Small low-power semiconductor laser ignition device

Abstract

According to the small low-power semiconductor laser ignition device, an energy transfer structure of detonating cord-explosion-to-ignition assembly is adopted, compared with an optical fiber, the detonating cord is low in vulnerability and can better adapt to the severe working environment, and the working reliability of the laser ignition device under the extreme working condition is improved; the functions of wireless ignition, time sequence ignition and multi-point ignition are achieved through wireless communication, and the problem that most existing laser ignition systems can only achieve the single-point ignition function is solved. Besides, the laser ignition device also has the characteristics of self power supply, small size, difficulty in damage, multi-point control and sequential control, and can make up for the defects in the prior art, so that the laser ignition device can be applied in more scenes.

Description

Technical Field

[0001] This invention belongs to the field of laser ignition technology, and particularly relates to a small, low-power semiconductor laser ignition device. Background Technology

[0002] Laser ignition technology, benefiting from its fast system response, long lifespan, and anti-interference characteristics, has been widely applied in aerospace and weapon systems. Current laser ignition devices typically consist of a power supply, a laser, an optical fiber, and an ignition charge. The laser is usually a high-power fiber-coupled laser, powered by a dedicated power supply. The high-power laser is transmitted via optical fiber to the end face of the ignition charge, thereby igniting the propellant. However, this entire device often suffers from the following problems: 1. Fiber-coupled lasers typically have high power and require precise current control for driving, thus placing high demands on the input power supply. A dedicated driving power supply is needed to drive the laser, which makes the ignition device dependent on an external power supply and unable to operate independently.

[0003] 2. Fiber-coupled lasers are relatively large, and the laser transmission path also requires a certain amount of space. Therefore, the entire laser ignition device is large in size and is not suitable for applications where the size of the ignition device is limited.

[0004] 3. Laser ignition devices using fiber-coupled lasers rely on fiber optic transmission of the laser. In some harsh working environments, the fiber optic cable is easily damaged, which will cause the device to fail and the ignition function to be unavailable.

[0005] 4. Most existing laser ignition devices are single-point output devices and do not have multi-point ignition or timing-controlled ignition functions. Summary of the Invention

[0006] To address the aforementioned issues, this invention provides a small, low-power semiconductor laser ignition device that features self-powered operation, small size, durability, multi-point control, and timing control, enabling the laser ignition device to be used in more scenarios.

[0007] A small, low-power semiconductor laser ignition device includes a control device and multiple ignition units; wherein the control device is used to realize single-point ignition control, multi-point ignition control, and timing ignition control of each ignition unit via wireless communication. The ignition unit includes an ignition control component, a semiconductor laser, a focusing lens, an initial charge, a detonating cord, and an explosion-to-ignition component. After receiving the ignition signal from the control device via wireless communication, the ignition control component controls the semiconductor laser to emit a laser beam. The laser beam is focused by the focusing lens and irradiates the surface of the initial charge, causing the initial charge to detonate. The detonation energy is transferred to the explosion-to-ignition component through the detonating cord, where the explosion-to-ignition component converts the detonation energy into flame output, thus completing the ignition function.

[0008] Furthermore, the control device includes an application and an enhanced WiFi wireless communication transmitter; The application is used to search for available ignition units and establish wireless communication with them, and then send ignition commands simultaneously to any number of ignition units with which wireless communication has been established, or send ignition commands one by one in a set time sequence. The enhanced WiFi wireless communication transmitter is used to send the ignition command set by the application to the ignition unit.

[0009] Furthermore, the ignition control components include an enhanced WiFi wireless communication receiver and a constant current source drive circuit; The enhanced WiFi wireless communication receiver is used to receive the ignition command sent by the enhanced WiFi wireless communication transmitter, and is also used to control the constant current drive circuit to turn on after receiving the ignition command. The constant current source driving circuit is used to output a constant current source when it is turned on, thereby controlling the output laser of the semiconductor laser.

[0010] Furthermore, the ignition unit also includes a miniature battery for powering the enhanced WiFi wireless communication receiver and the constant current source drive circuit.

[0011] Furthermore, the focusing lens is a short-focal-length aspherical lens with a focal length of 3mm, used to converge the laser beam emitted by the semiconductor laser into a spot with a diameter of no more than 300μm at the end face of the initial charge.

[0012] Furthermore, the ignition control assembly, semiconductor laser, focusing lens, and initial charge constitute the initiation assembly, which is installed inside the housing, which provides mechanical protection for the initiation assembly.

[0013] Furthermore, a small low-power semiconductor laser ignition device also includes a connecting cylinder for connecting and fixing the initiating component and the detonating cord.

[0014] Furthermore, the nominal power of the semiconductor laser is 2W.

[0015] Beneficial effects: 1. This invention provides a small, low-power semiconductor laser ignition device, employing an energy transfer structure of "detonating cord-explosion-to-ignition assembly." Compared to optical fiber, the detonating cord has lower fragility and is better suited to harsh working environments, improving the reliability of the laser ignition device under extreme conditions. Wireless communication enables wireless ignition, time-sequential ignition, and multi-point ignition functions, solving the problem that existing laser ignition systems can only achieve single-point ignition. Furthermore, this invention features self-powered operation, small size, low damage, multi-point control, and time-sequential control, overcoming the shortcomings of existing technologies and enabling the laser ignition device to be applied in more scenarios.

[0016] 2. This invention provides a small, low-power semiconductor laser ignition device with a built-in micro battery and constant current drive circuit, avoiding the use of an external power supply module. This solves the problem that general ignition devices rely on external power supply and cannot work independently, making the ignition unit flexible in use and capable of independent operation.

[0017] 3. This invention provides a small, low-power semiconductor laser ignition device, which uses a low-power semiconductor laser as the laser source, thus solving the problem of excessively large ignition device size caused by using a high-power fiber-coupled laser. Attached Figure Description

[0018] Figure 1 A schematic diagram of the composition of the small low-power semiconductor laser ignition device provided by the present invention; Figure 2 A schematic diagram of the ignition unit structure of the small low-power semiconductor laser ignition device provided by the present invention; Among them, 1-Initiating component; 2-Connecting cylinder; 3-Detonating cord; 4-Explosion-to-ignition component. Detailed Implementation

[0019] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

[0020] To address the problems of reliance on external power sources and large device size associated with current laser ignition devices that use dedicated power modules to drive high-power fiber-coupled lasers, as well as the high vulnerability of these devices due to fiber-optic laser transmission, and the limitation of existing laser ignition devices to single-point ignition and inability to achieve multi-point or sequential ignition, this invention provides a small, low-power semiconductor laser ignition device, such as... Figure 1 As shown, it consists of control equipment and multiple ignition units. When performing an ignition task, several ignition units can be installed in a predetermined position. The control device is used to search for available ignition units and establish wireless communication with them. The control device application selects the ignition units to be controlled and sets the ignition timing to achieve different functions such as single-point ignition, multi-point ignition, and time-sequential ignition. The main body of the control device is a signal transmitter enhanced WiFi wireless communication module (hereinafter referred to as the transmitter), which is controlled by a dedicated application installed in the control device and can establish wireless communication with multiple signal receiver enhanced WiFi wireless communication modules (hereinafter referred to as receivers). Through the dedicated application, the transmitter can be controlled to send ignition commands to any number of signal receivers with established wireless communication. Commands can be sent to the receivers simultaneously or sequentially at set times, thus realizing one-to-many wireless control, multi-point ignition, and time-sequential ignition functions.

[0021] The ignition unit receives the ignition signal and ultimately performs the ignition function. For example... Figure 2 As shown, the ignition unit consists of four parts: the initiating component 1, the connecting cylinder 2, the detonating cord 3, and the explosion-to-ignition component 4. The launching assembly consists of six parts: a housing, a micro-battery, an ignition control assembly, a semiconductor laser, a focusing lens, and the launching charge. The housing provides mechanical protection for the internal structure. The micro-battery powers the ignition control assembly. The ignition control assembly includes an enhanced WiFi wireless communication module at the receiver end and a constant current drive circuit. In each selected ignition unit, the enhanced WiFi wireless communication module in the ignition control assembly receives the ignition signal transmitted by the enhanced WiFi wireless communication module at the signal transmitter end and controls the constant current drive circuit to conduct. The constant current drive circuit provides a constant current output to stably drive the semiconductor laser. The semiconductor laser is the laser source with a center wavelength of 808nm and a nominal power of 2W. The focusing lens is an optimized short-focal-length aspherical lens with a focal length of 3mm, which can focus the laser beam emitted by the semiconductor laser into a spot with a diameter of no more than 300μm at the end face of the launching charge. The launching charge is a laser-sensitive agent that detonates and triggers the detonating cord when exposed to laser light. The connecting cylinder is used to connect and fix the launching assembly and the detonating cord. The detonation-to-ignition assembly is used to receive the detonation energy transmitted by the detonating cord and convert it into flame output, ultimately achieving the ignition function.

[0022] Of course, the present invention may have other various embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and modifications according to the present invention, but these corresponding changes and modifications should all fall within the protection scope of the appended claims.

Claims

1. A small, low-power semiconductor laser ignition device, characterized in that, It includes a control device and multiple ignition units; wherein, the control device is used to realize single-point ignition control, multi-point ignition control, and timing ignition control of each ignition unit through wireless communication. The ignition unit includes an ignition control component, a semiconductor laser, a focusing lens, an initial charge, a detonating cord, and an explosion-to-ignition component. After receiving the ignition signal from the control device via wireless communication, the ignition control component controls the semiconductor laser to emit a laser beam. The laser beam is focused by the focusing lens and irradiates the surface of the initial charge, causing the initial charge to detonate. The detonation energy is transferred to the explosion-to-ignition component via the detonating cord, where the explosion-to-ignition component converts the detonation energy into flame output, thus completing the ignition function.

2. The small low-power semiconductor laser ignition device as described in claim 1, characterized in that, The control device includes an application program and an enhanced WiFi wireless communication transmitter; The application is used to search for available ignition units and establish wireless communication with them, and then send ignition commands simultaneously to any number of ignition units with which wireless communication has been established, or send ignition commands one by one in a set time sequence. The enhanced WiFi wireless communication transmitter is used to send the ignition command set by the application to the ignition unit.

3. The small low-power semiconductor laser ignition device as described in claim 2, characterized in that, The ignition control components include an enhanced WiFi wireless communication receiver and a constant current source drive circuit; The enhanced WiFi wireless communication receiver is used to receive the ignition command sent by the enhanced WiFi wireless communication transmitter, and is also used to control the constant current drive circuit to turn on after receiving the ignition command. The constant current source driving circuit is used to output a constant current source when it is turned on, thereby controlling the output laser of the semiconductor laser.

4. The small low-power semiconductor laser ignition device as described in claim 3, characterized in that, The ignition unit also includes a miniature battery for powering the enhanced WiFi wireless communication receiver and the constant current source drive circuit.

5. The small low-power semiconductor laser ignition device as described in claim 1, characterized in that, The focusing lens is a short-focal-length aspherical lens with a focal length of 3mm, used to converge the laser beam emitted by the semiconductor laser into a spot with a diameter of no more than 300μm at the starting charge end face.

6. The small low-power semiconductor laser ignition device as described in claim 1, characterized in that, The ignition control assembly, semiconductor laser, focusing lens, and initial charge constitute the ignition assembly, which is installed inside the housing, which provides mechanical protection for the ignition assembly.

7. The small low-power semiconductor laser ignition device as described in claim 6, characterized in that, It also includes a connecting tube for connecting and securing the launching assembly and the detonating cord.

8. The small low-power semiconductor laser ignition device as described in claim 1, characterized in that, The nominal power of the semiconductor laser is 2W.

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