Building electrical intelligent anti-creeping system

Abstract

This utility model relates to the field of building electrical safety technology, and in particular to an intelligent building electrical leakage prevention system. It consists of a main circuit module, an intelligent detection and control module, an execution module, and a power supply module. The live and neutral wires of the main circuit module pass through a current transformer; the intelligent detection and control module is electrically connected to the signal output terminal of the current transformer for real-time acquisition and processing of current signals. The intelligent detection and control module includes a microcontroller unit and a signal conditioning circuit electrically connected to the microcontroller unit; the execution module includes a normally closed electromagnetic trip unit, the control coil of which is electrically connected to the control output terminal of the intelligent detection and control module; the power supply module supplies power to the intelligent detection and control module and the execution module. This utility model provides a leakage prevention system integrating intelligent monitoring, multi-level early warning, and remote management, which is of great significance for improving the intelligence level and reliability of building electrical safety management.

Description

Technical Field

[0001] This utility model relates to the field of building electrical safety technology, and in particular to an intelligent building electrical leakage prevention system. Background Technology

[0002] With the increasing electrification of modern buildings, the number and types of electrical equipment are growing, and the distribution of electrical wiring is becoming more complex, thus increasing the risk of electrical leakage accidents. Electrical leakage not only wastes energy but can also lead to serious consequences such as fires, equipment damage, and even electric shock. Therefore, reliable and efficient leakage protection systems have become an indispensable safety guarantee in building electrical systems. Traditional leakage protection devices detect residual current in the circuit and cut off the power supply when the current is abnormal, providing basic protection for electrical safety.

[0003] However, existing conventional leakage protection systems or devices are relatively simple in function, typically only possessing a basic "detection-tripping" protection mechanism. They cannot continuously monitor and analyze line conditions, lack fault early warning capabilities, and often only act after an accident has occurred. Furthermore, these devices generally lack remote communication capabilities, preventing managers from monitoring the system's safety status in real time, receiving early warning information, or querying historical fault records, hindering preventative maintenance and intelligent management. In addition, when faced with varying degrees of insulation degradation or intermittent leakage, fixed activation thresholds may not balance sensitivity and interference resistance, easily leading to false triggering or missing early warning opportunities. Utility Model Content

[0004] This invention provides an intelligent building electrical leakage prevention system that integrates intelligent monitoring, multi-level early warning, and remote management, which is of great significance for improving the intelligence level and reliability of building electrical safety management.

[0005] The technical solution adopted in this utility model is as follows: an intelligent building electrical leakage prevention system, comprising a main circuit module, an intelligent detection and control module, an execution module, and a power supply module.

[0006] The live and neutral wires of the main circuit module pass through a current transformer; the intelligent detection and control module is electrically connected to the signal output terminal of the current transformer for real-time acquisition and processing of current signals. The intelligent detection and control module includes a microcontroller unit and a signal conditioning circuit electrically connected to the microcontroller unit; the execution module includes a normally closed electromagnetic trip unit, the control coil of which is electrically connected to the control output terminal of the intelligent detection and control module; the power supply module supplies power to the intelligent detection and control module and the execution module.

[0007] The intelligent detection and control module receives the signal from the current transformer, and after processing the signal, determines that the residual current value exceeds the first threshold set in the microcontroller unit. Then, it sends a drive signal to the execution module through its control output terminal to drive the electromagnetic trip unit to operate and disconnect the main circuit.

[0008] As a further improvement of this utility model, the intelligent detection and control module also includes a wireless communication unit, which is electrically connected to the microcontroller unit and is used to remotely send leakage alarm information, residual current value, and tripping action status to the user terminal and cloud platform.

[0009] As a further improvement of this utility model, the wireless communication unit is one of a Wi-Fi module, a Bluetooth module, a 4 / 5G module, and an NB-IoT module.

[0010] As a further improvement of this utility model, the execution module also includes an audible and visual alarm, which is electrically connected to the alarm output terminal of the intelligent detection and control module. When leakage occurs, the microcontroller unit drives the audible and visual alarm to issue an alarm while driving the electromagnetic trip unit.

[0011] As a further improvement of this utility model, the current transformer is a high-sensitivity zero-sequence current transformer.

[0012] As a further improvement of this utility model, the power supply module is a switching power supply circuit, and its input terminal is connected in parallel between the live wire and the neutral wire of the main circuit module.

[0013] As a further improvement of this utility model, the signal conditioning circuit includes a filter circuit and an operational amplifier circuit, which are used to filter and amplify the signal collected by the current transformer and then transmit it to the microcontroller unit.

[0014] As a further improvement of this utility model, the microcontroller unit is set with a second threshold that is less than the first threshold; when the residual current value exceeds the second threshold but does not reach the first threshold, the microcontroller unit sends a warning message through its communication unit without driving the electromagnetic trip unit to operate.

[0015] The beneficial effects of this utility model are as follows: By integrating a microcontroller unit and a multi-level threshold judgment algorithm, this utility model realizes intelligent monitoring and multi-level early warning of residual current. It can quickly cut off the circuit when serious leakage occurs and issue remote early warning in the early stage of insulation deterioration, thereby upgrading the traditional passive protection to active prevention. At the same time, the remote real-time transmission of leakage status and fault information is realized with the help of a wireless communication unit, which significantly improves the safety management efficiency and intelligence level of building electrical systems and solves the problems of traditional leakage protection devices having single functions, lack of early warning capabilities and remote management methods. Attached Figure Description

[0016] Figure 1 This is a system overall structure block diagram of an intelligent building electrical leakage prevention system according to this utility model;

[0017] Figure 2 This utility model discloses the internal structure and connection block diagram of the main circuit module of an intelligent building electrical leakage prevention system.

[0018] Figure 3 This utility model relates to the internal structure and connection block diagram of an intelligent detection and control module for a building electrical intelligent leakage prevention system. Detailed Implementation

[0019] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0020] This utility model provides an intelligent building electrical leakage prevention system, which consists of a main circuit module, an intelligent detection and control module, an execution module, and a power supply module.

[0021] The live and neutral wires of the main circuit module pass through a current transformer; the intelligent detection and control module is electrically connected to the signal output terminal of the current transformer for real-time acquisition and processing of current signals; the intelligent detection and control module includes a microcontroller unit and a signal conditioning circuit electrically connected to the microcontroller unit; the execution module includes a normally closed electromagnetic trip unit, the control coil of which is electrically connected to the control output terminal of the intelligent detection and control module; the power supply module supplies power to the intelligent detection and control module and the execution module.

[0022] The intelligent detection and control module receives the signal from the current transformer, and after processing the signal, determines that the residual current value exceeds the first threshold set in the microcontroller unit. Then, it sends a drive signal to the execution module through its control output terminal to drive the electromagnetic trip unit to operate and disconnect the main circuit.

[0023] The intelligent detection and control module described in this utility model also includes a wireless communication unit, which is electrically connected to the microcontroller unit and is used to remotely send leakage alarm information, residual current value, and tripping action status to the user terminal and cloud platform.

[0024] The wireless communication unit described in this utility model is one of a Wi-Fi module, a Bluetooth module, a 4 / 5G module, and an NB-IoT module.

[0025] The execution module of this utility model also includes an audible and visual alarm, which is electrically connected to the alarm output terminal of the intelligent detection and control module. When leakage occurs, the microcontroller unit drives the audible and visual alarm to issue an alarm while driving the electromagnetic trip unit.

[0026] The current transformer described in this invention is a high-sensitivity zero-sequence current transformer.

[0027] The power module described in this utility model is a switching power supply circuit, and its input terminal is connected in parallel between the live wire and the neutral wire of the main circuit module.

[0028] The signal conditioning circuit described in this invention includes a filter circuit and an operational amplifier circuit, which are used to filter and amplify the signal collected by the current transformer before transmitting it to the microcontroller unit.

[0029] In this invention, the microcontroller unit is configured with a second threshold value that is less than the first threshold value. When the residual current value exceeds the second threshold value but does not reach the first threshold value, the microcontroller unit sends a warning message through its communication unit without driving the electromagnetic trip unit to operate.

[0030] Example:

[0031] The embodiments of this utility model are described in detail below. These embodiments are implemented based on the technical solution of this utility model, but the scope of protection of this utility model is not limited to the following embodiments.

[0032] During actual installation, the input terminal of the main circuit module is connected to the mains power (e.g., 220VAC) in the building's distribution box, and the output terminal is connected to the power line requiring protection. All system modules can be integrated and installed within a standard distribution box.

[0033] (I) Component selection and specific configuration are as follows:

[0034] Current transformer (CT): AKH-0.66L-45 high-sensitivity zero-sequence current transformer is selected, with a rated secondary output current of 2mA, which can accurately detect residual current in the milliampere range.

[0035] Microcontroller Unit (MCU): The core processor uses STMicroelectronics' STM32F103C8T6 ARM Cortex-M3 core chip, which has a built-in 12-bit ADC (analog-to-digital converter) to meet the requirements for high-precision acquisition and processing of analog signals.

[0036] Signal conditioning circuit: It consists of a first-stage RC low-pass filter circuit (resistor value 10kΩ, capacitor value 0.1μF) and a first-stage non-inverting operational amplifier circuit (using TI's LM358 chip, amplification gain set to 100 times), which is used to filter and amplify the weak AC signal output by the CT to the optimal voltage range (0-3.3V) that the MCU's ADC can acquire.

[0037] Wireless communication unit: The ESP-01S Wi-Fi module is selected. This module connects to the MCU via UART serial port (baud rate 115200), supports access to local wireless LAN (Wi-Fi), and can upload data to the cloud platform (such as Alibaba Cloud IoT platform) via MQTT protocol.

[0038] Electromagnetic trip unit: A normally closed electromagnetic trip unit with a rated current of 63A is selected. Its control coil drive voltage is DC12V. It is controlled by an MCU through a drive circuit consisting of an optocoupler and a MOSFET (such as IRF540N) to ensure strong and weak current isolation and safety and reliability.

[0039] Audible and visual alarm: An integrated audible and visual alarm with a rated voltage of DC 12V is selected. When the active buzzer sounds, the red LED flashes, which is driven by another I / O port of the MCU through a transistor.

[0040] Power supply module: It adopts an AC-DC switching power supply solution based on the OB2358 chip. The input is AC 220V and the output is a stable DC 12V and DC 5V (converted from 12V through the AMS1117-5.0 voltage regulator chip), which respectively power the execution module (electromagnetic trip unit, audible and visual alarm) and the intelligent detection and control module (MCU, operational amplifier, Wi-Fi module).

[0041] (II) The system workflow is as follows:

[0042] After the system is powered on, the power module starts working. The MCU initializes its peripherals (ADC, GPIO, UART, etc.) and reads the preset action threshold (first threshold, such as 30mA) and warning threshold (second threshold, such as 15mA) from the internal Flash.

[0043] Normal monitoring status: The vector sum of the live and neutral currents in the main circuit is ideally zero. The CT has no signal output, and the system is in a static monitoring state.

[0044] Warning Status: When leakage occurs in the line due to insulation aging, dampness, or other reasons, causing the residual current value to exceed 15mA but be below 30mA (e.g., 20mA is detected), the MCU determines it as a warning event. The MCU sends a JSON-formatted warning message via Wi-Fi to the preset user mobile APP and cloud platform server, containing a timestamp, event type (Warning), and current residual current value (20mA). At this time, the electromagnetic trip device does not activate, and the power supply is unaffected, but management personnel can remotely learn of the early potential problem in the line, facilitating maintenance arrangements.

[0045] Trip Action Status: When a serious leakage or electric shock accident occurs and the residual current instantaneously exceeds 30mA (e.g., 50mA is detected), the MCU immediately makes a judgment. Its control process is as follows: (1) The corresponding GPIO port of the MCU outputs a high level, turns on the MOSFET, and loads the DC 12V voltage onto the control coil of the electromagnetic trip unit; (2) The electromagnetic trip unit generates a strong magnetic force when energized, drives the mechanical mechanism to move, quickly disconnects the normally closed main contact, and cuts off the main circuit power supply; (3) At the same time, another GPIO port of the MCU outputs a high level, drives the sound and light alarm to emit a strong audio-visual alarm, and reminds the on-site personnel; (4) The MCU sends an alarm message containing "trip action (Trip)", the final current value (50mA) and a timestamp to the remote platform through the Wi-Fi module.

[0046] System self-test: This invention also features a periodic self-test function that can be set via software. The MCU can periodically (e.g., monthly) generate a small test signal through a DAC or PWM port, inputting it to the front end of the signal conditioning circuit to simulate residual current. If the system can normally acquire this signal and trigger an early warning report (without triggering tripping), it indicates that the system is functioning normally.

[0047] As can be seen from the above embodiments, this system, through specific component selection and hardware-software coordination, supports all the technical features of the claims, effectively solves the technical problems mentioned in the background art such as slow response, single function, and inability to be remotely managed, and provides a truly intelligent building electrical leakage prevention solution with preventive maintenance capabilities.

[0048] In summary, this utility model's intelligent building electrical leakage prevention system, through the deep integration of an intelligent detection and control module with a multi-level threshold algorithm, wireless communication technology, and an execution module, achieves a leap from traditional passive protection to proactive prevention, significantly improving the intelligence level and reliability of building electrical safety management. Its reasonable structural design, component selection that balances performance and economy, and stable and efficient workflow make it widely applicable to electrical safety protection in various civil buildings, commercial complexes, and industrial sites, possessing significant promotional value and practical significance.

[0049] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A building electrical intelligent leakage prevention system, characterized in that, It consists of a main circuit module, an intelligent detection and control module, an execution module, and a power supply module. The live and neutral wires of the main circuit module pass through a current transformer; the intelligent detection and control module is electrically connected to the signal output terminal of the current transformer for real-time acquisition and processing of current signals. The intelligent detection and control module includes a microcontroller unit and a signal conditioning circuit electrically connected to the microcontroller unit; the execution module includes a normally closed electromagnetic trip unit, the control coil of which is electrically connected to the control output terminal of the intelligent detection and control module; the power supply module supplies power to the intelligent detection and control module and the execution module. The intelligent detection and control module receives the signal from the current transformer, and after processing the signal, determines that the residual current value exceeds the first threshold set in the microcontroller unit. Then, it sends a drive signal to the execution module through its control output terminal to drive the electromagnetic trip unit to operate and disconnect the main circuit.

2. The intelligent building electrical leakage prevention system according to claim 1, characterized in that, The intelligent detection and control module also includes a wireless communication unit, which is electrically connected to the microcontroller unit and is used to remotely send leakage alarm information, residual current value, and tripping action status to the user terminal and cloud platform.

3. The intelligent building electrical leakage prevention system according to claim 2, characterized in that, The wireless communication unit is one of the following: Wi-Fi module, Bluetooth module, 4 / 5G module, and NB-IoT module.

4. The intelligent building electrical leakage prevention system according to claim 1, characterized in that, The execution module also includes an audible and visual alarm, which is electrically connected to the alarm output terminal of the intelligent detection and control module. When leakage occurs, the microcontroller unit drives the audible and visual alarm to issue an alarm while driving the electromagnetic trip unit.

5. The intelligent building electrical leakage prevention system according to claim 1, characterized in that, The current transformer is a high-sensitivity zero-sequence current transformer.

6. The intelligent building electrical leakage prevention system according to claim 1, characterized in that, The power module is a switching power supply circuit, and its input terminal is connected in parallel between the live wire and the neutral wire of the main circuit module.

7. The intelligent building electrical leakage prevention system according to claim 1, characterized in that, The signal conditioning circuit includes a filter circuit and an operational amplifier circuit, which are used to filter and amplify the signal collected by the current transformer before transmitting it to the microcontroller unit.

8. The intelligent building electrical leakage prevention system according to claim 1, characterized in that, The microcontroller unit is configured with a second threshold value that is less than the first threshold value. When the residual current value exceeds the second threshold value but does not reach the first threshold value, the microcontroller unit sends a warning message through its communication unit without driving the electromagnetic trip unit to operate.

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