Radio current meter and control system thereof

Abstract

The application relates to a wireless ammeter and a control system thereof, which comprises a hook-shaped current clamp, a star-shaped adapter, an insulating operating rod and a clamp opening and closing device. The first end of the hook-shaped current clamp is bent to form a U-shaped clamp opening, which is used for collecting line current and converting the line current into an electric signal when the U-shaped clamp opening corresponding area is closed. The star-shaped adapter is used for connecting or disconnecting the hook-shaped current clamp and the insulating operating rod. The insulating operating rod is configured to transmit the operation force borne by the insulating operating rod to the hook-shaped current clamp when the hook-shaped current clamp is connected through the star-shaped adapter. The clamp opening and closing device is fixed to the surface of one side of the U-shaped clamp opening and is configured to open the U-shaped clamp opening corresponding area under the action of the operation force transmitted by the insulating operating rod. The U-shaped clamp opening corresponding area is closed when the clamp opening and closing device is in a preset state. The wireless ammeter can improve the detection efficiency.

Description

Technical Field

[0001] This application relates to the field of power distribution network detection technology, and in particular to a wireless current meter and its control system. Background Technology

[0002] In the operation and production of distribution networks, when performing current detection on high and low voltage cables and overhead low voltage lines in switchgear, traditional current clamps are difficult to effectively carry out measurement work due to factors such as tight cable arrangement, limited space inside the cabinet, deep cable location, and excessive height of overhead lines, which seriously restricts the efficiency of line voltage detection. At the same time, the safety briefing for external breakage points has precise requirements for cable depth, line height, and specific location of external breakage points, but on-site operators often face the problem of not being able to see the ammeter reading clearly or misreading it at night. Summary of the Invention

[0003] Therefore, it is necessary to provide a wireless current meter and its control system that can improve detection efficiency in response to the above-mentioned technical problems.

[0004] In a first aspect, this application provides a wireless current meter, comprising:

[0005] The hook-shaped current clamp has its first end bent to form a U-shaped jaw, which is used to collect the line current when the area corresponding to the U-shaped jaw is closed, and convert the line current into an electrical signal.

[0006] A plum blossom adapter is used to connect or disconnect hook-shaped current clamps from an insulated operating rod.

[0007] An insulated operating lever is configured to transfer the applied operating force to the hook-type current clamp when connected via a Phillips head adapter.

[0008] The jaw opener is fixed to one side of the U-shaped jaws and is configured to open the area corresponding to the U-shaped jaws under the action of the operating force transmitted by the insulated operating rod; and to close the area corresponding to the U-shaped jaws when in a preset state.

[0009] In one embodiment, it further includes:

[0010] The power supply mechanism includes a power interface and a power switch; the power interface and the power switch are fixed to one side surface of the second end of the hook-shaped current clamp; the power interface is used to connect the power supply and the hook-shaped current clamp to provide power; the power switch is used to select whether to turn the power supply and the hook-shaped current clamp on or off.

[0011] In one embodiment, it further includes:

[0012] The lighting mechanism includes a lighting module and a lighting switch; the lighting module and the lighting switch are fixed to one side surface of the second end of the hook-shaped current clamp; the lighting module is used to provide illumination; the lighting switch is used to select whether the illumination of the lighting module is turned on or off.

[0013] In one embodiment, it further includes:

[0014] The ranging mechanism, located on one side surface of the second end of the hook-shaped current clamp, is used to collect height information when the area corresponding to the U-shaped jaws is closed.

[0015] Secondly, this application also provides a control system for a wireless current meter, comprising:

[0016] The power module is used to convert external power into a preset voltage and provide power to the control unit and the data acquisition unit respectively.

[0017] The data acquisition unit includes a current reading module; the current reading module is used to read the electrical signal output by the wireless current meter.

[0018] The control unit is used to convert electrical signals into current values.

[0019] In one embodiment, the data acquisition unit further includes:

[0020] The ranging module is used to acquire altitude information collected by the wireless current meter.

[0021] In one embodiment, it further includes:

[0022] The communication unit, connected to the control unit, is used to send alarm signals.

[0023] In one embodiment, the control unit is also configured to trigger an alarm signal when the current value exceeds a preset threshold.

[0024] In one embodiment, the control unit is also used to locate the route based on altitude and latitude / longitude information.

[0025] In one embodiment, the control unit is also configured to control the illumination of the wireless current meter upon receiving a nighttime operation instruction.

[0026] The aforementioned wireless current meter and its control system, by employing an insulated operating rod and connecting to the current clamp via a plum blossom adapter, allows operators to complete the clamp opening and closing and current acquisition operations from a safe distance away from live lines. This avoids the risk of electric shock from direct contact with high-voltage lines and is suitable for live-line inspection scenarios of high and low voltage distribution lines. Through the preset closed state of the clamp opener and the locking mechanism, it can ensure that the U-shaped clamps fit tightly after closing, quickly measuring the line current and avoiding magnetic circuit leakage caused by the clamp gap. This ensures the sensing accuracy of the current transformer and makes the measurement data more accurate. At the same time, the stable closed state can prevent the clamps from accidentally opening during the measurement process, improving the reliability of the measurement process. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the drawings used in the description of the embodiments of this application or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is one of the structural schematic diagrams of a wireless current meter in one embodiment;

[0029] Figure 2 This is a second schematic diagram of the structure of a wireless current meter in one embodiment;

[0030] Figure 3 This is a block diagram of the control system for a wireless current meter in one embodiment;

[0031] Figure 4 This is a circuit diagram of the control unit in one embodiment;

[0032] Figure 5 This is a circuit diagram of the communication unit in one embodiment.

[0033] Explanation of reference numerals in the attached figures:

[0034] 100-Hook-shaped current clamp; 200-Plum blossom adapter; 300-Insulated operating rod; 400-Jaw opener / closer; 500-Power supply mechanism; 510-Power interface; 520-Power switch; 600-Lighting mechanism; 610-Lighting module; 620-Lighting switch; 700-Distance measuring mechanism. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0036] In the description of this application, it should be understood that if terms such as "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0037] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0038] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0039] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0040] In the operation and production of distribution networks, when performing current detection on high and low voltage cables and overhead low voltage lines in switchgear, traditional current clamps are difficult to effectively carry out measurement work due to factors such as tight cable arrangement, limited space inside the cabinet, deep cable location, and excessive height of overhead lines, which seriously restricts the efficiency of line voltage detection. At the same time, the safety briefing for external breakage points has precise requirements for cable depth, line height, and specific location of external breakage points, but on-site operators often face the problem of not being able to see the ammeter reading clearly or misreading it at night.

[0041] Based on this, this application provides a wireless current meter and its control system with line location and overcurrent alarm capabilities. It mainly consists of an insulated operating rod, a hook-shaped current clamp, a jaw opener / closer, a universal adjustable light, and a mobile terminal. The operator holds the insulated operating rod and easily connects and disconnects it from the hook-shaped current clamp via a Phillips head adapter, ensuring operational insulation safety. The hook-shaped current clamp is equipped with a jaw opener / closer for quick attachment to the line under test. The universal adjustable light provides sufficient illumination for testing in complex environments. During testing, the spatial location information and voltage level of the line are transmitted to the mobile terminal for recording in real time. If the voltage exceeds a preset threshold, the mobile terminal promptly triggers an alarm. Furthermore, the device's charging terminal can power the main unit, ensuring continuous and stable operation of the equipment.

[0042] In one exemplary embodiment, such as Figure 1 As shown, a wireless current meter is provided, including: a hook-shaped current clamp 100, a Phillips head adapter 200, an insulating operating rod 300, and a jaw opener / closer 400. The first end of the hook-shaped current clamp 100 is bent to form a U-shaped jaw, used to collect line current and convert it into an electrical signal when the corresponding area of ​​the U-shaped jaw is closed. The Phillips head adapter 200 is used to connect or disconnect the hook-shaped current clamp 100 from the insulating operating rod 300. The insulating operating rod 300 is configured to transmit the operating force it bears to the hook-shaped current clamp 100 when connected to it via the Phillips head adapter 200. The jaw opener / closer 400 is fixed to one side surface of the U-shaped jaw and is configured to open the corresponding area of ​​the U-shaped jaw under the operating force transmitted by the insulating operating rod 300; and to close the corresponding area of ​​the U-shaped jaw in a preset state.

[0043] Optionally, the U-shaped jaws of the hook-shaped current clamp 100 are essentially openable current transformers. When the U-shaped jaws are closed, the circuit under test is surrounded by the jaws, and the alternating current in the circuit generates an alternating magnetic field. This magnetic field passes through the iron core inside the current clamp (the metal material of the U-shaped jaws), causing the coil wound on the iron core to induce an alternating voltage / current signal proportional to the circuit current. This converts the high-current circuit signal into a detectable electrical signal, providing a data foundation for subsequent wireless transmission, display, and other processes. The insulated operating rod 300, as a force transmission carrier, is rigidly connected to the hook-shaped current clamp 100 via a plum blossom adapter 200. The manual operating force (such as pushing, pulling, or rotating force) borne by the operating rod is directly transmitted to the hook-shaped current clamp 100 through the mechanical rigid connection of the adapter, providing a power source for the opening and closing of the jaws. The jaw opener / closer 400 has a built-in elastic reset mechanism (such as a spring) and a locking mechanism, forming a preset state control logic. When the operating force is transmitted to the jaw opener 400, the external force overcomes the preload of the elastic reset mechanism and drives the moving part of the jaw opener to move, thereby opening the closed end of the U-shaped jaw and realizing the jaw opening; when the external force is removed, the restoring force of the elastic reset mechanism pushes the moving part to reset, and the locking mechanism triggers the preset closed state, so that the U-shaped jaw closes again, ensuring the stability of the magnetic field environment for current acquisition.

[0044] Specifically, the operator applies an operating force (such as axial thrust or rotational force) to the insulating operating rod 300. Since the insulating operating rod 300 is rigidly connected to the plum blossom adapter 200, and the adapter is rigidly locked to the hook-shaped current clamp 100, the operating force is transmitted without loss from the operating rod to the jaw opener 400 on the hook-shaped current clamp 100 through rigid mechanical transmission. The multi-tooth meshing design of the plum blossom adapter 200 increases the friction and contact area of ​​the connection surface, avoids slippage or force deviation during transmission, and ensures the accuracy of force transmission. The jaw opener 400 is the mechanical transmission actuator, which is linked to the closed end of the U-shaped jaw. The transmission process is divided into two stages: jaw opening stage: When the operating force is transmitted to the jaw opener 400, the linkage mechanism or cam mechanism inside the opener converts the operating force into a pushing force on the closed end of the U-shaped jaw, overcoming the closing pre-tightening force of the jaw, causing the open end of the U-shaped jaw to separate, forming an opening space that can be fitted into the circuit. Jaw Closure Stage: When the operator removes the external force applied to the insulating operating rod 300, the elastic reset mechanism (such as torsion spring or compression spring) built into the jaw opener 400 releases elastic potential energy, pulls the connecting rod or cam to reset through reverse transmission, and drives the open end of the U-shaped jaw to re-close. At the same time, the locking mechanism is locked into the preset position, so that the jaw remains in a stable closed state, ensuring the magnetic circuit of the current transformer is closed.

[0045] The aforementioned wireless current meter, by employing an insulated operating rod and connecting to the current clamp via a plum blossom adapter, allows operators to complete the jaw opening and closing and current acquisition operations from a safe distance away from live lines. This avoids the risk of electric shock from direct contact with high-voltage lines and is suitable for live-line inspection scenarios of high and low voltage distribution lines. The preset closed state of the jaw opener, combined with the locking mechanism, ensures a tight fit after the U-shaped jaws are closed, enabling rapid measurement of line current and preventing magnetic circuit leakage due to jaw gaps. This ensures the sensing accuracy of the current transformer and makes the measurement data more accurate. At the same time, the stable closed state prevents the jaws from accidentally opening during the measurement process, improving the reliability of the measurement process.

[0046] In one exemplary embodiment, it remains as follows Figure 1 As shown, it also includes a power supply mechanism 500. The power supply mechanism 500 includes a power interface 510 and a power switch 520; the power interface 510 and the power switch 520 are fixed to one side surface of the second end of the hook-shaped current clamp 100; the power interface 510 is used to connect the power supply and the hook-shaped current clamp 100 to provide power; the power switch 520 is used to select whether the power supply and the hook-shaped current clamp 100 are connected or disconnected.

[0047] Optionally, the power switch 520 acts as a control valve for the power supply path, operating based on circuit on / off control logic: when the switch is in the on state, the power supply and the active module inside the hook-shaped current clamp form a closed loop, and electrical energy is continuously supplied; when the switch is in the off state, the loop is interrupted, and the active module stops working. The power interface 510 acts as a bridge for power input / replenishment, matching the voltage and current specifications of external power sources (such as charging adapters and lithium battery packs) through standardized interface pin definitions, ensuring that the input power is consistent with the rated parameters of the internal circuit of the hook-shaped current clamp, and avoiding damage to components due to overvoltage or overcurrent. The power supply mechanism 500 can have a built-in power supply or an external power supply. After being connected through the power interface 510, the input power will pass through the internal voltage regulation and filtering circuits to convert the input power into a stable DC voltage that meets the working requirements of the signal processing module, ensuring the processing accuracy of the current signal and avoiding measurement errors caused by voltage fluctuations.

[0048] The power switch 520 is a mechanical contact switch (common types include push-button and toggle types), which internally contains a moving contact, a stationary contact, and a resilient reset component (such as a spring). When an operator applies mechanical force (pressing or toggling) to the switch, the external force is transmitted through the operating end of the switch to the internal moving contact, causing the moving contact to displace. The external force drives the moving contact to make close contact with the stationary contact, closing the circuit between the power supply and the internal circuit of the hook-shaped current clamp, and power transmission begins. When the external force is removed, the restoring force of the internal resilient reset component pushes the moving contact to reset, causing the moving and stationary contacts to separate, interrupting the circuit, and stopping power transmission. The power interface 510 and the power switch 520 are fixed to the second end surface of the hook-shaped current clamp 100, a position far from the U-shaped jaws and jaw opener 400, avoiding interference from the mechanical action of jaw opening and closing on the power supply mechanism 500, and ensuring the independence of mechanical transmission and circuit control.

[0049] In this embodiment, by controlling the on / off state of the power switch, the power supply to the active module can be cut off during non-measurement periods, avoiding energy waste, reducing the frequency of charging or power replacement, and lowering the maintenance cost and failure rate of the equipment.

[0050] In one exemplary embodiment, it remains as follows Figure 1 As shown, it also includes: a lighting mechanism 600. The lighting mechanism 600 includes a lighting module 610 and a lighting switch 620; the lighting module 610 and the lighting switch 620 are fixed to one side surface of the second end of the hook-shaped current clamp; the lighting module 610 is used to provide illumination; the lighting switch 620 is used to select whether the illumination of the lighting module 610 is turned on or off.

[0051] Optionally, the core component of the lighting module 610 is an LED light source. When current passes through the PN junction of the LED, electrons and holes recombine, releasing photon energy and directly converting the electrical energy supplied by the power supply mechanism into visible light. The module also has a built-in constant current drive circuit, which can stably control the input current, preventing unstable brightness due to voltage fluctuations, and preventing overcurrent from burning out the LED light source, thus ensuring the reliability of the lighting function. The lighting switch 620 and the power switch 520 are connected in parallel control logic. When the power switch 520 is in the ON state, the power supply provides power to the active modules of the entire device. At this time, operating the lighting switch 620 allows for independent control of the lighting module's circuit loop: the LED lights up when the switch is closed, and the LED turns off when the switch is open. When the power switch 520 is in the OFF state, the active modules of the entire device are de-energized, and even if the lighting switch 620 is closed, it cannot drive the lighting module, avoiding energy waste caused by turning on the lighting alone. The lighting module 610 is fixed to the second end surface of the hook-shaped current clamp. Its lighting direction is adjustable, so that the light is focused on the circuit under test and the opening and closing position of the clamp jaws, solving the problem of not being able to see the circuit clearly in dim environments and not being able to accurately fit the clamp jaws.

[0052] In one exemplary embodiment, such as Figure 2 As shown, it also includes a ranging mechanism 700. The ranging mechanism 700 is located on one side surface of the second end of the hook-shaped current clamp 100, and is used to collect height information when the area corresponding to the U-shaped jaws is closed.

[0053] Optionally, the operator transmits force through the insulated operating rod to drive the jaw opener to close the U-shaped jaws. When the jaws are closed, the hook-shaped current clamp 100 detects the current data. At the same time, the ranging mechanism 700 simultaneously detects the height information of the ammeter from the ground. Combined with the current latitude and longitude information, the line is located. Furthermore, the data can be transmitted to the mobile terminal for recording in real time, ensuring the accuracy and integrity of the data and facilitating subsequent analysis and processing.

[0054] In one exemplary embodiment, such as Figure 3 As shown, a control system for a wireless current meter is provided, including a power supply module 302, a data acquisition unit 304, and a control unit 306. The power supply module 302 converts external power into a preset voltage and provides power to both the control unit 306 and the data acquisition unit 304. The data acquisition unit 304 includes a current reading module for reading the electrical signal output by the wireless current meter. The control unit 306 converts the electrical signal into a current value.

[0055] The power supply module 302 is the energy core of the entire system. Its core function is voltage adaptation and stable supply. After an external power source (such as a lithium battery or external adapter) is connected, the internal DC-DC conversion circuit and voltage regulation and filtering circuit convert the input voltage into the preset voltage required by the system. The converted voltage is output in two paths: one provides a stable operating voltage for the control unit 306; the other provides an adaptation voltage for the data acquisition unit 304, ensuring that each module operates under rated voltage and avoiding acquisition or calculation errors caused by voltage fluctuations. The core of the data acquisition unit 304 is the current reading module, which works in conjunction with the current transformer of the front-end hook-shaped current clamp. When the U-shaped jaws of the hook-shaped current clamp close, the line current is converted into a weak analog electrical signal based on the principle of electromagnetic induction. The current reading module has built-in signal conditioning circuits (such as amplification, filtering, and isolation circuits) to process the weak electrical signal output from the front end: the amplification circuit increases the signal amplitude to a range that the control unit can recognize, the filtering circuit filters out electromagnetic interference noise, and the isolation circuit prevents the strong current side from impacting the weak current acquisition end. The control unit 306 converts the analog electrical signal transmitted by the current reading module into a digital signal through its built-in ADC (analog-to-digital converter). Based on a preset calibration algorithm (such as a linear fitting algorithm), the digital signal value is mapped to the actual line current value. The calculated current value can be further stored locally, uploaded to the terminal via a wireless module, or used to link other functions (such as abnormal current alarm).

[0056] For example, such as Figure 4 As shown, the control unit 306 uses an STM32F103C8T6 microcontroller. This chip features high performance and low power consumption, and can efficiently handle data interaction and logic operations between multiple modules. Figure 4 The crystal oscillator (X1), capacitors (C1, C2), and resistor (R3) on the left side form a high-speed oscillation circuit, providing an 8MHz or 16MHz high-speed clock source to the chip through the PD0 and PD1 pins. After internal frequency multiplication, this signal can output a system clock of up to 72MHz, meeting the needs of high-performance data processing and logic operations. The chip's PC14 and PC15 pins reserve an interface for a 32.768kHz low-speed crystal oscillator, used to drive the built-in real-time clock module, providing accurate timestamps for current, altitude, and position data acquisition, while also supporting timing functions in low-power standby mode. Additionally, resistor (R4), capacitor (C3), and a reset button form a reset circuit connected to the chip's NRST pin. During normal operation, the NRST pin is kept high through a pull-up resistor, ensuring stable system operation. When abnormalities such as program crashes or voltage fluctuations occur, pressing the reset button or triggering the reset chip will pull the NRST pin low, forcing the chip to restart from its initial state, quickly restoring normal operation and improving the device's fault tolerance. The +3.3V power supply is input through the chip's VDD_1, VDD_2, VDD_3 (digital circuit power supply) and VDDA (analog circuit power supply) pins, providing power to functional modules such as the core, GPIO, and ADC. The corresponding VSS_1, VSS_2, VSS_3 (digital ground) and VSSA (analog ground) pins are grounded, forming a complete power supply loop. Figure 4 The capacitors (C10, C11, C12, C13) on the right side are decoupling capacitors, connected in parallel between the power supply and ground. They are used to filter out high-frequency noise in the power supply, ensuring a stable input voltage and preventing voltage fluctuations from causing chip errors or data acquisition deviations. Additionally, the debugging interface, composed of pins such as TCK and TMS, is compatible with the SWD / JTAG debugging protocol and can be connected to debuggers such as ST-Link. During the development phase, it supports program breakpoint debugging and register reading / writing, quickly locating and fixing program errors. During the maintenance phase, new firmware can be burned through this interface to expand functionality or fix bugs without disassembling the device, reducing later maintenance costs.

[0057] For example, power module 302 provides both +5V and +3.3V voltages to the entire system, and also features power sampling and monitoring to ensure safe and stable power supply. An external power supply is connected to the system via interface CN4, and after processing by the core power conversion chip, outputs both +5V and +3.3V. +5V primarily powers peripherals such as the Bluetooth module and laser ranging module; +3.3V is dedicated to powering the STM32 core control unit, meeting the voltage requirements of different modules. The chip's VBAT pin also connects to a backup power supply, which can power critical circuits such as the real-time clock (RTC) in the event of a sudden power outage, preventing data loss. An electrolytic capacitor C3 (100μF) and a ceramic capacitor C4 (100nF) are connected in parallel at the +5V output, and corresponding filter capacitors (C1, C2) are configured at the +3.3V output. The large-capacity electrolytic capacitor filters out low-frequency ripple in the power supply, while the small-capacity ceramic capacitor suppresses high-frequency noise. Together, they achieve smooth voltage regulation, preventing power fluctuations from affecting the normal operation of the chip and peripherals. A voltage divider circuit composed of resistors R1 (470Ω) and R2 (1kΩ) samples the input power supply voltage. The divided voltage signal is transmitted to the STM32's ADC pin via the POWER_ADC pin. The STM32 acquires this voltage value in real time and compares it with a preset threshold to determine if there are any abnormalities such as overvoltage or undervoltage in the power supply. When a power supply abnormality is detected, the system can trigger an alarm to ensure the safety of the device's power supply.

[0058] In an exemplary embodiment, the data acquisition unit 304 further includes a ranging module for acquiring altitude information collected by the wireless current meter.

[0059] For example, the data acquisition unit 304 encompasses two core functions: current reading and distance measurement. The control unit 306 coordinates and controls the data acquisition, transmission, and processing. The current reading circuit is connected to the current probe via the CN3 interface. The STM32 controls the current acquisition action of the probe through corresponding I / O pins. The acquired current signal is conditioned and then transmitted to the core chip to complete the accurate reading of the current value. The distance measurement module is connected to the corresponding pin of the STM32 via a dedicated interface. The chip outputs a control signal to start the distance measurement function. The measured spatial data such as the height and depth of the line are transmitted back to the core unit in real time, and the line position is accurately located in conjunction with latitude and longitude positioning.

[0060] In one exemplary embodiment, such as Figure 3 As shown, the system also includes a communication unit 308, which is connected to the control unit 306 and is used to send alarm signals.

[0061] For example, such as Figure 5As shown, the TB-04 Bluetooth module is used as the wireless communication unit to transmit the collected data to the receiver, while also supporting command interaction. The RXD and TXD pins of the Bluetooth module are connected to the corresponding pins of the STM32 chip via RXD3 and TXD3 to establish a UART serial communication link, enabling bidirectional data transmission. The Bluetooth module is connected to a +3.3V power supply, with capacitors C9 (100nF) and C8 (100uF) connected in parallel for filtering to reduce signal interference during communication and ensure data transmission stability.

[0062] In one exemplary embodiment, the control unit 306 is also configured to trigger an alarm signal when the current value exceeds a preset threshold.

[0063] Optionally, the current reading module and ranging module transmit the processed current data to the control unit 306 via wireless communication (such as Bluetooth or LoRa). The current safety threshold range (including the maximum set value) is pre-written into the STM32 chip through the receiver's interface. This threshold can be flexibly adjusted according to the rated load of different lines and is stored in the chip's flash memory. The control unit 306 reads the received current value at a preset frequency (e.g., once per second) and compares it in real time with the built-in maximum set value. When the current value is detected to continuously exceed the maximum set value (a de-jitter delay can be set to avoid false triggering due to instantaneous fluctuations), it immediately outputs high and low level control signals through the GPIO pins: one signal is sent to the sound unit of the audible and visual alarm module, and the other is sent to the light-emitting unit. The audible and visual alarm module typically includes a buzzer (sound-emitting unit) and an LED warning light (light-emitting unit), both driven by the GPIO signals of the control unit 306. When the chip of the control unit 306 outputs a high-level signal, the buzzer's drive circuit is activated, causing the electromagnetic coil inside the buzzer to vibrate and drive the diaphragm to emit a continuous or intermittent warning sound. The synchronously output control signal triggers the LED warning light's drive circuit, causing the LED to flash at a preset frequency (e.g., 1Hz), emitting a conspicuous red or yellow light. When the current value falls back to within the safe threshold, the output control signal stops, and the audible and visual alarm module automatically stops working, achieving real-time early warning of abnormal current and shortening fault handling time.

[0064] In one exemplary embodiment, the control unit 306 is also configured to locate the route based on altitude information and latitude and longitude information.

[0065] Optionally, latitude and longitude information is obtained by a mobile device (such as an inspection terminal or mobile phone) via a GPS / BeiDou satellite positioning module and transmitted to the control unit in real time via wireless communication. Altitude information is measured by the ranging module integrated into the ammeter, measuring the vertical height from the meter body to the ground. This data is collected synchronously with the current data and transmitted to the control unit 306. The control unit 306 timestamps both sets of data to ensure a one-to-one correspondence between latitude, longitude, and altitude information, avoiding data misalignment. It then merges the latitude and longitude (geographic coordinates) with the altitude information (vertical coordinates) to generate the three-dimensional spatial coordinates (longitude, latitude, altitude) of the line. Since the ranging module measures the height from the meter body to the ground, the control unit 306, in conjunction with the structural parameters of the hook-shaped current clamp, further calculates the actual overhead height of the line to ensure positioning accuracy.

[0066] In one exemplary embodiment, the control unit 306 is also configured to control the illumination of the wireless current meter upon receiving a nighttime operation instruction.

[0067] Optionally, operators can select a nighttime operation mode or directly issue on / off commands to the lighting via the interface of a receiver (such as a matching inspection terminal or handheld remote control). The receiver transmits the commands to the control unit 306 via a wireless communication module in a preset communication protocol format, enabling human-machine interaction and remote control. The control unit 306 captures the command signals sent by the receiver through its built-in wireless communication receiving module and transmits them to the STM32 kernel for parsing. When it confirms that the command is to turn on the nighttime operation lighting, the STM32 kernel outputs the corresponding control signal; if it is to turn off the lighting, the control signal output is cut off. By setting the PWM (Pulse Width Modulation) output function of the I / O pins through programming, the brightness of the searchlight can be adjusted to adapt to different levels of darkness in the working environment, improving the accuracy of nighttime operation and reducing measurement errors.

[0068] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0069] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A wireless current meter, characterized in that, include: A hook-shaped current clamp, wherein the first end of the hook-shaped current clamp is bent to form a U-shaped jaw, which is used to collect the line current when the area corresponding to the U-shaped jaw is closed, and to convert the line current into an electrical signal; A plum blossom adapter is used to connect or disconnect the hook-shaped current clamp from the insulating operating rod; An insulated operating lever is configured to transmit the applied operating force to the hook-shaped current clamp when connected to the hook-shaped current clamp via the plum blossom adapter. A jaw opener, fixed to one side surface of the U-shaped jaws, is configured to open the area corresponding to the U-shaped jaws under the action of the operating force transmitted by the insulating operating rod; And when in a preset state, close the area corresponding to the U-shaped jaws.

2. The wireless current meter according to claim 1, characterized in that, Also includes: A power supply mechanism includes a power interface and a power switch; the power interface and the power switch are fixed to one side surface of the second end of the hook-shaped current clamp. The power interface is used to connect the power supply to the hook-shaped current clamp to provide power; the power switch is used to select whether to turn the power supply to the power supply or to turn off the hook-shaped current clamp.

3. The wireless current meter according to claim 1, characterized in that, Also includes: Lighting mechanism, including lighting modules and lighting switches; The lighting module and the lighting switch are fixed to one side surface of the second end of the hook-shaped current clamp; The lighting module is used to provide illumination; the lighting switch is used to select whether to turn the lighting module on or off.

4. The wireless current meter according to claim 1, characterized in that, Also includes: The ranging mechanism is located on one side surface of the second end of the hook-shaped current clamp and is used to collect height information when the area corresponding to the U-shaped jaws is closed.

5. A control system for a wireless current meter, characterized in that, Applied to the wireless current meter according to any one of claims 1 to 4; comprising: The power module is used to convert external power into a preset voltage and provide power to the control unit and the data acquisition unit respectively. The data acquisition unit includes a current reading module; the current reading module is used to read the electrical signal output by the wireless current meter. A control unit is used to convert the electrical signal into a current value.

6. The control system for the wireless current meter according to claim 5, characterized in that, The data acquisition unit also includes: The ranging module is used to acquire the altitude information collected by the wireless current meter.

7. The control system for the wireless current meter according to claim 5, characterized in that, Also includes: A communication unit, connected to the control unit, is used to send alarm signals.

8. The control system for the wireless current meter according to claim 5, characterized in that, The control unit is also used to trigger an alarm signal when the current value exceeds a preset threshold.

9. The control system for the wireless current meter according to claim 6, characterized in that, The control unit is also used to locate the route based on the altitude and latitude / longitude information.

10. The control system for the wireless current meter according to claim 5, characterized in that, The control unit is also used to control the illumination of the wireless current meter when a night operation instruction is received.

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