CN210836285U

CN210836285U - Intelligent access control system

Info

Publication number: CN210836285U
Application number: CN201922275004.1U
Authority: CN
Inventors: 朱江红
Original assignee: Shenzhen Nord Electronic Technology Co ltd
Current assignee: Shenzhen Nord Electronic Technology Co ltd
Priority date: 2019-12-18
Filing date: 2019-12-18
Publication date: 2020-06-23
Anticipated expiration: 2029-12-18

Abstract

The utility model discloses an intelligent access control system, including microprocessor, communication interface, display screen interface, the treater respectively with communication interface, display screen interface electricity be connected, communication interface includes 2.4G 5 GWIFISI standard interface, still includes treater management circuit, treater management circuit includes watchdog timer, power monitoring reset circuit and comparator, MOSFET pipe Q1, MOSFET pipe Q2 and MOSFET pipe Q3, external power source is connected to power monitoring reset circuit's input, watchdog timer is connected to power monitoring reset circuit's output, the WDO pin of watchdog timer passes through R2 and is connected with MOSFET pipe Q1's grid, MOSFET pipe Q1's source electrode is connected with power detection module. The utility model discloses utilize integrated chip to realize control supply voltage time delay output, reduced whole power supply sequential control circuit failure rate to realize that the low-voltage resets.

Description

Intelligent access control system

Technical Field

The utility model belongs to the technical field of access control, concretely relates to intelligent access control system.

Background

The entrance guard safety management system is a modern safety management system, it integrates microcomputer automatic identification technology and modern safety management measures into one body, it relates to many new technologies of electronics, machinery, optics, computer technology, communication technology and biological technology. The method is an effective measure for realizing safety precaution management at the entrance and exit of important departments. The system is suitable for various essential departments, such as banks, hotels, parking lot management, machine rooms, ordnance depots, key rooms, office rooms, intelligent districts, factories and the like. The gating circuit board in the traditional technology has single function and low intelligent degree, and can not meet the requirements of customers.

In addition, the power supply voltage can only be controlled all the way that current entrance guard's device adopted to there is the rise time problem of voltage, makes the unable accurate realization of control, and the drive circuit of most entrance guards mainly adopts signal and power supply separation simultaneously, like the integrated drive circuit of each big brand, causes overall circuit complicacy, and the failure rate is high.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that to prior art not enough, provide intelligent access control circuit board.

The utility model provides a technical scheme that its technical problem adopted is:

an intelligent access control system comprises a microprocessor, a communication interface and a display screen interface, wherein the processor is respectively electrically connected with the communication interface and the display screen interface, the communication interface comprises a 2.4G/5 GWIFII standard interface, the intelligent access control system is characterized by also comprising a processor management circuit, the processor management circuit comprises a watchdog timer, a power monitoring reset circuit and a comparator, a MOSFET Q1, a MOSFET Q2 and a MOSFET Q3, the input end of the power monitoring reset circuit is connected with an external power supply, the output end of the power monitoring reset circuit is connected with the watchdog timer, a WDO pin of the watchdog timer is connected with a grid of the MOSFET Q1 through R2, the source of the MOSFET Q1 is connected with a power detection module, the drain of the MOSFET Q1 is connected with a PFI pin of the comparator and then grounded through a resistor R1, two ends of the resistor R1 are provided with a capacitor C1, the source of the MOSFET Q1 is grounded through a resistor R5, the PFI pin of the comparator is connected with the grid electrode of a MOSFET tube Q2 through a resistor R3, the drain electrode of the MOSFET tube Q2 is connected with the reset input end of the microprocessor, and the source electrode of the MOSFET tube Q2 is grounded and is connected with the grid electrode of the MOSFET tube Q2 through a resistor R4; the PFO pin of the comparator is connected with the grid electrode of a MOSFET tube Q3 through a resistor R6, the drain electrode of the MOSFET tube Q3 is connected with the MR pin of the power detection module, and the source electrode of the MOSFET tube Q3 is grounded.

Furthermore, the display screen is connected with an integrated RGB interface LCD display screen.

Further, the communication interface also comprises an RJ45 interface, an RS458 interface, a USB interface and a TP interface.

The device further comprises a USB interface connected with the 1200-pixel camera, a single-channel output audio output port and a microphone interface, wherein the single-channel output audio output port and the microphone interface are at least electrically connected with the microprocessor.

Further, the PCBA board where the microprocessor is located is integrated with a reset button, and the reset button is electrically connected with the microprocessor.

Further, the PCBA board where the processor is located is provided with an infrared sensor, a distance sensor and an infrared sensor, and the infrared sensor, the distance sensor and the infrared sensor are all electrically connected with the microprocessor.

Furthermore, the microprocessor is also connected with a DDR3 internal memory and an emmc8g memory.

The utility model has the advantages that:

1. the utility model discloses through the treater management circuit, adopt the correct power-up order of two aspects dual assurance circuits in chronogenesis and logic, guarantee circuit device safety. The device has the functions of storage, clock display, watchdog reset and the like; the delay output of the power supply voltage is controlled by using an integrated chip, and the voltage control is accurate; compared with discrete components, the power supply time sequence control circuit greatly reduces the failure rate of the whole power supply time sequence control circuit, realizes the low-voltage reset function, can effectively simplify the control circuit, is simple to debug, reduces the hardware cost, simplifies the software design and saves the resources to the maximum extent.

2. The utility model discloses the integrated circuit board supports WIFI/bluetooth (can support 2.4G/5 GWIFII) and RJ45 in an organic whole, supports the decoding of current popular video and picture format; integrating an RGB interface LCD screen; rich extended interfaces. High definition: the system upgrading can be realized conveniently and quickly by a USB interface; the universal external device is supported, the interfaces are rich, and the performance is stable. The utility model discloses the function is various. The utility model discloses intelligent degree is high, can satisfy the diversified demand of customer.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a connection block diagram of the present invention.

Fig. 2 is a circuit diagram of a part of the management circuit of the processor of the present invention.

Detailed Description

The technical solution of the present invention is described in detail with reference to the following specific embodiments, but the present invention is not limited thereto.

As shown in fig. 1-2, this embodiment provides an intelligent door control system, which includes a microprocessor, a communication interface, and a display interface, wherein the processor is electrically connected to the communication interface and the display interface, the communication interface includes a 2.4G/5 gwififi standard interface, and the intelligent door control system is characterized in that the intelligent door control system further includes a processor management circuit, the processor management circuit includes a watchdog timer, a power monitoring reset circuit and a comparator, a MOSFET Q1, a MOSFET Q2, and a MOSFET Q3, an input end of the power monitoring reset circuit is connected to an external power supply, an output end of the power monitoring reset circuit is connected to the watchdog timer, a WDO pin of the watchdog timer is connected to a gate of the MOSFET Q1 through R2, a source of the MOSFET Q1 is connected to the power detection module, a drain of the MOSFET Q1 is connected to a PFI pin of the comparator and then grounded through a resistor R1, two ends of the resistor R1 are connected to a capacitor C1, the source electrode of the MOSFET Q1 is grounded through a resistor R5, the PFI pin of the comparator is connected with the grid electrode of the MOSFET Q2 through a resistor R3, the drain electrode of the MOSFET Q2 is connected with the reset input end of the microprocessor, and the source electrode of the MOSFET Q2 is grounded and connected with the grid electrode of the MOSFET Q2 through a resistor R4; the PFO pin of the comparator is connected with the grid electrode of a MOSFET tube Q3 through a resistor R6, the drain electrode of the MOSFET tube Q3 is connected with the MR pin of the power detection module, and the source electrode of the MOSFET tube Q3 is grounded.

The display screen is connected with an integrated RGB interface LCD display screen; the communication interface comprises an RJ45 interface, an RS458 interface, a USB interface and a TP interface. Various interfaces can facilitate communication with the processor input or output, and the functions of the utility model are expanded.

The utility model discloses still including the USB interface of connecting 1200 pixel cameras, audio output mouth, the microphone interface of single sound track output at least with microprocessor electricity be connected. Realized through this circuit the utility model discloses audio frequency and video processing support pronunciation or image function to realize.

In this embodiment, a watchdog timer, a power monitoring reset circuit, and a comparator of a processor management circuit are integrated into an integrated circuit, typically, the integrated circuit includes a MAX706 (for a 3.3V system) or a MAX705 (for a 5V system), in this embodiment, a MAX706 chip is used, a pin of the MAX706 chip is used as an input terminal of a circuit included in the chip, a WDI terminal of the MAX706 chip is an input terminal of the watchdog timer and is connected to a general IO pin of a microprocessor, the IO pin outputs a pulse type watchdog feeding signal, clearing of the watchdog timer is realized by using a rising edge and a falling edge of the signal, a WDO terminal of the MAX706 chip is an output terminal of the watchdog timer, the WDO terminal outputs a high level after the watchdog timer is started, and maintains the high level during timing, when the watchdog timer outputs a low level, and keep the low level, until being cleared, after the said watchdog timer is cleared, WDO end resumes to keep the high level, utilize the integrated chip to realize the output of control power supply voltage delay, compared with discrete component greatly reduced the whole power supply sequential control circuit failure rate, and realize the low-voltage reset function. The models of the field-effect tube Q1, the field-effect tube Q2 and the field-effect tube Q3 are all SI4800 DY.

Microprocessor place PCBA board on set up infrared sensor, distance sensor and infrared sensor, distance sensor, infrared sensor all be connected with the microprocessor electricity. Through the regulation of microprocessor and treater management circuit, infrared sensor and infrared sensor control the luminance of load on the display screen interface jointly for camera and display screen are in standby state under the condition of not using, have both reduced the electric quantity and have used, have reduced the storage demand again.

The utility model integrates a reset button on the PCBA board where the microprocessor is located, and the reset button is electrically connected with the processor; the PCBA board where the processor is arranged is provided with the power supply management circuit, and the power supply management circuit supports 18V-32V direct-current voltage input; the processor is also connected with a DDR3 internal memory and an emmc8g memory; the processor is also connected with the io port to control the power supply.

The following are some interface parameters of the utility model:

◆ power input interface

Serial number	Definition of	Properties	Description of the invention
				1	DCIN	Input Voltage	24V input 3.5mm pitch,45 °
2	GND	Ground wire	Ground wire

·Connector J3(15EDGLC-3.5-04P-1Y)

Serial number	Definition of	Properties	Description of the invention
				1	1–RS485 A	Input/output
2	2–RS485 B	Input/output
				3	3–GND	GNG

·Connector J5(15EDGLC-3.5-04P-1Y)

Serial number	Definition of	Properties	Description of the invention
				1	1–DIN	Input device
2	Input Voltage	Voltage input
				3	DOUTA	Input/output
4	DOUTB	Input/output

·Connector U8(2-pin XH2.54)

Serial number	Definition of	Properties	Description of the invention
				1	L+	connector for speaker+
2	L-		connector for speaker_

·Connector U12(6-pin XH2.54)

Serial number	Definition of	Properties	Description of the invention
				1	VCC_IR	Power supply
2	GND	Ground connection
				3	HOST_5V	Power supply
4	D-	Data of
				5	D+	Data of
6	GND	Ground connection

Touch screen interface (PH mother seat, 1X 6pin, 2.0mm)

The following are some electrical parameters of the utility model:

in specific implementation, the PCBA where the microprocessor is located belongs to a customized design, common external equipment is supported, the interfaces are rich, and the performance is stable. The board card supports WIFI/Bluetooth (capable of supporting 2.4G/5 GWIFII) and RJ45 into a whole, and supports decoding of currently popular video and picture formats; integrated RGB interface 4.3 "LCD screen, resolution 480 x 800. 4.3 inches TP interface; rich extended interfaces: 1 USB2.0 interface, 1 RJ45 interface, 1 RS485 interface, 1 afterelectrical control mouth. 1 USB camera interface. High definition: and 4K hard decoding playing is supported, and horizontal and vertical screen playing is supported. Various play modes such as circulation, timing, inter cut and the like are supported; the decoding resolution ratio supports 1080P, 4K and H.265 hard decoding, the video playing supports formats such as wmv, avi, flv, rm, rmvb, mpeg, ts, mp4 and the like, the operating system is Android 7.1.1, the network supports WiFi and wired networks, and the network supports BT 4.0; the picture format supports BMP, JPEG, PNG, GIF and the like; the RTC interface is set to support a real-time clock, the real-time clock is effective within 2 years, and system upgrading can be realized by a USB interface.

It will be appreciated by those skilled in the art that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are illustrative and not exclusive in all respects. All changes which come within the scope of the invention or which are equivalent to the scope of the invention are embraced by the invention.

Claims

1. An intelligent access control system comprises a microprocessor, a communication interface and a display screen interface, wherein the processor is respectively electrically connected with the communication interface and the display screen interface, the communication interface comprises a 2.4G/5 GWIFII standard interface, the intelligent access control system is characterized by also comprising a processor management circuit, the processor management circuit comprises a watchdog timer, a power monitoring reset circuit and a comparator, a MOSFET Q1, a MOSFET Q2 and a MOSFET Q3, the input end of the power monitoring reset circuit is connected with an external power supply, the output end of the power monitoring reset circuit is connected with the watchdog timer, a WDO pin of the watchdog timer is connected with a grid of the MOSFET Q1 through R2, the source of the MOSFET Q1 is connected with a power detection module, the drain of the MOSFET Q1 is connected with a PFI pin of the comparator and then grounded through a resistor R1, two ends of the resistor R1 are provided with a capacitor C1, the source of the MOSFET Q1 is grounded through a resistor R5, the PFI pin of the comparator is connected with the grid electrode of a MOSFET tube Q2 through a resistor R3, the drain electrode of the MOSFET tube Q2 is connected with the reset input end of the microprocessor, and the source electrode of the MOSFET tube Q2 is grounded and is connected with the grid electrode of the MOSFET tube Q2 through a resistor R4; the PFO pin of the comparator is connected with the grid electrode of a MOSFET tube Q3 through a resistor R6, the drain electrode of the MOSFET tube Q3 is connected with the MR pin of the power detection module, and the source electrode of the MOSFET tube Q3 is grounded.

2. The intelligent access control system of claim 1, wherein the display screen interface is connected with an LCD display screen integrated with RGB interface.

3. The intelligent access control system of claim 1, wherein the communication interface comprises an RJ45 interface, an RS458 interface, a USB interface, and a TP interface, all connected to the microprocessor.

4. The intelligent access control system of claim 1, further comprising a USB interface for connecting to a 1200-pixel camera, a mono output audio output port, and a microphone interface, wherein the mono output audio output port and the microphone interface are at least electrically connected to the microprocessor.

5. The intelligent access control system of claim 1, wherein the PCBA board on which the microprocessor resides integrates a reset button, and the reset button is electrically connected to the microprocessor.

6. The intelligent access control system of claim 1, wherein the PCBA board on which the processor is located is provided with an infrared sensor, a distance sensor and an infrared sensor, and the infrared sensor, the distance sensor and the infrared sensor are all electrically connected with the microprocessor.

7. The intelligent access control system of claim 1, wherein the microprocessor is further connected with a DDR3 memory and an emmc8g memory.