A power-saving and self-failure circuit and fuze control system

Abstract

The present invention discloses a power-saving and self-failure circuit and a fuze control system in the technical field of control circuits. The power-saving and self-failure circuit comprises: an electronic switch, a power-saving signal control circuit and a security mechanism; a battery is connected to an internal power source VCC through an electronic switch, and the internal power source VCC supplies power to the power-saving signal control circuit and the security mechanism; the electronic switch is turned on after receiving a power-on signal Set+ output by an external signal source, and maintains a conducting state under the control of a high-level power-saving signal Holding output by a power-saving signal control circuit; the security mechanism is connected to the power-saving signal control circuit, and when the security mechanism does not release the insurance within a set time, the power-saving signal Holding output by the power-saving signal control circuit becomes a low level, so that the electronic switch cannot maintain a conducting state. The present invention improves the reliability and safety of the power-saving and self-failure circuit.

Description

Technical Field

[0001] The invention belongs to the technical field of control circuits, and in particular relates to a power-saving and self-failure circuit and a fuze control system. Background Art

[0002] Power-saving and self-failure circuits are often used in fuze control systems. For safety reasons, when not working, the internal power supply of the bullet fuze circuit is disconnected from the battery and reconnected when needed, which requires a power-saving circuit. Since the bullet fuze is required to have a self-failure function, that is, after powering on and setting, if the security mechanism does not release the insurance within a certain period of time, the fuze circuit will automatically control the power off, the bullet fuze loses power supply and cannot explode, so as to ensure that personnel are not accidentally injured when troubleshooting, so it is necessary to design a highly reliable self-failure circuit. Summary of the invention

[0003] In order to solve the deficiencies in the prior art, the present invention provides a power-saving and self-failure circuit and a fuze control system, which improve the reliability and safety of the power-saving and self-failure circuit.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] In a first aspect, a power preservation and self-failure circuit is provided, comprising: an electronic switch, a power preservation signal control circuit and a security mechanism; a battery is connected to an internal power supply VCC through the electronic switch, and the internal power supply VCC supplies power to the power preservation signal control circuit and the security mechanism; the electronic switch is turned on after receiving a power-on signal Set+ output by an external signal source, and maintains a conducting state under the control of a high-level power preservation signal Holding output by the power preservation signal control circuit; the security mechanism is connected to the power preservation signal control circuit, and when the security mechanism does not release the insurance within a set time, the power preservation signal Holding output by the power preservation signal control circuit becomes a low level, thereby preventing the electronic switch from maintaining a conducting state.

[0006] Furthermore, the electronic switch includes: the collector of the transistor V2 is connected to the holding signal Holding output by the holding signal control circuit through the resistor R11, the emitter of the transistor V2 is connected to the cathode of the voltage-stabilizing diode D3 through the resistor R10, and the base of the transistor V2 is grounded; one end of the inductor L1 is connected to the anode of the voltage-stabilizing diode D3 through the resistor R8, and the other end of the inductor L1 is connected to the power-on signal Set+ output by the external signal source; the anode of the voltage-stabilizing diode D3 is connected to the anode of the diode D5 through the resistor R12, and the cathode of the diode D5 is connected to the base of the transistor V3 through the resistor R13; the cathode of the diode D5 is connected to the common end of the resistor R13 The cathode of diode D4 and the anode of diode D4 are connected to the collector of transistor V2; one end of capacitor C6 is connected to the common end of the cathode of diode D5 and resistor R13, and the other end is connected to the base of transistor V3 through resistor R14; the emitter of transistor V3 is connected to the common end of capacitor C6 and resistor R14; the collector of transistor V3 is connected to the base of transistor V4 through resistor R15, the base of transistor V4 is connected to the emitter of transistor V4 through resistor R16, and the emitter of transistor V4 is connected to the positive electrode of the battery; the collector of transistor V4 is connected to the positive electrode of voltage stabilizing diode D3 through resistor R17, and the collector of transistor V4 is connected to the internal power supply VCC.

[0007] Furthermore, the anode of the voltage zener diode D3 is connected to one end of the resistor R9 and one end of the capacitor C5, and the other end of the resistor R9 and the other end of the capacitor C5 are grounded.

[0008] Further, the power-keeping signal control circuit includes a single-chip microcomputer, the control signal H1 output by the single-chip microcomputer is connected to one end of the resistor R1, the other end of the resistor R1 is connected to one end of the resistor R2 and the positive electrode of the diode D1, the other end of the resistor R2 is grounded, and the negative electrode of the diode D1 is connected to the power-keeping signal output end; the control signal H2 output by the single-chip microcomputer is connected to one end of the resistor R3, the other end of the resistor R3 is respectively connected to one end of the resistor R4 and the base of the transistor V1, the other end of the resistor R4 is connected to the internal power supply VCC, the collector of the transistor V1 is connected to the internal power supply VCC through the resistor R5, the collector of the transistor V1 is also connected to the positive electrode of the diode D2, and the negative electrode of the diode D2 is connected to the power-keeping signal output end; the emitter of the transistor V1 is grounded and connected to the power-keeping signal output end through the resistor R6; the power-keeping signal Holding output by the power-keeping signal output end is connected to the electronic switch.

[0009] Furthermore, the Vdd pin of the single-chip microcomputer is connected to the internal power supply VCC, one end of the capacitor C1 and one end of the capacitor C2; the other end of the capacitor C1 and the other end of the capacitor C2 are grounded; the VCC pin of the active crystal oscillator XT1 is connected to the internal power supply VCC, the OUT pin of the active crystal oscillator XT1 is connected to the GP5 / CLKIN pin of the single-chip microcomputer and one end of the capacitor C3, and the other end of the capacitor C3 is grounded.

[0010] Furthermore, the security mechanism includes a safety switch K1, one end of the safety switch K1 is connected to the internal power supply VCC, and the other end is connected to the GP4 pin of the single-chip microcomputer; the GP4 pin of the single-chip microcomputer is grounded through a resistor R7.

[0011] Furthermore, the model of the single chip microcomputer is PIC12F629.

[0012] In a second aspect, a fuze control system is provided, wherein the fuze control system is equipped with the power preservation and self-failure circuit described in the first aspect.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] (1) The present invention provides an electronic switch, a power-saving signal control circuit and a safety mechanism. The electronic switch is turned on after receiving a power-on signal output by an external signal source, and maintains the on state under the control of a high-level power-saving signal output by the power-saving signal control circuit. When the safety mechanism fails to release the insurance within a set time, the power-saving signal output by the power-saving signal control circuit becomes a low level, so that the electronic switch cannot maintain the on state, thereby improving the reliability and safety of the power-saving and self-failure circuits.

[0015] (2) The present invention improves the reliability to 75% and improves the safety of the fuze by configuring the power-saving signal control circuit as a power-saving logic circuit with two control terminals. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a circuit structure diagram of a power preservation and self-failure circuit provided by an embodiment of the present invention;

[0017] Figure 2 yes Figure 1 Schematic diagram of the circuit structure of the electronic switch;

[0018] Figure 3 yes Figure 1 Schematic diagram of the interface circuit of the microcontroller. DETAILED DESCRIPTION

[0019] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0020] Embodiment 1

[0021] like Figure 1~Figure 3As shown, a power preservation and self-failure circuit includes: an electronic switch, a power preservation signal control circuit and a security mechanism; a battery is connected to an internal power supply VCC through the electronic switch, and the internal power supply VCC supplies power to the power preservation signal control circuit and the security mechanism; the electronic switch is turned on after receiving a power-on signal Set+ output by an external signal source, and maintains a conducting state under the control of a high-level power preservation signal Holding output by the power preservation signal control circuit; the security mechanism is connected to the power preservation signal control circuit, and when the security mechanism does not release the insurance within a set time, the power preservation signal Holding output by the power preservation signal control circuit becomes a low level, so that the electronic switch cannot maintain a conducting state.

[0022] like Figure 2 As shown, the electronic switch includes transistors V2, V3, V4, a voltage-stabilizing diode D3, and diodes D4 and D5. The collector of transistor V2 is connected to the power-holding signal Holding output by the power-holding signal control circuit through a resistor R11, the emitter of transistor V2 is connected to the cathode of voltage-stabilizing diode D3 through a resistor R10, and the base of transistor V2 is grounded; one end of inductor L1 is connected to the anode of voltage-stabilizing diode D3 through a resistor R8, and the other end of inductor L1 is connected to the power-on signal Set+ output by an external signal source; the anode of voltage-stabilizing diode D3 is connected to the anode of diode D5 through a resistor R12, and the cathode of diode D5 is connected to the base of transistor V3 through a resistor R13; the cathode of diode D5 and the common end of resistor R13 are connected to the cathode of diode D4. The positive electrode of the diode D4 is connected to the collector of the transistor V2; one end of the capacitor C6 is connected to the cathode of the diode D5 and the common end of the resistor R13, and the other end is connected to the base of the transistor V3 through the resistor R14; the emitter of the transistor V3 is connected to the common end of the capacitor C6 and the resistor R14; the collector of the transistor V3 is connected to the base of the transistor V4 through the resistor R15, the base of the transistor V4 is connected to the emitter of the transistor V4 through the resistor R16, and the emitter of the transistor V4 is connected to the positive electrode of the battery; the collector of the transistor V4 is connected to the positive electrode of the voltage stabilizing diode D3 through the resistor R17, and the collector of the transistor V4 is connected to the internal power supply VCC.

[0023] The anode of the voltage zener diode D3 is connected to one end of the resistor R9 and one end of the capacitor C5, and the other end of the resistor R9 and the other end of the capacitor C5 are grounded.

[0024] When the electronic switch receives the power-on signal Set+ output by the external signal source, the Set+ terminal is at a high level, the diode D5 is turned on, the base of the transistor V3 is at a high level, the transistor V3 is turned on, and its collector is pulled low, so that the base of the transistor V4 is at a low level, the transistor V4 is turned on, and the internal power supply VCC is connected to the battery Vbat.

[0025] When the holding signal Holding output by the holding signal control circuit is at a high level, the diode D4 is turned on, and the electronic switch can be kept in the on state when there is no external setter.

[0026] like Figure 1 , Figure 3 As shown, the power-keeping signal control circuit includes a single-chip microcomputer, and the control signal H1 output by the single-chip microcomputer is connected to one end of the resistor R1, the other end of the resistor R1 is connected to one end of the resistor R2 and the positive electrode of the diode D1, the other end of the resistor R2 is grounded, and the negative electrode of the diode D1 is connected to the power-keeping signal output end; the control signal H2 output by the single-chip microcomputer is connected to one end of the resistor R3, the other end of the resistor R3 is respectively connected to one end of the resistor R4 and the base of the transistor V1, the other end of the resistor R4 is connected to the internal power supply VCC, the collector of the transistor V1 is connected to the internal power supply VCC through the resistor R5, the collector of the transistor V1 is also connected to the positive electrode of the diode D2, and the negative electrode of the diode D2 is connected to the power-keeping signal output end; the emitter of the transistor V1 is grounded and connected to the power-keeping signal output end through the resistor R6; the power-keeping signal Holding output by the power-keeping signal output end is connected to the electronic switch.

[0027] The Vdd pin of the microcontroller is connected to the internal power supply VCC, one end of the capacitor C1 and one end of the capacitor C2; the other end of the capacitor C1 and the other end of the capacitor C2 are grounded; the VCC pin of the active crystal oscillator XT1 is connected to the internal power supply VCC, the OUT pin of the active crystal oscillator XT1 is connected to the GP5 / CLKIN pin of the microcontroller and one end of the capacitor C3, and the other end of the capacitor C3 is grounded. After power is applied, the active crystal oscillator XT1 outputs an oscillation signal, and the microcontroller starts working. Capacitors C1, C2, and C3 are filter capacitors.

[0028] The safety mechanism includes a safety switch K1, one end of which is connected to an internal power supply VCC, and the other end is connected to a GP4 pin of the single-chip microcomputer; the GP4 pin of the single-chip microcomputer is grounded through a resistor R7.

[0029] The model of the single chip microcomputer in this embodiment is PIC12F629.

[0030] The power-on signal Set+ output by the external signal source controls the electronic switch to be turned on, so that the internal power supply VCC is connected to the battery Vbat to realize the power-on function.

[0031] After power-on, the control signal H1 output from the GP0 pin of the microcontroller and the control signal H2 output from the GP1 pin respectively generate a high-level power-holding signal Holding through the power-holding logic circuit, so that the electronic switch remains in the on state and the internal power supply is normal, thereby realizing the power-holding function.

[0032] If the security mechanism does not release the insurance within a certain period of time, that is, the insurance switch K1 is in the disconnected state and the insurance signal Start is at a low level, then the single-chip microcomputer changes the power-holding signal Holding to a low level through the control signals H1 and H2, the electronic switch cannot maintain the on state, the connection between the internal power supply and the battery is disconnected, and the single-chip microcomputer and other circuits cannot work normally, thereby realizing the self-failure function.

[0033] The present invention cannot maintain power in only one case. The signal logic relationship between the control signal H1, the control signal H2 and the power maintenance signal Holding is as follows:

[0034]

[0035] The invention improves the reliability to 75% and improves the safety of the fuze by designing the power-saving logic circuits of the two control ends.

[0036] Embodiment 2

[0037] Based on the power preservation and self-disabling circuit described in the first embodiment, this embodiment provides a fuze control system, and the fuze control system is equipped with the power preservation and self-disabling circuit described in the first embodiment.

[0038] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A power-saving and self-failure circuit, characterized in that: include: Electronic switches, power-saving signal control circuits and security mechanisms; The battery is connected to the internal power supply VCC through an electronic switch, and the internal power supply VCC supplies power to the power protection signal control circuit and the security mechanism; The electronic switch is turned on after receiving the power-on signal Set+ output by the external signal source, and maintains the on state under the control of the high-level power-holding signal Holding output by the power-holding signal control circuit; The security mechanism is connected to the power-holding signal control circuit. When the security mechanism does not release the insurance within the set time, the power-holding signal Holding output by the power-holding signal control circuit becomes a low level, so that the electronic switch cannot maintain the conducting state; Wherein, the electronic switch comprises: The collector of transistor V2 is connected to the holding signal Holding output by the holding signal control circuit through resistor R11, the emitter of transistor V2 is connected to the cathode of voltage stabilizing diode D3 through resistor R10, and the base of transistor V2 is grounded; One end of the inductor L1 is connected to the positive electrode of the voltage-stabilizing diode D3 through the resistor R8, and the other end of the inductor L1 is connected to the power-on signal Set+ output by the external signal source; the positive electrode of the voltage-stabilizing diode D3 is connected to the positive electrode of the diode D5 through the resistor R12, and the negative electrode of the diode D5 is connected to the base of the transistor V3 through the resistor R13; the common end of the negative electrode of the diode D5 and the resistor R13 is connected to the negative electrode of the diode D4, and the positive electrode of the diode D4 is connected to the collector of the transistor V2; one end of the capacitor C6 is connected to the negative electrode of the diode D5 and the common end of the resistor R13, and the other end is connected to the base of the transistor V3 through the resistor R14; the emitter of the transistor V3 is connected to the common end of the capacitor C6 and the resistor R14; The collector of transistor V3 is connected to the base of transistor V4 through resistor R15, the base of transistor V4 is connected to the emitter of transistor V4 through resistor R16, and the emitter of transistor V4 is connected to the positive electrode of the battery; the collector of transistor V4 is connected to the positive electrode of voltage zener diode D3 through resistor R17, and the collector of transistor V4 is connected to the internal power supply VCC; The power-saving signal control circuit includes a single-chip microcomputer, The control signal H1 output by the single chip microcomputer is connected to one end of the resistor R1, the other end of the resistor R1 is connected to one end of the resistor R2 and the positive electrode of the diode D1, the other end of the resistor R2 is grounded, and the negative electrode of the diode D1 is connected to the power-saving signal output end; The control signal H2 output by the single chip microcomputer is connected to one end of the resistor R3, the other end of the resistor R3 is respectively connected to one end of the resistor R4 and the base of the transistor V1, the other end of the resistor R4 is connected to the internal power supply VCC, the collector of the transistor V1 is connected to the internal power supply VCC through the resistor R5, the collector of the transistor V1 is also connected to the positive electrode of the diode D2, and the negative electrode of the diode D2 is connected to the power-keeping signal output end; the emitter of the transistor V1 is grounded and connected to the power-keeping signal output end through the resistor R6; The power-holding signal Holding outputted from the power-holding signal output terminal is connected to the electronic switch; The safety mechanism comprises a safety switch K1, one end of which is connected to an internal power supply VCC, and the other end is connected to a GP4 pin of a single-chip microcomputer; the GP4 pin of the single-chip microcomputer is grounded via a resistor R7.

2. The power preservation and self-failure circuit according to claim 1, characterized in that: The anode of the voltage zener diode D3 is connected to one end of the resistor R9 and one end of the capacitor C5, and the other end of the resistor R9 and the other end of the capacitor C5 are grounded.

3. The power preservation and self-failure circuit according to claim 1, characterized in that: The Vdd pin of the single chip microcomputer is connected to the internal power supply VCC, one end of the capacitor C1 and one end of the capacitor C2; the other end of the capacitor C1 and the other end of the capacitor C2 are grounded; The VCC pin of the active crystal oscillator XT1 is connected to the internal power supply VCC, the OUT pin of the active crystal oscillator XT1 is connected to the GP5 / CLKIN pin of the microcontroller and one end of the capacitor C3, and the other end of the capacitor C3 is grounded.

4. The power preservation and self-failure circuit according to claim 1, characterized in that: The model of the single chip microcomputer is PIC12F629.

5. A fuze control system, characterized in that: The fuze control system is equipped with the power preservation and self-failure circuit described in any one of claims 1 to 4.

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