Dehydration belt conveyor electronic fence system and method

Abstract

The invention discloses an electronic fence system and method for a dewatering belt conveyor, and relates to the technical field of industrial safety, and the system comprises a laser fence which is arranged along the boundary of a dangerous area of the dewatering belt conveyor, adopts the design of emitting visible light to form a visual barrier, and is used for monitoring the light shielding degree when a person enters the dangerous area in real time; and the alarm host is electrically connected with the laser fence and is used for receiving the shielding signal of the laser fence and performing grading processing, and the alarm host judges the shielding degree based on a preset shielding area threshold value. According to the electronic fence system and method for the dewatering belt conveyor, real-time monitoring and visual protection of a dangerous area of the dewatering belt conveyor are achieved by deploying the visible light laser fence, the safety of an operation area is effectively improved, the risk level can be accurately judged according to the personnel shielding degree through a graded early warning and intelligent linkage mechanism, and the safety of the operation area is improved. And sound-light alarm or equipment shutdown is automatically triggered, so that the timeliness of safety protection is enhanced.

Description

Technical Field

[0001] This invention relates to the field of industrial safety technology, specifically to an electronic fence system and method for a dewatering conveyor belt. Background Technology

[0002] Dewatering belt conveyors, as key equipment for material dewatering in industrial production, are widely used in mining, chemical, and metallurgical industries. Their stable operation directly affects production efficiency and operational safety. Due to the continuous mechanical transmission motion during equipment operation, a hazardous area requiring special protection is formed around the work area. Effectively preventing personnel from accidentally entering this area and causing mechanical injuries is a crucial issue for ensuring production safety. Optimizing relevant protective technologies is of great significance for improving the level of industrial production safety.

[0003] Currently, the industry primarily uses physical barriers such as iron railings to protect hazardous areas of dewatering conveyor belts. While these provide basic safety barriers under normal operating conditions, in actual production scenarios, existing methods struggle to monitor personnel approaching or entering hazardous areas in real time, and cannot provide tiered responses based on personnel interaction with these areas. When personnel accidentally approach or enter, it is often difficult to quickly trigger warnings or equipment control measures, resulting in timeliness and targeted safety protection that fails to fully meet the safety requirements of complex production environments. To address this, we propose an electronic fence system and method for dewatering conveyor belts. Summary of the Invention

[0004] To address the aforementioned technical problems, an electronic fence system and method for dewatering conveyor belts are provided. This technical solution solves the problem that the protection of hazardous areas of dewatering conveyor belts relies heavily on physical isolation facilities. Although these facilities can provide basic safety barriers, they lack real-time monitoring capabilities for personnel approaching or entering the area. They cannot implement graded responses based on the interaction between personnel and hazardous areas, and it is difficult to trigger targeted warnings or equipment control measures in a timely manner when personnel accidentally approach or enter the area. The timeliness and targeting of safety protection need to be further improved.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: An electronic fence system for a dewatering conveyor belt includes: Laser fences are deployed along the boundary of the hazardous area of ​​the dewatering conveyor belt. They are designed to emit visible light to form a visual barrier for real-time monitoring of the degree of light obstruction when personnel enter the hazardous area. The alarm host is electrically connected to the laser fence and is used to receive the occlusion signal of the laser fence and process it in a graded manner: the alarm host judges the degree of occlusion based on a preset occlusion area threshold. When the detected occlusion area of ​​a person's body is less than or equal to the threshold, it is identified as a small area occlusion and outputs a first control signal. When the detected occlusion area is greater than the threshold, it is identified as a large area occlusion and outputs a second control signal. The audible and visual alarm device is connected to the alarm host and issues an on-site audible and visual alarm in response to the first or second control signal. The belt control system is connected to the alarm host, receives the second control signal, and immediately controls the dewatering belt conveyor to stop. The DCS system connects to the alarm host, receives the alarm signal corresponding to the first control signal and the switch signal corresponding to the second control signal, and displays alarm information and equipment status to the operator on the computer interface. The alarm host executes a hierarchical response logic: a small area of ​​obstruction triggers the audible and visual alarm device to sound its horn and simultaneously sends an alarm signal to the DCS system; a large area of ​​obstruction triggers the audible and visual alarm device to sound its horn, sends a stop signal to the belt control system, and sends a switching signal to the DCS system based on the same obstruction event.

[0006] Preferably, the laser fence uses an industrial-grade visible light emitting unit, which is fixed to the guardrail or ground base around the dewatering conveyor by a bracket. The laser beam is arranged in a horizontal direction, and its installation position covers the warning area and danger area boundary on both sides and the end of the dewatering conveyor. The unit spacing is set to a predetermined distance according to the size of the danger area, and the installation structure has the ability to resist equipment vibration and collision displacement.

[0007] Preferably, the alarm control panel is configured with multiple signal input / output interfaces, specifically including: The laser fence signal input interface is used to receive signals from small-area obstruction and signals from large-area obstruction. Wired communication interface for connecting to the DCS system to transmit alarm signals and switch signals; The relay output interface connects to the belt control system to transmit stop commands. The sound and light device drive interface allows for independent control of on-site horns and warning lights; Its signal processing logic is defined as follows: a small area obstruction signal triggers the relay to output an audible and visual start command and an RS485 alarm code; a large area obstruction signal synchronously triggers the relay to output a stop command, an audible and visual start command and an RS485 switch code.

[0008] Preferably, the audible and visual alarm device includes a high-decibel horn and a high-brightness warning light, and its electrical drive circuit is independently connected to the relay output terminal of the alarm host. When the first control signal or the second control signal is received, the audible and visual alarm is immediately activated until the obstruction signal disappears and the alarm host resets it.

[0009] Preferably, the belt control system includes a stop command execution module. This module receives the second control signal from the alarm host through a relay control circuit. The signal input interface is preset to a normally open contact connection. Upon receiving the stop command, the module immediately cuts off the power supply to the dewatering belt and locks the machine in a stop state until it is manually reset.

[0010] Preferably, the DCS system includes: The communication module receives alarm signals and switch signals sent by the alarm host through a wired communication interface; The human-machine interaction module is configured to parse alarm signals to generate pop-up warning messages and parse switch signals to update the equipment shutdown status indicator. The history module stores alarm event times, obstruction types, and device response logs.

[0011] A method for establishing an electronic fence for a dewatering conveyor belt, used to implement the aforementioned electronic fence system for a dewatering conveyor belt, includes the following steps: S1: The visible light laser fence deployed at the boundary of the danger zone is used to monitor the occupancy status of personnel in real time. The laser fence emits visible light beams to form a visual barrier. S2: When the laser fence detects a small area of ​​obstruction, it sends a first signal to the alarm host, triggering the alarm host to execute the first response: activate the audible and visual alarm device to sound the siren on site, and at the same time send an alarm signal to the DCS system to generate warning information on the operation interface; S3: When the laser fence detects a large area of ​​obstruction, it sends a second signal to the alarm host, triggering the alarm host to execute a second response: activate the audible and visual alarm device to sound the alarm, simultaneously send a stop command to the belt control system to control the dewatering belt to stop immediately, and send a switch signal to the DCS system to display the equipment stop status on the operation interface. S4: The system automatically resumes monitoring after personnel leave the obstructed area; The belt control system receives shutdown commands and executes equipment shutdown operations through a relay control circuit, while the DCS system receives alarm signals and switch signals through a communication module and configures pop-up alarms and status recording functions on the human-machine interface.

[0012] Preferably, the deployment of the laser fence in step S1 includes: determining the number of laser fence units based on the length of the hazardous area of ​​the dewatering conveyor belt, installing them at predetermined intervals along both sides and end boundaries of the conveyor belt, with the beams between units forming a continuous protective barrier, and calibrating the height and angle of the laser beams during installation to avoid obstruction by non-human factors.

[0013] Preferably, the execution of the first response in step S2 includes: the alarm host triggers the audible and visual alarm device circuit by closing the relay contacts, and at the same time sends a predefined alarm code to the DCS system through the wired communication interface. After the DCS system parses the code, a "warning area intrusion" prompt box pops up on the operation interface and records the event time.

[0014] Preferably, the execution of the second response in step S3 includes: the alarm host synchronously performing three operations: The closing sound and light device drives the relay contacts; Close the stop command relay contact of the belt control system; Send predefined switch status codes to the DCS system via the wired communication interface; The belt control system immediately cuts off the power supply to the dewatering belt conveyor after detecting that the relay contacts are closed.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: The electronic fence system and method for dewatering conveyor belts proposed in this invention achieves real-time monitoring and visual protection of hazardous areas of the dewatering conveyor belts by deploying visible light laser fences, effectively improving the safety of the work area. Its graded early warning and intelligent linkage mechanism can accurately judge the risk level based on the degree of personnel obstruction and automatically trigger audible and visual alarms or equipment shutdown, significantly enhancing the timeliness and pertinence of safety protection. The deep integration of the system with DCS and belt control system realizes real-time information exchange and remote monitoring, making it easy for operators to grasp the on-site situation in a timely manner and take countermeasures. The system also reduces the false alarm rate and improves the continuity and stability of the production process, providing a comprehensive, efficient and intelligent safety protection solution for dewatering conveyor belts in industrial production. Attached Figure Description

[0016] Figure 1 This is a system framework diagram of the present invention; Figure 2 This is a flowchart of the method of the present invention. Detailed Implementation

[0017] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0018] Reference Figure 1As shown, an electronic fence system for a dewatering conveyor belt constructs a visual protective barrier using laser fences deployed at the boundaries of hazardous areas. This laser fence employs industrial-grade visible light emitting units, whose emitted visible beams clearly mark the safety boundaries, facilitating intuitive identification of the hazardous area. The laser emitting units are securely mounted to the guardrails or ground foundation surrounding the dewatering conveyor belt using robust brackets, ensuring stable installation. The installation location must precisely cover the warning and hazardous area boundaries on both sides and at the ends of the dewatering conveyor belt, forming a continuous protective line.

[0019] Setting the unit spacing is crucial and needs to be planned according to the size of the hazardous area of ​​the specific dewatering conveyor belt. The principle is usually to effectively detect personnel intrusion and avoid excessively large blind spots, generally between 400 mm and 600 mm, to ensure that even small personnel intrusion can be reliably detected.

[0020] The design of the installation structure is particularly important. It must have good resistance to equipment vibration and accidental collision displacement. For example, anti-loosening bolts, shock-absorbing pads, and rigid support materials should be used to ensure that the position and beam direction of the laser emitting unit will not shift under the continuous vibration generated by the operation of the dewatering belt or possible slight external impact, thus maintaining the integrity of the barrier and the detection accuracy.

[0021] The laser beam is laid out horizontally, and its height is usually set at about 700 mm above the ground. This height can effectively detect the torso of people and reduce the risk of accidental obstruction caused by ground debris or low-profile equipment parts.

[0022] During installation, the angle and height of each laser emitting unit must be precisely calibrated to ensure that the beam forms a continuous barrier along the predetermined path. Special care must be taken to avoid accidental beam obstruction caused by non-human factors such as fluttering canvas, splashing mud, or moving parts of the equipment, in order to minimize the false alarm rate.

[0023] As the core processing unit of the system, the alarm control panel establishes a reliable electrical connection with the laser fence, receives obstruction signals emitted by the fence in real time, and performs intelligent hierarchical processing. Its core logic is based on a preset obstruction area threshold to determine the severity of the intrusion.

[0024] This threshold is determined through safety assessments and actual testing, and is typically set as a critical value that can distinguish between intrusion of a partial limb (such as an arm), intrusion of a larger body part (such as a torso), or intrusion of the entire body. When the alarm control panel detects that the obstruction area reported by the laser fence is less than or equal to this preset threshold, it is determined to be a small-area obstruction event, and a first control signal is output; when the detected obstruction area is greater than the preset threshold, it is determined to be a large-area obstruction event, and a higher-level second control signal is output. The alarm control panel is equipped with a rich set of multi-channel signal input and output interfaces to meet system integration requirements: a dedicated laser fence signal input interface is responsible for receiving obstruction signals from the front end; a wired communication interface (such as RS485) is used to connect to the DCS system to transmit alarm signals and switch status signals; a relay output interface is used to connect to the belt control system to transmit emergency stop commands; and an independent audible and visual device drive interface is used to control the operation of on-site audible and visual alarm devices.

[0025] Its internal signal processing logic is precisely defined: upon receiving a signal indicating a small area of ​​obstruction, the alarm host immediately triggers the corresponding internal relay, which closes its contacts to activate the audible and visual alarm device. Simultaneously, it sends a predefined specific alarm code to the DCS system via a wired communication interface (such as RS485). When receiving a signal indicating a large area of ​​obstruction, the alarm host will simultaneously perform several key operations: triggering the audible and visual alarm device to close its relay contacts; triggering the shutdown command relay connected to the belt control system to close its contacts and issue a shutdown command; and simultaneously sending another predefined switch status code to the DCS system via the wired communication interface, indicating a serious intrusion event.

[0026] The audible and visual alarm device is the core of on-site warning, comprising a high-decibel electronic horn and a high-brightness flashing warning light, typically in an integrated design. Its electrical drive circuit is directly and independently connected to the corresponding relay output on the alarm control panel. This design ensures that regardless of whether the alarm control panel outputs a first control signal (small-area obstruction) or a second control signal (large-area obstruction), the audible and visual alarm device will be immediately activated upon receiving the signal, emitting a strong combined audible and visual alarm to effectively alert on-site personnel to the danger. This alarm state will continue until the person causing the obstruction leaves the danger zone, the laser fence beam is restored to unobstructed flow, and the obstruction signal disappears. Only then will the alarm be automatically or manually reset by the alarm control panel and the alarm stopped, with authorization.

[0027] The belt conveyor control system integrates a crucial stop command execution module. This module receives a second control signal from the alarm control unit via a relay control circuit. To ensure maximum safety and fail-safe principles, this signal input interface is typically preset to a "normally open contact" connection. This means that under normal circumstances, i.e., when no large-area obstruction occurs, the contact is open, and the belt conveyor operates normally. Once the alarm control unit detects a large-area obstruction and outputs a second control signal, the corresponding relay contact immediately closes. Upon detecting this contact closure signal, the belt conveyor control system's stop command execution module immediately executes a preset safety action—usually by directly cutting off the power to the dewatering belt conveyor's drive motor or triggering a safety circuit to stop the drive unit, achieving an emergency stop. The stopped state is locked to prevent secondary damage from automatic restart. The equipment can only be restarted after authorized personnel confirm on-site that the danger has passed and manually reset it using a dedicated reset button or switch.

[0028] The DCS (Distributed Control System) acts as a supervisory control platform, connecting to the alarm control unit via its communication module to receive signals. When it receives an alarm signal representing a small area of ​​obstruction (such as a specific RS485 code), the DCS's human-machine interface module parses the signal and generates a prominent pop-up warning message on the operator's computer monitoring interface, such as "Warning: Area Intrusion!", alerting the operator to the situation. Simultaneously, its history module automatically stores the time of occurrence, type (small area obstruction), and system response (audible and visual alarm activation) of the alarm event. When the DCS receives a switch signal representing a large area of ​​obstruction from the alarm control unit (such as another specific RS485 code), the human-machine interface module parses the signal. In addition to generating a higher-level pop-up alarm message (such as "Severe intrusion into dangerous area! Equipment stopped!"), it immediately updates the status indicator of the dewatering conveyor belt on the monitoring screen, clearly displaying it as "stopped." The history module will also record in detail the time of occurrence of this serious event, its type (large-area obstruction), and all response actions taken by the system (audible and visual alarms, belt conveyor shutdown).

[0029] Reference Figure 2 As shown, a method for creating an electronic fence for a dewatering conveyor belt, specifically including the following steps to achieve the above system functions: Visible laser fencing is precisely deployed at the boundary of the hazardous area of ​​the dewatering conveyor belt. The deployment process requires calculating the necessary number of laser fencing units based on the actual length of the hazardous area to ensure comprehensive coverage. Units are installed and fixed along the boundary lines on both sides and ends of the conveyor belt at pre-calculated intervals (as mentioned earlier, 400-600mm). After installation, rigorous calibration is essential to ensure that the laser beams emitted by all units are at the same horizontal height (approximately 700mm) and precisely aligned at the angle, allowing for seamless connection between the beams of adjacent units, forming a continuous and uninterrupted visual protective barrier. During calibration, special attention must be paid to adjusting the beam path to avoid any beam obstruction points caused by equipment operation, material flow, or environmental factors (such as steam, water mist, or floating animals), minimizing false alarms.

[0030] During system operation, the laser fence continuously monitors whether its beam is blocked. When the detected blocked area is less than a preset threshold (e.g., only a small portion of the beam is blocked), it is determined to be a small-area blockage (possibly a localized intrusion) and immediately sends a first signal to the alarm host. Upon receiving this signal, the alarm host executes a first-level response: by closing the corresponding internal relay contact, it connects the power circuit of the audible and visual alarm device, driving the high-decibel horn to sound and the high-brightness warning light to flash, issuing a localized intrusion alarm. Simultaneously, the alarm host sends a specific alarm code representing "small-area blockage / warning" to the DCS system via its wired communication interface (e.g., RS485) according to a predefined communication protocol. After receiving this code, the DCS system's communication module parses it, and a preset warning information window pops up on the operator's workstation interface, such as displaying "Warning: Intrusion detected in the warning area of ​​the dehydration conveyor belt!", and automatically calls the history recording module to accurately record the time of occurrence and event type (warning intrusion) of this event in the system log.

[0031] When the laser fence detects that the obstruction area exceeds a preset threshold (e.g., multiple beams of light are blocked, indicating a large body part or the entire human body has entered), it is determined to be a large-area obstruction (serious intrusion into a dangerous area) and immediately sends a higher-level second signal to the alarm control panel. Upon receiving this signal, the alarm control panel synchronously triggers a second-level response, performing three key operations: Immediately close the drive relay contacts of the audible and visual alarm device to activate a strong on-site audible and visual alarm (siren + flashing light). Immediately close the stop command relay contact that is specifically connected to the belt control system to issue an emergency stop command; The system sends a predefined switch status code representing "large-area obstruction / equipment shutdown" to the DCS system via its wired communication interface (such as RS485). The shutdown command execution module on the belt control system side monitors its receiving circuit in real time. Once it detects that the relay contact from the alarm host changes from normally open to closed, the module will act immediately, usually cutting off the main power supply to the dewatering belt drive or triggering its safety circuit, forcing the equipment to stop and locking the shutdown state. After receiving the switch status code from the alarm host, the DCS system's communication module transmits it to the human-machine interface module. The human-machine interface module parses the code, confirms the occurrence of a serious intrusion and equipment shutdown event, and then pops up a prominent high-level alarm window on the operation interface (such as a red pop-up displaying "Emergency! Serious intrusion into the dangerous area of ​​the dewatering belt! Equipment has been shut down urgently!"), and simultaneously updates the status icon of the dewatering belt in the process flow diagram, clearly marking it as "shutdown" status. The history recording module records in detail the time, type (serious intrusion / shutdown) of this serious event and all related system response actions.

[0032] Once the person who intruded into the danger zone leaves and no longer blocks the laser fence beam, the fence detection status returns to normal, and the obstruction signal disappears. After confirming the signal disappearance and meeting the preset safety recovery conditions (such as a short delay confirming no continued obstruction), the alarm host will automatically stop outputting control signals (resetting the relay contacts), and the audible and visual alarm devices will stop working. The system automatically returns to normal real-time monitoring status, ready to respond to the next event. It is important to emphasize that the belt control system enters a locked state after triggering a shutdown and will not automatically restart due to the disappearance of the obstruction signal. Restarting the equipment must be done manually by the operator on-site, confirming that the danger has been completely eliminated, using a dedicated reset button or switch at the belt control cabinet or a designated location. Throughout the process, the DCS system receives two types of key signals (alarm signals and switch signals) from the alarm host through its powerful communication module, and provides operators with clear pop-up alarm information and real-time equipment status (running / shutdown) indications on a graphical interface through the human-machine interface module. Its historical record module provides complete data support for event tracing and safety management.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. An electronic fence system for a dewatering conveyor belt, characterized in that, include: Laser fences are deployed along the boundary of the hazardous area of ​​the dewatering conveyor belt. They are designed to emit visible light to form a visual barrier for real-time monitoring of the degree of light obstruction when personnel enter the hazardous area. The alarm host is electrically connected to the laser fence and is used to receive the occlusion signal of the laser fence and process it in a graded manner: the alarm host judges the degree of occlusion based on a preset occlusion area threshold. When the detected occlusion area of ​​a person's body is less than or equal to the threshold, it is identified as a small area occlusion and outputs a first control signal. When the detected occlusion area is greater than the threshold, it is identified as a large area occlusion and outputs a second control signal. The audible and visual alarm device is connected to the alarm host and issues an on-site audible and visual alarm in response to the first or second control signal. The belt control system is connected to the alarm host, receives the second control signal, and immediately controls the dewatering belt conveyor to stop. The DCS system connects to the alarm host, receives the alarm signal corresponding to the first control signal and the switch signal corresponding to the second control signal, and displays alarm information and equipment status to the operator on the computer interface. The alarm host executes a hierarchical response logic: a small area of ​​obstruction triggers the audible and visual alarm device to sound its horn and simultaneously sends an alarm signal to the DCS system; a large area of ​​obstruction triggers the audible and visual alarm device to sound its horn, sends a stop signal to the belt control system, and sends a switching signal to the DCS system based on the same obstruction event.

2. The electronic fence system for a dewatering conveyor belt according to claim 1, characterized in that, The laser fence uses an industrial-grade visible light emitting unit, which is fixed to the guardrail or ground base around the dewatering conveyor by a bracket. The laser beam is laid out horizontally, and its installation position covers the warning area and danger area boundary on both sides and the end of the dewatering conveyor. The unit spacing is set to a predetermined distance according to the size of the danger area, and the installation structure has the ability to resist equipment vibration and collision displacement.

3. The electronic fence system for a dewatering conveyor belt according to claim 1, characterized in that, The alarm control panel is configured with multiple signal input / output interfaces, specifically including: The laser fence signal input interface is used to receive signals from small-area obstruction and signals from large-area obstruction. Wired communication interface for connecting to the DCS system to transmit alarm signals and switch signals; The relay output interface connects to the belt control system to transmit stop commands. The sound and light device drive interface allows for independent control of on-site horns and warning lights; Its signal processing logic is defined as follows: a small area obstruction signal triggers the relay to output an audible and visual start command and an RS485 alarm code; a large area obstruction signal synchronously triggers the relay to output a stop command, an audible and visual start command and an RS485 switch code.

4. The electronic fence system for a dewatering conveyor belt according to claim 1, characterized in that, The audible and visual alarm device includes a high-decibel horn and a high-brightness warning light. Its electrical drive circuit is independently connected to the relay output terminal of the alarm host. When the first control signal or the second control signal is received, the audible and visual alarm is immediately activated until the obstruction signal disappears and the alarm host resets it.

5. The electronic fence system for a dewatering conveyor belt according to claim 1, characterized in that, The belt control system includes a stop command execution module. This module receives the second control signal from the alarm host through a relay control circuit. The signal input interface is preset to a normally open contact connection. Upon receiving the stop command, it immediately cuts off the power supply to the dewatering belt and locks the machine in a stop state until it is manually reset.

6. The electronic fence system for a dewatering conveyor belt according to claim 1, characterized in that, The DCS system includes: The communication module receives alarm signals and switch signals sent by the alarm host through a wired communication interface; The human-machine interaction module is configured to parse alarm signals to generate pop-up warning messages and parse switch signals to update the equipment shutdown status indicator. The history module stores alarm event times, obstruction types, and device response logs.

7. A method for electronic fencing of a dewatering belt conveyor, characterized in that, To implement an electronic fence system for a dewatering conveyor belt as described in any one of claims 1-6, the system includes the following steps: S1: The visible light laser fence deployed at the boundary of the danger zone is used to monitor the occupancy status of personnel in real time. The laser fence emits visible light beams to form a visual barrier. S2: When the laser fence detects a small area of ​​obstruction, it sends a first signal to the alarm host, triggering the alarm host to execute the first response: activate the audible and visual alarm device to sound the siren on site, and at the same time send an alarm signal to the DCS system to generate warning information on the operation interface; S3: When the laser fence detects a large area of ​​obstruction, it sends a second signal to the alarm host, triggering the alarm host to execute a second response: activate the audible and visual alarm device to sound the alarm, simultaneously send a stop command to the belt control system to control the dewatering belt to stop immediately, and send a switch signal to the DCS system to display the equipment stop status on the operation interface. S4: The system automatically resumes monitoring after personnel leave the obstructed area; The belt control system receives shutdown commands and executes equipment shutdown operations through a relay control circuit, while the DCS system receives alarm signals and switch signals through a communication module and configures pop-up alarms and status recording functions on the human-machine interface.

8. The method for electronic fencing of a dewatering conveyor belt according to claim 7, characterized in that, The deployment of the laser fence in step S1 includes: determining the number of laser fence units based on the length of the hazardous area of ​​the dewatering conveyor belt, installing them at predetermined intervals along both sides and end boundaries of the conveyor belt, forming a continuous protective barrier between the beams of the units, and calibrating the height and angle of the laser beams during installation to avoid obstruction by non-human factors.

9. The method for electronic fencing of a dewatering conveyor belt according to claim 7, characterized in that, The execution of the first response in step S2 includes: the alarm host triggers the audible and visual alarm device circuit by closing the relay contacts, and at the same time sends a predefined alarm code to the DCS system through the wired communication interface. After the DCS system parses the code, a "Warning Area Intrusion" prompt box pops up on the operation interface and records the event time.

10. A method for creating an electronic fence for a dewatering conveyor belt according to claim 7, characterized in that, The execution of the second response in step S3 includes: the alarm host synchronously performing three operations: The closing sound and light device drives the relay contacts; Close the stop command relay contact of the belt control system; Send predefined switch status codes to the DCS system via the wired communication interface; The belt control system immediately cuts off the power supply to the dewatering belt conveyor after detecting that the relay contacts are closed.

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