Power distribution cabinet power failure detection system with SMS automatic alarm function

Abstract

The present invention relates to a power-off detection system for a power distribution cabinet with an automatic SMS alarm function, and belongs to the field of electrical power distribution cabinets. The power-off detection module of the present invention is connected to the working circuit of the power distribution cabinet through an AC-DC conversion circuit and a resistor voltage divider network. When the low level on the probe is detected by the ADC of the microcontroller after the power distribution cabinet is powered off, the microcontroller obtains the current time from the real-time clock module, and then sends the power-off time, location and other information to a preset telephone number in the form of a text message. When the power distribution cabinet is working normally, the power management module is in a charging state, and is used to provide working power for the entire system when the power is off. The display module is used to display basic information such as the system working status. The Ethernet interface and the RS232 interface are for the user to conveniently reset the system, set basic parameters, and download and update firmware. The power-off detection device for the power distribution cabinet of the present invention has the characteristics of no need for manual intervention, comprehensive and fast alarm information, etc., and has broad application prospects in the field of power distribution cabinets in the electrical industry.

Description

Technical Field

[0001] The invention relates to a power failure detection system for a power distribution cabinet with an automatic SMS alarm function, belonging to the technical field of power failure detection for power distribution cabinets. Background Art

[0002] In recent years, the application of industrial detection technology based on the Internet of Things has become more and more extensive. As an important technology in production and life, the power-on and power-off detection of the distribution cabinet in the electrical industry can be more convenient and intelligent when equipped with the Internet of Things. The current management of distribution cabinets has the following problems: First, according to the national standard for power distribution, a distribution room is required within a radius of 500m, so there are a large number of distribution cabinets, which makes manual management difficult. Second, the cycle from the user's complaint call to the maintenance personnel to the on-site maintenance is long, and there are many wrong user complaint information. Third, due to the large number of distribution cabinets, high technical difficulty, high investment cost, and heavy workload of maintenance personnel, the operation and maintenance costs are high. At present, only the larger distribution stations in the power system have the function of uploading power failure alarm information in their monitoring centers, while the smaller distribution cabinets are not equipped. In order to improve the management efficiency of the distribution cabinet and reduce its operation and maintenance costs, the work of developing a power failure intelligent detection and alarm system for the distribution cabinet is of great practical significance.

[0003] The traditional power outage detection technology of distribution cabinets is that the equipment will issue a local sound and light alarm after detecting the power outage information. The information cannot be sent to the remote monitoring center and must be checked on site by staff. The local sound and light alarm provides certain convenience for determining the power outage location, but the efficiency is still low. If the equipment is abnormal and detects the power outage information but cannot issue a sound and light alarm, it will also cause trouble for the operation and maintenance personnel to detect the equipment. Summary of the invention

[0004] The purpose of the present invention is to solve the problem that the information such as the power outage time and location after the power distribution cabinet is powered off cannot be quickly captured, so as to improve the management efficiency of the power distribution cabinet and provide a power distribution cabinet power outage detection system with an automatic SMS alarm function.

[0005] The power distribution cabinet power failure detection system with SMS automatic alarm function of the present invention comprises a microcontroller module, a power failure detection module, a GSM module, a display module, a power management module, a control and firmware upgrade module, a real-time clock module and a storage module.

[0006] The power failure detection module is used to monitor the power on / off status of the power distribution cabinet in real time, and transmit the information to the microcontroller module in real time. The microcontroller module controls the display module to display the basic working status information of the power distribution cabinet.

[0007] The GSM module receives information such as time, location, phone number, etc. from the microcontroller module and sends it to the user's preset phone number in the form of text messages. At the same time, the module can receive text messages with a specific message format, parse the text messages, and change the preset alarm phone number according to the text messages.

[0008] The power management module is mainly composed of a lithium battery and a voltage stabilizing circuit. It serves as a backup power source for the entire system when the power distribution cabinet is powered off, providing the basic conditions for the normal alarm of the system.

[0009] The present invention contains a storage module, the storage function of which is realized by an SD card, which will store basic information of the system configuration. In addition, the microcontroller module will periodically store the system status in a specific file of the storage module, so that when the equipment is damaged or abnormal, the equipment maintenance personnel can refer to the content in the file to obtain the historical working information of the distribution cabinet.

[0010] The present invention comprises a control and firmware upgrade module, which enables the user to view and modify information through an Ethernet interface or an RS232 interface, and to download and upgrade the firmware, so that the upgrade and update of the system is more convenient.

[0011] The present invention can not only perform power failure alarm through the GSM module, but also automatically send a report to the monitoring center after the power distribution cabinet returns to normal power supply state from the power failure state, which reduces the operation and maintenance workload and effectively improves the management efficiency of the power distribution cabinet.

[0012] Advantages of the present invention: In view of the large number of distribution cabinets, the difficulty in management, and the inability of traditional distribution cabinet alarm systems to quickly capture power outage information, the present invention adopts a distribution cabinet power outage detection system with an automatic SMS alarm function. It collects power-on and power-off information of the distribution cabinet under the control of the microcontroller module, displays the working status information of the distribution cabinet based on the collected information, and then sends the power outage information to the monitoring center in the form of SMS through the GSM module. When the power supply of the distribution cabinet is restored, the GSM module will send the information that the power supply of the distribution cabinet is restored again. The above-mentioned distribution cabinet power outage detection equipment has the characteristics of no need for manual intervention, comprehensive and fast alarm information, etc., and has broad application prospects in the field of distribution cabinets in the electrical industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural block diagram of the power failure detection system of the power distribution cabinet with the SMS automatic alarm function of the present invention;

[0014] Figure 2 It is a schematic diagram of the power failure detection module;

[0015] Figure 3 It is a schematic diagram of the LED display module;

[0016] Figure 4 It is the workflow diagram of the control and firmware upgrade module;

[0017] Figure 5 This is the working flow chart of power failure alarm. DETAILED DESCRIPTION

[0018] Specific implementation method 1: The following is combined Figures 1 to 5 The present embodiment is described. The power distribution cabinet power failure detection system with SMS automatic alarm function described in the present embodiment comprises a microcontroller module 1, a power failure detection module 2, a display module 3, a power management module 4, a GSM module 5, a control and firmware upgrade module 6, a real-time clock module 7 and a storage module 8, as shown in the attached Figure 1 shown.

[0019] The power failure detection module 2 is composed of AC-DC and voltage divider network. The AC-DC is connected to the strong power AC interface of the power distribution cabinet to detect the strong power on and off information of the power distribution cabinet. The microcontroller module 1 periodically collects the output signal of the voltage divider network through the ADC and displays the current working status of the power distribution cabinet through the display module 3. The composition diagram of the power failure detection module is shown in the attached figure. Figure 2 shown.

[0020] The GSM module consists of a UART interface, a radio frequency chip, a power amplifier and an antenna, and its interface with the microcontroller is a serial port UART. Therefore, for the microcontroller, the GSM module is just a serial interface device. When initializing the entire system, you only need to initialize its serial port device controller, and then initialize the configuration mode of the GSM module through AT commands.

[0021] When the microcontroller detects a power outage, it sends the time and location of the power outage in the form of a data packet to the GSM module through the UART interface and initiates a text message sending action, thereby sending the power outage information to the preset phone number, thus realizing an alarm operation.

[0022] The GSM module receives the information such as the power-off time and location from the microcontroller module 1, and sends it to the user's preset phone number in the form of a text message. At the same time, the GSM module can also receive text messages from other phone numbers. The user can set and change the alarm phone number in this way. After receiving the text message, this module will parse the data format of the text message and extract the control command and parameters to achieve the change. In order to facilitate the user to set and change the alarm phone, the user can send a text message with a specific format to the GSM module. If you want to change the alarm phone to 123456789, you only need to edit the text message SetAlarmPhoneNumber+123456789 and send it to the phone number of the GSM module. After the GSM module receives the text message, it will be sent to the microcontroller module through the serial port. The microcontroller module then parses the commands and parameters of the text message data, then updates the alarm phone, and writes the alarm phone to the phonenumber.txt of the SD card.

[0023] The power management module 4 includes a lithium battery and a voltage stabilizing circuit, and is used to supply power to the detection equipment when the power distribution cabinet is powered off.

[0024] The display module 3 of the present invention is used to display the working status information of the system. It is composed of 3 LEDs and 3 7-segment digital tubes. Figure 3 As shown. Three digital tubes are used to display the power of the lithium battery as a backup power source after the power distribution cabinet is powered off. The remaining three LEDs, LED1, are used to indicate the system power supply status. If it is always on, it means the power is normal. LED2 flashes with a period of 1s, indicating that the microcontroller module 1 is working normally. LED3 is used to indicate the communication status of the GSM module. When the microcontroller module 1 is transmitting data with the GSM module 5, it will flash periodically, and it will not light up when there is no communication.

[0025] The real-time clock module 7 of the present invention is used to provide the time management function of the entire system. When the system is reset, it will start timing from the starting time point set by the program. In order to enable it to work for a long time, a button battery equipped for it is used to provide power after the power distribution cabinet is powered off. The module adopts a DS1302 chip, and the communication interface between the chip and the microcontroller module 1 is SPI. The microcontroller module 1 reads the time information of the module after the power distribution cabinet is powered off, integrates the read information with the location information, and then sends it to the GSM module 5.

[0026] The storage module of the present invention is realized by an SD card, and the microcontroller module will periodically write the information of the power distribution cabinet into its statuslog.txt. When the detection alarm device is abnormal and needs to be repaired, the user can obtain the historical working status of the system through this file.

[0027] In this embodiment, the invention includes a control and firmware upgrade module 6, the function of which is to view and modify system configuration information, software reset system and download upgrade firmware through the reserved RS232 interface or RJ45 interface. The working process is as shown in the attached figure. Figure 4 As shown. Taking RS232 as an example, the user only needs to use a serial port line to connect the RS232 interface of the detection alarm device to the local PC, and then operate it through the serial terminal software. Enter help to obtain all the commands supported by the system, such as date can display the time information of the real-time clock module, and the date-s yymmddhhmmss command can calibrate the time information of the real-time clock module; nodeinfo can display the number and location of the current distribution cabinet, while nodeinfo-i can set the node number of the distribution cabinet, and nodeinfo-l can set the location of the distribution cabinet; reset can reset the entire system through software; updatefw can download the firmware program from the host computer through the serial port. When executing this command, the device will temporarily stop working and wait for the host computer to send the firmware file. After receiving and verifying successfully, it will erase the Flash in the microcontroller module and write the new firmware. Finally, the system will automatically restart and load the new firmware. Taking the Ethernet interface as an example, the user only needs to use a network cable to connect the detection alarm device to the local PC, or connect the local PC to the LAN where the detection alarm device is located, and then communicate with the device through the network debugging terminal on the local PC. The terminal operation commands based on the Ethernet interface and the operation commands based on the RS232 serial port terminal are the same, so they will not be repeated here.

[0028] Microcontroller module 1 uses high-speed and low-power LPC1114, which is a 32-bit microcontroller with ARMCortex-M0 core launched by NXP. Its main frequency can reach up to 50MHz, and it has an internal integrated clock generation unit, which can work without an external crystal oscillator. The microcontroller has an internal integrated 32KB Flash program memory, which can be used to store firmware programs, a UART can realize the above-mentioned serial port terminal, two SPI interfaces with SSP features can communicate with the real-time clock module DS1302, a watchdog timer with window function can monitor the operating status of the system, and the power management module will effectively reduce the power consumption of the system. 42 GPIOs can be used to detect the power-on and power-off status of multi-channel distribution cabinets.

[0029] The working process of the microcontroller module in the present invention is shown in the attached figure. Figure 5Because the breakpoint detection module of the power distribution cabinet is connected to GPIO, the microcontroller module can determine the power-on and power-off status of the power distribution cabinet by detecting the GPIO level. If the power distribution cabinet is detected to be powered off, the time information of the real-time clock module DS1302 is read through the SPI controller, and the time information is combined with the number and node location information of the power distribution cabinet, and sent to the GSM module through the UART controller. When the GSM module receives a text message, the microcontroller receives the text message through the UART receive interrupt, and then parses and updates the information. In addition, the microcontroller will periodically read the power distribution cabinet information through the timer interrupt, and write the information to statuslog.txt through the file system mounted on the SD card for query.

[0030] The above are only preferred specific embodiments of the present invention, which are all different implementations based on the overall concept of the present invention, and the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A power outage detection system for a power distribution cabinet with an automatic SMS alarm function, characterized in that: It includes a microcontroller module (1), a power failure detection module (2), a display module (3), a power management module (4), a GSM module (5), a control and firmware upgrade module (6), a real-time clock module (7) and a storage module (8). The power failure detection module (2) is used to detect the power-on and power-off status of the power distribution cabinet. When the microcontroller module (1) detects that the output of the voltage-dividing network of the power failure detection module (2) is at a low level, the microcontroller module (1) reads the real-time clock module (7), and the microcontroller module (1) delivers the power failure time and location information to the GSM module (5), and the GSM module (5) sends it to a preset telephone number in the form of a text message; the display module (3) receives the information from the microcontroller module (1) and displays the basic working status information of the system; The power management module (4) is in a charging state when the power distribution cabinet is working normally, and provides energy for the entire system when the power distribution cabinet is powered off; the control and firmware upgrade module (6) is used to allow users to view and set system information and download and update firmware, and the control and firmware upgrade module (6) is connected to the interface of the microcontroller module (1); the storage module (8) stores system setting information and historical working status information received from the microcontroller module (1) in the form of files; The power failure detection module (2) is composed of an AC-DC circuit and a voltage divider network. The AC-DC circuit outputs a voltage DC signal according to the strong AC signal of the power distribution cabinet, and then the voltage divider network converts the low-voltage signal into a compatible level of the microcontroller module (1) for the microcontroller to collect through ADC; The GSM module (5) is composed of a UART interface, a GSM radio frequency chip, a memory and a power amplifier device, has an independent operating system, receives power-off information and control information from the microcontroller module (1), and sends and receives text messages; The GSM module (5) can send power failure status information to a preset phone number, and can also set an alarm number by receiving a text message in a specific format; The power management module (4) is composed of a lithium battery and a voltage stabilizing circuit. When the power distribution cabinet is working normally, the lithium battery is in a charging mode; when the power distribution cabinet is powered off, it will continue to provide energy for the entire alarm system as a backup power source.

2. A power distribution cabinet power failure detection system with SMS automatic alarm function according to claim 1, characterized in that: The control and firmware upgrade module (6) has two external interfaces: an Ethernet RJ45 interface and an RS232 interface, which are used for users to control the system.

3. A power distribution cabinet power failure detection system with SMS automatic alarm function according to claim 1, characterized in that: The system uses a real-time clock module (7) for time management, which is powered by a button cell and a lithium battery.

4. A power outage detection system for a power distribution cabinet with an automatic SMS alarm function according to claim 1, characterized in that: Every time the system detects a change in the power-on / off state of the power distribution cabinet, the system will write the information into the storage module (8) to prevent the GSM module (5) from abnormality, thereby providing more reference data when manually troubleshooting.

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