AVC state-controlled access control system and its use method

Abstract

The invention discloses an AVC state-controlled access control system, comprising: an access control system, an information transmission system, an AVC control system, and also an AVC state control system; the AVC state control system comprises a public measurement and control screen; the public measurement and control screen is provided with a public measurement and control device and a locking AVC control loop; the locking AVC control loop is provided with a hard pressure plate; exiting AVC: an AVC exit application signal is generated after the hard pressure plate is closed; the locking AVC control loop transmits the AVC exit application signal to the public measurement and control device, the public measurement and control device transmits the AVC exit application signal to a dispatching control center through an information transmission system, the dispatching control center automatically exits AVC through the AVC control system and transmits the AVC exit status signal to the public measurement and control device through the information transmission system, the public measurement and control device transmits the AVC exit status signal to the AVC exit status switch node of the access control system, the access control system closes the AVC exit status switch according to the AVC exit status signal, the access control system then closes the exit confirmation switch according to the access control exit button pressed by the on-site staff, and the switch room door is automatically opened.

Description

Technical Field

[0001] The present invention relates to an access control system, and in particular to an AVC state controlled access control system and a use method thereof. Background Art

[0002] The full name of the AVC system is the automatic voltage control system, which plays a huge role in achieving the economic operation of the power grid. According to the State Grid Corporation's Wutong-Substation Operation and Maintenance General Management and the "300 Typical Violations" (2019 Edition), "Before entering the high-voltage room (including the high-voltage room and the capacitor room), you must exit the AVC before entering, and remote and local operation (including hot standby) of the circuit breaker is prohibited."

[0003] At present, the AVC control system is installed in the dispatching center. The current working mode has the following problems:

[0004] 1. On-site personnel need to apply to the dispatch center to exit the AVC system when entering and exiting the switch room. However, on-site personnel cannot verify whether the system has been effectively exited on site, which violates the safety regulations that the person in charge of the work and the licensee should jointly check the safety measures taken on site, and there is a risk of violation of regulations;

[0005] 2. The door of the on-site switch room has no locking function. There are cases where maintenance staff open the door of the switch room without applying to exit the AVC and enter at will. There is currently no technical measure to effectively prevent this, which poses a huge safety hazard;

[0006] 3. The control center staff manually exits the AVC system, which results in low work efficiency and reliability. Summary of the invention

[0007] The technical problem to be solved by the present invention is that when the AVC system is in use, on-site staff of the substation need to apply to the dispatching center to exit the AVC system when entering and exiting the switch room. However, the on-site staff cannot verify on-site whether the AVC system has been effectively exited, and the switch room door has no locking function. The purpose is to provide an AVC state-controlled access control system and a method of using it to solve the problems encountered in the above-mentioned background technology.

[0008] The present invention is achieved through the following technical solutions:

[0009] An AVC state-controlled access control system, comprising: an access control system, an information transmission system, an AVC control system, and an AVC state control system;

[0010] The AVC state control system includes a common measurement and control screen;

[0011] The public measurement and control panel is equipped with a public measurement and control device and a locking AVC control circuit; the locking AVC control circuit is provided with a hard pressure plate;

[0012] Exit AVC: After the hard pressure plate is closed, an AVC exit application signal is generated; the locked AVC control loop transmits the AVC exit application signal to the public measurement and control device, and the public measurement and control device transmits the AVC exit application signal to the dispatching control center through the information transmission system. The dispatching control center automatically exits AVC through the AVC control system and transmits the AVC exit status signal to the public measurement and control device through the information transmission system. The public measurement and control device transmits the AVC exit status signal to the AVC exit status switch node of the access control system. The access control system closes the AVC exit status switch according to the AVC exit status signal. The access control system then closes the exit confirmation switch according to the access control exit button pressed by the on-site staff, and the switch room door automatically opens;

[0013] AVC activation: an AVC activation application signal is generated after the hard pressure plate is disconnected; the locked AVC control loop transmits the AVC activation application signal to the public measurement and control device, the public measurement and control device transmits the AVC activation application signal to the dispatching control center through the information transmission system, the dispatching control center automatically activates AVC through the AVC control system and transmits the AVC activation status signal to the public measurement and control device through the information transmission system, the public measurement and control device transmits the AVC activation status signal to the AVC exit status switch node of the access control system, the access control system disconnects the AVC exit status switch according to the AVC activation status signal, and the switch room door closes automatically.

[0014] When it is time to exit AVC: the on-site staff of the substation applies to the dispatching and control center through the Internet phone at the substation end to exit AVC. After the dispatching and control center agrees, the on-site staff turns the hard pressure plate in the AVC control loop clockwise to lock it. After the hard pressure plate is put on, the public measurement and control device collects the signal that the hard pressure plate is successfully put on. The signal that the hard pressure plate is successfully put on is also the AVC exit application signal. The public measurement and control device transmits the AVC exit application signal to the central switch through communication, the central switch transmits it to the telecontrol device, the telecontrol device transmits it to the dispatching control center, the dispatching control center automatically exits the AVC through the AVC control system and transmits the AVC exit status signal to the telecontrol device, the telecontrol device transmits the AVC exit status signal to the central switch, the central switch transmits the AVC exit status signal to the public measurement and control device, the public measurement and control device transmits the AVC exit status signal to the access control system of the switch room door through two cables, the access control system closes the AVC exit status switch according to the AVC exit status signal, the access control system then closes the exit confirmation switch according to the access control exit button pressed by the on-site staff, and the switch room door automatically opens.

[0015] When AVC is to be put into operation: the on-site staff of the substation applies to the dispatching and control center for AVC input through the network phone at the substation end. After the dispatching and control center agrees, the on-site staff turns the hard pressure plate in the AVC control loop counterclockwise downward to lock it. After the hard pressure plate is disconnected, the public measurement and control device collects the AVC input application signal and transmits the AVC input application signal to the central switch through communication. The central switch transmits it to the telecontrol device, which transmits it to the dispatching and control center. The dispatching and control center automatically puts AVC into operation through the AVC control system and transmits the AVC input status signal to the telecontrol device. The telecontrol device transmits the AVC input status signal to the central switch. The central switch transmits the AVC input status signal to the public measurement and control device. The public measurement and control device transmits the AVC input status signal to the access control system of the switch room door through two cables. The access control system disconnects the AVC exit status switch according to the AVC input status signal, and the switch room door closes automatically.

[0016] Furthermore, in an AVC status-controlled access control system, a terminal processing device is also provided in the public measurement and control device; the terminal processing device is a hardware driver interface on the public measurement and control device; the hardware driver interface is used to receive and convert the AVC status signal in real time and transmit it to the locked AVC control loop; the AVC status signal is an AVC exit status signal or an AVC input status signal.

[0017] The substation end is configured to receive the drive signal file of the dispatching and control center. At the same time, the public measurement and control screen in the substation is used to expand the hardware driver interface of the public measurement and control device. The hardware driver interface of the public measurement and control device is also called the terminal processing device. The terminal processing device converts the AVC status signal from the dispatching and control center into a switch contact signal, and then transmits the AVC status of the dispatching and control center to the substation in real time by adding action relays, indicator lights, etc. to the public measurement and control screen, thereby realizing the transmission of information.

[0018] Furthermore, an AVC status-controlled access control system, the locked AVC control circuit includes: a hard pressure plate, a relay, an access control status indicator light, an AVC status indicator light, and an access control exit control button; the hard pressure plate, relay, access control status indicator light, AVC status indicator light, and access control exit control button are all installed on a common measurement and control screen.

[0019] Further, an AVC state-controlled access control system further includes a switch room door and an LED display screen installed on the switch room door;

[0020] The access control system includes a control mainboard and an access control device; the control mainboard is installed in the LED screen of the switch room door, and the access control device is installed on the door frame of the switch room door. The control mainboard is used to control the access control device to lock or open the switch room door.

[0021] Furthermore, an AVC state-controlled access control system, wherein components are welded on the control main board; the components include: a single-chip microcomputer, a temperature and humidity sensor, an audio player, an infrared human body sensor, and wiring terminals; the wiring terminals include: a signal transmission wiring terminal, a voice control wiring terminal, and an access control wiring terminal.

[0022] The LED display screen installed on the door of the switch room has a built-in control motherboard, on which are welded components such as a single-chip microcomputer, temperature and humidity sensors, audio players, infrared human body sensors, and various signal transmission, voice control, and access control terminals to achieve: 1. When everything around the switch room is normal, the LED screen displays the current AVC status; 2. If someone approaches the switch room when the AVC is put into operation, a voice broadcast will remind the person not to enter, and a text prompt will be displayed on the screen; 3. If the person does not obey the voice reminder and still forcefully enters the switch room, a reliably locked electromagnet can prevent the person from entering.

[0023] Furthermore, in an AVC state-controlled access control system, the access control device is an electromagnet.

[0024] The electromagnet installed on the door frame of the switch room uses the single-chip microcomputer logic to realize the access control function. When receiving the "exit AVC system" signal, the electromagnet is reliably disconnected and personnel can enter the switch room; when receiving the "enter AVC system" signal, the electromagnet is timely attracted through the logic control of the control motherboard, reliably locking the switch room door, effectively preventing personnel from entering.

[0025] Furthermore, an AVC state-controlled access control system is provided, wherein the access control system further comprises an emergency door opening button installed on a wall outside a switch room door, wherein the emergency door opening button is used to open the switch room door in an emergency.

[0026] An emergency button is installed on the outer wall of the switch room door. If an emergency occurs and the switch room door needs to be opened in time, just press the emergency button and the door will open.

[0027] Furthermore, an AVC state-controlled access control system, the information transmission system includes a central switch and a remote control device; the remote control device is used for signal transmission and control.

[0028] A method for using an AVC state-controlled access control system comprises the following steps:

[0029] (1) Operation steps when you need to exit the AVC system:

[0030] Step 1: On-site staff calls the dispatch center to apply for exiting the AVC system;

[0031] Step 2: After obtaining permission from the dispatch center, the on-site worker rotates the hard pressure plate in the locked AVC control loop clockwise upward. After the hard pressure plate is successfully put up, the locked AVC control loop transmits the AVC exit application signal to the public measurement and control device, and the public measurement and control device transmits the AVC exit application signal to the dispatch control center through the information transmission system. The dispatch control center automatically exits the AVC through the AVC control system and transmits the AVC exit status signal to the public measurement and control device through the information transmission system. The public measurement and control device then transmits the AVC exit status signal to the locked AVC control loop;

[0032] Step 3: The staff checks the background monitoring, and the background monitoring shows an alarm event of "AVC system has exited";

[0033] Step 4: The staff checks the "AVC Status" indicator light on the public measurement and control screen, and the indicator light changes from red to green;

[0034] Step 5: The staff contacts the dispatch center to confirm that the AVC system has been exited;

[0035] Step 6: The staff presses the "Access Exit" button on the public measurement and control screen;

[0036] Step 7: The staff checks that the "Access Control Status" indicator light on the public measurement and control screen changes from red to green;

[0037] Step 8: The staff opens the door of the switch room and enters;

[0038] (2) Operation steps when the AVC system needs to be put into use:

[0039] Step 1: Personnel evacuate the switch room and close the switch room door;

[0040] Step 2: The staff calls the dispatch center to apply for the AVC system;

[0041] Step 3: After obtaining permission from the dispatch center, the on-site worker turns the hard pressure plate in the locked AVC control loop counterclockwise downward. After the hard pressure plate is successfully disconnected, the locked AVC control loop transmits the AVC input application signal to the public measurement and control device. The public measurement and control device transmits the AVC input application signal to the dispatch control center through the information transmission system. The dispatch control center automatically inputs AVC through the AVC control system and transmits the AVC input status signal to the public measurement and control device through the information transmission system. The public measurement and control device then transmits the AVC input status signal to the locked AVC control loop;

[0042] Step 4: The staff checked the background monitoring and found that the alarm event "AVC system has exited" in the background monitoring had been restored;

[0043] Step 5: The staff checks the "AVC Status" indicator light on the public measurement and control screen, and the indicator light changes from green to red;

[0044] Step 6: The staff checks that the "Access Control Status" indicator light on the public measurement and control screen turns red. At this time, the electromagnet installed on the switch room door locks the switch room door to prevent people from entering;

[0045] Step 7: The staff contacts the dispatch center to confirm that the AVC system has been put into use;

[0046] (3) If there is an emergency in the switch room, you need to enter the switch room immediately:

[0047] Step 1: Remove the protective cover of the emergency door opening device;

[0048] Step 2: Press the "Emergency Door Open" button on the switch room door firmly;

[0049] Step 3: The door opens.

[0050] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0051] The present invention provides an access control system controlled by AVC status and a method for using the same. First, the technology can realize automatic locking of the AVC control system of the dispatching control center, improving the locking quality and work efficiency. Secondly, after the locking is completed, the on-site staff can verify the AVC working status through the indicator light, avoiding the safety management risks caused by the on-site staff's inability to verify the safety measures; finally, the switch room door adopts an access control system controlled by AVC status, avoiding the personal and equipment risks caused by the staff not entering the switch room according to the process, so as to achieve the purpose of rigidly enforcing rules and regulations and ensuring the safety of people, power grids and equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings:

[0053] Figure 1 It is a system structure diagram of the present invention.

[0054] Figure 2 This is a schematic diagram of the positions of the LED display screen and the emergency door opening button outside the switch room door of the present invention.

[0055] Figure 3 It is a schematic diagram of the position of the electromagnet in the switch room door of the present invention.

[0056] Figure 4 It is a schematic diagram of the public measurement and control screen of the present invention.

[0057] Figure 5 The schematic diagram of the control mainboard of the access control system of the present invention is shown in FIG.

[0058] Marks and corresponding parts names in the attached drawings:

[0059] 1-LED display screen, 2-switch room door, 3-emergency door opening button, 4-electromagnet, 5-public measurement and control screen, 6-access control status indicator light, 7-AVC status indicator light, 8-access control exit button, 9-lock AVC control circuit, 10-hard pressure plate. DETAILED DESCRIPTION

[0060] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0061] Example

[0062] like Figure 1 As shown, an AVC state-controlled access control system includes: an access control system, an information transmission system, an AVC control system, and an AVC state control system;

[0063] The AVC state control system includes a common measurement and control screen 5;

[0064] The public measurement and control panel is equipped with a public measurement and control device and a locking AVC control circuit 9; the locking AVC control circuit 9 is provided with a hard pressure plate 10;

[0065] Exit AVC: After the hard pressure plate 10 is closed, an AVC exit application signal is generated; the locked AVC control loop 9 transmits the AVC exit application signal to the public measurement and control device 5, and the public measurement and control device 5 transmits the AVC exit application signal to the dispatching control center through the information transmission system. The dispatching control center automatically exits AVC through the AVC control system and transmits the AVC exit status signal to the public measurement and control device through the information transmission system. The public measurement and control device transmits the AVC exit status signal to the AVC exit status switch node of the access control system. The access control system closes the AVC exit status switch according to the AVC exit status signal. The access control system then closes the exit confirmation switch according to the access exit button pressed by the on-site staff, and the switch room door automatically opens.

[0066] AVC input: After the hard pressure plate 10 is disconnected, an AVC input application signal is generated; the locked AVC control loop 9 transmits the AVC input application signal to the public measurement and control device 5, and the public measurement and control device 5 transmits the AVC input application signal to the dispatching control center through the information transmission system. The dispatching control center automatically inputs AVC through the AVC control system and transmits the AVC input status signal to the public measurement and control device through the information transmission system. The public measurement and control device transmits the AVC input status signal to the AVC exit status switch node of the access control system. The access control system disconnects the AVC exit status switch according to the AVC input status signal, and the switch room door closes automatically.

[0067] When it is time to exit AVC: the on-site staff of the substation applies to the dispatching and control center to exit AVC through the Internet phone at the substation end. After the dispatching and control center agrees, the on-site staff turns the hard pressure plate 10 in the AVC control loop 9 upward clockwise to lock it. After the hard pressure plate is put on, the public measurement and control device collects the signal that the hard pressure plate is successfully put on. The signal that the hard pressure plate is successfully put on is also the AVC exit application signal. The public measurement and control device transmits the AVC exit application signal to the central switch through communication, the central switch transmits it to the telecontrol device, the telecontrol device transmits it to the dispatching control center, the dispatching control center automatically exits the AVC through the AVC control system and transmits the AVC exit status signal to the telecontrol device, the telecontrol device transmits the AVC exit status signal to the central switch, the central switch transmits the AVC exit status signal to the public measurement and control device, the public measurement and control device transmits the AVC exit status signal to the access control system of the switch room door through two cables, the access control system closes the AVC exit status switch according to the AVC exit status signal, the access control system then closes the exit confirmation switch according to the access control exit button pressed by the on-site staff, and the switch room door automatically opens.

[0068] When AVC is to be put into operation: the on-site staff of the substation applies to the dispatching and control center for AVC input through the network phone at the substation end. After the dispatching and control center agrees, the on-site staff turns the hard pressure plate in the AVC control loop counterclockwise downward to lock it. After the hard pressure plate is disconnected, the public measurement and control device collects the AVC input application signal and transmits the AVC input application signal to the central switch through communication. The central switch transmits it to the telecontrol device, which transmits it to the dispatching and control center. The dispatching and control center automatically puts AVC into operation through the AVC control system and transmits the AVC input status signal to the telecontrol device. The telecontrol device transmits the AVC input status signal to the central switch. The central switch transmits the AVC input status signal to the public measurement and control device. The public measurement and control device transmits the AVC input status signal to the access control system of the switch room door through two cables. The access control system disconnects the AVC exit status switch according to the AVC input status signal, and the switch room door closes automatically.

[0069] Furthermore, in an AVC status-controlled access control system, a terminal processing device is also provided in the public measurement and control device; the terminal processing device is a hardware driver interface on the public measurement and control device; the hardware driver interface is used to receive and convert the AVC status signal in real time and transmit it to the locked AVC control loop; the AVC status signal is an AVC exit status signal or an AVC input status signal.

[0070] The substation end is configured to receive the drive signal file of the dispatching and control center. At the same time, the public measurement and control screen in the substation is used to expand the hardware driver interface of the public measurement and control device. The hardware driver interface of the public measurement and control device is also called the terminal processing device. The terminal processing device converts the AVC status signal from the dispatching and control center into a switch contact signal, and then transmits the AVC status of the dispatching and control center to the substation in real time by adding action relays, indicator lights, etc. to the public measurement and control screen, thereby realizing the transmission of information.

[0071] like Figure 4 As shown, an AVC status controlled access control system, the locked AVC control circuit 9 includes: a hard pressure plate 10, a relay, an access control status indicator light 6, an AVC status indicator light 7, and an access control exit control button 8; the hard pressure plate 10, the relay, the access control status indicator light 6, the AVC status indicator light 7, and the access control exit control button 8 are all installed on a common measurement and control screen 5.

[0072] like Figure 2 As shown, an AVC state-controlled access control system also includes a switch room door 2 and an LED display screen 1 installed on the switch room door;

[0073] The access control system includes a control mainboard and an access control device; the control mainboard is installed in the LED screen of the switch room door, and the access control device is installed on the door frame of the switch room door 2. The control mainboard is used to control the access control device to lock or open the switch room door 2.

[0074] like Figure 4 As shown, an AVC state-controlled access control system, the control main board is welded with components; the components include: a single-chip microcomputer, a temperature and humidity sensor, an audio player, an infrared human body sensor, and wiring terminals; the wiring terminals include: a signal transmission wiring terminal, a voice control wiring terminal, and an access control wiring terminal.

[0075] The LED display screen 1 installed on the switch room door 2 has a built-in control mainboard, on which are welded components such as a single-chip microcomputer, temperature and humidity sensors, an audio player, an infrared human body sensor, and various signal transmission, voice control, and access control terminals, to achieve: 1. When everything around the switch room is normal, the LED screen displays the current AVC status; 2. If someone approaches the switch room when the AVC is put into operation, a voice broadcast will remind the person not to enter, and a text prompt will be displayed on the screen; 3. If the person does not obey the voice reminder and still forcefully enters the switch room, a reliably locked electromagnet can prevent the person from entering.

[0076] like Figure 3 As shown, an AVC state-controlled access control system, wherein the access control device is an electromagnet 4 .

[0077] The electromagnet 4 installed on the door frame of the switch room uses the single-chip microcomputer logic to realize the access control function. When receiving the "exit AVC system" signal, the electromagnet is reliably disconnected and personnel can enter the switch room; when receiving the "enter AVC system" signal, the electromagnet is timely attracted through the logic control of the control motherboard, reliably locking the switch room door, effectively preventing personnel from entering.

[0078] like Figure 2 As shown, an AVC state-controlled access control system, the access control system also includes an emergency door opening button 3 installed on the wall outside the switch room door, the emergency door opening button 3 is used to open the switch room door in an emergency.

[0079] An emergency button is installed on the outer wall of the switch room door. If an emergency occurs and the switch room door 2 needs to be opened in time, just press the emergency door opening button 3 and the door will open.

[0080] Furthermore, an AVC state-controlled access control system, the information transmission system includes a central switch and a remote control device; the remote control device is used for signal transmission and control.

[0081] A method for using an AVC state-controlled access control system comprises the following steps:

[0082] (1) Operation steps when you need to exit the AVC system:

[0083] Step 1: On-site staff calls the dispatch center to apply for exiting the AVC system;

[0084] Step 2: After obtaining permission from the dispatch center, the on-site worker rotates the hard pressure plate in the locked AVC control loop clockwise upward. After the hard pressure plate is successfully put up, the locked AVC control loop transmits the AVC exit application signal to the public measurement and control device, and the public measurement and control device transmits the AVC exit application signal to the dispatch control center through the information transmission system. The dispatch control center automatically exits the AVC through the AVC control system and transmits the AVC exit status signal to the public measurement and control device through the information transmission system. The public measurement and control device then transmits the AVC exit status signal to the locked AVC control loop;

[0085] Step 3: The staff checks the background monitoring, and the background monitoring shows an alarm event of "AVC system has exited";

[0086] Step 4: The staff checks the "AVC Status" indicator light on the public measurement and control screen, and the indicator light changes from red to green;

[0087] Step 5: The staff contacts the dispatch center to confirm that the AVC system has been exited;

[0088] Step 6: The staff presses the "Access Exit" button on the public measurement and control screen;

[0089] Step 7: The staff checks that the "Access Control Status" indicator light on the public measurement and control screen changes from red to green;

[0090] Step 8: The staff opens the door of the switch room and enters;

[0091] (2) Operation steps when the AVC system needs to be put into use:

[0092] Step 1: Personnel evacuate the switch room and close the switch room door;

[0093] Step 2: The staff calls the dispatch center to apply for the AVC system;

[0094] Step 3: After obtaining permission from the dispatch center, the on-site worker turns the hard pressure plate in the locked AVC control loop counterclockwise downward. After the hard pressure plate is successfully disconnected, the locked AVC control loop transmits the AVC input application signal to the public measurement and control device. The public measurement and control device transmits the AVC input application signal to the dispatch control center through the information transmission system. The dispatch control center automatically inputs AVC through the AVC control system and transmits the AVC input status signal to the public measurement and control device through the information transmission system. The public measurement and control device then transmits the AVC input status signal to the locked AVC control loop;

[0095] Step 4: The staff checked the background monitoring and found that the alarm event "AVC system has exited" in the background monitoring had been restored;

[0096] Step 5: The staff checks the "AVC Status" indicator light on the public measurement and control screen, and the indicator light changes from green to red;

[0097] Step 6: The staff checks that the "Access Control Status" indicator light on the public measurement and control screen turns red. At this time, the electromagnet installed on the switch room door locks the switch room door to prevent people from entering;

[0098] Step 7: The staff contacts the dispatch center to confirm that the AVC system has been put into use;

[0099] (3) If there is an emergency in the switch room, you need to enter the switch room immediately:

[0100] Step 1: Remove the protective cover of the emergency door opening device;

[0101] Step 2: Press the "Emergency Door Open" button on the switch room door firmly;

[0102] Step 3: The door opens.

[0103] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An AVC state-controlled access control system, comprising: Access control system, information transmission system, AVC control system, characterized in that it also includes AVC status control system; The AVC state control system comprises a common measurement and control screen (5); The public measurement and control panel (5) is equipped with a public measurement and control device and a locking AVC control circuit (9); the locking AVC control circuit (9) is provided with a hard pressure plate (10); The switch room door and an LED display screen (1) installed on the switch room door are provided. When everything around the switch room is normal, the LED display screen (1) displays the current AVC status. If someone approaches the switch room when the AVC is in operation, a voice broadcast reminds the person not to enter, and the LED display screen (1) displays a text prompt. Exit AVC: After the hard pressure plate (10) is closed, an AVC exit application signal is generated; the locking AVC control loop (9) transmits the AVC exit application signal to the public measurement and control screen (5), and the public measurement and control screen (5) transmits the AVC exit application signal to the dispatching control center through the information transmission system. The dispatching control center automatically exits AVC through the AVC control system and transmits the AVC exit status signal to the public measurement and control device through the information transmission system. The public measurement and control device transmits the AVC exit status signal to the AVC exit status switch node of the access control system. The access control system closes the AVC exit status switch according to the AVC exit status signal. The access control system then closes the exit confirmation switch according to the access control exit button pressed by the on-site staff, and the switch room door automatically opens; AVC input: after the hard pressure plate (10) is disconnected, an AVC input application signal is generated; the locking AVC control loop (9) transmits the AVC input application signal to the public measurement and control screen (5); the public measurement and control screen (5) transmits the AVC input application signal to the dispatching control center through the information transmission system; the dispatching control center automatically inputs AVC through the AVC control system and transmits the AVC input status signal to the public measurement and control device through the information transmission system; the public measurement and control device transmits the AVC input status signal to the AVC exit status switch node of the access control system; the access control system disconnects the AVC exit status switch according to the AVC input status signal, and the switch room door is automatically closed.

2. The AVC state-controlled access control system according to claim 1, characterized in that: A terminal processing device is also provided in the public measurement and control device; the terminal processing device is a hardware driver interface on the public measurement and control device; the hardware driver interface is used to receive and convert the AVC status signal in real time and transmit it to the locked AVC control loop; the AVC status signal is an AVC exit status signal or an AVC input status signal.

3. The AVC state-controlled access control system according to claim 1, characterized in that: The locking AVC control circuit includes: a hard pressure plate, a relay, an access control status indicator light, an AVC status indicator light, and an access control exit control button; The hard pressure plate, relay, access control status indicator light, AVC status indicator light, and access control exit control button are all installed on a common measurement and control screen.

4. The AVC state-controlled access control system according to claim 1, characterized in that: The access control system includes a control mainboard and an access control device; the control mainboard is installed in the LED screen of the switch room door, and the access control device is installed on the door frame of the switch room door. The control mainboard is used to control the access control device to lock or open the switch room door.

5. The AVC state-controlled access control system according to claim 4, characterized in that: Components are welded on the control main board; the components include: a single chip microcomputer, a temperature and humidity sensor, an audio player, an infrared human body sensor, and wiring terminals; the wiring terminals include: a signal transmission wiring terminal, a voice control wiring terminal, and an access control wiring terminal.

6. The AVC state-controlled access control system according to claim 4, characterized in that: The access control device is an electromagnet.

7. The AVC state-controlled access control system according to claim 4, characterized in that: The access control system further comprises an emergency door opening button installed on the wall outside the switch room door, and the emergency door opening button is used to open the switch room door in an emergency.

8. The AVC state-controlled access control system according to claim 1, characterized in that: The information transmission system includes a central switch and a telecontrol device; the telecontrol device is used for signal transmission and control.

9. A method for using an AVC state-controlled access control system, characterized in that: The steps include: (1) Operation steps when you need to exit the AVC system: Step 1: On-site staff calls the dispatch center to apply for exiting the AVC system; Step 2: After obtaining permission from the dispatch center, the on-site worker rotates the hard pressure plate in the locked AVC control loop clockwise upward. After the hard pressure plate is successfully put up, the locked AVC control loop transmits the AVC exit application signal to the public measurement and control device, and the public measurement and control device transmits the AVC exit application signal to the dispatch control center through the information transmission system. The dispatch control center automatically exits the AVC through the AVC control system and transmits the AVC exit status signal to the public measurement and control device through the information transmission system. The public measurement and control device then transmits the AVC exit status signal to the locked AVC control loop; Step 3: The staff checks the background monitoring, and the background monitoring shows an alarm event of "AVC system has exited"; Step 4: The staff checks the "AVC Status" indicator light on the public measurement and control screen, and the indicator light changes from red to green; Step 5: The staff contacts the dispatch center to confirm that the AVC system has been exited; Step 6: The staff presses the "Access Exit" button on the public measurement and control screen; Step 7: The staff checks that the "Access Control Status" indicator light on the public measurement and control screen changes from red to green; Step 8: The staff opens the door of the switch room and enters; (2) Operation steps when the AVC system needs to be put into use: Step 1: Personnel evacuate the switch room and close the switch room door; Step 2: The staff calls the dispatch center to apply for the AVC system; Step 3: After obtaining permission from the dispatch center, the on-site worker turns the hard pressure plate in the locked AVC control loop counterclockwise downward. After the hard pressure plate is successfully disconnected, the locked AVC control loop transmits the AVC input application signal to the public measurement and control device. The public measurement and control device transmits the AVC input application signal to the dispatch control center through the information transmission system. The dispatch control center automatically inputs AVC through the AVC control system and transmits the AVC input status signal to the public measurement and control device through the information transmission system. The public measurement and control device then transmits the AVC input status signal to the locked AVC control loop; Step 4: The staff checked the background monitoring and found that the alarm event "AVC system has exited" in the background monitoring had been restored; Step 5: The staff checks the "AVC Status" indicator light on the public measurement and control screen, and the indicator light changes from green to red; Step 6: The staff checks that the "Access Control Status" indicator light on the public measurement and control screen turns red. At this time, the electromagnet installed on the switch room door locks the switch room door to prevent people from entering; Step 7: The staff contacts the dispatch center to confirm that the AVC system has been put into use; (3) If there is an emergency in the switch room, you need to enter the switch room immediately: Step 1: Remove the protective cover of the emergency door opening device; Step 2: Press the "Emergency Door Open" button on the switch room door firmly; Step 3: The door opens.

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