Anti-interference multichannel optoelectronic isolation trigger for pulse power system

Abstract

The invention provides an anti-interference multichannel optoelectronic isolation trigger for a pulse power system, and relates to the technical field of pulse power. The invention provides an anti-interference multi-channel photoelectric isolation trigger for a pulse power system. The anti-interference multi-channel photoelectric isolation trigger comprises a multi-channel electricity-to-light device and a plurality of light-to-electricity devices, wherein the multi-channel electricity-to-light device and the plurality of light-to-electricity devices are placed in two independent cavities; the multi-channel electricity-to-light conversion device comprises an electricity-to-light conversion module. The light-to-electricity device comprises a totally-enclosed light-to-electricity shielding shell, and a light-to-electricity module is arranged in an inner cavity of the light-to-electricity shielding shell; the electricity-to-light module is used for converting an electric signal of external equipment into a light signal, and the light signal is transmitted to the light-to-electricity circuit through an optical fiber; the light-to-electricity circuit is used for converting light signals into electric signals, and the electric signals converted by the light-to-electricity circuit are used for triggering external diagnostic equipment. The device is suitable for photoelectric conversion triggering application in a strong electromagnetic environment, and the characteristics of low jitter and high precision of multiple paths of triggering signals are realized.

Description

Technical Field

[0001] This invention relates to the field of pulse power technology, and in particular to an anti-interference multi-channel opto-isolated trigger for pulse power systems. Background Technology

[0002] Magnetized inertial fusion (MIF), as a key technological path for controlled nuclear fusion energy, has achieved significant breakthroughs in physics experiments and engineering applications in recent years. The HiBG1 platform, as an important device for MIF research, requires its pulsed power system to precisely output hundreds of kiloamperes of current within tens of microseconds. This high-power, short-pulse operation mode generates extremely strong transient electromagnetic fields and a high-energy radiation environment. These strong interferences intrude into the trigger control system through space radiation and conductive coupling via equipment cables, causing synchronization signal timing jitter or pulse distortion, thereby disrupting the consistency of multi-path triggering and ultimately affecting the accuracy of experimental data acquisition and system reliability.

[0003] Currently, commercially available triggers (such as the DG645) generally use copper cables to transmit electrical trigger signals. While this method is simple in structure, it is highly susceptible to ground loop currents and common-mode noise interference. Experimental data shows that at the moment of firing the HiBG1, the intruding strong electromagnetic interference signal often exceeds the trigger threshold, causing diagnostic equipment to be falsely triggered (prematurely activated). To address this issue, the industry has developed opto-isolated triggering technology, the core of which is to convert electrical signals into optical signals for transmission and then convert them back into electrical signals at the controlled end. However, even with physical fiber optic isolation between the laboratory and the shielded room, insufficient electromagnetic shielding of the opto-conversion module often leads to electromagnetic gap resonance at metal interfaces, connectors, and other locations, causing interference to the internal circuitry and affecting the stability and reliability of the trigger signal. Summary of the Invention

[0004] To address the problem of electromagnetic interference coupling of trigger signals in existing technologies, this invention provides an anti-interference multi-channel opto-isolated trigger for pulse power systems, which is suitable for opto-conversion triggering applications in strong electromagnetic environments and achieves low jitter and high precision characteristics for multiple trigger signals.

[0005] The present invention provides an anti-interference multi-channel opto-isolated trigger for pulse power systems, comprising a multi-channel electro-optical converter and multiple opto-electric converters for placement in two independent chambers; the multi-channel electro-optical converter includes an electro-optical module; the opto-electric converter includes a fully enclosed opto-electrical shielded shell, and the opto-electrical module is disposed in the inner cavity of the opto-electrical shielded shell; the electro-optical module is used to convert electrical signals from external devices into optical signals, and the optical signals are transmitted to the opto-electrical circuit through optical fibers; the opto-electrical circuit is used to convert the optical signals into electrical signals, and the electrical signals converted by the opto-electrical circuit are used to trigger external diagnostic equipment.

[0006] In one specific embodiment, the multi-channel electro-optical conversion device further includes an electro-optical shielding shell, and the electro-optical module is located in the inner cavity of the electro-optical shielding shell; and / or, the material of the optical-to-electric shielding shell is aluminum alloy.

[0007] In one specific embodiment, the electro-optical module includes multiple BNC radio frequency input interfaces, which are located in the side wall of the electro-optical shielding housing and are used to connect to electrical signals from external devices.

[0008] In one specific embodiment, the electro-optical module includes multiple ST fiber optic output interfaces, which are located in the side wall of the electro-optical shielding shell. The ST fiber optic output interfaces are used to transmit the optical signal converted by the electro-optical module to the optical fiber.

[0009] In one specific embodiment, the electro-optical module incorporates multiple parallel inverter circuits, each of which is used to convert one electrical signal into an optical signal.

[0010] In one specific embodiment, the electro-optical module includes a power interface for connecting to an external power supply; the electro-optical module has a built-in step-down circuit for stepping down the external power supply and providing the stepped-down voltage to the electro-optical module.

[0011] In one specific embodiment, the optical-to-electric module includes an ST fiber optic input interface and a buffer. The ST fiber optic input interface is located in the side wall of the optical-to-electric shielded housing and is used to receive optical signals transmitted through the optical fiber. The buffer is used to output electrical signals to external diagnostic equipment.

[0012] In one specific embodiment, the optical-to-electric module further includes a BNC RF output interface and an SMA RF interface. The SMA RF interface is used to convert the electrical signal output by the buffer, and the BNC RF output interface is used to output the electrical signal converted by the SMA RF interface to an external diagnostic device. The BNC RF output interface is located in the side wall of the optical-to-electric shielded housing.

[0013] In one specific embodiment, the optical-to-electric module has a built-in power management circuit, which includes a power supply for supplying power to the optical-to-electric module. The side wall of the optical-to-electric shielding shell is provided with a charging interface, a display panel, a self-locking switch, and a self-rebound switch. The charging interface is used to connect an external power supply to the power supply, the display panel is used to display the power level of the power supply, the self-locking switch is used to control the power supply of the optical-to-electric module, and the self-rebound switch is used to trigger the display panel.

[0014] In one specific embodiment, the power management circuit further includes a power management IC and a power protection IC; the power management IC is used to manage the energy control of the power supply, and the power protection IC is used to prevent power supply overvoltage.

[0015] The anti-interference multi-channel opto-isolated trigger for pulse power systems provided by this invention has the following advantages: This invention is suitable for opto-conversion triggering applications in strong electromagnetic environments. Its design employs techniques such as fiber optic signal transmission, electro-optical shielding, optical-electrical shielding, and independent battery power supply, effectively improving the anti-interference capability and operational reliability of the channel opto-conversion trigger in strong electromagnetic environments. Furthermore, by selecting high-performance opto-conversion devices, such as the industrial-grade HFBR series, and integrating a clock chip, low jitter and high precision characteristics of the multi-channel trigger signals are achieved. Attached Figure Description

[0016] Figure 1 This is a flowchart of the present invention.

[0017] Figure 2 This is a front view of the electro-optical conversion module in this invention.

[0018] Figure 3 This is a cross-sectional view of the electro-optical conversion module in this invention.

[0019] Figure 4 This is a schematic diagram of the structure of the optical-to-electric shielding shell in this invention.

[0020] Figure 5 This is a schematic diagram of the structure of the optical-to-electric shielding shell in this invention with the top shell removed.

[0021] Figure 6 This is a cross-sectional view of the photoelectric shielding shell in this invention.

[0022] Figure 7 This is a functional circuit diagram of the electro-optical module in this invention.

[0023] Figure 8 This is a functional circuit diagram of the photoelectric conversion module in this invention.

[0024] Figure 9 The raw data for the trigger signal.

[0025] Figure 10 This invention addresses the inter-channel delay when using an anti-interference multi-channel opto-isolation trigger for pulse power systems.

[0026] Figure 11 The rise time of the trigger signal is specified when using the anti-interference multi-channel opto-isolated trigger for pulse power systems provided by this invention.

[0027] Figure Labels

[0028] Multi-channel electro-optical conversion device 1 Electro-optical shielding shell 11 Electro-optical module 12 BNC RF input interface 13 ST Fiber Optic Output Interface 14 Photoelectric conversion device 2 Optical-to-electric shielding shell 21 Optical to electrical module 22 BNC RF output interface 23 ST Fiber Optic Input Interface 24 Power supply 25 Charging port 26 Display panel 27 Self-locking switch 28 29 Self-rebound switch Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. In the description of the present invention, it should be noted that the terms "left side", "right side", "upper side", "lower side", "above", "below", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0031] Furthermore, in the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0032] This invention provides an anti-interference multi-channel opto-isolated trigger for pulse power systems, such as... Figure 1 As shown, it includes a multi-channel electro-optical conversion device 1 and multiple optical-to-electrical conversion devices 2 for placement in two independent chambers. Specifically, the multi-channel electro-optical conversion device 1 can be placed in a shielded room, and the optical-to-electrical conversion devices 2 can be placed in a laboratory. The shielded room and the laboratory are two mutually isolated chambers sharing the same side wall, which is equipped with a shielded waveguide. The shielded waveguide is used to allow optical fibers to pass through and to prevent electromagnetic interference between the shielded room and the laboratory. Figure 2 and Figure 3 As shown, the multi-channel electro-optical converter 1 includes an electro-optical module 12, and the optical-to-electrical converter 2 includes a fully enclosed optical-to-electrical shielded housing 21. An optical-to-electrical module 22 is disposed within the inner cavity of the optical-to-electrical shielded housing 21. The electro-optical module 12 converts electrical signals (trigger signals) from external devices into optical signals, which are then transmitted to the optical-to-electrical module 22 via optical fiber. The optical-to-electrical module 22 converts the optical signals back into electrical signals (trigger signals). The electrical signals (trigger signals) converted by the optical-to-electrical module 22 are used to trigger external diagnostic devices. Generally, the number of external diagnostic devices is the same as the number of optical-to-electrical converters 2. Each optical-to-electrical converter 2 is used to trigger one external diagnostic device. External diagnostic devices typically have high requirements for signal delay.

[0033] In one specific embodiment, such as Figure 2 As shown, the multi-channel electro-optical converter 1 is configured as a three-layer structure according to the reserved space. Alternatively, it can be configured as a 19-inch rack-mount type with a 2U height.

[0034] In the anti-interference multi-channel opto-isolation trigger provided in the embodiments of the present invention, such as Figure 2 and Figure 3 As shown, the multi-channel electro-optical conversion device 1 further includes an electro-optical conversion shielding shell 11, and the electro-optical conversion module 12 is located inside the electro-optical conversion shielding shell 11. Specifically, the material of the electro-optical conversion shielding shell 11 can be prepared by additive manufacturing technology.

[0035] In one specific embodiment, the optical-to-electric shielding shell 21 is made of aluminum alloy. Aluminum alloy offers advantages such as lower cost, lighter weight, and easier processing, while achieving sufficient shielding effect. Specifically, the use of aluminum alloy material is closely related to the skin depth, which is the depth at which the current density decays to 1 / e (approximately 37%) of the current density at the conductor surface. A smaller skin depth means that the current is more concentrated on the surface, resulting in better shielding of the internal space. Different materials have different degrees of electromagnetic shielding effect. It operates in an electromagnetic interference (EMI) environment with a frequency range of approximately 100 kHz to 1 MHz. According to the skin effect formula:

[0036] in, To reach skin depth, The angular frequency of the electromagnetic wave. The material's magnetic permeability, The value represents the electrical conductivity of the material. In one specific embodiment, a 2mm thick aluminum alloy (6061) is selected as the electromagnetic shielding layer. Aluminum alloy is a non-ferromagnetic material, and its relative permeability is... Its absolute permeability .in, This is the vacuum permeability. The conductivity of aluminum alloy is 40% of that of copper, therefore = 0.4 * 5.8 × 10⁻⁶. 7 = 2.32 × 10 7 S / m. The calculated value is approximately 0.33 mm. In engineering practice, the thickness t must meet the requirement of "thickness t ≥ 3~5δ" (to ensure absorption attenuation ≥ 20 dB and shielding effect meets the standard).

[0037] In the anti-interference multi-channel opto-isolation trigger provided in the embodiments of the present invention, such as Figure 2 and Figure 3 As shown, the electro-optical module 12 includes multiple BNC radio frequency input interfaces 13, which are located in the side wall of the electro-optical shielding housing 11. The BNC radio frequency input interfaces 13 are used to connect to electrical signals (trigger signals) from external devices. Specifically, a rubber gasket is provided between the BNC radio frequency input interface 13 and the side wall of the electro-optical shielding housing 11. The rubber gasket forms a complete electromagnetic shielding layer with the electro-optical shielding housing 11, preventing electromagnetic interference from coupling into the inner cavity of the electro-optical shielding housing 11.

[0038] In the anti-interference multi-channel opto-isolation trigger provided in the embodiments of the present invention, such as Figure 2 and Figure 3 As shown, the electro-optical module 12 includes multiple ST fiber optic output interfaces 14, which are located in the side wall of the electro-optical shielding housing 11. The ST fiber optic output interfaces 14 are used to transmit the optical signals converted by the electro-optical module 12 to the optical fiber. Specifically, a rubber gasket is provided between the ST fiber optic output interface 14 and the side wall of the electro-optical shielding housing 11. The ST fiber optic output interface 14 can be a Broadcom / Avago HFBR-1414TZ. The rubber gasket can form a complete electromagnetic shielding layer with the electro-optical shielding housing 11, preventing electromagnetic interference from coupling into the inner cavity of the electro-optical shielding housing 11.

[0039] In the anti-interference multi-channel opto-isolation trigger provided in the embodiments of the present invention, such as Figure 2 , Figure 3 and Figure 7 As shown, the electro-optical module 12 incorporates multiple parallel inverter circuits, each used to convert one electrical signal into an optical signal. Specifically, the inverter circuit stabilizes the electrical signal (trigger signal) input from external devices, typically employing TTL NAND gate circuits to regulate or amplify the electrical signal (trigger signal) to a 5V output. Further, the electro-optical module 12 includes a power interface for connecting to an external power supply; it also includes a step-down circuit to reduce the voltage of the external power supply and supply power to the module. For illustration, each channel is equipped with an SN74ACT00DR chip as a primary clock buffer to improve driving capability and amplify weak clock signals. Even if the input clock signal edges are not steep enough, after passing through the switching threshold of the logic gates, the output clock signal will have cleaner, steeper rising and falling edges.

[0040] Specifically, the signal flow involved in converting an electrical signal (trigger signal) into an optical signal is as follows: the electrical signal (trigger signal) is connected to the inverter circuit through the BNC RF input connector. After the inverter circuit stabilizes the electrical signal (trigger signal), it transmits the electrical signal (trigger signal) to the ST fiber optic output interface 14. The ST fiber optic output interface 14 converts the electrical signal (trigger signal) into an optical signal, and then transmits the optical signal to the optical-to-electric module 22 through the optical fiber.

[0041] In the anti-interference multi-channel opto-isolation trigger provided in the embodiments of the present invention, such as Figure 2 and Figure 3 As shown, the electro-optical module 12 includes a power interface for connecting to an external power supply; the electro-optical module 12 has a built-in step-down circuit for stepping down the external power supply and providing the stepped-down voltage to the electro-optical module 12.

[0042] In the anti-interference multi-channel opto-isolation trigger provided in the embodiments of the present invention, such as Figure 5 , Figure 6 and Figure 8As shown, the optical-to-electric module 22 includes an ST fiber optic input interface 24 and a buffer. The ST fiber optic input interface 24 is located in the side wall of the optical-to-electric shielding housing 21 and is used to receive optical signals transmitted through the optical fiber. The ST fiber optic output interface 14 can be a Broadcom / Avago HFBR-2412TZ. The buffer is used to output electrical signals to external diagnostic equipment. The buffer, which can be an LMK1C1104A buffer chip, is used to buffer and drive the electrical signals to enhance the signal driving capability, reduce attenuation and distortion during signal transmission, ensure stable transmission of high-speed signals to subsequent circuits, and isolate the electrical signals (trigger signals) input to the buffer and output from the buffer.

[0043] In the anti-interference multi-channel opto-isolation trigger provided in the embodiments of the present invention, such as Figure 5 , Figure 6 and Figure 8 As shown, the optical-to-electric module 22 also includes a BNC RF output interface 23 and an SMA RF interface. The SMA RF interface is used to transfer the electrical signal output by the buffer, and the BNC RF output interface 23 is used to output the electrical signal transferred by the SMA RF interface to an external diagnostic device. The BNC RF output interface 23 is located in the side wall of the optical-to-electric shielded housing 21.

[0044] Specifically, the signal flow involved in converting optical signals into electrical signals (trigger signals) is as follows: the optical signal transmitted from the optical fiber is converted into an electrical signal (trigger signal) by the ST optical fiber input interface 24, and then the electrical signal (trigger signal) is isolated by a buffer and transmitted to the SMA radio frequency interface. Through the SMA to BNC connection cable, the electrical signal (trigger signal) is transmitted to the BNC radio frequency output interface 23, and then transmitted to the external diagnostic equipment via the BNC radio frequency output interface 23.

[0045] In the anti-interference multi-channel opto-isolation trigger provided in the embodiments of the present invention, such as Figure 4 and Figure 5As shown, the photoelectric conversion module 22 has a built-in power management circuit, which includes a power supply 25 for supplying power to the photoelectric conversion module 22. The side wall of the photoelectric conversion shielding shell 21 is provided with a charging interface 26, a display panel 27, a self-locking switch 28, and a self-rebound switch 29. The charging interface 26 is used to connect external power to the power supply 25. The display panel 27 is used to display the power level of the power supply 25. The self-locking switch 28 is used to control the power supply 25 of the photoelectric conversion module 22. The self-rebound switch 29 is used to trigger the display panel 27. After triggering the self-rebound switch 29, it automatically turns off after a few seconds. When the self-rebound switch 29 is pressed, the internal chip detects a low level and analyzes it, driving the display panel 27 to display the power information.

[0046] Furthermore, the power management circuit also includes a power management IC and a power protection IC; the power management IC is used to manage the energy control of the power supply 25, and the power protection IC is used to prevent the power supply 25 from overvoltage.

[0047] Specifically, the power supply 25 uses four 5000mAh 21700 lithium batteries connected in parallel, with an output voltage of 4.2V; the power management IC uses an IP5356 chip, the power protection IC uses an XB8886 chip, the power supply 25 boost IC uses a TPS55340PWPR chip, the power supply 25 monitoring IC uses an IP5356 chip, the charging port is Type-C, and the display panel 27 uses a digital tube display. Additionally, a rotating cover is provided on the outer wall of the shielding shell to close the display panel 27, ensuring complete shielding performance while providing physical protection for the display panel 27.

[0048] Verification Example like Figure 9 As shown, the red line represents the photoelectric trigger signal with the electro-optical shielding shell 11 and the optical-electrical shielding shell 21 installed, the blue line represents the photoelectric trigger signal without the electro-optical shielding shell 11 and the optical-electrical shielding shell 21 installed, and the yellow line represents the original electrical trigger signal. Figure 10 The time delay of the trigger signal between two external trigger device channels is shown in the figure. The time delay between channels is within 3 ns. Figure 11 The rise time is displayed for channels 1 and 2. Channel 1 is the channel for the first external trigger device, and channel 2 is the channel for the second external trigger device. As shown in the figure, the current rise time jitter for channels 1 and 2 is as low as 100 ps.

[0049] This invention is applicable to photoelectric conversion triggering applications in strong electromagnetic environments. Its design employs techniques such as fiber optic signal transmission, electro-to-optical shielding housings, optical-to-electrical shielding housings, and independent battery power supply, effectively improving the anti-interference capability and operational reliability of the channel photoelectric conversion triggers in strong electromagnetic environments. Furthermore, by selecting high-performance photoelectric conversion devices, such as the industrial-grade HFBR series, and integrating a clock chip, low jitter and high precision characteristics of multi-channel trigger signals are achieved. The delay between multiple trigger channels is strictly controlled within 3 ns, while the channel rise edge jitter is as low as 100 ps, ​​ensuring the accuracy and stability of the trigger timing.

[0050] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. An anti-interference multi-channel opto-isolated trigger for pulse power systems, characterized in that: It includes a multi-channel electro-optical device (1) and multiple optical-electrical devices (2) for placement in two independent chambers; the multi-channel electro-optical device (1) includes an electro-optical module (12); the optical-electrical device (2) includes a fully enclosed optical-electrical shielding shell (21), and the optical-electrical module (22) is provided in the inner cavity of the optical-electrical shielding shell (21). The electro-optical module (12) is used to convert the electrical signal of the external device into an optical signal, and the optical signal is transmitted to the optical-to-electrical module (22) through an optical fiber; the optical-to-electrical module (22) is used to convert the optical signal into an electrical signal, and the electrical signal converted by the optical-to-electrical module (22) is used to trigger the external diagnostic device.

2. The anti-interference multi-channel opto-isolated trigger according to claim 1, characterized in that: The multi-channel electro-optical device (1) further includes an electro-optical shielding shell (11), and the electro-optical module (12) is located in the inner cavity of the electro-optical shielding shell (11); and / or, the material of the optical-to-electric shielding shell (21) is aluminum alloy.

3. The anti-interference multi-channel opto-isolation trigger according to claim 2, characterized in that: The electro-optical module (12) includes multiple BNC radio frequency input interfaces (13), which are located in the side wall of the electro-optical shielding shell (11). The BNC radio frequency input interfaces (13) are used to connect to the electrical signals of external devices.

4. The anti-interference multi-channel opto-isolated trigger according to claim 2, characterized in that: The electro-optical module (12) includes multiple ST fiber output interfaces (14), which are located in the side wall of the electro-optical shielding shell (11). The ST fiber output interfaces (14) are used to transmit the optical signals converted by the electro-optical module (12) to the optical fiber.

5. The anti-interference multi-channel opto-isolation trigger according to claim 1, characterized in that: The electro-optical module (12) has multiple parallel inverter circuits built in, each of which is used to convert one electrical signal into an optical signal.

6. The anti-interference multi-channel opto-isolated trigger according to claim 5, characterized in that: The electro-optical module (12) includes a power interface for connecting to an external power supply; the electro-optical module (12) has a built-in step-down circuit for stepping down the external power supply and providing the stepped-down voltage to the electro-optical module (12).

7. The anti-interference multi-channel opto-isolated trigger according to claim 1, characterized in that: The optical-to-electric module (22) includes an ST fiber optic input interface (24) and a buffer. The ST fiber optic input interface (24) is located in the side wall of the optical-to-electric shielded shell (21). The ST fiber optic input interface (24) is used to receive optical signals transmitted by optical fiber. The buffer is used to output electrical signals to external diagnostic equipment.

8. The anti-interference multi-channel opto-isolation trigger according to claim 7, characterized in that: The optical-to-electric module (22) also includes a BNC radio frequency output interface (23) and an SMA radio frequency interface. The SMA radio frequency interface is used to transfer the electrical signal output by the buffer, and the BNC radio frequency output interface (23) is used to output the electrical signal transferred by the SMA radio frequency interface to an external diagnostic device. The BNC radio frequency output interface (23) is located in the side wall of the optical-to-electric shielded shell (21).

9. The anti-interference multi-channel opto-isolated trigger according to claim 7, characterized in that: The photoelectric conversion module (22) has a built-in power management circuit, which includes a power supply (25) for supplying power to the photoelectric conversion module (22). The side wall of the photoelectric shielding shell (21) is provided with a charging interface (26), a display panel (27), a self-locking switch (28) and a self-rebound switch (29). The charging interface (26) is used to connect external power supply to the power supply (25). The display panel (27) is used to display the power of the power supply (25). The self-locking switch (28) is used to control the power supply (25) of the photoelectric module (22). The self-rebound switch (29) is used to trigger the display panel (27).

10. The anti-interference multi-channel opto-isolation trigger according to claim 9, characterized in that: The power management circuit also includes a power management IC and a power protection IC; the power management IC is used to manage the energy control of the power supply (25), and the power protection IC is used to prevent the power supply (25) from overvoltage.

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