Automatic damper control method and system based on dual infrared sensor

Abstract

The present application relates to a kind of automatic air door control method and system based on double infrared sensor, belong to underground air door intelligent control technical field.The control system includes signal detection module, linkage control module, signal output module and signal processor, linkage control module is connected with signal processing module and signal output module respectively, signal detection module is connected with signal processing module.The control system judges whether there is personnel or vehicle through air door by infrared opposite transmission sensor, perceives the temperature change near air door by infrared temperature sensor, and the opening and closing of air door are controlled in combination with sensor detection signal.The present application can avoid the occurrence of the accident of being stuck, improves the safety and reliability of automatic air door operation.

Description

Technical Field

[0001] This invention belongs to the field of intelligent control technology for downhole air doors, and relates to an automatic air door control method and system based on dual-type infrared sensors. Background Technology

[0002] Mine ventilation is a crucial aspect of coal mine production and is closely related to mine safety. Its main function is to deliver sufficient fresh air underground while simultaneously expelling diluted air containing harmful gases and mine dust from the surface. This ensures good underground air quality, supplies the oxygen needed for underground workers' breathing, limits mine dust concentration within safe limits, and maintains acceptable humidity, temperature, and wind speed. Mine ventilation systems are primarily used to control airflow underground, ensuring it flows in a directional and quantitative manner along a predetermined path. Based on their purpose, mine ventilation systems can be categorized into those that guide airflow, those that isolate airflow, and those that regulate airflow.

[0003] Airlock doors, as common air-blocking facilities in mine ventilation systems, are typically installed in roadways that isolate airflow while allowing vehicles and personnel to pass through. Traditional automatic airlock doors rely on counterweights or their own tilt angle to achieve automatic closing, but suffer from low automation, short lifespan, lack of monitoring capabilities, and safety hazards. Current automatic airlock door technology primarily uses PLCs or microcontrollers as the control core, employing electric, hydraulic, or pneumatic actuation for opening and closing, and photosensitive sensors or infrared beam sensors as detection devices to detect personnel or vehicles. Automatic control of the airlock is achieved through the combination of these components. However, in methods that detect personnel or vehicle movement, relying on a single photosensitive sensor or infrared beam sensor is prone to false triggering. For example, when water droplets pass through light or infrared beams in a coal mine roadway, the sensor may send incorrect signals, causing the airlock to open incorrectly when no personnel or vehicles are needed, potentially leading to airflow turbulence and accidents. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide an automatic damper control method and system based on dual infrared sensors. By combining an infrared beam sensor and an infrared temperature sensor to sense information near the damper, the damper is prevented from opening incorrectly, and accidents such as people or vehicles being trapped are avoided, thereby improving the safety and reliability of the automatic damper operation.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] Option 1: An automatic damper control method based on infrared dual-type sensors. This method uses an infrared beam sensor and an infrared temperature sensor to detect whether personnel or vehicles are passing through the damper, and also detects temperature changes near the damper. When the infrared beam sensor detects personnel or vehicles passing through the damper, the damper opens; otherwise, it closes. When the temperature detected by the infrared temperature sensor is higher than a set threshold, the damper closes after a delay, ensuring the safe passage of personnel or vehicles.

[0007] Furthermore, the opening and closing rules for the automatic damper are as follows:

[0008] 1) The infrared beam sensor is triggered, the infrared temperature sensor does not alarm, and the damper closes;

[0009] 2) The infrared beam sensor is triggered, the infrared temperature sensor alarms, and the damper opens;

[0010] 3) If the infrared temperature sensor alarms but the infrared beam sensor is not triggered, the damper delay closing procedure will be started until the infrared temperature sensor alarm signal is cleared and the damper closes.

[0011] Furthermore, there are two dampers, and when one damper is open, the other damper must be closed.

[0012] Option 2: An automatic damper control system based on dual-type infrared sensors. This control system includes a signal detection module, a linkage control module, a signal output module, and a signal processor. The linkage control module is connected to both the signal output module and the signal processor; the signal detection module is connected to the signal processor.

[0013] The signal detection module includes an infrared beam sensor and an infrared temperature sensor. Both the infrared beam sensor and the infrared temperature sensor are connected to the signal processor.

[0014] The signal output module includes a speaker and a signal light, both of which are connected to the linkage control module.

[0015] Optionally, the infrared photoelectric sensors are installed facing each other on the walls on both sides of the damper, and the axes of the infrared light source transmitter and the infrared light source receiver coincide.

[0016] Optionally, the horizontal distance between the installation position of the infrared beam sensor and the damper is greater than the maximum turning radius of the damper, while the vertical installation height of the infrared beam sensor is in the range of 1 to 1.5m.

[0017] Optionally, the infrared temperature sensor is installed directly above the damper.

[0018] The beneficial effects of this invention are as follows: This invention uses an infrared sensor to sense the infrared light source and infrared temperature near the damper, avoiding false triggering caused by a single detection method, improving the spatial perception capability of the automatic damper. At the same time, it combines the detection information of the infrared beam sensor and the infrared temperature sensor to set the opening and closing rules of the damper, realizing the automatic control of the damper, avoiding accidents of people or vehicles being trapped, and improving the safety and reliability of the automatic damper operation.

[0019] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0020] To make the objectives, technical solutions, and advantages of the present invention clearer, the preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, wherein:

[0021] Figure 1 This is a block diagram of the automatic damper control system.

[0022] Figure 2 This is a schematic diagram of the automatic damper structure.

[0023] Reference numerals: 1-Infrared light source transmitter; 2-Infrared light source receiver; 3-Infrared temperature sensor. Detailed Implementation

[0024] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0025] like Figure 1 As shown, this is an automatic damper control system based on dual-type infrared sensors. The control system includes a signal detection module, a linkage control module, a signal output module, and a signal processor.

[0026] The signal detection module includes an infrared beam sensor and an infrared temperature sensor. The infrared beam sensor detects changes in the infrared light source near the damper, while the infrared temperature sensor detects changes in the infrared temperature near the damper, and transmits the detection signals to the signal processing unit.

[0027] The signal processor is used for the classification, storage and preprocessing of sensor signals. The signal preprocessing includes signal noise filtering, signal calibration and temperature compensation. The processed detection signal is directly transmitted to the linkage control module.

[0028] The linkage control module mainly sends control commands to the automatic damper by performing logical correlation analysis and judgment on the data from the infrared beam sensor and the infrared temperature sensor. The damper control rules include damper opening, damper closing, and damper delayed closing.

[0029] The signal output module includes a speaker and signal lights, both of which are connected to the linkage control module. The signal lights and speaker work together. When the linkage control module detects that personnel or vehicles are passing through the damper, it activates the speaker and signal lights, providing a voice reminder to the personnel or vehicles to proceed with caution, while the signal lights display green. When no personnel or vehicles are passing through the damper, the voice alarm is silenced, and the signal lights display red.

[0030] The installation locations of the infrared beam sensor and the infrared temperature sensor are as follows: Figure 2 As shown, the infrared beam sensor consists of an infrared light source transmitter and an infrared light source receiver. The transmitter and receiver are installed facing each other on the walls on both sides of the damper, with their axes coinciding. Furthermore, considering the safety of personnel or vehicles passing through, the horizontal distance between the infrared beam sensor and the damper should be greater than the maximum turning radius of a single damper. The vertical installation height of the infrared beam sensor is 1–1.5 m. The infrared temperature sensor is installed directly above each door.

[0031] The linkage control module automatically controls the damper through the set logic rules, which include damper opening, damper closing, and damper delayed closing.

[0032] The signal output module includes a speaker and signal lights, both of which are connected to the linkage control module. The signal lights and speaker work together. When the linkage control module detects that personnel or vehicles are passing through the vent, it activates the speaker and signal lights, providing a voice reminder to the personnel or vehicles to proceed with caution, while the signal lights display green. When no personnel or vehicles are passing through the vent, the speaker does not activate, and the signal lights display red.

[0033] Based on the above control system, the control method of the automatic damper is as follows: information near the damper is sensed by dual-type infrared sensors, which include an infrared beam sensor and an infrared temperature sensor: the infrared beam of the infrared beam sensor determines whether there are personnel or vehicles passing through the damper. When the infrared beam is blocked, the infrared beam sensor is triggered and the damper opens; otherwise, the damper closes. The infrared temperature sensor senses temperature changes near the damper. When the temperature detected by the infrared temperature sensor is higher than the set threshold, the infrared temperature sensor alarms, and the damper closes after a delay to ensure the safe passage of personnel or vehicles.

[0034] The specific rules for the automatic opening and closing of the damper are as follows:

[0035] When the infrared light source transmitter 1 is blocked, the infrared light source receiver 2 will be triggered to alarm. If the infrared temperature sensor 3 does not alarm, the damper will be closed.

[0036] When the infrared light source transmitter 1 is blocked, the infrared light source receiver 2 is triggered to alarm. If the infrared temperature sensor 3 also alarms at the same time, the damper will open.

[0037] When the infrared temperature sensor 3 alarms but the infrared beam sensor is not triggered, the damper delay closing program starts and continues until the alarm signal of the infrared temperature sensor 3 is cleared, at which point the damper closes.

[0038] To prevent airflow short circuits caused by the opening of the damper when people and vehicles pass through, the automatic damper is equipped with two dampers. When one damper is open, the other damper must be closed. Specifically, the opening time of the two dampers is used as the criterion, and one damper is opened first until the infrared temperature sensor alarm signal of that damper disappears, and then the other damper restarts the opening procedure.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. An automatic damper control method based on an infrared dual-mode sensor, characterized in that: The system uses an infrared beam sensor and an infrared temperature sensor to detect whether people or vehicles are passing through the air vent, as well as to detect temperature changes near the air vent. When the infrared beam sensor detects that people or vehicles are passing through the air vent, the air vent opens; otherwise, the air vent closes. When the temperature detected by the infrared temperature sensor is higher than a set threshold, the air vent closes after a delay to ensure the safe passage of people or vehicles. The specific rules for opening and closing automatic dampers are as follows: 1) When the infrared beam sensor is triggered, the infrared temperature sensor does not alarm, and the damper closes to prevent the infrared beam sensor from accidentally triggering the damper and causing airflow turbulence. 2) The infrared beam sensor is triggered, the infrared temperature sensor alarms, and the damper opens; 3) If the infrared temperature sensor alarms but the infrared beam sensor is not triggered, the damper delay closing program will be started until the infrared temperature sensor alarm signal is cleared, at which point the damper will close. The horizontal distance between the installation position of the infrared beam sensor and the damper is greater than the maximum turning radius of the damper, and the vertical installation height of the infrared beam sensor is in the range of 1~1.5m.

2. The automatic damper control method according to claim 1, characterized in that: The damper is provided in two stages; when one damper is open, the other damper must be closed.

3. An automatic damper control system based on dual-type infrared sensors, used to implement the automatic damper control method according to any one of claims 1 to 2, characterized in that: The control system includes a signal detection module, a linkage control module, a signal output module, and a signal processor; the linkage control module is connected to both the signal output module and the signal processor; the signal detection module is connected to the signal processor. The signal detection module includes an infrared beam sensor and an infrared temperature sensor; the infrared beam sensor and the infrared temperature sensor are respectively connected to the signal processor; the signal output module includes a speaker and a signal light, both of which are connected to the linkage control module.

4. The automatic damper control system according to claim 3, characterized in that: The infrared photoelectric sensors are installed facing each other on the walls on both sides of the damper, and the axes of the infrared light source transmitter and the infrared light source receiver coincide.

5. The automatic damper control system according to claim 4, characterized in that: The horizontal distance between the installation position of the infrared beam sensor and the damper is greater than the maximum turning radius of the damper, and the vertical installation height of the infrared beam sensor is in the range of 1~1.5m.

6. The automatic damper control system according to claim 3, characterized in that: The infrared temperature sensor is installed directly above the damper.

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