CN207382047U - Power-down detection and main-standby power switching system in smart home system - Google Patents

Abstract

The present invention discloses a system for power failure detection and main-standby power switching in a smart home system, comprising a main-standby power supply module, a main-standby power switch control circuit, a power-down storage module, a wireless transmission alarm module, and intelligent electrical equipment. Among them, the main and standby power supply switching control circuit is bidirectionally connected with the main and standby power supply module, the power failure storage module and the wireless transmission alarm module. Switching control circuit, when the mains power supply line fails, it can automatically complete the switching of the main and backup circuits and can display the electrical parameters of the power supply circuit in real time, ensuring uninterrupted power supply of smart home equipment; at the same time, a power-down storage circuit is set, which can store The working state of the smart home equipment before power failure is restored to the working state of the smart home equipment before the power failure after switching between the main and standby power sources. The utility model also has a simple circuit structure and is convenient for detection and control.

Description

Power-down detection and main-standby power switching system in smart home system

technical field

The utility model belongs to the technical field of smart home, and specifically relates to a system for detecting power failure and switching main and standby power sources in a smart home system.

Background technique

With the development of society and the progress of the times, people's quality of life has been greatly improved. Internet + technology has increasingly penetrated into people's lives. Develop in the direction of networking and intelligence. In the smart home system, people can remotely monitor and control the electrical equipment in the home through mobile phones, which meets people's needs for comfort, convenience, and safety in home life.

With the popularization of smart home devices and detection devices, an important problem is coming. If the mains power used by the family is cut off when the device is in use, the device will be in a power-off state, which will enable real-time detection of the device. Data transmission, control measurement and other functions have a more important impact.

Utility model content

The technical problem to be solved by the new model is to provide a power-down detection and main-standby power switching system in a smart home system that has a simple circuit structure, is easy to control, and can ensure that the working status of smart home electrical equipment is consistent before and after power switching.

In order to solve the problems referred to above, the technical solution adopted by the present invention is:

A power-down detection and main-standby power switching system in a smart home system, including a main-standby power supply module, a main-standby power switch control circuit, a power-down storage module, a wireless transmission alarm module, and intelligent electrical equipment, wherein the main-standby power supply The switching control circuit is bidirectionally connected with the main and backup power supply modules, the power failure storage module and the wireless transmission alarm module. The status of the backup power supply module and control the switching between the main power supply and the backup power supply. The power-down storage module is used to store the working status of the intelligent electrical equipment at regular intervals. The wireless transmission alarm module is used to transmit the status of the intelligent electrical equipment. Switch to the main and backup power supply control circuit and store it in the power-down storage module under its control, and when the main power supply fails and switches to the backup power supply, the fault information is sent to the wireless transmission alarm module for alarm, and at the same time, the power supply of the electrical equipment is switched over The last working state before is read from the power-down storage module and sent to the electrical equipment.

Further, the switching control circuit for main and standby power supplies includes a mains output control circuit, a power storage output control circuit, and an MCU circuit, wherein the mains output control circuit includes resistors R1-R3, an optocoupler U1, a switch tube Q1, and a relay K1, The input terminal 1 of the optocoupler U1 is connected to the power supply 3.3V through the resistor R1, the input terminal 2 of the optocoupler U1 is connected to the output control signal CN0 of the MCU circuit, and the output terminal 3 of the optocoupler U1 is connected to the gate of the switch tube Q1 at the same time. The resistor R3 is grounded, the output terminal 4 of the optocoupler U1 is connected to the power supply VCC1 through the resistor R2, the source of the switching tube Q1 is grounded, the drain of the switching tube Q1 is connected to one end of the coil of the relay K1, and the other end of the coil of the relay K1 is connected to the power supply VCC1. Both ends of the two groups of normally open points of relay K1 are respectively connected to the mains and electrical equipment; the power storage output control circuit includes resistors R10-R13, optocoupler U2, switch tube Q2 and relay K2, and the input terminal 1 of optocoupler U2 passes through The resistor R10 is connected to the power supply 3.3V, the input terminal 2 of the optocoupler U2 is connected to the output control signal CN1 of the MCU circuit, and the power supply VCC1 is connected through the resistor R13, and grounded through the capacitor C1, and the output terminal 3 of the optocoupler U2 is connected to the gate of the switch tube Q2 At the same time, the pole is grounded through the resistor R12, the output terminal 4 of the optocoupler U2 is connected to the power supply VCC2 through the resistor R11, the source of the switching tube Q2 is grounded, the drain of the switching tube Q2 is connected to one end of the coil of the relay K2, and the other end of the coil of the relay K2 is connected to The power supply VCC2 and two sets of normally open points of the relay K2 are respectively connected to power storage and power consumption equipment; the power supply VCC1 is a power supply step-down and rectified by the mains, and the power supply VCC2 is a power storage power supply.

Further, it also includes the power supply mode selection and power display module, which is a touch screen or user mobile phone terminal. The user can select and switch the main power supply and the backup power supply through the buttons on the touch screen or the user mobile phone terminal, and display various power supplies of the power supply line. Parameter measurement results.

Preferably, the smart electric device is a device with wireless communication function, including home anti-theft electric device, home environment detection electric device and home control electric device.

Preferably, the wireless transmission alarm module includes a wireless transmission module, a user terminal and a terminal of a power supply company, and the mains fault information is transmitted to the terminal of the power supply company or the user terminal through the wireless transmission module, so that the power supply company or the user knows the fault information at the first time, Be prepared to troubleshoot.

Preferably, the main and backup power supply module includes a main power supply and a backup power supply. The backup power supply uses a storage battery, and the storage battery is charged by the solar panel through the charging and discharging controller to protect the storage battery. The electric output control circuit supplies power, and the battery voltage is converted into the same AC power as the mains power by the inverter to supply the intelligent electrical equipment. Mains output control circuit power supply.

The beneficial effects produced by adopting the above-mentioned technical scheme are:

The smart home system of the utility model adopts main and standby dual power supplies, and is equipped with main power failure detection and main and standby power switching control circuits. The electrical parameters of the circuit provide a reference for users to grasp the power consumption and ensure the uninterrupted power supply of smart home devices; at the same time, a power-down storage circuit is set to store the working status of smart home devices before power-off. After the switching, the working state of the smart home equipment is restored to that before the power failure. The utility model also has a simple circuit structure and convenient detection and control.

Description of drawings

Fig. 1 is a block diagram of the utility model;

Fig. 2 is a schematic diagram of the main and standby power switching control circuit of the utility model;

Fig. 3 is a schematic diagram of the MCU circuit and the storage circuit of the utility model.

Detailed ways

Below in conjunction with accompanying drawing, this new model is described in further detail:

The utility model is a power-down detection and main-standby power switching system for smart home equipment, which can ensure the uninterrupted power supply of the smart home equipment, and can restore the working state change caused by the smart home equipment when the power supply flashes off to the power supply. Before power failure (power flash).

As shown in Figure 1, the utility model includes a main and standby power supply module, a main and standby power switching control circuit, a power failure storage module, a wireless transmission alarm module, a power supply mode selection and power display module, and intelligent electrical equipment, wherein the main and standby power supply The switching control circuit is bidirectionally connected with the main and backup power supply modules, the power failure storage module and the wireless transmission alarm module. The status of the backup power supply module and control the switching between the main power supply and the backup power supply. The power-down storage module is used to store the working status of the intelligent electrical equipment at regular intervals. The wireless transmission alarm module is used to transmit the status of the intelligent electrical equipment. Switch to the main and backup power supply control circuit and store it in the power-down storage module under its control, and when the main power supply fails and switches to the backup power supply, the fault information is sent to the wireless transmission alarm module for alarm, and at the same time, the power supply of the electrical equipment is switched over The previous and last working status is read from the power-down storage module and sent to the electrical equipment. The power supply mode selection and power display module is used to display the measurement results of various electrical parameters of the power supply line and the selection of the main and backup power sources.

As shown in Figure 1, the smart electrical equipment of the present invention is a device with wireless communication function, including household anti-theft electrical equipment (door and window detection, electromagnetic door lock, etc.), household environment detection electrical equipment (temperature and humidity , combustible gas, etc.) and household control electrical equipment (curtains, air conditioners, etc.). The wireless transmission alarm module includes a wireless transmission module, user terminals and power supply company terminals. Mains fault information is transmitted to the power supply company terminals or user terminals through the wireless transmission module, so that the power supply company or users know the fault information at the first time and make preparations for troubleshooting . The main and backup power supply module includes the main power supply and the backup power supply. The backup power supply uses a battery. The battery is charged by the solar panel through the charge and discharge controller to protect the battery. The battery supplies power to the storage output control circuit in the main and backup power switching control circuit. , the battery voltage is converted into the same AC power as the mains power by the inverter to supply the intelligent electrical equipment, the main power supply is the mains power, and the mains power is converted into a low-voltage power supply through the switching power supply to the mains output control circuit in the main and standby power switching control circuit powered by.

For the consideration of energy saving and environmental protection, the utility model designs two sets of power supply circuits, one set comes from the mains, and the other set comes from the battery powered by solar charging. When the power supply is normal, you can select and switch the two sets of power supply equipment through the selection of the power supply mode and the button on the touch screen of the power display module or the user's mobile phone terminal to complete the power supply to the smart home equipment. At the same time, the electrical parameters (voltage, current, power factor, etc.) of the power supply line are measured in real time, and the measurement results are displayed on the touch screen or the user's mobile phone terminal, providing a certain reference for the user to grasp the power consumption.

As shown in Figures 2 and 3, the main and standby power switching control circuit of the present invention includes a mains output control circuit, a power storage output control circuit and an MCU circuit, wherein the mains output control circuit includes resistors R1-R3, optocoupler U1, The switch tube Q1 and the relay K1, the input terminal 1 of the optocoupler U1 is connected to the power supply 3.3V through the resistor R1, the input terminal 2 of the optocoupler U1 is connected to the output control signal CN0 of the MCU circuit, and the output terminal 3 of the optocoupler U1 is connected to the switch The gate of the tube Q1 is grounded through the resistor R3 at the same time, the output terminal 4 of the optocoupler U1 is connected to the power supply VCC1 through the resistor R2, the source of the switching tube Q1 is grounded, the drain of the switching tube Q1 is connected to one end of the coil of the relay K1, and the coil of the relay K1 The other end of the relay K1 is connected to the power supply VCC1, and the two ends of the two sets of normally open points of the relay K1 are respectively connected to the mains and electrical equipment; the power storage output control circuit includes resistors R10-R13, optocoupler U2, switch tube Q2, relay K2, optocoupler The input pin 1 of U2 is connected to the power supply 3.3V through the resistor R10, and the input pin 2 of the optocoupler U2 is connected to the output control signal CN1 of the MCU circuit. The pin is connected to the gate of the switching tube Q2 and grounded through the resistor R12 at the same time, the output terminal 4 of the optocoupler U2 is connected to the power supply VCC2 through the resistor R11, the source of the switching tube Q2 is grounded, and the drain of the switching tube Q2 is connected to one end of the coil of the relay K2. The other end of the relay K2 coil is connected to the power supply VCC2, and the two ends of the two sets of normally open points of the relay K2 are connected to the power storage and power consumption equipment respectively; battery power). The core of the MCU circuit is the STM32 chip U3. When the mains power supply is normal, the output control terminal CN0 of the STM32 chip U3 outputs a low level, and the optocoupler U1 is turned on. The photosensitive part and resistor R3 divide the voltage, drive the light switch Q1 to turn on, the relay K1 pulls in, and the mains power is sent to the smart home electrical equipment through the relay K1. At the same time, the power supply VCC1 step-down and rectified by the mains charges the capacitor C1 through the resistor R13. After the capacitor C1 is fully charged, the output control terminal CN1 of the STM32 chip U3 becomes high level, the photocoupler U2 is in the cut-off state, and the backup power supply will not be put into operation. . STM32 chip U3 also receives the electrical parameters (voltage, current, power factor, etc.) of the power supply line, and sends them to the touch screen or user mobile terminal for display after processing.

When the mains fails, the mains will automatically trip and cut off. The VCC1 terminal of the power supply step-down and rectified by the mains stops supplying power (the voltage disappears), and the capacitor C1 in the power storage output control circuit starts to discharge. After the discharge is completed, the output control terminal CN1 of the STM32 chip U3 becomes low level, and the optocoupler U2 is turned on , the storage power supply VCC2 is divided by the resistor R11, the photosensitive part of the optocoupler, and the resistor R12 to drive the light switch Q2 to conduct, the relay K2 is pulled in, and the stored power (after being transformed by the inverter) is sent to the smart home through the relay K2 electrical equipment. At the same time, STM32 chip U3 activates the wireless transmission alarm module through the serial port, and sends the mains failure information to the power supply department or user terminal for prompting, which is convenient for users to detect and maintain.

After the user repairs the mains, the mains is manually switched on. At this time, the output control terminal CN1 of the STM32 chip U3 outputs a high level first, and then the output control terminal CN0 outputs a low level, and then the output control terminal CN1 outputs a low level. level (the time interval for the output control terminal CN1 to change from a high level to a low level is longer than the time when the capacitor C1 is fully charged), the main and standby power switching control circuit resumes normal operation.

As shown in Figure 3, the utility model is also provided with a power-down storage module, the core circuit of the power-down storage module is the storage chip U4 and its peripheral circuit, the storage chip U4 adopts 24c02, and the STM32 chip U3 will receive The working status parameters from the smart home electrical equipment are stored in the 24c02 chip, and the 24c02 chip is stored in real time to ensure that all data are stored during transmission, making the data storage more accurate.

When the mains fails, the STM32 processing chip will read the detection and control data of the smart home electrical equipment in the 24c02 chip before the mains failure, and send the data to the smart home electrical equipment in real time to restore it to the state before the failure working status.

After the user repairs the mains, the STM32 chip U3 reads the detection and control data of the smart home electrical equipment in the 24c02 storage module before the power storage is disconnected, and sends the data to the smart home electrical equipment in real time to restore it to the storage. The working state before the electricity is switched to the mains.

Claims (6)

1. A power failure detection and main-standby power switching system in a smart home system, characterized in that it includes a main-standby power supply module, a main-standby power switch control circuit, a power-down storage module, a wireless transmission alarm module and an intelligent power supply equipment, wherein the main and standby power supply switching control circuit is bidirectionally connected with the main and standby power supply module, the power failure storage module and the wireless transmission alarm module. The control circuit is used to detect the state of the main and backup power supply modules and control the switch between the main power supply and the backup power supply. The power-down storage module is used to store the working status of the intelligent electrical equipment at regular The state of the electrical equipment is transmitted to the main and standby power switching control circuit and stored in the power-down storage module under its control, and when the main power fails and switches to the backup power, the fault information is sent to the wireless transmission alarm module for alarm, and at the same time The last working state of the electrical equipment before power failure switching is read from the power-failure storage module and sent to the electrical equipment. 2. The power-down detection and main-standby power switching system in the smart home system according to claim 1, characterized in that: the main-standby power switching control circuit includes a mains output control circuit, a power storage output control circuit and an MCU The mains output control circuit includes resistors R1-R3, optocoupler U1, switch tube Q1 and relay K1. The input terminal 1 of optocoupler U1 is connected to the power supply 3.3V through resistor R1, and the input terminal 2 of optocoupler U1 is connected to The output control signal CN0 of the MCU circuit, the output terminal 3 of the optocoupler U1 is connected to the gate of the switch tube Q1 and grounded through the resistor R3, the output terminal 4 of the optocoupler U1 is connected to the power supply VCC1 through the resistor R2, and the source of the switch tube Q1 Grounding, the drain of the switching tube Q1 is connected to one end of the coil of the relay K1, the other end of the coil of the relay K1 is connected to the power supply VCC1, and the two ends of the normally open points of the relay K1 are respectively connected to the mains and the electrical equipment; the power storage output control circuit includes Resistors R10-R13, optocoupler U2, switch tube Q2 and relay K2, the input pin 1 of optocoupler U2 is connected to the power supply 3.3V through resistor R10, the input pin 2 of optocoupler U2 is connected to the output control signal CN1 of the MCU circuit at the same time Resistor R13 is connected to the power supply VCC1 and grounded through capacitor C1. The output terminal 3 of the optocoupler U2 is connected to the grid of the switch tube Q2 and grounded through the resistor R12. The output terminal 4 of the optocoupler U2 is connected to the power supply VCC2 through the resistor R11, and the switch tube Q2 The source of the switch tube Q2 is connected to one end of the coil of the relay K2, the other end of the coil of the relay K2 is connected to the power supply VCC2, and the two ends of the two sets of normally open points of the relay K2 are respectively connected to the power storage and power consumption equipment; VCC1 is a power supply step-down and rectified by the commercial power, and the power supply VCC2 is a storage power supply. 3. The power-down detection and main-standby power switching system in the smart home system according to claim 1 or 2, characterized in that: it also includes a power supply mode selection and power display module, the module is a touch screen or a user mobile terminal, and the user Select and switch the main power supply and backup power supply through the buttons on the touch screen or the user's mobile phone terminal, and display the measurement results of various electrical parameters of the power supply line. 4. The power-down detection and main-standby power switching system in the smart home system according to claim 3, characterized in that: the smart electrical equipment is a device with a wireless communication function, including household anti-theft electrical equipment, Home environment detection electrical equipment and household control electrical equipment. 5. The power-down detection and main-standby power switching system in the smart home system according to claim 3, characterized in that: the wireless transmission alarm module includes a wireless transmission module, a user terminal and a terminal of a power supply company, and the mains fault information Through the wireless transmission module, it is transmitted to the terminal of the power supply company or the user terminal, so that the power supply company or the user can know the fault information at the first time, and make preparations for troubleshooting. 6. The power-down detection and main-standby power switching system in the smart home system according to claim 3, characterized in that: the main-standby power supply module includes a main power supply and a backup power supply, the backup power supply adopts a storage battery, and the storage battery is powered by solar energy The board charges the battery through the charge-discharge controller and protects the battery. The battery supplies power to the power storage output control circuit in the main and standby power switching control circuit. The battery voltage is converted into the same AC power as the mains power by the inverter to supply the smart electrical equipment. , the main power supply is commercial power, and the commercial power is converted into a low-voltage power supply through the switching power supply to supply power to the mains output control circuit in the main and standby power switching control circuit.