A non-contact access control switch circuit and device thereof and access control

Abstract

The utility model discloses a contactless access control switch circuit and its device and access control, including: an output interface module for connecting an external line; a microcontroller module, including an MCU microcontroller and its peripheral circuits; a buck / voltage stabilization circuit module for bucking / stabilizing an input voltage, connected to the microcontroller module; a voice control circuit module for controlling voice signal output; a shielding signal generating circuit and an amplifying circuit module for sending and receiving infrared light wave signals; a switch door control circuit module for controlling the opening of the access control; a buzzer circuit module for emitting a buzzer reminder sound; a switch door state indication circuit module for switching the color of a light emitting diode to indicate a change in the door opening state. The utility model controls the access control switch by means of infrared waves, and compared with the wireless radio frequency method of the prior art, has the advantages of preventing interference and being easy to control, and greatly increases the sensing distance through the amplifying circuit.

Description

Technical Field

[0001] The utility model relates to a door access switch circuit and a device thereof, in particular to a contactless door access switch circuit and a device thereof and a door access. Background Art

[0002] The access control system of the prior art has the following problems: after pressing the switch of the access control system, it is impossible to know whether the door is actually opened, and you need to push it to know. The push switch is a mechanical switch, and the pressing force of each person is different. Multiple presses will affect the mechanical life of the switch. Because the access control switch is a switch used in public places, different people often press it. Direct contact with the switch can easily cause the spread of viruses / bacteria, and personal hygiene problems cannot be solved. The above problems have not been satisfactorily solved, and can no longer meet people's requirements, and they are in urgent need of improvement. Utility Model Content

[0003] The purpose of the utility model is to provide a non-contact access control switch circuit and a device thereof and access control, so as to solve the defects existing in the prior art.

[0004] The utility model provides the following solutions:

[0005] A non-contact access control switch circuit, comprising:

[0006] Output interface module, used to connect external lines;

[0007] A microcontroller module, including a microcontroller and its peripheral circuits;

[0008] A step-down / voltage stabilization circuit module is used to step down / stabilize the input voltage and is connected to the microcontroller module;

[0009] A voice control circuit module, used to control the output of voice signals;

[0010] The shielding signal generating circuit and the amplifying circuit module are used to send and receive infrared light wave signals;

[0011] Door opening and closing control circuit module, used to control the door opening;

[0012] A buzzer circuit module is used to emit a buzzer reminder sound;

[0013] The switch door status indication circuit module switches the color of the LED.

[0014] Furthermore, a linear voltage stabilization chip is provided in the voltage-step-down / voltage-stabilization circuit module.

[0015] Furthermore, the pin of the linear voltage regulator chip is connected to the cathode of a voltage regulator diode, and the anode of the voltage regulator diode is connected to the power supply.

[0016] Furthermore, the microcontroller module is provided with an output pin for transmitting a pulse wave.

[0017] Furthermore, the microcontroller in the microcontroller module is interconnected with the door opening and closing control circuit module for controlling the access control door opening.

[0018] Furthermore, a light emitting diode and a transistor are provided in the switch door state indicating circuit module, the cathode of the light emitting diode is connected in parallel to the collector of the transistor, and the anode of the light emitting diode is connected in parallel to the power supply.

[0019] Furthermore, the light emitting diode comprises a first light emitting diode and a second light emitting diode, the cathodes of the first light emitting diode and the second light emitting diode are connected in parallel to one end of a first resistor, and the other end of the first resistor is connected to the collector of the transistor;

[0020] The base of the transistor is connected to one end of a second resistor, and the other end of the second resistor is connected to a light emitting diode control pin of a microcontroller in the microcontroller module.

[0021] Furthermore, the door opening and closing control circuit module is provided with a signal relay for controlling the opening and closing of the door.

[0022] A contactless access control switch device is provided with the contactless access control switch circuit.

[0023] A door access control system is provided with the non-contact door access control switch device.

[0024] Compared with the prior art, the utility model has the following advantages:

[0025] The utility model controls the access control switch by infrared waves, which has the advantages of preventing interference and being easy to control compared with the wireless radio frequency method in the prior art, and greatly increases the sensing distance through the amplification circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 It is the principle block diagram of the contactless access control switch circuit.

[0028] Figure 2It is the circuit schematic diagram of the microcontroller module.

[0029] Figure 3 It is the circuit schematic diagram of the output interface and voltage stabilizing circuit.

[0030] Figure 4 It is the circuit schematic diagram of the voice control circuit module.

[0031] Figure 5 It is a circuit schematic diagram of the shielding signal generating circuit and the amplifying circuit module.

[0032] Figure 6 It is the circuit schematic diagram of the switch door control circuit module.

[0033] Figure 7 This is the circuit schematic diagram of the buzzer circuit module.

[0034] Figure 8 It is the circuit schematic diagram of the switch door status indication circuit module. DETAILED DESCRIPTION

[0035] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] like Figures 1 to 8 The non-contact access control switch circuit shown includes:

[0037] The output interface module is used to connect external lines. The function of the output interface module is to serve as an output wiring port, and the user connects the wires according to the markings.

[0038] The microcontroller module includes the MCU microcontroller and its peripheral circuits. The core of the MCU microcontroller and its peripheral circuits is the MCU main control unit chip, which can be functionally compiled through program code. The output pin of the MCU main control unit chip outputs a pulse wave of a certain frequency to the infrared transmitting tube. The infrared transmitting tube is turned on and off at this frequency, and the infrared light is sent out intermittently. The receiving tube compares the received infrared signal. If the received frequency is consistent with the transmitted frequency, it is considered to be a valid signal and the door opening command will be executed. Otherwise, it is considered to be an interference signal and no processing is performed.

[0039] A step-down / voltage stabilization circuit module is used to step down / stabilize the input voltage and is connected to the microcontroller module;

[0040] The voice control circuit module is used to control the voice signal output. In the voice control circuit module, when the effective signal of the microcontroller module makes a door opening command, the voice control circuit module simultaneously broadcasts the door opening voice as a reminder, and at the same time, the door opening and closing status indicator of the door opening and closing status indication circuit module also changes from red to green, and the voice and light synchronously remind, indicating that the door is open.

[0041] The shielding signal generating circuit and the amplifying circuit module are used to send and receive infrared light wave signals;

[0042] The transmitting tube in the blocking signal generating circuit and the amplifying circuit module realizes the switching function according to the output frequency of the MCU microcontroller in the microcontroller module, and transmits the infrared light intermittently. When there is an external object blocking the infrared light, the infrared light is reflected back. This signal is amplified by the receiving tube and then transmitted to the microcontroller module. Because the transmitting tube in this circuit is switched at a certain frequency, the anti-interference performance is greatly enhanced. At the same time, because the amplifying circuit is added, the sensing distance is also greatly increased.

[0043] The door opening and closing control circuit module is used to control the door opening of the access control system. By receiving the effective signal from the microcontroller module, it sends a door opening command to the access control system to control the door opening.

[0044] The buzzer circuit module is used to emit a "beep...beep..." buzzer reminder sound.

[0045] The door opening and closing state indication circuit module switches the color of the light emitting diode to indicate the change of the door opening state. For example, when the MCU microprocessor in the microcontroller module receives a valid signal and issues a door opening command, the door opening and closing state indication circuit module switches the color of the LED light as a color indication of the state change.

[0046] In this embodiment, the buzzer circuit module and the door open / close state indication circuit module have the same function, and the two are used in different occasions, and only one can be selected.

[0047] Preferably, a linear voltage stabilization chip is provided in the voltage-step-down / voltage-stabilization circuit module.

[0048] Preferably, the pin of the linear voltage regulator chip is connected to the cathode of a voltage regulator diode, and the anode of the voltage regulator diode is connected to the power supply.

[0049] In this embodiment, the role of the linear voltage regulator chip and the voltage regulator diode in the LED circuit is to ensure the normal operation of the LED lamp and extend its service life. The linear voltage regulator chip mainly stabilizes the input voltage and provides a constant output current. The LED lamp can only emit light normally under a specific driving current, and the input power supply often has current ripples, which will affect the brightness and life of the LED lamp.

[0050] In this embodiment, by using a linear voltage regulator chip, an unstable input voltage can be converted into a constant output current suitable for the operation of the LED lamp, thereby ensuring that the LED lamp always operates at a constant brightness and reducing excessive impact on external environmental changes (such as temperature, load, etc.).

[0051] For example, in an access control system, if there is no linear voltage regulator chip to control the drive current, when the power supply fluctuates, all LED lights connected to the supply will be affected, so it is necessary to add a linear voltage regulator chip to adjust the output drive current so that all LEDs can operate at the same brightness.

[0052] Zener diodes are also widely used to protect and limit input power and prevent reverse breakdown. Since light-emitting diodes have a low rated operating voltage (usually 2-4V), they are easily damaged when directly connected to high-power or high-frequency signal sources. This can be effectively prevented by introducing a properly selected diode for limitation and ensuring that its forward bias is within a safe range.

[0053] In summary, in this embodiment, the linear voltage regulator chip and the voltage regulator diode in the buck / voltage regulator circuit module provide reliable and constant driving conditions, and increase the protection and control of the LED lamp under external interference and abnormal conditions.

[0054] Preferably, the microcontroller module is provided with an output pin for transmitting a pulse wave.

[0055] The principle of the pin emitting pulse waves: the infrared emitting tube is turned on and off at this frequency, and the infrared light is transmitted intermittently. The receiving tube compares the received infrared signal. If the received frequency is consistent with the transmitted frequency, it is considered to be a valid signal and the door opening command will be executed. Otherwise, it is considered to be an interference signal and no processing will be done.

[0056] Preferably, the MCU microcontroller in the microcontroller module is interconnected with the door opening and closing control circuit module for controlling the access control and opening of the door.

[0057] Preferably, a light emitting diode and a transistor are provided in the switch door state indicating circuit module, the cathode of the light emitting diode is connected in parallel to the collector of the transistor, and the anode of the light emitting diode is connected in parallel to the power supply.

[0058] Preferably, the light emitting diode comprises a first light emitting diode and a second light emitting diode, the cathodes of the first light emitting diode and the second light emitting diode are connected in parallel to one end of a first resistor, and the other end of the first resistor is connected to the collector of the transistor;

[0059] The base of the transistor is connected to one end of the second resistor, and the other end of the second resistor is connected to the light emitting diode control pin of the MCU microcontroller in the microcontroller module. By connecting the base of the transistor to one end of the second resistor, a signal can be transmitted to the transistor, and by connecting the other end of the second resistor to the pin of the MCU microcontroller in the microcontroller module for controlling the on and off state of the light emitting diode, the microcontroller can switch the light emitting diode.

[0060] Preferably, the door opening and closing control circuit module is provided with a signal relay for controlling the opening and closing of the door.

[0061] Exemplarily, a signal relay is a device that can perform high-power output operations under low-power input signals. The signal relay includes a coil and multiple contacts. When the coil receives an input signal, it generates a magnetic field to cause the contacts to move, thereby opening or closing other circuits. In this embodiment, the access control system is connected to the signal relay. After obtaining legal identity verification, the access control system will send a low-power control signal to the coil connected to the signal relay. After receiving the control signal, the coil will be activated and generate a magnetic field effect to complete the action of the relay.

[0062] For example: when the coil is activated (ie, a valid control signal is received), the contacts are closed, indicating that the door needs to be closed.

[0063] When the coil is activated (i.e. receives a valid control signal), the contacts open, indicating that the door needs to be opened.

[0064] In summary, it can be seen that by using the signal relay provided in the door opening and closing control circuit module, the access control system can be remotely and intelligently monitored and controlled.

[0065] Based on the above embodiments, the utility model further provides a contactless access control switch device and a corresponding access control, wherein the contactless access control switch device is provided with the contactless access control switch circuit.

[0066] A door access control system is provided with the non-contact door access control switch device.

[0067] Those skilled in the art will appreciate that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as those generally understood by those skilled in the art in the field to which the present invention belongs. It should also be understood that terms such as those defined in general dictionaries should be understood to have meanings consistent with those in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless specifically defined.

[0068] It should be noted that certain words are used in this specification and claims to refer to specific components. Those skilled in the art should understand that different manufacturers and producers may use different terms to refer to the same component. This specification and claims do not use the difference in terms as a way to distinguish components, but use the difference in the functions of the components as the criterion for distinction.

[0069] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0070] In addition, those skilled in the art will appreciate that, although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present invention and form different embodiments. For example, any one of the embodiments claimed in the claims can be used in any combination in the embodiments of the present invention.

[0071] It will be understood by those skilled in the art that the "terminal" and "terminal device" used herein include both devices with wireless signal receivers, which are devices with only wireless signal receivers without transmission capabilities, and devices with receiving and transmitting hardware, which are devices with receiving and transmitting hardware capable of performing two-way communication on a two-way communication link. Such devices may include: cellular or other communication devices, which have a single-line display or a multi-line display or a cellular or other communication device without a multi-line display.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A non-contact access control switch circuit, characterized in that: include: Output interface module, used to connect external lines; A microcontroller module, comprising a microcontroller and its peripheral circuits, wherein the microcontroller module is provided with an output pin for transmitting a pulse wave, and the microcontroller in the microcontroller module is interconnected with the door switch control circuit module for controlling the door opening; A step-down / voltage stabilization circuit module, used for stepping down / stabilizing the input voltage, connected to the microcontroller module, wherein a linear voltage stabilization chip is provided in the step-down / voltage stabilization circuit module, wherein a pin of the linear voltage stabilization chip is connected to the cathode of a voltage stabilization diode, and the anode of the voltage stabilization diode is connected to the power supply; The voice control circuit module is used to control the output of the voice signal. In the voice control circuit module, when the effective signal of the microcontroller module makes a door opening command, the voice control circuit module simultaneously broadcasts the door opening voice, and at the same time, the door opening and closing status indicator of the door opening and closing status indicator circuit module also changes from red to green, and the door is opened through the synchronous reminder of voice and light; The blocking signal generating circuit and the amplifying circuit module are used to send and receive infrared light wave signals. The transmitting tube in the blocking signal generating circuit and the amplifying circuit module realizes the switching function according to the output frequency of the microcontroller in the microcontroller module, and transmits the infrared light intermittently. When there is an external object blocking the infrared light, the infrared light is reflected back. This signal is amplified by the receiving tube and then transmitted to the microcontroller module; The door opening and closing control circuit module is used to control the door opening of the access control. The door opening and closing state indication circuit module is provided with a light emitting diode and a transistor. The cathode of the light emitting diode is connected in parallel to the collector of the transistor, and the anode of the light emitting diode is connected in parallel to the power supply. A buzzer circuit module is used to emit a buzzer reminder sound; The door opening and closing state indication circuit module switches the color of the light emitting diode. When the microprocessor in the microcontroller module receives a valid signal and issues a door opening command, the door opening and closing state indication circuit module switches the color of the LED light as a color indication of the state change.

2. The contactless access control switch circuit according to claim 1, characterized in that: The light emitting diode comprises a first light emitting diode and a second light emitting diode, the cathodes of the first light emitting diode and the second light emitting diode are connected in parallel to one end of a first resistor, and the other end of the first resistor is connected to the collector of the transistor; The base of the transistor is connected to one end of a second resistor, and the other end of the second resistor is connected to a light emitting diode control pin of a microcontroller in the microcontroller module.

3. The contactless access control switch circuit according to claim 1, characterized in that: The door opening and closing control circuit module is provided with a signal relay for controlling the opening and closing of the door.

4. A non-contact access control switch device, characterized in that: The contactless access control switch device is provided with the contactless access control switch circuit according to any one of claims 1 to 3.

5. A door access control system, characterized in that: The access control system is provided with the non-contact access control switch device as claimed in claim 4.

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