WO2022028205A1 - Detonation control system and detonation method for fire extinguisher ball - Google Patents

Abstract

A detonation control system and a detonation method for a fire extinguisher ball. The system comprises an MCU control circuit, a power detection and power supply circuit, and a step-up detonation control circuit. The power detection and power supply circuit and the step-up detonation control circuit are both connected to the MCU control circuit by means of electrical signals. The power detection and power supply circuit is configured to continuously supply power to the MCU control circuit and to perform power detection therefor. The step-up detonation control circuit is configured to control charging and discharging of a capacitor so as to detonate an explosive. The circuits of the whole system can be easily controlled, thereby improving the detonation safety of fire extinguisher balls.

Description

Detonation control system and detonation method for fire-extinguishing bomb technical field

The invention relates to the technical field of fire-extinguishing bombs, in particular to a detonation control system and a detonating method for fire-extinguishing bombs.

Background technique

If a fire occurs in a high-rise building, because the floor height is too high, the height of fire-extinguishing equipment such as ladders and lift trucks is limited, and it is difficult to reach the height of the floor where the fire occurred. The unmanned aerial vehicle-mounted fire extinguishing system has strong mobility and is not affected by the fire extinguishing height and the surrounding environment, which can solve the world problem that high-rise buildings cannot quickly and effectively extinguish fire. For the unmanned aerial vehicle-mounted fire extinguishing bomb system, the detonation of the fire extinguishing bomb is usually realized by using an electronic detonator. The electronic detonator includes a foot wire, a control circuit board with a delay chip, an ignition charge and a detonator. When in use, the bus for outputting the detonation signal is connected to the foot line, and then the detonation serial signal is output, the delay chip performs a preset time delay, and then the control circuit board passes the detonation signal through the bridge. The wire is passed to the ignition head to achieve detonation control. However, in the existing detonation control system, the charging and discharging control circuit is unstable in charging and discharging, and the safety performance of the electronic detonator is low.

SUMMARY OF THE INVENTION

In view of the deficiencies in the prior art, the purpose of the present invention is to provide a detonation control system and detonation method for fire-extinguishing bombs.

In order to achieve the above object, the present invention provides the following technical solutions:

A detonation control system for fire-extinguishing bombs, comprising a MCU control circuit, a power supply detection power supply circuit, and a boost detonation control circuit, wherein the power supply detection power supply circuit and the boost detonation control circuit are all connected with the MCU control circuit by electrical signals, The power supply detection and power supply circuit is used for continuous power supply and power supply detection to the MCU control circuit, and the boost detonation control circuit is used to realize the charge and discharge control of the capacitor to detonate the explosive.

Further, it also includes a physical address identification circuit and an RS485 communication circuit, the physical address identification circuit is electrically connected to the MCU control circuit, and the physical address identification circuit is used to set the physical address of each fire extinguishing bomb, and the RS485 The communication circuit is electrically connected with the MCU control circuit, and the MCU control circuit realizes information transmission with the UAV mainboard through the RS485 communication circuit.

The MCU control circuit includes a chip U1, and the PB0 port, the PA1 port, and the PA7 port of the chip U1 are connected to the boost detonation control circuit for realizing instruction transmission between the chip U1 and the boost detonation control circuit. The PB3 to PB5 ports of the chip U1 are connected with the physical address identification circuit, and are used to realize that the chip U1 receives the address information of the physical address identification circuit. The PB6 port and the PA0-WKUP port of the chip U1 are connected to the power supply detection circuit. The connection is used to realize the signal transmission between the chip U1 and the power supply detection and power supply circuit. The PA8 to PA10 ports of the chip U1 are connected to the RS485 communication circuit to realize the information transmission between the chip U1 and the RS485 communication circuit.

The physical address identification circuit includes an interface P2, and pins 2 to 5 of the interface P2 are correspondingly connected to pins 30 to 33 of the chip U1 through an RC filter circuit, and the RC filter circuit is used to eliminate the dial switch process. interference signals generated in the .

In the present invention, preferably, the power detection and power supply circuit includes an interface P1 and a battery BT1, and the No. 6 pin of the interface P1 is connected to a chip U2 through a zener diode D4, and the chip U2 is used to connect the 12V external power supply Converted to 3.3V, the 3.3V power supply is connected to the VDD power supply through the capacitor C5, the electrolytic capacitor C6, and the Zener diode D3. The VDD power supply is used to supply power to the microcontroller, and the battery BT1 is connected to the MOS through the Zener diode D1. Tube Q1, the Zener diode D1 is connected to a transistor Q2 through a resistor R4, and the transistor Q2 is connected to the 34 pin of the chip U1 through a resistor R3 and a resistor R1.

In the present invention, preferably, the boost detonation control circuit includes a battery BT2, a chip U3 and an interface P3, the battery BT2 is connected to the No. 5 pin of the chip U3, and the No. 4 pin of the chip U3 The resistor R11 is connected to the No. 8 pin of the chip U1, and the No. 1 pin of the chip U3 is connected to the resistor R12 and the resistor R13 through the capacitor C8 and the zener diode D7, and the zener diode D7 is connected to the ground in parallel. The two electrolytic capacitors C9 are grounded, and the capacitor C10 is grounded. The capacitor C10 is connected to the No. 2 pin of the interface P3. The No. 1 pin of the interface P3 is connected to a MOS tube Q3 through a resistor R16. The MOS tube Q3 It is connected to pin 15 of the chip U1 through the resistor R14.

The RS485 communication circuit includes a chip U4, the pins 6 and 7 of the chip U4 are paired with the pins 3 and 4 of the interface P1, and the pins 1, 3, and 4 of the chip U4 are connected with each other. The pins 22, 20 and 21 of the chip U1 are connected correspondingly, and the pin 2 of the chip U4 is grounded through the resistor R35.

In the present invention, preferably, the No. 1 and No. 2 pins of the interface P1 are correspondingly connected with a connecting switch KEY-A and a connecting switch KEY-B, and the connecting switch KEY-A is connected to the No. 13 pin of the chip U1 through the resistor R31 The pins are connected, and the connection switch KEY-B is connected to the VDD power supply.

A passive crystal oscillator Y1 is connected to the No. 2 pin of the chip U1, and the passive crystal oscillator Y1 is used to provide a stable clock signal to the chip U1.

A detonation method for fire-extinguishing bombs, characterized in that,

The first step, the system is powered on, the physical address of the MCU control circuit is set by the physical address identification circuit, and the electrolytic capacitor C9 in the boost detonation control circuit begins to charge;

In the second step, the MCU control circuit sends a delay instruction, the fire extinguishing bomb starts to be bound and enters the countdown preparation stage, and the state of the fire extinguishing bomb is detected by the power supply detection power supply circuit and transmitted to the MCU control circuit;

In the third step, after the binding is completed, the detection data obtained by the MCU control circuit is normal, and then an explosion instruction is issued. At this time, the fire extinguishing bomb has the detonation function. If there is an abnormality, go to step 6;

The fourth step, after the fire extinguishing bomb is detached, the MCU control circuit detects that the 12V external power supply, the connection switch KEY-A, and the connection switch KEY-B are disconnected together, and the fire extinguishing bomb starts to count down;

In the fifth step, after the start delay of the fire extinguishing bomb, the MCU control circuit controls the electrolytic capacitor C9 in the boost detonation control circuit to start discharging, converts the electrical energy into heat energy, and makes the heating bridge wire detonate the explosive to realize the detonation of the fire extinguishing bomb. ;

In the sixth step, if the detonation is completed or the detection data of the MCU control circuit is abnormal, the MCU control circuit resets the single-chip microcomputer, and each circuit returns to the initial state.

Compared with the prior art, the beneficial effects of the present invention are:

(1) The present invention detects whether the power supply of the MCU control circuit is normal by setting a power supply detection power supply circuit, and adopts two switching methods of external power supply and battery BT1 to continuously supply power to the MCU control circuit to ensure the stability of the MCU control circuit operation. . At the same time, the detonation of the electronic detonator is realized by setting a boost detonation control circuit, and the electrolytic capacitor C9 is continuously charged and stored by two switching methods of external power supply and battery BT2, so that the energy storage process is stable and controllable. The discharge control of the electrolytic capacitor is realized through the cooperation of the MOS tube Q3 and the MCU control circuit, so that the circuit responds quickly, and the reliability and safety of the detonation process of the fire extinguishing bomb are improved. The circuit control method of the whole system is simple, and the fire extinguishing bomb has high safety performance.

(2) By setting up the RS485 communication circuit, the communication between the UAV main board and the MCU control circuit is realized, and the CRC check data is added to the MCU control circuit to ensure the stability of the data transmission between the RS485 communication circuit and the MCU control circuit.

Description of drawings

The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the specification, and are used to explain the present invention together with the embodiments of the present invention, and do not constitute a limitation to the present invention. In the attached image:

Fig. 1 is the overall structure block diagram of the present invention;

Fig. 2 is the overall circuit diagram of the present invention;

Fig. 3 is the circuit diagram of MCU control circuit and physical address identification circuit of the present invention;

Fig. 4 is the circuit diagram of the power supply detection power supply circuit of the present invention;

Fig. 5 is the circuit diagram of the boost detonation control circuit of the present invention;

FIG. 6 is a circuit diagram of the RS485 communication circuit of the present invention.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

It should be noted that when a component is referred to as being "fixed to" another component, it can be directly on the other component or there may also be a centered component. When a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a co-existence of an intervening component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a co-existing centered component. The terms "vertical," "horizontal," "left," "right," and similar expressions are used herein for illustrative purposes only.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to FIGS. 1 to 6 at the same time, a preferred embodiment of the present invention provides a detonation control system and detonation method for fire-extinguishing bombs, including an MCU control circuit, a power supply detection circuit, and a boost detonation control circuit. The detection power supply circuit and the boost detonation control circuit are all connected with the electrical signal of the MCU control circuit. The power supply detection power supply circuit is used for continuous power supply and power detection to the MCU control circuit, and the boost detonation control circuit is used to realize the capacitance charge and discharge control to detonate explosives.

Specifically, the present invention detects whether the power supply of the MCU control circuit is normal by setting a power supply detection power supply circuit, and adopts two switching modes of external power supply and battery BT1 to continuously supply power to the MCU control circuit, so as to ensure the stability of the MCU control circuit operation. . At the same time, the detonation of the electronic detonator is realized by setting a boost detonation control circuit, and the electrolytic capacitor C9 is continuously charged and stored by two switching methods of external power supply and battery BT2, so that the energy storage process is stable and controllable. The discharge control of the electrolytic capacitor is realized through the cooperation of the MOS tube Q3 and the MCU control circuit, which makes the circuit respond quickly and improves the reliability and safety of the detonation process of the fire extinguishing bomb.

Further, in this embodiment, a physical address identification circuit and an RS485 communication circuit are also included, the physical address identification circuit is electrically connected to the MCU control circuit, and the physical address identification circuit is used to set the physical characteristics of each section of the fire extinguishing bomb. address, the RS485 communication circuit is electrically connected to the MCU control circuit, and the RS485 communication circuit is used to realize the information transmission between the UAV motherboard and the MCU control circuit.

Specifically, in the present invention, the physical address identification circuit uses a DIP switch to set the physical address of the MCU control circuit, and the internal program of the MCU control circuit identifies whether each pin is grounded to detect whether the state of each fire extinguishing bomb is normal. . Through the RS458 communication circuit, the communication between the UAV main control board and the MCU control circuit is realized, and the CRC check data is added to the internal program in the MCU control circuit to ensure the stability of the data transmission between the RS485 communication circuit and the MCU control circuit.

In this implementation, as shown in FIG. 3 , the MCU control circuit includes a chip U1, the model of the chip U1 is STM32F103T8U6, and the PB0 port, PA1 port, and PA7 port of the chip U1 are connected to the boost detonation control circuit, For realizing the instruction transmission between the chip U1 and the boosting detonation control circuit, the PB3 to PB5 ports of the chip U1 are connected to the physical address identification circuit, so as to realize that the chip U1 receives the address information of the physical address identification circuit, so The PB6 port and the PA0-WKUP port of the chip U1 are connected to the power supply detection power supply circuit for realizing signal transmission between the chip U1 and the power supply detection power supply circuit, and the PA8 to PA10 ports of the chip U1 are connected to the RS485 communication circuit. It is used to realize the information transmission between the chip U1 and the RS485 communication circuit.

Further, an indicator LED1 is connected to the PB2 port of the chip U1, and the indicator LED1 is used for running indication of the chip U1. The No. 2 pin of the chip U1 is connected with a passive crystal oscillator Y1, and the passive crystal oscillator Y1 is used to provide a stable clock signal to the chip U1 to realize accurate timing. The No. 4 pin of the chip U1 is connected to the VDD power supply through the resistor R27, and the No. 4 pin of the chip U1 is the reset pin. When the chip U1 detects a fault or after the detonation work is completed, the chip U1 controls the VDD power supply to disconnect, so that each The microcontroller restores its initial state. Pins 25 and 28 of the chip U1 are connected with an interface P5, and the interface P5 is used to connect to the data transmission interface of the computer, and is used to download programs to satisfy the software control of the entire control system.

The physical address identification circuit includes an interface P2, the interface P2 is used to connect the DIP switch, the No. 1 pin of the interface P2 is connected to the VDD power supply, and the No. 2 pin of the interface P2 passes through the resistor R22, the capacitor C16 and the 30 pin of the chip U1. Connection, No. 3 of interface P2 is connected to No. 31 pin of chip U1 through resistor R21 and capacitor C15, No. 4 of interface P2 is connected to No. 32 pin of chip U1 through resistor R20 and capacitor C14, No. 5 of interface P2 passes through Resistor R19 and capacitor C13 are connected to pin 33 of chip U1. Resistor R22, capacitor C16, resistor R21, capacitor C15, resistor R20, capacitor C14, resistor R19, and capacitor C13 form an RC filter circuit. The RC filter circuit is used for Eliminate the interference signal generated in the process of dialing the switch.

As shown in FIG. 4 , the power detection and power supply circuit includes an interface P1 and a battery BT1, the interface P1 is used to connect external equipment, and pins 1 and 2 of the interface P1 are correspondingly connected with a connection switch KEY-A and a connection switch KEY -B, the connection switch KEY-A is connected to pin 13 of the chip U1 through the resistor R31, the connection switch KEY-B is connected to the VDD power supply, the connection switch KEY-A and the connection switch KEY-B are used for Provide a timing signal, and the No. 3 and No. 4 pins of the interface P1 are connected to the RS485 communication circuit. The No. 6 pin of the interface P1 is connected to the chip U2 through the zener diode D4. The chip U2 is used to convert the 12V external power supply to 3.3V. The 3.3V power supply passes through the capacitor C5, the electrolytic capacitor C6, and the voltage regulator. The diode D3 is connected to the VDD power supply, which is used to supply power to the microcontroller, the battery BT1 is connected to the MOS transistor Q1 through the zener diode D1, the zener diode D1 is connected to the transistor Q2 through the resistor R4, and the transistor Q2 is connected to pin 34 of the chip U1 through resistor R3 and resistor R1. Specifically, when the externally provided 12V power supply is supplied, the voltage is stabilized by the chip U2 to form a 3.3V DC voltage, which supplies power to the chip U1, and the 12V voltage is divided by the resistors R6 and R7 to obtain a POWER-12V voltage signal and transmit it to the chip Pin 7 of U1 to detect 12V power supply. After the chip U1 is started, the C_BAT signal of pin 34 of the chip U1 outputs a high level of 3.3V. At this time, the transistor Q2 works in the saturation region, the MOS transistor Q1 is turned on, and the battery BT1 outputs a 3V voltage. At this time, the voltage output by the battery BT1 The voltage output by the chip U2 is less than 3.3V, and the power supply of the chip U1 is provided by the chip U2. After the fire extinguishing bomb is detached, the 12V external power supply is disconnected, the connection switches KEY-A and KEY-B are disconnected, and the power supply of the chip U1 is provided by the battery BT1, which ensures the stability of the operation of the chip U1.

In this embodiment, as shown in FIG. 5 , the boost detonation control circuit includes a battery BT2, a chip U3 and an interface P3, the battery BT2 is connected to the pin 5 of the chip U3, and the The No. 4 pin is connected to the No. 8 pin of the chip U1 through the resistor R11. The chip U3 is a booster chip with a model of SDB628. The No. 1 pin of the chip U3 is connected to a resistor through a capacitor C8 and a Zener diode D7. R12 and resistor R13 are grounded, and the Zener diode D7 is connected in parallel with two electrolytic capacitors C9 to ground and capacitor C10 to ground. The capacitor C10 is connected to the No. 2 pin of the interface P3, which is used to connect the heating bridge wire In order to detonate the explosive, the No. 1 pin of the interface P3 is connected to the MOS tube Q3 through the resistor R16, and the MOS tube Q3 is connected to the No. 15 pin of the chip U1 through the resistor R14. The 12V power supply is connected to the electrolytic capacitor C9 through the Zener diode D5. Specifically, when the 12V power supply starts, the 12V power supply starts to charge the C9 electrolytic capacitor. After the chip U1 starts to work, the 16V_EN signal output by the No. 8 pin of U1 is a high level, and the voltage of the battery BT2 is boosted by the chip U3. After boosting, the output voltage is about 12V. When the 12V power supply is cut off, the electrolytic capacitor C9 is continuously powered by the battery BT2. When the delay is over, the U1-PIN34 signal output by pin 15 of the chip U1 is at a high level, which makes the MOS tube Q3 conduct, the electrolytic capacitor C9 discharges, and the electric energy is converted into heat energy, so that the heating bridge wire reaches the detonation point and detonates. explosive.

As shown in FIG. 6 , the RS485 communication circuit includes a chip U4, the pins 6 and 7 of the chip U4 are connected to the pins 3 and 4 of the interface P1 correspondingly, and the pins 3 and 4 of the P1 are used for In order to connect the main board of the drone to realize the communication between the RS485 communication circuit and the main control board of the drone, the pins 1, 3, and 4 of the chip U4 are connected to the pins 22, 20, and 21 of the chip U1. Correspondingly connected to realize the communication between the RS485 communication circuit and the chip U1, the No. 2 pin of the chip U4 is grounded through the resistor R35.

In this embodiment, the detonation method for the fire extinguishing bomb is as follows:

The first step is to connect the 12V external power supply when the system is powered on, the electrolytic capacitor C9 in the boost detonation control circuit begins to charge, and the DIP switch identification circuit in the physical address identification circuit is used to obtain the physical address of each fire extinguishing bomb and transmit the data. For the MCU control circuit, the internal program of the MCU control circuit identifies whether each pin is grounded to determine whether the internal circuit of the fire bomb is properly wired.

In the second step, after detecting that the internal circuit of the fire extinguishing bomb is properly wired, the MCU control circuit sends a delay command, and the fire extinguishing bomb starts to be bound, that is, it enters the countdown preparation stage, and the state of the fire extinguishing bomb is detected by the power detection power supply circuit and transmitted to the MCU. Control circuit, the MCU control circuit judges whether the fire extinguishing bomb is normal according to the state information of the fire extinguishing bomb compared with the preset value, if it is normal, go to the third step, if it is abnormal, then go to the sixth step;

The third step, after the binding is completed, the detection data obtained by the MCU control circuit is normal, then the explosion command is issued, the fire extinguishing bomb is disengaged, the 12V external power supply, the connection switch KEY-A, and the connection switch KEY-B are disconnected together, and the MCU control circuit After detecting the disconnection signal, start the countdown to detonation;

The fourth step, after the detonation countdown ends, the MCU control circuit controls the electrolytic capacitor C9 in the boost detonation control circuit to start discharging, converts the electrical energy into heat energy, and makes the heating bridge wire detonate the explosive to realize the detonation of the fire extinguishing bomb;

In the fifth step, if the detonation is completed or the detection data of the MCU control circuit is abnormal, the MCU control circuit controls the microcontroller to reset, so that the VDD power supply is disconnected, each circuit returns to the initial state, and the detonation is stopped.

The above description is a detailed description of the preferred feasible embodiments of the present invention, but the embodiments are not intended to limit the scope of the patent application of the present invention. All equivalent changes or modifications completed under the technical spirit suggested by the present invention shall belong to This invention covers the scope of the patent.

Claims (10)

1. A detonation control system for fire-extinguishing bombs, characterized in that it comprises an MCU control circuit, a power supply detection power supply circuit and a boost detonation control circuit, wherein the power supply detection power supply circuit and the boost detonation control circuit are all connected with the MCU control circuit Electrical signal connection, the power supply detection power supply circuit is used for continuous power supply and power supply detection to the MCU control circuit, and the boost detonation control circuit is used to realize the charge and discharge control of the capacitor to detonate the explosive.
2. A detonation control system for fire-extinguishing bombs according to claim 1, further comprising a physical address identification circuit and an RS485 communication circuit, wherein the physical address identification circuit is electrically connected to the MCU control circuit, so that the The physical address identification circuit is used to set the physical address of each fire extinguishing bomb, the RS485 communication circuit is electrically connected with the MCU control circuit, and the MCU control circuit is connected to the mainboard of the drone through the RS485 communication circuit. Information transfer.
3. The detonation control system for fire extinguishing bombs according to claim 2, wherein the MCU control circuit comprises a chip U1, the PB0 port, PA1 port, PA7 port of the chip U1 and the boost detonation The control circuit is connected to realize the instruction transmission between the chip U1 and the boost detonation control circuit, and the PB3 to PB5 ports of the chip U1 are connected to the physical address identification circuit, and are used to realize the chip U1 receiving the physical address identification circuit. address information, the PB6 port and the PA0-WKUP port of the chip U1 are connected to the power supply detection and power supply circuit to realize signal transmission between the chip U1 and the power supply detection power supply circuit, and the PA8 to PA10 ports of the chip U1 are connected to the RS485 The communication circuit is connected to realize the information transmission between the chip U1 and the RS485 communication circuit.
4. A detonation control system for fire-extinguishing bombs according to claim 3, wherein the physical address identification circuit includes an interface P2, and pins 2 to 5 of the interface P2 are connected to the interface P2 through an RC filter circuit. The pins 30 to 33 of the chip U1 are connected correspondingly, and the RC filter circuit is used to eliminate the interference signal generated in the process of dialing the switch.
5. A detonation control system for fire-extinguishing bombs according to claim 4, wherein the power supply detection circuit comprises an interface P1 and a battery BT1, and the No. 6 pin of the interface P1 is connected through a zener diode D4 There is a chip U2, the chip U2 is used to convert the 12V external power supply to 3.3V, the 3.3V power supply is connected to the VDD power supply through the capacitor C5, the electrolytic capacitor C6, and the Zener diode D3, and the VDD power supply is used to supply power to the microcontroller , the battery BT1 is connected to the MOS transistor Q1 through the Zener diode D1, the Zener diode D1 is connected to the transistor Q2 through the resistor R4, the transistor Q2 is connected to the 34 pin of the chip U1 through the resistor R3, the resistor R1 connect.
6. The detonation control system for a fire extinguishing bomb according to claim 5, wherein the boost detonation control circuit comprises a battery BT2, a chip U3 and an interface P3, the battery BT2 and the 5 of the chip U3 The No. 4 pin of the chip U3 is connected to the No. 8 pin of the chip U1 through the resistor R11, and the No. 1 pin of the chip U3 is connected to the resistor R12 through the capacitor C8 and the Zener diode D7. and resistor R13 are grounded, the Zener diode D7 is connected in parallel with two electrolytic capacitors C9 grounded, capacitor C10 is grounded, and the capacitor C10 is connected with the No. 2 pin of the interface P3, and the No. 1 pin of the interface P3 The MOS transistor Q3 is connected through the resistor R16, and the MOS transistor Q3 is connected to the pin 15 of the chip U1 through the resistor R14.
7. A detonation control system for fire-extinguishing bombs according to claim 6, wherein the RS485 communication circuit comprises a chip U4, and pins 6 and 7 of the chip U4 are connected to pins 3 and 7 of the interface P1. The No. 4 pin is connected correspondingly, the No. 1, 3, and No. 4 pins of the chip U4 are correspondingly connected to the 22, 20, and 21 pins of the chip U1, and the No. 2 pin of the chip U4 is grounded through the resistor R35.
8. A detonation control system for fire-extinguishing bombs according to claim 5, characterized in that, the No. 1 and No. 2 pins of the interface P1 are correspondingly connected with a switch KEY-A and a connection switch KEY-B, and the connection The switch KEY-A is connected to pin 13 of the chip U1 through the resistor R31, and the connection switch KEY-B is connected to the VDD power supply.
9. A detonation control system for a fire extinguishing bomb according to claim 3, characterized in that, a passive crystal oscillator Y1 is connected to the No. 2 pin of the chip U1, and the passive crystal oscillator Y1 is used to provide the chip U1 with stable clock signal.
10. A detonation method for a fire-extinguishing bomb, comprising the detonation control system according to any one of claims 2 to 9, wherein,

    The first step is to turn on the 12V external power supply, use the physical address identification circuit to obtain the physical address of each fire extinguishing bomb, and transmit the data to the MCU control circuit, the MCU control circuit reads the data information and judges the fire extinguishing. Check whether the internal circuit of the bomb is properly wired. When the power is turned on, the electrolytic capacitor C9 in the boost detonation control circuit begins to charge;

    In the second step, after detecting that the internal circuit of the fire extinguishing bomb is properly wired, the MCU control circuit sends a delay command to start the countdown preparation stage, and detects the state of the fire extinguishing bomb through the power detection power supply circuit and transmits it to the MCU control circuit. The control circuit judges whether the fire-extinguishing bomb is normal according to the state information of the fire-extinguishing bomb compared with the preset value, if it is normal, go to the third step;

    The third step, after the fire-extinguishing bomb is detached, the 12V external power supply, the connection switch KEY-A, and the connection switch KEY-B are disconnected together, and the MCU control circuit starts the detonation countdown after detecting the disconnection signal;

    The fourth step, after the detonation countdown ends, the MCU control circuit controls the electrolytic capacitor C9 in the boost detonation control circuit to start discharging, converts the electrical energy into heat energy, and makes the heating bridge wire detonate the explosive to realize the detonation of the fire extinguishing bomb;

    In the fifth step, if the detonation is completed or the detection data of the MCU control circuit is abnormal, the MCU control circuit resets the single-chip microcomputer, and each circuit returns to the initial state.

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