A km-level long-distance firework firing safety control device

Abstract

The application discloses a km-level long-distance firework firing safety control device, which comprises an alignment launching unit and a receiving control unit, the alignment launching unit comprises an alignment module, a high-power laser coding signal launching module and a light beam shaping and expanding module, the alignment module and the high-power laser coding signal launching module are fixedly connected, the light beam shaping and expanding module is installed on an output light path of the high-power laser coding signal launching module, the receiving control unit comprises a receiving sensing module and a decoding control module which are connected with each other, and the decoding control module is provided with one or more control joints for igniting fireworks. The application has the advantages of a control distance reaching km or above, simple and convenient erection, strong anti-interference capability and very high safety.

Description

Technical Field

[0001] This invention relates to fireworks control equipment, specifically to a long-distance fireworks display safety control device with a range of kilometers (km). Background Technology

[0002] To ensure the safety of fireworks displays and prevent accidents, safety technology and management are crucial. Large-scale fireworks displays require maintaining a safe distance of over 1 km, thus necessitating a long-range (km-level) safety control technology for fireworks displays.

[0003] Currently, there are various fireworks control technologies, including direct manual ignition, wired ignition, wireless remote control ignition, and laser remote control ignition. Direct manual ignition is the earliest method, but due to its short ignition distance, it is very unsafe and is generally used for home fireworks displays. Wired ignition increases the control distance, improves safety, and can range from a few meters to thousands of meters, making it suitable for both home and large-scale fireworks displays. It is currently a commonly used control method. However, this technology is inconvenient to use because it requires wiring, especially for large-scale fireworks displays where the wiring path is obstructed by green belts, ditches, pits, or even rivers, requiring significant manpower, material resources, and financial investment. Furthermore, long-term outdoor use of wiring can lead to wear and tear, aging, and decreased stability and reliability. Long-term fixed wiring is also susceptible to damage from construction and other external factors, posing safety hazards. Therefore, wired ignition methods suffer from inconvenience and reduced reliability and safety over long-term use. Wireless remote control ignition is a commonly used method for fireworks displays. It's convenient, offers a good user experience, and is very popular, typically used for home fireworks. However, its remote control distance is limited, usually only 20-30 meters. Longer distances require higher power and directional antennas, which are costly and can be harmful to health due to excessive radio power. Furthermore, in today's world with numerous electronic devices and complex electromagnetic environments, this method is susceptible to interference from external electromagnetic signals, leading to false ignitions and poor safety. This technology is rarely used in large-scale fireworks displays. Laser signals offer advantages such as good directionality and immunity to external electromagnetic interference. Therefore, laser remote control ignition technology offers high security and confidentiality, while also combining the convenience and user experience of wireless remote control ignition. Products using laser signals are already available and well-received. However, due to current technological limitations, the maximum control distance for laser remote control ignition is approximately 50 meters, making it only suitable for home fireworks displays and unsuitable for long-distance large-scale fireworks displays.

[0004] Therefore, given the current complex electromagnetic radiation signal environment, the need for long-distance control at the km level, and the requirement to ensure the safety of fireworks displays and social stability, finding a long-distance, km-level, and interference-resistant safety control device for fireworks displays has become an urgent problem to be solved. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a long-distance fireworks display safety control device with a control distance of over km, which is simple and convenient to set up, has strong anti-interference ability, and is extremely safe.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0007] A safety control device for long-distance fireworks display at a range of kilometers includes an alignment and launch unit and a receiving and control unit. The alignment and launch unit includes an alignment module, a high-power laser coded signal emission module, and a beam shaping and expanding module. The alignment module and the high-power laser coded signal emission module are fixedly connected. The beam shaping and expanding module is installed on the output optical path of the high-power laser coded signal emission module. The receiving and control unit includes a receiving sensing module and a decoding control module connected to each other. The decoding control module has one or more control connectors for igniting fireworks.

[0008] Optionally, the high-power laser encoded signal transmitting module includes an encoder, an amplifier, a laser transmitter, and an alignment laser signal driving source. The amplifier and the alignment laser signal driving source are respectively connected to the control terminal of the laser transmitter, and the input terminal of the amplifier is connected to the encoder.

[0009] Optionally, the encoder includes one or more parallel-connected encoding branches, each encoding branch including a serially connected encoding circuit and an encoding switch. The output of the encoding circuit is connected to the input of an amplifier via the encoding switch. The decoding control module includes one or more decoding control branches, each decoding control branch including a decoding circuit, an amplification circuit, and a control and display circuit connected in sequence. The decoding circuit is connected to the output of the receiving induction module, and the control and display circuit has a control connector for igniting fireworks.

[0010] Optionally, the beam shaping and expanding module includes a beam shaping lens, a first beam expanding lens, and a second beam expanding lens arranged sequentially along the optical axis, so that the laser signal emitted by the laser emitter becomes a laser signal with a circular cross-section and an enlarged area after passing through the beam shaping lens, the first beam expanding lens, and the second beam expanding lens.

[0011] Optionally, the receiving sensing module includes a control signal receiving sensing module and an alignment signal sensing module. The output of the control signal receiving sensing module is connected to the decoding control module, and the alignment signal sensing module is connected to a corresponding alignment display module.

[0012] Optionally, the receiving sensing module has a receiving surface for receiving signals, the receiving surface is provided with three concentric circles, the number of control signal receiving sensing modules is multiple and they are respectively arranged in the innermost concentric circle, the number of alignment signal sensing modules is multiple and they are evenly distributed on the inner annular band formed by the three concentric circles, and the alignment display module is evenly distributed on the outer annular band formed by the three concentric circles and located outside the corresponding alignment signal sensing module.

[0013] Optionally, the alignment signal sensing module includes a photodiode D1 and a resistor R1 connected in series. The photodiode D1 and the resistor R1 are connected in series to a power supply. The alignment display module includes a transistor Q1, a transistor Q2, a resistor R2, and a light-emitting diode D2. The base of the transistor Q1 is connected to the intermediate node between the photodiode D1 and the resistor R1. The transistors Q1 and Q2 are cascaded to form a first and second stage amplifier circuit. The resistor R2 and the light-emitting diode D2 are connected in series at the output terminal of the first and second stage amplifier circuit.

[0014] Optionally, the control and display circuit includes transistor Q3, transistor Q4, resistor R3, light-emitting diode D3, and control connector K1 for igniting fireworks. The base of transistor Q3 is connected to the output terminal of the amplifier circuit. Transistor Q3 and transistor Q4 are cascaded to form a second-stage amplifier circuit. The control connector K1 is arranged in parallel at the output terminal of the second-stage amplifier circuit. Resistor R3 and light-emitting diode D3 are connected in series and then connected in parallel with control connector K1.

[0015] Optionally, the control and display circuit includes an optocoupler switch U1, a resistor R4, a light-emitting diode D4, and a control connector K1 for igniting fireworks. The first circuit on one side of the optocoupler switch U1 is connected to the output terminal of the amplifier circuit. The control connector K1 is connected in series on the second circuit on the other side of the optocoupler switch U1. The resistor R4 and the light-emitting diode D4 are connected in series and then connected in parallel with the control connector K1.

[0016] Furthermore, the present invention also provides an application method for the aforementioned km-level long-distance fireworks display safety control device, including:

[0017] 1) Turn on the power to the receiving control unit so that the receiving control unit is in working condition;

[0018] 2) First, the high-power laser encoding signal transmitting module is aligned with the receiving surface of the receiving sensing module through the alignment module to complete the initial alignment; then, the alignment laser signal driving source controls the laser transmitter to emit the alignment laser signal, and the emission direction of the laser transmitter is adjusted so that all the alignment display modules in the receiving sensing module are lit, thus completing the precise alignment.

[0019] 3) Press the encoding switch of each encoding branch in sequence so that each encoding branch emits an encoding signal individually, and then drives the laser transmitter to emit a high-power laser encoding signal after passing through the amplifier in sequence. The normality of the corresponding decoding control branch is determined by whether the LED of the alignment display module of the corresponding decoding control branch in the receiving sensing module emits light.

[0020] 4) Disconnect the power supply to the receiving control unit to put it in a non-working state; for each normal decoding control branch, connect the control connector K1 of its control and display circuit to the fireworks ignition head connector;

[0021] 5) Turn on the power to the receiving control unit to put it into operation; control the designated encoding branch in the aiming and transmitting unit to send a high-power laser encoding signal, so that the corresponding decoding control branch works, and connects the fireworks circuit connected to the control connector K1 of its control and display circuit to realize the long-distance safe ignition control of the fireworks.

[0022] Compared with the prior art, the present invention has the following advantages:

[0023] 1. This invention includes an alignment and transmission unit and a receiving and control unit. The alignment and transmission unit includes an alignment module, a high-power laser encoded signal transmission module, and a beam shaping and expanding module. The alignment module and the high-power laser encoded signal transmission module are fixedly connected. The beam shaping and expanding module is installed on the output optical path of the high-power laser encoded signal transmission module. The receiving and control unit includes a receiving sensing module and a decoding control module connected to each other. The decoding control module has one or more control connectors for igniting fireworks. Therefore, the high-power laser encoded signal can be transmitted through the high-power laser encoded signal transmission module. Combining the characteristics of concentrated laser signal energy and good directionality, sufficient optical power density can still be maintained at a distance of more than km after passing through the beam shaping and expanding module, ensuring that the control signal receiving sensor can be excited to generate a response. After decoding and amplification, the control device is triggered to realize the safe control of fireworks display. It has the advantages of control distance of more than km, simple and convenient installation, strong anti-interference ability, and very high safety.

[0024] 2. The decoding control module of the present invention has one or more control connectors for igniting fireworks, thus enabling a single light source to control one or more fireworks displays; especially when controlling multiple fireworks displays, by adopting a single-point to multi-point control method to control multiple fireworks displays with a single laser light source, the signal source device is simplified and the equipment cost is reduced.

[0025] 3. This invention uses laser signals and does not require long-distance wiring. It can easily cross obstacles such as green belts, ditches, pits, and rivers in the signal channel, saving a lot of manpower, material resources, and financial resources. It not only greatly reduces costs but is also convenient to use. Furthermore, it is not affected by aging lines or construction factors in the signal channel, thus improving practicality, stability, and reliability.

[0026] 4. This invention utilizes the advantage that laser signals are not affected by external electromagnetic radiation signals, overcoming the problem that commonly used electronic remote control technology is easily affected by electromagnetic radiation signals from the surrounding environment. Therefore, it has strong anti-interference ability, good security, and high confidentiality. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the device according to an embodiment of the present invention.

[0028] Figure 2 This is a schematic diagram of the encoder frame structure in an embodiment of the present invention.

[0029] Figure 3 This is a schematic diagram of the optical path layout structure of the beam shaping and expanding module in an embodiment of the present invention.

[0030] Figure 4 This is a schematic diagram of the frame structure of the receiving control unit in an embodiment of the present invention.

[0031] Figure 5 This is a schematic diagram of the planar layout structure of the receiving sensing module in an embodiment of the present invention.

[0032] Figure 6 This is a schematic diagram of the circuit principle of the alignment signal sensing module and the alignment display module in an embodiment of the present invention.

[0033] Figure 7 This is a schematic diagram of one implementation circuit of the control and display circuit in an embodiment of the present invention.

[0034] Figure 8 This is a schematic diagram of another implementation circuit of the control and display circuit in an embodiment of the present invention.

[0035] Legend: 1. Alignment transmitting unit; 11. Alignment module; 12. High-power laser encoded signal transmitting module; 121. Encoder; 1211. Encoding circuit; 1212. Encoding switch; 122. Amplifier; 123. Laser transmitter; 124. Alignment laser signal driving source; 13. Beam shaping and beam expanding module; 131. Beam shaping lens; 132. First beam expanding lens; 133. Second beam expanding lens; 2. Receiver control unit; 21. Receiver sensing module; 211. Control signal receiving sensing module; 212. Alignment signal sensing module; 213. Alignment display module; 22. Decoding control module; 221. Decoding circuit; 222. Amplifier circuit; 223. Control and display circuit. Detailed Implementation

[0036] like Figure 1 As shown, the km-level long-distance fireworks safety control device of this embodiment includes an alignment and transmission unit 1 and a receiving and control unit 2. The alignment and transmission unit 1 includes an alignment module 11, a high-power laser encoded signal transmission module 12, and a beam shaping and expanding module 13. The alignment module 11 and the high-power laser encoded signal transmission module 12 are fixedly connected. The beam shaping and expanding module 13 is installed on the output optical path of the high-power laser encoded signal transmission module 12. The receiving and control unit 2 includes a receiving sensing module 21 and a decoding control module 22 connected to each other. The decoding control module 22 has one or more control connectors for igniting fireworks. The km-level long-distance fireworks safety control device of this embodiment can send encoded high-power laser encoded signals through the high-power laser encoded signal transmission module. Combining the characteristics of concentrated laser signal energy and good directionality, after passing through the beam shaping and expanding module, it can still maintain sufficient optical power density at a distance of more than km, ensuring that the control signal receiving sensor can be excited to generate a response. Then, after decoding and amplification, the control device is triggered to realize the safe control of fireworks. It has the advantages of control distance of more than km, simple and convenient installation, strong anti-interference ability, and very high safety.

[0037] The alignment module 11 is used to align the high-power laser encoded signal transmitting module 12 and the receiving sensing module 21. The alignment module 11 can be an adjustment platform with X, Y, Z degrees of freedom adjustment or X, Y degrees of freedom adjustment as needed, and can be further equipped with a telescope. For ease of alignment, in this embodiment, the alignment module 11 is elongated, and the alignment module 11 and the high-power laser encoded signal transmitting module 12 are placed adjacent to each other and parallel to each other.

[0038] like Figure 1As shown, in this embodiment, the high-power laser encoded signal transmitting module 12 includes an encoder 121, an amplifier 122, a laser transmitter 123, and an alignment laser signal driving source 124. The amplifier 122 and the alignment laser signal driving source 124 are respectively connected to the control terminal of the laser transmitter 123, and the input terminal of the amplifier 122 is connected to the encoder 121. The encoder 121 and the amplifier 122 can drive the laser transmitter 123 to emit a high-power encoded signal, and the alignment laser signal driving source 124 can drive the laser transmitter 123 to emit an alignment laser signal, so as to facilitate alignment with the receiving control unit 2.

[0039] like Figure 2 As shown, in this embodiment, the encoder 121 includes multiple parallel-connected encoding branches (at least one encoding branch can be used). Each encoding branch includes a serially connected encoding circuit 1211 and an encoding switch 1212. The output of the encoding circuit 1211 is connected to the input of the amplifier 122 through the encoding switch 1212. As an optional implementation, in this embodiment, the encoder 121 includes n parallel-connected encoding branches. Each encoding branch is used to control a control connector for igniting fireworks. Undoubtedly, to ensure safety, there should be a one-to-one mapping relationship between the encoding signals and the control connectors. However, n parallel-connected encoding branches can generate far more than n encoding signals. Therefore, by controlling the on / off state of the encoding switch 1212, different encoding signals can be selected and combined, thereby generating more encoding signals, preventing crosstalk of the laser encoding signals, and ensuring the safety of fireworks display.

[0040] like Figure 3 As shown, in this embodiment, the beam shaping and expanding module 13 includes a beam shaping lens 131, a first beam expanding lens 132, and a second beam expanding lens 133 arranged sequentially along the optical axis, so that the laser signal emitted by the laser emitter 123 becomes a laser signal with a circular cross-section and an enlarged area after passing through the beam shaping lens 131, the first beam expanding lens 132, and the second beam expanding lens 133, and can cover the receiving surface aligned with the receiving sensing module 21 when it irradiates the receiving sensing module 21.

[0041] like Figure 4 As shown, in this embodiment, the receiving sensing module 21 includes a control signal receiving sensing module 211 and an alignment signal sensing module 212. The output of the control signal receiving sensing module 211 is connected to the decoding control module 22, and the alignment signal sensing module 212 is connected to a corresponding alignment display module 213. After receiving a signal, the control signal receiving sensing module 211 generates a corresponding coded current signal. The coded current signal is decoded and amplified by the decoding control module 22 to control the fireworks, thereby ensuring the high safety of the controlled device and having the advantages of long control distance and strong anti-interference ability.

[0042] like Figure 5 As shown, in this embodiment, the receiving sensing module 21 has a receiving surface for receiving signals. Three concentric circles are arranged on the receiving surface. Multiple control signal receiving sensing modules 211 are arranged in the innermost concentric circle. Multiple alignment signal sensing modules 212 are evenly distributed on the inner annular band formed by the three concentric circles. Alignment display modules 213 are evenly distributed on the outer annular band formed by the three concentric circles and located outside the corresponding alignment signal sensing modules 212. With this arrangement, when the laser signal emitted by the beam shaping and expanding module 13, with a circular cross-section and enlarged area, is aligned with and covers the alignment signal sensing modules 212 on the inner annular band, it ensures that it can cover the control signal receiving sensing modules 211 arranged in the innermost concentric circles, ensuring that each control signal receiving sensing module 211 can work normally, thus achieving reliable control of multiple fireworks. Furthermore, the alignment display modules 213, evenly distributed on the outer annular band formed by the three concentric circles and located outside the corresponding alignment signal sensing modules 212, facilitate observation of the alignment coverage status. If the alignment display module 213 is fully lit, it indicates that alignment and coverage have been achieved. If some of the modules are not lit, it means that some of the control signal receiving and sensing modules 211 are not working properly. In this case, the alignment module 11 should be adjusted towards the side of the unlit alignment display module 213 until the alignment display module 213 is fully lit. Therefore, through the above-described layout structure of the receiving and sensing module 21, convenient, fast, and accurate long-distance alignment can be achieved, making the overall device easy to use, highly practical, and reliable.

[0043] It should be noted that the number of control signal receiving sensing modules 211 and the number of alignment signal sensing modules 212 can be arranged according to actual needs. For example, regarding the number of alignment signal sensing modules 212, see [link to relevant documentation]. Figure 5 In this embodiment, there are 6 alignment signal sensing modules 212, which are evenly arranged around the center of the circle on the inner annular band formed by three concentric circles at 60-degree intervals. Similarly, there are 6 alignment display modules 213, which are evenly distributed on the outer annular band formed by three concentric circles and located outside the corresponding alignment signal sensing module 212.

[0044] like Figure 6 As shown, in this embodiment, the alignment signal sensing module 212 includes a photodiode D1 and a resistor R1 connected in series. The photodiode D1 and the resistor R1 are connected in series to the power supply. The alignment display module 213 includes a transistor Q1, a transistor Q2, a resistor R2, and a light-emitting diode D2. The base of the transistor Q1 is connected to the intermediate node between the photodiode D1 and the resistor R1. The transistors Q1 and Q2 are cascaded to form a first and second stage amplifier circuit. The resistor R2 and the light-emitting diode D2 are connected in series at the output terminal of the first and second stage amplifier circuit.

[0045] like Figure 4 As shown, in this embodiment, the decoding control module 22 includes multiple decoding control branches (which can be a single branch). Each decoding control branch includes a decoding circuit 221, an amplifier circuit 222, and a control and display circuit 223 connected in sequence. The decoding circuit 221 is connected to the output terminal of the receiving sensor module 21, and the control and display circuit 223 has a control connector for igniting fireworks. Each decoding circuit 221 can correctly decode a laser-encoded signal. If the decoding is successful, the current signal generated by the decoding is amplified by the first amplifier circuit 222 and then controlled by the control and display circuit 223 to activate the corresponding fireworks. For example, the control and display circuit 223 of the first decoding control branch controls the first fireworks, the control and display circuit 223 of the second decoding control branch controls the second fireworks, and so on, until the control and display circuit 223 of the nth decoding control branch controls the nth fireworks. Therefore, single-point to multi-point control can be achieved, using a single laser light source to control the safe ignition of multiple fireworks, reducing costs and improving safety.

[0046] like Figure 7 As shown, in one optional implementation, the control and display circuit 223 includes transistor Q3, transistor Q4, resistor R3, light-emitting diode D3, and control connector K1 for igniting fireworks. The base of transistor Q3 is connected to the output terminal of amplifier circuit 222. Transistors Q3 and Q4 are cascaded to form a second-stage amplifier circuit. Control connector K1 is connected in parallel at the output terminal of the second-stage amplifier circuit. Resistor R3 and light-emitting diode D3 are connected in series and then connected in parallel with control connector K1. See also Figure 7 In this circuit, the emitter of NPN transistor Q3 is connected to the negative terminal of the power supply, and its collector is connected to the base of PNP transistor Q4. The emitter of transistor Q4 is connected to the positive terminal of the power supply, and its collector is connected to the negative terminal of the power supply via control connector K1. When the signal from amplifier circuit 222 is sent to the base of transistor Q3, the second-stage amplifier circuit formed by the cascaded transistors Q3 and Q4 is turned on, igniting the first-stage firework connected to control connector K1. Simultaneously, LED D3 illuminates, indicating successful control in real time. LED D3 not only displays the control status but also serves to detect system malfunction during the device preparation phase, ensuring the reliability and stability of the device.

[0047] like Figure 8As shown, in another optional implementation, the control and display circuit 223 includes an optocoupler switch U1, a resistor R4, a light-emitting diode D4, and a control connector K1 for igniting fireworks. The first circuit on one side of the optocoupler switch U1 is connected to the output terminal of the amplifier circuit 222. The control connector K1 is connected in series in the second circuit on the other side of the optocoupler switch U1. The resistor R4 and the light-emitting diode D4 are connected in series and then connected in parallel with the control connector K1. See also... Figure 8 Pin 1 of the optocoupler switch U1 is connected to the output of amplifier circuit 222, pin 2 is connected to the negative terminal of the first power supply, pin 3 is connected to the negative terminal of the second power supply through control connector K1, and pin 4 is connected to the positive terminal of the second power supply. By using optocoupler switch U1, the control and display circuit 223 is electrically isolated from the controlled fireworks ignition circuit, preventing interference between the circuits and improving the reliability and stability of the device. After receiving the output signal from amplifier circuit 222, the optocoupler switch U1's built-in LED emits signal light, turning on control and display circuit 223, thereby turning on the fireworks ignition circuit connected to control connector K1, achieving safe control of fireworks display. Similarly, LED D4 not only displays the control status but also serves to detect whether the system is functioning correctly during the device preparation stage, ensuring the reliability and stability of the device.

[0048] This embodiment also provides an application method for the aforementioned km-level long-distance fireworks display safety control device, the steps of which include:

[0049] 1) Power on the receiving control unit 2 to put it into operation; since the aligning transmitting unit 1 did not emit a high-power laser encoding signal, the receiving control unit 2 did not receive a signal and did not generate a current signal, so all control connectors were in the disconnected state;

[0050] 2) First, the high-power laser encoding signal transmitting module 12 is aligned with the receiving surface of the receiving sensing module 21 by the alignment module 11 to complete the initial alignment; then, the laser transmitter 123 is controlled by the alignment laser signal driving source 124 to emit alignment laser signals, and the emission direction of the laser transmitter (123) is adjusted so that all the alignment display modules 213 in the receiving sensing module 21 are illuminated to complete the precise alignment.

[0051] 3) Press the encoding switch 1212 of each encoding branch in sequence, so that each encoding branch emits an encoding signal individually. After passing through the amplifier 122, the signal drives the laser transmitter 123 to emit a high-power laser encoding signal. The status of the corresponding decoding control branch is determined by whether the light-emitting diode of the alignment display module 213 of the corresponding decoding control branch in the receiving sensing module 21 is lit. After each control signal receiving sensing module 211 receives the high-power laser encoding signal, it outputs it to the corresponding decoding control branch in the decoding control module 22. The decoding circuit 221 of each decoding control branch performs decoding. If the decoding is successful, the current signal generated by the decoding is amplified by the first amplifier circuit 222 and turns on the control and display circuit 223 of the built-in light-emitting diode, indicating that the corresponding decoding is complete. Thus, the status of each encoding branch can be determined.

[0052] 4) Disconnect the power supply to the receiving control unit 2 so that the receiving control unit 2 is in a non-working state; for each normal decoding control branch, connect the control connector K1 of its control and display circuit 223 to the fireworks ignition head connector;

[0053] 5) Turn on the power supply of the receiving control unit 2 to make the receiving control unit 2 work; control the designated encoding branch in the aiming and transmitting unit 1 to send a high-power laser encoding signal, so that the corresponding decoding control branch works, and connects the fireworks circuit connected to the control connector K1 of its control and display circuit 223 to realize the long-distance safe ignition control of the fireworks.

[0054] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A safety control device for long-distance fireworks display at a range of km, characterized in that: The device includes an alignment and transmission unit (1) and a receiving and control unit (2). The alignment and transmission unit (1) includes an alignment module (11), a high-power laser coded signal transmission module (12), and a beam shaping and expanding module (13). The alignment module (11) and the high-power laser coded signal transmission module (12) are fixedly connected. The beam shaping and expanding module (13) is installed on the output optical path of the high-power laser coded signal transmission module (12). The receiving and control unit (2) includes a receiving sensing module (21) and a decoding control module (22) that are connected to each other. The decoding control module (22) has one or more control connectors for igniting fireworks. The alignment module (11) is used to align the high-power laser coded signal transmitting module (12) and the receiving sensing module (21). The alignment module (11) adopts an adjustment platform with X, Y, Z degree of freedom adjustment or X, Y degree of freedom adjustment and is equipped with a telescope. The beam shaping and expanding module (13) includes a beam shaping lens (131), a first beam expanding lens (132) and a second beam expanding lens (133) arranged sequentially along the optical axis, so that the laser signal emitted by the laser transmitter (123) becomes a circular cross-section after passing through the beam shaping lens (131), the first beam expanding lens (132) and the second beam expanding lens (133). The laser signal is enlarged in shape and area; the receiving sensing module (21) includes a control signal receiving sensing module (211) and an alignment signal sensing module (212). The output of the control signal receiving sensing module (211) is connected to the decoding control module (22), and the alignment signal sensing module (212) is connected to a corresponding alignment display module (213); the receiving sensing module (21) has a receiving surface for receiving signals, and the receiving surface is provided with three concentric circles. The number of control signal receiving sensing modules (211) is multiple and they are respectively arranged in the innermost concentric circle. The number of alignment signal sensing modules (212) is multiple and they are respectively arranged in the innermost concentric circle. The number of alignment display modules (213) is multiple and evenly distributed on the inner annular band formed by three concentric circles. The alignment display modules (213) are evenly distributed on the outer annular band formed by three concentric circles and located outside the corresponding alignment signal sensing modules (212). The high-power laser encoding signal transmitting module (12) includes an encoder (121), an amplifier (122), a laser transmitter (123), and an alignment laser signal driving source (124). The amplifier (122) and the alignment laser signal driving source (124) are respectively connected to the control terminal of the laser transmitter (123). The input terminal of the amplifier (122) is connected to the encoder (121).

2. The km-level long-distance fireworks display safety control device according to claim 1, characterized in that: The encoder (121) includes one or more parallel-connected encoding branches, each encoding branch including a serially connected encoding circuit (1211) and encoding switch (1212). The output of the encoding circuit (1211) is connected to the input of the amplifier (122) through the encoding switch (1212). The decoding control module (22) includes one or more decoding control branches, each decoding control branch including a decoding circuit (221), an amplifier circuit (222), and a control and display circuit (223) connected in sequence. The decoding circuit (221) is connected to the output of the receiving sensing module (21), and the control and display circuit (223) has a control connector for igniting fireworks.

3. The km-level long-distance fireworks display safety control device according to claim 1, characterized in that: The alignment signal sensing module (212) includes a photodiode D1 and a resistor R1 connected in series. The photodiode D1 and the resistor R1 are connected in series to the power supply. The alignment display module (213) includes a transistor Q1, a transistor Q2, a resistor R2 and a light-emitting diode D2. The base of the transistor Q1 is connected to the intermediate node between the photodiode D1 and the resistor R1. The transistors Q1 and Q2 are cascaded to form a first and second stage amplifier circuit. The resistor R2 and the light-emitting diode D2 are connected in series at the output terminal of the first and second stage amplifier circuit.

4. The km-level long-distance fireworks display safety control device according to claim 2, characterized in that: The control and display circuit (223) includes transistor Q3, transistor Q4, resistor R3, light-emitting diode D3, and control connector K1 for igniting fireworks. The base of transistor Q3 is connected to the output terminal of amplifier circuit (222). Transistor Q3 and transistor Q4 are cascaded to form a second secondary amplifier circuit. The control connector K1 is arranged in parallel at the output terminal of the second secondary amplifier circuit. Resistor R3 and light-emitting diode D3 are connected in series and then connected in parallel with control connector K1.

5. The km-level long-distance fireworks display safety control device according to claim 2, characterized in that: The control and display circuit (223) includes an optocoupler switch U1, a resistor R4, a light-emitting diode D4, and a control connector K1 for igniting fireworks. The first circuit on one side of the optocoupler switch U1 is connected to the output terminal of the amplifier circuit (222). The control connector K1 is connected in series on the second circuit on the other side of the optocoupler switch U1. The resistor R4 and the light-emitting diode D4 are connected in series and then connected in parallel with the control connector K1.

6. A method for applying the km-level long-distance fireworks display safety control device as described in claim 2, characterized in that, include: 1) Turn on the power to the receiving control unit (2) so that the receiving control unit (2) is in working state; 2) First, the high-power laser encoding signal transmitting module (12) is aligned with the receiving surface of the receiving sensing module (21) through the alignment module (11) to complete the initial alignment; then, the laser transmitter (123) is controlled by the alignment laser signal driving source (124) to emit the alignment laser signal, and the emission direction of the laser transmitter (123) is adjusted so that all the alignment display modules (213) in the receiving sensing module (21) are lit, thus completing the precise alignment; 3) Press the encoding switch (1212) of each encoding branch in sequence so that each encoding branch emits an encoding signal individually, and drives the laser transmitter (123) to emit a high-power laser encoding signal after passing through the amplifier (122). The normality of the corresponding decoding control branch is determined by whether the light-emitting diode of the alignment display module (213) of the corresponding decoding control branch in the receiving sensing module (21) emits light. 4) Disconnect the power supply to the receiving control unit (2) so that the receiving control unit (2) is in a non-working state; for each normal decoding control branch, connect the control connector K1 of its control and display circuit (223) to the fireworks ignition head connector; 5) Turn on the power supply of the receiving control unit (2) so that the receiving control unit (2) is in working state; control the designated encoding branch in the aligning and transmitting unit (1) to send a high-power laser encoding signal so that the corresponding decoding control branch works and connects the fireworks circuit connected to the control connector K1 of its control and display circuit (223) to realize the long-distance safe ignition control of the fireworks.

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