Transformer substation sling protection system

Abstract

The invention relates to the technical field of power equipment construction, in particular to a transformer substation sling protection system which comprises a power supply module, a main control core module, a distance monitoring module, a signal conditioning circuit, an alarm driving circuit and a limiting control circuit. The power supply module is electrically connected with the master control core module, the distance monitoring module, the alarm driving circuit and the limiting control circuit and supplies power to the master control core module, the distance monitoring module, the alarm driving circuit and the limiting control circuit, the system body including the master control core module and the distance monitoring module is fixed to the middle section of a crane jib and the position 1.5-2 m away from the tail end of the jib through an adjustable clamp, and it is ensured that a sensor is not shielded and directly faces an electrified equipment area; according to the system, the problems of manual control errors and response lag are avoided from the source through multi-dimensional accurate distance measurement and graded alarm setting, and the modular design and strong environment adaptability of the system can be quickly adapted to operation scenes of various swing arm type machines and tools and transformer substations with different voltage grades. And the continuous safety guarantee requirement of long-time high-risk operation is met.

Description

Technical Field

[0001] This invention relates to the field of power equipment construction technology, and in particular to a substation sling protection system. Background Technology

[0002] In outdoor substation operations within the power industry, processes such as equipment hoisting, installation, and repair rely on jib cranes and aerial work platforms. These operations are characterized by complex environments and stringent safety requirements, especially in substations with voltage levels ranging from 10kV to 500kV, where live equipment is densely distributed and working space is limited, placing extremely high demands on the safe distance management between equipment and live equipment.

[0003] In existing technologies, safety distance control in substation operations mainly relies on traditional manual methods, lacking targeted intelligent control measures. Outdoor substations are completely open environments, and the operating radius of machinery booms is significantly limited by the site. Traditional solutions rely on manual on-site surveys to delineate the operating range, which is difficult to adapt to complex site layouts and is prone to deviations in range definition. Furthermore, relying on operators' visual judgment of the distance between machinery and live equipment is affected by factors such as ambient light, observation angle, and human negligence, making it difficult to consistently meet the safety distance requirements for equipment of different voltage levels in industry safety standards. There is a risk of accidental contact with live equipment. At the same time, existing simple early warning devices can only provide single distance indications and lack linkage limit functions. Even if a risk of exceeding the limit is detected, a stop signal still needs to be manually transmitted, resulting in a delayed response and potentially leading to serious consequences such as large-scale power outages, personal injury, or equipment damage.

[0004] The aforementioned problems not only restrict the efficiency and safety of substation operations but also increase the risks and costs of power grid operation, necessitating a smart and highly adaptable safety management and control system to address them. Summary of the Invention

[0005] The purpose of this invention is to provide a substation sling protection system, which aims to solve the problem of... The above-mentioned technical problems are solved by the following technical solution: The present invention proposes the following technical solution: a substation sling protection system, which includes a power supply module, a main control core module, a distance monitoring module, a signal conditioning circuit, an alarm driving circuit, and a limit control circuit. The power supply module is electrically connected to and supplies power to the main control core module, the distance monitoring module, the alarm driving circuit, and the limit control circuit respectively. The distance monitoring module is connected to the signal input interface of the main control core module through a signal conditioning circuit; The control output interface of the main control core module is connected to the alarm drive circuit and the limit control circuit; the limit control circuit is connected to the external machine control system.

[0006] In a preferred embodiment of the substation sling protection system of the present invention, the power supply module includes a lithium battery pack, a waterproof charging interface, a charging management chip, a low-voltage protection circuit, a voltage regulator module, a linear voltage regulator chip, and a filter capacitor bank.

[0007] In a preferred embodiment of the substation sling protection system of the present invention: the lithium battery pack is connected to the charging management chip through a waterproof charging interface; the charging management chip, low-voltage protection circuit, voltage regulator module, and linear voltage regulator chip are connected in series; and the filter capacitor group is connected in parallel to the output terminal of the lithium battery pack, the output terminal of the voltage regulator module, and the output terminal of the linear voltage regulator chip, respectively.

[0008] In a preferred embodiment of the substation sling protection system of the present invention: the main control core module includes a main control chip, a clock circuit, a reset circuit, a BOOT circuit, and a button circuit; The clock circuit includes a high-speed crystal oscillator circuit and a low-speed crystal oscillator circuit, which are respectively connected to the corresponding clock pins of the main control chip. The reset circuit consists of a current-limiting resistor, a capacitor, and a tactile button connected in series to the reset pin of the main control chip. The BOOT circuit connects the BOOT pin of the main control chip to the power supply voltage through a pull-up resistor, and uses the interface to switch the startup mode. The button circuit connects the tactile button to the corresponding pin of the main control chip through a pull-up resistor, and the other end of the button is grounded.

[0009] In a preferred embodiment of the substation sling protection system of the present invention: the distance monitoring module includes an electromagnetic induction sensor and a radar module; The output terminal of the electromagnetic induction sensor is connected to the signal conditioning circuit. The radar module communicates with the main control core module through a serial communication interface or a bus communication interface, and is connected to the corresponding pins of the main control chip.

[0010] In a preferred embodiment of the substation sling protection system of the present invention: the signal conditioning circuit includes an RC filter circuit and a current-limiting resistor. The RC filter circuit consists of a resistor and a capacitor. The analog signal output by the electromagnetic induction sensor is filtered by the RC filter circuit and then connected to the analog signal input pin of the main control chip through the current-limiting resistor.

[0011] In a preferred embodiment of the substation sling protection system of the present invention: the alarm driving circuit includes a driving chip and at least two distributed alarm units, each alarm unit consisting of a warning light and a sound-emitting element; The input terminal of the driver chip is connected to the corresponding pin of the main control chip, and the output terminal is connected to each alarm unit. The warning light is connected in series with a current-limiting resistor, and the sound-emitting element is directly connected to the output terminal of the driver chip. Each alarm unit is deployed in a different position on the machine.

[0012] In a preferred embodiment of the substation sling protection system of the present invention: the limit control circuit includes a relay drive module and a bus communication module; The relay drive module consists of a relay, a transistor, a current-limiting resistor, and a freewheeling diode. The base of the transistor is connected to the corresponding pin of the main control chip through the current-limiting resistor, the collector is connected to the relay coil, and the freewheeling diode is connected in parallel across the relay coil. The bus communication module includes a bus controller and a bus transceiver. The controller is connected to the corresponding pin of the main control chip through a communication interface. The controller is connected to the transceiver, and the transceiver is connected to the machine bus through a terminating resistor.

[0013] In a preferred embodiment of the substation sling protection system of the present invention, a visualization and communication interface circuit is further included, wherein the visualization and communication interface circuit includes a display module and a wireless communication module; The display module is connected to the corresponding pin of the main control chip via a communication interface; the wireless communication module is connected to the corresponding pin of the main control chip via a serial communication interface to realize data interaction and remote control.

[0014] In a preferred embodiment of the substation sling protection system of the present invention: the main control chip of the main control core module has a built-in safety standard threshold library, which stores the safety distance threshold and warning threshold corresponding to different voltage levels. The threshold can be manually modified and stored in the chip storage unit through the button circuit or communication module. The chip synchronously collects and processes two distance monitoring signals according to a set period, and outputs control commands after comparing them with the preset threshold.

[0015] The beneficial effects of this invention are as follows: This system avoids the problems of human control error and response lag from the source by using multi-dimensional accurate ranging and hierarchical alarm settings. Its modular design and strong environmental adaptability can be quickly adapted to various swing arm machines and substation operation scenarios of different voltage levels, meeting the continuous safety guarantee requirements of long-term high-risk operations. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments of the present invention will be briefly described below. Obviously, the drawings described below only relate to some embodiments of the present invention and are not intended to limit the present invention. Wherein: Figure 1 This is a schematic diagram of the main control core module in this invention.

[0017] Figure 2 This is a schematic diagram of the main control power supply in this invention.

[0018] Figure 3 This is a schematic diagram of the reset circuit in this invention.

[0019] Figure 4 This is a schematic diagram of the program burning circuit in this invention.

[0020] Figure 5 This is a schematic diagram of the BOOT circuit in this invention.

[0021] Figure 6 This is a schematic diagram of the button circuit in this invention.

[0022] Figure 7 This is a schematic diagram of the low-speed crystal oscillator circuit in this invention.

[0023] Figure 8 This is a schematic diagram of the power supply filtering circuit in this invention. Detailed Implementation

[0024] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0025] The terminology used in this invention is that which is currently widely used in the art in consideration of the function of the invention; however, these terms may vary according to the intent of those skilled in the art, precedent, or new technology in the art. Furthermore, specific terms may be chosen by the applicant, and in such cases, their detailed meanings will be described in the detailed description of the invention. Therefore, the terms used in this specification should not be construed as simple names, but rather based on their meanings and the overall description of the invention.

[0026] Example 1, referring to Figures 1 to 8 This embodiment provides a substation sling protection system. Specifically, it is applied to conventional substations with voltage levels of 220kV and below, for equipment hoisting and maintenance, using a 16-ton or larger crane, in a sunny, open outdoor area free from strong electromagnetic interference, with a working time of ≤8 hours. The system includes a power supply module, a main control core module, a distance monitoring module, a signal conditioning circuit, an alarm drive circuit, and a limit control circuit. The power supply module is electrically connected to and supplies power to the main control core module, the distance monitoring module, the alarm drive circuit, and the limit control circuit. The main body of the system, including the main control core module and the distance monitoring module, is fixed to the middle section of the crane boom using adjustable clamps, 1.5-2 meters from the end of the boom, ensuring that the sensors are unobstructed and facing the area of ​​live equipment, such as busbars and circuit breakers. The distance monitoring module is connected to the signal input interface of the main control core module through a signal conditioning circuit; The control output interface of the main control core module is connected to the alarm drive circuit and the limit control circuit; the limit control circuit is connected to the external machine control system.

[0027] Furthermore, the power supply module includes a lithium battery pack, a waterproof charging interface, a charging management chip, a low-voltage protection circuit, a voltage regulator module, a linear voltage regulator chip, and a filter capacitor bank. The power supply module consists of a 12V / 10Ah 18650 ternary lithium battery pack, a Type-C waterproof charging interface, a TP4056 charging management chip, an LM393 low-voltage protection circuit, an MP1584 DC-DC voltage regulator module, an AMS1117-3.3V LDO linear voltage regulator chip, and a filter capacitor bank. The charging current of the power supply module is set to 1A, the low-voltage protection threshold is set to 10.8V, the output voltage of the DC-DC voltage regulator module is calibrated to 3.3V±0.05V, and all filter capacitors are installed in place, with an input of 1000μF+0.1μF and an output of 100nF.

[0028] Furthermore, the lithium battery pack is connected to the charging management chip via a waterproof charging interface. The charging management chip, low-voltage protection circuit, voltage regulator module, and linear voltage regulator chip are connected in series. The filter capacitor group is connected in parallel to the output terminal of the lithium battery pack, the output terminal of the voltage regulator module, and the output terminal of the linear voltage regulator chip, respectively.

[0029] Furthermore, the main control core module includes a main control chip, a clock circuit, a reset circuit, a BOOT circuit, and a button circuit. The main control core module consists of an STM32F407VET6 main control chip, an 8MHz high-speed crystal oscillator + 15pF capacitor C15 / C16, a 32.768kHz low-speed crystal oscillator + 18pF capacitor C22 / C23, a 1kΩ current-limiting resistor + 2.2uF capacitor C14 + a tactile button forming a reset circuit, a 10kΩ pull-up resistor R13 + a PZ254V-11-05P interface forming a BOOT circuit, and a 10kΩ pull-up resistor + a tactile button forming a button circuit. The clock circuit includes a high-speed crystal oscillator circuit and a low-speed crystal oscillator circuit, which are respectively connected to the corresponding clock pins of the main control chip. The high-speed crystal oscillator frequency of the main control core module is confirmed to be 8MHz, the low-speed crystal oscillator frequency is 32kHz, the reset circuit anti-bounce time is set to 20ms, and the BOOT mode is set to Flash boot. The reset circuit consists of a current-limiting resistor, a capacitor, and a tactile button connected in series to the reset pin of the main control chip. The BOOT circuit connects the BOOT pin of the main control chip to the power supply voltage through a pull-up resistor, and uses the interface to switch the startup mode. The button circuit connects the tactile button to the corresponding pin of the main control chip through a pull-up resistor, and the other end of the button is grounded.

[0030] Furthermore, the distance monitoring module includes an electromagnetic induction sensor and a radar module. The electromagnetic induction sensor of the distance monitoring module is calibrated to a sensing range of 10kV-220kV, the radar module sampling frequency is set to 10Hz, the ranging range is limited to 0.5-50 meters, and the protection level is confirmed to reach IP65. The distance monitoring module consists of a JS-8 type 10kV-500kV electromagnetic induction sensor and a TF-Luna type FMCW radar module. The output terminal of the electromagnetic induction sensor is connected to the signal conditioning circuit. The radar module communicates with the main control core module through a serial communication interface or a bus communication interface, and is connected to the corresponding pins of the main control chip.

[0031] Furthermore, the signal conditioning circuit consists of an RC filter circuit composed of a 1kΩ resistor and a 10uF capacitor, and a 10kΩ current-limiting resistor. The RC filter circuit is composed of a resistor and a capacitor. The analog signal output by the electromagnetic induction sensor is filtered by the RC filter circuit and then connected to the analog signal input pin of the main control chip through the current-limiting resistor.

[0032] Furthermore, the alarm driving circuit includes a driving chip and at least two distributed alarm units. Each alarm unit consists of a warning light and a sound-emitting element. The LED current-limiting resistor in the alarm driving circuit has a resistance value of 1kΩ. The first-level alarm volume of the buzzer is set to 60dB, and the second-level alarm volume is set to 85dB. The LED visibility distance is adjusted to ≥200 meters in a sunny outdoor environment. Specifically, the alarm unit includes a ULN2803 Darlington tube array, three distributed alarm units, a high-brightness red LED, and a high-decibel buzzer. The input terminal of the driver chip is connected to the corresponding pin of the main control chip, and the output terminal is connected to each alarm unit. The warning light is connected in series with a current-limiting resistor, and the sound-emitting element is directly connected to the output terminal of the driver chip. Each alarm unit is deployed in a different position on the machine.

[0033] Furthermore, the limit control circuit includes a relay drive module and a bus communication module. The limit control circuit itself includes a 12V single-pole double-throw relay, an S8050NPN transistor, a 1kΩ current-limiting resistor, and a 1N4007 freewheeling diode. The relay operating voltage is set to 12V, the contact output duration is set to 3 seconds, and the freewheeling diode's positive and negative terminals are correctly connected to prevent damage to components from reverse electromotive force. The relay drive module consists of a relay, a transistor, a current-limiting resistor, and a freewheeling diode. The base of the transistor is connected to the corresponding pin of the main control chip through the current-limiting resistor, the collector is connected to the relay coil, and the freewheeling diode is connected in parallel across the relay coil. The bus communication module includes a bus controller and a bus transceiver. The controller connects to the corresponding pin of the main control chip via a communication interface. The controller is connected to the transceiver, which is connected to the machine bus via a terminating resistor. The cab alarm unit is fixed to the left side of the instrument panel via a wall-mounted bracket for easy driver observation. The boom end alarm unit is integrated into the top of the main body shell, facing the same direction as the monitoring module. The slinger's handheld terminal is carried by the slinger via a lanyard and kept powered on. A 12V / 10Ah lithium battery pack is connected to the main unit via an M12 waterproof connector, ensuring the interface is locked to prevent it from falling off due to operational vibration. A charging interface is reserved in the cab for easy mid-operation charging. The relay output is connected to the "boom stop" control interface of the crane control system via a waterproof cable to ensure reliable signal transmission. After connection, the interface continuity is tested. Threshold setting: via the button on the main unit. To select the voltage level, press the "Mode" key briefly to switch to "Voltage Level Selection," then select "220kV." The system will automatically retrieve the preset thresholds from the "Safety Regulations": a warning threshold of 7 meters and a safety threshold of 6 meters. Press and hold the "Confirm" key to save the settings. The display will show that the thresholds have taken effect. Data processing parameters: the main control chip data acquisition cycle is set to 100ms, the average value of the two distance signals is taken as the final monitoring data, and the alarm response delay is set to ≤100ms. The power-on self-test items include sensor communication, power supply voltage, interface connection, and threshold storage. The self-test duration is set to 5 seconds. If the self-test passes, the green light will remain on; if abnormal, the yellow light will flash and the fault type will be announced. This system also has a mechanical protection structure, including an IP65-grade ABS engineering plastic waterproof shell wrapped around the system, and clamps installed on the shell with a clamping range of 50mm-150mm and an adjustable bracket.

[0034] Usage process: First, deploy and debug the system: After connecting the lithium battery pack, the system automatically powers on and enters self-test mode, sequentially testing sensor communication, radar module sending test signals, electromagnetic induction sensor sensing analog voltage, power supply voltage (displaying 12V±0.2V), interface connection, limit interface continuity test, threshold storage, and reading the preset threshold corresponding to 220kV. After the self-test passes, the green light stays on. After the slinger confirms that everything is correct, he notifies the driver to start the operation. The driver slowly rotates the boom, and the slinger observes the real-time distance data through a handheld terminal, adjusts the angle adjustment bracket, and ensures that the radar module and electromagnetic induction sensor are always facing the area of ​​the live equipment, and that the distance data is stable with fluctuations ≤±0.05 meters. During operation, the electromagnetic induction sensor collects the induced signal of the powered equipment every 50ms. After the interference is filtered out by the RC filter circuit, the signal is transmitted to the STM32PA0 pin. The radar module collects distance data every 100ms and sends it to the STM32PA9 / PA10 pin through the UART interface. The main control chip collects the two signals synchronously every 100ms and takes the average value to ensure that the ranging accuracy is ≤ ±0.05 meters. When the monitoring distance is ≤7 meters and the warning threshold is reached, the STM32PB0-PB3 pins output a low level, and the ULN2803 drives the three alarm units to activate the first-level warning—the red LEDs in the cab and at the end of the boom remain constantly lit, the LEDs on the handheld terminal remain constantly lit, and the buzzer sounds an alarm at a medium volume of 60dB, reminding the operator to "approach a safe distance and slow down"; when the distance is ≤6 meters and the safety threshold is reached, the STM32 outputs a pulse signal to trigger the second-level warning—all red LEDs flash at a frequency of 1Hz, and the buzzer switches to a continuous alarm at the maximum volume of 85dB, reminding the operator to "reach a dangerous distance and stop immediately"; If the operation time exceeds 8 hours and the battery voltage is lower than 10.8V, the LM393 low voltage protection circuit will be triggered. The STM32 will automatically cut off the non-core power supply to the handheld terminal and the end-of-arm alarm unit, retaining only the cockpit alarm unit and monitoring function. At the same time, the buzzer will intermittently sound an alarm at a low volume of 30dB, indicating "Low voltage, please charge". After the operation is completed, the operator stops the crane engine, the rigging personnel shuts off the system power, disconnects the lithium battery pack from the main unit, and checks whether the casing of each module is intact, whether the interface is loose, and whether the cables are damaged. Release the adjustable clamp, remove the main unit, alarm unit and lithium battery pack, clean the surface dust and debris, and put them into a special protective box. Store the lithium battery pack separately and recharge it to ensure sufficient power for the next operation. When the distance is ≤6 meters, the STM32PB4 pin outputs a high level for 3 seconds, turning on the S8050 transistor, energizing the relay, and outputting a limit signal to the crane control system. The crane boom automatically stops moving beyond the limit to avoid touching live equipment. After 3 seconds, the signal automatically disconnects, and the operator needs to adjust the boom to a safe distance. When the distance is >6 meters, press the "reset" button on the handheld terminal to release the limit before continuing the operation.

[0035] Example 2, refer to Figures 1 to 8 This is the second embodiment of the present invention. Unlike the previous embodiment, this embodiment is specifically applied to: a 500kV voltage level substation, the operation type is single busbar rotational power outage construction, the first level of power grid risk, the equipment is a 50-ton large crane, the operation environment is an outdoor open area, which may be subject to rain, snow and dust interference, and the operation time is 7-15 days. This system also includes a visualization and communication interface circuit, which includes a display module and a wireless communication module. The display module is connected to the corresponding pin of the main control chip through a communication interface; the wireless communication module is connected to the corresponding pin of the main control chip through a serial communication interface to realize data interaction and remote control. Furthermore, the main control chip of the main control core module has a built-in safety standard threshold library, which stores the safety distance threshold and warning threshold corresponding to different voltage levels. The threshold can be manually modified and stored in the chip's storage unit through the button circuit or communication module. The chip synchronously collects and processes two distance monitoring signals according to a set cycle, and outputs control commands after comparing them with the preset threshold.

[0036] Usage process: First, test the equipment. Pair the system with the mobile phone via Bluetooth APP, input the distribution information of live equipment in the work area, and the system automatically generates a simulation graphic of the work area. After the management personnel confirm that the graphic is consistent with the site, lock the work boundary, place a calibration target outside the safe distance of the live equipment, and the radar module and electromagnetic induction sensor collect distance data at the same time. Compare with the actual distance and fine-tune the sensor parameters to ensure that the ranging error is ≤ ±0.05 meters. Save the calibration data through the APP, and the system will automatically apply it to subsequent ranging. In the scenario of simulating a distance ≤ 8 meters, the system triggers a level 2 alarm and outputs a relay signal and CAN bus command. The crane boom immediately stops moving. After three normal tests, the limit function is confirmed to be reliable. During operation, the main control chip processes distance data every 100ms and displays the real-time distance, risk level, and battery level synchronously on the display screen and Bluetooth APP. Managers can remotely monitor from the control room without on-site supervision. When the distance fluctuates by more than ±0.1 meters, the APP pushes a "signal unstable" prompt, and the slingers check the sensor status on-site. When the distance is ≤9 meters, a Level 1 warning is activated, with the LED constantly lit and a 60dB buzzer sounding. An "early warning reminder" is pushed to the APP. When the distance is ≤8 meters, a Level 2 warning is activated, with the LED flashing and an 85dB buzzer sounding. An "emergency reminder" is pushed to the APP and the trigger time is recorded. At the same time, dual-mode limit signals are output, and the crane boom stops moving beyond the limit. The limit can only be released after the management personnel confirm "evacuation from the danger zone" through the APP. If rain or snow occurs during operation, the radar module's anti-interference function is automatically activated, and the ranging data remains stable with fluctuations ≤±0.1 meters. If the sensor cable is loosened by vibration, the system immediately triggers a "sensor failure" alarm, with the yellow light flashing, the buzzer sounding intermittently, and the operation is suspended. The rigging personnel check the connection and restart the system.

[0037] Example 3, referring to Figures 1 to 8 This is the third embodiment of the present invention. Unlike the previous embodiment, this embodiment is applicable to small substations with voltage levels of 10kV-35kV. The operation type is equipment maintenance and parts replacement. The equipment is an aerial work platform vehicle with a small swing arm. The operation environment is outdoor or semi-outdoor areas. The operation time is ≤4 hours. A single person can complete the deployment and operation. The lightweight system body is fixed to the middle section of the swing arm of the aerial work platform vehicle using a small adjustable clamp. The clamp adopts a quick-locking design and can be fixed without tools. A 5mm thick silicone shock-absorbing pad is added to the bottom.

[0038] Alarm unit deployment: The cockpit alarm unit is affixed to the right side of the instrument panel, and the swing arm end alarm unit is integrated into the main body shell; there is no handheld terminal. The 12V / 5Ah lithium battery pack connects to the main unit via a Type-C waterproof interface, which is easy to plug and unplug. The HC-05 Bluetooth module pairs with the operator's mobile APP without the need for additional wiring. The CAN bus interface connects to the aerial work platform's CAN bus via a simple waterproof connector. The terminating resistor is integrated inside the main unit and does not require additional installation.

[0039] Usage: The operator arrives at the site with the system and lithium battery pack, opens and clamps the adjustable clamp onto the middle section of the aerial work platform boom, and locks the clamp. This can be completed by one person within 15 minutes. Connect the lithium battery pack, and the system will automatically power on and perform a self-test. Once the green light is constantly on, configuration will begin. Turn on Bluetooth on your mobile phone, search for "Intelligent Rigging System" and pair it. Enter the APP, select "10kV Voltage Level," and confirm the warning threshold of 2 meters and the safety threshold of 1.5 meters. The APP will display "Configuration Successful." The operator operates the aerial work platform to slowly rotate the boom, views the real-time distance data through the APP, adjusts the angle of the main unit, ensures that the radar module is facing the area of ​​the live equipment, and fixes the angle adjustment bracket after the data stabilizes. During operation, the electromagnetic induction sensor and radar module synchronously collect distance data. The main control chip processes the data every 100ms and pushes the distance information in real time via Bluetooth APP, which can be viewed by the operator in the cab or on the ground.

[0040] When the distance is ≤2 meters, both alarm units activate the first-level warning, the LED red light stays on, the buzzer sounds at 85dB, and the APP pushes a "warning" prompt; when the distance is ≤1.5 meters, the second-level warning is activated, the LED red light flashes, the buzzer sounds continuously, and at the same time the CAN bus sends a limit command to the aerial work platform control system, and the boom stops moving beyond the limit; after the operator adjusts the boom to >1.5 meters, the alarm is automatically deactivated, and work can continue. After the operation is completed, turn off the system power, disconnect the lithium battery pack, release the adjustable clamp and remove the system. Check whether the main body shell and interface are intact. Charge the lithium battery pack through the Type-C interface and charge it fully in 1 hour. Put the system and battery pack into a small protective bag for easy carrying to the next operation site. Check the number of alarms and limit triggering status of this operation through the APP. No data export is required, and the operation summary can be completed immediately.

[0041] Finally, it should be noted that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways as long as they do not depart from the scope of the present invention.

Claims

1. A substation sling protection system, characterized in that: include, The system includes a power supply module, a main control core module, a distance monitoring module, a signal conditioning circuit, an alarm drive circuit, and a limit control circuit. The power supply module is electrically connected to and supplies power to the main control core module, the distance monitoring module, the alarm drive circuit, and the limit control circuit, respectively. The distance monitoring module is connected to the signal input interface of the main control core module through a signal conditioning circuit; The control output interface of the main control core module is connected to the alarm drive circuit and the limit control circuit; the limit control circuit is connected to the external machine control system.

2. The substation sling protection system as described in claim 1, characterized in that: The power supply module includes a lithium battery pack, a waterproof charging interface, a charging management chip, a low-voltage protection circuit, a voltage regulator module, a linear voltage regulator chip, and a filter capacitor bank.

3. The substation sling protection system as described in claim 2, characterized in that: The lithium battery pack is connected to the charging management chip via a waterproof charging interface. The charging management chip, low-voltage protection circuit, voltage regulator module, and linear voltage regulator chip are connected in series. The filter capacitor group is connected in parallel to the output terminal of the lithium battery pack, the output terminal of the voltage regulator module, and the output terminal of the linear voltage regulator chip, respectively.

4. The substation sling protection system as described in claim 3, characterized in that: The main control core module includes a main control chip, a clock circuit, a reset circuit, a BOOT circuit, and a button circuit. The clock circuit includes a high-speed crystal oscillator circuit and a low-speed crystal oscillator circuit, which are respectively connected to the corresponding clock pins of the main control chip. The reset circuit consists of a current-limiting resistor, a capacitor, and a tactile button connected in series to the reset pin of the main control chip. The BOOT circuit connects the BOOT pin of the main control chip to the power supply voltage through a pull-up resistor, and uses the interface to switch the startup mode. The button circuit connects the tactile button to the corresponding pin of the main control chip through a pull-up resistor, and the other end of the button is grounded.

5. The substation sling protection system as described in claim 4, characterized in that: The distance monitoring module includes an electromagnetic induction sensor and a radar module; The output terminal of the electromagnetic induction sensor is connected to the signal conditioning circuit. The radar module communicates with the main control core module through a serial communication interface or a bus communication interface, and is connected to the corresponding pins of the main control chip.

6. The substation sling protection system as described in claim 5, characterized in that: The signal conditioning circuit includes an RC filter circuit and a current-limiting resistor. The RC filter circuit consists of a resistor and a capacitor. The analog signal output by the electromagnetic induction sensor is filtered by the RC filter circuit and then connected to the analog signal input pin of the main control chip through the current-limiting resistor.

7. The substation sling protection system as described in claim 6, characterized in that: The alarm driving circuit includes a driving chip and at least two distributed alarm units, each of which consists of a warning light and a sound-emitting element. The input terminal of the driver chip is connected to the corresponding pin of the main control chip, and the output terminal is connected to each alarm unit. The warning light is connected in series with a current-limiting resistor, and the sound-emitting element is directly connected to the output terminal of the driver chip. Each alarm unit is deployed in a different position on the machine.

8. The substation sling protection system as described in claim 7, characterized in that: The limit control circuit includes a relay drive module and a bus communication module; The relay drive module consists of a relay, a transistor, a current-limiting resistor, and a freewheeling diode. The base of the transistor is connected to the corresponding pin of the main control chip through the current-limiting resistor, the collector is connected to the relay coil, and the freewheeling diode is connected in parallel across the relay coil. The bus communication module includes a bus controller and a bus transceiver. The controller is connected to the corresponding pin of the main control chip through a communication interface. The controller is connected to the transceiver, and the transceiver is connected to the machine bus through a terminating resistor.

9. The substation sling protection system as described in claim 8, characterized in that: It also includes a visualization and communication interface circuit, which includes a display module and a wireless communication module; The display module is connected to the corresponding pin of the main control chip via a communication interface; the wireless communication module is connected to the corresponding pin of the main control chip via a serial communication interface to realize data interaction and remote control.

10. The substation sling protection system as described in claim 9, characterized in that: The main control chip of the main control core module has a built-in safety standard threshold library, which stores the safety distance threshold and warning threshold corresponding to different voltage levels. The threshold can be manually modified and stored in the chip's storage unit through the button circuit or communication module. The chip synchronously collects and processes two distance monitoring signals according to a set period, and outputs control commands after comparing them with the preset threshold.

Images