CN114609894A

CN114609894A - Bus control-based control system and control method for movable hydrogen filling station

Info

Publication number: CN114609894A
Application number: CN202210506125.6A
Authority: CN
Inventors: 周雨轩; 范庆来; 李煦侃; 刘韬; 周慎学; 刘洪涛; 冯成; 潘尘; 许国栋; 邱悦悦
Original assignee: Zhejiang Zheneng Aerospace Hydrogen Energy Technology Co ltd
Current assignee: Zhejiang Zheneng Aerospace Hydrogen Energy Technology Co ltd
Priority date: 2022-05-11
Filing date: 2022-05-11
Publication date: 2022-06-10
Anticipated expiration: 2042-05-11
Also published as: CN114609894B

Abstract

The invention relates to the technical field of hydrogenation station control, in particular to a control system and a control method of a movable hydrogenation station based on bus control. A control system of a movable hydrogen filling station based on bus control comprises a monitoring module, a filling module, a pressurizing module, a gas discharging module, a nitrogen module, a cooling module and a safety alarm module; the monitoring module, the filling module, the pressurizing module, the gas discharging module, the nitrogen module, the cooling module and the safety alarm module respectively comprise a controller and a bus connector connected with the controller; the monitoring module, the filling module, the pressurizing module, the gas discharging module, the nitrogen module, the cooling module and the safety alarm module are electrically connected through a bus connector and a bus to form a closed-loop control circuit. The control system of the mobile hydrogen filling station can perform decentralized control, can process data on site on the basis of ensuring the validity of data transmission, and ensures the real-time performance and the sensitivity of control.

Description

Bus control-based control system and control method for movable hydrogen filling station

Technical Field

The invention relates to the technical field of hydrogenation station control, in particular to a control system and a control method of a movable hydrogenation station based on bus control.

Background

The mobile hydrogen station generally includes a fill module, a pressurization module, a vent module, a nitrogen module, a cooling module, and a safety alarm module, as shown in FIG. 1. The gas unloading module is used for unloading hydrogen from the tube bundle container, the pressurizing module is used for pressurizing the hydrogen, the filling module is used for filling the hydrogen for the automobile, the cooling module is used for cooling the hydrogen entering the pressurizing module, the nitrogen module is used for providing nitrogen for the filling module and the pressurizing module, and the safety alarm module is used for monitoring whether hydrogen leakage, fire and other conditions exist in the movable hydrogenation station or not and giving an alarm.

The filling module, the pressurizing module, the gas discharging module, the nitrogen module, the cooling module and the safety alarm module of the existing movable hydrogen filling station are mostly controlled by one controller, as shown in figure 2. Data transmission between modules all need to pass through the controller, (for example, data transmission between filling module and the pressure boost module, the filling module needs to transmit data to the controller earlier, the controller transmits data to the pressure boost module again, when the pressure boost module feeds back data, also need to transmit feedback data to the controller earlier, the controller transmits feedback data to the filling module again), make the data transmission efficiency between each module low like this, the real-time is poor, there is the data easily to lose simultaneously, the poor problem of security.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a control system and a control method of a movable hydrogen station based on bus control, which can realize on-site processing on data on the basis of ensuring the validity of data transmission, ensure the real-time performance and sensitivity of control, and simultaneously facilitate the maintenance of a control system so as to ensure the long-term stable operation of the control system.

The technical scheme adopted by the invention for solving the technical problems is as follows: a control system of a movable hydrogen filling station based on bus control comprises a monitoring module, a filling module, a pressurizing module, a gas discharging module, a nitrogen module, a cooling module and a safety alarm module;

the monitoring module, the filling module, the pressurizing module, the gas discharging module, the nitrogen module, the cooling module and the safety alarm module respectively comprise a controller and a bus connector connected with the controller;

the monitoring module, the filling module, the pressurizing module, the gas discharging module, the nitrogen module, the cooling module and the safety alarm module are electrically connected through a bus connector and a bus to form a closed-loop control circuit;

the controller of the monitoring module comprises

The signal generating unit is used for generating a first bus on-off checking signal and sending the first bus on-off checking signal along a first circulation direction of the closed-loop control circuit; generating a second bus on-off check signal at the same time, and sending the second bus on-off check signal along a second circulation direction of the closed-loop control circuit;

the timing unit is connected with the signal generating unit and is used for starting timing when the signal generating unit generates the first bus on-off detection signal and the second bus on-off detection signal;

the controller of the filling module, the pressurizing module, the gas discharging module, the nitrogen module, the cooling module and the safety alarm module is internally provided with a bus on-off judgment unit; the bus on-off judging unit is used for judging whether the first side bus of the corresponding module is normal or failed, judging whether the second side bus of the corresponding module is normal or failed, and performing corresponding feedback operation according to a judging result;

the controller of the monitoring module further comprises

The feedback signal receiving and judging unit is connected with the timing unit and used for judging whether the bus of the closed-loop control circuit is normal or has a fault through the feedback operation made by the bus on-off judging unit;

and the fault position determining unit is connected with the feedback signal receiving and judging unit and is used for determining a bus fault area of the closed-loop control circuit according to the bus judgment result of the feedback signal receiving and judging unit on the closed-loop control circuit.

Preferably, the bus on/off determination unit includes

The first signal receiving subunit is used for receiving the first bus on-off inspection signal;

the second signal receiving subunit is used for receiving the second bus on-off inspection signal;

the timing subunit is wirelessly connected with the signal generating unit and is used for starting timing when the signal generating unit generates the first bus on-off detection signal and the second bus on-off detection signal;

the signal receiving and judging subunit is connected with the first signal receiving subunit, the second signal receiving subunit and the timing subunit, and is used for judging that a first side bus of a corresponding module is normal or failed and judging that a second side bus of the corresponding module is normal or failed;

the signal forwarding subunit is connected with the signal receiving and judging subunit, and when the first side bus and the second side bus of the corresponding module are both normal, the signal forwarding subunit continuously sends the first bus on-off detection signal along the first circulation direction of the closed-loop control circuit, and simultaneously continuously sends the second bus on-off detection signal along the second circulation direction of the closed-loop control circuit;

the first signal feedback subunit is connected with the signal receiving and judging subunit, generates a first bus on-off feedback signal when a first side bus of a corresponding module is normal and a second side bus of the corresponding module has a fault, and sends the first bus on-off feedback signal along a second circulation direction of the closed-loop control circuit;

and the second signal feedback subunit is connected with the signal receiving and judging subunit, generates a second bus on-off feedback signal when the first side bus of the corresponding module has a fault and the second side bus is normal, and sends the second bus on-off feedback signal along the first circulation direction of the closed-loop control circuit.

Preferably, the signal receiving and determining subunit

When the first signal receiving subunit receives the first bus on-off detection signal within a preset time and the second signal receiving subunit receives the second bus on-off detection signal, judging that the first side bus and the second side bus of the corresponding module are normal;

when the first signal receiving subunit receives the first bus on-off detection signal within a preset time, but the second signal receiving subunit does not receive the second bus on-off detection signal, judging that the first side bus of the corresponding module is normal and the second side bus of the corresponding module has a fault;

when the first signal receiving subunit does not receive the first bus on-off detection signal within a preset time, but the second signal receiving subunit receives the second bus on-off detection signal, the first side bus of the corresponding module is judged to be in fault, and the second side bus of the corresponding module is judged to be normal;

and when the first signal receiving subunit does not receive the first bus on-off inspection signal within a preset time and the second signal receiving subunit does not receive the second bus on-off inspection signal, judging that both the first side bus and the second side bus of the corresponding module have faults.

Preferably, the feedback signal reception determination unit

When the returned first bus on-off inspection signal and the second bus on-off inspection signal are received within preset time, judging that the bus of the whole closed-loop control circuit is normal;

and when the first bus on-off feedback signal and/or the second bus on-off feedback signal are/is received within the preset time or any signal is not received within the preset time, judging that the closed-loop control circuit has a storage fault.

Preferably, the fault location determination unit

When the feedback signal receiving and judging unit receives both a first bus on-off feedback signal and a second bus on-off feedback signal, determining that an area between a corresponding module generating the first bus on-off feedback signal and a corresponding module generating the second bus on-off feedback signal is a bus fault area;

when the feedback signal receiving and judging unit only receives a first bus on-off feedback signal, determining an area between a corresponding module generating the first bus on-off feedback signal and the monitoring module as a bus fault area;

when the feedback signal receiving and judging unit only receives a second bus on-off feedback signal, determining an area between a corresponding module generating the second bus on-off feedback signal and the monitoring module as a bus fault area;

and when the feedback signal receiving and judging unit does not receive any signal, determining all the areas as the bus fault areas.

A control method of a movable hydrogen filling station based on bus control comprises the following steps

L1, electrically connecting the monitoring module, the filling module, the pressurizing module, the gas discharging module, the nitrogen module, the cooling module and the safety alarm module through a bus connector and a bus to form a closed-loop control circuit;

l2, a signal generating unit generates a first bus on-off check signal and sends the first bus on-off check signal along a first circulation direction of the closed-loop control circuit; generating a second bus on-off check signal at the same time, and sending the second bus on-off check signal along a second circulation direction of the closed-loop control circuit;

the timing unit starts timing when the signal generating unit generates the first bus on-off detection signal and the second bus on-off detection signal;

l3, a filling module, a pressurizing module, a gas discharging module, a nitrogen module, a cooling module and a safety alarm module all judge that a first side bus of the corresponding module is normal or fault and a second side bus of the corresponding module is normal or fault through a bus on-off judging unit, and make corresponding feedback operation according to the judging result;

l4, the feedback signal receiving judging unit judges whether the bus of the closed-loop control circuit is normal or has a fault through the feedback operation made by the bus on-off judging unit;

l5, the fault location determination unit determines the bus fault region of the closed loop control circuit by the feedback signal reception determination unit upon a bus determination result of the closed loop control circuit.

Preferably, L3 specifically includes

L31 receives the first bus on-off check signal through a first signal receiving subunit; meanwhile, a second signal receiving subunit receives the second bus on-off inspection signal;

the L32 judges that the first side bus and the second side bus of the corresponding module are normal through the signal receiving judgment subunit when the first signal receiving subunit receives the first bus on-off detection signal and the second signal receiving subunit receives the second bus on-off detection signal within a preset time;

when the first signal receiving subunit does not receive the first bus on-off detection signal within a preset time and the second signal receiving subunit does not receive the second bus on-off detection signal, determining that both the first side bus and the second side bus of the corresponding module have faults;

through the signal forwarding subunit, when the first side bus and the second side bus of the corresponding module are both normal, the L33 continuously sends the first bus on-off check signal along the first circulation direction of the closed-loop control circuit, and simultaneously continuously sends the second bus on-off check signal along the second circulation direction of the closed-loop control circuit;

the L34 generates a first bus on-off feedback signal through a first signal feedback subunit when a first side bus of a corresponding module is normal and a second side bus of the corresponding module is in fault, and sends the first bus on-off feedback signal along a second circulation direction of the closed-loop control circuit;

and the L35 generates a second bus on-off feedback signal through a second signal feedback subunit when the first side bus of the corresponding module has a fault and the second side bus is normal, and sends the second bus on-off feedback signal along the first circulation direction of the closed-loop control circuit.

Preferably, said L3 further comprises,

the L36 sends out alarm signal when the first side bus or the second side bus of the corresponding module fails through the alarm subunit.

Preferably, the L4 specifically is that, when the returned first bus on-off check signal and the second bus on-off check signal are received within a preset time, a feedback signal receiving and determining unit is used to determine that the bus of the whole closed-loop control circuit is normal;

Preferably, the L5 specifically is that, by the fault location determining unit, when the feedback signal receiving and determining unit receives both the first bus on-off feedback signal and the second bus on-off feedback signal, it determines that an area between a corresponding module that generates the first bus on-off feedback signal and a corresponding module that generates the second bus on-off feedback signal is a bus fault area;

Advantageous effects

The controller and the bus connector are arranged on each module, and the modules are connected through the bus connectors and the buses to form a closed-loop control circuit, so that the control system of the mobile hydrogen filling station can perform decentralized control, the control effect can be fundamentally improved, the conversion links can be reduced, the data can be processed on site on the basis of ensuring the validity of data transmission, the real-time performance and the sensitivity of control are ensured, and the data transmission speed is much higher than that of the control system in the prior art; meanwhile, the monitoring module is provided with the signal generating unit, the timing unit, the feedback signal receiving and judging unit and the fault position determining unit, and the bus on-off judging units are arranged in the modules, so that whether the bus of the control system has a fault or not and which position the bus has the fault specifically can be quickly determined through the signal generating unit, the timing unit, the feedback signal receiving and judging unit, the fault position determining unit and the bus on-off judging unit, and further, a worker can conveniently maintain the control system to ensure the stable operation of the control system.

Drawings

FIG. 1 is a schematic diagram of a prior art modular connection of a mobile hydrogen station;

FIG. 2 is a schematic diagram of the connection between modules of a mobile hydrogen station and a controller in the prior art;

FIG. 3 is a schematic diagram of the connection of the modules of the mobile hydrogen station to the controller according to the present invention;

FIG. 4 is a schematic diagram of a bus on-off determination unit in a module according to the present invention;

FIG. 5 is a schematic diagram of a monitoring module according to the present invention.

Detailed Description

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.

Example 1: the utility model provides a control system of portable hydrogenation station based on bus control, includes the monitoring module, fills the module, and pressure boost module unloads the gas module, nitrogen gas module, cooling module and safety alarm module. The monitoring module, the filling module, the pressurizing module, the gas discharging module, the nitrogen module, the cooling module and the safety alarm module all comprise a controller and a bus connector connected with the controller. The monitoring module, the filling module, the pressurizing module, the gas discharging module, the nitrogen module, the cooling module and the safety alarm module are electrically connected through the bus connector and the bus to form a closed-loop control circuit.

Specifically, as shown in fig. 3, the monitoring module is provided with a first controller and a first bus connector, the first bus connector is connected to the first controller, the first controller can be used to directly control the monitoring module, and the first bus connector is used to perform bus connection.

The filling module is provided with a second controller and a second bus connector, the second bus connector is connected with the second controller, and the second controller can be used for directly controlling the filling module (for example, components such as a pressure transmitter, a temperature transmitter, a hydrogen concentration detector, a flame detector, an electromagnetic valve, a pressure regulating valve and a mass flow meter in the filling module can be directly controlled). The second bus connector is used for bus connection, and specifically, a second port of the second bus connector can be connected with a first port of the first bus connector through a bus.

The pressurizing module is provided with a third controller and a third bus connector, the third bus connector is connected with the third controller, and the third controller can be used for directly controlling the pressurizing module (for example, components such as a pressure transmitter, a temperature transmitter, a hydrogen concentration detector, a flame detector, an electromagnetic valve, a hydraulic oil pump and a heater in the pressurizing module can be directly controlled). The third bus connector is used for bus connection, and specifically, a first port of the third bus connector can be connected with a first port of the second bus connector through a bus.

The gas discharging module is provided with a fourth controller and a fourth bus connector, the fourth bus connector is connected with the fourth controller, and the fourth controller can be used for directly controlling the gas discharging module (for example, components such as a pressure transmitter, a temperature transmitter, a hydrogen concentration detector, a flame detector, an electromagnetic valve and a mass flow meter in the gas discharging module can be directly controlled). The fourth bus connector is used for bus connection, and specifically, a first port of the fourth bus connector and a second port of the third bus connector can be connected through a bus.

The nitrogen module is provided with a fifth controller and a fifth bus connector, the fifth bus connector is connected with the fifth controller, and the fifth controller can be used for directly controlling the nitrogen module (for example, components such as a pressure transmitter and an electromagnetic valve in the nitrogen module can be directly controlled). The fifth bus connector is configured to perform bus connection, and specifically, a first port of the fifth bus connector may be connected to a second port of the fourth bus connector through a bus.

The cooling module is provided with a sixth controller and a sixth bus connector, the sixth bus connector is connected with the sixth controller, and the sixth controller can be used for directly controlling the cooling module (for example, components such as a pressure transmitter, a temperature transmitter, a water chilling unit and a flow sensor in the cooling module can be directly controlled). The sixth bus connector is configured to perform bus connection, and specifically, a first port of the sixth bus connector may be connected to a second port of the fifth bus connector through a bus.

The safety alarm module is provided with a seventh controller and a seventh bus connector, the seventh bus connector is connected with the seventh controller, and the seventh controller can be used for directly controlling the safety alarm module (for example, components such as an alarm host and the like in the safety alarm module can be directly controlled). The seventh bus connector is configured to perform bus connection, specifically, a port two of the seventh bus connector may be connected to a port two of the sixth bus connector through a bus, and a port one of the seventh bus connector may be connected to a port two of the first bus connector through a bus.

The controller and the bus connector are arranged on each module, and the modules are connected through the bus connector and the bus to form a closed-loop control circuit. The control system of this embodiment portable hydrogenation station based on bus control can carry out decentralized control, both can fundamentally promote the control effect, is favorable to reducing the conversion link again, on the basis of guaranteeing data transmission validity, can realize the on-the-spot processing to data, has ensured real-time, the sensitivity of control, and data transmission speed compares prior art's control system and will be fast a lot.

However, in the control system of the mobile hydrogen station based on bus control, because each module is on a closed-loop control circuit, once a certain section of bus fails (for example, the connection with the corresponding module is released), the normal operation of the whole control system is greatly affected, and it is difficult to quickly find out which section of bus has a fault. Therefore, the embodiment also arranges a signal generating unit, a timing unit, a feedback signal receiving and judging unit and a fault position determining unit in the monitoring module, and arranges a bus on-off judging unit in each module, and the signal generating unit, the timing unit, the feedback signal receiving and judging unit, the fault position determining unit and the bus on-off judging unit can quickly determine whether the bus of the control system has a fault and at which position the bus has the fault, so that a worker can maintain the control system conveniently to ensure the stable operation of the control system.

Specifically, as shown in fig. 5, the controller of the monitoring module includes a signal generating unit, a timing unit, a feedback signal receiving and determining unit, and a fault location determining unit.

And the signal generating unit is used for generating a first bus on-off checking signal (which can be a clock signal) and sending the first bus on-off checking signal along a first circulation direction of the closed-loop control circuit (which can be sent along a counterclockwise direction shown in fig. 3, namely, the signal is sent by the monitoring module, the filling module, the pressurization module, the gas discharging module, the nitrogen module, the cooling module, the safety alarm module and the monitoring module in sequence). And simultaneously generating a second bus on-off check signal (which may be another different clock signal), and sending the second bus on-off check signal along a second circulation direction of the closed-loop control circuit (which may be a clockwise direction as shown in fig. 3, that is, the signal is sent by the monitoring module, the safety alarm module, the cooling module, the nitrogen module, the gas discharging module, the pressurization module, the filling module and the monitoring module in sequence).

And the timing unit is connected with the signal generating unit and is used for starting timing when the signal generating unit generates the first bus on-off detection signal and the second bus on-off detection signal. Under the condition that the bus is normal, a first bus on-off inspection signal (the second bus on-off inspection signal is the same as the first bus on-off inspection signal) is sent by the monitoring module and sequentially passes through the filling module, the pressurization module, the gas discharging module, the nitrogen module, the cooling module and the safety alarm module, and the time for returning to the monitoring module is very short and only needs a few seconds.

And the controller of the filling module, the pressurization module, the gas discharging module, the nitrogen module, the cooling module and the safety alarm module is internally provided with a bus on-off judgment unit. As shown in fig. 4, the bus on-off determining unit includes a first signal receiving subunit, a second signal receiving subunit, a timing subunit, a signal receiving determining subunit, a signal forwarding subunit, a first signal feedback subunit, a second signal feedback subunit, and an alarm subunit.

The first signal receiving subunit is used for receiving the first bus on-off detection signal, and the second signal receiving subunit is used for receiving the second bus on-off detection signal.

The timing subunit is wirelessly connected with the signal generating unit and is used for starting timing when the signal generating unit generates the first bus on-off detection signal and the second bus on-off detection signal. If the buses on two sides of a certain module are normal, a signal generating unit generates and sends a first bus on-off check signal and a second bus on-off check signal, the module receives the first bus on-off check signal and the second bus on-off check signal within a certain time, and if the first bus on-off check signal and/or the second bus on-off check signal are not received for a long time (set to be 6 seconds through a controller), the bus on one side or two sides of the module is in fault.

The signal receiving and judging subunit is connected with the first signal receiving subunit, the second signal receiving subunit and the timing subunit, and is configured to judge that the first side bus of the corresponding module is normal or faulty, and to judge that the second side bus of the corresponding module is normal or faulty. Specifically, when the first signal receiving subunit receives the on-off detection signal of the first bus within a preset time (6 seconds), and the second signal receiving subunit receives the on-off detection signal of the second bus, it is determined that the first side bus and the second side bus of the corresponding module are normal. And when the first signal receiving subunit receives the first bus on-off detection signal within a preset time (6 seconds) but the second signal receiving subunit does not receive the second bus on-off detection signal, judging that the first side bus and the second side bus of the corresponding module are normal and have a fault. And when the first signal receiving subunit does not receive the first bus on-off detection signal within a preset time (6 seconds), but the second signal receiving subunit receives the second bus on-off detection signal, judging that the first side bus of the corresponding module is in fault and the second side bus is normal. And when the first signal receiving subunit does not receive the first bus on-off detection signal within preset time (6 seconds) and the second signal receiving subunit does not receive the second bus on-off detection signal, judging that both the first side bus and the second side bus of the corresponding module have faults.

The signal forwarding subunit is connected to the signal receiving and determining subunit, and when the first side bus and the second side bus of the corresponding module are both normal, the signal forwarding subunit continuously sends the first bus on-off check signal in a first circulation direction (counterclockwise direction as shown in fig. 3) of the closed-loop control circuit, and simultaneously sends the second bus on-off check signal in a second circulation direction (clockwise direction as shown in fig. 3) of the closed-loop control circuit.

The first signal feedback subunit is connected with the signal receiving and judging subunit, generates a first bus on-off feedback signal when the first side bus of the corresponding module is normal and the second side bus of the corresponding module is in fault, and sends the first bus on-off feedback signal along the second circulation direction of the closed-loop control circuit. In this embodiment, numbers may be set for each module, for example, if the number of the charging module is No. 01, the number of the boosting module is No. 02, the number of the discharging module is No. 03, the number of the nitrogen module is No. 04, the number of the cooling module is No. 05, and the number of the security alarm module is No. 06, then the first bus on-off feedback signal may be the number of the module code plus the first bus on-off check signal. And due to the failure of the second side bus of the module, the first bus on-off feedback signal needs to be returned from the original path (i.e. when coming, it is sent along the first circulation direction of the closed-loop control circuit, and when going, it needs to be sent along the second circulation direction of the closed-loop control circuit).

And the second signal feedback subunit is connected with the signal receiving and judging subunit, generates a second bus on-off feedback signal when the first side bus of the corresponding module has a fault and the second side bus is normal, and sends the second bus on-off feedback signal along the first circulation direction of the closed-loop control circuit. In this embodiment, numbers may be set for each module, for example, if the charging module is number 01, the boosting module is number 02, the discharging module is number 03, the nitrogen module is number 04, the cooling module is number 05, and the security alarm module is number 06, then the second bus on-off feedback signal may be the module code number plus the second bus on-off check signal. And due to the failure of the first side bus of the module, the second bus on-off feedback signal needs to be returned from the original path (i.e. when coming, the second bus on-off feedback signal is sent along the second circulation direction of the closed-loop control circuit, and when returning, the second bus on-off feedback signal needs to be sent along the first circulation direction of the closed-loop control circuit).

The alarm subunit is connected with the signal receiving and judging subunit, and when the first side bus or the second side bus of the corresponding module fails, the alarm subunit gives out sound and light alarm. In this embodiment, the monitoring module, the filling module, the pressure boost module, unload the gas module, the nitrogen gas module, cooling module and safety alarm module are all mutually independent modules, when assembling the hydrogen station, only need to monitor the module, the filling module, the pressure boost module, unload the gas module, the nitrogen gas module, cooling module and safety alarm module carry to the automobile body on, and with the monitoring module, the filling module, the pressure boost module, unload the gas module, the nitrogen gas module, the cooling module, the casing of safety alarm module is connected fixedly with the corresponding position of automobile body, connect each module through the pipeline after that, connect each module through the bus at last can. Although the modules are arranged in a closed loop on the control circuit, the specific arrangement position on the vehicle body is not in a loop, and therefore, the position of each module is not well determined. Therefore, the alarm subunits are arranged on the modules, and when a first side bus or a second side bus of a certain module has a fault, an audible and visual alarm signal can be sent out, so that a worker can find the fault position of the bus quickly. For example, when the bus between the gas discharging module and the nitrogen module is in fault (the buses at other positions are normal), the bus at the second side of the gas discharging module is in fault, and sound and light alarm is given out; and the first side bus of the nitrogen module has a fault and sends out an audible and visual alarm, so that the bus between the gas unloading module and the nitrogen module is obviously maintained, and the maintenance convenience of the control system is further improved.

As shown in fig. 5, a feedback signal receiving determination unit is connected to the timing unit, and is configured to determine whether a bus of the closed-loop control circuit is normal or has a fault. Specifically, when the returned first bus on-off check signal and the second bus on-off check signal are received within a preset time (10 seconds), the bus of the whole closed-loop control circuit is judged to be normal. And when the first bus on-off feedback signal and/or the second bus on-off feedback signal are/is received within the preset time (10 seconds), or any signal is not received within the preset time (10 seconds), judging that the closed-loop control circuit has a storage fault. For example, when a bus between the pressurization module and the air discharge module has a fault, the pressurization module generates a first bus on-off feedback signal and returns the first bus on-off feedback signal to the feedback signal receiving and judging unit of the monitoring module; the air discharge module can generate a second bus on-off feedback signal and send the second bus on-off feedback signal back to the feedback signal receiving and judging unit of the monitoring module. For another example, when the bus between the monitoring module and the filling module fails, the filling module generates a second bus on-off feedback signal and sends the second bus on-off feedback signal back to the feedback signal receiving and determining unit of the monitoring module. For another example, when the bus between the monitoring module and the filling module and between the monitoring module and the safety alarm module fails, the feedback signal receiving and determining unit does not receive any signal.

And the fault position determining unit is connected with the feedback signal receiving and judging unit and is used for determining a bus fault area of the closed-loop control circuit. Specifically, when the feedback signal receiving and determining unit receives both a first bus on-off feedback signal and a second bus on-off feedback signal, it is determined that an area between a corresponding module generating the first bus on-off feedback signal and a corresponding module generating the second bus on-off feedback signal is a bus fault area.

For example, if the feedback signal reception determination unit receives a first bus on-off feedback signal generated by the boost module and a second bus on-off feedback signal generated by the cooling module, the region between the boost module and the cooling module is a bus fault region. Assuming that the buses are normally connected in the initial assembly stage of the mobile hydrogen filling station, after long-term use, the connection of some buses can be loosened, so that the buses are in failure, but once a certain bus is loosened, the bus can be maintained immediately to be normal, so that generally only one or two buses of the whole control can be in failure at the same time. Therefore, when a first bus on-off feedback signal generated by the pressurization module and a second bus on-off feedback signal generated by the cooling module are received, only the bus between the pressurization module and the gas discharge module and the bus between the nitrogen module and the cooling module need to be focused on maintenance.

For another example, if the feedback signal receiving and determining unit receives a first bus on-off feedback signal generated by the nitrogen module and a second bus on-off feedback signal generated by the cooling module, the region between the nitrogen module and the cooling module is a bus fault region. It is clear that the bus between the nitrogen module and the cooling module has failed.

And when the feedback signal receiving and judging unit only receives a first bus on-off feedback signal, determining the area between the corresponding module generating the first bus on-off feedback signal and the monitoring module as a bus fault area. For example, the feedback signal receiving and determining unit only receives a first bus on-off feedback signal generated by the air unloading module, the area between the air unloading module and the monitoring module is a bus fault area, and the maintenance is mainly performed on the bus between the monitoring module and the safety alarm module.

And when the feedback signal receiving and judging unit only receives a second bus on-off feedback signal, determining the area between the corresponding module generating the second bus on-off feedback signal and the monitoring module as a bus fault area. For example, the feedback signal receiving and determining unit only receives the second bus on-off feedback signal generated by the cooling module, the area between the cooling module and the monitoring module is a bus fault area, and the maintenance is mainly performed on the bus between the monitoring module and the filling module.

And when the feedback signal receiving and judging unit does not receive any signal, determining all the areas as the bus fault areas. When the feedback signal receiving and judging unit does not receive the first bus on-off detection signal and the second bus on-off detection signal, and does not receive the first bus on-off feedback signal or the second bus on-off feedback signal, it indicates that all the areas are bus fault areas, and the bus between the monitoring module and the filling module and the bus between the monitoring module and the safety alarm module have faults.

In addition, the control system of this real-time example can also include the mobile terminal with monitoring module's controller wireless connection, mobile terminal has the display screen, the display screen can show the monitoring module similar with fig. 3, the module of annotating, the pressure boost module, the module of unloading, the nitrogen gas module, the closed loop connection picture of cooling module and safety warning module, can mark red the demonstration on the closed loop connection picture after the trouble position determination unit determines the bus fault area to make things convenient for the staff to know the trouble condition of bus fast.

Example 2: a control method of a movable hydrogen filling station based on bus control comprises the following steps

L1, the monitoring module, the filling module, the pressurizing module, the gas discharging module, the nitrogen module, the cooling module and the safety alarm module are electrically connected through a bus connector and a bus to form a closed-loop control circuit. Specifically, as shown in fig. 3, a first port of the first bus connection of the monitoring module is connected to a second port of the second bus connector of the charging module, a second port of the first bus connection of the monitoring module is connected to a first port of the seventh bus connector of the safety alarm module, a first port of the second bus connector of the charging module is connected to a first port of the third bus connector of the boosting module, a second port of the third bus connector of the boosting module is connected to a first port of the fourth bus connector of the gas discharging module, a second port of the fourth bus connector of the gas discharging module is connected to a first port of the fifth bus connector of the nitrogen module, a second port of the fifth bus connector of the nitrogen module is connected to a first port of the sixth bus connector of the cooling module, and a second port of the sixth bus connector of the cooling module is connected to a second port of the seventh bus connector of the safety alarm module.

L2, the signal generating unit generates a first bus on-off check signal (which may be a clock signal) and sends the first bus on-off check signal in a first cycle direction of the closed-loop control circuit (which may be in a counterclockwise direction as shown in fig. 3, i.e., the signal is sent by the monitoring module-the filling module-the pressurizing module-the gas discharging module-the nitrogen module-the cooling module-the safety alarm module-the monitoring module in sequence). And simultaneously generating a second bus on-off check signal (which may be another different clock signal), and sending the second bus on-off check signal along a second circulation direction of the closed-loop control circuit (which may be a clockwise direction as shown in fig. 3, that is, the signal is sent by the monitoring module, the safety alarm module, the cooling module, the nitrogen module, the gas discharging module, the pressurization module, the filling module and the monitoring module in sequence).

And timing is started when the signal generating unit generates the first bus on-off checking signal and the second bus on-off checking signal through a timing unit. Under the condition that the bus is normal, a first bus on-off inspection signal (the second bus on-off inspection signal is the same as the first bus on-off inspection signal) is sent by the monitoring module and sequentially passes through the filling module, the pressurization module, the gas discharging module, the nitrogen module, the cooling module and the safety alarm module, and the time for returning to the monitoring module is very short and only needs a few seconds.

L3, a filling module, a pressurizing module, a gas discharging module, a nitrogen module, a cooling module and a safety alarm module all judge that a first side bus of the corresponding module is normal or fault and judge that a second side bus of the corresponding module is normal or fault through a bus on-off judging unit; and corresponding feedback operation is carried out according to the judgment result. As shown in fig. 4, the bus on-off determination unit includes a first signal receiving subunit, a second signal receiving subunit, a timing subunit, a signal receiving determination subunit, a signal forwarding subunit, a first signal feedback subunit, a second signal feedback subunit, and an alarm subunit. The timing subunit is wirelessly connected with the signal generating unit and is used for starting timing when the signal generating unit generates the first bus on-off detection signal and the second bus on-off detection signal. If the buses on two sides of a certain module are normal, a signal generating unit generates and sends a first bus on-off check signal and a second bus on-off check signal, the module receives the first bus on-off check signal and the second bus on-off check signal within a certain time, and if the first bus on-off check signal and/or the second bus on-off check signal are not received for a long time (set to be 6 seconds through a controller), the bus on one side or two sides of the module is in fault.

Wherein L3 specifically comprises

L31 receives the first bus on-off check signal through a first signal receiving subunit; and meanwhile, receiving the second bus on-off inspection signal through a second signal receiving subunit.

And L32 judges that the first side bus and the second side bus of the corresponding module are normal through the signal receiving judgment subunit when the first signal receiving subunit receives the first bus on-off detection signal and the second signal receiving subunit receives the second bus on-off detection signal within the preset time (6 seconds). And when the first signal receiving subunit receives the first bus on-off detection signal within a preset time (6 seconds) but the second signal receiving subunit does not receive the second bus on-off detection signal, judging that the first side bus and the second side bus of the corresponding module are normal and have a fault. And when the first signal receiving subunit does not receive the first bus on-off detection signal within a preset time (6 seconds), but the second signal receiving subunit receives the second bus on-off detection signal, judging that the first side bus of the corresponding module is in fault and the second side bus is normal. And when the first signal receiving subunit does not receive the first bus on-off detection signal within the preset time (6 seconds) and the second signal receiving subunit does not receive the second bus on-off detection signal, judging that both the first side bus and the second side bus of the corresponding module have faults.

Through the signal forwarding subunit, when the first-side bus and the second-side bus of the corresponding module are both normal, the L33 continuously sends the first bus on-off check signal in the first cycle direction (counterclockwise direction as shown in fig. 3) of the closed-loop control circuit, and simultaneously continuously sends the second bus on-off check signal in the second cycle direction (clockwise direction as shown in fig. 3) of the closed-loop control circuit.

And the L34 generates a first bus on-off feedback signal through the first signal feedback subunit when the first side bus of the corresponding module is normal and the second side bus of the corresponding module is in fault, and sends the first bus on-off feedback signal along the second circulation direction of the closed-loop control circuit. In this embodiment, numbers may be set for each module, for example, if the number of the charging module is No. 01, the number of the boosting module is No. 02, the number of the discharging module is No. 03, the number of the nitrogen module is No. 04, the number of the cooling module is No. 05, and the number of the security alarm module is No. 06, then the first bus on-off feedback signal may be the number of the module code plus the first bus on-off check signal. And due to the failure of the second side bus of the module, the first bus on-off feedback signal needs to be returned from the original path (i.e. when coming, it is sent along the first circulation direction of the closed-loop control circuit, and when going, it needs to be sent along the second circulation direction of the closed-loop control circuit).

And the L35 generates a second bus on-off feedback signal through a second signal feedback subunit when the first side bus of the corresponding module has a fault and the second side bus is normal, and sends the second bus on-off feedback signal along the first circulation direction of the closed-loop control circuit. In this embodiment, numbers may be set for each module, for example, if the charging module is number 01, the boosting module is number 02, the discharging module is number 03, the nitrogen module is number 04, the cooling module is number 05, and the security alarm module is number 06, then the second bus on-off feedback signal may be the module code number plus the second bus on-off check signal. And due to the failure of the first side bus of the module, the second bus on-off feedback signal needs to be returned from the original path (i.e. when coming, the second bus on-off feedback signal is sent along the second circulation direction of the closed-loop control circuit, and when returning, the second bus on-off feedback signal needs to be sent along the first circulation direction of the closed-loop control circuit).

The L36 sends out alarm signal when the first side bus or the second side bus of the corresponding module fails through the alarm subunit. The alarm subunit is connected with the signal receiving and judging subunit, and when the first side bus or the second side bus of the corresponding module fails, the alarm subunit gives out sound and light alarm. In this embodiment, the monitoring module, the module of annotating, the pressure boost module, unload the gas module, the nitrogen gas module, cooling module and safety alarm module all are mutually independent module, when the transportation, only need with the monitoring module, the module of annotating, the pressure boost module, unload the gas module, the nitrogen gas module, cooling module and safety alarm module carry the automobile body on, and with the monitoring module, the module of annotating, the pressure boost module, unload the gas module, the nitrogen gas module, the cooling module, the casing of safety alarm module is connected fixedly with the corresponding position of automobile body and can be transported. After the installation site of the hydrogenation station is reached, the modules are only required to be hoisted to the designated positions, then the modules are connected through the pipelines, and finally the modules are connected through the buses. Only one bus is needed among the modules, the problems of more cables and large installation amount of the hydrogenation station are solved, and the potential safety hazard caused by more ground cables of the mobile hydrogenation station is also avoided. Although the modules are arranged in a closed loop on the control circuit, the specific arrangement position on the vehicle body is not in a loop, and therefore, the position of each module is not well determined. Therefore, the alarm subunits are arranged on the modules, and when the first side bus or the second side bus of a certain module has a fault, an audible and visual alarm signal can be sent out, so that a worker can quickly find the fault position of the bus. For example, when the bus between the gas discharging module and the nitrogen module is in fault (the buses at other positions are normal), the bus at the second side of the gas discharging module is in fault, and sound and light alarm is given out; and the first side bus of the nitrogen module has a fault and sends out an audible and visual alarm, so that the bus between the gas unloading module and the nitrogen module is obviously maintained, and the maintenance convenience of the control system is further improved.

L4, the feedback signal reception determination unit determines whether the bus of the closed-loop control circuit is normal or faulty by the feedback operation made by the bus on-off determination unit. L4 is specifically configured to determine that the bus of the entire closed-loop control circuit is normal when the returned first bus on-off check signal and the second bus on-off check signal are received within a preset time (10 seconds) by the feedback signal receiving determination unit. And when the first bus on-off feedback signal and/or the second bus on-off feedback signal are/is received within the preset time or any signal is not received within the preset time (10 seconds), judging that the closed-loop control circuit has a storage fault.

For example, when a bus between the pressurization module and the air discharge module has a fault, the pressurization module generates a first bus on-off feedback signal and returns the first bus on-off feedback signal to the feedback signal receiving and judging unit of the monitoring module; the air discharge module can generate a second bus on-off feedback signal and send the second bus on-off feedback signal back to the feedback signal receiving and judging unit of the monitoring module. For another example, when the bus between the monitoring module and the filling module fails, the filling module generates a second bus on-off feedback signal and sends the second bus on-off feedback signal back to the feedback signal receiving and determining unit of the monitoring module. For another example, when the bus between the monitoring module and the filling module and between the monitoring module and the safety alarm module fails, the feedback signal receiving and determining unit does not receive any signal.

L5, the fault location determination unit determines the bus fault region of the closed loop control circuit by the feedback signal reception determination unit upon a bus determination result of the closed loop control circuit. L5 is specifically that, by the fault location determination unit, when the feedback signal reception determination unit receives both the first bus on-off feedback signal and the second bus on-off feedback signal, it determines that the area between the corresponding module that generates the first bus on-off feedback signal and the corresponding module that generates the second bus on-off feedback signal is a bus fault area.

And when the feedback signal receiving and judging unit only receives a first bus on-off feedback signal, determining an area between a corresponding module generating the first bus on-off feedback signal and the monitoring module as a bus fault area. For example, the feedback signal receiving and determining unit only receives a first bus on-off feedback signal generated by the air unloading module, the area between the air unloading module and the monitoring module is a bus fault area, and the maintenance is mainly performed on the bus between the monitoring module and the safety alarm module.

The above-described embodiments are merely illustrative of the preferred embodiments of the present invention and do not limit the spirit and scope of the present invention. Various modifications and improvements of the technical solutions of the present invention may be made by those skilled in the art without departing from the design concept of the present invention, and the technical contents of the present invention are all described in the claims.

Claims

1. A control system of a movable hydrogen filling station based on bus control is characterized in that: the device comprises a monitoring module, a filling module, a pressurizing module, a gas discharging module, a nitrogen module, a cooling module and a safety alarm module;

the controller of the monitoring module comprises

the controller of the monitoring module further comprises

2. The control system of the movable hydrogen refueling station based on bus control as claimed in claim 1, wherein: the bus on-off determination unit includes

3. The control system of the movable hydrogen refueling station based on bus control as claimed in claim 2, wherein: the signal receiving and judging subunit

and when the first signal receiving subunit does not receive the first bus on-off detection signal within preset time and the second signal receiving subunit does not receive the second bus on-off detection signal, judging that both the first side bus and the second side bus of the corresponding module have faults.

4. The control system of the movable hydrogen refueling station based on bus control as claimed in claim 2, wherein: the feedback signal reception determination unit

5. The control system of the movable hydrogen refueling station based on bus control as claimed in claim 4, wherein: the fault location determination unit

When the feedback signal receiving and judging unit receives both a first bus on-off feedback signal and a second bus on-off feedback signal, determining that a region between a corresponding module generating the first bus on-off feedback signal and a corresponding module generating the second bus on-off feedback signal is a bus fault region;

6. A control method of a movable hydrogen filling station based on bus control is characterized in that: comprises the following steps

7. The bus control-based control method for the mobile hydrogen station according to claim 6, wherein: said L3 specifically comprises

l34 generates a first bus on-off feedback signal through a first signal feedback subunit when a first side bus of a corresponding module is normal and a second side bus of the corresponding module is in fault, and sends the first bus on-off feedback signal along a second circulation direction of the closed-loop control circuit;

8. The bus control-based control method for the mobile hydrogen station according to claim 7, wherein: the L3 may also include that,

9. The bus control-based control method for the mobile hydrogen station according to claim 6, wherein: the L4 is specifically configured to determine, by a feedback signal receiving determination unit, that a bus of the entire closed-loop control circuit is normal when receiving the returned first bus on-off check signal and the second bus on-off check signal within a preset time;

10. The bus-control-based control method for the mobile hydrogen station according to claim 9, wherein: the L5 is specifically that, by the fault location determining unit, when the feedback signal receiving and determining unit receives both the first bus on-off feedback signal and the second bus on-off feedback signal, it determines that an area between a corresponding module that generates the first bus on-off feedback signal and a corresponding module that generates the second bus on-off feedback signal is a bus fault area;