Safe ignition device

Abstract

The invention relates to the technical field of meteorological rocket projectiles, and discloses a safety ignition device which comprises a safety read-write device connected with a monitoring terminal, a rocket projectile launching controller and an intelligent lock unit. The safe read-write device comprises a double-pole double-throw relay, and an interaction unit, a control unit and a constant-current communication unit which are connected in sequence, and the maximum output current of the constant-current communication unit is a fixed value, that is, when the output load resistance is 0 ohm, the maximum output current of the constant-current communication unit is the fixed value. The novel rocket projectile and the old rocket projectile are jointly deployed and launched, the constant-current communication unit of the device can provide high-precision maximum constant current, and high precision and stability are achieved; according to the safety ignition device, it is guaranteed that whether the output terminal of the lock control ignition channel is connected with a rocket projectile with a built-in intelligent lock unit or connected with a common rocket projectile, electric energy capable of exciting the rocket projectile to ignite cannot be provided, and therefore the safety ignition device has high fault tolerance, and the operation safety is effectively improved.

Description

Technical Field

[0001] This invention relates to the field of meteorological rocket technology, specifically a safety ignition device. Background Technology

[0002] During transportation and storage, weather rockets may experience increased resistance or open circuits in their ignition elements due to vibration and humidity. This can cause the rocket to remain in the chamber during launch. To prevent such malfunctions, a safe and effective test of the rocket's ignition element resistance is essential before loading. Because the resistance of the rocket's ignition element is relatively small, it can be ignited by applying a slightly stronger current within a certain timeframe. However, existing constant current sources typically output between 1-24mA and are not specifically designed for rocket ignition elements. Using excessively large currents to measure resistance presents challenges related to safety, reliability, measurement accuracy, and operational difficulty.

[0003] Furthermore, with the evolution of weather rockets, newer generations commonly incorporate smart lock chips for tracking rocket position, generating rocket identification codes, or monitoring internal data changes. The ignition system design must accommodate both new and older rockets lacking smart lock units. Ensuring safe ignition and preventing accidental triggering, while maintaining compatibility between both new and old rockets using a single, unified system would reduce equipment costs and lower the risk associated with rocket ignition. Therefore, we propose a safe ignition device. Summary of the Invention

[0004] The purpose of this invention is to provide a safe ignition device for the joint deployment and launch of new and old rockets. The constant current communication unit of this device can provide a high-precision constant current with high accuracy and stability. Especially when the output load is very small, the maximum output current of the ignition channel can be quickly limited to a fixed value to meet the inherent safety of the ignition device, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a safe ignition device, comprising a safe reading and writing device connected to a monitoring terminal, a rocket launch controller, and a smart lock unit, wherein the safe reading and writing device comprises a double-pole double-throw relay, and an interactive unit, a control unit, and a constant current communication unit with a fixed output current connected in sequence, wherein the interactive unit is connected to the monitoring terminal; The double-pole double-throw relay and the constant current communication unit constitute a lock-controlled ignition channel. The lock-controlled ignition channel is provided with at least two channels. The double-pole double-throw relay includes a relay drive component connected to the control unit, a common terminal COM connected to the smart lock unit, a normally closed contact NO connected to the transmitter controller, and a normally open contact NC connected to the constant current communication unit.

[0006] The constant current communication unit and the smart lock unit communicate bidirectionally without polarity.

[0007] Preferably, each of the locking ignition channels is provided with a signal acquisition terminal, and the control unit simultaneously controls the signal acquisition terminals on multiple locking ignition channels to output multiple different or the same level.

[0008] Preferably, the control unit controls the relay drive component to be energized, connecting the smart lock unit and the constant current communication unit; the control unit controls the relay drive component to be de-energized, connecting the smart lock unit and the transmitter controller; the safety ignition device is de-energized, connecting the smart lock unit and the transmitter controller.

[0009] Preferably, the rocket further includes an ignition element, which is electrically connected to a smart lock unit, and the smart lock unit controls the ignition element to be electrically connected to a launch controller.

[0010] Preferably, the constant current communication unit includes an operational amplifier and a MOSFET Q1. The positive input terminal of the operational amplifier is connected to the constant current control voltage at the rectifier line, the negative input terminal of the operational amplifier is connected to a feedback resistor R3, and the output terminal of the operational amplifier is connected to the gate of the MOSFET Q1.

[0011] Preferably, a current-limiting resistor R2 is connected between the drain of the MOS transistor Q1 and the input terminal b of the smart lock unit (5), a grounded current-limiting resistor R1 is connected to the source of the MOS transistor Q1, and the operating voltage VDD is connected to the input terminal c of the smart lock unit.

[0012] Preferably, the signal acquisition terminal of the lock-controlled ignition channel is connected between the current-limiting resistor R1 and the source of the MOS transistor Q1 to acquire the voltage value at the source of the MOS transistor Q1. The common connection point of the feedback resistor R3 and the current-limiting resistor R1 is connected to the signal acquisition terminal of the lock-controlled ignition channel to form a feedback loop to monitor the voltage value at the negative input terminal of the operational amplifier.

[0013] Preferably, when the signal acquisition terminal outputs a high level higher than the constant current control voltage, the MOSFET Q1 is turned off, and the input voltage of the smart lock unit approaches 0; conversely, when the signal acquisition terminal outputs a low level or is in a floating state, the MOSFET Q1 is turned on, and the input voltage of the smart lock unit approaches VDD; when the signal acquisition terminal is in the input state, the signal acquisition terminal is at a high level when the input terminals c and b of the smart lock unit are short-circuited, and at a low level when the input terminals c and b of the smart lock unit are open-circuited.

[0014] Preferably, the interaction unit includes an RS485 unit, an RS232 unit, a main processor, a WIFI unit, and a 4G unit, all of which are electrically connected to the main processor.

[0015] Preferably, the RS232 unit is a level interface and the RS485 unit is a differential interface. The level signal of the RS232 unit and the differential signal of the RS485 unit are both converted to TTL level for signal processing by the main processor.

[0016] Preferably, the WIFI unit includes a Wi-Fi chip, firmware storage, radio frequency front-end module, antenna, and a media access control layer, baseband processor, and radio frequency transceiver integrated on the Wi-Fi chip; the 4G unit includes a 4G chip, application processor, memory module, radio frequency module, and antenna interface.

[0017] Compared with the prior art, the beneficial effects of the present invention are: 1. The present invention uses a constant current of 0.1mA-3mA to detect the rocket ignition element, which can more effectively and safely avoid accidental ignition caused by excessive detection current; 2. The constant current communication unit of the present invention is provided with a feedback loop including a feedback resistor and a signal acquisition terminal. The feedback voltage is not affected by the system software, making the output voltage of the constant current communication unit safer, more stable and reliable. 3. The constant current communication unit of this invention is equipped with two sets of high-precision resistors for current limiting to ensure that the output current is safe, stable and accurate; by setting the current limiting resistors R2 and R1, the safety, stability and high accuracy of the small current constant current output of the constant current communication unit are further improved. 4. When the double-pole double-throw relay is activated, the constant current communication unit is connected to the output terminal of the lock-controlled ignition channel. Regardless of whether the output terminal of the relay is short-circuited or connected to the ignition element, the circuit current of the safety ignition device is limited to below 3mA. This ensures that the output terminal of the lock-controlled ignition channel cannot provide the electrical energy needed to ignite the rocket, whether it is connected to a rocket with a built-in intelligent lock unit or an ordinary rocket. This gives the safety ignition device high fault tolerance and effectively improves operational safety. Attached Figure Description

[0018] Figure 1 This is a structural block diagram of the present invention; Figure 2 This is the circuit diagram of the present invention.

[0019] In the diagram: 1. Interaction unit; 2. Control unit; 3. Constant current communication unit; 4. Double-pole double-throw relay; 41. Relay drive component; 5. Smart lock unit. Detailed Implementation

[0020] 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.

[0021] Please see Figure 1-2 The present invention provides a technical solution: a safe ignition device, including a safe reading and writing device connected to a monitoring terminal, a rocket launch controller and a smart lock unit 5. The safe reading and writing device includes a double-pole double-throw relay 4, and an interactive unit 1, a control unit 2 and a constant current communication unit 3 with a fixed output current connected in sequence. The interactive unit 1 is connected to the monitoring terminal. Interaction Unit 1 is responsible for external communication, receiving ignition commands or status queries; Control unit 2, as the processing core, receives instructions from interaction unit 1 and controls subsequent units. In addition, control unit 2 is equipped with multiple signal acquisition terminals for system status monitoring.

[0022] The constant current communication unit 3 outputs a tiny constant current of 0.1mA-3mA. This constant current is used for communication with the smart lock unit 5. On the other hand, because its current value is extremely low, even if there is a circuit fault or misoperation, it cannot directly ignite the electric sparking device, thus fundamentally ensuring safety.

[0023] The double-pole double-throw relay 4 contains a relay drive component 41 that is controlled by the control unit 2.

[0024] When the double-pole double-throw relay 4 is de-energized, the rocket launch controller is connected to the smart lock unit 5. If the smart lock unit 5 is authorized, the launch controller applies ignition energy to the ignition element through the smart lock unit 5, and the ignition element ignites. If the smart lock unit 5 is not authorized, the launch controller applies ignition energy to the ignition element through the smart lock unit 5, and the ignition element cannot ignite. Control unit 2 drives double-pole double-throw relay 4 to engage, constant current communication unit 3 connects with smart lock unit 5 for identity authentication. After successful authorization, the input terminal of smart lock unit 5 is connected to the ignition element, and control unit 2 drives double-pole double-throw relay 4 to release, preparing for final ignition.

[0025] The smart lock unit 5, mounted on the rocket, is essentially an "electronic key." Authentication is performed via the constant current communication unit 3. Only after successful authentication can the input terminal of the smart lock unit 5 connect to the ignition element, allowing the ignition signal to pass through.

[0026] The double-pole double-throw relay 4 and the constant current communication unit 3 constitute a lock-controlled ignition channel. There are at least two lock-controlled ignition channels. The double-pole double-throw relay 4 includes a relay drive component 41 connected to the control unit 2, a common terminal COM connected to the smart lock unit 5, a normally closed contact NO connected to the transmitter controller, and a normally open contact NC connected to the constant current communication unit 3.

[0027] The relay drive unit 41 is used to control the closing and opening of the contacts of the double-pole double-throw relay 4.

[0028] The constant current communication unit 3 communicates bidirectionally with the smart lock unit 5 via DC carrier wave. The leads of the constant current communication unit 3 can also supply power to the smart lock unit 5.

[0029] Each of the lock-controlled ignition channels is equipped with a signal acquisition terminal, and the control unit 2 simultaneously controls the signal acquisition terminals on multiple lock-controlled ignition channels to output multiple different or the same level.

[0030] The control unit 2 controls the relay drive component 41 to be energized, connecting the smart lock unit 5 and the constant current communication unit 3; the control unit 2 controls the relay drive component 41 to be de-energized, connecting the smart lock unit 5 and the transmitter controller; the safety ignition device is de-energized, connecting the smart lock unit 5 and the transmitter controller.

[0031] The rocket also includes an ignition element, which is electrically connected to the smart lock unit 5. The smart lock unit 5 controls the ignition element to be electrically connected to the launch controller.

[0032] For conventional rockets without the smart locking unit 5, the launch controller can directly operate the rocket's ignition element. The upgrade of weather rockets is a gradual replacement process. When using the safety ignition device of this application during launch, the new rockets with the smart locking unit 5 and the un-upgraded conventional rockets can be deployed and operated simultaneously.

[0033] The normally closed contact NO of the double-pole double-throw relay 4 is connected to the launch controller and the intelligent lock unit 5 of the rocket; the normally open contact NC is connected to the constant current communication unit 3; the control unit 2 is connected to the relay drive system of the double-pole double-throw relay 4; the control unit 2 is connected to the constant current communication unit 3 for communication with the intelligent lock unit 5; the control unit 2 is also connected to the interaction unit for communication with the field monitoring terminal; the interaction unit 1 includes, but is not limited to, an RS485 unit, an RS232 unit, a main processor, a WIFI unit, and a 4G unit. The RS485 unit, RS232 unit, WIFI unit, and 4G unit are all electrically connected to the main processor.

[0034] The RS232 unit is a level interface, and the RS485 unit is a differential interface. The level signal of the RS232 unit and the differential signal of the RS485 unit are both converted to TTL level for signal processing by the main processor.

[0035] The WIFI unit includes a Wi-Fi chip, firmware storage, radio frequency front-end module, antenna, and a media access control layer, baseband processor, and radio frequency transceiver integrated on the Wi-Fi chip; the 4G unit includes a 4G chip, application processor, memory module, radio frequency module, and antenna interface.

[0036] The double-pole double-throw relay 4 is used to switch the communication link of the rocket. The launch controller is connected to the rocket via the normally closed contact NO of the double-pole double-throw relay 4. The constant current communication unit 3 is connected to the rocket via the normally closed contact NC of the double-pole double-throw relay 4. When the double-pole double-throw relay 4 is activated, the constant current communication unit 3 is connected to the rocket. The smart lock unit 5 in the rocket can receive the command signal sent by the constant current communication unit 3. The smart lock unit 5 feeds back the response signal to the constant current communication unit 3 according to the command signal.

[0037] When the double-pole double-throw relay 4 is activated, the constant current communication unit 3 is connected to the output terminal of the lock-controlled ignition channel. Regardless of whether the output terminal is short-circuited or connected to an ignition element, the circuit current is limited to below 3mA. This ensures that the output terminal of the lock-controlled ignition channel cannot provide the electrical energy to ignite the rocket, whether it is connected to a rocket with a built-in intelligent lock unit 5 or a regular rocket.

[0038] The static power consumption of the smart lock unit 5 is less than 0.1mA. When the smart lock unit 5 sends a feedback signal to the constant current communication unit 3, it short-circuits the c and b terminals of the smart lock unit 5, causing the constant current communication unit 3 to reach its maximum current of 3mA. This change in signal level means that when the smart lock unit 5 is not sending a feedback signal to the constant current communication unit 3, the loop current of the constant current communication unit 3 is 0.1mA; when the smart lock unit 5 sends a feedback signal, the loop current of the constant current communication unit 3 reaches 3mA. This current change can be converted into 0.1V and 3V response voltage signals for the constant current communication unit 3. At this time, the first current-limiting resistor R1 is 1KΩ, which conforms to the TTL level protocol. The response voltage signal of the smart lock unit 5 is input to the control unit 2 of the safety ignition device. The control unit 2 of the safety ignition device extracts the response data of the smart lock unit 5 by detecting the response voltage signal.

[0039] The safety ignition device sends at least a read UID command and an unlock command to the smart lock unit 5 via the constant current communication unit 3. The read UID command sends the UID code stored in the smart lock unit 5 back to the safety ignition device, which then requests a transmission code from the transmission code center via a monitoring terminal. The safety ignition device sends an unlock command containing the transmission code to the smart lock unit 5 via the constant current communication unit 3. Upon receiving the unlock command, the smart lock unit 5 compares the transmission code in the unlock command with the transmission code stored in the smart lock unit 5. If they match, the electronic switch is activated, connecting the ignition circuit to the ignition element, thus enabling the unlocking function.

[0040] If the rocket is unlocked, its ignition resistor is equivalent to a 0.5-2Ω resistor externally. When the constant current communication unit 3 is working, the current always reaches its maximum value of 3mA, and each bit of the UID is 1. That is, the unlocked rocket is the same as a traditional rocket; when reading the UID, each bit of the returned UID is 1. However, when the rocket is not connected to the safety ignition device, the current received by the constant current communication unit 3 is always 0. Therefore, when the rocket is not connected to the safety ignition device, each bit of the returned UID is always 0.

[0041] After unlocking is completed, the control unit 2 of the safety ignition device shuts off the action of the double-pole double-throw relay 4, causing the connection of the rocket circuit of the rocket to switch to the launch controller. The launch controller can then perform resistance measurement and ignition operations on the unlocked ammunition.

[0042] The constant current communication unit 3 includes an operational amplifier and a MOSFET Q1. A constant current output is achieved by controlling the operating state of the MOSFET Q1. A constant current control voltage is connected to the positive input terminal of the operational amplifier to provide a reference voltage. A feedback resistor R3 is connected to the negative input terminal of the operational amplifier. An output voltage is generated by comparing the voltages at the two input terminals. The output terminal of the operational amplifier is connected to the gate of the MOSFET Q1. The output voltage of the operational amplifier is connected to the gate of the MOSFET Q1 for feedback control. The source and drain currents are controlled by controlling the gate voltage of the MOSFET Q1. The operational amplifier controls the output voltage through the feedback resistor R3.

[0043] A current-limiting resistor R2 is connected between the drain of the MOS transistor Q1 and the input terminal b of the smart lock unit 5 to prevent current spikes. A grounded current-limiting resistor R1 is connected to the source of the MOS transistor Q1 to generate a feedback voltage. The operating voltage VDD is connected to the input terminal c of the smart lock unit 5.

[0044] The magnitude of the constant current output is changed by adjusting the constant current control voltage reference source.

[0045] It is worth noting that the maximum current of the constant current communication unit 3 is less than the intrinsically safe current of the ignition element, preferably 3mA.

[0046] The signal acquisition terminal of the lock-controlled ignition channel is connected between the current-limiting resistor R1 and the source of the MOS transistor Q1 to acquire the voltage value at the source of the MOS transistor Q1. The common connection point of the feedback resistor R3 and the current-limiting resistor R1 is connected to the signal acquisition terminal of the lock-controlled ignition channel to form a feedback loop to monitor the voltage value at the negative input terminal of the operational amplifier.

[0047] When the signal acquisition terminal outputs a high level higher than the constant current control voltage, the MOSFET Q1 is turned off, and the input voltage of the smart lock unit 5 approaches 0; conversely, when the signal acquisition terminal outputs a low level or is in a floating state, the MOSFET Q1 is turned on, and the input voltage of the smart lock unit 5 approaches VDD; when the signal acquisition terminal is in the input state, if the input terminals c and b of the smart lock unit 5 are short-circuited, the signal acquisition terminal is at a high level; if the input terminals c and b of the smart lock unit 5 are open-circuited, the signal acquisition terminal is at a low level.

[0048] The current-limiting resistor R1 limits the current at the signal acquisition terminal, the current-limiting resistor R2 prevents the smart lock unit 5 from generating spike current, and the feedback resistor R3 enables the operational amplifier to control the output voltage through negative feedback.

[0049] If the constant current control voltage input is 2.5V, and the current-limiting resistor R1 is 1KΩ, then the current of the constant current communication unit 3 is 2.5mA. The output current of the constant current communication unit 3 can achieve a constant current output of less than 3mA depending on the constant current control input voltage.

[0050] It is worth noting that the operational amplifier and MOSFET Q1 have sufficient power and current capabilities to meet the required output.

[0051] The MOSFET Q1 operates by controlling the current between its source and drain by adjusting the gate voltage. At a low gate voltage, Q1 is in the cutoff region, and no current flows. At a high gate voltage, Q1 enters the active region, and current can flow. This characteristic allows Q1 to function as a switch in digital circuits.

[0052] When the signal acquisition terminal is in IO input state, if the smart lock unit 5 sends current, the signal acquisition terminal is at a high level; if the smart lock unit 5 does not send current, the signal acquisition terminal is at a low level.

[0053] When the signal acquisition terminal is in analog input mode, if no rocket is connected, the voltage value acquired by the signal acquisition terminal is lower than the set value, which is assumed to be 0.05V. If a rocket is connected, the voltage value acquired by the signal acquisition terminal is higher than the set value.

[0054] When the signal acquisition terminal is in IO output state, the voltage output by the signal acquisition terminal is higher than the voltage of the constant current control voltage output terminal of the control unit 2, and the MOSFET Q1 is cut off. Conversely, the MOSFET Q1 is turned on. That is, when the signal acquisition terminal is in IO output state, the input level of the smart lock unit 5 can be controlled by controlling the level of the signal acquisition terminal. In particular, each rocket connected to the firing channel has a different firing code, and the unlocking command contains the firing code. When sending the unlocking command, the unlocking command for each channel is different, and the output level of the corresponding signal acquisition terminal is also different. That is, different unlocking commands can be sent synchronously and concurrently to different firing channels.

[0055] During use, the control unit 2 sends a signal to the relay drive component 41, the double-pole double-throw relay 4 is energized, and the constant current communication unit 3 forms a circuit with the smart lock unit 5 through the normally open contact NC of the double-pole double-throw relay 4 to perform low-frequency, secure identity authentication communication; then authentication and authorization are performed, and the identity of the smart lock unit 5 is verified through the constant current circuit. During the authentication process, the control unit 2 monitors the circuit status through the signal acquisition terminal. After successful authentication, the double-pole double-throw relay 4 is released, and its contact state changes, disconnecting the constant current authentication circuit and closing the ignition circuit and the smart lock power circuit (normally closed contact NO is closed). At this time, the smart lock unit 5 obtains working voltage and makes the input terminal of the smart lock unit 5 connected to the ignition element, and is in the "unlocked" state. Then, after the control unit 2 confirms that the states of the double-pole double-throw relay 4 and the smart lock unit 5 are correct, it sends an ignition signal to the launch controller. The current ignites the ignition device through the closed contacts of the double-pole double-throw relay 4.

[0056] At any stage, if the signal acquisition end detects an anomaly (such as a short circuit, overcurrent, or authentication failure), the control unit 2 will terminate the process to ensure absolute safety.

[0057] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A safety ignition device, characterized in that: The system includes a security read / write device connected to a monitoring terminal, a rocket launch controller, and a smart lock unit (5). The security read / write device includes a double-pole double-throw relay (4), an interactive unit (1), a control unit (2), and a constant current communication unit (3) with a fixed output current connected in sequence. The interactive unit (1) is connected to the monitoring terminal. The double-pole double-throw relay (4) and the constant current communication unit (3) constitute a lock-controlled ignition channel. The lock-controlled ignition channel is provided with at least two channels. The double-pole double-throw relay (4) includes a relay drive component (41) connected to the control unit (2), a common terminal COM connected to the smart lock unit (5), a normally closed contact NO connected to the transmitter controller, and a normally open contact NC connected to the constant current communication unit (3). The constant current communication unit (3) and the smart lock unit (5) communicate bidirectionally without polarity.

2. The safety ignition device according to claim 1, characterized in that: Each of the lock-controlled ignition channels is equipped with a signal acquisition terminal, and the control unit (2) simultaneously controls the signal acquisition terminals on multiple lock-controlled ignition channels to output multiple different or the same level.

3. The safety ignition device according to claim 2, characterized in that: The control unit (2) controls the relay drive component (41) to be energized, connecting the smart lock unit (5) and the constant current communication unit (3); the control unit (2) controls the relay drive component (41) to be de-energized, connecting the smart lock unit (5) and the transmitter controller; the safety ignition device is de-energized, connecting the smart lock unit (5) and the transmitter controller.

4. A safety ignition device according to claim 3, characterized in that: The rocket also includes an ignition element, which is electrically connected to the smart lock unit (5). The smart lock unit (5) controls the ignition element to be electrically connected to the launch controller.

5. A safety ignition device according to claim 4, characterized in that: The constant current communication unit (3) includes an operational amplifier and a MOS transistor Q1. The positive input terminal of the operational amplifier is connected to the constant current control voltage at the rectifier line, the negative input terminal of the operational amplifier is connected to a feedback resistor R3, and the output terminal of the operational amplifier is connected to the gate of the MOS transistor Q1.

6. A safety ignition device according to claim 5, characterized in that: A current-limiting resistor R2 is connected between the drain of the MOS transistor Q1 and the input terminal b of the smart lock unit (5). A grounded current-limiting resistor R1 is connected to the source of the MOS transistor Q1. The operating voltage VDD is connected to the input terminal c of the smart lock unit (5).

7. A safety ignition device according to claim 6, characterized in that: The signal acquisition terminal of the lock-controlled ignition channel is connected between the current-limiting resistor R1 and the source of the MOS transistor Q1 to acquire the voltage value at the source of the MOS transistor Q1. The common connection point of the feedback resistor R3 and the current-limiting resistor R1 is connected to the signal acquisition terminal of the lock-controlled ignition channel to form a feedback loop to monitor the voltage value at the negative input terminal of the operational amplifier.

8. A safety ignition device according to claim 7, characterized in that: When the signal acquisition terminal outputs a high level higher than the constant current control voltage, the MOS transistor Q1 is turned off, and the input voltage of the smart lock unit (5) approaches 0; conversely, when the signal acquisition terminal outputs a low level or is in a floating state, the MOS transistor Q1 is turned on, and the input voltage of the smart lock unit (5) approaches VDD; when the signal acquisition terminal is in the input state, when the input terminals c and b of the smart lock unit (5) are short-circuited, the signal acquisition terminal is at a high level; when the input terminals c and b of the smart lock unit (5) are open-circuited, the signal acquisition terminal is at a low level.

9. A safety ignition device according to claim 1, characterized in that: The interaction unit (1) includes an RS485 unit, an RS232 unit, a main processor, a WIFI unit, and a 4G unit. The RS485 unit, RS232 unit, WIFI unit, and 4G unit are all electrically connected to the main processor.

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