Intelligent current monitor based on NB-IoT

Abstract

The utility model discloses an intelligent current monitor based on NB-IoT (Narrow Band Internet of Things) in the technical field of current monitors, which comprises a working and state indicating lamp area, a shell, a current transformer, a peripheral current sampling circuit, an electric quantity metering chip, an NB-IOT module and a battery and power supply management circuit, the battery and power supply management circuit is electrically connected with the peripheral current sampling circuit, the electric quantity metering chip and the NB-IOT module, the peripheral current sampling circuit is in signal connection with the electric quantity metering chip, the electric quantity metering chip is in signal connection with the NB-IOT module, through the built-in rechargeable battery, field installation and use are facilitated, meanwhile, an external power supply is also supported, and the NB-IOT module is convenient to use. 24-hour uninterrupted current and alarm information reporting is realized; data are reported through NB-Iot, parameters are remotely updated and reported, the real-time performance is high, and use is convenient; and a current analysis and strategy processing algorithm is arranged inside, so that real-time feedback and alarm can be carried out on working abnormity and other states of the to-be-monitored equipment.

Description

Technical Field

[0001] The utility model relates to the technical field of current monitors, and in particular to an intelligent current monitor based on NB-IoT. Background Art

[0002] Current monitors are mostly used in situations where the current in a line changes a lot. By installing a current monitor, it is convenient for workers to conduct current detection at long distances on the same line. Therefore, the current monitor needs to be able to transmit data over long distances. However, existing current monitors have the following defects and shortcomings: 1. The current data generated by traditional current monitors can only be displayed and stored on-site; 2. Traditional current monitors do not have remote monitoring and alarm functions; 3. Traditional current monitors do not have intelligent analysis and strategy processing functions, and cannot meet the needs of increasingly intelligent control. Based on this, the utility model designs an NB-IoT-based intelligent current monitor to solve the above problems. Utility Model Content

[0003] The purpose of the utility model is to provide an intelligent current monitor based on NB-IoT to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an intelligent current monitor based on NB-IoT, comprising a working and status indicator light area, a shell, a current transformer, a peripheral current sampling circuit, a power metering chip, an NB-IOT module, and a battery and power management circuit. The working and status indicator light area is embedded and installed behind the upper surface of the shell, and the peripheral current sampling circuit, the power metering chip, the NB-IOT module, and the battery and power management circuit are installed in the inner cavity of the shell. The current transformer is connected to the peripheral current sampling circuit through a signal line passing through the front surface of the shell. The NB-IOT antenna of the NB-IOT module is placed on the side of the shell. The battery and power management circuit is electrically connected to the peripheral current sampling circuit, the power metering chip, and the NB-IOT module. The peripheral current sampling circuit signal is connected to the power metering chip, and the power metering chip signal is connected to the NB-IOT module.

[0005] Preferably, the peripheral current sampling circuit includes a post-stage circuit consisting of a J601 terminal and resistors R601, R602, R603 and R604 and capacitors C601 and C604.

[0006] Preferably, the power metering chip is chip U601, and its model is: RN7032.

[0007] Preferably, the NB-IOT module adopts the CLM920_YV9 chip and its loading circuit.

[0008] Preferably, the NB-IOT module is connected to the SPI interface signal of the chip U601.

[0009] Preferably, the battery and power management circuit includes J603 and J501 terminals and a JW5018SOTB#TRPBF chip and its loading circuit.

[0010] Compared with the prior art, the utility model has the following beneficial effects: the utility model is an intelligent current monitor based on NB-IoT communication technology. The monitor is integrated with a dedicated chip for energy metering. The current mutual inductance sensor at the front end can realize real-time collection of the working current of the equipment. After collection, the digital conversion is completed and transmitted to the NB-IoT module for communication. The module analyzes, judges and processes the current data. According to the set strategy, the parameters such as whether the current data is reported and the reporting frequency can be automatically adapted. After that, it is transmitted to the management platform through the NB-IoT network for further data analysis, storage and viewing. At the same time, there is a rechargeable battery in the product, and the battery can be charged through a standard USB cable, which is convenient for installation and monitoring in various application scenarios. With its own rechargeable battery, it is convenient for on-site installation and use. At the same time, it also supports external power supply to realize 24-hour uninterrupted current and alarm information reporting; through NB-Iot reporting data and remote update reporting parameters, it has high real-time performance and is easy to use; and the internal built-in current analysis and strategy processing algorithm can provide real-time feedback and alarm for abnormal working conditions of the monitored equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0012] Figure 1 It is a schematic diagram of the structure of the utility model;

[0013] Figure 2 This is the principle block diagram of the utility model;

[0014] Figure 3 This is the working and status indicator light control circuit diagram of the utility model;

[0015] Figure 4 This is the utility model power metering chip and its loading circuit diagram;

[0016] Figure 5 This is the circuit diagram of the NB-IOT module of the utility model;

[0017] Figure 6This is the battery and power management circuit diagram of the utility model.

[0018] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0019] Working and status indicator light area 1, housing 2, current transformer 3, peripheral current sampling circuit 4, power metering chip 5, NB-IOT module 6, battery and power management circuit 7. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0022] See also Figure 1-3 The utility model provides a technical solution: an intelligent current monitor based on NB-IoT, including a working and status indicator light area 1, a shell 2, a current transformer 3, a peripheral current sampling circuit 4, a power metering chip 5, a NB-IOT module 6 and a battery and power management circuit 7. The working and status indicator light area 1 is embedded and installed behind the upper surface of the shell 2, the peripheral current sampling circuit 4, the power metering chip 5, the NB-IOT module 6 and the battery and power management circuit 7 are installed in the inner cavity of the shell 2, the current transformer 3 is connected to the peripheral current sampling circuit 4 through a signal line passing through the front surface of the shell 2, the NB-IOT antenna of the NB-IOT module 6 is placed on the side of the shell 2, the battery and power management circuit 7 is electrically connected to the peripheral current sampling circuit 4, the power metering chip 5 and the NB-IOT module 6, the peripheral current sampling circuit 4 signal is connected to the power metering chip 5, and the power metering chip 5 signal is connected to the NB-IOT module 6, wherein the chip U201 is used to control the working and status indicator light area 1.

[0023] See also Figure 4The peripheral current sampling circuit 4 includes a J601 terminal and a post-stage circuit composed of resistors R601, R602, R603 and R604 and capacitors C601 and C604, wherein the power metering chip 5 is a chip U601, whose model is: RN7032. The wire of the current to be measured passes through the current transformer 3 at the front end, and the current transformer 3 is connected to the J601 terminal. When current passes through the wire, it converts the current in proportion and inputs it into the post-stage circuit composed of resistors R601, R602, R603 and R604 and capacitors C601 and C604. The post-stage circuit converts the current into a voltage signal through the sampling resistor and then enters the chip U601 for sampling, signal conversion and processing.

[0024] See also Figure 5 , the NB-IOT module 6 adopts the CLM920_YV9 chip and its loading circuit, wherein the NB-IOT module 6 is connected to the SPI interface signal of the chip U601, specifically: the processed digital voltage signal is sent to the CLM920_YV9 chip (i.e., U301) of the NB-IoT module 6 through the SPI interface of the chip U601 for reporting. When the threshold set by the management background is exceeded, the NB-IoT module 6 will also automatically report an alarm signal. Since the device is powered by a battery, the device automatically enters sleep after each report, and waits for the next reporting cycle to arrive, and then automatically wakes up the front-end power metering chip 5 to sample and report the current in real time, and then repeats the cycle according to the set parameters for timing work.

[0025] See also Figure 6 The battery and power management circuit 7 includes J603 and J501 terminals and a JW5018SOTB#TRPBF chip and its loading circuit. The system is powered by a built-in rechargeable battery. The power supply can be input through the J603 and J501 terminals, and the voltage supports 5V and 12V voltage input. In addition, there is a button J304 (which is set on the surface of the housing 2) for connecting the rechargeable battery. When the user presses it, the current signal collection and reporting can be manually triggered.

[0026] The working status of the equipment is indicated by the working and status indicator area 1. When the current collection data is reported, the working and status indicator area 1 is long on; when the network connection is successful, the working and status indicator area 1 flashes slowly for 5 seconds, and when the network connection is unsuccessful, the working and status indicator area 1 flashes quickly for 1 second.

[0027] Working principle: After the power is turned on, the device enters the normal working state after completing the initialization under the control of the program loaded by the chip U201 itself. The device will monitor, analyze and process the current of the device under test in real time according to the default setting parameters, and actively report the current data and alarm information according to the rules and strategies loaded in the internal software settings. After the reporting is completed, it enters the sleep state to save battery power, and then wakes up at regular intervals to sample the current of the monitoring device. When it is found that the current value exceeds the set threshold, the current data and alarm are reported in time; if there is an external charging power supply, the device can also enter the online real-time monitoring, and sample and report the current of the device under test for 24 hours. After power-on, if it is detected that it is battery-powered, it is usually in sleep mode, and then actively reports according to the set time interval and set threshold; NB-IoT module 6 and power metering chip 5 communicate through the serial port; the internal battery can be powered by an external power supply. In this state, the device can choose to perform 24-hour real-time monitoring mode to continuously monitor and report the current of the device under test.

[0028] It is worth noting that the control program used by the chip is a currently commonly used control program, that is, a prior art, so it will not be described in detail here.

[0029] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0030] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. An intelligent current monitor based on NB-IoT, comprising a working and status indicator light area (1), a housing (2), a current transformer (3), a peripheral current sampling circuit (4), an electric quantity metering chip (5), an NB-IOT module (6) and a battery and power management circuit (7), characterized in that: The working and status indicator light area (1) is embedded and installed behind the upper surface of the housing (2); the peripheral current sampling circuit (4), the power metering chip (5), the NB-IOT module (6) and the battery and power management circuit (7) are installed in the inner cavity of the housing (2); the current transformer (3) is connected to the peripheral current sampling circuit (4) through a signal line passing through the front surface of the housing (2); the NB-IOT antenna of the NB-IOT module (6) is placed on the side of the housing (2); the battery and power management circuit (7) is electrically connected to the peripheral current sampling circuit (4), the power metering chip (5) and the NB-IOT module (6); the peripheral current sampling circuit (4) is signal-connected to the power metering chip (5); and the power metering chip (5) is signal-connected to the NB-IOT module (6).

2. The NB-IoT-based intelligent current monitor according to claim 1, characterized in that: The peripheral current sampling circuit (4) comprises a post-stage circuit consisting of a J601 terminal and resistors R601, R602, R603 and R604 and capacitors C601 and C604.

3. The NB-IoT-based intelligent current monitor according to claim 1, characterized in that: The electricity metering chip (5) is a chip U601, and its model is: RN7032.

4. The NB-IoT-based intelligent current monitor according to claim 1, characterized in that: The NB-IOT module (6) adopts a CLM920_YV9 chip and a loading circuit thereof.

5. The NB-IoT-based intelligent current monitor according to claim 3, characterized in that: The NB-IOT module (6) is connected to the SPI interface signal of the chip U601.

6. The NB-IoT-based intelligent current monitor according to claim 1, characterized in that: The battery and power management circuit (7) comprises J603 and J501 terminals and a JW5018SOTB#TRPBF chip and its loading circuit.

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