A three-phase multi-functional instrument

Abstract

This application provides a three-phase multi-functional instrument, which includes an instrument body and a display screen and buttons disposed on the front of the instrument body; a U-shaped slot matching a guide rail is disposed on the back of the instrument body, the inner wall of the slot being designed as a slope or stepped shape, the slot being engaged with the guide rail through elastic deformation; a communication interface is disposed on the rear side of the instrument body; a control chip is disposed inside the instrument body, and a thermally conductive silicone pad is filled between the chip and the instrument body; the control chip is connected to a power supply, a wireless communication module, and a circuit, the wireless communication module being connected to an antenna, and the circuit being connected to the communication interface. By optimizing the geometry of the inner wall of the slot (such as a slope or stepped protrusion), a wedge-tightening effect is generated when the instrument is engaged with the guide rail, and the lateral friction force generated by the elastic deformation of the material is significantly greater than that of a traditional vertical plane slot, avoiding wiring interruption problems caused by the instrument loosening.

Description

Technical Field

[0001] This application relates to the field of power meter technology, and in particular to a three-phase multi-functional meter. Background Technology

[0002] Three-phase multi-function meters, as core monitoring devices at the end of smart grids, are widely used in energy management systems, industrial automation control, building power distribution monitoring, and other scenarios. They are mainly used to collect basic parameters such as voltage, current, power, frequency, and energy in three-phase power systems in real time, and to achieve remote data transmission and monitoring through communication interfaces. Their technological evolution closely follows the needs of intelligent, efficient, and reliable power systems, integrating power electronics technology, microelectronics technology, communication technology, and embedded system design.

[0003] Early three-phase meters had limited functionality, only capable of measuring basic electrical parameters. Current products, however, have gradually integrated multiple functions such as harmonic analysis, fault recording, and prepaid management. For example, harmonic distortion rate (THD) measurement is achieved through FFT algorithm chips, meeting industry standards. Some products have introduced prepaid modules, supporting IC card recharge and remote on / off control, adapting to individual metering scenarios. Traditional meters primarily use RS485 bus communication, requiring manual configuration of Modbus and other protocol parameters. In recent years, some products have begun integrating wireless communication modules (such as Wi-Fi and LoRa) to support IoT platform access. Simultaneously, multi-protocol adaptive technology has emerged, automatically identifying the host computer's communication protocol through built-in protocol parsing chips, improving system compatibility.

[0004] Currently, traditional three-phase meters are bulky (e.g., width exceeding 90mm), making installation inconvenient in space-constrained scenarios such as energy storage systems and high-density distribution cabinets. While some products employ modular designs, module replacement requires tools, resulting in low maintenance efficiency. Most meters require external auxiliary power lines, leading to complex wiring; in power outage scenarios, backup battery capacity is limited (typically only maintaining clock operation for 24 hours), and lithium batteries pose environmental risks. Some low-cost solutions omit backup power, increasing the risk of data loss. The large size of current three-phase meters makes installation inconvenient; in industrial environments with vibrations, handling collisions, or other impacts, the meters are prone to slipping off the rails or becoming loose, leading to poor contact at the wiring terminals, data transmission interruptions, or even damage from falling. Utility Model Content

[0005] This application provides a three-phase multi-functional instrument to solve the problems of current three-phase instruments being large in size, inconvenient to install, and prone to sliding off the guide rail or loosening due to external forces in industrial field scenarios such as vibration, handling and collision, resulting in poor contact of the wiring terminals, interruption of data transmission, or even damage from falling.

[0006] This application provides a three-phase multi-functional instrument, including:

[0007] The instrument panel itself, as well as the display screen and buttons located on the front of the instrument panel;

[0008] A U-shaped slot matching the guide rail is provided on the back of the instrument body. The inner wall of the slot is designed as a slope or a step. The slot is engaged into the guide rail by elastic deformation.

[0009] A communication interface is provided on the rear side of the instrument body;

[0010] The instrument body is equipped with a control chip, and a thermally conductive silicone pad is filled between the chip and the instrument body.

[0011] The control chip is connected to a power supply, a wireless communication module, and a circuit. The wireless communication module is connected to an antenna, and the circuit is connected to the communication interface.

[0012] In some possible implementations, the groove depth perpendicular to the guide rail direction is 6–8 mm.

[0013] In some possible implementations, the internal width of the card slot is 36–37 mm.

[0014] In some possible implementations, the control chip internally includes a metering unit, a data storage unit, a communication unit, a remote signaling detection unit, and a metering pulse output unit.

[0015] In some possible implementations, one to two ventilation holes are provided on each side of the bottom of the instrument, and the diameter of the ventilation holes is 1 to 3 mm.

[0016] As described above, this application provides a three-phase multi-functional instrument, which includes an instrument body and a display screen and buttons on the front of the instrument body; a U-shaped slot matching a guide rail is provided on the back of the instrument body, the inner wall of the slot is designed as a slope or stepped shape, and the slot is engaged with the guide rail by elastic deformation; a communication interface is provided on the rear side of the instrument body; a control chip is provided inside the instrument body, and a thermally conductive silicone pad is filled between the chip and the instrument body; the control chip is connected to a power supply, a wireless communication module, and a circuit, the wireless communication module is connected to an antenna, and the circuit is connected to the communication interface. By optimizing the geometry of the inner wall of the slot (such as a slope or stepped protrusion), a wedge-tightening effect is generated when the instrument is engaged with the guide rail, and the lateral friction force generated by the elastic deformation of the material is significantly greater than that of a traditional vertical plane slot, avoiding wiring interruption caused by the instrument loosening. Attached Figure Description

[0017] To more clearly illustrate the technical solution of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram of a three-phase multi-function instrument in the embodiments provided in this application.

[0019] Illustration: 1-Instrument body; 2-Display screen; 3-Buttons; 4-Card slot. Detailed Implementation

[0020] The embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described below do not represent all embodiments consistent with this application. They are merely examples of systems and methods consistent with some aspects of this application as detailed in the claims.

[0021] Three-phase multi-function meters, as core monitoring devices at the end of smart grids, are widely used in energy management systems, industrial automation control, building power distribution monitoring, and other scenarios. They are mainly used to collect basic parameters such as voltage, current, power, frequency, and energy in three-phase power systems in real time, and to achieve remote data transmission and monitoring through communication interfaces. Their technological evolution closely follows the needs of intelligent, efficient, and reliable power systems, integrating power electronics technology, microelectronics technology, communication technology, and embedded system design.

[0022] Early three-phase meters had limited functionality, only capable of measuring basic electrical parameters. Current products, however, have gradually integrated multiple functions such as harmonic analysis, fault recording, and prepaid management. For example, harmonic distortion rate (THD) measurement is achieved through FFT algorithm chips, meeting industry standards. Some products have introduced prepaid modules, supporting IC card recharge and remote on / off control, adapting to individual metering scenarios. Traditional meters primarily use RS485 bus communication, requiring manual configuration of Modbus and other protocol parameters. In recent years, some products have begun integrating wireless communication modules (such as Wi-Fi and LoRa) to support IoT platform access. Simultaneously, multi-protocol adaptive technology has emerged, automatically identifying the host computer's communication protocol through built-in protocol parsing chips, improving system compatibility.

[0023] Currently, traditional three-phase meters are bulky (e.g., width exceeding 90mm), making installation inconvenient in space-constrained scenarios such as energy storage systems and dense power distribution cabinets. While some products employ modular designs, module replacement requires tools, resulting in low maintenance efficiency. Most meters require external auxiliary power lines, leading to complex wiring; in power outage scenarios, backup battery capacity is limited (typically only maintaining clock operation for 24 hours), and lithium batteries pose environmental risks. Some low-cost solutions omit backup power, increasing the risk of data loss. The large size of current three-phase meters makes installation inconvenient; in industrial environments with vibrations and collisions during handling, the meters are prone to slipping off the rails or becoming loose, leading to poor contact at the wiring terminals, data transmission interruptions, or even damage from falling. Therefore, if... Figure 1 As shown, this application provides a three-phase multi-function instrument, including:

[0024] The instrument body 1, and the display screen 2 and buttons 3 located on the front of the instrument body;

[0025] A U-shaped groove 4 matching the guide rail is provided on the back of the instrument body 1. The inner wall of the groove 4 is designed as a slope or a step. The groove 4 is inserted into the guide rail by elastic deformation.

[0026] A communication interface is provided on the rear side of the instrument body 1;

[0027] The instrument body 1 is equipped with a control chip, and a thermally conductive silicone pad is filled between the chip and the instrument body 1.

[0028] The control chip is connected to a power supply, a wireless communication module, and a circuit. The wireless communication module is connected to an antenna, and the circuit is connected to the communication interface.

[0029] This application optimizes the geometry of the slot's inner wall (e.g., sloped surface or stepped protrusions) to create a wedge-locking effect when the instrument is inserted into the guide rail. The lateral friction force generated by the material's elastic deformation is significantly greater than that of traditional vertical plane slots. For example, when the slope angle is designed to be 15°, the locking force can be increased by more than 30%, effectively resisting industrial environmental vibrations (such as 5-10Hz vibrations caused by motor start-stop), and avoiding wiring interruptions due to instrument loosening. Simply push the instrument along the guide rail for automatic locking through elastic deformation. Disassembly is achieved by pressing the slot's unlocking part (such as the concealed elastic locking piece), eliminating the need for screwdrivers or other tools, increasing installation efficiency by more than 50%, and meeting the needs of rapid on-site deployment.

[0030] The slot adapts to guide rails with different tolerances through elastic deformation (e.g., DIN 35mm guide rail width tolerance ±0.5mm), avoiding loosening due to machining errors. For example, the multi-level adaptation structure of the stepped slot can be compatible with guide rails with widths of 34.5 to 35.5mm, solving the compatibility problem of traditional fixed-size slots.

[0031] A silicone pad with a thermal conductivity of ≥1.5W / (m·K) is filled between the control chip and the instrument body to quickly conduct the heat from the core heat source of the chip to the metal casing (increasing the heat conduction efficiency by 4 to 6 times), thereby reducing the chip junction temperature by 10 to 15°C and avoiding abnormal program operation or shortened component life due to overheating.

[0032] The heat dissipation fins on the instrument's outer casing create a heat conduction path of "chip → silicone pad → casing → air," eliminating the need for additional fans or active cooling devices. This reduces costs and power consumption while ensuring stable operation in a wide temperature range of -25℃ to 70℃.

[0033] In some embodiments, the depth of the slot 4 perpendicular to the guide rail direction is 6-8 mm.

[0034] In some embodiments, the internal width of the slot 4 is 36-37 mm.

[0035] In this application, the slot 4 is designed with a depth of 6-8 mm, which provides sufficient support thickness in the vertical direction. When the instrument is subjected to external impact (such as collision or compression), the slot 4 is less likely to undergo plastic deformation or breakage. For example, an 8 mm depth can withstand a vertical tensile force of 20 N without damage, ensuring the durability of the guide rail connection.

[0036] The slot 4 is designed with a depth of 6-8mm, allowing for appropriate elastic deformation when it engages with the guide rail. This ensures proper engagement force (approximately 5-8N of lateral friction) while preventing material fatigue failure due to excessive deformation. Compared to traditional 5mm deep slots, the elastic lifespan can be extended by more than 50%.

[0037] The 6-8mm depth perfectly matches the thickness of a DIN 35mm standard guide rail (approximately 7mm), ensuring the slot completely covers the guide rail edge, forming a stable three-point contact (top and sides of the slot) to prevent the instrument from sliding along the guide rail axis. The deeper slot provides space for internal barbs or elastic locking tabs, further enhancing anti-dislodgement capabilities and reducing the probability of the instrument falling off in vibration environments by 80%.

[0038] In high-temperature environments, the plastic card slot will increase in internal width by about 0.1mm due to thermal expansion. The design of card slot 4 with an internal width of 36-37mm provides sufficient expansion space to ensure stable locking force within a temperature range of -25℃ to 70℃.

[0039] When the slot is engaged with the guide rail, the inner walls on both sides undergo elastic deformation due to the pressure from the guide rail, generating a reverse elastic force.

[0040] The width of 36-37mm allows for a deformation space of 0.5-1mm on one side, which is within the elastic deformation limit of most engineering plastics, thus avoiding permanent damage to the slot caused by entering the plastic deformation stage.

[0041] In some embodiments, the control chip internally includes a metering unit, a data storage unit, a communication unit, a remote signaling detection unit, and a metering pulse output unit.

[0042] This invention enables the detection of multiple data points through sampling and conversion, and a multi-functional module, allowing the instrument to acquire and process multiple data points simultaneously, providing comprehensive measurement and monitoring functions.

[0043] In some embodiments, one to two ventilation holes are provided on each side of the bottom of the instrument, and the diameter of the ventilation holes is 1 to 3 mm.

[0044] Symmetrically distributed ventilation holes on both sides of the bottom (e.g., 2 on each side, 4 in total) form a natural convection channel: after the internal heating elements (such as control chips and power modules) heat the air, the hot air is discharged from the top heat dissipation grille, while cool air flows in through the bottom ventilation holes, forming a "bottom in, top out" airflow circulation. When the hole diameter is 1-3mm, the airflow velocity of a single hole can reach 0.05-0.1m / s. Combined with the internal thermally conductive silicone pad, the chip temperature can be reduced by 5-8℃, extending the component life by more than 20%.

[0045] This application provides ventilation holes at the bottom of high-heat areas such as power modules, allowing for the direct introduction of cool air for cooling and preventing heat buildup that could reduce voltage sampling accuracy.

[0046] As can be seen from the above embodiments, this application provides a three-phase multi-functional instrument, which includes an instrument body and a display screen and buttons disposed on the front of the instrument body; a U-shaped slot matching a guide rail is disposed on the back of the instrument body, the inner wall of the slot is designed as a slope or a stepped shape, and the slot is engaged with the guide rail by elastic deformation; a communication interface is disposed on the rear side of the instrument body; a control chip is disposed inside the instrument body, and a thermally conductive silicone pad is filled between the chip and the instrument body; the control chip is connected to a power supply, a wireless communication module, and a circuit, the wireless communication module is connected to an antenna, and the circuit is connected to the communication interface. By optimizing the geometry of the inner wall of the slot (such as a slope or stepped protrusion), a wedge-tightening effect is generated when the instrument is engaged with the guide rail, and the lateral friction force generated by the elastic deformation of the material is significantly greater than that of a traditional vertical plane slot, avoiding the wiring interruption problem caused by the instrument loosening.

[0047] Similar parts between the embodiments provided in this application can be referred to mutually. The specific implementation methods provided above are only a few examples under the overall concept of this application and do not constitute a limitation on the scope of protection of this application. For those skilled in the art, any other implementation methods extended from the solution of this application without creative effort shall fall within the scope of protection of this application.

Claims

1. A three-phase multifunction meter characterized by, include: The instrument body (1) and the display screen (2) and buttons (3) set on the front of the instrument body; A U-shaped slot (4) matching the guide rail is provided on the back of the instrument body. The inner wall of the slot is designed as a slope or a step. The slot is inserted into the guide rail by elastic deformation. A communication interface is provided on the rear side of the instrument body (1); The instrument body (1) is equipped with a control chip, and a thermally conductive silicone pad is filled between the chip and the instrument body (1). The control chip is connected to a power supply, a wireless communication module, and a circuit. The wireless communication module is connected to an antenna, and the circuit is connected to the communication interface.

2. The three-phase multifunction meter of claim 1, wherein, The depth of the slot (4) perpendicular to the guide rail direction is 6-8 mm.

3. The three-phase multifunction meter of claim 1, wherein, The internal width of the card slot (4) is 36-37mm.

4. The three-phase multifunction meter of claim 1, wherein, The control chip is internally equipped with a metering unit, a data storage unit, a communication unit, a remote signaling detection unit, and a metering pulse output unit.

5. The three-phase multifunction meter of claim 1, wherein, One to two ventilation holes are provided on each side of the bottom of the instrument, and the diameter of the ventilation holes is 1 to 3 mm.

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