CN-122017543-A - Initiating explosive device insurance state detection circuit

Abstract

The invention relates to the technical field of flight electronic control, in particular to a circuit for detecting the safety state of an initiating explosive device. The initiating explosive device safety state detection circuit comprises an initiating explosive device and a safety switch which are connected in parallel, and further comprises a detection control circuit and a voltage acquisition circuit, wherein the detection control circuit comprises an optical MOS relay U1 connected with the safety switch, the voltage acquisition circuit comprises an operational amplifier circuit, an analog-to-digital converter U3 and a microprocessor U4 which are sequentially connected, and the operational amplifier circuit is connected with the safety switch and can realize high-precision and high-reliability detection on the state of the MOS tube safety circuit.

Inventors

• XIA SIYUAN
• XIA JIAXING
• WANG DIWEI
• TAN ZUOHONG
• Qin Langqiu
• DU LUNDUN
• Huan Liaoyuan
• LI ZHUOLIN
• LI JUN
• Bai Xiandi

Assignees

• 重庆航天工业有限公司

Dates

Publication Date

20260512

Application Date

20251229

Claims (6)

1. 1. The initiating explosive device safety state detection circuit comprises an initiating explosive device and a safety switch which are connected in parallel, and is characterized by further comprising a detection control circuit and a voltage acquisition circuit, wherein the detection control circuit comprises an optical MOS relay U1 connected with the safety switch, the voltage acquisition circuit comprises an operational amplifier circuit, an analog-to-digital converter U3 and a microprocessor U4 which are sequentially connected, and the operational amplifier circuit is connected with the safety switch.
2. 2. The initiating explosive device safety state detection circuit according to claim 1, wherein an in+ pin of the photo-MOS relay U1 is connected with a +5v power supply, an IN-pin is used for detecting a control signal input, an out+ pin is connected with an operational amplifier circuit, an analog-to-digital converter U3 is powered, and an Out-pin is connected with a safety switch.
3. 3. The initiating explosive device safety state detection circuit according to claim 2 wherein the detection control circuit further comprises a resistor R2, the resistor R2 being connected in series on an out+ pin.
4. 4. The initiating explosive device safety state detection circuit according to claim 2 wherein the detection control circuit further comprises a resistor R1, the resistor R1 being connected IN series between an in+ pin and a +5v power supply.
5. 5. The initiating explosive device safety state detection circuit according to any one of claims 2 to 4, wherein the operational amplifier circuit comprises an operational amplifier U2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a capacitor C1, a capacitor C2, a capacitor C3 and a capacitor C4, wherein the capacitor C1 is connected in parallel with a safety switch, the resistor R4 and the resistor R7 are respectively connected to two ends of the capacitor C1, the other end of the resistor R4 is connected with the same-direction input end of the operational amplifier U2, the other end of the resistor R7 is connected with the reverse input end of the operational amplifier U2, the power positive end of the operational amplifier U2 is connected with an out+ pin of a MOS relay U1, the power negative end is grounded, one end of the resistor R3 is connected with the same-direction input end of the operational amplifier U2, the other end of the resistor C8 is connected with the output end of the MOS relay U3, the two ends of the resistor R5 are respectively connected with the reverse input end and the output end of the capacitor C2, the other end of the MOS relay U2 is connected with the other end of the MOS relay U2, and the other end of the MOS relay U2 is connected with the other end of the MOS relay U3, and the other end is grounded, and the other end of the MOS relay is connected with the other end is grounded, and the other end is connected with the MOS relay end, and the MOS relay is connected with the other end of the MOS terminal, and the MOS terminal is connected with the other end, and the MOS terminal.
6. 6. The initiating explosive device safety state detection circuit according to claim 5, wherein the safety switch is composed of two serially connected MOS tubes.

Description

Initiating explosive device insurance state detection circuit Technical Field The invention relates to the technical field of flight electronic control, in particular to a circuit for detecting the safety state of an initiating explosive device. Background The initiating explosive device is used for receiving an ignition initiation instruction to initiate so as to achieve the purpose of executing the set action. If the initiating explosive device is triggered by mistake, the aircraft can not execute actions in a preset time window, the success and failure of the flight test are affected, and even the casualties can be caused when the conditions are serious. Therefore, safety measures are required to be added to the initiating explosive device, and even if false triggering signals are added to two ends of the initiating explosive device, the safety measures can be released through the safety loop. Therefore, the flight and emission time sequence of the aircraft is strongly related to the safety state detection, and the flight and emission time sequence can continue to successfully advance only when the safety state is at a preset position, so that the accurate detection of the state of the safety loop on the aircraft is particularly important for the overall safety state of the aircraft, and whether the safety loop detection is successful or not can directly determine whether the aircraft flies or emits. The traditional initiating explosive device protection circuit is realized by adopting a relay. The relay is a mechanical switch, the state of the safety can be judged only by collecting the state of the relay contact through a simple optocoupler collecting circuit, but the relay is used as a mechanical sensitive device, and the shock resistance and vibration resistance are poor. Therefore, the MOS tube with stronger shock resistance and vibration resistance can be used for replacing a relay to realize the function of a safety switch so as to improve the overall environmental adaptability of the product, but the MOS tube safety circuit cannot acquire the state of the MOS tube through a simple optocoupler acquisition circuit. Disclosure of Invention The invention aims to provide a initiating explosive device safety state detection circuit which can realize high-precision and high-reliability detection on the state of an MOS tube safety circuit. In order to solve the technical problems, the invention provides a fire work safety state detection circuit which comprises a fire work and a safety switch connected in parallel, and further comprises a detection control circuit and a voltage acquisition circuit, wherein the detection control circuit comprises an optical MOS relay U1 connected with the safety switch, and the voltage acquisition circuit comprises an operational amplifier circuit, an analog-to-digital converter U3 and a microprocessor U4 which are sequentially connected, and the operational amplifier circuit is connected with the safety switch. Through adopting above-mentioned technical scheme, when detecting the insurance state of initiating explosive device, external power supply (can be one or more) is photo MOS relay U1, operational amplifier circuit, analog-to-digital converter U3, microprocessor U4 power supply respectively, will detect control signal input photo MOS relay U1, after detecting control current through the insurance switch, gather the voltage at insurance switch both ends by operational amplifier circuit to convert into the digital quantity through analog-to-digital converter U3, compare with the threshold voltage of presetting in the microprocessor U4, can judge the upper guarantee state of solution of insurance return circuit. Optionally, an in+ pin of the photo-MOS relay U1 is connected with a +5V power supply, an IN-pin is used for detecting control signal input, an out+ pin is connected with an operational amplifier circuit, an analog-digital converter U3 supplies power, and an Out-pin is connected with a safety switch. Optionally, the detection control circuit further includes a resistor R2, and the resistor R2 is connected in series to the out+ pin. Optionally, the detection control circuit further includes a resistor R1, and the resistor R1 is connected IN series between the in+ pin and the +5v power supply. The operational amplifier circuit comprises an operational amplifier U2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a capacitor C1, a capacitor C2, a capacitor C3 and a capacitor C4, wherein the capacitor C1 is connected with a safety switch in parallel, the resistor R4 and the resistor R7 are respectively connected at two ends of the capacitor C1, the other end of the resistor R4 is connected with the same-direction input end of the operational amplifier U2, the other end of the resistor R7 is connected with the reverse input end of the operational amplifier U2, the positive end of a power supply of the operational amplifier