic to instantaneous interference caused by the first nor gate D3A input terminal；The input of first nor gate D3A Original state is held with pulling down to priming supply, to be always low level, by two-stage OR-NOT circuit, ensure that by 3rd resistor R3 The output end of second nor gate D3D is 0 volt of low level, be ensure that before priming supply VDD is powered on, the safety of firing circuit.? The cathode of priming supply VDD powered on moment, third capacitor C3 is high level, and the output end of the second nor gate D3D is always 0 volt, First triode V1 is in off state；If strong electromagnetic or other adverse circumstances, it is high for will cause the output end of D3D extremely Level keeps the first triode V1 in the conductive state, and generated current signal enters directly into igniting by the 7th resistance R7 In power ground, which will not flow to the 8th resistance R8, and the second triode V2 will not be driven to be connected, this measure is the third level Safety precautions, after undergoing three-level safety precautions, circuit safety.

Claims (2)

1. one kind can overcome the Initiator Safety firing circuit of ignition signal exception, including power on delay differential protection appts circuit (1), Power supply and priming supply isolation protective circuit (2), door control protection electric circuit (3) and signal drive circuit (4) are controlled, feature exists In the anode (VCC) of the control power supply in power on delay differential protection appts circuit (1) passes through first resistor (R1) and first capacitor (C1) anode links together, and cathode and the control power ground of first capacitor (C1) link together, and priming supply isolation is protected In protection circuit (2) with the power supply end of door (D1A) and control the anode (VCC) of power supply and link together, with door (D1A) First input end on be connected with ignition signal, be connected to the second input terminal of door (D1A) and the anode of first capacitor (C1) Together, it is connected to the output end of door (D1A) by second resistance (R2) and the light emitting diode anode of non-linear optocoupler (D2) Together, the light emitting diode cathode of non-linear optocoupler (D2) with control power ground link together, non-linear optocoupler (D2) it is defeated Outlet collector links together with priming supply (VDD), and output end emitter and the door control of non-linear optocoupler (D2) are protected The first input end of the first nor gate (D3A) in circuit (3) links together, the first input end of the first nor gate (D3A) It is shorted together with the second input terminal of the first nor gate (D3A), after 3rd resistor (R3) is in parallel with the second filter capacitor (C2) One end and the first input end of the first nor gate (D3A) link together, 3rd resistor (R3) and the second filter capacitor (C2) The other end after parallel connection with priming supply links together, the output end and the second nor gate (D3D) of the first nor gate (D3A) First input end link together, priming supply (VDD) is connect by the positive of the 4th resistance (R4) and third capacitor (C3) Together, the cathode of third capacitor (C3) and the second input terminal of the second nor gate (D3D) link together, third capacitor (C3) Cathode linked together by the base stage of the 5th current-limiting resistance (R5) and the first triode (V1), the hair of the first triode (V1) Emitter-base bandgap grading with priming supply links together, and is connected with the 6th resistance between the cathode and priming supply ground of third capacitor (C3) (R6), it is connected with the 4th capacitor (C4) between the collector and priming supply ground of the first triode (V1), in the second nor gate (D3D) the 7th current-limiting resistance (R7) is connected between the collector of output end and the first triode (V1)；Electricity is driven in signal Be connected with priming supply (VDD) on the collector of the second triode (V2) in road (4), the emitter of the second triode (V2) with One end of priming system (HGP) links together, and the other end of priming system (HGP) with priming supply links together, second It is connected with the 9th resistance (R9) between the base stage and priming supply ground of triode (V2), the base stage of the second triode (V2) passes through the Eight resistance (R8) and the collector of the first triode (V1) link together.

2. one kind according to claim 1 can overcome the Initiator Safety firing circuit of ignition signal exception, feature exists In controlling power supply (VCC) powered on moment, the voltage in first capacitor (C1) boosts to 70% institute of control power supply (VCC) from 0 volt Take time is 200 milliseconds.