Modularized series all-electronic fuse

Abstract

The invention discloses a modularized series all-electronic fuse which comprises a safety system control module, a preceding-stage boosting detonating module, a main-stage delay detonating module and a DC-DC power source. The frequency and the duty ratio of the dynamic pulse signal are detected in real time, and a control signal is output in real time by isolating a feedback voltage signal to control boosting of the pulse transformer and realize high-voltage and stable-voltage output. The two-stage static switch of the preceding stage is placed in a rear-stage safety system, the first-stage safety and the second-stage safety are removed by depending on rear-stage sensitive environment information, and the ground and the power supply of the high-voltage conversion circuit of the preceding stage fuse are positively connected respectively; the dynamic switch is placed in the preceding-stage high-voltage conversion module, the third-stage insurance of the preceding stage is relieved by depending on the low-voltage dynamic frequency signal transmitted by the backward stage, the signal transmission is an alternating pulse signal, the anti-interference capability is strong, the signal form of a logic control device is not depended, and the universality is better; the front-stage detonating module can become a universal detonating module and can be applied to detonating control design of different weapon platforms and civil electronic detonators.

Description

Technical Field

[0001] The invention relates to a modular series all-electronic fuze. Background Art

[0002] The reliability of the fuze system ensures safety during the detonation process. Compared with traditional mechanical fuzes, the fully electronic fuze uses insensitive charges instead of more sensitive explosives. Therefore, the safety and working reliability during service processing are essentially improved, and it can work reliably in a strong electromagnetic environment.

[0003] At present, a series warhead and an electronic delay electromechanical fuze or a fully electronic fuze are used. When hitting the target, the front-stage fuze acts first, and after a delay, the main-stage fuze acts to detonate the main-stage warhead. The single-stage penetration fuze is limited by the weapon system platform, and the warhead's target impact speed and its own mass are limited. Under the condition of low speed and large impact, the single-stage penetration may not meet the needs of attacking deep hard targets. The mechanical structure of the electromechanical fuze has poor anti-detonation overload impact resistance after the front-stage fuze explodes, and the detonation reliability is insufficient. The high-voltage pulse capacitor, high-voltage switch and delay circuit of the fully electronic fuze are not modularly designed. Affected by factors such as production technology and processing process, it is easy to have problems such as insufficient density and hardness of the potting glue, and the potting causes the device to fail, resulting in poor overload resistance or the fuze cannot act. On the other hand, the processing cost and component cost of the fully electronic fuze that resists overload impact are high, and the general equipment testability is poor. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a modular serial all-electronic fuze.

[0005] The present invention is achieved through the following technical solutions.

[0006] The present invention provides a modular series all-electronic fuze, comprising a safety system control module, a front-stage boost initiation module, a main-stage delayed initiation module, and a DC-DC power supply. The safety system control module comprises a controller, which is connected to a first-level fuse and a second-level fuse in sequence. The input end of the controller respectively inputs environmental and distance information signals and acceleration signals and communicates with a cable network. The controller is also respectively connected to the front-stage boost initiation module and the main-stage delayed initiation module. Both the front-stage boost initiation module and the main-stage delayed initiation module are provided with an isolated sampling feedback module, which inputs a front-stage safety status signal and a main-stage safety status signal into the controller. The front-stage boost initiation module is also provided with a third-level fuse.

[0007] The primary fuse includes static switches SW1 and SW2, one end of the static switches SW1 and SW2 are respectively connected to the two poles of the release power supply, the other end of the static switch SW1 is respectively connected to the dynamic switch SD1 and one pole of the filter circuit input end, the other end of the static switch SW2 is connected to one end of the primary side of the main-stage step-up transformer and the other pole of the filter circuit input end, the other end of the dynamic switch SD1 is connected to the other end of the primary side of the main-stage step-up transformer, the secondary side of the main-stage transformer is connected to the main-stage rectifier circuit, and the output end of the filter circuit is connected to the previous-stage step-up detonation circuit.

[0008] The dynamic switch SD1 is connected to the controller via an AND gate.

[0009] The front-stage boost ignition circuit includes a dynamic switch SD2, a front-stage boost transformer and a front-stage rectifier circuit. The input end of the front-stage rectifier circuit is connected to the filter circuit through the front-stage boost transformer. The dynamic switch SD2 is arranged between the front-stage boost transformer and the filter circuit. The output end of the front-stage rectifier circuit is connected to the high-voltage ignition circuit. The high-voltage ignition circuit is connected to the detonator assembly. The dynamic switch SD2 is connected to the controller through an AND gate.

[0010] The main-stage delayed detonation module includes a delay controller, the input end of the delay controller is connected to the controller, the delay controller is connected to the isolation drive module, the high-voltage detonation circuit, and the detonator assembly in sequence, and the high-voltage detonation circuit is connected to the main-stage rectifier circuit.

[0011] The delay controller is also connected to the signal identification and interface circuit.

[0012] The isolated sampling feedback module includes a capacitive isolation chip U2, wherein pin 8 of the capacitive isolation chip U2 is connected to the VCC3V3 power supply, pin 7 and pin 6 are connected to the positive and negative input terminals of the amplifier U1 through resistors R4 and R5, respectively, and pin 5 of the capacitive isolation chip U2 is grounded to pin 2 of the amplifier U1; pin 5 of the amplifier U1 is connected to the VCC3V3 power supply and is grounded through capacitor C2, pin 1 is grounded through a resistor, and pin 4 is connected to resistors R1 and R2, respectively, resistor R1 inputs a feedback signal and is connected to capacitor C1, the other ends of capacitor C1 and resistor R2 are grounded, a resistor R3 is also connected between pins 4 and 3 of the amplifier U1, pin 1 of the capacitive isolation chip U2 is connected to the KZVCC power supply and is grounded through capacitor C3, pin 2 is connected to the high-voltage detonation circuit through resistors R6, R8, and R7 in sequence, pin 2 is also grounded through capacitor C4, and pins 3 and 4 are grounded.

[0013] The isolation driving module includes a photoelectric isolator U3, the input end of the photoelectric isolator U3 is connected to the controller signal, and the positive electrode of the input end is respectively connected to the negative electrode of the Zener diode D2 and the positive electrode of the Zener diode D1, the negative electrode of the Zener diode D1 is connected to the resistor R10, the resistor R10 is connected to one end of the resistor R11, the negative electrode of the input end of the photoelectric isolator U3 is sequentially connected to the positive electrode of the Zener diode D2 and the other end of the resistor R11, and the two ends of the resistor R11 are respectively connected to the controller; the 3rd foot of the photoelectric isolator U3 is connected to the front-stage control voltage QJKZVCC and the resistor R12, and the 4th foot is connected to the resistor R13, the resistor R13 is sequentially connected to the resistor R14, the negative electrode of the Zener diode D4 and the gate of the thyristor MCT, the other end of the resistor R12, the other end of the resistor R14, the positive electrode of the Zener diode D4 are connected to one end of the Zener diode D3 and the capacitor C5 in parallel, and the other end of the Zener diode D3 and the capacitor C5 in parallel is grounded.

[0014] The beneficial effects of the present invention are: it can detect the frequency and duty cycle of the dynamic pulse signal in real time and output the control signal in real time through the isolated feedback voltage signal to control the pulse transformer to boost and realize the high-voltage regulated output. The two-stage static switch of the front stage is placed in the rear stage safety system, and the first and second level insurances are released after the sensitive environmental information of the rear stage, and the ground and power supply of the high-voltage conversion circuit of the front stage fuze are connected respectively; the dynamic switch is placed in the front stage high-voltage conversion module, and the third level insurance of the front stage is released by the low-voltage dynamic frequency signal transmitted by the rear stage. The signal transmission is an alternating pulse signal, with strong anti-interference ability, independent of the signal form of the logic control device, and good versatility, which can make the front stage detonation module a universal detonation module and can be applied to different weapon platforms and the detonation control design of civilian electronic detonators. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the system principle of the present invention;

[0016] Figure 2 It is a schematic diagram of the switch structure of the present invention;

[0017] Figure 3 It is a schematic diagram of the principle of the isolation sampling circuit of the present invention;

[0018] Figure 4 It is a schematic diagram of the isolation driving circuit principle of the present invention. DETAILED DESCRIPTION

[0019] The technical solution of the present invention is further described below, but the scope of protection claimed is not limited to the description.

[0020] like Figure 1As shown, a modular series all-electronic fuze includes a safety system control module, a front-stage boost detonation module, a main-stage delayed detonation module, and a DC-DC power supply. The safety system control module includes a controller, which is connected to the first-level insurance and the second-level insurance in sequence. The input end of the controller inputs the environment and distance information signal, the acceleration signal and communicates with the cable network respectively. The controller is also connected to the front-stage boost detonation module and the main-stage delayed detonation module respectively. The front-stage boost detonation module and the main-stage delayed detonation module are both provided with an isolation sampling feedback module, and the isolation sampling feedback module inputs the front-stage safety state signal and the main-stage safety state signal into the controller. The front-stage boost detonation module is also provided with a three-level insurance. The electronic safety system control module completes the insurance release in sequence according to the sensed environmental information and performs safety control on the entire electronic fuze; the front-stage boost detonation module performs high-voltage boost and detonation according to the insurance release information issued by the electronic safety system control module; the main-stage delayed detonation module issues a front-stage detonation instruction after detecting the explosion signal and completes the main-stage detonation after a certain delay. The electronic safety system control module releases the fuse in sequence by judging the launch environment information, engine environment information and long-distance.

[0021] The electronic safety system control module includes: power supply filtering and isolation power supply circuit, which filters the input power of the fuze and isolates the input and output power; safety control circuit, which is composed of two controllers of different models, mainly completing serial communication, environmental identification, insurance control and real-time control of high-voltage boost loop.

[0022] The front-stage boost detonation module completes the third-stage safety release according to the power supply and dynamic pulse signal provided by the electronic safety system control module after the safety is released. The front-stage detonation module includes: power filter and power circuit, which filters the power output of the main-stage fuze; the safety release control circuit, which detects the frequency and duty cycle of the main-stage dynamic pulse signal in real time and controls the boost and voltage stabilization of the front-stage pulse transformer in real time. Its control circuit is composed of a controller and a peripheral signal processing and identification circuit. The recognition and calculation of the pulse signal is completed by the controller, and the control signal is output in real time after signal recognition to control the front-stage boost circuit; the detonation signal processing circuit, which processes the detonation signal of the main-stage fuze and outputs the detonation signal to drive the high-voltage switch to turn on.

[0023] The main-stage delayed detonation module senses the explosion switch signal after obtaining the insurance release information of the electronic safety system control module, and outputs the front-stage detonation signal and delays the output of the main-stage detonation signal after the explosion is effective. The main-stage delayed detonation module includes: a delayed power supply, which is used to supply power to the delayed detonation module after the power supply of the front-stage detonation module is cut off after detonation, and after the main-stage power supply circuit and control circuit fail; a delay circuit, which is composed of a single-chip microcomputer and is used to output the detonation command under a high overload environment.

[0024] The primary fuse includes static switches SW1 and SW2, one end of the static switches SW1 and SW2 are respectively connected to the two poles of the release power supply, the other end of the static switch SW1 is respectively connected to the dynamic switch SD1 and one pole of the filter circuit input end, the other end of the static switch SW2 is connected to one end of the primary side of the main-stage step-up transformer and the other pole of the filter circuit input end, the other end of the dynamic switch SD1 is connected to the other end of the primary side of the main-stage step-up transformer, the secondary side of the main-stage transformer is connected to the main-stage rectifier circuit, and the output end of the filter circuit is connected to the previous-stage step-up detonation circuit.

[0025] The electronic safety system isolates high voltage from low voltage. The high voltage boost circuits of the front stage and the main stage are physically isolated by transformers, and the feedback control uses a capacitor isolation chip to sample and send to the controller for voltage stabilization control; there are no high voltage devices and high voltage signals in the safety control module, and the interactive signals between the main stage and the front stage are low voltage DC signals and dynamic pulse signals; the isolation drive uses optical isolation drive.

[0026] The fuse adopts the static switch of the front stage and the main stage, and the dynamic switch is independent of each other. Figure 2 As shown, SW1 is static switch 1, SW2 is dynamic switch 2, SD1 and SD2 are dynamic switches of the main stage and the front stage respectively. The safety components of the electronic safety system are composed of two static switches and two dynamic switches. The two dynamic switches can be driven at the same time. When the space is limited and the filter circuit cannot be placed, the two dynamic switches can be driven separately by complementary drive signals to reduce the mutual interference between the boost circuits.

[0027] The dynamic switch of the front stage is composed of power switch devices, controllers, drive circuits and signal processing circuits. The controller recognizes the dynamic pulse signal sent by the main stage in real time and outputs the control signal of the control pulse transformer in real time. This control method does not transmit AC alternating signals, high-frequency pulse signals and high-current pulse signals in the front main stage, which can effectively reduce the high-frequency voltage crosstalk caused by the interconnection between the front stage and the main circuit.

[0028] The controller delay is used to realize the online binding delay time of serial communication. The electronic safety control system module and the missile-borne control system are interconnected through RS-422, RS485, CAN and other communication interfaces, and the missile-borne control system transmits binding parameters (delay time, self-destruction time and other parameters) to the electronic safety control module. The planar transformer design of the high-voltage circuit using low-temperature co-fired ceramic (LTCC) technology makes it easy to realize the miniaturization integration of the power pulse circuit.

[0029] The dynamic switch SD1 is connected to the controller via an AND gate.

[0030] like Figure 2As shown, the front-stage boost ignition circuit includes a dynamic switch SD2, a front-stage boost transformer and a front-stage rectifier circuit. The input end of the front-stage rectifier circuit is connected to the filter circuit through the front-stage boost transformer. The dynamic switch SD2 is arranged between the front-stage boost transformer and the filter circuit. The output end of the front-stage rectifier circuit is connected to the high-voltage ignition circuit. The high-voltage ignition circuit is connected to the detonator assembly. The dynamic switch SD2 is connected to the controller through an AND gate. The safety element adopts a common static switch of the front stage and the main stage, and the dynamic switches are independent of each other. The structural diagram is shown in the attached figure. Figure 2 As shown, SW1 is static switch 1, SW2 is dynamic switch 2, SD1 and SD2 are dynamic switches of the main stage and the front stage respectively. The safety components of the electronic safety system are composed of two static switches and two dynamic switches. The two dynamic switches can be driven at the same time. When the space is limited and the filter circuit cannot be placed, the two dynamic switches can be driven separately by complementary drive signals to reduce the mutual interference between the boost circuits.

[0031] The main-stage delayed detonation module includes a delay controller, the input end of the delay controller is connected to the controller, the delay controller is connected to the isolation drive module, the high-voltage detonation circuit, and the detonator assembly in turn, and the high-voltage detonation circuit is connected to the main-stage rectifier circuit. The delay controller is also connected to the signal recognition and interface circuit. The main-stage delayed detonation module is mainly used for reliable operation in the detonation environment after the previous stage detonation and the high overload impact environment. At this time, the high-voltage boost circuit and the safety control circuit have lost their function, and the actual working conditions do not require them to work again. Therefore, the delayed detonation module only combines the energy storage delay circuit, the delay control circuit, the drive circuit, and the high-voltage detonation circuit into a modular design, and places the high-voltage boost transformer and the rectifier circuit outside the delayed detonation module for separate layout. This design can realize the miniaturized integrated design of the delay component and improve the working reliability of the delayed detonation component under high impact overload environment.

[0032] The isolated sampling feedback module includes a capacitive isolation chip U2, wherein pin 8 of the capacitive isolation chip U2 is connected to the VCC3V3 power supply, pin 7 and pin 6 are connected to the positive and negative input terminals of the amplifier U1 through resistors R4 and R5, respectively, and pin 5 of the capacitive isolation chip U2 is grounded to pin 2 of the amplifier U1; pin 5 of the amplifier U1 is connected to the VCC3V3 power supply and is grounded through capacitor C2, pin 1 is grounded through a resistor, and pin 4 is connected to resistors R1 and R2, respectively, resistor R1 inputs a feedback signal and is connected to capacitor C1, the other ends of capacitor C1 and resistor R2 are grounded, a resistor R3 is also connected between pins 4 and 3 of the amplifier U1, pin 1 of the capacitive isolation chip U2 is connected to the KZVCC power supply and is grounded through capacitor C3, pin 2 is connected to the high-voltage detonation circuit through resistors R6, R8, and R7 in sequence, pin 2 is also grounded through capacitor C4, and pins 3 and 4 are grounded. The isolation between high voltage and low voltage is isolated by low temperature co-fired ceramic (LTCC) magnetic isolation transformer. The isolation feedback control uses a 5000V isolation voltage capacitor isolation chip for isolation voltage sampling. After isolation, the operational amplifier is used to convert the differential voltage into a single-ended voltage and then sent to the control for ADC sampling. The isolation sampling circuit is shown in the attached figure. Figure 3 shown.

[0033] The isolation driving module includes a photoelectric isolator U3, the input end of the photoelectric isolator U3 is connected to the controller signal, and the positive electrode of the input end is respectively connected to the negative electrode of the Zener diode D2 and the positive electrode of the Zener diode D1, the negative electrode of the Zener diode D1 is connected to the resistor R10, the resistor R10 is connected to one end of the resistor R11, the negative electrode of the input end of the photoelectric isolator U3 is sequentially connected to the positive electrode of the Zener diode D2 and the other end of the resistor R11, and the two ends of the resistor R11 are respectively connected to the controller; the 3rd foot of the photoelectric isolator U3 is connected to the front-stage control voltage QJKZVCC and the resistor R12, and the 4th foot is connected to the resistor R13, the resistor R13 is sequentially connected to the resistor R14, the negative electrode of the Zener diode D4 and the gate of the thyristor MCT, the other end of the resistor R12, the other end of the resistor R14, the positive electrode of the Zener diode D4 are connected to one end of the Zener diode D3 and the capacitor C5 in parallel, and the other end of the Zener diode D3 and the capacitor C5 in parallel is grounded. The MCT driver of the front-stage boost detonation module adopts the optical isolation driver mode. The driver mode is as follows: Figure 4 As shown. Considering the design of anti-interference and isolated drive, the gate return potential of MCT is raised relative to the power supply ground. When the driver is not turned on, the gate return potential is kept at a negative voltage through the internal circuit of the driver; the main stage does not set a negative voltage to turn off considering the delay time, which is a normal driving mode. The input end of the isolated drive chip is controlled to be turned on at >4mA, and a voltage regulator is used to raise the optical isolation device to raise the turn-on voltage threshold.

Claims

1. A modular series all-electronic fuze, characterized in that: It includes a safety system control module, a front-stage boost initiation module, a main-stage delayed initiation module, and a DC-DC power supply. The safety system control module includes a controller, which is connected to the first-level fuse and the second-level fuse in sequence. The input end of the controller inputs environment and distance information signals and acceleration signals respectively and communicates with the cable network. The controller is also connected to the front-stage boost initiation module and the main-stage delayed initiation module respectively. The front-stage boost initiation module and the main-stage delayed initiation module are both provided with isolation sampling feedback modules. The isolation sampling feedback module inputs the front-stage safety status signal and the main-stage safety status signal into the controller. The front-stage boost initiation module is also provided with a third-level fuse.

2. The modular serial all-electronic fuze according to claim 1, characterized in that: The primary fuse includes static switches SW1 and SW2, one end of the static switches SW1 and SW2 are respectively connected to the two poles of the release power supply, the other end of the static switch SW1 is respectively connected to the dynamic switch SD1 and one pole of the filter circuit input end, the other end of the static switch SW2 is connected to one end of the primary side of the main-stage step-up transformer and the other pole of the filter circuit input end, the other end of the dynamic switch SD1 is connected to the other end of the primary side of the main-stage step-up transformer, the secondary side of the main-stage transformer is connected to the main-stage rectifier circuit, and the output end of the filter circuit is connected to the previous-stage step-up detonation circuit.

3. The modular serial all-electronic fuze according to claim 1, characterized in that: The dynamic switch SD1 is connected to the controller via an AND gate.

4. The modular serial all-electronic fuze according to claim 1, characterized in that: The front-stage boost ignition circuit includes a dynamic switch SD2, a front-stage boost transformer and a front-stage rectifier circuit. The input end of the front-stage rectifier circuit is connected to the filter circuit through the front-stage boost transformer. The dynamic switch SD2 is arranged between the front-stage boost transformer and the filter circuit. The output end of the front-stage rectifier circuit is connected to the high-voltage ignition circuit. The high-voltage ignition circuit is connected to the detonator assembly. The dynamic switch SD2 is connected to the controller through an AND gate.

5. The modular serial all-electronic fuze according to claim 1, characterized in that: The main-stage delayed detonation module includes a delay controller, the input end of the delay controller is connected to the controller, the delay controller is connected to the isolation drive module, the high-voltage detonation circuit, and the detonator assembly in sequence, and the high-voltage detonation circuit is connected to the main-stage rectifier circuit.

6. The modular serial all-electronic fuze according to claim 5, characterized in that: The delay controller is also connected to the signal identification and interface circuit.

7. The modular serial all-electronic fuze according to claim 1, characterized in that: The isolated sampling feedback module includes a capacitive isolation chip U2, wherein pin 8 of the capacitive isolation chip U2 is connected to the VCC3V3 power supply, pin 7 and pin 6 are connected to the positive and negative input terminals of the amplifier U1 through resistors R4 and R5, respectively, and pin 5 of the capacitive isolation chip U2 is grounded to pin 2 of the amplifier U1; pin 5 of the amplifier U1 is connected to the VCC3V3 power supply and is grounded through capacitor C2, pin 1 is grounded through a resistor, and pin 4 is connected to resistors R1 and R2, respectively, resistor R1 inputs a feedback signal and is connected to capacitor C1, the other ends of capacitor C1 and resistor R2 are grounded, a resistor R3 is also connected between pins 4 and 3 of the amplifier U1, pin 1 of the capacitive isolation chip U2 is connected to the KZVCC power supply and is grounded through capacitor C3, pin 2 is connected to the high-voltage detonation circuit through resistors R6, R8, and R7 in sequence, pin 2 is also grounded through capacitor C4, and pins 3 and 4 are grounded.

8. The modular serial all-electronic fuze according to claim 5, characterized in that: The isolation driving module includes a photoelectric isolator U3, the input end of the photoelectric isolator U3 is connected to the controller signal, and the positive electrode of the input end is respectively connected to the negative electrode of the Zener diode D2 and the positive electrode of the Zener diode D1, the negative electrode of the Zener diode D1 is connected to the resistor R10, the resistor R10 is connected to one end of the resistor R11, the negative electrode of the input end of the photoelectric isolator U3 is sequentially connected to the positive electrode of the Zener diode D2 and the other end of the resistor R11, and the two ends of the resistor R11 are respectively connected to the controller; the 3rd foot of the photoelectric isolator U3 is connected to the front-stage control voltage QJKZVCC and the resistor R12, and the 4th foot is connected to the resistor R13, the resistor R13 is sequentially connected to the resistor R14, the negative electrode of the Zener diode D4 and the gate of the thyristor MCT, the other end of the resistor R12, the other end of the resistor R14, the positive electrode of the Zener diode D4 are connected to one end of the Zener diode D3 and the capacitor C5 in parallel, and the other end of the Zener diode D3 and the capacitor C5 in parallel is grounded.

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