Circuit board detection device and method of three-phase instrumented meter

Abstract

The invention relates to a circuit board detection device and method for a three-phase Internet of Things meter, and the device comprises a base which is of a hollow structure; the test mainboard is mounted in the base, and the test mainboard is integrated with a main control chip, and a metering detection module, a communication detection module and a module detection module which are controlled by the main control chip; the two detection assemblies are mounted on the upper surface of the base and are connected with the test mainboard through data transmission lines; the detection assembly is used for bearing a circuit board to be detected and establishing signal transmission channels between the circuit board to be detected and the metering detection module and between the communication detection module and the module detection module. Two detection positions are provided, and the test chip has abundant detection functions, so that the function detection of two different types of circuit boards can be realized at the same time. The circuit board detection device solves the problem that a circuit board detection device for a three-phase Internet of Things meter is lacked at present.

Description

Technical Field

[0001] The present application relates to the field of circuit board function detection, and in particular to a circuit board detection device for a three-phase IoT meter. Background Art

[0002] During the production process, it is necessary to test the key circuit functions of the circuit board in advance. Adding a circuit board single board testing process before spraying the three-conformal paint to ensure that the welding of the circuit board is normal before proceeding with subsequent work can effectively guarantee production efficiency and product yield.

[0003] The three-phase IoT meter is a new product, and there is currently no device for detecting the circuit board of the IoT meter. The three-phase intelligent IoT meter consists of two circuit boards, namely the management core circuit board and the metering core circuit board. The two circuit boards have different layouts and functions, and the circuit board appearance and structure are also different. The detection function of the traditional circuit board detection device is relatively single, and one detection device is only for one type of circuit board. Therefore, the three-phase IoT meter needs to use at least two circuit board detection devices to perform functional detection on the management core circuit board and the metering core circuit board respectively, which has the problem of complicated detection process.

[0004] With regard to the problem that there is still a lack of circuit board detection devices for three-phase IoT meters, no effective solution has been proposed yet. Summary of the invention

[0005] The present invention provides a circuit board detection device for a three-phase IoT meter to solve the problem that there is currently a lack of circuit board detection devices for three-phase IoT meters.

[0006] The present invention provides a circuit board detection device for a three-phase IoT meter, comprising:

[0007] A base, wherein the base is a hollow structure;

[0008] A test mainboard, which is installed inside the base and integrates a main control chip and a metering detection module, a communication detection module and a module detection module controlled by the main control chip;

[0009] Two detection components, the detection components are installed on the upper surface of the base and connected to the test mainboard through a data transmission line, and the detection components are used to carry the circuit board under test and establish a signal transmission channel between the circuit board under test and the measurement detection module, the communication detection module and the module detection module.

[0010] In some of the embodiments, each detection component includes a detection needle board and a chip carrier board, wherein the detection needle board is mounted on the upper surface of the base and is connected to the test main board via the data cable, and the chip carrier board is mounted above the detection needle board via a spring and is provided with a pinhole for the metal needle of the detection needle board to pass through.

[0011] In some of the embodiments, it also includes:

[0012] A mounting plate, the mounting plate being fixedly mounted on the upper surface of the base and located on one side of the detection assembly;

[0013] A pressing component is mounted on the mounting plate and is used to apply pressure to the circuit board under test on the chip carrier so that the test points of the circuit board under test contact with the metal needles of the detection needle board.

[0014] In some of the embodiments, the ends of the metal needles of the detection needle plate are telescopic structures.

[0015] In some of the embodiments, the pressing assembly includes a control member, a pressing member and a limiting member;

[0016] The control member is mounted on the mounting plate and connected to the pressing member, and the control member is used to control the vertical movement of the pressing member so that the bottom end of the pressing member abuts against the circuit board under test;

[0017] The limiting member is mounted on the mounting plate and is at least partially located on the movement path of the pressing member to limit the position of the pressing member.

[0018] In some of the embodiments, the detection component is mounted on the upper surface of the base in a detachable manner;

[0019] The data transmission line is a flat cable, and the flat cable is pluggably connected to the test mainboard.

[0020] In some of the embodiments, the metering detection module includes 6-way metering chips, 3-way current detection circuits and 15-way voltage detection circuits;

[0021] The 6-way metering chip is electrically connected to the main control chip, and the 3-way current detection circuit and the 15-way voltage detection circuit are both electrically connected to the 6-way metering chip.

[0022] In some of the embodiments, the communication detection module includes 3 RS485 communication circuits, 1 CAN communication circuit and 1 Bluetooth communication circuit;

[0023] The three RS485 communication circuits, the one CAN communication circuit and the one Bluetooth communication circuit are all electrically connected to the main control chip.

[0024] In some of the embodiments, the module detection module includes a 4-way module test circuit;

[0025] The 4-way module test circuit is electrically connected to the main control chip.

[0026] In a second aspect, the present invention provides a circuit board detection method for a three-phase IoT meter, comprising:

[0027] The circuit board detection device for the three-phase IoT meter described in the first aspect is used to detect the management core circuit board and the metering core circuit board in the three-phase IoT meter at the same time.

[0028] Compared with the related art, the circuit board detection device provided by the present invention provides two detection positions, and the test chip has rich detection functions, which can simultaneously realize functional detection of two circuit boards of different types, and can quickly and effectively perform circuit board detection on three-phase Internet of Things meters, solving the problem of the current lack of circuit board detection devices for three-phase Internet of Things meters.

[0029] Details of one or more embodiments of the present application are set forth in the following drawings and description to make other features, objects, and advantages of the present application more readily apparent. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a structural diagram of a circuit board detection device of a three-phase IoT meter provided in some embodiments of the present invention;

[0031] Figure 2 It is a functional logic diagram of a test mainboard provided in some embodiments of the present invention. DETAILED DESCRIPTION

[0032] In order to more clearly understand the purpose, technical solutions and advantages of the present application, the present application is described and illustrated below in conjunction with the accompanying drawings and embodiments.

[0033] Unless otherwise defined, the technical terms or scientific terms involved in this application shall have the general meaning understood by people with ordinary skills in the technical field to which this application belongs. The words "one", "a", "a", "the", "these" and the like in this application do not represent quantitative restrictions, and they can be singular or plural. The terms "include", "comprise", "have" and any variants thereof involved in this application are intended to cover non-exclusive inclusions; for example, a process, method and system, product or device comprising a series of steps or modules (units) is not limited to the listed steps or modules (units), but may include unlisted steps or modules (units), or may include other steps or modules (units) inherent to these processes, methods, products or devices. The words "connect", "connected", "coupled" and the like involved in this application are not limited to physical or mechanical connections, but may include electrical connections, whether directly or indirectly. The "multiple" involved in this application refers to two or more. "And / or" describes the association relationship of associated objects, indicating that there can be three relationships. For example, "A and / or B" can mean: A exists alone, A and B exist at the same time, and B exists alone. Usually, the character " / " indicates that the objects associated with each other are in an "or" relationship. The terms "first", "second", "third", etc. involved in this application are only used to distinguish similar objects and do not represent a specific ordering of the objects.

[0034] In an embodiment of the present invention, a circuit board detection device for a three-phase IoT meter is provided. Figure 1 is a structural diagram of a circuit board detection device of a three-phase IoT meter provided in an embodiment of the present invention, referring to Figure 1 The circuit board detection device of the three-phase IoT meter includes a base 10, a test main board and two detection components.

[0035] The base 10 is a hollow structure, and usually a corresponding power switch button and indicator light are also provided on the base 10. Exemplarily, the base 10 can be a box body assembled from six panels. The indicator light and power switch button can be provided on the top panel, and the power supply line can be installed on the back panel. There are two hollow grooves on each of the left and right side panels, which are used as handles when lifting the device. The top panel and the left and right side panels are connected by a metal lock, which can ensure that the top panel is tightly connected to the side panels, so that the components installed on the top panel can be tightly connected to the entire box body.

[0036] The test mainboard is installed inside the base 10 . The test mainboard integrates a main control chip and a metering detection module, a communication detection module and a module detection module controlled by the main control chip.

[0037] The test mainboard is connected to the power supply line and powered by an external power supply. At the same time, the test mainboard is also connected to an indicator light and a power switch button. The power switch button is used to control the switch state of the test mainboard, and the indicator light is used to display the working state of the test mainboard. The relevant technology is relatively mature in integrated circuits, and the present invention will not be specifically introduced.

[0038] The test function of the existing circuit board detection device is relatively simple, and can only meet the functional test of a single circuit board. Compared with the existing circuit board detection device, the test mainboard in the present invention has more test functions and can meet the test of at least two different circuit boards at the same time. It is mainly reflected in that the circuit board is integrated with a metering detection module, a communication detection module and a module detection module for testing, each detection model is controlled by the main control chip, the test algorithm is executed by the main control chip, and the corresponding data is collected through each module to determine whether the function of the tested circuit board is normal. Exemplarily, the main control chip can use GD32F460. Among them, the metering detection module is used for current and voltage detection, which can directly detect the current and voltage of the circuit board and the functions related to the current and voltage, such as power consumption. The communication detection module is used to detect the communication functions of various protocol interfaces. According to the requirements of the Internet of Things table, the management core circuit board of the Internet of Things device is configured with a 1-way carrier interface and a 3-way expansion module interface, and the module detection module is used to test the carrier interface and the expansion module interface.

[0039] Reference Figure 2 In some embodiments, the metering detection module includes a 6-way metering chip, a 3-way current detection circuit and a 15-way voltage detection circuit; the 6-way metering chip is electrically connected to the main control chip, and the 3-way current detection circuit and the 15-way voltage detection circuit are both electrically connected to the 6-way metering chip. The 15-way voltage detection circuit can be composed of five 3-way voltage detection circuits. Exemplarily, the metering chip can adopt R8209D. The 6-way metering chip has 6 lower interfaces, which are electrically connected to a 3-way current detection circuit and five 3-way voltage detection circuits respectively, and the 6-way metering chip is connected to the main control chip through the upper interface. The current signal and voltage signal of the circuit board under test can be directly collected through the current detection circuit and the voltage detection circuit. It should be noted that the current detection circuit and the voltage detection circuit are used in conjunction with the metering chip, and then when the metering chip adopts R8209D, the current detection circuit and voltage detection circuit that come with the metering chip R8209D can be used.

[0040] In some embodiments thereof, the communication detection module includes 3 RS485 communication circuits, 1 CAN communication circuit and 1 Bluetooth communication circuit; the 3 RS485 communication circuits, 1 CAN communication circuit and 1 Bluetooth communication circuit are all electrically connected to the main control chip. Among them, the 3 RS485 communication circuits communicate with the PC end through 1 interface, and the remaining 2 interfaces are used to establish RS485 communication with the circuit board under test, thereby testing the RS485 communication function of the circuit board under test. 1 CAN communication circuit is used to establish CAN communication with the circuit board under test, thereby testing the CAN communication function of the circuit board under test. 1 Bluetooth communication circuit is used to establish Bluetooth communication with the circuit board under test, thereby testing the Bluetooth communication function of the circuit board under test. Exemplarily, the RS485 communication circuit can use a communication circuit with a chip CA-IS3092W with an isolation function as the core, the CAN communication circuit can use a communication circuit with a chip CA-IS3062W as the core, and the Bluetooth communication circuit can use a communication circuit with a chip HZT810V2.0 as the core. These circuits are relatively mature products on the market and will not be introduced in detail in this invention.

[0041] In some of the embodiments, the module detection module includes a 4-way module test circuit; the 4-way module test circuit is electrically connected to the main control chip. The 4-way interfaces of the 4-way module test circuit are used to respectively correspond to the 1-way carrier interface and the 3-way expansion module interface of the management core circuit board in the IoT device, and the test functions include serial communication, SPI communication and GPIO port status. These test functions are provided by the main control chip, and then the 4-way module test circuit can be a matching test circuit with the main control chip.

[0042] It should be noted that, in other embodiments, the main control chip does not need a test circuit to process the signal when implementing these functional tests. The port of the main control chip can be directly connected to the mainboard interface through the mainboard bus. For example, when the main control chip uses GD32F460, it can be considered that the module detection module only includes the corresponding mainboard bus.

[0043] In summary, the test template integrates a measurement detection module, a communication detection module and a module detection module, which can realize multiple functional tests, meet the test requirements of different types of circuit boards, and can test two circuit boards at the same time.

[0044] Two detection components are installed on the upper surface of the base 10 and connected to the test mainboard through a data transmission line. The detection components are used to carry the circuit board under test and establish a signal transmission channel between the circuit board under test and the measurement detection module, the communication detection module and the module detection module.

[0045] The detection component is used to place the circuit board under test, thereby connecting the signal transmission channel between the circuit board under test and each detection module, making it convenient for each detection module to collect signals from the circuit board under test.

[0046] Since the test mainboard in the present invention has more detection functions and can simultaneously realize the function detection of at least two circuit boards, two detection components are configured in the present invention for placing two circuit boards to be tested.

[0047] Furthermore, the test motherboard in the present invention can realize the function detection of different types of circuit boards. Different circuit boards have different structures and circuit layouts, and are respectively adapted to different detection components, so that the detection components need to be detachable and replaceable. Therefore, in some preferred embodiments, the installation mode of the detection component on the upper surface of the base 10 is detachable; the data transmission line is a flat cable, and the flat cable is pluggable and connected to the test motherboard.

[0048] Specifically, in the present embodiment, the detection component is detachably mounted on the base 10, and the data transmission line adopts a pluggable flat cable, so as to facilitate the user to replace the detection component adapted to different circuit boards. Furthermore, a flat cable interface can be provided on the test mainboard, and the flat cable interface is connected to each detection module. For example, each test interface of 3-way current detection circuit, 15-way voltage detection circuit, 3-way RS485 communication circuit, 1-way CAN communication circuit, 1-way Bluetooth communication circuit and 4-way module test circuit is integrated in a flat cable interface. When the detection component is connected to the test mainboard through a flat cable, a signal transmission channel between the circuit board under test and each detection circuit can be established, so that each detection circuit can perform corresponding signal acquisition.

[0049] In some of the embodiments, each detection component includes a detection needle plate 21 and a chip carrier 22. The detection needle plate 21 is installed on the upper surface of the base 10 and is connected to the test main board through a data cable. The chip carrier 22 is installed above the detection needle plate 21 through a spring and is provided with a pinhole for the metal needle of the detection needle plate 21 to pass through.

[0050] In this embodiment, a specific structure of a detection component is provided. Among them, the chip carrier 22 matches the shape of the circuit board to be tested and is used to place the circuit board to be tested. The position of the metal needle on the detection needle plate 21 matches the position of the measured point of the circuit board to be tested. After the circuit board to be tested is placed on the chip carrier 22, relying on the gravity of the circuit board or an external force, the chip carrier 22 moves down so that each metal needle of the detection needle plate 21 contacts each measured point on the circuit board to be tested, thereby establishing a signal transmission channel between each measured point and the corresponding detection module.

[0051] Preferably, the end of the metal needle of the detection needle plate 21 is a telescopic structure. The telescopic structure can adopt a spiral spring structure, so that the end of the metal needle can shrink after contacting the circuit board under test to avoid damage to the circuit board under test.

[0052] In order to ensure that the circuit board under test can stably contact the metal needles, a pressing component may be provided to apply a pressing force to the circuit board under test.

[0053] Therefore, in some preferred embodiments, the circuit board detection device further includes a mounting plate 30 and a pressing assembly. The mounting plate 30 is fixedly mounted on the upper surface of the base 10 and is located on one side of the detection assembly; the pressing assembly is mounted on the mounting plate 30, and the pressing assembly is used to apply pressure to the circuit board under test on the chip carrier 22, so that the test points of the circuit board under test contact with the metal needles of the detection needle plate 21.

[0054] The mounting plate 30 can be perpendicular to the upper surface of the base 10 and is mainly used to install a hold-down assembly. The specific structure of the hold-down assembly can be set according to actual conditions and can be manually operated or electrically driven.

[0055] Specifically, the pressing assembly includes a control member 31, a pressing member 32 and a limiting member; the control member 31 is installed on the mounting plate 30 and connected to the pressing member 32, and the control member 31 is used to control the vertical movement of the pressing member 32 so that the bottom end of the pressing member 32 is against the circuit board under test; the limiting member is installed on the mounting plate 30 and is at least partially in the movement path of the pressing member 32 to limit the pressing member 32.

[0056] The pressure piece 32 is a component that is in direct contact with the circuit board under test. Exemplarily, the pressure plate may include a horizontally arranged pressure plate and a pressure rod fixed to the lower side of the pressure plate and arranged vertically. During the downward movement of the pressure piece 32, the end of the pressure rod contacts the edge of the circuit board under test. The control piece 31 may adopt a lever-type handle to facilitate the user to manually control the pressure piece 32. The control piece 31 may also directly adopt devices such as an electric push rod to achieve electric control. The structure of the limiter can be diverse, one end of which is fixedly connected to the mounting plate 30, and the other end extends to the movement path of the pressure piece 32, which is used to prevent the pressure piece 32 from moving downward excessively and causing damage to the circuit board under test.

[0057] In summary, the circuit board detection device provided by the present invention provides two detection positions, and the test chip has rich detection functions, which can simultaneously realize functional detection of two circuit boards of different types, and can quickly and effectively perform circuit board detection on three-phase Internet of Things meters, solving the problem of the current lack of circuit board detection devices for three-phase Internet of Things meters.

[0058] As described above, at least one embodiment of each part of the circuit board detection device of the three-phase IoT meter provided by the present invention has been described respectively. It should be noted that the various parts of the circuit board detection device of the three-phase IoT meter can be combined in different embodiments to form different embodiments of the circuit board detection device of the three-phase IoT meter.

[0059] In a specific overall embodiment, the circuit board detection device of the three-phase IoT meter is mainly used to detect the metering core circuit board and the management core circuit board in the three-phase IoT meter, and includes:

[0060] The device includes a device frame, which includes a bottom box body part (which is a base 10) and an upper back panel part (which is a mounting plate 30). The bottom box body part is a box body assembled from six panels. The back panel has a power connection line and a power switch. The top panel is provided with a button and four indicator lights. The left and right side panels each have two hollow grooves for use as handles when lifting the device. The top panel is connected to the left and right side panels by a metal lock, which can ensure that the upper panel and the device above the upper panel are tightly connected to the box body.

[0061] Two nail boards (which are detection needle boards 21) are placed on the top panel of the box body at the bottom of the device frame, respectively on the left and right halves of the top panel. The left half is the metering core circuit board nail board, and the right half is the management core circuit board nail board. A circuit board carrier (which is the chip carrier 22) of the same size is placed above each nail board. The carrier board and the nail board are tightly connected by positioning screws. The nail board is equipped with fixed point needles, which can effectively connect the corresponding test points of the circuit board and conduct the signals directly between the circuit board and the main board.

[0062] Each carrier is equipped with a pressure plate (which is a pressing member 32), which is used to provide a certain amount of pressure to ensure that the circuit board and the needle plate are in effective contact. The pressure plate is connected to the lower end of the handle (which is a control member 31), and the handle is connected to the pressure plate limiter. The pressure plate limiter is used to connect the bottom box body of the device frame and the upper back plate. The upper back plate is used to fix the two handle positions and can be moved up and down to two fixed positions. When the handle is moved to the upper fixed position, the pressure plate and the circuit board carrier can be separated, and the circuit board can be taken. When the handle is moved to the lower fixed position, the pressure plate can be pressed down to support the circuit board, so that the circuit board is tightly stuck on the carrier.

[0063] A main circuit board is placed inside the box body at the bottom of the device frame. The main circuit board is connected to the power supply part of the back panel of the box body and is powered by the outside. The main circuit board is connected to the switch indicator light on the top panel to receive operation instructions and display the circuit board detection status. The main board is connected to the nail board through a connecting cable to obtain the circuit board signal. The main board is designed to detect the voltage values ​​of multiple test points, and the serial port communication and SPI communication of the metering core and the management core are tested by sending data, so as to realize the communication test of the metering core and the management core from the single board level.

[0064] When the metering core circuit board and the management core circuit board are tightly crimped by the handle, start the switch button on the top plate of the bottom box body, and the main board will detect the voltage points of the metering core and the management core, and detect the communication between the two boards. During the detection, the corresponding lights 1 and 2 on the left of the top plate will flash, indicating that the metering core at position 1 is being detected and the management core at position 2 is being detected. After the detection, the top plate light 3 is always on, indicating that the metering core at position 1 has passed the test, and the light 4 is always on, indicating that the management core at position 2 has passed the test.

[0065] The mainboard includes the main chip GD32F460, two buttons, four lights, one Bluetooth communication, three RS485 communications, one CAN communication, and 6 metering chips. The R8209D is used, which can achieve up to 15 voltage detections and 3 current detections. It can meet the detection function requirements of various electric energy meter circuit boards.

[0066] The circuit board detection device is also equipped with a corresponding power supply circuit. The power supply circuit includes four parts. One is a low-voltage circuit 5V output of DCDC conversion, which is used to power the system main control chip and the metering chip. The second is a low-voltage 5V, which is used to power the management chip of the circuit board and is used for external communication of the 485 circuit and CAN circuit. The third is DCDC converted to 6V and 3.3V voltage, which is used to simulate the battery of the energy meter and can be used to measure the power consumption of the circuit board. The fourth is a high-power power supply with a 12V voltage and a 3A current output, which is used to test other circuit boards with high power requirements and power them.

[0067] The circuit board detection device in the above embodiment has the following technical effects:

[0068] 1. It can be used to test a set of metering core and management core of a three-phase IoT meter at the same time.

[0069] 2. It can be used to detect similar measurement circuit boards. By matching different nail boards and carrier boards, it can be adapted to various circuit board detections.

[0070] In an embodiment of the present invention, a circuit board detection method for a three-phase IoT meter is also provided, comprising:

[0071] The circuit board detection device for the three-phase IoT meter provided by the present invention can detect the management core circuit board and the metering core circuit board in the three-phase IoT meter at the same time.

[0072] Among them, the management chip detection includes voltage point detection (implemented by the metering detection module), expansion module detection (implemented by the module detection module) and Bluetooth communication detection (implemented by the communication detection module), and the metering chip includes voltage point detection, battery detection and circuit board power consumption detection (all implemented through the metering detection module).

[0073] It should be understood that the specific embodiments described herein are only used to explain the application, rather than to limit it. Based on the embodiments provided in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of this application.

[0074] Obviously, the drawings are only some examples or embodiments of the present application. For ordinary technicians in the field, the present application can also be applied to other similar situations based on these drawings without creative work. In addition, it is understandable that although the work done in this development process may be complicated and lengthy, for ordinary technicians in the field, certain changes in design, manufacturing or production based on the technical content disclosed in this application are only conventional technical means and should not be regarded as insufficient content disclosed in this application.

Claims

1. A circuit board detection device for a three-phase IoT meter, characterized in that: include: A base, wherein the base is a hollow structure; A test mainboard, which is installed inside the base and integrates a main control chip and a metering detection module, a communication detection module and a module detection module controlled by the main control chip; Two detection components, the detection components are installed on the upper surface of the base and connected to the test mainboard through a data transmission line, and the detection components are used to carry the circuit board under test and establish a signal transmission channel between the circuit board under test and the measurement detection module, the communication detection module and the module detection module.

2. The circuit board detection device of the three-phase IoT meter according to claim 1, characterized in that: Each detection component includes a detection needle plate and a chip carrier. The detection needle plate is installed on the upper surface of the base and is connected to the test main board through the data line. The chip carrier is installed above the detection needle plate through a spring and is provided with a pinhole for the metal needle of the detection needle plate to pass through.

3. The circuit board detection device of the three-phase IoT meter according to claim 2, characterized in that: Also includes: A mounting plate, the mounting plate being fixedly mounted on the upper surface of the base and located on one side of the detection assembly; A pressing component is mounted on the mounting plate and is used to apply pressure to the circuit board under test on the chip carrier so that the test points of the circuit board under test contact with the metal needles of the detection needle board.

4. The circuit board detection device of the three-phase IoT meter according to claim 3, characterized in that: The end of the metal needle of the detection needle plate is a telescopic structure.

5. The circuit board detection device of the three-phase IoT meter according to claim 3, characterized in that: The pressing component comprises a control part, a pressing part and a limiting part; The control member is mounted on the mounting plate and connected to the pressing member, and the control member is used to control the vertical movement of the pressing member so that the bottom end of the pressing member abuts against the circuit board under test; The limiting member is mounted on the mounting plate and is at least partially located on the movement path of the pressing member to limit the position of the pressing member.

6. The circuit board detection device of the three-phase IoT meter according to claim 1, characterized in that: The detection component is installed on the upper surface of the base in a detachable manner; The data transmission line is a flat cable, and the flat cable is pluggably connected to the test mainboard.

7. The circuit board detection device of the three-phase IoT meter according to claim 1, characterized in that: The metering detection module includes 6 metering chips, 3 current detection circuits and 15 voltage detection circuits; The 6-way metering chip is electrically connected to the main control chip, and the 3-way current detection circuit and the 15-way voltage detection circuit are both electrically connected to the 6-way metering chip.

8. The circuit board detection device of the three-phase IoT meter according to claim 1, characterized in that: The communication detection module includes 3 RS485 communication circuits, 1 CAN communication circuit and 1 Bluetooth communication circuit; The three RS485 communication circuits, the one CAN communication circuit and the one Bluetooth communication circuit are all electrically connected to the main control chip.

9. The circuit board detection device of the three-phase IoT meter according to claim 1, characterized in that: The module detection module includes 4-way module test circuits; The 4-way module test circuit is electrically connected to the main control chip.

10. A circuit board detection method for a three-phase IoT meter, characterized in that: include: The circuit board detection device of the three-phase IoT meter described in any one of claims 1-9 is used to simultaneously detect the management core circuit board and the metering core circuit board in the three-phase IoT meter.

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