A DCAC electric control system and control method for mechanical intelligent capping of mixed-rail vehicles

Abstract

The invention discloses a DCAC electric control system for mechanical intelligent capping of a mixed iron vehicle. The system has a simple and reasonable design. A DC / AC module is used to provide an AC power supply, a wireless AP terminal is used to realize remote centralized control or a local onboard control box and an HMI to control a variable frequency PLC control system, and a mechanical transmission drive mechanism is used to realize one-key automatic capping and removal of a capping device and jog the actions of each sub-part. The on-board touch screen and the upper computer can provide real-time feedback of the current working status, the health status of each on-board device and other information, thereby providing a visual safe operation guarantee for the capping electrical control system and operators, and the control is safe and reliable. At the same time, each unit of the control system adopts a modular installation method, which solves the problem of rapid removal and various fault handling of the capping device and the electric control system, and greatly saves the production and maintenance costs of the iron can flipping.

Description

Technical Field

[0001] The invention belongs to the technical field of electric control of mixed-rail vehicles, and relates to a DCAC electric control system and a control method for mechanical intelligent capping of mixed-rail vehicles. Background Art

[0002] As an indispensable molten iron transportation and storage equipment in the modern metallurgical industry, the mixing car plays an important role in metallurgical enterprises. The mixing car includes an active end and a driven end, and a tank body for storing and transporting molten iron is movably arranged between the active and slave ends. The tank mouth is opened at the center of the top of the tank body. In order to avoid air pollution caused by smoke and dust emitted by the molten iron in the tank body, and excessive loss of molten iron temperature due to the open tank mouth, the mixing car is usually equipped with an insulation cover device.

[0003] At present, the domestic mixed iron car tank mouth insulation capping electronic control system mostly adopts the on-board control cabinet button operation or the near-ground handheld remote control operation mode, and the related action mechanism is driven by the relay control mode or the small PLC to complete the insulation cover lifting and lowering operation. The handheld remote control transmitter has a complex structure and is cumbersome to operate, and it is impossible to realize the remote control of one-to-many cars; in the actual lifting and lowering operation, each iron outlet needs to be equipped with at least two operators to complete the on-site operation and on-site monitoring and coordination work. The on-site environment of iron receiving and tank flipping poses a great safety hazard to the operators; in addition, the on-board power supply technology used in the existing mixed iron car is usually a high-voltage battery pack directly powered to drive the DC load mode or a low-voltage battery pack driven by the inverter boost device. The AC load mode, these two power supply modes are generally large in size and complex in control system when applied in practice, and are not suitable for the limited area maintenance or installation of mixed iron cars. In addition, during the system action cycle, the system hardware response time is long, and the long action cycle of the capping mechanism causes the battery pack to consume power too quickly, which cannot meet the requirements of iron receiving and tank flipping production timeliness and instantaneousness. Summary of the invention

[0004] In view of the technical defects existing in the background technology, the present invention provides a DCAC electric control system and control method for mechanical intelligent capping of a hybrid rail vehicle, and the technical solutions to the technical problems are as follows:

[0005] The present invention discloses a DCAC electric control system for mechanical intelligent capping of a mixed-iron vehicle. The mixed-iron vehicle comprises an active end, a driven end and a tank body arranged therebetween and having a tank mouth, a tank cover being movably arranged at the tank mouth, the active end comprising a dust cover, a capping device being arranged on the dust cover, and a position detection unit being arranged at the capping device; the system also comprises an electrical control cabinet and an on-board operation box, a battery pack, a PLC, a DC / AC module, a protection circuit unit, a telescopic drive circuit unit, a lifting and lowering drive circuit unit and a frequency converter being installed in the electrical control cabinet; the capping device comprises a lifting and lowering motor, a lifting and lowering arm worm gear mechanism being arranged at the output end of the lifting and lowering motor, a telescopic arm lead screw mechanism being arranged at the top of the lifting and lowering arm worm gear mechanism, and the rear end and the front end of the telescopic arm lead screw mechanism are respectively connected to the telescopic motor and the tank cover ; One output end of the battery pack is connected to the input end of the DC / AC module, and the other output end serves as a control power supply unit and is connected to the PLC; the PLC input end is connected to the vehicle-mounted operation box, the position detection unit and the PLC communication interface, and its output ends are respectively connected to the protection circuit unit, the telescopic drive circuit unit and the lifting and lowering drive circuit unit; the protection circuit unit is connected to the input end of the DC / AC module, and the output end of the DC / AC module is respectively connected to the frequency converter and the lifting and lowering drive circuit unit, and the lifting and lowering drive circuit unit is connected to the lifting and lowering motor; the telescopic drive circuit unit is connected to the input end of the frequency converter; the output end of the frequency converter is connected to the telescopic motor; the battery pack, DC / AC module and frequency converter are respectively connected to the PLC communication interface through communication cables.

[0006] Furthermore, the position detection unit includes a retracted arm in-position proximity sensor, a retracted arm deceleration proximity sensor, an extended arm in-position proximity sensor and an extended arm deceleration proximity sensor arranged along the telescopic arm screw mechanism, and a dropped arm proximity sensor and a raised arm proximity sensor arranged along the lifting and lowering arm worm gear mechanism. The front and rear sides of the telescopic arm screw mechanism are respectively provided with a telescopic sensing head and a lifting and lowering sensing head, and the retracted arm in-position proximity sensor, the retracted arm deceleration proximity sensor, the extended arm in-position proximity sensor, the extended arm deceleration proximity sensor, the dropped arm proximity sensor and the raised arm proximity sensor are all connected to the PLC input end.

[0007] Further, the protection circuit unit includes a DC / AC module working relay, the coil of the DC / AC module working relay is connected to the output end of the PLC, and its make contact is connected to the input end of the DC / AC module; the telescopic drive circuit unit includes a first relay, a second relay and a third relay, the coils of the first relay, the second relay and the third relay are respectively connected to the output end of the PLC, and the make contacts of the first relay, the second relay and the third relay are respectively connected to the input end of the frequency converter; the lifting and lowering drive circuit unit includes a lifting cover contactor and a lowering cover contactor, the coils of the lifting cover contactor and the lowering cover contactor are respectively connected to the output end of the PLC, and the make contacts of the lifting cover contactor and the lowering cover contactor are connected in parallel between the output end of the DC / AC module and the lifting and lowering motor; a telescopic motor brake is provided on the lifting and lowering motor through the telescopic motor brake contactor KMB, the coil of the telescopic motor brake contactor KMB is connected to the output end of the PLC, and the make contact of the telescopic motor brake contactor KMB is connected between the output end of the DC / AC module and the telescopic motor brake.

[0008] Furthermore, the protection circuit unit is connected to a heat dissipation driving circuit unit, which includes a plurality of fans, and the fans are connected to the normally closed contacts of the working relay of the DC / AC module and the control power supply.

[0009] Furthermore, the panel of the vehicle-mounted operating box is provided with a one-touch cover lifting button, a one-touch cover lowering button and an emergency stop button with their own indicator lights, and both ends of the one-touch cover lifting button, the one-touch cover lowering button and the emergency stop button are respectively connected between the output end of the control power supply and the input end of the PLC.

[0010] Furthermore, the PLC is connected to a touch screen HMI and / or a wireless AP; when the touch screen HMI is connected to the PLC, the touch screen HMI is connected to a control power supply to obtain power; when the PLC is connected to a wireless AP, the wireless AP is connected to the control power supply to obtain power, and the wireless AP is communicatively connected to a ground unit.

[0011] Furthermore, it also includes a power supply unit and power connection devices arranged on both sides of the active end, the battery pack is connected to a charger, and the charger is connected to the power connection device.

[0012] Furthermore, the onboard operating box is provided with an emergency socket and a charging indicator light, and the emergency socket and the charging indicator light are connected to the charger.

[0013] Furthermore, the position detection unit, the vehicle-mounted operating box, the telescopic motor, the lifting and lowering motor and the electrical control cabinet are respectively connected through modular plug connectors.

[0014] The present invention provides a control method for a DCAC electric control system for mechanical intelligent capping of a hybrid vehicle based on the above technical solution, which comprises:

[0015] Control preparation: The battery pack supplies DC48V power to the input end of the DC / AC module. The DC / AC module self-checks and sends the self-check result to the PLC communication interface of the PLC through the communication cable. If the DC / AC module self-checks correctly, the PLC outputs a signal to the protection circuit unit, driving the DC / AC module working relay coil in the protection circuit unit to be energized and attracted. The DC / AC module working relay moving contact at the input end of the DC / AC module is closed, and the DC / AC module output end outputs AC380V power to the R, S, and T ends of the inverter, and the inverter starts to power on. If the DC / AC module self-checks incorrectly, the DC / AC module has no output, and the alarm information is fed back to the touch screen HMI, and the alarm information is synchronously sent to the ground unit through the wireless AP and displayed.

[0016] "One-key cover lifting" control: input the "one-key cover lifting" start signal to the PLC through the onboard operation box, touch screen HMI or ground unit, the PLC executes the cover lifting action program, outputs the signal to the lifting and lowering drive circuit unit, the cover lifting contactor coil in the lifting and lowering drive circuit unit is energized and attracted, the moving contact of the cover lifting contactor is closed, the lifting and lowering motor works forward, and drives the lifting and lowering arm worm gear mechanism in the capping device to start the cover lifting action. After the lifting and lowering sensor head at the tail of the capping device touches the lifting-in-place proximity sensor, the PLC input end position detection unit receives the lifting-in-place signal, and the PLC outputs the signal to the lifting and lowering drive circuit unit. The contactor coil loses power, the cover lifting contactor's moving contact opens, the lifting motor stops working, and the lifting arm worm gear mechanism ends the cover lifting action; the PLC starts to execute the telescopic motor opening brake action program, and the PLC outputs a signal to the telescopic motor brake contactor KMB coil. The telescopic motor brake contactor KMB coil is energized and attracted, and the telescopic motor brake contactor KMB's moving contact closes, driving the telescopic motor brake to open; at the same time, the PLC continues to execute the arm retraction action program, outputs a signal to the telescopic drive circuit unit, the first relay coil in the telescopic drive circuit unit is energized and attracted, and the first relay moving contact at the input end of the inverter is closed. The inverter outputs normal frequency, and the telescopic motor connected to the U, V, and W sides of the inverter output terminals rotates forward, driving the telescopic arm lead screw mechanism in the capping device to start the arm retraction action. After the telescopic induction head at the head of the capping device touches the arm retraction deceleration proximity sensor, the arm retraction deceleration signal in the position detection unit is sent to the PLC input terminal. The PLC executes the arm retraction deceleration action program and outputs a signal to the telescopic drive circuit unit. The third relay coil in the telescopic drive circuit unit is energized and the third relay moving contact at the inverter input terminal is closed. The inverter outputs low frequency, and the telescopic motor connected to the U, V, and W sides of the inverter output terminals rotates forward at a low speed. The telescopic arm lead screw mechanism in the capping device is driven to continue the arm retraction action. After the telescopic induction head at the head of the capping device touches the arm retraction proximity sensor, the arm retraction signal in the position detection unit is sent to the PLC input end, and the telescopic motor brake contactor KMB coil at the PLC output end is energized and de-energized, and the telescopic motor brake contactor KMB dynamic contact opens, and the telescopic motor brake is locked; at the same time, the first relay and the third relay coils in the telescopic drive circuit unit at the PLC output end are de-energized, and the first relay and the third relay dynamic contact at the inverter input end are disconnected, the inverter stops working, the telescopic motor stops rotating forward, and the one-button cover lifting action ends;

[0017] "One-key cover drop" control: input the "one-key cover drop" start signal to the PLC through the onboard operation box, touch screen HMI or ground unit, and the PLC starts to execute the telescopic motor opening brake action program. The PLC outputs a signal to the telescopic motor brake contactor KMB coil, and the telescopic motor brake contactor KMB coil is energized and attracted, and the telescopic motor brake contactor KMB dynamic contact is closed, driving the telescopic motor brake to open; at the same time, the PLC continues to execute the arm extension action program, outputs a signal to the telescopic drive circuit unit, and the second relay coil in the telescopic drive circuit unit is energized and attracted, and the second relay dynamic contact at the input end of the inverter is closed. The inverter outputs normal frequency, and the telescopic motor connected to the U, V, and W sides of the inverter output terminals reverses to drive the telescopic arm lead screw mechanism in the capping device to start the arm extension action. After the telescopic induction head at the head of the capping device touches the arm extension deceleration proximity sensor, the arm extension deceleration signal in the position detection unit is sent to the PLC input terminal. The PLC executes the arm extension deceleration action program and outputs a signal to the telescopic drive circuit unit. The third relay coil in the telescopic drive circuit unit is energized and energized, and the third relay moving contact at the inverter input terminal is closed. The inverter outputs low frequency, and the telescopic motor connected to the U, V, and W sides of the inverter output terminals reverses at a low speed. The telescopic arm lead screw mechanism in the driving capping device continues to extend the arm. After the telescopic induction head at the head of the capping device touches the arm-in-place proximity sensor, the arm-in-place signal in the position detection unit is sent to the PLC input end, and the telescopic motor brake contactor KMB coil at the PLC output end is energized and de-energized, the telescopic motor brake contactor KMB dynamic contact opens, and the telescopic motor brake is locked; at the same time, the second relay and the third relay coils in the telescopic drive circuit unit at the PLC output end are de-energized, the second relay and the third relay dynamic contact at the inverter input end are disconnected, the inverter stops working, and the telescopic motor stops reversing; the PLC continues to execute the capping Action program, output signal to the lifting and dropping driving circuit unit, the cover drop contactor coil in the lifting and dropping driving circuit unit is energized and attracted, the cover drop contactor moving contact is closed, the lifting and dropping motor works in reverse, and drives the lifting and dropping arm worm gear mechanism in the capping device to start the cover drop action, after the lifting and dropping induction head at the tail of the capping device touches the drop-in-place proximity sensor, the PLC input end position detection unit receives the drop-in-place signal, and the PLC outputs a signal to the lifting and dropping driving circuit unit, the cover drop contactor coil in the lifting and dropping driving circuit unit loses power, the cover drop contactor moving contact is opened, the lifting and dropping motor stops working, the lifting and dropping arm worm gear mechanism ends the cover drop action, and the one-button cover drop action ends;

[0018] "Lift" inching control: send the "lift" start signal to the PLC through the onboard operation box, touch screen HMI or ground unit, the PLC executes the cover lifting action program, outputs the signal to the lifting and lowering drive circuit unit, the cover lifting contactor coil in the lifting and lowering drive circuit unit is energized and attracted, the moving contact of the cover lifting contactor is closed, the lifting and lowering motor works forward, and drives the lifting and lowering arm worm gear mechanism in the capping device to start the cover lifting action. When the onboard operation box, touch screen HMI or ground unit sends the "lift" stop signal to the PLC, the PLC output end controls the lifting and lowering drive circuit unit to lose power, the lifting and lowering contact of the cover lifting contactor opens, and the forward rotation of the lifting and lowering motor stops immediately; or when the lifting and lowering induction head device at the tail of the capping device touches the lifting-in-place proximity sensor, the position detection unit at the PLC input end receives the lifting-in-place signal, and the PLC outputs a signal to the lifting and lowering drive circuit unit, the cover lifting contactor coil in the lifting and lowering drive circuit unit loses power, the moving contact of the cover lifting contactor opens, the lifting and lowering motor stops working, and the lifting and lowering arm worm gear mechanism ends the cover lifting action;

[0019] "Retract" inching control: send the "retract" start signal to the PLC through the onboard operation box, touch screen HMI or ground unit, and the PLC starts to execute the telescopic motor opening brake action program, and the PLC outputs a signal to the telescopic motor brake contactor KMB coil, the telescopic motor brake contactor KMB coil is energized and attracted, and the telescopic motor brake contactor KMB dynamic contact is closed, driving the telescopic motor brake to open; at the same time, the PLC executes the arm retraction action program, outputs a signal to the telescopic drive circuit unit, the first and third relay coils in the telescopic drive circuit unit are energized and attracted, the first and third relay dynamic contact of the inverter input end is closed, the inverter outputs a low frequency, and the telescopic motor connected to the U, V, W side of the inverter output end rotates forward at a low speed The telescopic arm screw mechanism in the capping device is driven to continue the arm retraction action. After the telescopic induction head at the head of the capping device touches the arm retraction proximity sensor, the arm retraction signal in the position detection unit is sent to the PLC input end, and the telescopic motor brake contactor KMB coil at the PLC output end is energized and de-energized, and the telescopic motor brake contactor KMB dynamic contact opens, and the telescopic motor brake is locked; at the same time, the first relay and the third relay coils in the telescopic drive circuit unit at the PLC output end are de-energized, and the first relay and the third relay dynamic contact at the inverter input end are disconnected, the inverter stops working, and the telescopic motor stops rotating forward; if the onboard operation box, touch screen HMI or ground unit sends the "retract" stop signal to the PLC, the PLC controls the capping device to stop the arm retraction action immediately;

[0020] "Extend" inching control: send the "extend" start signal to the PLC through the onboard operation box, touch screen HMI or ground unit, and the PLC starts to execute the telescopic motor opening brake action program, and the PLC outputs a signal to the telescopic motor brake contactor KMB coil, the telescopic motor brake contactor KMB coil is energized and attracted, and the telescopic motor brake contactor KMB dynamic contact is closed, driving the telescopic motor brake to open; at the same time, the PLC executes the arm extension action program, outputs a signal to the telescopic drive circuit unit, the second and third relay coils in the telescopic drive circuit unit are energized and attracted, the second and third relay dynamic contact of the inverter input end is closed, the inverter outputs a low frequency, and the telescopic motor connected to the U, V, W side of the inverter output end is reversed at low speed The telescopic arm screw mechanism in the capping device is driven to continue the arm extension action. After the telescopic induction head at the head of the capping device touches the arm extension proximity sensor, the arm extension signal in the position detection unit is sent to the PLC input end, and the telescopic motor brake contactor KMB coil at the PLC output end is energized and de-energized, and the telescopic motor brake contactor KMB dynamic contact opens, and the telescopic motor brake is locked; at the same time, the second relay and the third relay coils in the telescopic drive circuit unit at the PLC output end are de-energized, and the second relay and the third relay dynamic contact at the inverter input end are disconnected, the inverter stops working, and the telescopic motor stops reversing; if the onboard operation box, touch screen HMI or ground unit sends the "extend" stop signal to the PLC, the PLC controls the capping device to immediately stop the arm extension action;

[0021] "Drop" inching control: send the "drop" start signal to the PLC through the onboard operation box, touch screen HMI or ground unit, the PLC executes the cover drop action program, outputs a signal to the lifting and dropping drive circuit unit, the cover drop contactor coil in the lifting and dropping drive circuit unit is energized and attracted, the cover drop contactor moving contact is closed, the lifting and dropping motor works in reverse, and drives the lifting and dropping arm worm gear mechanism in the capping device to start the cover drop action. After the lifting and dropping induction head at the tail of the capping device touches the drop-in-place proximity sensor, the PLC input end position detection unit receives the drop-in-place signal, and the PLC outputs a signal to the lifting and dropping drive circuit unit. The cover drop contactor coil in the lifting and dropping drive circuit unit loses power, the cover drop contactor moving contact is opened, the drop motor stops working, and the lifting and dropping arm worm gear mechanism ends the cover drop action; if the onboard operation box, touch screen HMI or ground unit sends the "drop" stop signal to the PLC, the PLC controls the capping device to stop the cover drop action immediately;

[0022] "Emergency stop" control: Input the "Emergency stop" start signal to the PLC through the onboard operation box, touch screen HMI or ground unit, the PLC executes the program, and the PLC outputs a signal to de-energize the DC / AC module working relay coil, disconnect the DC / AC module working relay moving contact, and the system stops working.

[0023] Compared with the existing technology, the DCAC electric control system for mechanical intelligent capping of mixed iron vehicles described in the present invention has a simple and reasonable design. It uses a DC / AC module to provide AC power, uses a wireless AP terminal to realize remote centralized control or local onboard control box, HMI to control the frequency conversion-PLC control system, and uses a mechanical transmission drive mechanism to realize one-key automatic capping and removal of the capping device and jog the various sub-parts. The on-board touch screen and the host computer provide real-time feedback on the current working status, the health status of each on-board equipment and other information, providing visual safe operation guarantee for the capping electrical control system and operators, and the control is safe and reliable. At the same time, each unit of the control system adopts a modular installation method, which solves the rapid relocation and various fault handling of the capping device and the electric control system, and greatly saves the production and maintenance costs of the iron cans. After application, the electric control system has a short action cycle time, a low failure rate, and convenient maintenance, which effectively guarantees the production needs of the capping operation of the mixed iron vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the present invention being arranged on a mixed-rail vehicle;

[0025] Figure 2 is an enlarged schematic diagram of the capping device in the present invention;

[0026] Figure 3 This is a schematic diagram of the control process of the electric control system of the present invention;

[0027] Figure 4 This is a schematic diagram of the main interface of the touch screen HMI in the present invention;

[0028] Figure 5 It is a schematic diagram of the touch screen HMI action state and the inching interface in the present invention;

[0029] Figure 6 This is a schematic diagram of the onboard operation box panel of the present invention;

[0030] Figure 7 This is a control principle diagram of the DC / AC system in the present invention;

[0031] Figure 8 It is a modular schematic diagram of the electric control system of the present invention;

[0032] In the figure: 1. Covering device; 2. Electrical control cabinet; 3. Vehicle-mounted operating box; 4. Power supply unit; 5. Power connection device; 6. Telescopic motor; 7. Lifting motor; 8. Retracted arm in place proximity sensor; 9. Retracted arm deceleration proximity sensor; 10. Extended arm in place proximity sensor; 11. Extended arm deceleration proximity sensor; 12. Dropped arm in place proximity sensor; 13. Lifted arm in place proximity sensor; 14. Telescopic arm lead screw mechanism; 15. Lifting arm worm gear mechanism; 16. Lifting sensor head; 17. Telescopic sensor head; 18. Charger; 19. Battery pack; 20. Control power supply unit; 21. Wireless AP; 22. PLC; 23. Touch screen HMI; 24 , position detection unit; 25, DC / AC module; 26, protection circuit unit; 27, heat dissipation drive circuit unit; 28, telescopic drive circuit unit; 29, lifting and lowering drive circuit unit; 30, inverter; 31, PLC communication interface; 32, module plug connector; 33, emergency socket; 34, charging indicator light; 35, emergency stop button; 36, one-touch cover lifting button; 37, one-touch cover lowering button; 38, lifting and lowering motor overload relay; 39, telescopic motor brake contactor KMB; 40, telescopic motor brake; 41, fan; 44, active end; 45, driven end; 46, tank body; 47, tank mouth; 48, tank cover; 49, ground unit. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention. Unless otherwise defined, the technical terms or scientific terms used herein should be the usual meanings understood by people with general skills in the field to which the present disclosure belongs. "Up", "down", "left", "right", "front", "back" and the like used in the patent application specification and claims of the present disclosure are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship also changes accordingly; "connected" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The parts not described in detail in the present invention are all known technologies of technicians in the field of this technology.

[0034] Embodiment 1:

[0035] like Figures 1 to 8As shown, the present invention is a mechanical intelligent capping DCAC electric control system for a mixed-iron vehicle, wherein the mixed-iron vehicle comprises an active end 44, a driven end 45, and a tank body 46 disposed therebetween and having a tank opening 47, wherein a tank cover 48 is movably disposed at the tank opening 47, the active end 44 comprises a dust cover, a capping device 1 is disposed on the dust cover, a position detection unit 24 is disposed at the capping device 1, and is used to detect the position of the capping device 1 during operation, the capping device 1 comprises a lifting motor 7, a lifting arm worm gear mechanism 15 is disposed at the output end of the lifting motor 7, a telescopic arm lead screw mechanism 14 is disposed at the top of the lifting arm worm gear mechanism 15, the rear end and the front end of the telescopic arm lead screw mechanism 14 are respectively connected to the telescopic motor 6 and the tank cover 48, and the middle part is connected to the top of the dust cover The telescopic arm lead screw mechanism 14 can be moved up and down through the action of the lifting and lowering motor 7 and the lifting and lowering arm worm gear mechanism 15, so that the tank cover 48 can be moved up and down to realize the lifting and lowering operations. The tank cover 48 can be moved forward and backward through the telescopic motor 6 and the telescopic arm lead screw mechanism 14 to realize the arm extension and retraction operations; the electric control system also includes an electrical control cabinet 2 and a vehicle-mounted operating box 3, and a battery pack 19, a PLC 22, a DC / AC module 25, a protection circuit unit 26, a telescopic drive circuit unit 28, a lifting and lowering drive circuit unit 29 and a frequency converter 30 are installed in the electrical control cabinet 2; the battery pack 19 adopts a lithium iron phosphate battery with a capacity of 30KWh and is provided with a DC48V / DC24 V dual output, the DC48V output end is connected to the DC / AC module 25 input end to provide power for the DC / AC module 25, and the other DC24V output end is used as the control power supply unit 20 and is connected to the PLC22 to provide control power for the PLC22; the PLC22 input end is connected to the vehicle-mounted operation box 3, the position detection unit 24 and the PLC communication interface 31, and its output end is respectively connected to the protection circuit unit 26, the telescopic drive circuit unit 28 and the lifting and lowering drive circuit unit 29; the vehicle-mounted operation box 3 is used to input control instructions to the PLC22 for local control, and its panel is provided with a one-key cover lifting button 36 with its own indicator light, a one-key cover lowering button 37 and an emergency stop button 35, and a one-key cover lifting button 36. Both ends of the one-touch cover-dropping button 37 and the emergency stop button 35 are respectively connected between the output end of the control power supply 20 and the input end of the PLC 22. The vehicle-mounted operation box 3 can be respectively provided with one on the left and right sides of the active end for easy operation; the protection circuit unit 26 is connected to the input end of the DC / AC module 25 to drive and protect the DC / AC module 25. The output end of the DC / AC module 25 is respectively connected to the frequency converter 30 and the lifting and lowering driving circuit unit 29 to provide power for the frequency converter 30 and the lifting and lowering driving circuit unit 29. The lifting and lowering driving circuit unit 29 is connected to the lifting and lowering motor 7; the telescopic driving circuit unit 28 is connected to the input end of the frequency converter 30; the output end of the frequency converter 30 is connected to the telescopic motor 6;The battery pack 19, DC / AC module 25 and inverter 30 all include RS-485 communication interfaces and are connected to PLC communication interface 31 through communication cables, respectively, for reading, uploading and screen monitoring of information of the battery pack, DC / AC module 25 and inverter; the DC / AC module itself has low power consumption, meets the long standby requirements, and the output power is not less than 5.5KW. The PLC22 can use Siemens S7-200Smart series PLC, including AI / AO, wireless AP module, etc. for monitoring vehicle-mounted equipment temperature, speed, input / output voltage, current information, action position and other information, as well as master-slave communication to achieve remote control, information uploading, etc. The inverter 30 uses ABB series inverter. ;

[0036] In this embodiment, the position detection unit 24 includes a retracted arm in-position proximity sensor 8, a retracted arm deceleration proximity sensor 9, an extended arm in-position proximity sensor 10 and an extended arm deceleration proximity sensor 11 arranged along the telescopic arm screw mechanism 14, and a dropped arm proximity sensor 12 and a raised arm proximity sensor 13 arranged along the lifting and lowering arm worm gear mechanism 15. The front and rear sides of the telescopic arm screw mechanism 14 are respectively provided with a telescopic sensing head 17 and a lifting and lowering sensing head 16. The retracted arm in-position proximity sensor 8, the retracted arm deceleration proximity sensor 9, the extended arm in-position proximity sensor 10, the extended arm deceleration proximity sensor 11, the dropped arm proximity sensor 12 and the raised arm proximity sensor 13 adopt PNP three-wire high-temperature resistant proximity sensors, and are respectively connected to the input end of PLC22 through lines to assist PLC22 in achieving precise control positioning and motion deceleration.

[0037] In this embodiment, the protection circuit unit 26 includes a DC / AC module working relay K1, the coil of the DC / AC module working relay K1 is connected to the output end of the PLC22, and its moving contact is connected to the input end of the DC / AC module 25; the telescopic drive circuit unit 28 includes a first relay KA1, a second relay KA2 and a third relay KA3, the coils of the first relay KA1, the second relay KA2 and the third relay KA3 are respectively connected to the output end of the PLC22, and the moving contacts of the first relay KA1, the second relay KA2 and the third relay KA3 are respectively connected to the input end of the inverter 30; the lifting and lowering drive circuit unit 28 includes a first relay KA1, a second relay KA2 and a third relay KA3, the coils of the first relay KA1, the second relay KA2 and the third relay KA3 are respectively connected to the output end of the PLC22, and the moving contacts of the first relay KA1, the second relay KA2 and the third relay KA3 are respectively connected to the input end of the inverter 30; 9 includes a cover lifting contactor KM1 and a cover dropping contactor KM2, the coils of which are connected to the output end of PLC22 respectively, and the normally closed contacts of the cover lifting contactor KM1 and the cover dropping contactor KM2 are connected in parallel between the output end of the DC / AC module 25 and the lifting and dropping motor 7; the lifting and dropping motor 7 is provided with a telescopic motor brake 40 through a telescopic motor brake contactor KMB39, the coil of which is connected to the output end of PLC22, and the normally closed contact of the telescopic motor brake contactor KMB39 is connected between the output end of the DC / AC module 25 and the telescopic motor brake 40.

[0038] In this embodiment, a lifting motor overload relay 38 is also provided in the electric control system to protect the lifting motor 7. The normally closed contact of the DC / AC module 25 is connected to the input end of the PLC 22, and the coil of the lifting motor overload relay 38 is connected to the line between the DC / AC module 25 and the lifting motor 7.

[0039] In order to facilitate the heat dissipation requirements of various components in the electrical control cabinet 2, the protection circuit unit 26 is connected to a heat dissipation drive circuit unit 27, and the heat dissipation drive circuit unit 27 includes a plurality of fans 41, and the fans 41 are connected to the moving contacts of the DC / AC module working relay K1 and the control power supply 20.

[0040] In this embodiment, the PLC22 may also be connected to a touch screen HMI23, and the touch screen HMI23 communicates with the PLC22 to complete the local operation of adding and removing the cover. The touch screen HMI23 may be installed on the front door of the electrical control cabinet 2, and connected to the control power supply 20 to obtain power. At the same time, it is connected to the PLC22 through a DP9 / RS-485 communication line to achieve communication. Relevant programs for the control of the mixed iron car are set in advance, and various types of information from various devices, sensors, etc. are received and displayed; Figure 4 and Figure 5The diagram shows the touch screen HMI main interface and action status and inching interface diagram; the HMI main interface is provided with "Home", "Maintenance", "I / O Page", "Alarm" and other sub-screen switching buttons; the "Home" is provided with a "Battery Information" box, which can provide real-time feedback on the battery pack 19 current, output voltage, remaining power, health and remaining capacity, and a "DC / AC Information" box, which can provide real-time feedback on the DC / AC module 29 temperature, input voltage, output voltage and output current, and a "Frequency Converter Information" box, which can provide real-time feedback on the inverter forward rotation, inverter reverse transmission status and inverter working frequency in the inverter 30, and the home page is also provided with a real-time animation screen for adding covers, as well as flashing indications of "lifting cover" and "dropping cover", and constant indications of "completed" and "timeout". The home page is also equipped with "one-key cover lifting", "one-key cover dropping", "reset" and other buttons for local system control; the "Maintenance" page is provided with a "Car The "vehicle-mounted sensor X-axis" information box can provide real-time feedback on the action position information of the telescopic arm of the capping device in the capping device 1, including the constant-light indications of "extended in place", "retracted in place", "extended arm deceleration" and "retracted arm deceleration". There is a "vehicle-mounted sensor Y-axis" information box, which can provide real-time feedback on the action position information of the capping device lifting and dropping cover in the capping device 1, including the constant-light indications of "lifted in place" and "dropped in place". There is also an "equipment operation" information box, which can realize the on-site automatic control system, and is divided into "jog mode", "lift", "drop", "extend" and "retract". In the jog mode, by pressing the four buttons respectively, the mechanism can complete the step-by-step actions of lifting, dropping, extending and retracting; the alarm page reflects the mechanism action fault record information; the I / O page can check the position status of the emergency stop button, the action status of one-button lifting and one-button dropping, the working status of the proximity sensors such as lifting in place, dropping in place, retracting arm deceleration, retracting in place, extending arm deceleration and extending in place.

[0041] In this embodiment, the electronic control system can also be controlled by remote control. The PLC22 can also be connected to a wireless AP21, which is connected to the control power supply 20 to obtain power. The wireless AP21 is communicatively connected to a ground unit 49, and the ground unit 49 is provided with a host computer. By connecting to the wireless AP21 of each mixed-iron vehicle, various information of the corresponding mixed-iron vehicle can be obtained, and corresponding instructions or information can be sent to the mixed-iron vehicle to realize remote control and monitoring. In addition, multiple mixed-iron vehicles can be controlled by one ground unit, and only communication needs to be established, thereby reducing the number of operators and ensuring the safety of the operators.

[0042] In this embodiment, it also includes a power supply unit 4 and a power connection device 5 arranged on both sides of the active end. The battery pack 19 is connected to a charger 18, and the charger 18 is connected to the power connection device 5 for charging the battery pack. In addition, the onboard operating box 3 is provided with an emergency socket 33 and a charging indicator light 34, and the emergency socket 33 and the charging indicator light 34 are connected to the charger 18 and can be used for emergency charging.

[0043] In this embodiment, in order to facilitate the rapid installation and maintenance of the various units of the electric control system, the position detection unit 24, the vehicle-mounted operating box 3, the telescopic motor 6, the lifting and lowering motor 7 and the electrical control cabinet 2 are respectively connected through a modular plug connector 32.

[0044] In this embodiment, when operating through the onboard operation box 3, the one-touch cover lifting button 36 is pressed, the indicator light starts to flash, the lifting and lowering motor 7 works, and drives the lifting and lowering arm worm gear mechanism 15 in the capping device 1 to start the cover lifting action. After the lifting and lowering sensor head 16 device at the tail of the capping device 1 touches the lifting-in-place proximity sensor 13, the lifting and lowering motor 7 stops working, the inverter 30 outputs a normal frequency, and the telescopic motor 6 works to drive the telescopic arm screw mechanism 14 in the capping device 1 to start the arm retraction action. After the telescopic sensor head 17 device at the head of the capping device 1 touches the retraction arm deceleration proximity sensor 9, the inverter 30 outputs a low frequency, the speed of the telescopic motor 6 decreases, and the telescopic motor 6 stops working after touching the retraction arm proximity sensor 8, the one-touch cover lifting action ends, and the one-touch cover lifting button 36 indicator light is always on; press one Press the cover-dropping button 37, the indicator light of the cover-lifting button 36 goes out, the indicator light of the cover-dropping button 37 flashes, the frequency converter 30 outputs normal frequency, the telescopic motor 6 works to drive the telescopic arm screw mechanism 14 in the capping device 1 to start the arm extension action, and after the telescopic induction head 17 device at the head of the capping device 1 touches the arm extension deceleration proximity sensor 11, the frequency converter 30 outputs low frequency, the speed of the telescopic motor 6 decreases, and after touching the arm extension proximity sensor 10, the telescopic motor 6 stops working, and the cover-lifting motor 7 in the capping device 1 starts working, driving the worm gear mechanism 15 of the cover-lifting arm to start the cover-dropping action, and after the lift-down induction head 16 device at the tail of the capping device 1 touches the fall-in-place proximity sensor 12, the lift-down motor 7 stops working, the cover-dropping action is completed, and the indicator light of the cover-dropping button 37 is always on. When the capping device 1 is working, the emergency stop button 35 can be pressed in case of an emergency, and the action will stop immediately. The emergency charging socket 33 and the charging indicator light 34 on the panel of the vehicle-mounted operating box 3 are connected to the emergency charging socket 33 on the panel of the vehicle-mounted operating box 3 through the power plug in the AC380V power supply in the ground power supply 4. The battery pack 19 can be charged in an emergency through the charger 18. When charging, the charging indicator light 34 lights up. In addition, the onboard operating box 3 can also be set with buttons such as "jog mode", "lift", "drop", "extend", and "retract" in the touch screen HMI maintenance page, and equipped with corresponding indicator lights, etc., for local jog control.

[0045] Embodiment 2:

[0046] The present invention is a control method for the mechanical intelligent capping DCAC electric control system for a hybrid vehicle based on the embodiment 1, which is described by the vehicle-mounted operation box 3, the touch screen HMI23 and the ground unit 49 control of the electric control system. The three methods can be operated separately or in coordination. Each method is now described one by one:

[0047] Control preparation: the battery pack 19 supplies DC48V power to the input end of the DC / AC module 25, the DC / AC module 25 self-checks and sends the self-check result to the PLC communication interface 31 of the PLC22 through the communication cable. If the DC / AC module 25 self-checks correctly, the PLC22 outputs a signal to the protection circuit unit 26, driving the DC / AC module working relay K1 coil in the protection circuit unit 26 to be energized and attracted, and the DC / AC module working relay K1 at the input end of the DC / AC module 25 closes its moving contact, and the DC / AC module 25 outputs AC380V power to the R, S, and T ends of the inverter 30, and the inverter 30 starts to power on; if the DC / AC module 25 self-checks incorrectly, the DC / AC module 25 has no output, and feeds back the alarm information to the touch screen HMI23, and simultaneously sends the alarm information to the ground unit 49 through the wireless AP21 and displays it;

[0048] On-site operation of vehicle operation box 3:

[0049] "One-key cover lifting" control: Press the one-key cover lifting button 36 on the panel of the onboard operation box 3 to send the "one-key cover lifting" start signal to the input end of PLC22. PLC22 executes the cover lifting action program and outputs a signal to the lifting and lowering drive circuit unit 29. The cover lifting contactor KM1 coil in the lifting and lowering drive circuit unit 29 is energized and attracted, and the moving contact of the cover lifting contactor KM1 is closed. The lifting and lowering motor 7 works forward, driving the lifting and lowering arm worm gear mechanism 15 in the capping device 1 to start the cover lifting action. After the lifting and lowering sensor head 16 at the tail of the capping device 1 touches the lifting-in-place proximity sensor 13, the position detection unit 24 at the input end of PLC22 receives the lifting-in-place signal, and PLC22 outputs a signal to the lifting and lowering drive circuit unit 29. The lifting and lowering contactor KM1 in the lifting and lowering drive circuit unit 29 The contactor KM1 coil loses power, the closing contact of the cover lifting contactor KM1 opens, the lifting motor 7 stops working, and the lifting arm worm gear mechanism 15 ends the cover lifting action; PLC22 starts to execute the telescopic motor 6 to open the brake action program, PLC22 outputs a signal to the telescopic motor brake contactor KMB39 coil, the telescopic motor brake contactor KMB39 coil is energized and attracted, the closing contact of the telescopic motor brake contactor KMB39 is closed, and the telescopic motor brake 40 is driven to open; at the same time, PLC22 continues to execute the arm retracting action program, outputs a signal to the telescopic drive circuit unit 28, the first relay KA1 coil in the telescopic drive circuit unit 28 is energized and attracted, and the closing contact of the first relay KA1 at the input end of the inverter 30 is closed, The frequency converter 30 outputs a normal frequency, and the telescopic motor 6 connected to the U, V, and W sides of the output terminals of the frequency converter 30 rotates forward, driving the telescopic arm screw mechanism 14 in the capping device 1 to start the arm retracting action. After the telescopic induction head 17 at the head of the capping device 1 touches the arm retracting deceleration proximity sensor 9, the arm retracting deceleration signal in the position detection unit 24 is sent to the input terminal of the PLC22, and the PLC22 executes the arm retracting deceleration action program and outputs a signal to the telescopic drive circuit unit 28. The coil of the third relay KA3 in the telescopic drive circuit unit 28 is energized and attracted, and the moving contact of the third relay KA3 at the input terminal of the frequency converter 30 is closed. The frequency converter 30 outputs a low frequency, and the telescopic motor 6 connected to the U, V, and W sides of the output terminals of the frequency converter 30 rotates forward at a low speed, driving the capping device 1. The telescopic arm screw mechanism 14 in the cover device 1 continues to retract the arm, and after the telescopic induction head 17 at the head of the cover device 1 touches the retracted arm proximity sensor 8, the retracted arm in place signal in the position detection unit 24 is sent to the input end of the PLC22, and the telescopic motor brake contactor KMB39 coil at the output end of the PLC22 is energized and de-energized, the telescopic motor brake contactor KMB39 dynamic contact opens, and the telescopic motor brake 40 is locked; at the same time, the first relay KA1 and the third relay KA3 coils in the telescopic drive circuit unit 28 at the output end of the PLC22 are de-energized, and the first relay KA1 and the third relay KA3 dynamic contact at the input end of the inverter 30 are disconnected, the inverter 30 stops working, the telescopic motor 6 stops rotating forward, and the one-button cover lifting action ends;

[0050] "One-key cover drop" control: Press the one-key cover drop button 37 on the panel of the onboard operation box 3 to send the "one-key cover drop" start signal to the input end of PLC22, and PLC22 starts to execute the telescopic motor 6 to open the brake action program, and PLC22 outputs a signal to the telescopic motor brake contactor KMB39 coil, the telescopic motor brake contactor KMB39 coil is energized and attracted, and the moving contact of the telescopic motor brake contactor KMB39 is closed, driving the telescopic motor brake 40 to open; at the same time, PLC22 continues to execute the arm extension action program and outputs a signal to The telescopic drive circuit unit 28, the coil of the second relay KA2 in the telescopic drive circuit unit 28 is energized and attracted, the moving contact of the second relay KA2 at the input end of the frequency converter 30 is closed, the frequency converter 30 outputs a normal frequency, and the telescopic motor 6 connected to the U, V, and W sides of the output ends of the frequency converter 30 reverses to drive the telescopic arm lead screw mechanism 14 in the capping device 1 to start the arm extension action. After the telescopic induction head 17 at the head of the capping device 1 hits the arm extension deceleration proximity sensor 11, the arm extension deceleration signal in the position detection unit 24 is sent to the input end of the PLC22. PLC22 executes the arm extension deceleration action program and outputs a signal to the telescopic drive circuit unit 28. The coil of the third relay KA3 in the telescopic drive circuit unit 28 is energized and attracted. The moving contact of the third relay KA3 at the input end of the frequency converter 30 is closed. The frequency converter 30 outputs a low frequency. The telescopic motor 6 connected to the U, V, and W sides of the output end of the frequency converter 30 reverses at a low speed, driving the telescopic arm lead screw mechanism 14 in the capping device 1 to continue the arm extension action. After the telescopic induction head 17 at the head of the capping device 1 touches the arm extension position proximity sensor 10, the position detection The arm reaching position signal in unit 24 is sent to the input end of PLC22, the coil of telescopic motor brake contactor KMB39 at the output end of PLC22 is energized and de-energized, the moving contact of telescopic motor brake contactor KMB39 is opened, and the telescopic motor brake 40 is locked; at the same time, the coils of the second relay KA2 and the third relay KA3 in the telescopic drive circuit unit 28 at the output end of PLC22 are de-energized, the moving contact of the second relay KA2 and the third relay KA3 at the input end of the frequency converter 30 is disconnected, the frequency converter 30 stops working, and the telescopic motor 6 stops reversing;PLC22 continues to execute the cover dropping action program, outputs a signal to the lifting and dropping driving circuit unit 29, the cover dropping contactor KM2 coil in the lifting and dropping driving circuit unit 29 is energized and attracted, the cover dropping contactor KM2 moving contact is closed, the lifting and dropping motor 7 works in reverse, and drives the lifting and dropping arm worm gear mechanism 15 in the capping device 1 to start the cover dropping action, after the lifting and dropping induction head 16 at the tail of the capping device 1 touches the drop-in-place proximity sensor 12, the PLC22 input end position detection unit 24 receives the drop-in-place signal, and PLC22 outputs a signal to the lifting and dropping driving circuit unit 29, the cover dropping contactor KM2 coil in the lifting and dropping driving circuit unit 29 loses power, the cover dropping contactor KM2 moving contact is opened, the lifting and dropping motor 7 stops working, the lifting and dropping arm worm gear mechanism 15 ends the cover dropping action, and the one-key cover dropping action ends;

[0051] "Emergency stop" control: Press the emergency stop button 35 on the panel of the vehicle operation box 3 to input the "emergency stop" start signal to PLC22, PLC22 executes the program, and PLC22 outputs a signal to make the DC / AC module working relay K1 coil de-energized, the DC / AC module working relay K1 moving contact is disconnected, and the system stops working.

[0052] The ground unit remotely controls "one-key lid lift" and "one-key lid drop":

[0053] The ground unit establishes communication with PLC22 through the on-board wireless AP21. The ground unit receives the information related to the controlled mixed-iron car, and sends control instructions through the on-board wireless AP21 and PLC22 to complete the "one-key cover lifting" or "one-key cover dropping" operation of the mixed-iron car capping device 1, and receives the action status and action information of the one-key cover lifting of the capping device 1 electronic control system in real time; the battery pack 19 power, current, and voltage information; the DC / AC module 25 temperature, output voltage, current, and input voltage information; the PLC22 input / output point status and the inverter 30 working frequency, current, and alarm information. Its remote control method is executed according to the "one-key cover lifting" or "one-key cover dropping" method in the on-site control of the on-board operation box 3, and includes the remote self-test process of "control preparation".

[0054] Touch screen HMI control:

[0055] Click "One-key cover lift" or "One-key cover drop" on the touch screen HMI23 homepage, and the control system can complete the corresponding control action. The control method is executed according to the "one-key cover lift" or "one-key cover drop" method in the on-site control of the vehicle-mounted operation box 3, and includes the "control preparation" self-test process. If an emergency occurs, click "Reset" on the touch screen homepage, and the system will stop working immediately; click "Maintenance" on the touch screen homepage to enter the sub-page, and click "Jog mode" in the "Equipment Operation" information box, that is, the control system enters the jog operation mode:

[0056] "Lift" inching control: Touch the "Lift" key with your finger for a long time to send the "Lift" start signal to PLC22, PLC22 executes the cover lifting action program, and outputs a signal to the lifting and lowering drive circuit unit 29. The lifting cover contactor KM1 coil in the lifting and lowering drive circuit unit 29 is energized and attracted, and the moving contact of the lifting cover contactor KM1 is closed, and the lifting and lowering motor 7 works forward, driving the lifting and lowering arm worm gear mechanism 15 in the capping device 1 to start the cover lifting action. When the finger leaves the "Lift" key on the touch screen HMI23, the "Lift" stop signal is sent to PLC22, and the output end of PLC22 controls the lifting and lowering drive The coil of the cover lifting contactor KM1 in the circuit unit 29 loses power, the moving contact of the cover lifting contactor KM1 opens, and the forward rotation of the lifting motor 7 stops immediately; or when the lifting and falling induction head 16 at the tail of the capping device 1 touches the lifting-in-place proximity sensor 13, the position detection unit 24 at the input end of the PLC22 receives the lifting-in-place signal, and the PLC22 outputs a signal to the lifting and falling drive circuit unit 29, the coil of the cover lifting contactor KM1 in the lifting and falling drive circuit unit 29 loses power, the moving contact of the cover lifting contactor KM1 opens, the lifting motor 7 stops working, and the lifting and falling arm worm gear mechanism 15 ends the cover lifting action;

[0057] "Retract" inching control: Touch the "Retract" key with your finger for a long time to send the "Retract" start signal to PLC22, and PLC22 starts to execute the telescopic motor 6 opening brake action program, and PLC22 outputs a signal to the telescopic motor brake contactor KMB39 coil, and the telescopic motor brake contactor KMB39 coil is energized and attracted, and the telescopic motor brake contactor KMB39 moving contact is closed, driving the telescopic motor brake 40 to open; at the same time, PLC22 executes the arm retracting action program, outputs a signal to the telescopic drive circuit unit 28, and the first relay KA1 and the third relay KA3 coils in the telescopic drive circuit unit 28 are energized and attracted, and the first relay KA1 and the third relay KA3 moving contact at the input end of the inverter 30 are closed, and the inverter 30 outputs a low frequency, and the telescopic motor 6 connected to the U, V, and W sides of the output end of the inverter 30 rotates forward at a low speed, driving the telescopic motor 40 to open. The telescopic arm screw mechanism 14 in the dynamic capping device 1 continues to retract the arm, and after the telescopic induction head 17 at the head of the capping device 1 touches the retracted arm proximity sensor 8, the retracted arm in place signal in the position detection unit 24 is sent to the input end of PLC22, and the telescopic motor brake contactor KMB39 coil at the output end of PLC22 is energized and de-energized, the telescopic motor brake contactor KMB39 dynamic contact opens, and the telescopic motor brake 40 is locked; at the same time, the first relay KA1 and the third relay KA3 coils in the telescopic drive circuit unit 28 at the output end of PLC22 are de-energized, and the first relay KA1 and the third relay KA3 dynamic contact at the input end of the inverter 30 are disconnected, the inverter 30 stops working, and the telescopic motor 6 stops rotating forward; if the finger leaves the "retract" key, the "retract" stop signal is sent to PLC22, and PLC22 controls the capping device 1 to stop the arm retracting action immediately;

[0058] "Extend" inching control: Touch the "Extend" key with your finger for a long time to send the "Extend" start signal to PLC22, PLC22 starts to execute the telescopic motor 6 opening brake action program, PLC22 outputs a signal to the telescopic motor brake contactor KMB39 coil, the telescopic motor brake contactor KMB39 coil is energized and attracted, the telescopic motor brake contactor KMB39 moving contact is closed, and the telescopic motor brake 40 is driven to open; at the same time, PLC22 executes the arm extension action program, outputs a signal to the telescopic drive circuit unit 28, the second relay KA2 and the third relay KA3 coils in the telescopic drive circuit unit 28 are energized and attracted, the second relay KA2 and the third relay KA3 moving contact at the input end of the inverter 30 are closed, the inverter 30 outputs a low frequency, and the telescopic motor 6 connected to the U, V, and W sides of the output end of the inverter 30 reverses at a low speed, driving The telescopic arm screw mechanism 14 in the capping device 1 continues to extend the arm, and after the telescopic induction head 17 at the head of the capping device 1 touches the arm-in-place proximity sensor 10, the arm-in-place signal in the position detection unit 24 is sent to the input end of PLC22, and the coil of the telescopic motor brake contactor KMB39 at the output end of PLC22 is energized and de-energized, the dynamic contact of the telescopic motor brake contactor KMB39 is opened, and the telescopic motor brake 40 is locked; at the same time, the coils of the second relay KA2 and the third relay KA3 in the telescopic drive circuit unit 28 at the output end of PLC22 are de-energized, and the dynamic contact of the second relay KA2 and the third relay KA3 at the input end of the inverter 30 is disconnected, the inverter 30 stops working, and the telescopic motor 6 stops reversing; if the finger leaves the "extend" key, the "extend" stop signal is sent to PLC22, and PLC22 controls the capping device 1 to immediately stop the arm extension action;

[0059] "Drop" inching control: Touch the "drop" key with your finger for a long time to send the "drop" start signal to PLC22, PLC22 executes the cover drop action program, and outputs a signal to the lift-drop drive circuit unit 29. The cover drop contactor KM2 coil in the lift-drop drive circuit unit 29 is energized and attracted, and the cover drop contactor KM2 moving contact is closed, and the lift-drop motor 7 works in reverse, driving the lift-drop arm worm gear mechanism 15 in the capping device 1 to start the cover drop action. After the lift-drop sensor head 16 at the tail of the capping device 1 touches the drop-in-place proximity sensor 12, the position detection unit 24 at the input end of PLC22 receives the drop-in-place signal, and PLC22 outputs a signal to the lift-drop drive circuit unit 29. The cover drop contactor KM2 coil in the lift-drop drive circuit unit 29 loses power, and the drop contactor KM2 moving contact is opened, the drop motor 7 stops working, and the lift-drop arm worm gear mechanism 15 ends the cover drop action. When the finger leaves the "drop" key, the capping device 1 immediately stops the cover drop action.

Claims

1. A mechanical intelligent capping DCAC electric control system for a mixed-iron vehicle, the mixed-iron vehicle comprising a driving end (44), a driven end (45), and a tank body (46) disposed therebetween and having a tank opening (47), a tank cover (48) being movably disposed at the tank opening (47), the driving end (44) comprising a dust cover, a capping device (1) being disposed on the dust cover, and a position detection unit (24) being disposed at the capping device (1), characterized in that: It also includes an electrical control cabinet (2) and a vehicle-mounted operating box (3), wherein a battery pack (19), a PLC (22), a DC / AC module (25), a protection circuit unit (26), a telescopic drive circuit unit (28), a lifting and lowering drive circuit unit (29) and a frequency converter (30) are installed in the electrical control cabinet (2); the capping device (1) includes a lifting and lowering motor (7), wherein the output end of the lifting and lowering motor (7) is provided with a lifting and lowering arm worm gear mechanism (15), the top of the lifting and lowering arm worm gear mechanism (15) is provided with a telescopic arm lead screw mechanism (14), and the rear end and front end of the telescopic arm lead screw mechanism (14) are respectively connected to the telescopic motor (6) and the tank cover (48); one output end of the battery pack (19) is connected to the input end of the DC / AC module (25), and the other output end is used as a control power supply (20) and is connected to the PLC (22); the PLC ( 22) The input end is connected to the vehicle-mounted operation box (3), the position detection unit (24) and the PLC communication interface (31), and the output end is respectively connected to the protection circuit unit (26), the telescopic drive circuit unit (28) and the lifting and lowering drive circuit unit (29); the protection circuit unit (26) is connected to the input end of the DC / AC module (25), the output end of the DC / AC module (25) is respectively connected to the frequency converter (30) and the lifting and lowering drive circuit unit (29), and the lifting and lowering drive circuit unit (29) is connected to the lifting and lowering motor (7); the telescopic drive circuit unit (28) is connected to the input end of the frequency converter (30); the output end of the frequency converter (30) is connected to the telescopic motor (6); the battery pack (19), the DC / AC module (25) and the frequency converter (30) are respectively connected to the PLC communication interface (31) via communication cables; The position detection unit (24) comprises a retracted arm in-position proximity sensor (8), a retracted arm deceleration proximity sensor (9), an extended arm in-position proximity sensor (10) and an extended arm deceleration proximity sensor (11) arranged along the telescopic arm lead screw mechanism (14), and a dropped arm in-position proximity sensor (12) and a raised arm in-position proximity sensor (13) arranged along the lifting and lowering arm worm gear mechanism (15), the telescopic arm lead screw mechanism (14) is provided with a telescopic sensing head (17) and a lifting and lowering sensing head (16) at the front and rear sides respectively, and the retracted arm in-position proximity sensor (8), the retracted arm deceleration proximity sensor (9), the extended arm in-position proximity sensor (10), the extended arm deceleration proximity sensor (11), the dropped arm in-position proximity sensor (12) and the raised arm in-position proximity sensor (13) are all connected to the input end of the PLC (22); The protection circuit unit (26) comprises a DC / AC module working relay (K1), the coil of the DC / AC module working relay (K1) being connected to the output end of the PLC (22), and the make contact thereof being connected to the input end of the DC / AC module (25); the telescopic drive circuit unit (28) comprises a first relay (KA1), a second relay (KA2) and a third relay (KA3), the coils of the first relay (KA1), the second relay (KA2) and the third relay (KA3) being connected to the output end of the PLC (22), and the make contacts of the first relay (KA1), the second relay (KA2) and the third relay (KA3) being connected to the input end of the frequency converter (30); the lifting and lowering drive circuit unit (29) comprising The invention comprises a cover lifting contactor (KM1) and a cover dropping contactor (KM2), wherein the coils of the cover lifting contactor (KM1) and the cover dropping contactor (KM2) are respectively connected to the output end of the PLC (22), and the moving contacts of the cover lifting contactor (KM1) and the cover dropping contactor (KM2) are connected in parallel between the output end of the DC / AC module (25) and the lifting and dropping motor (7); the lifting and dropping motor (7) is provided with a telescopic motor brake (40) via a telescopic motor brake contactor KMB (39), wherein the coil of the telescopic motor brake contactor KMB (39) is connected to the output end of the PLC (22), and the moving contacts of the telescopic motor brake contactor KMB (39) are connected between the output end of the DC / AC module (25) and the telescopic motor brake (40).

2. According to claim 1, a DCAC electric control system for mechanical intelligent capping of a hybrid vehicle is characterized by: The protection circuit unit (26) is connected to a heat dissipation drive circuit unit (27), the heat dissipation drive circuit unit (27) comprising a plurality of fans (41), and the fans (41) are connected to the moving contacts of the DC / AC module working relay (K1) and the control power supply (20).

3. The DCAC electric control system for mechanical intelligent capping of a hybrid vehicle according to claim 2 is characterized in that: A one-touch cover-lifting button (36), a one-touch cover-dropping button (37) and an emergency stop button (35) with their own indicator lights are arranged on the panel of the vehicle-mounted operating box (3), and two ends of the one-touch cover-lifting button (36), the one-touch cover-dropping button (37) and the emergency stop button (35) are respectively connected between the output end of the control power supply (20) and the input end of the PLC (22).

4. The DCAC electric control system for mechanical intelligent capping of a hybrid vehicle according to claim 3 is characterized by: The PLC (22) is connected to a touch screen HMI (23) and / or a wireless AP (21); when the touch screen HMI (23) is connected to the PLC (22), the touch screen HMI (23) is connected to a control power supply (20) to obtain power; when the PLC (22) is connected to a wireless AP (21), the wireless AP (21) is connected to the control power supply (20) to obtain power, and the wireless AP (21) is communicatively connected to a ground unit (49).

5. The DCAC electric control system for mechanical intelligent capping of a hybrid vehicle according to claim 4 is characterized in that: It also includes a power supply unit (4) and power connection devices (5) arranged on both sides of the active end. The battery pack (19) is connected to a charger (18), and the charger (18) is connected to the power connection device (5).

6. The DCAC electric control system for mechanical intelligent capping of a hybrid vehicle according to claim 5 is characterized in that: The vehicle-mounted operating box (3) is provided with an emergency socket (33) and a charging indicator light (34), and the emergency socket (33) and the charging indicator light (34) are connected to the charger (18).

7. The DCAC electric control system for mechanical intelligent capping of a hybrid vehicle according to claim 6 is characterized by: The position detection unit (24), the vehicle-mounted operating box (3), the telescopic motor (6), the lifting motor (7) and the electrical control cabinet (2) are respectively connected via modular plug connectors (32).

8. A control method for the DCAC electric control system for mechanical intelligent capping of a hybrid vehicle based on claim 7, characterized in that: include: Control preparation: the battery pack (19) supplies a DC48V power supply to the input end of the DC / AC module (25), the DC / AC module (25) performs a self-check and sends the self-check result to the PLC communication interface (31) of the PLC (22) through the communication cable. If the DC / AC module (25) performs a self-check and there is no error, the PLC (22) outputs a signal to the protection circuit unit (26), driving the coil of the DC / AC module working relay (K1) in the protection circuit unit (26) to be energized and attracted, the DC / AC module working relay (K1) at the input end of the DC / AC module (25) closes, and the output end of the DC / AC module (25) outputs an AC380V power supply to the R, S, and T ends of the inverter (30), and the inverter (30) starts to power on; if the DC / AC module (25) performs a self-check and there is an error, the DC / AC module (25) has no output, and feeds back an alarm message to the touch screen HMI (23), and synchronously sends the alarm message to the ground unit (49) through the wireless AP (21) and displays it; "One-key cover lifting" control: A "one-key cover lifting" start signal is input to the PLC (22) through the vehicle-mounted operation box (3), the touch screen HMI (23) or the ground unit (49). The PLC (22) executes the cover lifting action program and outputs a signal to the lifting and lowering drive circuit unit (29). The coil of the cover lifting contactor (KM1) in the lifting and lowering drive circuit unit (29) is energized and attracted. The moving contact of the cover lifting contactor (KM1) is closed, and the lifting and lowering motor (7) rotates forward to drive the lifting and lowering arm worm gear mechanism (15) in the cover adding device (1) to start the cover lifting action. After the lifting and lowering sensor head (16) at the tail of the cover adding device (1) touches the lifting position proximity sensor (13), the input end position detection unit (16) of the PLC (22) is turned on. 24) receiving the lifting position signal, the PLC (22) outputs a signal to the lifting and lowering drive circuit unit (29), the lifting cover contactor (KM1) coil in the lifting and lowering drive circuit unit (29) loses power, the moving contact of the lifting cover contactor (KM1) opens, the lifting and lowering motor (7) stops working, and the lifting and lowering arm worm gear mechanism (15) ends the lifting and lowering action; the PLC (22) starts to execute the telescopic motor (6) brake opening action program, the PLC (22) outputs a signal to the telescopic motor brake contactor KMB (39) coil, the telescopic motor brake contactor KMB (39) coil is energized and attracted, the moving contact of the telescopic motor brake contactor KMB (39) closes, and the telescopic motor brake (40) is driven to open;At the same time, the PLC (22) continues to execute the arm retracting action program and outputs a signal to the telescopic drive circuit unit (28). The coil of the first relay (KA1) in the telescopic drive circuit unit (28) is energized and attracted. The first relay (KA1) at the input end of the frequency converter (30) is closed, and the frequency converter (30) outputs a normal frequency. The telescopic motor (6) connected to the U, V, and W sides of the output end of the frequency converter (30) rotates forward, driving the telescopic arm lead screw mechanism (14) in the capping device (1) to start retracting. The arm moves, and after the telescopic induction head (17) at the head of the covering device (1) touches the arm retraction deceleration proximity sensor (9), the arm retraction deceleration signal in the position detection unit (24) is sent to the input end of the PLC (22), and the PLC (22) executes the arm retraction deceleration action program and outputs a signal to the telescopic drive circuit unit (28). The third relay (KA3) coil in the telescopic drive circuit unit (28) is energized and attracted, and the third relay (KA3) at the input end of the inverter (30) is closed, and the inverter (30) outputs a low frequency, and the telescopic motor (6) connected to the U, V, W side of the inverter (30) output terminal works in a low speed forward rotation, driving the telescopic arm lead screw mechanism (14) in the capping device (1) to continue the arm retraction action. After the telescopic induction head (17) at the head of the capping device (1) touches the arm retraction position proximity sensor (8), the arm retraction position signal in the position detection unit (24) is sent to the input end of the PLC (22), and the telescopic motor brake contactor KMB (39) coil at the output end of the PLC (22) is turned on. When the power is on or off, the moving contact of the telescopic motor brake contactor KMB (39) opens, and the telescopic motor brake (40) is locked; at the same time, the coils of the first relay (KA1) and the third relay (KA3) in the telescopic drive circuit unit (28) at the output end of the PLC (22) lose power, and the moving contacts of the first relay (KA1) and the third relay (KA3) at the input end of the frequency converter (30) are disconnected, the frequency converter (30) stops working, the forward rotation of the telescopic motor (6) stops, and the one-button cover lifting action ends; "One-touch cover drop" control: a "one-touch cover drop" start signal is input to the PLC (22) through the vehicle-mounted operation box (3), the touch screen HMI (23) or the ground unit (49), and the PLC (22) starts to execute the telescopic motor (6) opening brake action program, and the PLC (22) outputs a signal to the telescopic motor brake contactor KMB (39) coil, and the telescopic motor brake contactor KMB (39) coil is energized and attracted, and the moving contact of the telescopic motor brake contactor KMB (39) is closed, driving the telescopic motor brake (40) to open; at the same time, the PLC (22) continues to execute the arm extension action program, outputs a signal to the telescopic drive circuit unit (28), and the second relay (KA2) coil in the telescopic drive circuit unit (28) is energized and attracted, and the frequency converter ( The normally closed contact of the second relay (KA2) at the input end of the inverter (30) is closed, the inverter (30) outputs a normal frequency, and the telescopic motor (6) connected to the U, V, and W sides of the inverter (30) outputs reverse operation, driving the telescopic arm screw mechanism (14) in the capping device (1) to start the arm extension action. After the telescopic sensing head (17) at the head of the capping device (1) hits the arm extension deceleration proximity sensor (11), the arm extension deceleration signal in the position detection unit (24) is sent to the input end of the PLC (22), and the PLC (22) executes the arm extension deceleration action program and outputs a signal to the telescopic drive circuit unit (28), the coil of the third relay (KA3) in the telescopic drive circuit unit (28) is energized and attracted, the moving contact of the third relay (KA3) at the input end of the frequency converter (30) is closed, the frequency converter (30) outputs a low frequency, and the telescopic motor (6) connected to the U, V, W side of the output end of the frequency converter (30) works in a low-speed reverse direction, driving the telescopic arm lead screw mechanism (14) in the capping device (1) to continue the arm extension action, and after the telescopic sensing head (17) at the head of the capping device (1) touches the arm extension position proximity sensor (10), the arm extension position signal in the position detection unit (24) is sent to P The coil of the telescopic motor brake contactor KMB (39) at the input end of the LC (22) and the output end of the PLC (22) is energized or de-energized, the make contact of the telescopic motor brake contactor KMB (39) is opened, and the telescopic motor brake (40) is locked; at the same time, the coils of the second relay (KA2) and the third relay (KA3) in the telescopic drive circuit unit (28) at the output end of the PLC (22) are de-energized, the make contacts of the second relay (KA2) and the third relay (KA3) at the input end of the frequency converter (30) are opened, the frequency converter (30) stops working, and the telescopic motor (6) stops rotating in reverse;The PLC (22) continues to execute the cover drop action program and outputs a signal to the lifting and dropping driving circuit unit (29). The coil of the cover drop contactor (KM2) in the lifting and dropping driving circuit unit (29) is energized and attracted, and the moving contact of the cover drop contactor (KM2) is closed. The lifting and dropping motor (7) works in reverse, driving the lifting and dropping arm worm gear mechanism (15) in the capping device (1) to start the cover drop action. After the lifting and dropping sensing head (16) at the tail of the capping device (1) touches the falling position proximity sensor (12), the input end position detection unit (24) of the PLC (22) receives the falling position signal, and the PLC (22) outputs a signal to the lifting and dropping driving circuit unit (29). The coil of the cover drop contactor (KM2) in the lifting and dropping driving circuit unit (29) loses power, and the moving contact of the cover drop contactor (KM2) is opened. The lifting and dropping motor (7) stops working, and the lifting and dropping arm worm gear mechanism (15) ends the cover drop action. The one-key cover drop action ends. "Lift" inching control: The "lift" start signal is sent to the PLC (22) through the vehicle-mounted operation box (3), the touch screen HMI (23) or the ground unit (49). The PLC (22) executes the cover lifting action program and outputs a signal to the lifting and lowering drive circuit unit (29). The lifting cover contactor (KM1) coil in the lifting and lowering drive circuit unit (29) is energized and attracted, and the moving contact of the lifting cover contactor (KM1) is closed. The lifting and lowering motor (7) works in the forward direction, driving the lifting and lowering arm worm gear mechanism (15) in the cover adding device (1) to start the cover lifting action. When the vehicle-mounted operation box (3), the touch screen HMI (23) or the ground unit (49) sends the "lift" stop signal to the PLC (22), the output end of the PLC (22) controls the lifting cover contactor (KM1) coil in the lifting and lowering drive circuit unit (29) to lose power, and the moving contact of the lifting cover contactor (KM1) is opened. The lifting and lowering motor (7) 7) The forward rotation stops immediately; or when the lifting and lowering sensing head (16) at the rear of the capping device (1) touches the lifting-in-place proximity sensor (13), the position detection unit (24) at the input end of the PLC (22) receives the lifting-in-place signal, and the PLC (22) outputs a signal to the lifting and lowering drive circuit unit (29). The coil of the lifting cover contactor (KM1) in the lifting and lowering drive circuit unit (29) loses power, the moving contact of the lifting cover contactor (KM1) opens, the lifting and lowering motor (7) stops working, and the lifting and lowering arm worm gear mechanism (15) ends the lifting and lowering action; "Retract" jog control: A "retract" start signal is sent to the PLC (22) via the vehicle-mounted operation box (3), the touch screen HMI (23) or the ground unit (49). The PLC (22) starts to execute the telescopic motor (6) to open the brake action program. The PLC (22) outputs a signal to the telescopic motor brake contactor KMB (39) coil. The telescopic motor brake contactor KMB (39) coil is energized and attracted. The moving contact of the telescopic motor brake contactor KMB (39) is closed, driving the telescopic motor brake ( 40) is opened; at the same time, the PLC (22) executes the arm retracting action program and outputs a signal to the telescopic drive circuit unit (28). The coils of the first relay (KA1) and the third relay (KA3) in the telescopic drive circuit unit (28) are energized and attracted. The first relay (KA1) and the third relay (KA3) at the input end of the frequency converter (30) close their moving contacts. The frequency converter (30) outputs a low frequency. The telescopic motor (6) connected to the U, V, and W sides of the output end of the frequency converter (30) rotates forward at a low speed, driving the cover to be closed. The telescopic arm lead screw mechanism (14) in the device (1) continues to retract the arm. After the telescopic induction head (17) at the head of the cover device (1) touches the retracted arm proximity sensor (8), the retracted arm position signal in the position detection unit (24) is sent to the input end of the PLC (22). The coil of the telescopic motor brake contactor KMB (39) at the output end of the PLC (22) is energized and de-energized, the moving contact of the telescopic motor brake contactor KMB (39) is opened, and the telescopic motor brake (40) is locked. At the same time, the output end of the PLC (22) The coils of the first relay (KA1) and the third relay (KA3) in the telescopic drive circuit unit (28) lose power, the first relay (KA1) and the third relay (KA3) at the input end of the frequency converter (30) are disconnected, the frequency converter (30) stops working, and the forward rotation of the telescopic motor (6) stops; if the vehicle-mounted operating box (3), the touch screen HMI (23) or the ground unit (49) sends a "retract" stop signal to the PLC (22), the PLC (22) controls the capping device (1) to immediately stop the arm retracting action; "Extend" inching control: The "extend" start signal is sent to the PLC (22) through the vehicle operation box (3), the touch screen HMI (23) or the ground unit (49). The PLC (22) starts to execute the telescopic motor (6) to open the brake action program. The PLC (22) outputs a signal to the telescopic motor brake contactor KMB (39) coil. The telescopic motor brake contactor KMB (39) coil is energized and attracted. The moving contact of the telescopic motor brake contactor KMB (39) is closed, driving the telescopic motor brake ( 40) is opened; at the same time, the PLC (22) executes the arm extension action program and outputs a signal to the telescopic drive circuit unit (28). The coils of the second relay (KA2) and the third relay (KA3) in the telescopic drive circuit unit (28) are energized and attracted. The moving contacts of the second relay (KA2) and the third relay (KA3) at the input end of the frequency converter (30) are closed. The frequency converter (30) outputs a low frequency. The telescopic motor (6) connected to the U, V, and W sides of the output end of the frequency converter (30) reverses at a low speed, driving the cover adding device The telescopic arm lead screw mechanism (14) in the setting (1) continues the arm extension action. After the telescopic induction head (17) at the head of the cover device (1) touches the arm extension proximity sensor (10), the arm extension signal in the position detection unit (24) is sent to the input end of the PLC (22). The coil of the telescopic motor brake contactor KMB (39) at the output end of the PLC (22) is energized and de-energized, the moving contact of the telescopic motor brake contactor KMB (39) is opened, and the telescopic motor brake (40) is locked. At the same time, the output end of the PLC (22) The coils of the second relay (KA2) and the third relay (KA3) in the telescopic drive circuit unit (28) lose power, the moving contacts of the second relay (KA2) and the third relay (KA3) at the input end of the frequency converter (30) are disconnected, the frequency converter (30) stops working, and the telescopic motor (6) stops rotating in reverse; if the vehicle-mounted operating box (3), the touch screen HMI (23) or the ground unit (49) sends an "extend" stop signal to the PLC (22), the PLC (22) controls the capping device (1) to immediately stop the arm extension action; "Drop" inching control: The "drop" start signal is sent to the PLC (22) through the vehicle-mounted operation box (3), the touch screen HMI (23) or the ground unit (49). The PLC (22) executes the cover drop action program and outputs a signal to the lifting and dropping drive circuit unit (29). The coil of the cover drop contactor (KM2) in the lifting and dropping drive circuit unit (29) is energized and attracted. The moving contact of the cover drop contactor (KM2) is closed, and the lifting and dropping motor (7) works in reverse, driving the lifting and dropping arm worm gear mechanism (15) in the capping device (1) to start the cover drop action. The lifting and dropping sensor head (16) at the tail of the capping device (1) touches the falling position proximity sensor. After the sensor (12) is touched, the position detection unit (24) at the input end of the PLC (22) receives the landing position signal, and the PLC (22) outputs a signal to the lifting and lowering driving circuit unit (29). The coil of the cover-dropping contactor (KM2) in the lifting and lowering driving circuit unit (29) loses power, the moving contact of the cover-dropping contactor (KM2) opens, the drop motor (7) stops working, and the lifting and lowering arm worm gear mechanism (15) ends the cover-dropping action; if the vehicle-mounted operation box (3), the touch screen HMI (23) or the ground unit (49) sends a "dropping" stop signal to the PLC (22), the PLC (22) controls the cover-adding device (1) to immediately stop the cover-dropping action; "Emergency stop" control: an "emergency stop" start signal is input to the PLC (22) through the vehicle-mounted operation box (3), the touch screen HMI (23) or the ground unit (49), the PLC (22) executes the program, and the PLC (22) outputs a signal to de-energize the coil of the DC / AC module working relay (K1), the DC / AC module working relay (K1) moves open, and the system stops working.

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