WIFIPOT circuit

Abstract

The utility model belongs to the field of interactive circuits, particularly relates to a WIFI POT circuit, and aims to solve the problems that the existing system communication mode based on the WIFI POT circuit is complicated, and a high-voltage end circuit is easy to interfere with the communication stability. In order to solve the problems that a system based on a WIFIPOT circuit is large in standby power consumption and not beneficial to popularization and use, the utility model provides the following scheme that the system comprises an MCU control circuit, the MCU control circuit comprises an interactive interface communication module, a power reading circuit and a power control circuit, the power reading circuit comprises an IM1281B alternating current power acquisition module and an RS485 bus, and the power control circuit comprises an RS485 bus. The IM1281B alternating current power acquisition module and the RS485 bus are in communication transmission connection through TTL, the communication mode is simple and efficient, a low-voltage circuit and a high-voltage circuit prevent interference from a high-voltage end through optoelectronic isolation, in addition, a high-power magnetic latching relay serves as an action element, electric energy is consumed only at the moment of action, and the power consumption is low. And the standby power consumption and heating of the system are greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of interactive circuits, and particularly relates to a WIFI POT circuit. Background Art

[0002] The network remote intelligent control system is a system for intelligent management of gardens or smart agriculture based on a WIFI POT circuit. The system consists of an electrical control cabinet and a WeChat mini-program. Devices to be controlled can be connected as needed. For example, to control courtyard lighting facilities, courtyard watering facilities, fish pond aeration, etc., only the power cord of the traditional device needs to be connected to this device, and then remote control operations on the device can be realized in the mini-program.

[0003] The existing WIFI POT circuit still has the following obvious problems in design:

[0004] The communication method is relatively cumbersome, and the high-voltage circuit is prone to interfering with the communication stability;

[0005] The standby power consumption of the system based on the WIFI POT circuit is large, which is not conducive to popularization and use;

[0006] The use of wireless network communication is restricted by the distance. Sometimes, the mini-program on the mobile phone cannot reliably and stably operate to control the hardware.

[0007] Therefore, a WIFI POT circuit is needed to solve the above-mentioned problems. Content of the Utility Model

[0008] The purpose of the utility model is to provide a WIFI POT circuit to solve the problems in the prior art that the communication method is relatively cumbersome, the high-voltage circuit is prone to interfering with the communication stability, and the standby power consumption of the system based on the WIFI POT circuit is large, which is not conducive to popularization and use.

[0009] To achieve the above purpose, the utility model adopts the following technical scheme:

[0010] A WIFI POT circuit includes an MCU control circuit, and the MCU control circuit includes a flow card module, an interactive interface communication module, a power reading circuit, and a power control circuit;

[0011] The flow card module includes a flow card interface unit with a built-in patch flow card.

[0012] In a possible design, the power reading circuit includes an IM1281B AC power acquisition module and an RS485 bus. The IM1281B AC power acquisition module and the RS485 bus are connected through TTL communication transmission. The interaction interface communication module and the IM1281B AC power acquisition module are connected for interactive transmission.

[0013] In a possible design, the power control circuit includes an IoT module, an I2C bus, a PCF8574T I2C bus expansion chip, and a high-power magnetic latching relay driver. The IoT module and the PCF8574T I2C bus expansion chip are connected for bidirectional communication transmission through the I2C bus. The PCF8574T I2C bus expansion chip and the high-power magnetic latching relay driver are connected for interactive communication through an opto-isolation module for preventing high-voltage terminal interference. The IoT module and the RS485 bus are connected for communication transmission.

[0014] In a possible design, the interaction interface communication module includes a user input receiving unit for receiving user terminal instructions and a system timing specification receiving unit for receiving system timing specifications. Both the user input receiving unit and the system timing specification receiving unit are connected for communication transmission with the IM1281B AC power acquisition module.

[0015] In a possible design, the PCF8574T I2C bus expansion chip is connected for communication transmission with multiple driving chips for control. The IoT module includes a judgment unit for judging power thresholds and communicating through the I2C bus and the PCF8574T I2C bus expansion chip when the threshold exceeds the set value.

[0016] In a possible design, the I2C bus includes a data line and a clock line for completing data transmission and peripheral device expansion. The transmission rate of the 2C bus is 100Kpbs - 3.4Mpbs.

[0017] In this application, during the working process, the built-in patch flow card can provide 2G / 3G / 4G / 5G networks to realize the mutual interactive communication between this circuit and cloud data information, making the operation of the user terminal more stable and preventing the situation that this circuit cannot be operated due to communication problems caused by the distance. The user inputs control instructions or sets power thresholds through the interaction interface, and the instructions are transmitted to the MCU through the interaction interface communication module. The MCU sends acquisition instructions to the IM1281B AC power acquisition module through the RS485 bus, and receives and processes the returned power data.

[0018] The Internet of Things module receives the power data sent by the MCU through the I2C bus and compares it with a preset power threshold. When the power exceeds the threshold, the judgment unit of the Internet of Things module sends a control signal to the PCF8574T through the I2C bus, and the PCF8574T then controls the on-off state of the high-power magnetic latching relay through the opto-isolation module to achieve the on-off control of the load circuit. The Internet of Things module can also upload the power data to a remote server for further analysis and monitoring.

[0019] In the present utility model, the WIFIPOT circuit communicates remotely with the server through the Internet of Things module, and receives the operation instructions from the user's mobile phone and the timed job instructions from the server. After receiving the instructions, through I2C bus communication, the instructions are sent to the PCF8574T I2C bus expansion chip, and then the action instructions are safely sent to the drive chip through opto-isolation, and finally the high-power magnetic latching relay connects or disconnects the working load.

[0020] In the present utility model, the power reading circuit of the WIFIPOT circuit collects power data through the IM1281B AC power acquisition module, and finally obtains it through the RS485 bus by the Internet of Things module. The Internet of Things module judges the threshold value. If it exceeds the threshold value, it sends an instruction to the PCF8574T I2C bus expansion chip through the I2C bus to finally drive the high-power magnetic latching relay to perform the turn-off action.

[0021] In the present utility model, the communication method is simple and efficient. The low-voltage circuit and the high-voltage circuit are isolated by opto-isolation to prevent interference from the high-voltage end. In addition, by using a high-power magnetic latching relay as the action element, it only consumes electric energy at the moment of action, greatly reducing the standby power consumption and heat generation of the system. Description of the Drawings

[0022] Figure 1 It is the circuit diagram of the MCU control circuit of a WIFIPOT circuit proposed by the present utility model;

[0023] Figure 2 It is the circuit diagram of the power reading circuit of a WIFIPOT circuit proposed by the present utility model;

[0024] Figure 3 It is the circuit diagram of the power control circuit of a WIFIPOT circuit proposed by the present utility model. Detailed Embodiment

[0025] Refer to Figures 1-3 , a WIFIPOT circuit, which integrates an MCU control circuit, a power reading circuit and a power control circuit, aiming to achieve intelligent power monitoring and control functions.

[0026] I. Implementation of the MCU Control Circuit

[0027] MCU Core: Select a high-performance microcontroller (MCU) as the core processor, such as the STM32 series. This MCU is responsible for the control and data processing of the overall circuit.

[0028] Interactive Interface Communication Module: This module includes a user input receiving unit and a system timing instruction receiving unit. The user input receiving unit can be a touch screen or a button interface, which is used to receive instructions input by the user through the interface, such as setting power thresholds, switch control, etc. The system timing instruction receiving unit is responsible for receiving timing control instructions issued by the internal timer of the system, such as timing power data acquisition, etc. These instructions communicate with the MCU through the internal bus.

[0029] Flow Card Module: The patch flow card built in the flow card interface unit can provide 2G / 3G / 4G / 5G networks to realize the mutual interactive communication between this circuit and cloud data information, making the operation of the user side more stable and preventing the situation that this circuit cannot be operated due to communication problems regardless of the distance.

[0030] II. Implementation of the Power Reading Circuit

[0031] IM1281B AC Power Acquisition Module: This module is used to collect parameters such as voltage, current, and power of alternating current in real time. IM1281B communicates with the MCU through the RS485 bus and transmits the collected data. The RS485 bus is connected to the MCU through a TTL level conversion interface to achieve stable data transmission.

[0032] RS485 Bus: Select a highly reliable RS485 communication module to ensure the accuracy and stability of data transmission over long distances and in complex environments.

[0033] III. Implementation of the Power Control Circuit

[0034] Internet of Things Module: Use an ESP8266 or a similar Wi-Fi module as the Internet of Things module to communicate with the remote server through the Wi-Fi network, upload power data or receive control instructions. The Internet of Things module is connected to the MCU through the I2C bus for two-way communication.

[0035] I2C Bus: The I2C bus includes a data line and a clock line, which are used for data transmission between the MCU, the Internet of Things module, and the PCF8574T I2C bus expansion chip. Set the transmission rate of the I2C bus to 1 Mbps to meet the requirements of data transmission speed and stability.

[0036] PCF8574T I2C Bus Expansion Chip: This chip is used to expand the control ports of the I2C bus and is connected to the MCU via the I2C bus. The PCF8574T is connected to the high-power magnetic latching relay drive circuit through an optoelectronic isolation module to achieve electrical isolation and prevent interference from the high-voltage end to the control circuit.

[0037] High-power Magnetic Latching Relay Drive: A high-power magnetic latching relay that can withstand high voltage and large current is selected, and its switching state is controlled through a drive circuit to achieve on / off control of the load circuit.

[0038] Judgment Unit: The IoT module is built-in with a judgment unit that compares the received power data with a preset power threshold. When the actual power exceeds the threshold, a control signal is sent to the PCF8574T via the I2C bus to control the switching state of the relay.

[0039] This application can be used in the field of circuit control and is also applicable to other fields of this application.

[0040] However, as is well known to those skilled in the art, the working principles and wiring methods of the IoT module, I2C bus, PCF8574T I2C bus expansion chip, high-power magnetic latching relay drive, IM1281B AC power acquisition module, and RS485 bus are common knowledge. They all belong to conventional means or well-known common sense and will not be elaborated here. Those skilled in the art can make arbitrary selections according to their needs or convenience.

Claims

1. A WIFIPOT circuit, characterized in that: include: MCU control circuit, the MCU control circuit includes a flow card module, an interactive interface communication module, a power reading circuit and a power control circuit; The flow card module includes a flow card interface unit with a built-in patch flow card.

2. A WIFIPOT circuit according to claim 1, characterized in that: The power reading circuit includes an IM1281B AC power acquisition module and an RS485 bus. The IM1281B AC power acquisition module and the RS485 bus are connected via TTL communication transmission. The interactive interface communication module and the IM1281B AC power acquisition module are interactively transmitted and connected.

3. A WIFIPOT circuit according to claim 2, characterized in that: The power control circuit includes an Internet of Things module, an I2C bus, a PCF8574T I2C bus extension chip and a high-power magnetic latching relay driver. The Internet of Things module is connected to the PCF8574T I2C bus extension chip through a bidirectional communication transmission via the I2C bus. The PCF8574T I2C bus extension chip is interactively communicated with the high-power magnetic latching relay driver through a photoelectric isolation module for preventing interference from the high-voltage end. The Internet of Things module is connected to the RS485 bus communication transmission.

4. A WIFIPOT circuit according to claim 2, characterized in that: The interactive interface communication module includes a user input receiving unit for receiving user-side instructions and a system timing designation receiving unit for receiving system timing designation. Both the user input receiving unit and the system timing designation receiving unit are connected to the IM1281B AC power acquisition module for communication transmission.

5. A WIFIPOT circuit according to claim 3, characterized in that: The PCF8574T I2C bus extension chip is connected to a plurality of driving chips for control in communication transmission, and the Internet of Things module includes a judgment unit for judging a power threshold and communicating with the PCF8574T I2C bus extension chip through the I2C bus when the threshold exceeds a set value.

6. A WIFIPOT circuit according to claim 3, characterized in that: The I2C bus includes a data line and a clock line for completing data transmission and peripheral device expansion, and the 2C bus transmission rate is 100Kpbs-3.4Mpbs.

Images