Intelligent tunnel ventilation control system based on stepless speed regulation technology

Abstract

The utility model relates to a tunnel ventilation equipment technical field, concretely is an intelligent tunnel ventilation control system based on stepless speed regulation technology. Include: wind speed sensor for real -time monitoring the wind speed in the tunnel, main control unit for receiving the data of wind speed sensor, calculates the fan speed regulation amount, and generates control instruction, stepless speed regulation drive module is connected with main control unit, realizes the smooth stepless regulation of fan blade rotating speed through the adjustment fan input voltage or frequency, feedback module is used for real -time monitoring the actual rotating speed and operating condition of fan, and the data is fed back to main control unit, forms closed -loop control, communication module, communication module connects feedback module, is used for realizing remote control and data interaction, storage module is used for storing wind speed, rotating speed and control instruction historical data, user interface is used for providing operation interface, and the user sets target wind speed through touch -sensitive screen or remote control equipment.

Description

Technical Field

[0001] This utility model relates to the field of tunnel ventilation equipment technology, specifically an intelligent tunnel ventilation control system based on stepless speed regulation technology. Background Technology

[0002] In enclosed or semi-enclosed spaces such as tunnels and mines, the performance of ventilation systems directly affects environmental safety and personnel health. Traditional tunnel ventilation systems typically use fixed-speed fans or stepped-speed fans, which suffer from problems such as inflexible speed adjustment, low control precision, and high maintenance costs. Fixed-speed fans cannot dynamically adjust the airflow according to the actual needs within the tunnel, resulting in poor ventilation and the potential for localized excessively high or low airflow speeds. The airflow speed within a tunnel dynamically changes with factors such as traffic volume, vehicle speed, and tunnel length. Traditional fans cannot respond to these changes in real time, leading to significant airflow fluctuations and difficulty in maintaining a constant airflow. Stepped-speed fans can cause sudden changes in airflow speed when switching speeds, affecting the stability of the tunnel environment. Traditional fans lack intelligent management functions, and fault diagnosis and maintenance rely on manual labor, resulting in low efficiency.

[0003] To address the aforementioned issues, this invention proposes an intelligent tunnel ventilation control system based on stepless speed regulation technology, which enables precise adjustment of fan speed, maintains constant wind speed within the tunnel, and simultaneously reduces energy consumption and maintenance costs. Summary of the Invention

[0004] To solve the above problems, this utility model provides an intelligent tunnel ventilation control system based on stepless speed regulation technology.

[0005] This utility model adopts the following technical solution: an intelligent tunnel ventilation control system based on stepless speed regulation technology, comprising:

[0006] Wind speed sensor (2) is used to monitor wind speed in the tunnel in real time;

[0007] The main control unit is used to receive data from the wind speed sensor, calculate the wind turbine speed adjustment, and generate control commands.

[0008] The stepless speed regulation drive module is connected to the main control unit and achieves smooth stepless adjustment of the fan blade speed by adjusting the fan input voltage or frequency;

[0009] The feedback module is used to monitor the actual speed and operating status of the fan in real time and feed the data back to the main control unit to form a closed-loop control.

[0010] The communication module connects to the feedback module and is used to enable remote control and data interaction.

[0011] The storage module is used to store historical data of wind speed, rotational speed, and control commands;

[0012] User interface, which provides an operating interface, allows users to set the target wind speed via touch screen or remote control device.

[0013] In some embodiments, wind speed sensors are installed on the top or sidewall of the tunnel to collect wind speed data in real time within the tunnel.

[0014] In some embodiments, the feedback module includes a speed sensor for real-time monitoring of the actual speed of the fan and transmitting the data to the main control unit.

[0015] In some embodiments, the user interface supports remote control functionality, allowing users to remotely set parameters and view operating status via mobile devices or computers.

[0016] In some embodiments, the system also includes a gas sensor and a dust sensor to monitor the concentration of harmful gases and dust in the tunnel and transmit the data to the main control unit, which dynamically adjusts the target wind speed based on the gas and dust concentrations.

[0017] In some embodiments, when the concentration of harmful gases and dust exceeds a set threshold, the main control unit controls the stepless speed regulation drive module to adjust the fan speed to increase.

[0018] In some embodiments, the threshold for harmful gas concentration is 50 ppm, and the threshold for dust concentration is PM10 > 150 μg / m³.

[0019] In some embodiments, the main control unit includes two control modes: manual and automatic. Users can set the target wind speed or select the automatic adjustment mode through the interface.

[0020] In some embodiments, a PID control algorithm is used to calculate the fan speed adjustment. The control formula for the PID control algorithm is as follows:

[0021]

[0022] in, To control the output, This is the error value. , , These are the proportional coefficient, integral coefficient, and derivative coefficient, respectively; the main control unit obtains the actual wind speed through the wind speed sensor and compares it with the target wind speed to obtain the error value. Then, the PID formula is used to calculate the fan speed that needs to be adjusted, and then the stepless speed regulation drive module is controlled to adjust the fan speed so that the actual wind speed approaches the target wind speed, forming a closed-loop control and achieving precise adjustment of wind speed.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] This invention utilizes a PID control algorithm to precisely regulate the fan speed, maintaining a constant airflow within the tunnel. The fan speed is dynamically adjusted according to actual needs, avoiding energy waste and reducing operating costs. Real-time monitoring of airflow changes within the tunnel automatically adjusts the fan speed, improving air quality. Stepless speed regulation reduces mechanical shock and noise, enhancing the comfort of the tunnel environment. Remote control and data monitoring are supported, facilitating operation and maintenance by tunnel management personnel. Attached Figure Description

[0025] Figure 1 This is a block diagram of the control system structure.

[0026] Figure 2 This is a schematic diagram of PID control.

[0027] Figure 3 This is a diagram illustrating the application scenario of a tunnel ventilation system. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0029] like Figure 1 As shown, an intelligent tunnel ventilation control system based on stepless speed regulation technology includes:

[0030] Wind speed sensor 2 is used to monitor wind speed in the tunnel in real time;

[0031] The main control unit 1 is used to receive data from the wind speed sensor 2, calculate the fan speed adjustment amount, and generate control commands;

[0032] The stepless speed regulation drive module 3 is connected to the main control unit 1 and achieves smooth stepless adjustment of the fan blade speed by adjusting the fan input voltage or frequency;

[0033] Feedback module 4 is used to monitor the actual speed and operating status of the fan in real time and feed the data back to the main control unit 1 to form a closed-loop control.

[0034] Communication module 5, which is connected to feedback module 4, is used to realize remote control and data interaction;

[0035] Storage module 6 is used to store historical data of wind speed, rotational speed, and control commands;

[0036] User interface 7 provides an operating interface, allowing users to set the target wind speed via a touchscreen or remote control device.

[0037] Specifically, wind speed sensor 2 is installed on the top or side wall of the tunnel to collect wind speed data in real time.

[0038] The wind speed sensor used is model: Vaisala WMT52 (industrial-grade ultrasonic anemometer).

[0039] Installation method:

[0040] One set is installed every 100 meters along the longitudinal direction of the tunnel, at the center line of the tunnel arch (0.5m from the top). It is connected to the main control unit via shielded twisted-pair cable.

[0041] Main control unit 1 uses a Siemens SIMATIC S7-1500 PLC (6ES7515-2AM02-0AB0).

[0042] Sampling period: 500 ms.

[0043] Feedback module 4 includes a speed sensor, which is used to monitor the actual speed of the fan in real time and transmit the data to the main control unit 1.

[0044] The user interface supports remote control, allowing users to remotely set parameters and view operating status via mobile devices or computers.

[0045] It also includes gas and dust sensors to monitor the concentrations of harmful gases and dust within the tunnel and transmit the data to the main control unit 1. The main control unit 1 dynamically adjusts the target wind speed based on the gas and dust concentrations. When the concentrations of harmful gases and dust exceed set thresholds, the main control unit 1 controls the continuously variable speed drive module 3 to increase the fan speed. The threshold for harmful gas concentration is 50 ppm, and the threshold for dust concentration is PM10 > 150 μg / m³.

[0046] The wind speed sensor connects to the main control unit to monitor the wind speed inside the tunnel in real time and transmits the data to the main control unit. The main control unit receives the wind speed sensor data, uses a PID control algorithm to calculate the fan speed adjustment, and sends control commands to the continuously variable speed drive module. It supports both manual and automatic control modes, and users can set the target wind speed or select automatic adjustment mode through the interface. The continuously variable speed drive module receives commands from the main control unit, adjusts the fan speed, and sends the actual speed data to the feedback module. The feedback module connects to both the main control unit and the continuously variable speed drive module, monitors the actual fan speed and operating status in real time, and feeds the data back to the main control unit, forming a closed-loop control. The user interface connects to the main control unit, supports user input and system status display, and provides an intuitive operating interface. Users can set parameters and view the operating status through a touchscreen or remote control device. The communication module connects to the main control unit and the user interface, supporting remote data transmission and control to achieve remote monitoring and operation of the system. The storage module connects to the main control unit to store system operating data, including wind speed, fan speed, and control commands.

[0047] This invention is applicable to ventilation environments in enclosed or semi-enclosed spaces such as tunnels, mines, and underground parking lots. The communication module supports multiple communication protocols, including RS485, CAN, and Wi-Fi, for remote control and data interaction.

[0048] This invention employs a PID control algorithm to achieve precise adjustment of the fan speed. The control formula is as follows:

[0049]

[0050] in:

[0051] : Control output (fan speed adjustment amount).

[0052] Error value (the difference between the target wind speed and the actual wind speed).

[0053] : Proportional coefficient, used for rapid response to errors.

[0054] : Integral coefficient, used to eliminate steady-state error.

[0055] : Differential coefficients, used to suppress overshoot and oscillation.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. An intelligent tunnel ventilation control system based on stepless speed regulation technology, characterized in that, include: Wind speed sensor (2) is used to monitor wind speed in the tunnel in real time; The main control unit (1) is used to receive data from the wind speed sensor (2), calculate the wind turbine speed adjustment amount, and generate control commands; The stepless speed regulation drive module (3) is connected to the main control unit (1) and achieves smooth stepless adjustment of the fan blade speed by adjusting the fan input voltage or frequency; Feedback module (4) is used to monitor the actual speed and operating status of the fan in real time and feed the data back to the main control unit (1) to form closed-loop control; The communication module (5) is connected to the feedback module (4) to realize remote control and data interaction; Storage module (6) is used to store historical data of wind speed, rotation speed and control commands; User interface (7) is used to provide an operation interface, through which users set the target wind speed via touch screen or remote control device.

2. The intelligent tunnel ventilation control system based on stepless speed regulation technology according to claim 1, characterized in that, The wind speed sensor (2) is installed on the top or side wall of the tunnel to collect wind speed data in the tunnel in real time.

3. The intelligent tunnel ventilation control system based on stepless speed regulation technology according to claim 1, characterized in that, The feedback module (4) includes a speed sensor for real-time monitoring of the actual speed of the fan and transmitting the data to the main control unit (1).

4. The intelligent tunnel ventilation control system based on stepless speed regulation technology according to claim 1, characterized in that, The user interface supports remote control, allowing users to remotely set parameters and view operating status via mobile devices or computers.

5. The intelligent tunnel ventilation control system based on stepless speed regulation technology according to claim 1, characterized in that, It also includes gas sensors and dust sensors to monitor the concentration of harmful gases and dust in the tunnel and transmit the data to the main control unit (1). The main control unit (1) dynamically adjusts the target wind speed according to the gas concentration and dust concentration.

6. The intelligent tunnel ventilation control system based on stepless speed regulation technology according to claim 5, characterized in that, When the concentration of harmful gas and dust exceeds the set threshold, the main control unit (1) controls the stepless speed regulation drive module (3) to adjust the fan speed to increase.

7. The intelligent tunnel ventilation control system based on stepless speed regulation technology according to claim 6, characterized in that, The threshold for harmful gas concentration is 50 ppm, and the threshold for dust concentration is PM10 > 150 μg / m³.

8. The intelligent tunnel ventilation control system based on stepless speed regulation technology according to claim 1, characterized in that, The main control unit (1) includes two control modes: manual and automatic. Users can set the target wind speed or select the automatic adjustment mode through the interface.

9. The intelligent tunnel ventilation control system based on stepless speed regulation technology according to claim 1, characterized in that, The PID control algorithm is used to calculate the fan speed adjustment. The control formula for the PID control algorithm is as follows: in, To control the output, This is the error value. , , These are the proportional coefficient, integral coefficient, and derivative coefficient; the main control unit obtains the actual wind speed through the wind speed sensor and compares it with the target wind speed to obtain the error value. Then, the PID formula is used to calculate the fan speed that needs to be adjusted, and then the stepless speed regulation drive module is controlled to adjust the fan speed so that the actual wind speed approaches the target wind speed, forming a closed-loop control and achieving precise adjustment of wind speed.

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