Human body infrared induction access control circuit and system thereof

Abstract

The utility model provides a human body infrared induction access control circuit and a system thereof, the output end of a human body infrared induction module is connected with the input end of a level conversion delay control module, and the human body infrared induction module is used for emitting induced human body infrared rays and transmitting signals to the level conversion delay control module; and the output end of the level conversion delay control module is connected with the input end of the access controller, so that the access controller can automatically open a door when a person arrives at a position 3-5 meters in front of the door, the use convenience of the access controller is improved, an existing mechanical push switch is replaced, and the installation cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to access control system technical field, more specifically, it relates to a human body infrared induction access control circuit and system thereof. BACKGROUND

[0002] With the development of modern technology, people's safety consciousness is constantly improved, and the requirement of security management level of community, housing or office area also increases, and the access control system is used more to increase the security of factory, office, apartment and dormitory, and to control the door and passage.

[0003] In the prior art, the existing access control is mostly through the mechanical pressing switch to give a signal to the access controller, and the access controller completes the unlocking and locking work after a period of time according to the unlocking signal.

[0004] (1) The personnel must pass through the pressing switch, and when the personnel is inconvenient to press or does not want to touch the door switch for the need of cleanliness, the access control cannot be opened.

[0005] (2) The existing access controller door switch needs to be installed by punching and wiring, and the installation cost is high.

[0006] Therefore, the utility model provides a kind of installation cost low, can automatically open door, a human body infrared induction access control circuit and system thereof. UTILITY MODEL CONTENT

[0007] The utility model provides a kind of installation cost low, can automatically open door, a human body infrared induction access control circuit and system thereof.

[0008] A human body infrared induction access control circuit, including human body infrared induction circuit, level conversion delay control circuit, access controller, ACDC converter, its characterized in that: human body infrared induction circuit output and level conversion delay control circuit input are connected, human body infrared induction circuit is used to induct human body infrared emission and transmit analog signal to level conversion delay control circuit, level conversion delay control circuit output and access controller input are connected, level conversion delay control circuit is used to convert analog signal into digital signal and trigger delay, ACDC converter and access controller are electrically connected, and ACDC converter is used to provide power supply for access controller.

[0009] Further, the level conversion delay control circuit comprises Q1 triode, U1 photoelectric coupler, U2 chip, R4 resistor, adjustable resistor RP, C4 capacitor, capacitor C1, capacitor C2, capacitor C3, the output end of the human body infrared induction circuit is connected with the base of the Q1 triode, the emitter of the Q1 triode is grounded, the collector of the Q1 triode is connected with the negative electrode of the light emitting tube of the U1 photoelectric coupler, the light emitting tube of the U1 photoelectric coupler is connected with the positive electrode VCC of the power supply, the output end collector of the U1 photoelectric coupler is connected with the 2 pin of the U2 chip, the output end emitter of the U1 photoelectric coupler is grounded, the 2 pin of the U2 chip is connected with the positive electrode VCC of the power supply through the resistor R4, the 6 pin and the 7 pin of the U2 chip are short-circuited at one end and grounded through the capacitor C4, the 6 pin and the 7 pin of the U2 chip are short-circuited at the other end and connected with the positive electrode VCC of the power supply through the adjustable resistor RP, the 8 pin of the U2 chip is connected with the positive electrode VCC of the power supply, the 4 pin of the U2 chip is grounded through the capacitor C3, the 5 pin of the U2 chip is grounded through the capacitor C1, the 8 pin of the U2 chip is grounded through the capacitor C2, and the 3 pin of the U2 chip is connected with the input end of the access control controller.

[0010] Further, the resistor R5 is further arranged between the adjustable resistor RP and the positive electrode VCC of the power supply, the resistor R5 and the resistor RP are connected in series and then connected to the 6 pin and the 7 pin of the U2 chip and connected with the capacitor C4 to form an RC timing circuit, thereby playing a delay role.

[0011] In some embodiments, the resistor R1 is further arranged between the output end of the human body infrared induction circuit and the base of the Q1 triode, the resistor R1 provides current limitation for the base of the Q1 triode, thereby protecting the Q1 triode; the resistor R2 is further arranged between the light emitting tube of the U1 photoelectric coupler and the positive electrode VCC of the power supply, the resistor R2 provides a bias current for the light emitting tube end of the U1 photoelectric coupler; the resistor R3 is further arranged between the output end collector of the U1 photoelectric coupler and the 2 pin of the U2 chip, the resistor R3 provides a pull-down resistor for the triggering 2 pin of the U2 chip.

[0012] In some embodiments, the human body infrared induction circuit comprises an infrared induction probe, an amplifier and a comparator, the output end of the infrared induction probe is connected with the input end of the amplifier, the output end of the amplifier is connected with the input end of the comparator, and the output end of the comparator is connected with the input end of the level conversion delay control circuit.

[0013] Further, the shaping filter circuit is further arranged between the output end of the amplifier and the input end of the comparator, and is used for shaping and filtering the output signal.

[0014] In some embodiments, the amplifier is an LM324 amplifier.

[0015] In some embodiments, the U2 chip is a 555 time base chip.

[0016] In some embodiments, a control system comprises a human body infrared induction module, a level conversion delay control module, an access controller, and an ACDC converter, wherein the output end of the human body infrared induction module is connected to the input end of the level conversion delay control module, the human body infrared induction module is used for sensing human body infrared emission and transmitting signals to the level conversion delay control module, the output end of the level conversion delay control module is connected to the input end of the access controller, the level conversion delay control module is used for converting analog signals into digital signals and triggering a delay, the ACDC converter is electrically connected to the access controller, and the ACDC converter is used for providing power supply for the access controller.

[0017] The human body infrared induction access control circuit and system have the advantages that the output end of the human body infrared induction module is connected to the input end of the level conversion delay control module, the human body infrared induction module is used for sensing human body infrared emission and transmitting signals to the level conversion delay control module, the output end of the level conversion delay control module is connected to the input end of the access controller, the access controller can automatically open the door when a person is 3-5 meters away from the door, the convenience of the access control is improved, the existing mechanical type press switch is replaced, the installation cost is reduced, the level conversion delay control module provides a time for personnel safety access after the door is opened, and the door is relocked after the time ends. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The circuit schematic diagram of the level conversion delay control circuit of the present application is shown.

[0019] Figure 2 The structural schematic diagram of the human body infrared induction access control system of the present application is shown.

[0020] The following specific embodiments will further illustrate the present application in combination with the above drawings. DETAILED DESCRIPTION

[0021] The following embodiments are described to assist in the understanding of the present application, the embodiments are not and should not be interpreted as limiting the protection scope of the present application in any way.

[0022] In the following description, those skilled in the art will recognize that components can be described as separate functional units (which can include sub-units), but those skilled in the art will recognize that various components or portions thereof can be divided into separate components, or can be integrated together (including integrated within a single system or component).

[0023] Meanwhile, a connection between components or systems is not intended to be limited to direct connections, and rather, data between these components can be modified, reformatted, or otherwise changed by intermediate components. Also, additional or fewer connections can be used. It should also be noted that the terms "coupled", "connected", or "input" should be understood in the context of this document to mean directly connected, indirectly connected through one or more intermediate devices, and / or wireless connections. Example 1:

[0024] The human body infrared induction access control circuit, comprising a human body infrared induction circuit, a level conversion delay control circuit, an access controller, and an ACDC converter, wherein the output end of the human body infrared induction circuit is connected with the input end of the level conversion delay control circuit, the human body infrared induction circuit is used for sensing human body infrared emission and transmitting an analog signal to the level conversion delay control circuit, the output end of the level conversion delay control circuit is connected with the input end of the access controller, the level conversion delay control circuit is used for converting the analog signal into a digital signal and triggering a delay, the ACDC converter is electrically connected with the access controller, and the ACDC converter is used for providing power supply for the access controller.

[0025] As shown in Figure 2 The level conversion delay control circuit comprises a Q1 triode, a U1 photoelectric coupler, a U2 chip, an R4 resistor, an adjustable resistor RP, a C4 capacitor, a capacitor C1, a capacitor C2, and a capacitor C3. The output end of the human body infrared induction circuit is connected with the base of the Q1 triode, the emitter of the Q1 triode is grounded, the collector of the Q1 triode is connected with the negative electrode of the light-emitting tube of the U1 photoelectric coupler, the light-emitting tube of the U1 photoelectric coupler is connected with the positive electrode VCC of the power supply, the output end collector of the U1 photoelectric coupler is connected with the 2-pin of the U2 chip, the output end emitter of the U1 photoelectric coupler is grounded, the 2-pin of the U2 chip is connected with the positive electrode VCC of the power supply through the resistor R4, the 6-pin and the 7-pin of the U2 chip are short-circuited at one end and grounded through the capacitor C4, the 6-pin and the 7-pin of the U2 chip are short-circuited at the other end and connected with the positive electrode VCC of the power supply through the adjustable resistor RP, the 8-pin of the U2 chip is connected with the positive electrode VCC of the power supply, the 4-pin of the U2 chip is grounded through the capacitor C3, the 5-pin of the U2 chip is grounded through the capacitor C1, the 8-pin of the U2 chip is grounded through the capacitor C2, and the 3-pin of the U2 chip is connected with the input end of the access controller.

[0026] Specifically, the signal output by the human body infrared induction circuit makes the Q1 triode saturated and conductive, the U1 photoelectric coupler LED emits light, the output end of the U1 photoelectric coupler pulls the voltage at the 2-pin of the U2 chip to 1 / 3 VCC, and then the 3-pin of the U2 chip outputs an opening signal (high level), the opening signal (high level) triggers the access control controller to open the electromagnetic lock and open the door, at the same time that the 3-pin of the U2 chip outputs the opening signal (high level), the internal discharge Q1 triode of the 7-pin of the U2 chip is cut off, and the capacitor C4 starts to charge through the resistor R5 and the adjustable resistor RP, when the capacitor C4 is charged to 2 / 3 VCC, the 3-pin of the U2 chip flips to low level, the delay time = 1.1*(resistor R5+adjustable resistor RP)*capacitor C4, and the access control controller receives the low level to control the electromagnetic lock to close.

[0027] The resistor R5 is further arranged between the adjustable resistor RP and the positive electrode VCC of the power supply, the resistor R5 and the resistor RP are connected in series to the 6-pin and the 7-pin of the U2 chip, and the capacitor C4 is connected to form an RC timing circuit, thereby playing a delay role.

[0028] The resistor R1 is further arranged between the output end of the human body infrared induction circuit and the base of the Q1 triode, the resistor R1 provides current limitation for the base of the Q1 triode, thereby protecting the Q1 triode; the resistor R2 is further arranged between the light emitting tube of the U1 photoelectric coupler and the positive electrode VCC of the power supply, the resistor R2 provides a bias current for the light emitting tube end of the U1 photoelectric coupler; and the resistor R3 is further arranged between the output end collector of the U1 photoelectric coupler and the 2-pin of the U2 chip, the resistor R3 provides a pull-down resistor for the trigger 2-pin of the U2 chip.

[0029] The human body infrared induction circuit comprises an infrared induction probe, an amplifier and a comparator, the output end of the infrared induction probe is connected with the input end of the amplifier, the output end of the amplifier is connected with the input end of the comparator, and the output end of the comparator is connected with the input end of the level conversion delay control circuit.

[0030] The shaping filter circuit is further arranged between the output end of the amplifier and the input end of the comparator, and is used for shaping and filtering the output signal.

[0031] The amplifier is an LM324 amplifier, and the U2 chip is a 555 time base chip.

[0032] As Figure 1The body infrared induction access control system is characterized in that: the output end of the body infrared induction module is connected with the input end of the level conversion delay control module, the body infrared induction module is used for inducting infrared emission of a human body and transmitting a signal to the level conversion delay control module, the output end of the level conversion delay control module is connected with the input end of the access controller, the level conversion delay control module is used for converting an analog signal into a digital signal and triggering a delay, the ACDC converter is electrically connected with the access controller, and the ACDC converter is used for providing power supply for the access controller.

[0033] Specifically, the body infrared induction module is connected with the level conversion delay control module, the level conversion delay control module is connected with the access controller, and the access controller is connected with the ACDC converter. When a person is in the sensing area, the body infrared induction module senses the person and outputs a high level, the high level triggers the level conversion delay control module, the level conversion delay control module outputs an opening signal, the access controller is triggered to open the electromagnetic lock and open the door, and the electromagnetic door is automatically opened.

[0034] Although the present application has disclosed multiple aspects and embodiments, other aspects and embodiments will be apparent to those skilled in the art, and several modifications and improvements can be made without departing from the concept of the present application, which all belong to the protection scope of the present application. The multiple aspects and embodiments disclosed by the present application are only used for illustration, and are not intended to limit the present application, and the actual protection scope of the present application is subject to the claims.

Claims

1. A human infrared sensor access control circuit, comprising a human infrared sensor circuit, a level conversion delay control circuit, an access controller, and an ACDC converter, characterized in that: The output terminal of the human infrared sensing circuit is connected to the input terminal of the level conversion delay control circuit. The human infrared sensing circuit is used to detect the infrared emission of the human body and transmit the analog signal to the level conversion delay control circuit. The output terminal of the level conversion delay control circuit is connected to the input terminal of the access controller. The level conversion delay control circuit is used to convert the analog signal into a digital signal and trigger the delay. The ACDC converter is electrically connected to the access controller and is used to provide power to the access controller.

2. The human body infrared sensor access control circuit as described in claim 1, characterized in that: The level conversion delay control circuit includes a transistor Q1, an optocoupler U1, a chip U2, a resistor R4, an adjustable resistor RP, a capacitor C4, capacitors C1, C2, and C3. The output terminal of the human infrared sensing circuit is connected to the base of transistor Q1, the emitter of transistor Q1 is grounded, the collector of transistor Q1 is connected to the negative terminal of the LED of optocoupler U1, the LED of optocoupler U1 is connected to the positive power supply VCC, the collector of the output terminal of optocoupler U1 is connected to pin 2 of chip U2, the emitter of the output terminal of optocoupler U1 is grounded, pin 2 of chip U2 is connected to the positive power supply VCC through resistor R4, pins 6 and 7 of chip U2 are shorted at one end and grounded through capacitor C4, pins 6 and 7 of chip U2 are shorted at the other end and connected to the positive power supply VCC through adjustable resistor RP, and pin 8 of chip U2 is connected to the positive power supply VCC. Pin 4 of the U2 chip is grounded through capacitor C3, pin 5 of the U2 chip is grounded through capacitor C1, pin 8 of the U2 chip is grounded through capacitor C2, and pin 3 of the U2 chip is connected to the input terminal of the access control controller.

3. The human body infrared sensor access control circuit as described in claim 2, characterized in that: A resistor R5 is also provided between the adjustable resistor RP and the positive power supply VCC. The resistor R5 and the resistor RP are connected in series to pins 6 and 7 of the U2 chip, and are connected to capacitor C4 to form an RC timing circuit, which plays a delay role.

4. The human body infrared sensor access control circuit as described in claim 2, characterized in that: A resistor R1 is provided between the output terminal of the human infrared sensing circuit and the base of transistor Q1. Resistor R1 provides current limitation for the base of transistor Q1, thus protecting transistor Q1. A resistor R2 is provided between the LED of optocoupler U1 and the positive power supply VCC. Resistor R2 provides bias current for the LED of optocoupler U1. A resistor R3 is provided between the collector of the output terminal of optocoupler U1 and pin 2 of chip U2. Resistor R3 provides pull-down resistance for the trigger pin 2 of chip U2.

5. The human body infrared sensor access control circuit as described in claim 1, characterized in that: The human infrared sensing circuit includes an infrared sensing probe, an amplifier, and a comparator. The output terminal of the infrared sensing probe is connected to the input terminal of the amplifier, the output terminal of the amplifier is connected to the input terminal of the comparator, and the output terminal of the comparator is connected to the input terminal of the level conversion delay control circuit.

6. The human body infrared sensor access control circuit as described in claim 5, characterized in that: A shaping and filtering circuit is also provided between the amplifier output terminal and the comparator input terminal to shape and filter the output signal.

7. The human body infrared sensor access control circuit as described in claim 5, characterized in that: The amplifier is an LM324 amplifier.

8. The human body infrared sensing access control circuit as described in claim 2, characterized in that: The U2 chip is a 555 timer chip.

9. A control system, characterized in that, The human infrared sensing access control circuit according to any one of claims 1 to 8 includes a human infrared sensing module, a level conversion delay control module, an access controller, and an ACDC converter. The circuit is characterized in that: the output terminal of the human infrared sensing module is connected to the input terminal of the level conversion delay control module; the human infrared sensing module is used to sense and emit infrared signals from a human body and transmit the signals to the level conversion delay control module; the output terminal of the level conversion delay control module is connected to the input terminal of the access controller; the level conversion delay control module is used to convert analog signals into digital signals and trigger a delay; and the ACDC converter is electrically connected to the access controller, providing power to the access controller.

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