Residual current monitoring device for low-voltage alternating-current power supply

Abstract

The utility model provides a residual current monitoring device for a low-voltage alternating current power supply. The residual current monitoring device comprises a Hall sensor, a single chip microcomputer and monitoring terminal equipment, the Hall sensor collects a first analog signal of a low-voltage alternating current power supply and outputs the first analog signal, the single chip microcomputer is connected with the Hall sensor and comprises an analog-to-digital conversion interface and a communication interface, and the analog-to-digital conversion interface and the communication interface are connected through serial communication; the analog-to-digital conversion interface receives a first analog signal output by the Hall sensor and converts the first analog signal into a first digital signal; the communication interface transmits the first analog signal, and the monitoring terminal device is connected with the single-chip microcomputer to receive a first digital signal transmitted by the single-chip microcomputer, display the first digital signal, set a threshold value based on the digital signal, obtain a second digital signal and output the second digital signal. According to the invention, the influence of external factors can be overcome, a high-accuracy measurement result is provided, and a wide monitoring area is covered.

Description

Technical Field

[0001] This disclosure relates to the field of current detection technology, and in particular to a residual current monitoring device for low-voltage AC power supplies. Background Technology

[0002] This section is intended to provide background or context for the embodiments of this disclosure as set forth in the claims. The description herein is not intended to be a prior art simply because it is included in this section.

[0003] Low-voltage AC power supply residual current monitoring technology involves long-term monitoring and data analysis of the residual current of low-voltage AC power supplies. This allows for early detection of trends in the residual current status of low-voltage AC power supplies, thereby preventing electrical fire risks.

[0004] However, in related technologies, external factors such as external magnetic field interference and electrical noise may affect the normal operation of the residual current sensor, resulting in inaccurate monitoring data or exceeding the expected measurement range. In addition, excessively long transmission time intervals during signal transmission can cause delays in the monitored data. Utility Model Content

[0005] In view of this, the purpose of this disclosure is to provide a low-voltage AC power supply residual current monitoring device, which at least partially solves one of the technical problems in the related art.

[0006] To achieve the above objectives, an exemplary embodiment of this disclosure provides a low-voltage AC power supply residual current monitoring device, comprising:

[0007] The Hall sensor is configured to acquire a first analog signal from a low-voltage AC power supply and output the first analog signal. The microcontroller is connected to the Hall sensor and includes an analog-to-digital converter (ADC) interface and a communication interface, which are connected via serial communication. The ADC interface is configured to receive the first analog signal output by the Hall sensor and convert it into a first digital signal. The communication interface is configured to transmit the first analog signal. The monitoring terminal device is connected to the microcontroller and configured to receive the first digital signal transmitted by the microcontroller, display the first digital signal, set a threshold based on the digital signal to obtain a second digital signal, and output the second digital signal. This disclosure can overcome the influence of external factors, provide highly accurate measurement results, and cover a wide monitoring area. Attached Figure Description

[0008] To more clearly illustrate the technical solutions in this disclosure or related technologies, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are only embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0009] Figure 1 A functional architecture diagram of a low-voltage AC power supply residual current monitoring device provided for an exemplary embodiment of this disclosure;

[0010] Figure 2 A schematic diagram of a Hall sensor working circuit for a low-voltage AC power supply residual current monitoring device provided as an exemplary embodiment of the present disclosure;

[0011] Figure 3 A schematic diagram of digital signal data transmission of a low-voltage AC power supply residual current monitoring device provided as an exemplary embodiment of the present disclosure;

[0012] Figure 4 A schematic diagram of signal transmission between a microcontroller and a monitoring terminal device in a low-voltage AC power supply residual current monitoring device provided for an exemplary embodiment of this disclosure;

[0013] Figure 5 A schematic diagram of a low-voltage AC power supply monitoring terminal device provided as an exemplary embodiment of this disclosure. Detailed Implementation

[0014] It is understood that before using the technical solutions disclosed in the various embodiments of this application, users should be informed of the types, scope of use, and usage scenarios of the personal information involved in this application in an appropriate manner in accordance with relevant laws and regulations, and user authorization should be obtained.

[0015] For example, upon receiving a user's active request, a prompt message is sent to the user to explicitly inform them that the requested operation will require the acquisition and use of the user's personal information. This allows the user to independently choose whether to provide personal information to the software or hardware, such as the electronic device, application, server, or storage medium performing the operations of this application's technical solution, based on the prompt message.

[0016] As an optional but non-limiting implementation, in response to a user's active request, sending a prompt message to the user can be done via a pop-up window, where the prompt message can be presented in text format. Furthermore, the pop-up window can also include a selection control allowing the user to choose "agree" or "disagree" to provide personal information to the electronic device.

[0017] It is understood that the above notification and user authorization process are merely illustrative and do not constitute a limitation on the implementation of this application. Other methods that comply with relevant laws and regulations may also be applied to the implementation of this application.

[0018] It is understood that the data involved in this technical solution (including but not limited to the data itself, the acquisition or use of the data) shall comply with the requirements of relevant laws, regulations and related provisions.

[0019] To make the objectives, technical solutions, and advantages of this disclosure clearer, the principles and spirit of this disclosure will be described below with reference to several exemplary embodiments. It should be understood that these embodiments are provided merely to enable those skilled in the art to better understand and implement this disclosure, and are not intended to limit the scope of this disclosure in any way. Rather, these embodiments are provided to make this disclosure more thorough and complete, and to fully convey the scope of this disclosure to those skilled in the art.

[0020] In this article, it is important to understand that any number of elements in the accompanying figures is for illustrative purposes and not for limitation, and any naming is for distinction only and has no limiting meaning.

[0021] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this disclosure should have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms "first," "second," and similar words used in the embodiments of this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly. The article "a" or "an" preceding an element does not exclude the existence of multiple such elements.

[0022] The principles and spirit of this disclosure will be explained in detail below with reference to several representative embodiments.

[0023] As described in the background art, in related technologies, external factors such as external magnetic field interference and electrical noise may affect the normal operation of residual current sensors, resulting in inaccurate monitoring data or exceeding the expected measurement range. In addition, during signal transmission, if the transmission time interval is too long, the monitored data will be delayed.

[0024] Specifically, the technology for monitoring residual current in low-voltage AC power supplies has evolved from electromagnetic current transformers to active electronic current transformers, and then to passive electronic current transformers and fiber optic current transformers, continuously moving towards digitalization, intelligence, high precision, high reliability, and high safety.

[0025] In related technologies, magnetic ring residual current sensors are typically composed of a magnetic ring and a Hall element. When current passes through the magnetic ring, a magnetic field is generated in the magnetic ring, and the Hall element converts the magnetic field into a voltage signal output. It has the advantages of simple structure and high measurement accuracy.

[0026] However, the permeability of the magnetic ring of this sensor is affected by the external magnetic field, so it is not suitable for use in strong magnetic field environments.

[0027] In related technologies, current transformer-type residual current sensors typically consist of a primary coil, a secondary coil, and a magnetic core. When current flows through the primary coil, a magnetic field is generated in the magnetic core. This magnetic field induces a voltage signal proportional to the primary current through the secondary coil.

[0028] However, while the voltage sensitivity of the magnetic core induction coil is improved compared to the hollow induction coil under low current or specific conditions, the magnetic field generated by the magnetic core also causes some interference to the observation field, and its performance and stability may be significantly affected when facing high-frequency interference.

[0029] Among related technologies, electromagnetic induction residual current sensors utilize the principle of electromagnetic induction to convert current signals into voltage signals for output, and have advantages such as simple structure and fast response speed.

[0030] However, this sensor has a narrow measurement range and is not suitable for high current measurement.

[0031] In related technologies, when using Modbus's RTU transmission mode, the receiver needs to continuously detect the time interval between two bytes during data transmission. This is because the time interval between two adjacent bytes is related to the correctness of data packet transmission. If the time interval is too long, the data packet transmission will not be accurate enough, and thus, accurate real-time data information cannot be obtained.

[0032] To address the aforementioned problems, this disclosure provides a low-voltage AC power supply residual current monitoring device, specifically comprising:

[0033] The Hall sensor is configured to acquire a first analog signal from a low-voltage AC power supply and output the first analog signal. The microcontroller is connected to the Hall sensor and includes an analog-to-digital converter (ADC) interface and a communication interface, which are connected via serial communication. The ADC interface is configured to receive the first analog signal output by the Hall sensor and convert it into a first digital signal. The communication interface is configured to transmit the first analog signal. The monitoring terminal device is connected to the microcontroller and configured to receive the first digital signal transmitted by the microcontroller, display the first digital signal, set a threshold based on the digital signal to obtain a second digital signal, and output the second digital signal. This device utilizes the Hall effect of the Hall sensor to achieve magnetoelectric conversion. The Hall sensor not only has high sensitivity but is also unaffected by external interference. The microcontroller has the high efficiency to convert the analog signal output by the sensor into a digital signal, enabling accurate monitoring of residual current.

[0034] After introducing the basic principles of this disclosure, various non-limiting embodiments of this disclosure will be described in detail below.

[0035] refer to Figure 1 A method for monitoring residual current of low-voltage AC power supply, applied to a device for monitoring residual current of low-voltage AC power supply, the device comprising:

[0036] The Hall sensor is configured to acquire a first analog signal from a low-voltage AC power supply and output the first analog signal.

[0037] In practice, low-voltage AC power supply refers to AC power supply with an output voltage of less than 1000V.

[0038] In specific implementation, the low-voltage AC power supply is detected to obtain the first analog signal of the low-voltage AC power supply, which is then referenced. Figure 2 This solution includes a Hall sensor, a microcontroller, a monitoring terminal device, and a switch control module. The Hall sensor can be used to detect low-voltage AC power. The Hall sensor is a sensor that uses the Hall effect to achieve magneto-electric conversion, and it features high sensitivity and wide application. By connecting the Hall sensor to the low-voltage AC power system, the residual current analog signal in the low-voltage AC power is obtained through detection.

[0039] In specific implementation, refer to Figure 2The Hall sensor circuit includes: positive power supply voltage (VCC), resistor (R), Hall element, zero potential / ground wire (GND), differential amplifier circuit and filter. The Hall element is a semiconductor thin film placed in a magnetic field with magnetic induction intensity. A control current is passed through its two opposite sides, and the direction of the magnetic field is orthogonal to the direction of the current. A potential proportional to the product of the control current and the magnetic induction intensity will be generated on both sides of the semiconductor. This potential is the Hall voltage.

[0040] In specific implementation, the methods for amplifying the first analog signal include:

[0041] This scheme utilizes a differential amplifier circuit to amplify the Hall voltage information signal, referencing... Figure 2 A differential amplifier circuit typically consists of two basic common-emitter amplifier circuits that are completely symmetrical to ensure consistency under temperature changes or power fluctuations. Its working principle is based on differential input. By using differential amplifiers, negative feedback and other techniques, the differential signal is amplified and processed. In this scheme, the differential amplifier circuit is used to amplify the useful differential signal in the Hall voltage information to obtain an enhanced electrical signal.

[0042] In specific implementation, the methods for filtering high-frequency noise in the first analog signal include:

[0043] This scheme utilizes a filter to filter the enhanced electrical signal, referencing... Figure 2 The filter is a filter composed of inductors and capacitors; this scheme uses the filter to filter the enhanced electrical signal to obtain the first analog signal; the output signal of the Hall sensor is easily affected by noise, so a noise filter is needed for filtering.

[0044] In specific implementation, the first analog signal is channel selected to obtain an analog signal conversion channel. In this solution, a microcontroller is used to select the channel of the first analog signal. However, the methods for processing the analog signal in this solution include, but are not limited to, a microcontroller, a microcontroller or microcontroller unit.

[0045] The microcontroller is connected to the Hall sensor and includes: an analog-to-digital conversion interface and a communication interface, wherein the analog-to-digital conversion interface and the communication interface are connected via serial communication; the analog-to-digital conversion interface is configured to receive the first analog signal output by the Hall sensor and convert the first analog signal into a first digital signal; the communication interface is configured to transmit the first analog signal.

[0046] As a specific embodiment, refer to Figure 1The microcontroller includes an analog-to-digital converter (ADC), a communication interface, and a digital-to-analog converter (DAC). The ADC, communication, and DAC interfaces are connected via serial communication. The ADC interface in the microcontroller receives the first analog signal output by the Hall sensor. The microcontroller selects one of several ADC channels from the first analog signal and uses it as the ADC channel.

[0047] As a specific embodiment, this solution uses a microcontroller as the analog-to-digital converter. This microcontroller features 4KB of flash programmable and erasable read-only memory, 1000 erase / write cycles, 32 programmable I / O lines, two 16-bit timers / counters, five interrupt sources, and a UART serial channel. In the design, it is primarily used to control the conversion of analog signals output from the sensor signal generator into digital signals for data acquisition, display, and serial communication.

[0048] The following section will further explain how to obtain the analog signal conversion channel:

[0049] The first analog signal is divided into components to obtain at least one component signal. The at least one component signal is then input into at least one analog signal conversion channel. Based on the pin information, the component signals in the at least one analog signal conversion channel are selected to obtain the analog signal conversion channel.

[0050] The methods for determining the pin information of the microcontroller include, but are not limited to, at least one of the following:

[0051] To determine the pin information of a microcontroller, you can check its specific model number, visit professional IC websites such as ic37, search for and download the chip's datasheet, and then determine the pin information. If the chip has a small dot, count the pins counterclockwise from the dot to determine the pin information. If there is no small dot but a semi-circular notch, with the notch facing left, the leftmost pin is the first pin, and then count counterclockwise to determine the pin information. You can also use a multimeter to measure the resistance between each pin and ground and compare it with that of a working IC to determine the pin information. Alternatively, you can consult relevant circuit diagrams or schematics, which usually indicate the function and location of each pin to determine the pin information of the microcontroller.

[0052] As a specific embodiment, the analog-to-digital conversion interface in the microcontroller of this solution can be regarded as a combination of an 8-bit digital-to-analog converter and an 8-channel analog multiplexer. IN0-IN7 correspond to 8 analog inputs respectively. The pins ADDA, ADDB and ADDC determine which analog input is converted, thereby determining one of the several analog signal conversion channels for analog-to-digital conversion.

[0053] The monitoring terminal device is connected to the microcontroller and is configured to receive the first digital signal transmitted by the microcontroller, display the first digital signal, set a threshold based on the digital signal to obtain a second digital signal, and output the second digital signal.

[0054] In specific implementation, the analog signal is converted along the analog signal conversion channel to obtain the first digital signal. This solution utilizes a microcontroller to convert the analog signal along the analog signal conversion channel. (Refer to...) Figure 1 The analog-to-digital converter interface in the microcontroller converts the first analog signal in the analog signal conversion channel into the first digital signal.

[0055] The following section further describes how to obtain the first digital signal:

[0056] In specific implementation, a first positive pulse signal is added to the analog signal transmission channel to lock the analog signal transmission channel:

[0057] Following the specific embodiment described above, applying a positive pulse to the ALE pin of the microcontroller locks the analog signal transmission channel. The ALE pin is a control signal used for address latching. When ALE is high, the channel number selection code on the input pin is latched, even if the analog switch of the corresponding channel is closed.

[0058] In specific implementation, the component signals in the analog signal transmission channel are converted to obtain the first digital signal. Following the above specific embodiment, after applying a positive pulse to the START pin of the microcontroller, the component signals in the analog signal transmission channel are converted to obtain the first digital signal. The START pin is a control pin for initiating analog-to-digital conversion, requiring a positive pulse (at least 100ns wide) to initiate the conversion. The ALE pin is typically connected together with the START pin. Thus, while applying a high-level start signal to the START pin, the channel number can be latched.

[0059] In specific implementation, the first digital signal is transmitted to the monitoring terminal device. This solution utilizes a microcontroller to transmit the first digital signal to the monitoring terminal device. (Refer to...) Figure 1The microcontroller transmits the first digital signal to the monitoring terminal equipment via the data bus.

[0060] The following describes the method for transmitting the first digital signal to the monitoring terminal device:

[0061] In this exemplary embodiment, a second positive pulse signal is added to the first digital signal using a microcontroller to obtain a digital signal to be transmitted, and the digital signal to be transmitted is then transmitted to the monitoring terminal device.

[0062] Following the specific embodiments described above, refer to Figure 1 After the microcontroller (MCU) starts analog-to-digital conversion, a positive pulse is applied to the OE pin. (Refer to...) Figure 3 This includes: 8 analog inputs, a microcontroller, a transceiver chip (MAX485), and a monitoring terminal device; the output microcontroller's tri-state gates are opened to allow the converted digital signal to be transmitted to the data bus, and the multi-channel acquired data is transmitted to the monitoring terminal device via the data bus; (Reference) Figure 4 It includes: a microcontroller (MCU1), a transmitter chip (MAX485 transmitter), a receiver chip (MAX485), and a monitoring terminal equipment integrated circuit chip (MCU2). The microcontroller sends the converted digital signal to the receiver chip through the transmitter chip along a half-duplex twisted pair cable, so as to transmit the microcontroller's digital signal to the monitoring terminal equipment.

[0063] In specific implementation, threshold settings are applied to the monitoring terminal device. This solution utilizes the monitoring terminal device to set thresholds. The monitoring terminal device system uses a Windows system as its development platform. In Windows, the serial port hardware connects to Windows via the communication driver comm.drv, sending and receiving data using standard Windows API functions. The MSComm control's communication function is implemented by calling Windows API functions and defining the API function interface of the Windows communication driver by setting its properties and events. This provides applications with a simple method to send and receive data via the serial interface. The MSComm control provides an event-driven method, enabling the detection and handling of communication events and errors, and offering advantages such as timely program response and high reliability. Therefore, referring to... Figure 5 The monitoring terminal equipment can set a safety threshold for the residual current in the low-voltage AC power supply.

[0064] In specific implementation, when the monitoring terminal device detects that the corresponding attribute of the first digital signal exceeds a set threshold, the low-voltage AC power supply is cut off using the switch control module. Figure 1The monitoring terminal device transmits the set safety threshold to the microcontroller. The microcontroller converts the set safety threshold into a corresponding analog signal through the digital-to-analog interface and sends the analog signal to the switch control module. The switch control module is a device used to protect the current in a low-voltage power distribution system. Its main function is to prevent dangerous situations such as electric shock and fire by detecting and responding to residual current. It is a relay protection device that automatically disconnects the circuit or issues an alarm signal when the current in the circuit exceeds the set safety threshold.

[0065] Through the above exemplary embodiments, this solution can not only monitor the residual current of low-voltage AC power supplies, but also integrate and systematize the residual current data through monitoring terminal equipment. For example, the monitoring terminal equipment can manage various modules in the system, as shown in the reference. Figure 5 The monitoring terminal device includes: a status display unit, a remaining power display unit, a threshold setting unit, and a command issuing unit. The status display unit is configured to display the remaining power status of the low-voltage AC power supply. The remaining power display unit is configured to display the remaining power of the low-voltage AC power supply. The threshold setting unit is configured to set a threshold parameter for the remaining power of the low-voltage AC power supply. The command issuing unit is configured to issue commands regarding the remaining power of the low-voltage AC power supply. The status display unit uses warning lights, the remaining power display unit uses an LED display screen, the threshold setting unit uses the terminal device controls for parameter setting, and the command issuing unit uses the terminal device controls for command issuing. This allows for human-machine interaction through the monitoring terminal device. The monitoring terminal device also enables data display, parameter setting, command issuing, and status monitoring, ensuring the convergence module functions correctly and meets system requirements. The monitoring terminal device allows for real-time data display, historical data query and display, data analysis, and visualization.

[0066] It should be noted that the method of this disclosure embodiment can be executed by a single device, such as a computer or server. The method of this embodiment can also be applied to a distributed scenario, where multiple devices cooperate to complete the task. In such a distributed scenario, one of these devices may execute only one or more steps of the method of this disclosure embodiment, and the multiple devices will interact with each other to complete the method described.

[0067] It should be noted that the above description describes some embodiments of this disclosure. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in a different order than that shown in the above embodiments and still achieve the desired result. Furthermore, the processes depicted in the drawings do not necessarily require a specific or sequential order to achieve the desired result. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0068] Based on the same inventive concept, corresponding to any of the above embodiments, this disclosure also provides a low-voltage AC power supply residual current monitoring device.

[0069] Those skilled in the art will recognize that embodiments of this disclosure can be implemented as a system, method, or computer program product. Therefore, this disclosure can be implemented as entirely hardware, entirely software (including firmware, resident software, microcode, etc.), or a combination of hardware and software, generally referred to herein as a "circuit," "module," or "system." Furthermore, in some embodiments, this disclosure can also be implemented as a computer program product contained in one or more computer-readable media, which includes computer-readable program code.

[0070] Any combination of one or more computer-readable media may be used. A computer-readable medium can be a computer-readable signal medium or a computer-readable storage medium. A computer-readable storage medium can be, for example,, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples (not exhaustive) of a computer-readable storage medium may include: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In this document, a computer-readable storage medium can be any tangible medium that contains or stores a program that can be used by or in connection with an instruction execution system, apparatus, or device.

[0071] Computer-readable signal media may include data signals propagated in baseband or as part of a carrier wave, carrying computer-readable program code. Such propagated data signals may take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. Computer-readable signal media may also be any computer-readable medium other than computer-readable storage media, capable of sending, propagating, or transmitting programs for use by or in connection with an instruction execution system, apparatus, or device.

[0072] Program code contained on a computer-readable medium may be transmitted using any suitable medium, including but not limited to wireless, wire, optical fiber, RF, etc., or any suitable combination thereof.

[0073] Computer program code for performing the operations of this disclosure can be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, and C++, and conventional procedural programming languages ​​such as the "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network, including a local area network (LAN) or a wide area network (WAN), or it can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0074] It should be understood that each block of a flowchart and / or block diagram, as well as combinations of blocks in a flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device to produce a machine that, when executed by a computer or other programmable data processing device, creates means for implementing the functions / operations specified in the blocks of the flowchart and / or block diagram.

[0075] These computer program instructions may also be stored in a computer-readable medium that enables a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable medium produce a product comprising an instruction apparatus that implements the functions / operations specified in the boxes of a flowchart and / or block diagram.

[0076] Computer program instructions may also be loaded onto a computer, other programmable data processing apparatus, or other device to cause a series of operational steps to be performed on the computer, other programmable data processing apparatus, or other device to produce a computer-implemented process, such that the instructions that execute on the computer or other programmable apparatus can provide a process for implementing the functions / operations specified in the boxes of a flowchart and / or block diagram.

[0077] Furthermore, although the operations of the methods of this disclosure are described in a specific order in the accompanying drawings, this does not require or imply that these operations must be performed in that specific order, or that all of the operations shown must be performed to achieve the desired result. Rather, the steps depicted in the flowcharts may be executed in a different order. Additionally or alternatively, certain steps may be omitted, multiple steps may be combined into one step, and / or one step may be broken down into multiple steps.

[0078] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this application. Each block in a flowchart or block diagram may represent a module, segment, or portion of code, which contains one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in a block diagram or flowchart, and combinations of blocks in a block diagram or flowchart, can be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0079] It should be noted that although several modules or units for the device used to perform actions have been mentioned in the detailed description above, this division is not mandatory. In fact, according to the embodiments of this application, the features and functions of two or more modules or units described above can be embodied in one module or unit. Conversely, the features and functions of one module or unit described above can be further divided and embodied by multiple modules or units.

[0080] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of this application (including the claims) is limited to these examples; within the framework of this application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of the embodiments of this application as described above, which are not provided in the details for the sake of brevity.

[0081] Additionally, to simplify the description and discussion, and to avoid obscuring the embodiments of this application, the well-known power / ground connections to integrated circuit (IC) chips and other components may or may not be shown in the provided drawings. Furthermore, the apparatus may be shown in block diagram form to avoid obscuring the embodiments of this application, and this also takes into account the fact that the details of the implementation of these block diagram apparatuses are highly dependent on the platform on which the embodiments of this application will be implemented (i.e., these details should be fully understood by those skilled in the art). While specific details (e.g., circuits) have been set forth to describe exemplary embodiments of this application, it will be apparent to those skilled in the art that the embodiments of this application can be implemented without these specific details or with variations thereof. Therefore, these descriptions should be considered illustrative rather than restrictive.

[0082] Although this application has been described in conjunction with specific embodiments thereof, many substitutions, modifications, and variations of these embodiments will be apparent to those skilled in the art from the foregoing description. For example, other memory architectures (e.g., dynamic RAM (DRAM)) may be used with the embodiments discussed.

[0083] The embodiments of this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the embodiments of this application should be included within the protection scope of this application.

[0084] While the spirit and principles of this disclosure have been described with reference to several specific embodiments, it should be understood that this disclosure is not limited to the disclosed specific embodiments, and the division of aspects does not imply that features in these aspects cannot be combined for benefit; such division is merely for convenience of expression. This disclosure is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. The scope of the appended claims is to be interpreted in the broadest sense, thereby encompassing all such modifications and equivalent structures and functions.

Claims

1. A low-voltage AC power supply residual current monitoring device, characterized in that, include: Hall effect sensors, microcontrollers, and monitoring terminal equipment; The Hall sensor is configured to acquire a first analog signal from a low-voltage AC power supply and output the first analog signal. The microcontroller is connected to the Hall sensor and includes: an analog-to-digital conversion interface and a communication interface, wherein the analog-to-digital conversion interface and the communication interface are connected via serial communication. The analog-to-digital conversion interface is configured to receive the first analog signal output by the Hall sensor and convert the first analog signal into a first digital signal; the communication interface is configured to transmit the first analog signal. The monitoring terminal device is connected to the microcontroller and is configured to receive the first digital signal transmitted by the microcontroller, display the first digital signal, set a threshold based on the digital signal to obtain a second digital signal, and output the second digital signal.

2. The apparatus according to claim 1, characterized in that, The Hall sensor includes a differential amplifier circuit configured to amplify the first analog signal.

3. The apparatus according to claim 1, characterized in that, The Hall sensor further includes a filter configured to filter high-frequency noise from the first analog signal.

4. The apparatus according to claim 1, characterized in that, The microcontroller also includes: a digital-to-analog converter interface; The digital-to-analog conversion interface and the communication interface are connected via serial communication and are configured to receive the second digital signal output by the monitoring terminal device, convert the second digital signal into a second analog signal, and output the second analog signal. The second analog signal is the analog signal that the digital-to-analog conversion interface converts a preset safety threshold into a corresponding analog signal.

5. The apparatus according to claim 4, characterized in that, The device further includes: a switch control module; The switch control module is connected to the microcontroller and is configured to receive a second analog signal transmitted by the microcontroller, and to connect or disconnect the low-voltage AC power supply based on the second analog signal.

6. The apparatus according to claim 1, characterized in that, The monitoring terminal device includes: a status display unit, a remaining power display unit, a threshold setting unit, and a command issuing unit; The status display unit is configured to display the remaining power status of the low-voltage AC power supply; The remaining power display unit is configured to display the remaining power of the low-voltage AC power supply; The threshold setting unit is configured to set the remaining power threshold parameter of the low-voltage AC power supply; The command issuing unit is configured to issue commands regarding the remaining power of the low-voltage AC power supply.

7. The apparatus according to claim 6, characterized in that, The status display unit uses warning lights for display.

8. The apparatus according to claim 6, characterized in that, The remaining battery power display unit uses an LED display screen.

9. The apparatus according to claim 6, characterized in that, The threshold setting unit sets parameters using the terminal device control.

10. The apparatus according to claim 6, characterized in that, The command issuing unit issues commands using the terminal device controls.

Images