Access control system

Abstract

The utility model relates to the technical field of access control, in particular to an access control system, which comprises a power supply, a controller and a controller, the access control button is used for sending a door opening instruction and sending the door opening instruction to the access controller; the card reader is used for acquiring a door opening signal and sending the door opening signal to the access controller; the access controller is used for sending a door opening / closing instruction to the electromagnetic lock according to the door opening instruction and the door opening signal; and the electromagnetic lock is used for controlling opening and closing of an access control according to the door opening / closing instruction. According to the utility model, the automatic door opening button and the emergency door opening button are arranged, so that the system depends on the automatic door opening button to carry out authority control under the normal condition, and the door can be forcibly opened through the emergency door opening button under the emergency condition, thereby ensuring the safe evacuation of personnel.

Description

Technical Field

[0001] The utility model relates to the technical field of access control, and specifically relates to an access control system. Background Art

[0002] With the continuous development of the modern office environment, the access control system, as an important part of ensuring the safety of office premises, has been increasingly valued for its functionality and security. Traditional access control systems mainly consist of components such as access control controllers, card readers, exit buttons, power modules, electromagnetic locks, etc., and achieve access control by reading cards to identify permissions. However, in emergency situations, such as when a fire occurs, ensuring that personnel can evacuate quickly and unobstructed becomes a key consideration in the design of access control systems.

[0003] According to the provisions of GB50016 "Code for Fire Protection Design of Buildings", evacuation doors in crowded places and exterior doors of specific buildings should be equipped with emergency switches to ensure that they can be easily opened from the inside without using keys or other tools in emergency situations such as fires. This requirement aims to improve the safety performance of buildings and ensure the life safety of personnel in emergency situations.

[0004] Currently, most access control systems on the market use glass break switches as emergency unlocking devices. The glass break switch is triggered by physical damage (usually breaking the glass), cutting off the power supply of the electromagnetic lock, thereby achieving emergency door opening.

[0005] However, this design has the following problems:

[0006] 1. Inconvenient maintenance: Once the glass break switch is activated, the broken glass panel needs to be replaced, which not only increases the maintenance cost but also makes the operation process cumbersome and is not conducive to quickly restoring the normal operation of the access control system.

[0007] 2. Difficult testing: Due to the irreversibility of the glass break switch, regular testing of the emergency switch function requires using special tools to simulate activation, which cannot truly reflect the operation process in emergency situations and reduces the accuracy and efficiency of testing.

[0008] 3. Insufficient fault detection: When there are abnormalities in the internal circuit of the emergency switch, there is no effective warning mechanism to promptly send an alarm to the management personnel, which may cause the switch to fail in emergency situations and endanger the safety of personnel.

[0009] In view of the above problems, the emergency switch design of existing access control systems urgently needs to be improved to enhance its reliability and usability in emergency situations, while reducing maintenance costs and enhancing the overall security of the system. Content of the Utility Model

[0010] The purpose of the utility model is to provide an access control system to solve the problems raised in the above background art.

[0011] The technical solution of the present utility model is: An access control system, comprising:

[0012] A power supply for providing operating power;

[0013] An access control button for sending an opening instruction and sending the opening instruction to the access control controller;

[0014] A card reader for obtaining an opening signal and sending the opening signal to the access control controller;

[0015] An access control controller for sending an opening / closing instruction to the electromagnetic lock according to the opening instruction and the opening signal;

[0016] An electromagnetic lock for controlling the opening and closing of the access control according to the opening / closing instruction.

[0017] Furthermore, the access control button includes an automatic opening button and an emergency opening button. The automatic opening button is arranged on one side of the emergency opening button, and both the automatic opening button and the emergency opening button are arranged on the outer surface of the button frame. At the same time, an emergency button abnormal alarm circuit is arranged inside the emergency opening button, and the emergency button abnormal alarm circuit is electrically connected to the emergency opening button.

[0018] Furthermore, a rocker type self-resetting switch is arranged inside the automatic opening button, and a rocker type two-position switch is arranged inside the emergency opening button.

[0019] Furthermore, the automatic opening output contact KM1 of the access control controller is electrically connected to the normally closed contact SW2 of the emergency opening button, the emergency button abnormal alarm circuit and the positive pole of the 12V power supply. At the same time, both the emergency opening button SW2 and the emergency button abnormal alarm circuit are electrically connected to the negative pole of the 12V power supply through the access control magnetic lock YL.

[0020] Furthermore, the access control controller is electrically connected to the card reader, and at the same time, the electromagnetic lock is electrically connected to the normally open contact SW1 of the automatic opening button.

[0021] Furthermore, the emergency button abnormal alarm circuit includes an alarm indicator L and an alarm buzzer HA. The alarm indicator L is arranged at the upper end of the emergency opening button, and the alarm buzzer HA is arranged on the outer side of the button frame.

[0022] Furthermore, the alarm indicator L is electrically connected to a resistor R1, the alarm buzzer HA is electrically connected to a resistor R2, and the series circuit composed of the alarm indicator L and the resistor R1, the series circuit composed of the alarm buzzer HA and the resistor R2, and the normally closed contact SW2 of the emergency opening button are mutually parallel.

[0023] The present utility model provides an access control system through improvements. Compared with the prior art, it has the following improvements and advantages:

[0024] First: By setting an automatic door opening button and an emergency door opening button, the system relies on the automatic door opening button for permission control under normal circumstances, and can forcibly open the door through the emergency door opening button in case of emergency, ensuring the safe evacuation of personnel.

[0025] Second: When the emergency door opening button is abnormal, the abnormal alarm circuit built therein can immediately activate the alarm indicator light and buzzer, promptly notify the management personnel, and ensure the stability and security of the system.

[0026] Third: The current-limiting resistors R1 and R2 in the alarm circuit of the present utility model can not only protect the alarm components from over-current damage, but also ensure that when the emergency switch is disconnected, the current in the circuit can not only meet the normal operation of the alarm components, but also will not accidentally trigger the opening of the access control electromagnetic lock, maintaining the overall security and functionality of the system. Description of the Drawings

[0027] The following further explains the present utility model in conjunction with the drawings and embodiments:

[0028] Figure 1 is the circuit diagram of the access control system of the present utility model. Detailed Embodiment

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0030] In addition, it should be understood that for the sake of description, the dimensions of the various components shown in the drawings are not drawn in actual proportional relationships. For example, the thickness or width of some layers may be exaggerated relative to other layers.

[0031] It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined or described in one drawing, it will not be necessary to further specifically discuss and describe it in the subsequent description of the drawings.

[0032] Reference Figure 1, this embodiment provides an access control system, which includes a power supply, an access control button, a card reader, an access control controller, and an electromagnetic lock. Among them, the power supply is used to provide the working power supply for the entire access control system. The access control button is used to send an opening instruction and send the obtained opening instruction to the access control controller. The card reader is used to obtain an opening signal and send the obtained opening signal to the access control controller. The access control controller is used to send an opening / closing instruction to the electromagnetic lock according to the received opening instruction and opening signal. The electromagnetic lock is used to control the opening and closing of the access control according to the received opening / closing instruction. That is to say, both the access control button and the card reader can be used to start the access control controller, and the opening and closing of the access control are controlled through the access control controller and the electromagnetic lock.

[0033] In this embodiment, the access control button includes a button frame, which uses the installation size of an 86 switch box. An automatic opening button and an emergency opening button are installed on its outer surface, and the automatic opening button is arranged on one side of the emergency opening button. At the same time, an emergency button abnormal alarm circuit is arranged inside the emergency opening button, and the emergency button abnormal alarm circuit is electrically connected to the emergency opening button. It should be noted that a rocker-type self-resetting switch is arranged inside the automatic opening button, and a rocker-type two-position switch is arranged inside the emergency opening button. It should be noted that the rocker-type two-position switch needs to be manually reset after it operates.

[0034] In this embodiment, the automatic opening button is set as a normally open contact SW1, and the emergency opening button is set as a normally closed contact SW2. Specifically, in the access control electromagnetic lock circuit, there are an access control controller and a card reader. The card reader is electrically connected to the access control controller, and at the same time, the electromagnetic lock is electrically connected to the normally open contact SW1 of the automatic opening button. Further, the automatic opening output contact KM1 of the access control controller is electrically connected to the normally closed contact SW2 of the emergency opening button, the emergency button abnormal alarm circuit, and the positive pole of the 12V power supply. At the same time, both the emergency opening button SW2 and the emergency button abnormal alarm circuit are electrically connected to the negative pole of the 12V power supply through the access control magnetic lock YL. Furthermore, the emergency button abnormal alarm circuit includes an alarm indicator L and an alarm buzzer HA. The alarm indicator L is arranged at the upper end of the emergency opening button, and the alarm buzzer HA is arranged on the outer side of the button frame. At the same time, the alarm indicator L is electrically connected to the resistor R1, and the alarm buzzer HA is electrically connected to the resistor R2. The series circuit composed of the alarm indicator L and the resistor R1, the series circuit composed of the alarm buzzer HA and the resistor R2, and the normally closed contact SW2 of the emergency opening button are connected in parallel with each other.

[0035] Further, when the internal wire of the emergency door opening button is broken or the button is in the actuated position, the alarm indicator light L lights up to give a visual alarm indication. When the internal wire of the emergency door opening button is broken or it is in the actuated position, the loop current drives the alarm buzzer HA to give an audible alarm. At the same time, the current-limiting resistors R1 and R2 can, on the one hand, protect the operating currents of the alarm indicator light L and the alarm buzzer HA within the rated current. On the other hand, when the normally closed contact SW2 of the emergency door opening button is disconnected, the current in the loop can be limited so that it can meet the operating currents of the alarm indicator light L and the alarm buzzer HA and is lower than the operating current of the access control electromagnetic lock.

[0036] In this embodiment, the 12V power supply provides the operating power for the access control electromagnetic lock circuit to drive the operation of the access control electromagnetic lock. The access control controller is used to receive the door opening request signals from the access control button and the card reader, and after internal operation, outputs a door opening instruction to make the contact KM1 actuate. Further, when the automatic door opening button is pressed during normal door opening, the door opening request signal is sent into the access control controller through the normally open contact SW1 of the automatic door opening button. In an emergency, when the emergency door opening button is pressed, the power supply of the access control electromagnetic lock is directly cut off and the door is opened.

[0037] Specifically, the working process of the access control button in this embodiment is as follows:

[0038] The normal locking of the access control button is as follows:

[0039] The current generated by the 12V power supply passes through the automatic door opening output contact KM1 of the access control controller, the normally closed contact SW2 of the emergency door opening button, and the access control electromagnetic lock YL back to the negative pole of the 12V power supply. The access control electromagnetic lock YL is powered on and in the normal working state, and the access control is locked. Since the normally closed contact SW2 of the emergency door opening button is connected in parallel with the emergency button abnormal alarm circuit and the normally closed contact SW2 of the emergency door opening button is in the normal closed state, the current passing through the emergency button abnormal alarm circuit is close to 0 and the emergency button abnormal alarm circuit does not operate.

[0040] The normal door opening of the access control button is as follows:

[0041] After pressing the automatic door opening button or verifying the door opening information on the card reader, the access control controller receives the door opening signal from the normally open contact SW1 of the automatic door opening button or the door opening signal from the access control card reader. After internal operation of the access control controller, the door opening relay is actuated, that is, the automatic door opening output contact KM1 of the access control controller changes from the closed state to the open state, the access control electromagnetic lock YL loses power, the door is opened, and people can pass through.

[0042] The emergency door opening of the access control button is as follows:

[0043] When the access control controller fails or other failures occur, indoor personnel cannot normally open the access control through the automatic door opening button. At this time, press the emergency door opening button urgently. The normally closed contact SW2 of the emergency door opening button changes from closed to open, the access control electromagnetic lock YL loses power and opens, and at the same time, the emergency button abnormal alarm circuit gives out an audible and visual alarm.

[0044] The abnormal alarm of the access control button is as follows:

[0045] When the access control is normally locked, when the internal contact of the emergency switch is broken, or the emergency switch is not restored after use, or the emergency switch test action is performed, the normally closed contact SW2 of the emergency door opening button is disconnected. At this time, the current generated by the 12V power supply passes through the automatic door opening output contact KM1 of the access control controller, the emergency button abnormal alarm circuit, and the access control electromagnetic lock YL and returns to the negative pole of the 12V power supply. Due to the resistance selection of the current limiting resistors R1 and R2 in the emergency button abnormal alarm circuit, the working current in the control circuit can be made greater than the working current of the alarm indicator L and the alarm buzzer HA and less than the minimum locking working current of the access control electromagnetic lock YL, so that the current can drive the emergency button abnormal alarm circuit to give out an audible and visual alarm. The alarm disappears until the fault is eliminated and the initial state of the emergency button is restored.

[0046] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An access control system, characterized in that, It includes: A power supply for providing working power. An access control button for sending an opening instruction and sending the opening instruction to the access control controller. A card reader for obtaining an opening signal and sending the opening signal to the access control controller. An access control controller for sending an open / close door instruction to the electromagnetic lock according to the opening instruction and the opening signal. An electromagnetic lock for controlling the opening and closing of the access control according to the open / close door instruction.

2. The access control system according to claim 1, wherein The access control button includes an automatic opening button and an emergency opening button. The automatic opening button is arranged on one side of the emergency opening button, and both the automatic opening button and the emergency opening button are arranged on the outer surface of the button frame. At the same time, an emergency button abnormal alarm circuit is arranged inside the emergency opening button, and the emergency button abnormal alarm circuit is electrically connected to the emergency opening button.

3. An access control system according to claim 2, characterized in that, A rocker type self-resetting switch is arranged inside the automatic opening button, and a rocker type two-position switch is arranged inside the emergency opening button.

4. The access control system according to claim 1, wherein, The automatic opening output contact KM1 of the access control controller is electrically connected to the normally closed contact SW2 of the emergency opening button, the emergency button abnormal alarm circuit and the positive pole of the 12V power supply. At the same time, both the emergency opening button SW2 and the emergency button abnormal alarm circuit are electrically connected to the negative pole of the 12V power supply through the access control magnetic lock YL.

5. An access control system according to claim 1, characterized in that, The access control controller is electrically connected to the card reader, and at the same time, the electromagnetic lock is electrically connected to the normally open contact SW1 of the automatic opening button.

6. An access control system according to claim 2 or 4, characterized in that, The emergency button abnormal alarm circuit includes an alarm indicator L and an alarm buzzer HA. The alarm indicator L is arranged at the upper end of the emergency opening button, and the alarm buzzer HA is arranged on the outer side of the button frame.

7. An access control system according to claim 6, wherein The alarm indicator L is electrically connected to a resistor R1, the alarm buzzer HA is electrically connected to a resistor R2, and the series circuit composed of the alarm indicator L and the resistor R1, the series circuit composed of the alarm buzzer HA and the resistor R2, and the normally closed contact SW2 of the emergency opening button are connected in parallel with each other.

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