Access control system for equipment area of hydrogen refueling station

Abstract

The utility model discloses a hydrogen refueling station equipment area access control system. The technical problems that a door body is tedious to operate and the explosion-proof safety risk is high when a user goes in and out of a hydrogen refueling station equipment area are solved. The device comprises a gate arranged at an entrance / exit of an equipment area, a driving motor which is in transmission connection with the gate and is used for controlling the gate to open and close, an electrostatic discharge alarm instrument which is arranged at one side of the gate and is used for people coming and electrostatic detection / release, and a control unit which is in communication connection with the electrostatic discharge alarm instrument, the motor driving module is electrically connected between the control unit and the driving motor; and the IC card reader is in communication connection with the control unit and is used for realizing interlocking control of opening and closing of a gate with the electrostatic discharge alarm instrument. The access control system can meet the special safety explosion-proof requirement in a hydrogen refueling station environment, the gate is opened and closed safely and efficiently, electrostatic discharge of operators can be ensured, and the safety degree is high.

Description

Technical Field

[0001] The present application relates to the technical field of hydrogen refueling station management and control, and specifically to an access control system for a hydrogen refueling station equipment area. Background Art

[0002] The hydrogen refueling station equipment area is the core area of ​​the station, primarily housing the various key compression and storage equipment and process pipelines, such as hydrogen storage tanks and sequence control panels, that provide hydrogen refueling services for hydrogen fuel cell vehicles and other vehicles using hydrogen fuel. Due to the colorless, odorless, flammable, and explosive nature of hydrogen, the hydrogen refueling station equipment area is a strictly controlled explosion-proof hazardous area. To ensure the safety of the hydrogen refueling station equipment area, simple doors are generally installed at the entrance and exit to prevent non-professionals from entering.

[0003] However, when hydrogen station staff enter the equipment area, they need to manually unlock and lock the door and manually push and close the door, which is a cumbersome operation. In addition, since the human body may carry static electricity, it is very easy to cause safety accidents after touching the door or entering the equipment area. Although some hydrogen stations have static discharge devices installed at the entrances and exits of the equipment area, the static discharge operation depends entirely on the quality of the personnel. There is a problem that staff members can enter the equipment area directly without performing the static discharge operation, and it is impossible to effectively record the entry and exit of personnel.

[0004] The information disclosed in this background technology section is only used to deepen the understanding of the background technology of the present disclosure and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art known to those skilled in the art. Summary of the Invention

[0005] In view of at least one of the above technical problems, the present disclosure provides a hydrogen station equipment area access control system, which aims to solve the technical problems of cumbersome door operation and high explosion-proof safety risks when entering and exiting the hydrogen station equipment area.

[0006] According to one aspect of the present disclosure, there is provided an access control system for the equipment area of ​​a hydrogen refueling station, which includes a gate arranged at the entrance and exit of the equipment area, a drive motor connected to the gate for controlling the opening and closing of the gate, an electrostatic release alarm arranged on one side of the gate for detecting and releasing incoming people and static electricity, a control unit connected to the electrostatic release alarm for communication, a motor drive module electrically connected between the control unit and the drive motor, an IC card reader connected to the control unit for realizing interlocking control of the opening and closing of the gate with the electrostatic release alarm, and a host computer.

[0007] In some embodiments of the present disclosure, the hydrogen station equipment area access control system further includes a pedestrian detector provided at the gate passage for detecting pedestrians passing through and communicatively connected to the control unit.

[0008] In some embodiments of the present disclosure, the pedestrian detector is a safety light barrier or an ultrasonic rangefinder.

[0009] In some embodiments of the present disclosure, the hydrogen station equipment area access control system further includes an in-position detection switch for detecting the opening and closing position of the gate and communicatively connected to the control unit.

[0010] In some embodiments of the present disclosure, the in-position detection switch is a limit switch.

[0011] In some embodiments of the present disclosure, the hydrogen station equipment area access control system further includes a door open indicator light, a door closed indicator light, an operation indicator light, and a fault alarm indicator light electrically connected to the control unit.

[0012] In some embodiments of the present disclosure, the control unit and the motor drive module are disposed in an explosion-proof box.

[0013] In some embodiments of the present disclosure, the motor drive module is a frequency converter.

[0014] One or more technical solutions provided in the embodiments of this application have at least any of the following technical effects or advantages:

[0015] 1. The control unit ensures safe access to the hydrogen station equipment area by professional authorized personnel through interlocking control of IC card identity recognition and electrostatic discharge action recognition of the electrostatic discharge alarm, with high safety and reliability.

[0016] 2. The access control system uses pedestrian detectors to close the gate immediately after a pedestrian passes through, preventing the risk of injury from the gate closing while a pedestrian is passing. Furthermore, flashing door open / closed indicators and fault alarm indicators alert personnel to system equipment failures or door movement, ensuring safety.

[0017] 3. The access control system control unit is connected to the host computer, which allows the host computer to store authorized personnel information and equipment area access records, making it easier for operators to query and trace them later.

[0018] 4. The gate is driven by an explosion-proof drive motor, which can improve the convenience of access control system and realize automatic opening and closing of the gate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a principle block diagram of the hydrogen station equipment area access control system in one embodiment of the present application. DETAILED DESCRIPTION

[0020] The procedures involved or relied upon in the following embodiments are all conventional or simple procedures in the art, and those skilled in the art can make conventional selections or adaptive adjustments according to specific application scenarios. The devices involved in the following embodiments, unless otherwise specified, are all conventional commercially available products.

[0021] In order to better understand the technical solution of the present application, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0022] In order to solve the problems that the door body of the equipment area of ​​the existing hydrogen station needs to be opened and closed manually and cannot ensure that the entrants can perform effective electrostatic discharge operations, and it is difficult to form reliable records of entry and exit operations, this example discloses a hydrogen station equipment area access control system, which includes a gate located at the entrance and exit of the equipment area. In order to realize the automatic opening or closing of the gate, in this embodiment, the gate transmission is connected to a drive motor, and the drive motor serves as the power source of the gate to drive the gate to open or close accordingly. In this example, the gate specifically includes a rotating shaft fixedly connected to the door body, and the opening and closing is realized by the rotation of the rotating shaft around the hinged component. Therefore, the opening and closing action of the gate can be realized by connecting the drive motor and the rotating shaft and controlling the forward and reverse rotation of the drive motor. In addition, considering the special working environment of the hydrogen station, the drive motor in this example adopts an explosion-proof motor to avoid the generation of electric sparks that have an adverse effect on the safety of the hydrogen station.

[0023] To control the opening and closing of the gate, in this embodiment, the access control system also includes a control unit housed within an explosion-proof enclosure. In this example, the control unit specifically utilizes a Siemens 1214DC / DC / DC. The isolation provided by the explosion-proof enclosure prevents sparks generated by the device's wiring terminals and other components from posing a safety hazard to the flammable and explosive environment. To enable the control unit to control the drive motor, a motor drive module is positioned between the control unit and the drive motor. The motor drive module is electrically connected to the control unit and the drive motor, respectively. Similarly, to ensure operational safety at the hydrogen refueling station, the motor drive module is also housed within the explosion-proof enclosure. In this example, the motor drive module specifically utilizes an ABB ACS510-01-03A3-4 inverter, which controls the forward and reverse rotation of the drive motor, thereby enabling the corresponding opening and closing of the gate.

[0024] For security reasons, only professional personnel are allowed to enter the equipment area of ​​the hydrogen refueling station. To this end, in this embodiment, the access control system includes an IC card reader and a host computer that are communicatively connected to the control unit. The IC card reader is mounted on a bracket or directly next to the gate. Personnel allowed to enter the equipment area are each equipped with an authorized IC card with the identity information of the authorized personnel recorded on the card. In this example, the host computer is located in the control room of the hydrogen refueling station, and the control unit and the host computer are connected by a wired connection. The host computer stores the identity information of the authorized personnel. When a person needs to enter the equipment area, he or she places his or her IC card on the IC card reader. The IC card reader then communicates with the control unit via the MODBUS RTU protocol. The control unit reads the IC card data and communicates with the host computer to query and compare the personnel identity information. If the relevant personnel identity permission is retrieved from the host computer, the control unit logically deems that the IC card has been read successfully. When the other preset door opening conditions are met, the control unit outputs a control instruction to the motor drive module to drive the gate to open. At the same time, the host computer records and stores the current personnel entry information.

[0025] To ensure the complete and effective discharge of static electricity before entering the equipment area, the equipment area access control system, in this embodiment, also includes an electrostatic discharge alarm located on one side of the gate. In this example, the electrostatic discharge alarm uses the Aupotec SD-Y model, which can measure static electricity in real time from a distance without contact, and alert incoming personnel. It also has voice broadcasting and sub-conductor static discharge functions. A communication connection is established between the electrostatic discharge alarm and the control unit of the access control system, allowing the control unit to obtain real-time data from the electrostatic discharge alarm and implement interlocking control in conjunction with the IC card reader. If and only if the person passes IC card verification and the output data of the electrostatic discharge alarm indicates that the operator has completed static discharge, the corresponding control command is output to control the gate to open.

[0026] In order to determine the appropriate time to close the gate, in this embodiment, the access control system includes a pedestrian detector located at the gate passage. The pedestrian detector detects whether there are pedestrians passing through the gate, so that the gate can be closed in time after the people pass through. Specifically, in this embodiment, the pedestrian detector is a safety grating, which is respectively arranged on both sides of the gate. Whether a pedestrian passes through is determined by whether the transmission and reception of light is blocked. In some other embodiments, the pedestrian detector is an ultrasonic rangefinder. According to the ultrasonic ranging principle, when a pedestrian passes, the ultrasonic signal of the ultrasonic rangefinder is blocked, and the detected distance becomes shorter, thereby determining that there is a person passing. In addition, the pedestrian detector is connected to the control unit in communication, and its real-time detection results are transmitted to the control unit. When the control unit receives the pedestrian passing signal output by the pedestrian detector, the interlocking gate is opened and the closing is prohibited.

[0027] In this example, a position detection switch is installed at the gate's opening and closing positions. The door-opening position detection switch and the door-closing position detection switch detect whether the gate has reached its fully opened or fully closed position, respectively. Specifically, the position detection switches in this example are limit switches, installed at the gate's fully opened or fully closed positions, respectively, to detect whether the gate has reached its fully opened or fully closed position. Furthermore, the position detection switches establish a communication connection with a control unit, which controls the start and stop of the drive motor based on the detection signals output by the position detection switches, thereby ensuring reliable opening and closing of the gate.

[0028] Furthermore, in this embodiment, the access control system's control unit is electrically connected to a door open indicator, a door closed indicator, an operation indicator, and a fault alarm indicator. When the access control system is operating normally, the operation indicator remains illuminated. In the event of a system failure, the control unit controls the operation indicator to extinguish and the fault alarm indicator to remain illuminated. Furthermore, the flashing of the door open and door close indicators prompts personnel to open and close the door, while the steady illumination of the door open and door close indicators indicates that the gate is fully opened or closed.

[0029] When the access control system for the hydrogen station equipment area is operating normally, when a person approaches the entrance or exit of the equipment area, the electrostatic discharge alarm will detect the person's approach and issue a voice reminder, reminding the relevant personnel to perform static elimination operations. When the person touches the electrostatic discharge alarm and the static electricity is eliminated, the electrostatic discharge alarm will clear the alarm and send a static discharge completion signal to the control unit. Subsequently, the person holds the IC card at the IC card reader and swipes the card. After the card is swiped and when the person's information is compared with the information stored in the host computer and there is an error, the system interlock alarm indicator will flash for 3 seconds to remind the person that the card swiping failed; when the IC card swiping is successful, the system interlock explosion-proof drive motor rotates forward, the equipment area gate opens, and the door open indicator flashes; when the door open detection switch detects that the equipment area gate is fully opened, the system interlock explosion-proof drive motor stops, and the door open indicator lights up. When a person passes through the equipment area gate and the passage safety grating detects no obstruction for 5 seconds, the system interlock explosion-proof drive motor reverses, closing the equipment area gate. Simultaneously, the door open indicator turns off and the door closed indicator flashes. When the door closed detection switch detects that the equipment area gate is fully closed, the system interlock explosion-proof drive motor stops and the door closed indicator stays on. During access control system operation, the host computer monitors and records access control system data in real time. The access control system's IC card blacklist and whitelist can be viewed, added, or modified on the host computer, and historical data records can be queried in the host computer's database at any time.

[0030] Although some preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present application.

[0031] Obviously, those skilled in the art may make various changes and modifications to this application without departing from the spirit and scope of the inventive concept. Thus, if such changes and modifications fall within the scope of the claims of this application and their equivalents, this application is intended to include such changes and modifications.

Claims

1. A hydrogen station equipment area access control system, characterized in that: It includes a gate located at the entrance and exit of the equipment area, a drive motor connected to the gate for controlling the opening and closing of the gate, an electrostatic release alarm located on one side of the gate for detecting incoming people and detecting / releasing static electricity, a control unit connected to the electrostatic release alarm for communication, a motor drive module electrically connected between the control unit and the drive motor, an IC card reader connected to the control unit for realizing interlocking control of the gate opening and closing with the electrostatic release alarm, and a host computer.

2. The hydrogen refueling station equipment area access control system according to claim 1, characterized in that: It also includes a pedestrian detector that is arranged at the gate passage for detecting pedestrians passing through and is communicatively connected to the control unit.

3. The hydrogen station equipment area access control system according to claim 2, characterized in that: The pedestrian detector is a safety grating or an ultrasonic rangefinder.

4. The hydrogen refueling station equipment area access control system according to claim 1 or 2, characterized in that: It also includes an in-position detection switch for detecting the opening and closing position of the gate and communicating with the control unit.

5. The hydrogen station equipment area access control system according to claim 4, characterized in that: The in-position detection switch is a limit switch.

6. The hydrogen station equipment area access control system according to claim 4, characterized in that: It also includes a door opening indicator light, a door closing indicator light, an operation indicator light and a fault alarm indicator light which are electrically connected to the control unit.

7. The hydrogen station equipment area access control system according to claim 1, characterized in that: The control unit and the motor drive module are arranged in an explosion-proof box.

8. The hydrogen refueling station equipment area access control system according to claim 1, characterized in that: The motor drive module is a frequency converter.

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