Control system for fire operation

Abstract

The invention discloses a control system for fire operation. The control system comprises an alternating current relay, a control unit and a power supply unit, the alternating-current relay is used for controlling power supply of the fire operation equipment; the control unit is used for receiving an instruction of an external terminal and controlling the on-off of a coil of the alternating-current relay; the power supply unit is used for supplying power to the control unit. The method has the beneficial effects that the fire operation is controlled in real time by controlling the power supply condition of the fire equipment, and it can be guaranteed that the fire equipment can be started only within the time period allowing fire operation; therefore, the fire risk is reduced and the life safety of workers is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of construction safety, and in particular to a control system suitable for hot work at a construction site. Background Art

[0002] Hot work is a common form of work on construction sites. This involves welding, cutting, or other metalworking processes using various hot work equipment, including gas welding, electric welding, and flame cutting. Electric welding is a key component of hot work.

[0003] However, since these operations often involve extremely high temperatures and sparks, improper management can easily lead to fires or explosions. Therefore, safe management of hot work is crucial. Currently, hot work control primarily relies on manual controls, ensuring safety through the establishment of strict safety regulations, enhanced on-site supervision and inspections, and the implementation of a hot work permit system. However, unauthorized hot work cannot be completely eliminated. Summary of the Invention

[0004] In order to solve the problem that hot work such as electric welding at construction sites cannot be controlled in real time and workers carry out hot work without applying for a hot work permit, the present invention provides a control system for hot work.

[0005] In order to achieve the above-mentioned object of the invention, the present invention provides a control system for hot work, the control system comprising an AC relay, a control unit and a power supply unit; The AC relay is used to control the power supply of hot work equipment; The control unit is used to receive instructions from an external terminal and control the on and off of the AC relay coil; The power supply unit is used to supply power to the control unit.

[0006] The control unit includes an MCU, a communication module, a control module, a display module, a clock module, and a data acquisition module connected to the MCU; specifically, The MCU is responsible for processing the received instructions, and making a real-time judgment on whether the fire is allowed, and controlling the control module according to the judgment result; The communication module is used to exchange data with external terminals; The control module is used to receive the control signal of the MCU and connect to the coil of the AC relay through the MOS tube to realize the on-off control of the power supply circuit of the hot work equipment; The data acquisition module is used to collect the voltage, current and power consumption of hot work equipment; The display module is used to display the voltage, current, power consumption, working time and working status of the hot work equipment collected by the data collection module; The clock module is used to receive a calibration instruction and update the clock to a specified date and time.

[0007] The MCU is an STM32F103C8T6 chip, which has a built-in CRC calculation module, a DMA controller, multiple GPIO ports, and a timer; The clock module includes a DS1302 chip and a battery connected thereto. The DS1302 chip communicates with the MCU via an SPI interface. The clock module is an RTC clock module, which is used to provide real-time clock and calendar functions, accurately counting seconds, minutes, hours, days, weeks, months, and years, and automatically adjusting months and dates with less than 31 days and leap years. The battery provides an independent power supply function for the RTC clock module.

[0008] The data acquisition module includes: a current transformer and a voltage collector, the output end of the current transformer is connected to the voltage collector, and the voltage collector communicates with the MCU through the SPI interface; The system further comprises a ferroelectric memory FM24CL64, which is connected to the MCU via an I2C bus and is used for storing authorized operation period parameters and calibration data.

[0009] The control module includes a MOS transistor Q1 and a transistor Q2 connected to the MOS transistor Q1; The output end of the MCU is connected to the base of the transistor Q2 via a resistor R40, the collector of the transistor Q2 is connected to the gate of the MOS transistor Q1 via a resistor R32, the drain of the MOS transistor Q1 is connected to the coil of the AC relay, and the source of the MOS transistor Q1 is connected to the DC power supply VCC-12V; the other end of the AC relay coil is grounded; and the emitter of the transistor Q1 is grounded; The main circuit of the AC relay is connected in series with the power supply circuit of the hot work equipment to control the power supply of the hot work equipment.

[0010] A freewheeling diode D2 and a light-emitting diode D3 are connected in parallel at both ends of the coil of the AC relay; and the drain of the MOS tube Q1 is grounded via a decoupling capacitor C27.

[0011] The power supply unit includes an AC / DC module and a DC / DC module; and is used to supply power to the MCU, data acquisition module, display module, and communication module.

[0012] The communication unit is a Bluetooth module and / or a 4G module, which uses encryption algorithms to exchange secure data with external terminals. (If 4G is available, secure data exchange with the remote platform is carried out through the 4G network) Among them, the current transformer model is GTA30L, the voltage collector is the smart metering IC: HLW8112; the MCU model is STM32F103C8T6; the AC / DC module model of the power supply unit is AP12N20-HV, and the DC / DC module model is SY8253ADC; the 4G module of the communication module is EG800K, and the Bluetooth module is the Bluetooth chip HC-08; the clock module model is DAS1302.

[0013] The instructions received by the MCU include: "clock calibration", "allowed hot work time period", "suspend power output" and "continue power output". The MCU performs the following instruction response operations: (a) Clock calibration instructions: The current real-time time is obtained through the 4G module, and the current calibration time is written to the clock module through SPI communication. The time in the clock chip is then read and compared with the obtained current time until the time is consistent. The time calibration is completed. (b) Allowable hot work time period instruction: Parse the UTC time code in the command and verify the data integrity through the CRC module; If the check passes and the new start time is later than the original end time stored in the memory, the new time parameters are written to the memory via the I2C bus; Start the TIM timer to generate the MOS tube drive signal; (c) Pause power output command: Perform an XOR comparison between the current time and the authorized time period stored in the memory. If it is in the valid time period, the GPIO is controlled to output a low level, turning off the transistor Q2. (d) When receiving the “continue power output” command: Compare the time data consistency between the time module and the memory through the CRC calculation module; If the deviation is less than 30 seconds and the temperature data is normal, the TIM timer is restarted to output the PWM drive signal; (e) When receiving the "power output determination" command: Poll the 1Hz interrupt signal of the time module and read the real-time time code through the I2C bus on each rising edge; If the authorized time period stored in the memory is exceeded, an interrupt is immediately triggered to forcibly disconnect the output.

[0014] In order to better achieve the above-mentioned purpose of the invention, the present invention also provides a physical structure of the control system, which specifically includes a housing and a circuit board and an AC relay fixedly arranged in the housing. The MCU, display module, power supply module, communication module and clock module are arranged on the circuit board. The data acquisition module includes a current transformer and a voltage collector arranged on the circuit board; the display module is an OLED display screen; the housing includes an upper housing and a lower housing, and a transparent display screen cover is provided on the upper housing; Cables are fixed on two opposite sides of the shell through waterproof connectors, and the control system is connected to the power supply circuit of the hot work equipment through the cables.

[0015] The beneficial effects of the present invention are: the present invention controls hot work in real time by controlling the power supply status of hot work equipment, and can ensure that hot work equipment can only be started during the time period when hot work is allowed; thereby reducing fire risks and protecting the lives of workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a principle block diagram of Example 1 and Example 3 of the present invention.

[0017] Figure 2 This is a schematic structural diagram of Example 2 and Example 3 of the present invention.

[0018] Figure 3 1 is a circuit diagram of the control unit in Example 1 and Example 3 of the present invention.

[0019] Figure 4 The circuit diagram of the data acquisition module in Example 1 and Example 3 of the present invention is Wherein, the accompanying drawings are marked as follows: 1. Display screen cover; 2. Upper housing; 3. Circuit board; 4. Display module; 5. Power supply module; 6. Voltage collector; 7. Intermediate fixing plate; 8. Stud; 9. AC relay; 10. Current transformer; 11. Lower housing; 12. Waterproof connector. DETAILED DESCRIPTION

[0020] The present invention consists of a power supply unit, an AC relay, a communication module, an MCU, a control module, a clock module, and a display module. Its operating principle is as follows: the communication unit first receives information about the "permitted hot work time period" and then compares it with the internal time. Only when it is determined that the hot work time period is permitted will the AC relay be connected to power hot work equipment such as welding machines. This design not only improves construction safety but also enhances work efficiency.

[0021] In order to clearly illustrate the technical features of this solution, this solution is described below through specific implementation methods.

[0022] Example 1 See also Figure 1 , an embodiment of the present invention provides a control system for hot work, the control system includes an AC relay, a control unit and a power supply unit; wherein, AC relays, used to control the power supply to hot work equipment; A control unit, used to receive instructions from an external terminal and control the on and off of the AC relay coil; The power supply unit is used to supply power to the control unit.

[0023] The control unit includes an MCU, a communication module, a control module, a display module, a clock module, and a data acquisition module connected to the MCU. Specifically, MCU is responsible for processing the received instructions, making a real-time judgment on whether the ignition is allowed, and controlling the control module according to the judgment result; Communication module, used for data interaction with external terminals; The control module is used to receive the control signal from the MCU and connect to the coil of the AC relay through the MOS tube to control the on and off of the power supply circuit of the hot work equipment; Data acquisition module, used to collect voltage, current and power consumption of hot work equipment; A display module is used to display the voltage, current, power consumption, working time and working status of the hot work equipment collected by the data acquisition module; The system also includes a memory connected to the MCU via an I2C bus, for storing authorized operation period parameters and calibration data.

[0024] The clock module is used to receive a calibration instruction and update the clock to a specified date and time.

[0025] The MCU has built-in CRC calculation module, DMA controller, multiple GPIO ports, and timer; The clock module includes a DS1302 chip and a battery connected to it. The DS1302 chip communicates with the MCU via the SPI interface. See also Figure 4 The data acquisition module includes: a current transformer (model GTA30L) and a voltage collector (smart metering IC: HLW8112). The voltage collector collects voltage through the IAP and VP pins and collects current from the current transformer through the IBP and IBN pins. The voltage collector communicates with the MCU through the SPI interface. See also Figure 3 , the control module includes a MOS tube Q1 and a transistor Q2 connected to the MOS tube Q1; The output end of the MCU is connected to the base of transistor Q2 through resistor R40. The collector of transistor Q2 is connected to the gate of MOS transistor Q1 through resistor R32. The drain of MOS transistor Q1 is connected to the coil of the AC relay. The source of MOS transistor Q1 is connected to the DC power supply VCC-12V. The other end of the AC relay coil is grounded. The emitter of transistor Q1 is grounded. The main circuit of the AC relay is connected in series with the power supply circuit of the hot work equipment to control the power supply of the hot work equipment.

[0026] A freewheeling diode D2 and a light-emitting diode D3 are connected in parallel at both ends of the coil of the AC relay; and the drain of the MOS tube Q1 is grounded via a decoupling capacitor C27.

[0027] The power supply unit includes an AC / DC module and a DC / DC module; it is used to power the MCU, data acquisition module, display module, and communication module.

[0028] The communication unit is a Bluetooth module and / or a 4G module, which uses encryption algorithms to exchange secure data with external terminals. (If 4G is available, secure data exchange with the remote platform is carried out through the 4G network) The clock module includes an RTC clock module and a battery; The RTC clock module is used to provide real-time clock and calendar functions, which can accurately count seconds, minutes, hours, days, weeks, months and years, and automatically adjust the date of the month with less than 31 days and the date of leap year; The battery provides the RTC clock module with an independent external power supply function.

[0029] Among them, the MCU model is STM32F103C8T6; the AC / DC module model of the power supply unit is AP12N20-HV, and the DC / DC module model is SY8253ADC; the 4G module of the communication module is EG800K, and the Bluetooth module is the Bluetooth chip HC-08; the clock module model is DAS1302.

[0030] In addition, the MCU receives commands including: "clock calibration", "permitted power supply time period", "suspend power output", and "continue power output". The MCU performs the following command response operations: (a) Clock calibration instructions: The current real-time time is obtained through the 4G module, and the current calibration time is written to the clock module through SPI communication. The time in the clock chip is then read and compared with the obtained current time until the time is consistent. The time calibration is completed. (b) Allowable hot work time period instruction: Parse the UTC time code in the command and verify the data integrity through the CRC module; If the check passes and the new start time is later than the original end time stored in FM24CL64, the new time parameters are written to FM24CL64 via the I2C bus; Start the TIM timer to generate the MOS tube drive signal; (c) Pause power output command: Perform an XOR comparison between the current time and the authorized time period stored in FM24CL64. If it is in the valid time period, the GPIO is controlled to output a low level, turning off the transistor Q2. (d) When receiving the “continue power output” command: The time data consistency between DS1302 and FM24CL64 is compared through the hardware CRC module; If the deviation is less than 30 seconds and the temperature data is normal, the TIM timer is restarted to output the PWM drive signal; (e) When receiving the "power output determination" command: Poll the 1Hz interrupt signal of DS1302 and read the real-time time code through the I2C bus on each rising edge; If the authorized time period stored in FM24CL64 is exceeded, an interrupt is triggered immediately to forcibly disconnect the output.

[0031] For a better understanding, this embodiment is further explained from a logical perspective: When receiving the "clock calibration" command: the clock module performs calibration and adjusts the internal clock to the date and time specified by the command; When the "suspend power output" instruction is received: the clock module compares the instruction reception time with the currently stored allowed hot work time period. If the instruction reception time is within the allowed hot work time period, the power supply suspension time period is set according to the instruction indication time. If the instruction reception time is not within the allowed hot work time period, the instruction is invalid; if the "suspend power output" instruction is effective and the "replace hot work time period" instruction is received, the original allowed hot work time period is replaced with the new allowed hot work time period in the "replace hot work time period" instruction, and the suspension instruction is cleared; When receiving the "Replace Hot Work Time Period" command: After suspending power output, if there is a new "Permitted Hot Work Time Period" with a later start time, the original time period will be replaced and the suspension command will be cleared; When receiving the "continue power output" command: if it is in the power supply pause state, all pause commands will be cleared; if it is not in the power supply pause state, the command will be invalid; When receiving the "power supply output determination" instruction: the control unit will only execute power supply when it is within the time period for allowing fire, otherwise the instruction is invalid; during the power supply period, the micro control unit will continuously compare the current time with the stored time period for allowing fire and time period for suspended power supply.

[0032] In addition, when the current or voltage collected by the data acquisition module exceeds the set threshold, the MCU directly sends a power-off command, the AC relay is disconnected, and the hot work equipment stops working.

[0033] Example 2 See also Figure 2 Based on the content of Example 1, the embodiment of the present invention also includes a shell and a circuit board 3 and an AC relay 9 fixedly arranged in the shell. The circuit board 3 is provided with an MCU, a display module 4, a power supply module 5, a communication module and a clock module. The data acquisition module includes a current transformer 10 and a voltage collector 6 arranged on the circuit board 3; the display module is an OLED display screen 4; the shell includes an upper shell 2 and a lower shell 11, and a transparent display screen cover 1 is provided on the upper shell 2; an intermediate fixing plate 7 is provided in the shell, and the intermediate fixing plate 7 separates the current transformer 10 and the AC relay 9 at the bottom of the shell. The intermediate fixing plate 7 also plays a role in fixing and supporting the components, and can also play a role in electrical isolation; the upper shell 2 and the lower shell 11 are connected by studs 8; cables are fixed to the two opposite sides of the shell through waterproof connectors 12, and the control system is connected to the power supply circuit of the hot work equipment through the cable.

[0034] Example 3 See also Figure 1 , the embodiment of the present invention provides an embodiment of the present invention provides a control system for hot work, the control system includes an AC relay, a control unit and a power supply unit; wherein, AC relays, used to control the power supply to hot work equipment; A control unit, used to receive instructions from an external terminal and control the on and off of the AC relay coil; The power supply unit is used to supply power to the control unit.

[0035] The control unit includes an MCU, a communication module, a control module, a display module, a clock module, and a data acquisition module connected to the MCU. Specifically, MCU is responsible for processing the received instructions, making a real-time judgment on whether the ignition is allowed, and controlling the control module according to the judgment result; Communication module, used for data interaction with external terminals; The control module is used to receive the control signal from the MCU and connect to the coil of the AC relay through two MOS tubes to control the power supply circuit of the hot work equipment. See also Figure 4The data acquisition module includes: a current transformer (model GTA30L) and a voltage collector (smart metering IC: HLW8112). The voltage collector collects voltage through the IAP and VP pins and collects current from the current transformer through the IBP and IBN pins. The voltage collector communicates with the MCU through the SPI interface. A display module is used to display the voltage, current, power consumption, working time and working status of the hot work equipment collected by the data acquisition module; The clock module is used to receive a calibration instruction and update the clock to a specified date and time.

[0036] The MCU is an STM32F103C8T6 chip, which has a built-in CRC calculation module, DMA controller, multiple GPIO ports, and timers; The clock module includes a DS1302 chip and a battery connected to it. The DS1302 chip communicates with the MCU via the SPI interface. The system also includes a memory connected to the MCU via an I2C bus, for storing authorized operation period parameters and calibration data.

[0037] See also Figure 3 , the control module includes a MOS tube Q1 and a transistor Q2 connected to the MOS tube Q1; The output end of the MCU is connected to the base of transistor Q2 through resistor R40. The collector of transistor Q2 is connected to the gate of MOS transistor Q1 through resistor R32. The drain of MOS transistor Q1 is connected to the coil of the AC relay. The source of MOS transistor Q1 is connected to the DC power supply VCC-12V. The other end of the AC relay coil is grounded. The emitter of transistor Q1 is grounded. The main circuit of the AC relay is connected in series with the power supply circuit of the hot work equipment to control the power supply of the hot work equipment.

[0038] A freewheeling diode D2 and a light-emitting diode D3 are connected in parallel at both ends of the coil of the AC relay; and the drain of the MOS tube Q1 is grounded via a decoupling capacitor C27.

[0039] The power supply unit includes an AC / DC module and a DC / DC module; it is used to power the MCU, data acquisition module, display module, and communication module.

[0040] The communication unit is a Bluetooth module and / or a 4G module, which uses encryption algorithms to exchange secure data with external terminals. (If 4G is available, secure data exchange with the remote platform is carried out through the 4G network) The clock module includes an RTC clock module and a battery; The RTC clock module is used to provide real-time clock and calendar functions, which can accurately count seconds, minutes, hours, days, weeks, months and years, and automatically adjust the date of the month with less than 31 days and the date of leap year; The battery provides the RTC clock module with an independent external power supply function.

[0041] The commands received by the MCU include: "clock calibration", "permitted power supply time period", "suspend power output", and "continue power output". The MCU performs the following command response operations: (a) Clock calibration instructions: The current real-time time is obtained through the 4G module, and the current calibration time is written to the clock module through SPI communication. The time in the clock chip is then read and compared with the obtained current time until the time is consistent. The time calibration is completed. (b) Allowable hot work time period instruction: Parse the UTC time code in the command and verify the data integrity through the CRC module; If the check passes and the new start time is later than the original end time stored in FM24CL64, the new time parameters are written to FM24CL64 via the I2C bus; Start the TIM timer to generate the MOS tube drive signal; (c) Pause power output command: Perform XOR comparison between the current time and the authorized time period stored in FM24CL64. If it is in the valid time period, GPIO_PC13 is controlled to output a low level, turning off transistor Q2. (d) When receiving the “continue power output” command: The time data consistency between DS1302 and FM24CL64 is compared through the hardware CRC module; If the deviation is less than 30 seconds and the temperature data is normal, the TIM timer is restarted to output the PWM drive signal; (e) When receiving the "power output determination" command: Poll GPIO_PA4 to detect the 1Hz interrupt signal of DS1302, and read the authorization period parameters of FM24CL64 through the I2C bus on each rising edge; If the authorized time period stored in FM24CL64 is exceeded, an interrupt is triggered immediately to forcibly disconnect the output.

[0042] For a better understanding, this embodiment is further explained from a logical perspective: When receiving the "clock calibration" command: the clock module performs calibration and adjusts the internal clock to the date and time specified by the command; When receiving the "permitted time period for hot work" instruction: the clock module performs a comparison. If the start time of the new instruction is later than the previously stored time, the stored time is updated to the permitted time period for hot work specified by the instruction; When the "suspend power output" instruction is received: the clock module compares the instruction reception time with the currently stored allowed hot work time period. If the instruction reception time is within the allowed hot work time period, the power supply suspension time period is set according to the instruction indication time. If the instruction reception time is not within the allowed hot work time period, the instruction is invalid; if the "suspend power output" instruction is effective and the "replace hot work time period" instruction is received, the original allowed hot work time period is replaced with the new allowed hot work time period in the "replace hot work time period" instruction, and the suspension instruction is cleared; When receiving the "continue power output" command: if it is in the power supply pause state, all pause commands will be cleared; if it is not in the power supply pause state, the command will be invalid; When receiving the "power supply output determination" instruction: the control unit will only execute power supply when it is within the time period for allowing fire, otherwise the instruction is invalid; during the power supply period, the micro control unit will continuously compare the current time with the stored time period for allowing fire and time period for suspended power supply.

[0043] When the current or voltage collected by the data acquisition module exceeds the set threshold, the MCU sends a power-off command, the AC relay is disconnected, and the hot work equipment stops working.

[0044] Among them, the MCU model is STM32F103C8T6; the AC / DC module model of the power supply unit is AP12N20-HV, and the DC / DC module model is SY8253ADC; the 4G module of the communication module is EG800K, and the Bluetooth module is the Bluetooth chip HC-08; the clock module model is DAS1302.

[0045] See also Figure 2 Based on the contents of Example 1, the embodiment of the present invention further includes a housing and a circuit board 3 and an AC relay 9 fixedly arranged in the housing. The circuit board 3 is provided with an MCU, a display module 4, a power supply module 5, a communication module and a clock module. The data acquisition module includes a current transformer 10 and a voltage collector 6 arranged on the circuit board 3; the display module is an OLED display screen 4; the housing includes an upper housing 2 and a lower housing 11, and a transparent display screen cover 1 is provided on the upper housing 2; an intermediate fixing plate 7 is provided in the housing, and the intermediate fixing plate 7 separates the current transformer 10 and the AC relay 9 at the bottom of the housing; the upper housing 2 and the lower housing 11 are connected by studs 8.

[0046] Cables are fixed to two opposite sides of the housing via waterproof connectors 12, and the control system is connected to the power supply circuit of the hot work equipment via the cables.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A control system for hot work, characterized in that: Including AC relay, control unit and power supply unit; The AC relay is used to control the power supply of hot work equipment; The control unit is used to receive instructions from an external terminal and control the on and off of the AC relay coil; The power supply unit is used to supply power to the control unit.

2. The control system according to claim 1, characterized in that: The control unit includes an MCU, a communication module, a control module, a display module, a clock module, and a data acquisition module connected to the MCU; wherein, The MCU is responsible for processing the received instructions, and making a real-time judgment on whether the fire is allowed, and controlling the control module according to the judgment result; The communication module is used to exchange data with external terminals; The control module is used to receive the control signal of the MCU and connect to the coil of the AC relay through the MOS tube to realize the on-off control of the power supply circuit of the hot work equipment; The data acquisition module is used to collect the voltage, current and power consumption of hot work equipment; The display module is used to display the voltage, current, power consumption, working time and working status of the hot work equipment collected by the data collection module; The clock module is used to receive a calibration instruction and update the clock to a specified date and time.

3. The control system according to claim 2, characterized in that: The MCU has a built-in CRC calculation module, a DMA controller, multiple GPIO ports, and a timer; The clock module includes a DS1302 chip and a battery connected thereto, and the DS1302 chip communicates with the MCU via an SPI interface; The data acquisition module includes: a current transformer and a voltage collector, the output end of the current transformer is connected to the voltage collector, and the voltage collector communicates with the MCU through the SPI interface; The system further comprises a memory connected to the MCU via an I2C bus, for storing authorized operation period parameters and calibration data.

4. The control system according to claim 1, characterized in that: The control module includes a MOS tube and a triode connected to the MOS tube; The output end of the MCU is connected to the base of the transistor through a resistor, the collector of the transistor is connected to the gate of the MOS transistor through a resistor, the drain of the MOS transistor is connected to the coil of the AC relay, and the source of the MOS transistor is connected to a DC power supply; the other end of the AC relay coil is grounded; and the emitter of the transistor is grounded; The main circuit of the AC relay is connected in series with the power supply circuit of the hot work equipment to control the power supply of the hot work equipment.

5. The control system according to any one of claims 1 to 3, characterized in that: The power supply unit includes an AC / DC module and a DC / DC module; and is used to supply power to the MCU, data acquisition module, display module, and communication module.

6. The control system according to any one of claims 1 to 3, characterized in that: The communication unit is a Bluetooth module and / or a 4G module, which performs secure data interaction with an external terminal through an encryption algorithm.

7. The control system according to any one of claims 1 to 6, characterized in that: The MCU performs the following command response operations: (a) Clock calibration instructions: The current real-time time is obtained through the 4G module, and the current calibration time is written to the clock module through SPI communication. The time in the clock chip is then read and compared with the obtained current time until the time is consistent. The time calibration is completed. (b) Allowable hot work time period instruction: Parse the UTC time code in the command and verify the data integrity through the CRC module; If the check passes and the new start time is later than the original end time stored in the memory, the new time parameters are written to the memory via the I2C bus; Start the TIM timer to generate the MOS tube drive signal; (c) Pause power output command: Perform an XOR comparison between the current time and the authorized time period stored in the memory. If it is in the valid time period, the GPIO is controlled to output a low level, turning off the transistor Q2. (d) When receiving the "continue power output" command: Compare the time data consistency between the time module and the memory through the CRC calculation module; If the deviation is less than 30 seconds and the temperature data is normal, the TIM timer is restarted to output the PWM drive signal; (e) When receiving the "power output determination" command: Poll the 1Hz interrupt signal of the time module and read the real-time time code through the I2C bus on each rising edge; If the authorized time period stored in the memory is exceeded, an interrupt is immediately triggered to forcibly disconnect the output.

8. The control system according to any one of claims 1 to 3, characterized in that: When the current or voltage collected by the data acquisition module exceeds the set threshold, the MCU sends a power-off command, the AC relay is disconnected, and the hot work equipment stops working.

9. The control system according to any one of claims 1 to 3, characterized in that: The device further comprises a housing, a circuit board and an AC relay fixedly disposed in the housing; the circuit board is provided with the MCU, display module, power supply module, communication module and clock module; the data acquisition module comprises a current transformer and a voltage collector disposed on the circuit board; the display module is an OLED display screen; the housing comprises an upper housing and a lower housing; a transparent display screen cover is disposed on the upper housing; Cables are fixed on two opposite sides of the shell through waterproof connectors, and the control system is connected to the power supply circuit of the hot work equipment through the cables.

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