Safety metering circuit of socket

Abstract

The utility model discloses a safety metering circuit of a socket, which relates to the technical field of electronics and comprises a metering module, a single chip microcomputer and a display module. The metering module is used for detecting a current value and a voltage value of the socket; the single-chip microcomputer is used for receiving the current value and the voltage value detected by the metering module. The single chip microcomputer is also used for calculating real-time power according to the current value and the voltage value detected by the metering module; the single-chip microcomputer is also used for calculating the ratio of the real-time power to the rated power. The single-chip microcomputer is also used for controlling the alarm information displayed by the display module according to the ratio of the real-time power to the rated power, and compared with the prior art, the alarm is given when the real-time power exceeds the rated power, so that the load work of the socket exceeding the design standard for a long time is effectively avoided, and the risks of faults and fire are reduced.

Description

Technical Field

[0001] This application relates to the field of electronic technology, and more particularly to a safety metering circuit for a socket. Background Technology

[0002] In modern society, with the widespread use of various electronic devices and the continuous increase in people's electricity demand, the number of electrical devices in daily life and work is increasing day by day. Against this backdrop, the limited power interfaces provided by a single socket can no longer meet the diverse and ever-growing electricity needs of users. In order to expand the number of power interfaces, users often use power strips to achieve the purpose of powering multiple devices at the same time.

[0003] However, this method of electricity use also brings serious safety hazards. In actual use, due to the complexity of electricity usage scenarios and differences in users' electricity habits, multiple high-power appliances are often connected to the same power strip at the same time. Ordinary users often lack professional electrical knowledge and effective monitoring methods, making it difficult to accurately determine whether the total power carried by the power strip and socket has exceeded its safety design range.

[0004] When the total power of appliances connected to a power strip exceeds its safe carrying capacity, the internal wiring, socket interfaces, and related electrical components will experience excessive current. This not only leads to increased heating of the wiring and accelerated aging of the insulation layer, potentially causing short circuits, but also loosens the socket interfaces, increasing contact resistance and generating even more heat. All of these factors significantly increase the risk of fire, seriously threatening the lives and property of users. Furthermore, prolonged overload operation will shorten the lifespan of both the power strip and the appliances, resulting in unnecessary economic losses.

[0005] Currently, some electrical products on the market with metering functions, such as sockets and switches, require a mobile app to view their actual power consumption. However, in reality, most users don't frequently open the app to check this data. Firstly, frequent app operation is cumbersome, and in a fast-paced life, people often don't have time for such operations. Secondly, in emergency or temporary power usage scenarios, checking power consumption via an app is not convenient or efficient enough. Summary of the Invention

[0006] I. Technical problems to be solved

[0007] In view of the aforementioned shortcomings of existing technologies, how can the safety of sockets be further improved?

[0008] II. Technical Solution

[0009] To solve the above problems, a safety metering circuit for a socket is provided, which includes a metering module, a microcontroller, and a display module.

[0010] The metering module is used to detect the current and voltage values ​​of the socket;

[0011] The microcontroller is used to receive the current and voltage values ​​detected by the metering module; the microcontroller is also used to calculate the real-time power based on the current and voltage values ​​detected by the metering module.

[0012] The microcontroller is also used to calculate the ratio of real-time power to rated power;

[0013] The microcontroller is also used to control the alarm information displayed by the display module based on the ratio of real-time power to rated power.

[0014] The display module includes LEDs;

[0015] When the ratio of real-time power to rated power is greater than 1, the microcontroller controls the LED to display the first color.

[0016] When the ratio of real-time power to rated power is less than or equal to 1, the microcontroller controls the LED to display a second color.

[0017] The circuit also includes a power supply module, which provides operating voltage to the other modules.

[0018] When the metering module detects that the current value exceeds the preset overload current value, the microcontroller controls the LED to display the first color.

[0019] It also includes a temperature detection unit, which is used to detect the temperature value of the socket. When the temperature value of the socket exceeds the preset temperature value, the microcontroller controls the LED to display the first color.

[0020] The display module also includes a sound-emitting device, which is used to emit an audible alarm when the microcontroller controls the LED display to show the first color.

[0021] It also includes a communication module, through which the microcontroller communicates with the host computer.

[0022] The communication module is a WIFI module.

[0023] III. Beneficial Effects of this Application

[0024] Compared with existing technologies, this application effectively prevents the socket from operating beyond its design load for extended periods by issuing an alarm when the real-time power exceeds the rated power, thereby reducing the risk of malfunction and fire. Attached Figure Description

[0025] Figure 1This is the circuit schematic diagram of this application; Detailed Implementation

[0026] The specific embodiments of this application will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this application.

[0027] Example 1:

[0028] like Figure 1 As shown, after power-on, the AC mains power is converted into DC 5V and 3.3V through the AC-DC non-isolated step-down circuit, which power the metering chip U3, the microcontroller U4, the WIFI chip U5, and the LED, respectively.

[0029] When the electrical appliance is connected to the socket and starts working, the metering module includes a sampling resistor R3. When current flows through the sampling resistor R3, a voltage drop proportional to the current magnitude is generated across the sampling resistor R3. In this embodiment, when a 1A current flows, a 2mV voltage drop is generated across the sampling resistor. This voltage drop is transmitted as a current sampling signal to the metering chip U1. The metering chip U3 calculates the discharge current value according to Ohm's law and transmits the current value to the microcontroller U4.

[0030] A series resistor R6-R10 is connected between the VP pin of the metering chip U3 and the live wire. Through these five resistors, the metering chip U3 obtains the discharge voltage value by voltage division and transmits the voltage value to the microcontroller U4.

[0031] The microcontroller U4 continuously receives voltage and current values ​​from the metering chip U3. After receiving the data, the microcontroller U4 calculates the real-time power using the power formula: Power = Voltage × Current.

[0032] The microcontroller U4 will also continuously calculate the ratio of real-time power to the preset rated power of the socket. The microcontroller U4 obtains the ratio using the following formula: Ratio = Real-time power / Rated power;

[0033] If the ratio is less than or equal to 1, the microcontroller U4 controls the green LED to light up.

[0034] If the ratio is greater than 1, the microcontroller U4 controls the red LED to light up.

[0035] By triggering an alarm when the real-time power exceeds the rated power, the system effectively prevents the socket from operating beyond its design specifications for extended periods, reducing the risk of malfunctions and fires.

[0036] The microcontroller U4 will also continuously detect any abnormal situations. When the metering chip U3 detects that the current value exceeds the preset overload current value (in this embodiment, the preset overload current value is 10A), the microcontroller U4 controls the red LED to light up.

[0037] The protection measure, which alarms when the current exceeds the preset overload current value, effectively prevents fires or electrical malfunctions caused by overload.

[0038] The microcontroller U4 transmits data to the user's mobile terminal via the WIFI chip U5. Users simply need to open a dedicated app on their mobile terminal to view the device's specific load usage anytime, anywhere, including but not limited to detailed information such as real-time power, current, and voltage values. Whether at home, in the office, or outdoors, as long as the mobile terminal is within network coverage, users can conveniently and promptly obtain the device's power consumption data, thereby better planning power usage, improving power efficiency, and ensuring power safety.

[0039] Example 2:

[0040] The difference between this embodiment and embodiment 1 is that in this embodiment, the microcontroller U4 controls the light emission of MOSFETs Q1, Q2, and Q3, as well as three LEDs of different colors, through PWM signals, thereby adjusting the final color and brightness of the LEDs.

[0041] In this embodiment,

[0042] When the ratio is less than 0.4, the LED is green;

[0043] When the ratio is greater than or equal to 0.4 and less than 0.6, the LED is yellow-green;

[0044] When the ratio is greater than or equal to 0.6 and less than 0.8, the LED is yellow;

[0045] When the ratio is greater than or equal to 0.8 and less than 1, the LED is orange;

[0046] When the ratio is greater than 1, the LED is red;

[0047] Those skilled in the art can adjust the ratio and corresponding color according to actual needs.

[0048] By further differentiating the colors of different loads, users can intuitively see the usage status of the load.

[0049] The above embodiments are only used to illustrate this application and are not intended to limit this application. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of this application. Therefore, all equivalent technical solutions also fall within the scope of this application, and the patent protection scope of this application should be defined by the claims.

Claims

1. A safety metering circuit for a socket, characterized in that, The circuit includes a metering module, a microcontroller, and a display module; The metering module is used to detect the current and voltage values ​​of the socket; The microcontroller is used to receive the current and voltage values ​​detected by the metering module; the microcontroller is also used to calculate the real-time power based on the current and voltage values ​​detected by the metering module. The microcontroller is also used to calculate the ratio of real-time power to rated power; The microcontroller is also used to control the alarm information displayed by the display module based on the ratio of real-time power to rated power.

2. The safety metering circuit for a socket as described in claim 1, characterized in that, The display module includes LEDs; When the ratio of the real-time power to the rated power is greater than 1, the microcontroller controls the LED to display the first color.

3. The safety metering circuit for a socket as described in claim 2, characterized in that, When the ratio of the real-time power to the rated power is less than or equal to 1, the microcontroller controls the LED to display a second color.

4. The safety metering circuit for a socket as described in claim 1, characterized in that, The circuit also includes a power supply module that provides operating voltage to the other modules.

5. The safety metering circuit for a socket as described in claim 3, characterized in that, When the metering module detects that the current value exceeds the preset overload current value, the microcontroller controls the LED to display the first color.

6. The safety metering circuit for a socket as described in claim 1, characterized in that, It also includes a communication module, through which the microcontroller communicates with the mobile terminal.

7. The safety metering circuit for a socket as described in claim 6, characterized in that, The communication module is a WIFI module.

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