Airplane refueling vehicle emergency flameout system and control method

Abstract

The invention relates to the technical field of emergency flameout systems, in particular to an airplane refueling vehicle emergency flameout system which comprises a vehicle engine, a generator, a platform anti-collision switch, an engine flameout module, a first relay, a vehicle power source, an alarm and a second relay. The two ends of a normally open contact of the second relay are connected with the signal sending end and the signal input end of the engine flameout module in series respectively, and the engine flameout module is in communication connection with the vehicle engine. And the vehicle power supply, the normally closed contact of the first relay and the alarm are sequentially connected in series. By arranging the generator, the first relay and the alarm, a driver can be reminded through the alarm when the generator is abnormal and the engine flameout module cannot work; and meanwhile, under the condition that the anti-collision switch of the platform is not reset after being closed, equipment operation is stopped emergently, and the vehicle is prevented from being started again.

Description

Technical Field

[0001] The present invention relates to the technical field of emergency flameout systems, and more particularly to an emergency flameout system and a control method for an aircraft refueling vehicle. Background Art

[0002] Aircraft refueling trucks are special vehicles used to provide refueling and oil pumping services for aircraft at airports. These vehicles are usually equipped with oil tanks and oil pumps, and can add aviation kerosene into the aircraft through gravity refueling, pressure refueling, etc., thereby completing the fuel replenishment operation. The emergency shutdown system of the aircraft refueling truck is a safety device designed to quickly stop the refueling operation in an emergency to ensure the safety of personnel and equipment. When using an external signal to output a signal to the engine shutdown module, the other components connected to the external signal will affect the stability of the signal.

[0003] In the prior art, an engine shutdown module with a signal source is used. In an emergency, the signal source sends a signal to the engine shutdown module to shut down the engine. The output signal of this engine shutdown module with a signal source is more stable. However, when testing a single emergency shutdown switch or platform anti-collision switch of an aircraft refueling truck, it was found that when any emergency shutdown switch was not reset or the anti-collision bar switch failed (in a closed circuit), the refueling truck could still start normally, hang the pump, and raise the platform for refueling operations. However, at this time, all the anti-collision bar switches and emergency shutdown switches of the platform were in an invalid state, and the emergency shutdown function would be completely invalid. There is a risk that the equipment cannot be stopped urgently in an abnormal situation, causing the platform to collide with the aircraft or damage the equipment. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiency of the prior art that the equipment cannot be stopped urgently when an abnormality occurs, and to provide an emergency shutdown system for an aircraft refueling truck, which improves the system stability and can stop the equipment urgently when an abnormality occurs.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] Provided is an emergency flameout system for an aircraft refueling vehicle, comprising a vehicle engine, a generator, a platform anti-collision switch, an engine flameout module, a first relay, a vehicle power supply, an alarm and a second relay, wherein the generator is connected to an output end of the vehicle engine, the generator, the platform anti-collision switch and the second relay coil are electrically connected in sequence, the engine flameout module has a signal source, and the signal source has a signal sending end; two ends of a normally open contact of the second relay are respectively connected in series with the signal sending end and a signal input end of the engine flameout module, and the engine flameout module is communicatively connected with the vehicle engine; one end of the first relay coil is connected in series with the generator, and the other end is grounded; the vehicle power supply, the normally closed contact of the first relay and the alarm are connected in series in sequence.

[0007] The emergency flameout system of the aircraft refueling vehicle of the present invention, when the platform anti-collision switch and the generator are normal, the platform anti-collision switch is disconnected, the second relay is powered off, the vehicle starts and drives the vehicle engine to start, the vehicle engine drives the generator to work, the first relay is powered on, the alarm circuit is disconnected, the alarm does not work, and the vehicle starts and runs normally. When a collision occurs, the platform anti-collision switch is closed, the second relay is powered on, the engine flameout module receives a trigger signal, and the vehicle engine is turned off. After the flameout, the first relay is powered off, the alarm circuit is powered on, and the alarm starts to alarm. When the generator is abnormal, the platform anti-collision switch cannot work on the engine flameout module. At this time, the first relay is not powered on, the second relay is powered off, and the vehicle power flows to the alarm through the normally closed contact of the first relay. The alarm starts to alarm and informs the driver that the generator has a fault. When the platform anti-collision switch is closed, the vehicle engine is turned off and the generator stops running. At this time, if the platform anti-collision switch is not reset after closing, but the vehicle engine is started again, the generator is powered on, the second relay is powered on, and the signal source generates a trigger signal to the engine flameout module, which can turn off the vehicle engine again. This circuit improves the stability of the system by setting a signal source on the engine shutdown module. It can remind the driver through the alarm when the generator is abnormal and the engine shutdown module cannot work. At the same time, it can stop the equipment operation in an emergency if the platform anti-collision switch is closed but not reset to prevent the vehicle from starting again.

[0008] Furthermore, it also includes an electrical cabinet terminal block, and the two ends of the normally open contact of the second relay are respectively connected to a signal sending line and a signal receiving line, and the signal sending line and the signal receiving line are both installed and connected to the electrical cabinet terminal block, the signal sending line is electrically connected to the signal sending end, and the signal receiving line is electrically connected to the engine flameout module. By setting up the electrical cabinet terminal block, it is convenient to fix and install the signal sending line and the signal receiving line, and it is also convenient to disassemble and repair the entire emergency flameout circuit.

[0009] Furthermore, a fuse is also included, and both ends of the fuse are respectively connected in series with the generator and the platform anti-collision switch, and one end of the first relay coil close to the generator is connected in series with the fuse. By setting the fuse, the circuit safety can be protected and the danger caused by excessive current can be prevented.

[0010] Furthermore, an emergency flameout override switch is also included, wherein two ends of the emergency flameout override switch are respectively connected in series with the generator and the platform anti-collision switch, and one end of the first relay coil is connected in series with the emergency flameout override switch. By providing the emergency flameout override switch, the safety performance of the circuit can be further improved.

[0011] Furthermore, the alarm is configured as an audible and visual alarm, which can give a clear warning to the driver by giving both sound and light.

[0012] Furthermore, a manual emergency flameout switch is also included, and the manual emergency flameout switch is connected in parallel with the platform anti-collision switch. By setting the manual emergency flameout switch, the vehicle emergency flameout can be manually controlled on the platform, further improving the safety performance of the circuit.

[0013] Furthermore, the platform anti-collision switches are provided in plurality, and the plurality of platform anti-collision switches are connected in parallel. By providing a plurality of platform anti-collision switches, when one platform anti-collision switch fails, other platform anti-collision switches can also generate a trigger signal to the engine shutdown module, thereby improving safety performance.

[0014] Furthermore, each of the platform anti-collision switches is connected in series with a unidirectional diode, the other ends of the multiple unidirectional diodes are connected in parallel, each of the platform anti-collision switches is connected in series with a light-emitting diode, and the other ends of the multiple light-emitting diodes are grounded. Through the setting of the light-emitting diodes, the driver can be informed of the platform anti-collision switch that specifically triggers the engine to shut down, thereby quickly determining the abnormal location.

[0015] Furthermore, each of the light emitting diodes is connected in series with a resistor. By setting the resistor, the current flowing through the light emitting diode can be controlled to prevent the light emitting diode from being burned out due to excessive current.

[0016] The present invention also provides an aircraft refueling truck emergency flameout control method, using the above aircraft refueling truck emergency flameout system, comprising:

[0017] When the vehicle starts normally, the platform anti-collision switch is disconnected, the second relay is powered off, the signal sending end and the signal input end of the engine shutdown module are disconnected, the vehicle starts, the vehicle engine drives the generator to work, the first relay is powered on, and the alarm circuit is disconnected;

[0018] When the platform anti-collision switch receives a collision signal, the platform anti-collision switch is closed, the second relay is energized, the engine shutdown module receives a trigger signal, the engine shutdown module sends a shutdown signal to the vehicle engine, the vehicle engine is shut down, the first relay is de-energized, and the alarm sends an alarm signal;

[0019] When the generator is abnormal, the second relay is de-energized, the first relay is de-energized, the vehicle is powered on to drive the vehicle power supply to work, and the vehicle power supply flows to the alarm through the normally closed contact of the first relay, and the alarm sends out an alarm signal;

[0020] When the platform anti-collision switch is closed and not reset, the vehicle engine is started, the generator is powered, the second relay is energized, the signal sending end and the signal input end of the engine shutdown module are connected, the engine shutdown module receives the trigger signal, the engine shutdown module sends a shutdown signal to the vehicle engine, the vehicle engine is shut down, the first relay is de-energized, and the alarm sends an alarm signal.

[0021] The invention discloses an emergency flameout control method for an aircraft refueling vehicle, which improves system stability and can stop the operation of the equipment in an emergency in the event of an abnormality.

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

[0023] 1. An emergency shutdown system and control method for an aircraft refueling vehicle of the present invention can, by providing a generator, a first relay and an alarm, remind the driver through the alarm when an abnormality occurs in the generator and the engine shutdown module fails to function; at the same time, when the platform anti-collision switch is closed but not reset, the equipment can be stopped in an emergency to prevent the vehicle from starting again.

[0024] 2. An emergency shutdown system and control method for an aircraft refueling vehicle of the present invention, by setting a second relay and allowing the engine shutdown module to have a signal source, can use the signal sending end of the signal source to provide power supply feedback to its own engine shutdown module, without the need for an external signal, so that the feedback signal is more stable and not affected by other external components. At the same time, when the platform anti-collision switch is closed but not reset, but the vehicle engine is started again, the generator power supply generates a trigger signal to the engine shutdown module, which can shut down the vehicle engine again. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a circuit diagram of an emergency flameout system in the prior art;

[0026] Figure 2 The invention discloses a circuit diagram of an emergency flameout system for an aircraft refueling vehicle.

[0027] In the attached figure: 1. Vehicle engine; 2. Generator; 3. Platform anti-collision switch; 4. Engine shutdown module; 401. Signal sending end; 5. First relay; 6. Vehicle power supply; 7. Alarm; 8. Second relay; 801. Signal sending line; 802. Signal receiving line; 9. Electrical cabinet terminal block; 10. Fuse; 11. Emergency shutdown override switch; 12. Manual emergency shutdown switch; 13. One-way diode; 14. Light-emitting diode; 15. Resistor; 16. D+ module. DETAILED DESCRIPTION

[0028] The present invention is further described below in conjunction with specific implementation methods. The accompanying drawings are only used for exemplary descriptions and are only schematic diagrams, not actual drawings, and cannot be understood as limiting this patent; in order to better illustrate the embodiments of the present invention, some parts of the accompanying drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the accompanying drawings may be omitted.

[0029] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0030] Embodiment 1

[0031] like Figure 1As shown, the existing emergency shutdown system includes a platform anti-collision switch 3 and an engine shutdown module 4, wherein the engine shutdown module 4 has a signal source, the signal source has a signal sending end 401, and the two ends of the platform anti-collision switch 3 are respectively connected in series with the signal sending end 401 and the engine shutdown module 4. When the platform anti-collision switch 3 works normally, that is, when the platform anti-collision switch 3 is closed, the signal source will send a trigger signal to the engine shutdown module 4, and after the engine shutdown module 4 receives the signal, it will control the vehicle engine 1 to shut down. However, the engine shutdown module 4 cannot identify non-trigger signals, so when an abnormal event occurs, such as the platform anti-collision switch 3 is in an unreset state for a long time, for example, the fault contact cannot be separated, and the circuit is always closed at this time. When the vehicle's main power supply is cut off, when the power is started again, since the platform anti-collision switch 3 is always in a closed state, a trigger signal cannot be generated. Therefore, at this time, the engine shutdown module 4 will determine that the vehicle has no abnormality, and the refueling truck can still start normally, hang the pump, and raise the platform for refueling operations. However, at this time, all the anti-collision bar switches and emergency shutdown switches of the platform are in a failed state, and the function of the engine shutdown module 4 will be completely ineffective. There is a risk that the equipment cannot be stopped urgently in an abnormal situation, causing the platform to collide with the aircraft or damage the equipment.

[0032] This embodiment is a first embodiment of an emergency flameout system and control method for an aircraft refueling vehicle. Figure 1 As shown, it includes a vehicle engine 1, a generator 2, a platform anti-collision switch 3, an engine shutdown module 4, a first relay 5, a vehicle power supply 6, an alarm 7 and a second relay 8. The generator 2 is connected to the output end of the vehicle engine 1, that is, when the vehicle is powered on, the generator 2 does not work, and when the vehicle is started, that is, when the vehicle engine 1 is started, the generator 2 works. The generator 2 in this embodiment is a chassis built-in generator, such as Figure 2As shown, the generator 2 is originally used to power the D+ module 16 of the vehicle. This circuit is connected in parallel with the D+ module 16. The generator 2 powers the D+ module 16 and this circuit at the same time. There is no need to add an additional generator 2, which reduces the circuit cost. The generator 2, the platform anti-collision switch 3 and the coil of the second relay 8 are electrically connected in sequence, and the other end of the coil of the second relay 8 is grounded. The engine shutdown module 4 has a signal source, which can use the signal source signal sending end 401 to output the signal feedback to itself, without the need for an external signal, so that the feedback signal is more stable and is not affected by other external components. The signal source has a signal sending end 401; the two ends of the normally open contact of the second relay 8 are respectively connected in series with the signal sending end 401 and the signal input end of the engine shutdown module 4, and the engine shutdown module 4 is connected to the vehicle engine 1. One end of the coil of the first relay 5 is connected in series with the generator 2, and the other end is grounded. The vehicle power supply 6, the normally closed contact of the first relay 5 and the alarm 7 are connected in series in sequence. The vehicle power supply 6 is controlled by the vehicle key, that is, when the vehicle is powered on when the key is inserted, the vehicle power supply 6 is powered on. In order to ensure that the newly added equipment does not affect the safe operation of the original equipment, a separate grounding device is added on site for the newly added equipment to ensure that the overall system operates reliably and stably.

[0033] When there is no abnormality in the platform anti-collision switch 3 and the generator and the vehicle starts normally, the platform anti-collision switch 3 is disconnected, the second relay 8 is powered off and not triggered, the signal sending end 401 and the signal input end of the engine shutdown module 4 are disconnected, the vehicle starts, the vehicle engine 1 drives the generator 2 to work, the first relay 5 is energized, the alarm 7 circuit is disconnected, the alarm 7 does not work, and the vehicle starts and runs normally.

[0034] When a collision occurs, the platform anti-collision switch 3 receives a collision signal, the platform anti-collision switch 3 is closed, the coil of the second relay 8 is energized and triggered, the signal sending end 401 and the signal input end of the engine shutdown module 4 are connected, and the signal input end of the engine shutdown module 4 receives a trigger signal, causing the vehicle engine 1 to shut down. After the engine is shut down, the first relay 5 is de-energized, the alarm 7 works, and the alarm 7 sends an alarm signal to remind the operator.

[0035] When an abnormality occurs in the generator 2, the platform anti-collision switch 3 cannot work on the engine shutdown module 4, and the second relay 8 is powered off and not triggered. At this time, the first relay 5 is not powered, and the vehicle is powered on to drive the vehicle power supply 6 to work. The vehicle power supply 6 flows to the alarm 7 through the normally closed contacts of the first relay 5. The alarm 7 starts to alarm, informing the driver that the generator 2 has a fault.

[0036] When the platform anti-collision switch 3 is closed, the vehicle engine 1 is turned off and the generator 2 stops running. At this time, if the platform anti-collision switch 3 is not reset after closing, but the vehicle engine 1 is started again, the generator 2 is powered, the second relay 8 is energized and triggered, the signal sending end 401 and the signal input end of the engine shutdown module 4 are connected, and a trigger signal is generated to the signal input end of the engine shutdown module 4, which can turn off the vehicle engine 1 again. The existing emergency shutdown system will not occur, and the refueling truck can still start normally, hang the pump, and raise the platform for refueling operations.

[0037] This circuit improves the stability of the system by setting a signal source on the engine shutdown module 4; it can remind the driver through an alarm when the generator is abnormal and the engine shutdown module cannot work; at the same time, it can stop the equipment operation in an emergency when the platform anti-collision switch is closed and not reset to avoid the vehicle starting again.

[0038] Embodiment 2

[0039] This embodiment proposes an emergency flameout system and control method for an aircraft refueling vehicle. Based on the first embodiment, in this embodiment, Figure 2 As shown, it also includes an electrical cabinet terminal block 9, and the two ends of the normally open contact of the second relay 8 are respectively connected to a signal sending line 801 and a signal receiving line 802, and the signal sending line 801 and the signal receiving line 802 are both installed and connected to the electrical cabinet terminal block 9, the signal sending line 801 is electrically connected to the signal sending end 401, and the signal receiving line 802 is electrically connected to the signal input end of the engine shutdown module 4. By providing the electrical cabinet terminal block 9, it is convenient to fix and install the signal sending line 801 and the signal receiving line 802, and it is also convenient to disassemble and repair the entire emergency shutdown circuit.

[0040] The device also includes a fuse 10, the two ends of which are respectively connected in series with the generator 2 and the platform anti-collision switch 3, and the end of the coil of the first relay 5 close to the generator 2 is connected in series with the fuse 10. By setting the fuse 10, the circuit safety can be protected and the danger caused by excessive current can be prevented. The fuse 10 is set as a 1A fuse. The circuit current can be controlled within a smaller range to avoid danger caused by excessive current.

[0041] It also includes an emergency flameout override switch 11, both ends of which are connected in series with the generator 2 and the platform anti-collision switch 3, respectively, and one end of the coil of the first relay 5 is connected in series with the emergency flameout override switch 11. By providing the emergency flameout override switch 11, the safety performance of the circuit can be further improved.

[0042] Alarm 7 is set as sound and light alarm. Dual alarming by sound and illumination can remind the driver.

[0043] When an abnormality occurs in the fuse 10 or the emergency shutdown override switch 11, similar to an abnormality occurs in the generator 2, the platform anti-collision switch 3 cannot work on the engine shutdown module 4, and the second relay 8 is powered off and not triggered. At this time, the first relay 5 is not energized, and the vehicle is powered on to drive the vehicle power supply 6 to work. The vehicle power supply 6 flows to the alarm 7 through the normally closed contacts of the first relay 5. The alarm 7 starts to alarm, informing the driver that the fuse 10 or the emergency shutdown override switch 11 has a fault.

[0044] Embodiment 3

[0045] This embodiment proposes an emergency flameout system and control method for an aircraft refueling vehicle. Based on the first or second embodiment, in this embodiment, Figure 2 As shown, a manual emergency flameout switch 12 is also included, and the manual emergency flameout switch 12 is connected in parallel with the platform anti-collision switch 3. By setting the manual emergency flameout switch 12, the vehicle emergency flameout can be manually controlled on the platform, and manual control is performed in an emergency, further improving the safety performance of the circuit.

[0046] There are multiple platform anti-collision switches 3, and multiple platform anti-collision switches 3 are connected in parallel. By setting multiple platform anti-collision switches 3, when one platform anti-collision switch 3 fails, other platform anti-collision switches 3 can also generate a trigger signal to the engine shutdown module 4, thereby improving safety performance.

[0047] Each platform anti-collision switch 3 is connected in series with a unidirectional diode 13, and the other ends of the multiple unidirectional diodes 13 are connected in parallel. Each platform anti-collision switch 3 is connected in series with a light-emitting diode 14, and the other ends of the multiple light-emitting diodes 14 are grounded. Through the setting of the light-emitting diode 14, the driver can be informed of the platform anti-collision switch 3 that specifically triggers the engine to shut down. At the same time, a mark can be added to the installation position of the light-emitting diode 14 to assist the driver to quickly determine the abnormal position. Each light-emitting diode 14 is connected in series with a resistor 15. By setting the resistor 15, the current flowing through the light-emitting diode 14 can be controlled to prevent the light-emitting diode 14 from burning out due to excessive current.

[0048] In the specific contents of the above-mentioned specific implementation methods, the various technical features can be combined in any non-contradictory manner. In order to make the description concise, not all possible combinations of the above-mentioned technical features are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0049] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An emergency flameout system for an aircraft refueling vehicle, characterized in that: The invention comprises a vehicle engine (1), a generator (2), a platform anti-collision switch (3), an engine shutdown module (4), a first relay (5), a vehicle power supply (6), an alarm (7) and a second relay (8), wherein the generator (2) is connected to the output end of the vehicle engine (1), the generator (2), the platform anti-collision switch (3) and the coil of the second relay (8) are electrically connected in sequence, the engine shutdown module (4) has a signal source, and the signal source has a signal sending end (401); the two ends of the normally open contact of the second relay (8) are respectively connected in series with the signal sending end (401) and the signal input end of the engine shutdown module (4), and the engine shutdown module (4) is connected in communication with the vehicle engine (1); one end of the coil of the first relay (5) is connected in series with the generator (2), and the other end is grounded; the vehicle power supply (6), the normally closed contact of the first relay (5) and the alarm (7) are connected in series in sequence.

2. The aircraft refueling truck emergency shutdown system according to claim 1, characterized in that: It also includes an electrical cabinet terminal block (9), the two ends of the normally open contact of the second relay (8) are respectively connected to a signal sending line (801) and a signal receiving line (802), the signal sending line (801) and the signal receiving line (802) are both installed and connected to the electrical cabinet terminal block (9), the signal sending line (801) is electrically connected to the signal sending end (401), and the signal receiving line (802) is electrically connected to the engine shutdown module (4).

3. The aircraft refueling truck emergency shutdown system according to claim 1, characterized in that: It also includes a fuse (10), the two ends of which are respectively connected in series with the generator (2) and the platform anti-collision switch (3), and the end of the first relay (5) coil close to the generator (2) is connected in series with the fuse (10).

4. The aircraft refueling truck emergency shutdown system according to claim 1, characterized in that: It also includes an emergency flameout override switch (11), wherein two ends of the emergency flameout override switch (11) are respectively connected in series with the generator (2) and the platform anti-collision switch (3), and one end of the coil of the first relay (5) is connected in series with the emergency flameout override switch (11).

5. The aircraft refueling truck emergency shutdown system according to claim 1, characterized in that: The alarm (7) is configured as an audible and visual alarm.

6. The aircraft refueling truck emergency shutdown system according to any one of claims 1 to 5, characterized in that: It also comprises a manual emergency flameout switch (12), wherein the manual emergency flameout switch (12) is connected in parallel with the platform anti-collision switch (3).

7. The aircraft refueling truck emergency shutdown system according to any one of claims 1 to 5, characterized in that: The platform anti-collision switch (3) is provided in plurality, and the plurality of platform anti-collision switches (3) are connected in parallel.

8. The aircraft refueling truck emergency shutdown system according to claim 7, characterized in that: Each of the platform anti-collision switches (3) is connected in series with a unidirectional diode (13), the other ends of the plurality of unidirectional diodes (13) are connected in parallel, each of the platform anti-collision switches (3) is connected in series with a light-emitting diode (14), the other ends of the plurality of light-emitting diodes (14) are grounded.

9. The aircraft refueling truck emergency shutdown system according to claim 8, characterized in that: Each of the light emitting diodes (14) is connected in series with a resistor (15).

10. An emergency flameout control method for an aircraft refueling vehicle, characterized in that: The aircraft refueling truck emergency flameout system according to any one of claims 1 to 9 comprises: When the vehicle starts normally, the platform anti-collision switch (3) is disconnected, the second relay (8) is powered off, the signal sending end (401) and the signal input end of the engine shutdown module (4) are disconnected, the vehicle starts, the vehicle engine (1) drives the generator (2) to work, the first relay (5) is powered on, and the alarm (7) circuit is disconnected; When the platform anti-collision switch (3) receives a collision signal, the platform anti-collision switch (3) is closed, the second relay (8) is energized, the engine shutdown module (4) receives a trigger signal, the engine shutdown module (4) sends a shutdown signal to the vehicle engine (1), the vehicle engine (1) is shut down, the first relay (5) is de-energized, and the alarm (7) sends an alarm signal; When the generator (2) is abnormal, the second relay (8) is powered off, the first relay (5) is powered off, the vehicle is powered on to drive the vehicle power supply (6) to work, and the alarm (7) sends out an alarm signal; When the platform anti-collision switch (3) is closed but not reset, the vehicle engine (1) is started, the generator (2) is powered, the second relay (8) is energized, the signal sending end (401) and the signal input end of the engine shutoff module (4) are connected, the engine shutoff module (4) receives a trigger signal, the engine shutoff module (4) sends a shutoff signal to the vehicle engine (1), the vehicle engine (1) is shut off, the first relay (5) is powered off, and the alarm (7) sends an alarm signal.

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