4G communication module supporting GNSS (Global Navigation Satellite System) positioning and power failure and recovery reporting

Abstract

The utility model relates to a 4G communication module supporting GNSS positioning and power failure and recovery reporting. The 4G communication module comprises a BUCK step-down circuit, an LDO circuit, a charging control circuit, a BOOST circuit, a power failure detection circuit, a 4G + GNSS communication module circuit and an MCU processor. The input end of the BUCK step-down circuit is connected with the 12V power supply of the intelligent electric meter and the output power supply end of the BOOST circuit, and the output end of the BUCK step-down circuit is electrically connected with the 4G + GNSS communication module and the MCU processor; and the input end of the BOOST circuit is electrically connected with the super capacitor. The device is reasonable in design, compact in structure and convenient to use.

Description

Technical Field

[0001] The utility model relates to a 4G communication module supporting GNSS positioning and power outage and restoration reporting, and is suitable for various application occasions where power system equipment needs to have a positioning function and power outage reporting is required for battery life when the equipment loses power. Background Art

[0002] The lack of accurate timing and positioning functions in traditional power system equipment has seriously affected the overall performance of the power system. The three-dimensional positioning technology used by GNSS technology can measure the positions of all equipment in the power system, ensuring the efficiency and accuracy of the power system's automated operation, and providing reliable protection for the normal operation of the power system. Traditional power system equipment monitoring usually relies on on-site operations by staff, and errors will inevitably occur in information collection and processing. Deviations in information data will have a great impact on the normal operation of the power system. The application of GNSS technology has realized all-round, multi-point, and high-precision measurements, and can accurately and uniformly measure each device and the entire power system, ensuring the accuracy and authenticity of the power system's automated information collection.

[0003] The 4G communication modules of most electricity meter manufacturers do not support GNSS positioning function.

[0004] The GNSS clock synchronization system plays an important role in the smart grid. It can provide precise time information, achieve accuracy and timeliness of power dispatching, and improve the efficiency and quality of power transmission and distribution.

[0005] Based on the advantages of GNSS positioning function in the application of power system and the fact that most manufacturers' communication modules do not support GNSS positioning function, the utility model designs a 4G communication module that supports GNSS positioning and power outage and restoration reporting, which solves the problem that the communication module does not support GNSS positioning. The module also has the following advantages: it can support mainstream operators in various countries, and 7 modes and 16 frequencies can provide stronger network compatibility; the wireless transmission rate can reach up to 10Mbps in downlink and 5Mbps in uplink; the 4G communication module adopts a high-performance MCU processor and a built-in GNSS chip, supports GNSS positioning, and has powerful functions; the module adopts a 6-24V wide voltage design, supports remote configuration and firmware upgrades, is simple and convenient to use, and allows the device to easily achieve wireless connection with the Internet; GNSS technology can provide high-precision timing and positioning services for power system equipment, making it widely used in power automation systems. Utility Model Content

[0006] The technical problem to be solved by the present invention is generally to provide a 4G communication module that supports GNSS positioning and power outage and restoration reporting, and specifically relates to a 4G communication module that supports GNSS positioning and power outage and restoration reporting, which is suitable for remote communication occasions of power system equipment such as smart meters that require GNSS positioning and 4G remote communication.

[0007] In order to solve the above problems, the technical solution adopted by the utility model is:

[0008] A 4G communication module supporting GNSS positioning and power outage and restoration reporting, including a BUCK step-down circuit, an LDO circuit, a charging control circuit, a BOOST step-up circuit, a power outage detection circuit, a 4G+GNSS communication module circuit, and an MCU processor;

[0009] The input end of the BUCK step-down circuit is respectively connected to the 12V power supply of the smart meter and the output power supply end of the BOOST step-up circuit, and the output end of the BUCK step-down circuit is respectively electrically connected to the 4G+GNSS communication module and the MCU processor;

[0010] The input end of the BOOST boost circuit is electrically connected to a super capacitor;

[0011] The LDO circuit includes an LDO-3V circuit, the input end of the LDO-3V circuit is connected to the 12V power supply through an anti-reverse diode D1, and the output end of the LDO-3V circuit is respectively connected to the input end of the charging control circuit and the 2-pin enable end resistor R1 of the BUCK step-down circuit;

[0012] The charging control circuit is connected to the input end of the super capacitor and the BOOST boost circuit in sequence, and is also connected to the I / O port of the MCU processor. The MCU controls the charging control circuit;

[0013] The power failure detection circuit has an input end electrically connected to a 12V power supply and an output end connected to an I / O port of the MCU processor.

[0014] As a further improvement of the above technical solution:

[0015] The MCU processor is electrically connected to the peripheral circuit; the output end of the BUCK step-down circuit is connected to the power supply LDO-3.3V input end of the peripheral circuit.

[0016] The communication interface of the MCU processor and the smart meter and the communication interface of the 4G+GNSS communication module are respectively connected through a level conversion circuit.

[0017] The peripheral circuit includes a FLASH storage circuit, an LED indicator circuit, and a temperature detection circuit which are electrically connected to the MCU processor respectively.

[0018] The 4G+GNSS communication module is electrically connected to the SIM card circuit via three communication interfaces.

[0019] The UART communication interface is used for data exchange between the 4G+GNSS communication module and the smart meter.

[0020] The 4G+GNSS communication module has a built-in GNSS positioning chip and is connected to a GNSS active antenna via an IPEX-I connector;

[0021] The 4G+GNSS communication module has a built-in 4G chip and connects to a 4G antenna via an SMA connector to obtain GSM, FDD-LTE, and TDD-LTE network signals.

[0022] Working characteristics of supercapacitors. This utility model designs a supercapacitor charging control circuit. By setting the current limit, the charging current and charging speed of the supercapacitor are adjusted. It can not only charge in a safe state, but also avoid damaging the supercapacitor by overcurrent. According to the energy storage of supercapacitors, the BOOST boosting and energy release scheme is designed, so that the supercapacitor can still work normally at low voltage, release energy to the maximum extent, and control the output stable voltage to improve energy utilization. The supercapacitor charging and discharging control scheme in this module circuit not only realizes convenient control and strong operability, and meets the work of the load system for a certain period of time, but also has a power function, greatly improving the power supply reliability of the system. This design uses 4G network communication, and the data transmission is more stable and fast. The GNSS positioning module has faster positioning speed and higher accuracy.

[0023] The utility model has the advantages of reasonable design, low cost, firmness and durability, safety and reliability, simple operation, time-saving, labor-saving, money-saving, compact structure and convenient use. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a circuit diagram of the utility model. DETAILED DESCRIPTION

[0025] like Figure 1 As shown, the 4G communication module of this embodiment supports GNSS positioning and power outage and restoration reporting,

[0026] This design scheme uses GNSS positioning and power outage and restoration reporting functions to facilitate operation and maintenance personnel to judge and maintain faults in power system equipment such as smart meters; this design scheme uses GNSS positioning and 4G communication functions to improve the environmental adaptability and communication reliability of smart meters, allowing the meters to operate normally in more working environments. The power supply scheme circuit of this module can stably output the working voltage required by the load through the BOOST boost circuit when the voltage continues to decrease during the continuous discharge of the supercapacitor.

[0027] like Figure 1 , a 4G communication module supporting GNSS positioning and power outage and restoration reporting in this embodiment, the module circuit of this design includes: BUCK buck circuit, LDO circuit, charging control circuit, BOOST boost circuit, power outage detection circuit, level conversion circuit, 4G+GNSS communication module circuit, MCU processor and peripheral circuits, etc. It is based on the prior art disclosed by means of a capacitor charging circuit controllable by MCU, a supercapacitor charging and discharging management module based on a negative feedback current limiting circuit, etc., wherein the input end of the BUCK buck circuit is respectively connected to the 12V power supply of the smart meter and the output power supply end of the BOOST boost circuit, and the output end is respectively connected to the 4G+GNSS communication module and the LDO-3.3V input end for powering the MCU processor and the peripheral circuit; the input end of the LDO-3V circuit is connected to the 12V power supply through the anti-reverse diode D1, and the output end is respectively connected to the input end of the charging control circuit and the 2-pin enable end resistor R1 of the BUCK buck circuit. The charging control circuit is connected to the input of the supercapacitor and the BOOST boost circuit in turn, and is also connected to the I / O port of the MCU processor to accept MCU control; the power failure detection circuit has a 12V power supply as its input, and its output is connected to the I / O port of the MCU processor; the communication interface of the MCU processor and the communication interface of the 4G+GNSS communication module are connected through a level conversion circuit, and the peripheral circuit of the MCU processor includes a FLASH storage circuit, an LED indicator circuit, a temperature detection circuit, etc.; the 4G+GNSS communication module is connected to the SIM card circuit through three communication interfaces. The 4G communication module that supports GNSS positioning and power failure reporting relies on the power supply provided by the smart meter, and is powered by a pin interface in the form of DC. At the same time, when the smart meter loses power, the energy stored in the supercapacitor in the 4G module can maintain the power failure reporting of the 4G communication module for a period of time.

[0028] In this solution, the 4G communication module and the smart meter use the UART communication interface for data exchange; the emergency backup power supply is integrated in the communication module, which consists of a supercapacitor and a charge and discharge control circuit. When the 4G communication module is powered through the pin interface, it can also charge the supercapacitor; when the DC power supply port of the 4G communication module pin interface is powered off, the supercapacitor will power the MCU processor and the 4G+GNSS communication module circuit through the charge and discharge control circuit; when the MCU processor of the 4G communication module detects that the DC power supply port of the power outage detection circuit is powered off, it immediately enters a low-power working state and sends a power outage alarm event to the system master station through the 4G module. If the power supply of the pin interface is restored after waking up, it will send a power recovery event and a power grid fluctuation alarm event to the system master station. The temperature detection circuit is integrated in the 4G communication module, and the MCU processor AD detection port regularly obtains the ambient temperature changes around the SIM card holder. When the temperature is higher than the alarm threshold, the alarm information will be sent to the system master station through the 4G communication module.

[0029] The 4G+GNSS communication module circuit, LED indicator circuit, and Flash storage circuit are all connected to the MCU processor; the SIM card circuit is electrically connected to the 4G+GNSS communication module. The module has a built-in GNSS positioning chip, which is connected to a GNSS active antenna through an IPEX-I connector. The module has a built-in 4G chip that is connected to a 4G antenna through an SMA connector to obtain GSM, FDD-LTE, and TDD-LTE network signals, and supports Wi-Fi positioning. After the supercapacitor is fully charged, when the power supply of the smart meter is cut off, the supercapacitor will power the module through the BOOST boost circuit, ensuring that the power-off information of the smart meter is reported in a timely manner.

[0030] like Figure 1 As shown, it is a principle block diagram of a 4G communication module that supports GNSS positioning and power outage and restoration reporting. When the module is connected to the 12V power supply of the electric meter, the 4G+GNSS module works normally through the 3.8V power supply output by the BUCK buck circuit, and at the same time, the 3.8V is supplied to the LDO chip U2 to output 3.3V to provide power to the MCU processor and peripheral circuits. The 12V power supply of the electric meter supplies the LDO chip U3 with an output of 3V to charge the supercapacitor through the charging control circuit. After the supercapacitor is charged to a certain voltage, the charging can be turned off by the CAP_EN control of the MCU processor; when the input power is cut off, the BOOST boost circuit starts to work and outputs a constant voltage of 6V to ensure that the core circuit of the module works for a certain period of time and timely feedbacks information such as power outage events. It is characterized by a controllable current limiting charging energy storage composed of a BUCK buck circuit, a charging control circuit, a supercapacitor circuit and a BOOST boost circuit, and an intelligent adjustment control scheme.

[0031] In summary, this design scheme facilitates the operation and maintenance staff to judge and maintain the faults of power system equipment such as smart meters through the 4G communication module that supports GNSS positioning and power outage and restoration reporting functions; through the 4G communication function, the environmental adaptability and communication reliability of equipment such as meters are improved, so that meters and other equipment can operate normally in more working environments. At the same time, it has the advantages of low power consumption, easy implementation, low cost, and high reliability.

[0032] In the embodiment, the GNSS receiver can be combined with the computer system by utilizing the precise timing and positioning functions of the GNSS technology to realize the automation of the patrol function of the field high-voltage transmission line. The GNSS technology can ensure that the accuracy of the UTC and the signal will not exceed 1uS, and it is not limited by the environmental and geographical conditions of the substation and power plant, so that it greatly improves the anti-interference ability and reliability of the power system device in terms of precise time synchronization measurement, detection and real-time monitoring, and has a high application value. In addition, the GNSS technology also has a self-reset function. When the power system equipment program fails due to the influence of the external environment, it can automatically restore to normal through online monitoring, ensuring the normal operation of the power automation system.

[0033] The present invention is fully described for a clearer disclosure, and the prior art will not be listed one by one.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it; although the utility model is described in detail with reference to the above embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above embodiments, or replace some of the technical features therein with equivalents; it is obvious for those skilled in the art to combine multiple technical solutions of the utility model. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model.

Claims

1. A 4G communication module supporting GNSS positioning and power outage and restoration reporting, characterized in that: Including BUCK step-down circuit, LDO circuit, charging control circuit, BOOST step-up circuit, power failure detection circuit, 4G+GNSS communication module circuit and MCU processor; The input end of the BUCK step-down circuit is respectively connected to the 12V power supply of the smart meter and the output power supply end of the BOOST step-up circuit, and the output end of the BUCK step-down circuit is respectively electrically connected to the 4G+GNSS communication module and the MCU processor; The input end of the BOOST boost circuit is electrically connected to a super capacitor; The LDO circuit includes an LDO-3V circuit, the input end of the LDO-3V circuit is connected to the 12V power supply through an anti-reverse diode D1, and the output end of the LDO-3V circuit is respectively connected to the input end of the charging control circuit and the 2-pin enable end resistor R1 of the BUCK step-down circuit; The charging control circuit is connected to the input end of the super capacitor and the BOOST boost circuit in sequence, and is also connected to the I / O port of the MCU processor. The MCU controls the charging control circuit; The power failure detection circuit has an input end electrically connected to a 12V power supply and an output end connected to an I / O port of the MCU processor.

2. The 4G communication module supporting GNSS positioning and power outage and restoration reporting according to claim 1, characterized in that: The MCU processor is electrically connected to the peripheral circuit; the output end of the BUCK step-down circuit is connected to the power supply LDO-3.3V input end of the peripheral circuit.

3. The 4G communication module supporting GNSS positioning and power outage and restoration reporting according to claim 2, characterized in that: The communication interface of the MCU processor and the smart meter and the communication interface of the 4G+GNSS communication module are respectively connected through a level conversion circuit.

4. The 4G communication module supporting GNSS positioning and power outage and restoration reporting according to claim 3, characterized in that: The peripheral circuit includes a FLASH storage circuit, an LED indicator circuit, and a temperature detection circuit which are electrically connected to the MCU processor respectively.

5. The 4G communication module supporting GNSS positioning and power outage and restoration reporting according to claim 4, characterized in that: The 4G+GNSS communication module is electrically connected to the SIM card circuit via three communication interfaces.

6. The 4G communication module supporting GNSS positioning and power outage and restoration reporting according to claim 5, characterized in that: The UART communication interface is used for data exchange between the 4G+GNSS communication module and the smart meter.

7. The 4G communication module supporting GNSS positioning and power outage and restoration reporting according to claim 3, characterized in that: The 4G+GNSS communication module has a built-in GNSS positioning chip and is connected to a GNSS active antenna via an IPEX-I connector; The 4G+GNSS communication module has a built-in 4G chip and connects to a 4G antenna via an SMA connector to obtain GSM, FDD-LTE, and TDD-LTE network signals.

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