Electromagnetic reset type fire extinguishing bomb safety device and method based on PCB motor control

Abstract

The invention discloses an electromagnetic reset type fire extinguishing bomb safety device and method based on PCB motor control. The device comprises an electromagnetic pin puller, a PCB motor module and a fire extinguishing control circuit. The PCB motor module comprises a PCB motor stator, a PCB motor rotor, a positioning pin assembly, an igniter, an upper positioning shell and a lower positioning shell; the method comprises the steps that after the fire extinguishing control circuit receives a first-stage relieving instruction, the electromagnetic pin is screwed into the shell of the electromagnetic pin puller, and the PCB motor rotor rotates; after the second-level releasing instruction is received, the PCB motor rotor rotates until the positioning pin falls into the positioning hole, the PCB motor rotor stops rotating, and the detonating device, the detonating holes and the exploder are aligned; the exploder explodes when the target is attacked; during resetting, the PCB motor rotor rotates, the electromagnetic pin extends out, the detonating device, the detonating holes and the exploder are staggered, the electromagnetic pin puller is powered off and screwed out, the PCB motor rotor is clamped, and resetting is completed. The problems that an existing fire extinguishing bomb cannot reset after an ignition safety device is released, and detonation cannot be controlled are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of fire-fighting equipment, and in particular to an electromagnetic reset fire-extinguishing bomb safety device and method based on PCB motor control. Background Art

[0002] With the rapid development of drone technology, its application in firefighting is gaining increasing attention. Drones equipped with fire extinguishing bombs offer advantages such as high mobility, rapid response, and the ability to quickly reach complex fire scenes. These drones are particularly well-suited for firefighting operations such as high-rise building fires, forest fires, chemical fires, and other inaccessible fire environments, as well as large-scale fires in remote and forested areas with limited transportation.

[0003] Existing fire extinguishing bomb detonation methods mostly rely on simple mechanical triggers or proximity detonation. These methods are easily triggered by external interference (such as wind and airflow) or inaccurate spraying height during the drone spraying process, resulting in safety risks. Traditional fire extinguishing bombs often have difficulty hitting the target accurately due to the lack of precise control when dropped by drones. Especially in complex terrain or high-rise building fires, the spraying accuracy of fire extinguishing bombs directly affects the fire extinguishing effect. Therefore, during use, the reliability and resetability of the safety device are crucial, which is specifically reflected in:

[0004] First, fire extinguishing bombs are often detonated using mechanical triggering or proximity detonation. Mechanical triggering is susceptible to interference from external physical impacts. During drone deployment, if the fire extinguishing bomb collides with an obstacle or is unstable during delivery, it could trigger an unexpected trigger, creating a dangerous situation. Therefore, controlling the irreversibility of the ignition safety device after deactivation and restoring it to a safe state presents a technical challenge in safety device control.

[0005] Secondly, the safety devices of some fire extinguisher bombs cannot automatically reset after the ignition safety device is released. Once the device is triggered or fails to detonate after the ignition safety device is released, the entire device will be unusable, increasing the cost of firefighting. Therefore, how to design a safety device that is both highly safe and reliable is also a technical problem that needs to be solved.

[0006] Furthermore, existing fire-extinguishing bombs lack intelligent control and are unable to automatically trigger according to environmental parameters (such as temperature and smoke concentration). They must be manually detonated. This method is not only inefficient, but in certain complex and dangerous fire scenes, the inability to detonate in time can delay firefighting and even endanger the lives of rescuers. Therefore, designing a safety device that controls detonation via an external signal to prevent false triggering in complex environments is a technical challenge. Summary of the Invention

[0007] Purpose of the invention: In response to the shortcomings of the existing technology, the present invention proposes an electromagnetic reset fire extinguishing bomb safety device and method based on PCB motor control, which solves the problem that the existing fire extinguishing bomb safety device cannot be reset after the ignition safety device is released, resulting in the fire extinguishing bomb cannot be reused; at the same time, it solves the problem that the existing fire extinguishing bomb safety device has a low level of intelligence and cannot automatically control detonation according to different environmental parameters in complex and dangerous fire scenes, thereby delaying the fire extinguishing opportunity.

[0008] Technical solution: The present invention is an electromagnetic reset fire extinguishing bomb safety device based on PCB motor control, which includes an electromagnetic pin puller, a PCB motor module and a fire extinguishing control circuit;

[0009] The PCB motor module includes a PCB motor stator, a PCB motor rotor, a positioning pin assembly, an initiating device, an upper positioning housing and a lower positioning housing; the upper positioning housing is provided with an initiator;

[0010] There are a second positioning hole, a third positioning hole and a second explosion hole on the PCB motor stator;

[0011] The PCB motor rotor is provided with a magnet, a rotating shaft, a first positioning hole, a fifth positioning hole and a first detonation hole;

[0012] There is a third detonation hole on the lower positioning shell;

[0013] The electromagnetic pin puller is inserted into the first positioning hole and the second positioning hole to position the PCB motor rotor;

[0014] The detonating device, the first detonating hole, the second detonating hole, the third detonating hole and the detonator are aligned or staggered under the action of the PCB motor rotor.

[0015] The locating pin assembly includes a first locating pin and a second locating pin. The first locating pin is aligned with the fifth locating hole and the third locating hole, and the second locating pin is aligned with the fourth locating hole and the sixth locating hole.

[0016] The electromagnetic pin puller comprises an electromagnetic pin puller housing and an electromagnetic pin, and the electromagnetic pin is screwed into or out of the electromagnetic pin puller housing.

[0017] The electromagnetic pin puller housing is fixed on the upper positioning housing.

[0018] The PCB motor rotor is fixed in the lower positioning housing.

[0019] The electromagnetic pin puller, the first positioning pin, the second positioning pin, the detonator and the upper positioning shell are located in the same horizontal plane.

[0020] The electromagnetic reset method of the fire extinguishing bomb safety device based on PCB motor control of the present invention includes the following steps:

[0021] (1) In the initial state, the electromagnetic pin is locked in the first positioning hole and the second positioning hole, and the detonating device, the first detonating hole, the second detonating hole, the third detonating hole, and the detonator are misaligned;

[0022] (2) After the fire extinguishing control circuit receives the instruction to release the first-level ignition safety device, it energizes the electromagnetic pin puller, the electromagnetic pin is screwed into the electromagnetic pin puller housing, and the PCB motor rotor rotates; after the fire extinguishing control circuit receives the instruction to release the second-level ignition safety device, it energizes the PCB motor stator, controls the PCB motor rotor to drive the magnet to rotate until the positioning pin assembly falls into the positioning hole, the PCB motor rotor stops moving, and the detonating device, the first detonating hole, the second detonating hole, the third detonating hole, and the detonator are aligned;

[0023] (3) When attacking a target, the fire extinguishing control circuit controls the detonator to detonate; when releasing the protection, the fire extinguishing control circuit controls the PCB motor rotor to rotate counterclockwise, the electromagnetic pin extends, the detonating device, the first detonating hole, the second detonating hole, the third detonating hole, and the detonator are dislocated, and the fire extinguishing control circuit cuts off the power to the electromagnetic pin puller, and the electromagnetic pin rotates out and locks the PCB motor rotor to reset it.

[0024] In step (2), after the fire extinguishing control circuit receives the instruction to release the secondary ignition safety device, it energizes the PCB motor stator and controls the PCB motor rotor to drive the magnet to rotate until the first positioning pin, the second positioning pin are aligned with the third positioning hole, the fourth positioning hole, the fifth positioning hole, and the sixth positioning hole. Then, the first positioning pin and the second positioning pin fall from the fifth positioning hole and the sixth positioning hole into the third positioning hole and the fourth positioning hole, and the PCB motor rotor stops moving.

[0025] In step (3), the fire extinguishing control circuit sends a detonation signal to the detonator, and the energy storage capacitor discharges to the detonator through the fire extinguishing control circuit, generating energy to detonate the detonator, thereby detonating the fire extinguishing bomb.

[0026] In step (3), when the protection is released, the fire extinguishing control circuit sends a reset signal to the PCB motor rotor and the electromagnetic pin puller, the PCB motor rotor reverses, and the electromagnetic pin extends.

[0027] Beneficial effects: Compared with the prior art, the present invention has the following advantages:

[0028] (1) The present invention realizes precise control of the safety device by controlling the electromagnetic reset mechanism through the PCB motor. Before receiving the detonation command, the ignition safety device is always in a safe state, avoiding false triggering and improving the safety of the fire extinguishing bomb during use.

[0029] (2) The electromagnetic reset mechanism of the present invention quickly resets after receiving the reset command and returns to a safe state, so that the fire extinguishing bomb can be reused many times, which not only reduces the fire extinguishing cost but also improves the maintainability and operability of the fire extinguishing bomb.

[0030] (3) The present invention uses a micro PCB motor and advanced control algorithms, combined with various sensors, to automatically determine whether it is necessary to detonate a fire extinguishing bomb according to different environmental parameters, thereby realizing intelligent automatic fire extinguishing and improving fire extinguishing efficiency and response speed.

[0031] (4) The present invention adopts advanced micro-motor control technology and electromagnetic design, combined with various high-precision sensors, to monitor the working status of the device in real time and perform self-adjustment and protection, thereby improving the reliability and stability of the entire safety device and ensuring that the fire extinguishing bomb works normally at critical moments. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a general structural diagram of the electromagnetic reset fire extinguishing bomb safety device based on PCB motor control of the present invention;

[0033] Figure 2 This is a schematic diagram of the safety device hardware module of the electromagnetic reset fire extinguishing bomb safety device based on PCB motor control of the present invention;

[0034] Figure 3 This is a logic diagram of the ignition release safety device of the electromagnetic reset fire extinguishing bomb safety device based on PCB motor control of the present invention;

[0035] Figure 4 This is a structural diagram of the PCB motor module of the secondary ignition safety device of the electromagnetic reset fire extinguishing bomb safety device based on PCB motor control of the present invention;

[0036] Figure 5 This is a schematic diagram of the safety state of the electromagnetic reset fire extinguishing bomb safety device based on PCB motor control of the present invention;

[0037] Figure 6 This is a schematic diagram of the release state of the first-level ignition safety device of the electromagnetic reset fire extinguishing bomb safety device based on PCB motor control of the present invention;

[0038] Figure 7 This is a schematic diagram of the release state of the secondary ignition safety device of the electromagnetic reset fire extinguishing bomb safety device based on PCB motor control of the present invention;

[0039] Figure 8 This is a schematic diagram of the reset state of the electromagnetic reset fire extinguishing bomb safety device based on PCB motor control of the present invention. DETAILED DESCRIPTION

[0040] like Figures 1 to 8 As shown, the electromagnetic reset fire extinguishing bomb safety device based on PCB motor control of the present invention includes an electromagnetic pin puller 5, a PCB motor module and a fire extinguishing control circuit.

[0041] The PCB motor module includes a PCB motor stator 8, a PCB motor rotor 3, a positioning pin assembly, a detonator 4, an upper positioning housing 6, and a lower positioning housing 9. The positioning pin assembly includes a first positioning pin 1 and a second positioning pin 7. The electromagnetic pin puller 5, the first positioning pin 1, the second positioning pin 7, the detonator 2, and the upper positioning housing 6 are located in the same plane. The PCB motor rotor 3 is fixed in the lower positioning housing 9. In this embodiment, the PCB motor is a micromotor.

[0042] The electromagnetic reset type fire extinguishing bomb safety device based on PCB motor control of the present invention comprises an electromagnetic pin puller 5 and a PCB motor module.

[0043] The electromagnetic pin puller 5 comprises an electromagnetic pin puller housing 51 and an electromagnetic pin 52 , constituting a primary ignition safety device of the system.

[0044] The PCB motor module includes a PCB motor stator 8, a first positioning hole 31 of an electromagnetic pin puller, a second positioning hole 81, a third positioning hole 33 of a positioning pin, a fourth positioning hole 34, a fifth positioning hole 82, a sixth positioning hole 84, a first detonation hole 36, a second detonation hole 83, a magnet 32, a rotating shaft 35 and a PCB motor rotor 3, constituting a secondary ignition safety device of the system.

[0045] The electromagnetic reset method of the electromagnetic reset type fire extinguishing bomb safety device based on PCB motor control of the present invention comprises the following steps:

[0046] (1) In the initial state, the electromagnetic pin 52 is locked in the first positioning hole 31 and the second positioning hole 81 of the electromagnetic pin puller, the PCB motor rotor 3 cannot rotate, the PCB motor is in the original state, the detonating device 4, the first detonating hole 36, the second detonating hole 83, the third detonating hole 91, and the detonator 2 are in a misaligned state, and the system is in a safe state.

[0047] (2) After the fire extinguishing control circuit receives the instruction to release the first-level ignition safety device, it energizes the electromagnetic pin puller 5, and the electromagnetic pin 52 is screwed into the electromagnetic pin puller housing 51. The PCB motor rotor 3 is released from the limit and rotates. After the fire extinguishing control circuit receives the instruction to release the second-level ignition safety device, it energizes the coil in the PCB motor stator 8, controls the PCB motor rotor 3 to rotate clockwise, and under the control of the metal housing of the PCB motor rotor 3, the magnet 32 ​​rotates along with it until the first positioning pin 1 is aligned with the fifth positioning hole 82 and the third positioning hole 33, and the second positioning pin 7 is aligned with the fourth positioning hole 34 and the sixth positioning hole 84. Then, the first positioning pin 1 falls from the fifth positioning hole 82 into the third positioning hole 33, and the second positioning pin 7 falls from the sixth positioning hole 84 into the fourth positioning hole 34. The PCB motor rotor 3 cannot continue to move. The detonating device 4, the first detonating hole 36, the second detonating hole 83, the third detonating hole 91, and the detonator 2 are aligned, and the system is in the state of releasing the second-level ignition safety device.

[0048] (3) When attacking a target, the fire extinguishing control circuit controls the detonator 2 to detonate. During the release process, if the target is abandoned, the fire extinguishing control circuit controls the PCB motor rotor 3 to rotate counterclockwise, and the detonating device 4, the first detonating hole 36, the second detonating hole 83, the third detonating hole 91, and the detonator 2 are dislocated. After the PCB motor is restored to its original state, the fire extinguishing control circuit cuts off the power to the electromagnetic pin puller 5, and the electromagnetic pin 52 is rotated out, locking the PCB motor rotor 3 and re-defining the position of the PCB motor rotor 3, thereby achieving a safe reset state.

[0049] The entire safety device is secured in place by an upper positioning housing 6 and a lower positioning housing 9. The internal components move horizontally and rotationally within the positioning housing. The electromagnetic pin puller 5 in the electromagnetic pin puller module is a cylindrical structure secured by the upper positioning housing 6. The PCB motor module is secured by the lower positioning housing 9. The PCB motor is equipped with a first detonation hole 36 and a second detonation hole 83. The detonator 4 is mounted above the first detonation hole 36, and the detonator 2 is embedded in the upper positioning housing 6.

[0050] The electrical connections of the present invention are as follows: the detonator 2, electromagnetic pin puller 5, and PCB motor are all connected to the fire extinguishing control circuit via wiring, and are powered and controlled by the fire extinguishing control circuit. When the fire extinguishing bomb is not in use, the fire extinguishing control circuit is in an initialized safe state. At this time, the detonator, electromagnetic pin puller, and PCB motor are all powered off, and the electromagnetic pin 52 of the electromagnetic pin puller is extended, locking the ignition safety mechanism and ensuring the fire extinguishing bomb is in a safe state. When the fire extinguishing bomb is in use, the fire extinguishing control circuit receives an external detonation command. Upon receiving the detonation command, the fire extinguishing control circuit first sends a control signal to the electromagnetic pin puller. When the electromagnetic pin puller's electromagnet is energized, it generates a magnetic field that attracts the electromagnetic pin 52, thereby unlocking the ignition safety mechanism. Simultaneously with the unlocking of the electromagnetic pin puller, the fire extinguishing control circuit sends a drive signal to the PCB motor, causing it to begin operating. The PCB motor then drives the relevant mechanisms to disengage the secondary ignition safety mechanism.

[0051] When the ignition safety device mechanism is completely released, the fire extinguishing control circuit sends a detonation signal to the detonator. At this point, the energy storage capacitor discharges to the detonator through the fire extinguishing control circuit, generating energy to detonate the detonator. The explosive energy of the detonator is transmitted through the detonating device, ultimately detonating the explosives and achieving the detonation of the fire extinguishing bomb. If the detonation needs to be canceled for some reason during the detonation process, the fire extinguishing control circuit sends a reset signal to the PCB motor and electromagnetic pin puller, causing the PCB motor to reverse and the electromagnetic pin 52 to re-extend and return to its initial state. Throughout the control process, the fire extinguishing control circuit monitors the status of each component in real time, such as the current of the electromagnetic pin puller and the speed of the PCB motor, to ensure that each step is executed correctly. If an abnormality is detected, the control circuit immediately cuts off the power supply and enters a safe state.

[0052] The electromagnetic reset fire extinguishing bomb safety device based on micro PCB motor control of the present invention includes three states:

[0053] The safe state, ignition safety device release state, and reset state are shown in the figure below. The safe state is shown in the figure below. The PCB motor is provided with a first detonation hole 36 and a second detonation hole 83 that penetrate the upper and lower surfaces. The detonator 4, the first detonation hole 36, the second detonation hole 83, the third detonation hole 91, and the initiator 2 are misaligned and not connected.

[0054] The transition from the safe state to the ignition safety device release state requires two levels of ignition safety device release, namely the electromagnetic pin puller ignition safety device and the PCB motor ignition safety device. The electromagnetic pin puller ignition safety device is a first-level ignition safety device, and the PCB motor ignition safety device is a second-level ignition safety device. In the initial state, after the fire extinguishing control circuit receives the command to release the first-level ignition safety device, it energizes the electromagnetic pin puller 5, and the electromagnetic pin 52 is screwed into the electromagnetic pin puller housing 51. The PCB motor rotor 3 is released from the limit and rotates, and the first-level ignition safety device is released. Figure 5 shown.

[0055] After the first-level ignition safety device is released, the fire extinguishing control circuit receives the instruction to release the second-level ignition safety device, and energizes the coil in the PCB motor stator 8 to control the PCB motor rotor 3 to rotate clockwise. Under the control of the metal shell of the PCB motor rotor 3, the magnet 32 ​​rotates together. After the first positioning pin 1 and the second positioning pin 7 are aligned with the third positioning hole 33, the fourth positioning hole 34, the fifth positioning hole 82, and the sixth positioning hole 84, the first positioning pin 1 and the second positioning pin 7 fall from the fifth positioning hole 82 and the sixth positioning hole 84 into the third positioning hole 33 and the fourth positioning hole 34. The PCB motor rotor 3 cannot move further. The detonating device 4, the first detonating hole 36, the second detonating hole 83, the third detonating hole 91, and the detonator 2 are aligned. The system is in the state of releasing the second-level ignition safety device. Figure 6 shown.

[0056] At this time, if the detonation control system receives the detonation signal, the detonator 2 will be activated, and the energy will be transmitted through the aligned first detonation hole 36, the second detonation hole 83, and the third detonation hole 91, thereby triggering the detonation device 4 to act, and finally detonating the main charge to achieve the amplification of the explosion energy.

[0057] During the release process, if the attack target is abandoned, the fire extinguishing control circuit controls the PCB motor rotor 3 to rotate counterclockwise, and the detonating device 4, the first detonating hole 36, the second detonating hole 83, the third detonating hole 91, and the detonator 2 are dislocated. After the PCB motor is restored to its original state, the fire extinguishing control circuit cuts off the power to the electromagnetic pin puller 5, and the electromagnetic pin 52 is rotated out, locking the PCB motor rotor 3 and re-defining the position of the PCB motor rotor 3, thereby achieving a safe reset state.

Claims

1. An electromagnetic reset fire extinguishing bomb safety device based on PCB motor control, characterized by: It includes an electromagnetic pin puller (5), a PCB motor module and a fire extinguishing control circuit; The PCB motor module comprises a PCB motor stator (8), a PCB motor rotor (3), a positioning pin assembly, a detonating device (4), an upper positioning shell (6) and a lower positioning shell (9); a detonator (2) is provided on the upper positioning shell (6); The PCB motor stator (8) is provided with a second positioning hole (81), a third positioning hole (33) and a second detonation hole (83); The PCB motor rotor (3) is provided with a magnet (32), a rotating shaft (35), a first positioning hole (31), a fifth positioning hole (82) and a first detonation hole (36); The lower positioning shell (9) is provided with a third detonation hole (91); The electromagnetic pin puller is inserted into the first positioning hole (31) and the second positioning hole (81) to position the PCB motor rotor; The detonating device (4), the first detonating hole (36), the second detonating hole (83), the third detonating hole (91) and the detonator (2) are aligned or staggered under the action of the PCB motor rotor.

2. The electromagnetic reset fire extinguishing bomb safety device based on PCB motor control according to claim 1 is characterized in that: The positioning pin assembly includes a first positioning pin and a second positioning pin, wherein the first positioning pin is aligned with the fifth positioning hole (82) and the third positioning hole (33), and the second positioning pin is aligned with the fourth positioning hole (34) and the sixth positioning hole (84).

3. The electromagnetic reset fire extinguishing bomb safety device based on PCB motor control according to claim 1 is characterized in that: The electromagnetic pin puller (5) comprises an electromagnetic pin puller housing (51) and an electromagnetic pin (52), and the electromagnetic pin (52) is screwed into or out of the electromagnetic pin puller housing (51).

4. The electromagnetic reset fire extinguishing bomb safety device based on PCB motor control according to claim 3 is characterized in that: The electromagnetic pin puller housing (51) is fixed on the upper positioning housing (6).

5. The electromagnetic reset fire extinguishing bomb safety device based on PCB motor control according to claim 1 is characterized in that: The PCB motor rotor (3) is fixed in the lower positioning housing (9).

6. The electromagnetic reset fire extinguishing bomb safety device based on PCB motor control according to claim 1 is characterized in that: The electromagnetic pin puller (5), the first positioning pin (1), the second positioning pin (7), the detonator (2), and the upper positioning shell (6) are located in the same horizontal plane.

7. An electromagnetic reset method for a fire extinguishing bomb safety device based on PCB motor control according to claim 1, characterized in that: The following steps are involved: (1) In the initial state, the electromagnetic pin is locked in the first positioning hole and the second positioning hole, and the detonating device, the first detonating hole, the second detonating hole, the third detonating hole, and the detonator are misaligned; (2) After the fire extinguishing control circuit receives the instruction to release the first-level ignition safety device, it energizes the electromagnetic pin puller, the electromagnetic pin is screwed into the electromagnetic pin puller housing, and the PCB motor rotor rotates; after the fire extinguishing control circuit receives the instruction to release the second-level ignition safety device, it energizes the PCB motor stator, controls the PCB motor rotor to drive the magnet to rotate until the positioning pin assembly falls into the positioning hole, the PCB motor rotor stops moving, and the detonating device, the first detonating hole, the second detonating hole, the third detonating hole, and the detonator are aligned; (3) When attacking a target, the fire extinguishing control circuit controls the detonator to detonate; when releasing the protection, the fire extinguishing control circuit controls the PCB motor rotor to rotate counterclockwise, the electromagnetic pin extends, the detonating device, the first detonating hole, the second detonating hole, the third detonating hole, and the detonator are dislocated, and the fire extinguishing control circuit cuts off the power to the electromagnetic pin puller, and the electromagnetic pin rotates out and locks the PCB motor rotor to reset it.

8. The electromagnetic reset method of the fire extinguishing bomb safety device based on PCB motor control according to claim 6 is characterized in that: In step (2), after the fire extinguishing control circuit receives the instruction to release the secondary ignition safety device, it energizes the PCB motor stator and controls the PCB motor rotor to drive the magnet to rotate until the first positioning pin, the second positioning pin are aligned with the third positioning hole, the fourth positioning hole, the fifth positioning hole, and the sixth positioning hole. Then, the first positioning pin and the second positioning pin fall from the fifth positioning hole and the sixth positioning hole into the third positioning hole and the fourth positioning hole, and the PCB motor rotor stops moving.

9. The electromagnetic reset method of the fire extinguishing bomb safety device based on PCB motor control according to claim 6, characterized in that: In step (3), the fire extinguishing control circuit sends a detonation signal to the detonator, and the energy storage capacitor discharges to the detonator through the fire extinguishing control circuit, generating energy to detonate the detonator, thereby detonating the fire extinguishing bomb.

10. The electromagnetic reset method of the fire extinguishing bomb safety device based on PCB motor control according to claim 6, characterized in that: In step (3), when the protection is released, the fire extinguishing control circuit sends a reset signal to the PCB motor rotor and the electromagnetic pin puller, the PCB motor rotor reverses, and the electromagnetic pin extends.

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