CN219107675U

CN219107675U - POE power supply isolated portable wireless gateway

Info

Publication number: CN219107675U
Application number: CN202222570092.XU
Authority: CN
Inventors: 李勇; 古皓文; 罗亮
Original assignee: Chengdu Ebyte Electronic Technology Co ltd
Current assignee: Chengdu Ebyte Electronic Technology Co ltd
Priority date: 2022-09-27
Filing date: 2022-09-27
Publication date: 2023-05-30
Anticipated expiration: 2032-09-27

Abstract

The utility model relates to the technical field of wireless gateways, in particular to a POE power supply isolated portable wireless gateway, which comprises: the power supply, POE power supply, LDO, MCU, zigbee module, WIFI module, PCB antenna, SMA antenna, ethernet chip, RJ45 and transformer; the power is connected with the LDO, and the LDO is connected with MCU, zigbee module, WIFI module respectively, and MCU, zigbee module, WIFI module connect gradually, and Zigbee module is connected with the SMA antenna, and the WIFI module is connected with the PCB antenna, and MCU, ethernet chip, RJ45, transformer, POE power, power connect gradually.

Description

POE power supply isolated portable wireless gateway

Technical Field

The utility model relates to the technical field of wireless gateways, in particular to a POE power supply isolated portable wireless gateway.

Background

In recent years, with the continuous development of wireless communication technology, demands of the domestic internet of things and smart home are increased, and the usage amount of the wireless gateway is greatly increased. The existing wireless gateway has the following defects: 1. the power adapter must be relied on to supply power, the power adapter cannot be used under the condition that a commercial power socket cannot be provided and under the condition that power is cut off, wiring and socket addition can influence the attractiveness and the limitation of use, a power isolation circuit is not arranged in the power adapter, the stability of the whole machine is directly determined by the external adapter, and if the external adapter is unstable in power supply, the stability of equipment is directly influenced; 2. because the existing market generally uses 12V power supply, the internal LDO is converted into 3.3V to generate a large voltage drop, so that the problem of serious heating caused by overall efficiency reduction occurs. Based on the above, we have designed a POE powered isolated portable wireless gateway for overcoming the above technical problems.

Disclosure of Invention

The utility model aims to provide an isolated portable wireless gateway powered by POE, which is used for supplying power to related components by adopting a low-dropout linear voltage stabilizer, so that the problems of heating and energy loss caused by voltage drop are greatly reduced, and an external power adapter is not needed by a POE network cable power supply technology, so that the problem that the decoy POE power supply cannot be started at a later stage with lower power consumption and stability is solved.

The embodiment of the utility model is realized by the following technical scheme:

a POE powered isolated portable wireless gateway, comprising: the power supply, POE power supply, LDO, MCU, zigbee module, WIFI module, PCB antenna, SMA antenna, ethernet chip, RJ45 and transformer; the power is connected with the LDO, and the LDO is connected with MCU, zigbee module, WIFI module respectively, and MCU, zigbee module, WIFI module connect gradually, and Zigbee module is connected with the SMA antenna, and the WIFI module is connected with the PCB antenna, and MCU, ethernet chip, RJ45, transformer, POE power, power connect gradually.

Optionally, the LED and sensor module is further included; the LED and the sensor module are connected with the MCU through the IO port.

Optionally, the connection relationship between the MCU and the Zigbee module, the connection relationship between the MCU and the WIFI module, and the connection relationship between the MCU and the ethernet chip are all connected through a universal asynchronous receiver/transmitter UART.

Optionally, the universal asynchronous receiver/transmitter UART between the MCU and the WIFI module is connected with the Type-C through a serial port chip, and the Type-C is connected with a power supply.

Optionally, the serial port chip is a CH9102 serial port chip.

Optionally, the power supply specifically selects a 5V power supply.

Optionally, the LDO specifically selects 3.3VLDO.

The technical scheme of the embodiment of the utility model has at least the following advantages and beneficial effects:

in the embodiment, the POE network cable power supply technology is used, an external power adapter is not needed, and POE power supply is used for solving the problem that decoy POE power supply cannot be started at a later stage when the power consumption is low; the primary side feedback flyback isolation power supply is adopted, a post-stage feedback circuit is not needed, the research and development cost is greatly reduced, the isolation degree of a power supply part is increased, the EP13 type high-frequency transformer is used for carrying out the front-stage and back-stage isolation of the power supply, the chip can output PWM control signals up to 250K, the volume of the transformer is greatly reduced, and the conversion efficiency of the power supply is also increased; the embodiment adopts the ultralow-power-consumption low-dropout linear voltage regulator to supply power for related components, and the static current is lower than 1uA, so that compared with the traditional linear voltage regulator, the heating and energy loss caused by voltage drop are greatly reduced.

Drawings

Fig. 1 is a schematic block diagram of an isolated portable wireless gateway powered by POE according to the present utility model;

fig. 2 is a schematic diagram of a working circuit of a WIFI module and a Zigbee module provided by the present utility model.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

As shown in fig. 1, the present utility model provides one of the embodiments: a POE powered isolated portable wireless gateway, comprising: the power supply, POE power supply, low dropout linear regulator LDO, micro control unit MCU, zigbee module, WIFI module, PCB antenna, SMA antenna, ethernet chip, RJ45, transformer; the power is connected with the LDO, and the LDO is connected with MCU, zigbee module, WIFI module respectively, and MCU, zigbee module, WIFI module connect gradually, and Zigbee module is connected with the SMA antenna, and the WIFI module is connected with the PCB antenna, and MCU, ethernet chip, RJ45, transformer, POE power, power connect gradually.

In the specific application of the embodiment, the POE network cable power supply technology can be used, an external power adapter is not needed, the embodiment uses a high-performance IEEE802.3af protocol POE power supply IC, and the embodiment is different from a MOS tube decoy POE protocol, so that the problem that decoy POE power supply cannot be started at a later stage with lower power consumption is solved; the primary side feedback flyback isolation power supply is adopted, a post-stage feedback circuit is not needed, the research and development cost is greatly reduced, the isolation degree of a power supply part is increased, the EP13 type high-frequency transformer is used for carrying out the front-stage and back-stage isolation of the power supply, the chip can output PWM control signals up to 250K, the volume of the transformer is greatly reduced, and the conversion efficiency of the power supply is also increased; in the embodiment, a Type-C interface is added, a serial port-to-USB chip is added, and in an outdoor environment, power can be supplied to equipment through a computer USB interface and interacted with the equipment, so that the functions of control, detection and communication are realized, and the maximized portability is realized; according to the embodiment, the problem that equipment is damaged due to the fact that Type-C and POE are simultaneously powered is solved, the fact that POE and Type-C are simultaneously powered is considered in a use environment, and the fact that the POE power supply reversely irrigates the Type-C interface to damage peripheral equipment is considered, and a reversely irrigated circuit is added on hardware to overcome the problem; in the embodiment, the Type-C interface is added, and meanwhile, an electronic switching device is integrated inside, so that the Type-C can be controlled to be interacted with the Zigbee module or the WIFI module independently through the electronic switch, and the WIFI module can be controlled to be used as the wireless local area network AP independently; the embodiment adopts the ultralow-power-consumption low-dropout linear voltage regulator to supply power for related components, and the static current is lower than 1uA, so that compared with the traditional linear voltage regulator, the heating and energy loss caused by voltage drop are greatly reduced.

In this embodiment, the device further comprises an LED and sensor module; the LED and the sensor module are connected with the MCU through the IO port.

In the specific application of the embodiment, the embodiment adopts a POE and Type-C dual power supply scheme, and the two circuits can independently run or can be used simultaneously, so that the two circuits can work normally. For the power supply part of the POE power supply, 37V-57V power supply voltage of IEEE802.3af standard is input through an RJ45 Ethernet interface, filtering treatment is carried out after rectification by a rectifier bridge to reach a power supply chip of the POE power supply, the chip comprises a POE protocol part and a flyback power supply control part, the chip can output PWM control pulse of 250Khz at most, the size of a transformer is greatly reduced, the MOS tube is used for controlling the input DC voltage and converting the input DC voltage into high-frequency pulse, the primary side feedback circuit is used for controlling PWM output duty ratio, so that the output voltage of the transformer is regulated, the output voltage is rectified by a diode, the output voltage is filtered by a capacitor inductance and then is output to be connected with the 5V voltage after being processed by an anti-backflow circuit, the effect of double power supply is achieved, and the input 5V voltage is supplied to a post-stage circuit after being processed by a low-voltage-difference linear voltage stabilizer.

In this embodiment, the connection relationship between the MCU and the Zigbee module, the connection relationship between the MCU and the WIFI module, and the connection relationship between the MCU and the ethernet chip are all connected through a universal asynchronous receiver/transmitter UART.

In the specific application of this embodiment, the WIFI module and the Zigbee module communicate with the MCU through serial ports 1 and 2, the Zigbee module and the WIFI module integrate the LNA, PA and radio frequency switch inside, and are connected to the antenna through the balun circuit, the matching circuit and the filter circuit, and the radio frequency signals amplified by the PA can generate 20dBm of radio frequency power, so that the radio frequency transmission distance is greatly increased, the WIFI module and the Zigbee module are both 2.4G frequency bands, and in order to prevent interference, the two parts use the shielding cover independently to perform signal shielding. The WIFI module and the Zigbee module are mutually communicated after being processed by the MCU, the WIFI module and the Zigbee module are connected with the Ethernet chip through the serial port 3, and the Ethernet chip is communicated with the external Ethernet through the network transformer and the RJ45 network port, so that the mutual communication among Zigbee, WIFI, USB signals, serial port signals and Ethernet signals is realized.

In this embodiment, still include Type-C, universal asynchronous receiver/transmitter UART between MCU and the WIFI module is connected with Type-C through serial ports chip, and Type-C is connected with the power.

In this embodiment, the serial port chip is a CH9102 serial port chip.

In a specific application of the embodiment, the serial port chip converts serial port signals into USB signals, and the serial port signals can be communicated with the device through a computer USB interface, so that a time sequence control circuit is integrated inside to control the burning time sequence of the internal MCU.

In this embodiment, the power supply specifically selects a 5V power supply.

In this embodiment, the LDO is specifically 3.3VLDO.

The above is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A POE powered isolated portable wireless gateway, comprising: the power supply, POE power supply, LDO, MCU, zigbee module, WIFI module, PCB antenna, SMA antenna, ethernet chip, RJ45 and transformer; the power is connected with the LDO, and the LDO is connected with MCU, zigbee module, WIFI module respectively, and MCU, zigbee module, WIFI module connect gradually, and Zigbee module is connected with the SMA antenna, and the WIFI module is connected with the PCB antenna, and MCU, ethernet chip, RJ45, transformer, POE power, power connect gradually.

2. The POE powered isolated portable wireless gateway of claim 1, further comprising an LED and sensor module; the LED and the sensor module are connected with the MCU through the IO port.

3. The POE powered isolated portable wireless gateway of claim 1, wherein the connection between the MCU and the Zigbee module, the connection between the MCU and the WIFI module, and the connection between the MCU and the ethernet chip are all connected through a universal asynchronous receiver/transmitter UART.

4. The POE powered isolated portable wireless gateway of claim 3, further comprising a Type-C, wherein a universal asynchronous receiver/transmitter UART between the MCU and the WIFI module is connected to the Type-C via a serial port chip, and the Type-C is connected to a power source.

5. The POE powered isolated portable wireless gateway of claim 4, wherein said serial port chip is a CH9102 model serial port chip.

6. The POE powered isolated portable wireless gateway of claim 1, wherein the power source is specifically a 5V power source.

7. The POE powered isolated portable wireless gateway of claim 1, wherein the LDO is specifically 3.3VLDO.