A method and system for safe grain entry into a grain bin

Abstract

The present application relates to the technical field of grain storage, and particularly relates to a grain storage safety entering method and system, which comprises the following steps: obtaining a current grain storage entering mode, and when a control instruction is received according to the grain storage entering mode, performing an entering operation corresponding to the grain storage entering mode according to the control instruction, so as to ensure that a safety process of "first ventilation, then detection, and finally operation" is performed according to the regulation.

Description

Technical Field

[0001] This invention relates to the field of grain storage technology, specifically to a method and system for ensuring safe entry into grain warehouses. Background Technology

[0002] As a vital facility for national grain reserves, the safety of grain depot operations is of paramount importance. During long-term storage, grain warehouses are prone to accumulating hazardous gases such as low oxygen and carbon dioxide due to processes like grain respiration, fumigation, and controlled atmosphere storage. Direct entry into these warehouses poses significant safety hazards, including poisoning and suffocation.

[0003] Existing grain depot access control systems mostly only have basic identity recognition functions and lack linkage monitoring of the warehouse environment. They cannot ensure that the safety process of "ventilation first, testing second, and operation third" is implemented as required, and there is a risk of personnel entering the warehouse without authorization or entering the warehouse in an environment that does not meet the standards. Summary of the Invention

[0004] To address the technical problem that existing grain depot access control systems cannot ensure that the safety procedure of "ventilation first, inspection second, and operation third" is carried out as required, this application provides a grain depot safety entry linkage method and system.

[0005] The technical solution adopted in this application for a grain warehouse safety entry linkage method and system is as follows: A method for ensuring safe grain storage includes: Obtain the current grain warehouse entry mode, and when a control command is received based on the grain warehouse entry mode, execute the entry operation corresponding to the grain warehouse entry mode according to the control command.

[0006] Furthermore, when the current grain warehouse entry mode is the allowed entry mode, upon receiving a control command based on the grain warehouse entry mode, the steps for executing the entry operation corresponding to the grain warehouse entry mode according to the control command include: When a control command is received requesting personnel to enter the warehouse, the four fan covers, two remote windows, two axial flow fans and lights installed in the grain warehouse are turned on to control the grain warehouse to enter the ventilation mode. The oxygen concentration and carbon dioxide concentration at the current time are obtained by gas detectors installed at the detection points in the grain warehouse. The gas detectors include oxygen sensors and carbon dioxide sensors. If the current oxygen concentration is detected to be greater than or equal to the preset oxygen concentration threshold, and the current carbon dioxide concentration is detected to be less than or equal to the preset carbon dioxide concentration threshold, then the dual-person facial recognition system will be activated to identify the facial data of the person waiting to enter the warehouse. If the facial data matches the preset facial data, the access control system will be activated. If the current oxygen concentration is detected to be less than the preset oxygen concentration threshold, or the current carbon dioxide concentration is detected to be greater than the preset carbon dioxide concentration threshold, then ventilation will continue for 20 minutes in ventilation mode, and the oxygen concentration and carbon dioxide concentration after 20 minutes will be obtained. If the oxygen concentration is detected to be less than the preset oxygen concentration threshold after 20 minutes, or the carbon dioxide concentration is detected to be greater than the preset carbon dioxide concentration threshold after 20 minutes, the four fan covers, two remote windows, two axial fans and lights will be turned off, and a prompt message indicating that entry into the warehouse is not allowed will be output and a voice broadcast will be given. If the oxygen concentration is detected to be equal to or greater than the preset oxygen concentration threshold after 20 minutes, and the carbon dioxide concentration is detected to be equal to or less than the preset carbon dioxide concentration threshold after 20 minutes, then the facial recognition of the person waiting to enter the warehouse will be activated. If the facial data matches the preset facial data, the access control will be activated.

[0007] Furthermore, the steps for executing the warehousing operation corresponding to the grain warehousing mode according to the control instructions also include: When a control command is received requesting personnel to leave the warehouse, it is determined whether the number of people leaving the warehouse is consistent with the number of people entering the warehouse. If the number of people leaving the warehouse is the same as the number of people entering the warehouse, then control the four fan covers, two far-end windows, two axial flow fans and lighting to be turned off.

[0008] Furthermore, when the current grain warehouse entry mode is the prohibited entry mode, upon receiving a control command based on the grain warehouse entry mode, the steps for performing the entry operation corresponding to the grain warehouse entry mode according to the control command include: When the control command for the entry request after the characterization section chief logs in is received, the four fan covers, two remote windows, two axial flow fans and lights installed in the grain warehouse are turned on respectively to control the grain warehouse to enter the ventilation mode. The oxygen concentration and carbon dioxide concentration at the current time are obtained by the gas detectors set at the detection points in the grain warehouse. The gas detectors include oxygen sensors and carbon dioxide sensors. If the current oxygen concentration is detected to be greater than or equal to the preset oxygen concentration threshold, and the current carbon dioxide concentration is detected to be less than or equal to the preset carbon dioxide concentration threshold, then the dual-person facial recognition system will be activated to identify the facial data of the person waiting to enter the warehouse. If the facial data matches the preset facial data, the access control system will be activated. If the current oxygen concentration is detected to be less than the preset oxygen concentration threshold, or the current carbon dioxide concentration is detected to be greater than the preset carbon dioxide concentration threshold, then ventilation will continue for 20 minutes in ventilation mode, and the oxygen concentration and carbon dioxide concentration after 20 minutes will be obtained. If the oxygen concentration is detected to be less than the preset oxygen concentration threshold after 20 minutes, or the carbon dioxide concentration is detected to be greater than the preset carbon dioxide concentration threshold after 20 minutes, the four fan covers, two remote windows, two axial fans and lights will be turned off, and a prompt message indicating that entry into the warehouse is not allowed will be output and a voice broadcast will be given. If the oxygen concentration is detected to be equal to or greater than the preset oxygen concentration threshold after 20 minutes, and the carbon dioxide concentration is equal to or less than the preset carbon dioxide concentration threshold after 20 minutes, then the facial recognition of the person waiting to enter the warehouse is activated. If the facial data is the preset facial data, the access control is activated.

[0009] Furthermore, the steps for executing the warehousing operation corresponding to the grain warehousing mode according to the control instructions also include: When a control command is received requesting personnel to leave the warehouse, it is determined whether the number of people leaving the warehouse is consistent with the number of people entering the warehouse. If the number of people leaving the warehouse is the same as the number of people entering the warehouse, then control the four fan covers, two far-end windows, four axial flow fans and lighting to be turned off.

[0010] Furthermore, when the current grain silo entry mode is winter ventilation mode, upon receiving a control command based on the grain silo entry mode, the steps for performing the entry operation corresponding to the grain silo entry mode according to the control command include: When a control command is received to activate the equipment, the fan cover, axial fan, and lighting installed inside the grain silo are activated to control the grain silo to enter winter ventilation mode.

[0011] Furthermore, the steps for executing the warehousing operation corresponding to the grain warehousing mode according to the control instructions also include: When a control command indicating that the equipment should be shut down is received, the axial flow fan, fan cover, and lighting are turned off.

[0012] This application also provides a grain warehouse safety entry linkage system, which is applied to the above-mentioned grain warehouse safety entry linkage method, including: The control module is used to obtain the current grain warehouse entry mode and, upon receiving a control command based on the grain warehouse entry mode, to execute the entry operation corresponding to the grain warehouse entry mode.

[0013] Beneficial effects achieved: This application provides a method for linking safe grain storage entry, including: obtaining the current grain storage entry mode, and when a control command is received based on the grain storage entry mode, executing the entry operation corresponding to the grain storage entry mode based on the control command.

[0014] In this application, by acquiring the current grain warehouse entry mode and executing the corresponding entry operation according to the mode when receiving control instructions, the system forcibly controls the opening of the fan cover, remote windows, axial flow fans, and lighting to complete the ventilation operation when a control instruction for personnel entry is received in either the allowed or prohibited entry mode. Only then are subsequent processes executed. Through programmed linkage control, the ventilation and subsequent execution steps are sequentially bound to the entry process, eliminating the possibility of skipping steps or reversing the order in human operation, and ensuring that the safe process of "ventilation first, then testing, and then operation" is executed as required. Attached Figure Description

[0015] Figure 1 This is a flowchart illustrating the steps of a grain warehouse safety entry linkage method according to this application; Figure 2 This is a flowchart illustrating the steps when the current grain warehouse entry mode is the allowed entry mode; Figure 3 This is a flowchart illustrating the steps when the current grain warehouse entry mode is the prohibited entry mode. Figure 4 This is a flowchart illustrating the steps for the current grain storage mode in this application, which is the winter ventilation mode. Detailed Implementation

[0016] The following combination Figures 1-4 This application will be described in further detail.

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0018] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0019] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0020] This application discloses a method for linking the safe entry of grain into a warehouse.

[0021] Please refer to Figure 1 The grain storage safety entry linkage method proposed in this embodiment includes step S10: Step S10: Obtain the current grain warehouse entry mode, and when a control command is received based on the grain warehouse entry mode, execute the entry operation corresponding to the grain warehouse entry mode according to the control command.

[0022] This step provides a unified control entry point and decision-making logic framework for the entire grain warehouse entry safety process, which can flexibly adapt to different operating scenarios. Its function is to use a pre-set grain warehouse entry mode as a master control switch, and to incorporate all subsequent specific equipment control, safety detection and personnel verification operations into a procedural execution sequence that strictly corresponds to a specific safety scenario. This eliminates the arbitrariness and uncertainty in manual judgment and operation, and ensures that in any mode, when the grain warehouse safety entry linkage system receives a control command, the subsequent execution chain is predefined and forcibly triggered in sequence. This fundamentally guarantees that the standard operating procedures under different safety levels can be automatically and without omission executed according to regulations, ultimately achieving the fundamental goal of improving the overall safety and management standardization of grain warehouse operations.

[0023] In one feasible implementation, refer to Figure 2 As shown, when the current grain warehouse entry mode is the allowed entry mode, step S10 may specifically include steps S110~S116: Step S110: When a control command is received requesting personnel to enter the warehouse, the four fan covers, two remote windows, two axial flow fans and lighting installed in the grain warehouse are turned on to control the grain warehouse to enter the ventilation mode. The oxygen concentration and carbon dioxide concentration at the current time are obtained by gas detectors installed at the detection points in the grain warehouse. The gas detectors include oxygen sensors and carbon dioxide sensors.

[0024] When the human-machine interface installed in the grain warehouse operation area, such as a touch screen, receives a control command triggered by the operator, representing a request for personnel to enter the warehouse, the PLC (Programmable Logic Controller) will immediately parse the control command and, according to the preset program logic, send high-level signals or specific control messages through its digital output module or via the communication network to the electric actuators connected to the four fan covers, the electric window openers connected to the two remote windows, the contactors of the four axial flow fans, and the relays of the lighting, thereby driving these actuators to operate and realizing ventilation control such as opening the fan covers, opening the remote windows, starting the axial flow fans, and turning on the lighting. It should be noted that the axial flow fans are turned on only after the fan covers and remote windows are opened.

[0025] Meanwhile, the PLC, through its analog input module or communication interface, reads in real time the analog signals or digital data of oxygen and carbon dioxide concentrations measured by the oxygen and carbon dioxide sensors of the gas detectors pre-deployed inside the grain silo, either in a polling or passive receiving manner. This completes the acquisition of the current oxygen and carbon dioxide concentrations, i.e., the environmental gas information, forming an automatically executed mandatory safety procedure of ventilation first, followed by detection. This eliminates the possibility of human intervention or omitting the ventilation step, providing the necessary environmental conditions and data foundation for subsequent safety judgments from the initial stage of the process.

[0026] It should be noted that there are five detection points in this embodiment, namely the northeast corner, southeast corner, center point, northwest corner and southwest corner of the grain warehouse, so as to ensure the comprehensiveness of gas detection.

[0027] Step S111: If the current oxygen concentration is detected to be greater than or equal to a preset oxygen concentration threshold and the current carbon dioxide concentration is detected to be less than or equal to a preset carbon dioxide concentration threshold, then the dual-person facial recognition of the face data of the person waiting to enter the warehouse is activated, and the access control is activated when the face data is the preset face data.

[0028] Step S112: If the oxygen concentration at the current moment is less than the preset oxygen concentration threshold, or the carbon dioxide concentration at the current moment is greater than the preset carbon dioxide concentration threshold, then continue ventilation in ventilation mode for twenty minutes, and obtain the oxygen concentration and carbon dioxide concentration after twenty minutes.

[0029] Step S113: If the oxygen concentration is detected to be less than the preset oxygen concentration threshold after 20 minutes, or the carbon dioxide concentration is detected to be greater than the preset carbon dioxide concentration threshold after 20 minutes, then control the four fan covers, two remote windows, four axial flow fans and lighting to be turned off, and output a prompt message and voice broadcast indicating that entry into the chamber is not allowed.

[0030] After ventilation and simultaneous activation of the gas detector for continuous monitoring, the current carbon dioxide and oxygen concentrations are monitored first to determine whether personnel can immediately enter the warehouse for work. When all current oxygen concentrations are detected to be greater than or equal to a preset oxygen concentration threshold, and all current carbon dioxide concentrations are detected to be less than or equal to a preset carbon dioxide concentration threshold, the facial recognition of the personnel waiting to enter the warehouse is activated. When the facial data matches the preset facial data, the access control is opened.

[0031] When the PLC detects that the lowest oxygen concentration at any given moment is less than a preset oxygen concentration threshold, or the highest carbon dioxide concentration at any given moment is greater than a preset carbon dioxide concentration threshold, the PLC will start an internal timer. When the timer reaches twenty minutes, the PLC will obtain the oxygen and carbon dioxide concentrations at that moment (i.e., the oxygen and carbon dioxide concentrations twenty minutes later) from the oxygen and carbon dioxide sensors respectively, and compare them with the preset oxygen and carbon dioxide concentration thresholds respectively. If the logical judgment result is that the lowest oxygen concentration is less than the preset oxygen concentration threshold, or the lowest carbon dioxide concentration is greater than the preset carbon dioxide concentration threshold, the PLC will immediately send a closing command or a low-level signal through its output module or communication interface to the electric actuators of the four fan covers, the electric window openers connected to the two remote windows, the contactors of the four axial fans, and the relays of the lighting, thereby synchronously closing the four fan covers, closing the two remote windows, stopping the operation of the four axial fans, and turning off the lighting, completing a safety reset.

[0032] At the same time, the PLC will generate a clear alarm message (i.e., prompt message and voice broadcast), and display red warning text and icon on the connected touch screen, trigger the on-site sound and light alarm to sound and flash, and upload the "No Entry" prompt message to the remote monitoring center. Its main function is to interrupt the entry process, lock the access control, and issue clear prohibition warnings through multiple means when it is detected that the ambient gas in the grain warehouse still does not meet the safety standards after forced ventilation. This physically prevents personnel from entering the dangerous environment and reminds the warehouse keeper to intervene.

[0033] Step S114: If the oxygen concentration after 20 minutes is equal to or greater than the preset oxygen concentration threshold, and the carbon dioxide concentration after 20 minutes is equal to or less than the preset carbon dioxide concentration threshold, then activate the dual-person facial recognition to identify the facial data of the person waiting to enter the warehouse. When the facial data is the preset facial data, open the access control.

[0034] When all oxygen concentrations are detected to be equal to or greater than a preset oxygen concentration threshold, and all carbon dioxide concentrations are equal to or less than a preset carbon dioxide concentration threshold, the PLC will generate an instruction to allow entry into the subsequent identity verification process. This instruction is sent through the PLC's communication interface to the dual-person facial recognition device deployed at the entrance, triggering it to enter working mode. The built-in camera of the dual-person facial recognition device is then activated and begins to collect facial images of the personnel waiting to enter the warehouse.

[0035] The system performs face detection and localization on the collected facial images, then extracts key feature points from the detected facial regions. The extracted feature vectors are then compared one-to-one or one-to-many with the facial feature templates of authorized personnel (i.e., custodians or section chiefs) pre-stored in the system database. When the collected facial data successfully matches the pre-set facial feature templates of authorized personnel, the facial data is determined to be the pre-set facial data. Subsequently, the PLC sends an unlock command or high-level pulse signal to the access control system's electric lock or access controller to drive the access control to open, allowing personnel to enter. This establishes a dual interlocking access mechanism for environmental safety and identity compliance, ensuring that the access channel is only physically opened when the gas environment inside the grain warehouse is confirmed to be safe and the identities of the personnel entering are verified as authorized. This eliminates the risk of allowing entry based on any single condition.

[0036] Step S115: When a control command is received indicating that a person is leaving the warehouse, it is determined whether the number of people leaving the warehouse is consistent with the number of people entering the warehouse.

[0037] When the human-machine interface or sensors installed in the grain warehouse exit area, such as the exit button or infrared sensor, receive a control command that clearly indicates a request for personnel to exit the warehouse, the PLC will initiate a personnel verification process: First, it will read and retrieve from non-volatile memory the number of personnel who were successfully verified and recorded by dual-person facial recognition in step S112 during the current entry cycle as a baseline value; simultaneously, it will use counting devices deployed on the exit channel, such as cameras, to collect real-time video streams from the exit, and employ deep learning models such as YOLO or SSD to detect and frame human bodies in the video frames, and then use the baseline... Algorithms based on appearance features or motion trajectories associate and track the same human target detected in consecutive frames, ensuring that the same person is counted only once when crossing the counting area. This allows for real-time and accurate cumulative counting of personnel leaving the grain warehouse, resulting in a real-time cumulative value of the number of people leaving the warehouse. The PLC compares this real-time cumulative value with a baseline value. If the two values ​​are equal, it is determined that "the number of people leaving the warehouse is consistent with the number of people entering the warehouse." This achieves closed-loop counting management of grain warehouse workers, effectively preventing safety accidents caused by personnel omission, entrapment, or counting errors, and ensuring that no one remains in the warehouse after the operation is completed.

[0038] Step S116: If the number of people leaving the warehouse is the same as the number of people entering the warehouse, then control the four fan covers, two far-end windows, two axial flow fans and lighting to be turned off.

[0039] After the PLC completes the consistency judgment of the number of people and obtains the logic that "the number of people leaving the warehouse is consistent with the number of people entering the warehouse", this judgment result will serve as a trigger signal to trigger the PLC to execute the shutdown procedure. Through its digital output interface or via the industrial bus network, it sends a shutdown drive signal to the electric actuator controlling the fan cover, a shutdown drive signal to the electric window opener controlling the remote window, a power-off signal to the contactor coil controlling the axial flow fan, and a disconnect signal to the relay controlling the lighting. This sequentially or synchronously drives the four fan covers to close, the two remote windows to close, the four axial flow fans to stop running, and the lighting to turn off, completing the centralized shutdown operation of all equipment opened in the warehouse entry process. This achieves intelligent linkage between personnel safety and equipment management. That is, after the system confirms that all authorized personnel have safely left the warehouse, it automatically restores the grain warehouse environment to the initial or standby state. This not only eliminates energy waste or equipment damage caused by personnel forgetting to shut down the equipment, but also prepares for the start of the next safe warehouse entry operation, forming a complete and closed-loop automated management cycle.

[0040] In one feasible implementation, refer to Figure 2 As shown, when the current grain warehouse entry mode is the prohibited entry mode, step S20 may specifically include steps S210~S216: Step S210: When the control command for the section chief's request to enter the grain warehouse is received, the four fan covers, two remote windows, two axial flow fans and lights installed in the grain warehouse are turned on to control the grain warehouse to enter the ventilation mode. The oxygen concentration and carbon dioxide concentration at the current time are obtained by the gas detectors installed at the detection points in the grain warehouse. The gas detectors include oxygen sensors and carbon dioxide sensors.

[0041] Step S211: If the current oxygen concentration is detected to be greater than or equal to a preset oxygen concentration threshold and the current carbon dioxide concentration is detected to be less than or equal to a preset carbon dioxide concentration threshold, then the dual-person facial recognition of the face data of the person to be admitted to the warehouse is activated, and the access control is activated when the face data is the preset face data.

[0042] Step S212: If the oxygen concentration at the current moment is less than the preset oxygen concentration threshold, or the carbon dioxide concentration at the current moment is greater than the preset carbon dioxide concentration threshold, then continue ventilation in ventilation mode for twenty minutes, and obtain the oxygen concentration and carbon dioxide concentration after twenty minutes.

[0043] Step S213: If the oxygen concentration is detected to be less than the preset oxygen concentration threshold after 20 minutes, or the carbon dioxide concentration is detected to be greater than the preset carbon dioxide concentration threshold after 20 minutes, then control the four fan covers, two remote windows, two axial flow fans and lighting to be turned off, and output a prompt message and voice broadcast indicating that entry into the chamber is not allowed.

[0044] Step S214: If the oxygen concentration after 20 minutes is equal to or greater than the preset oxygen concentration threshold, and the carbon dioxide concentration after 20 minutes is equal to or less than the preset carbon dioxide concentration threshold, then activate the dual-person facial recognition to identify the facial data of the person waiting to enter the warehouse. When the facial data is the preset facial data, open the access control.

[0045] Step S215: When a control command is received indicating that a person is leaving the warehouse, determine whether the number of people leaving the warehouse is consistent with the number of people entering the warehouse.

[0046] Step S216: If the number of people leaving the warehouse is the same as the number of people entering the warehouse, then control the four fan covers, two far-end windows, four axial flow fans and lighting to be turned off.

[0047] The specific execution process of steps S210 to S216 is the same as that of steps S110 to S116, so it will not be repeated here. It should be noted that the "section chief personnel entering the warehouse" mentioned in this embodiment refers to the higher-level personnel set in the system, namely the section chief. When the current grain warehouse entry mode is the prohibited entry mode, personnel are not allowed to enter the warehouse under normal circumstances. However, if there is authorization from the section chief, that is, only by logging into the section chief's account and password on the grain warehouse safety entry linkage system can the emergency entry button and exit button be clicked on the touch screen, and the operation process of steps S210 to S216 can be executed.

[0048] In one feasible implementation, refer to Figure 3 As shown, when the current grain storage mode is winter ventilation mode, step S30 may specifically include steps S310~S311: Step S310: When a control command is received to indicate the opening of the equipment, the fan cover, axial fan and lighting installed in the grain silo are turned on respectively to control the grain silo to enter the winter ventilation mode.

[0049] When an operator selects the winter ventilation mode on the touchscreen and triggers the switch to start the equipment, this operation generates a control command indicating that the equipment is to be started. This control command is transmitted to the PLC via fieldbus or network. After receiving the control command, the PLC's internal control program is triggered, parses the content of the control command, and confirms that its target is to start the specified three types of equipment. Then, through its integrated digital output module or via an independent communication protocol driver module, it sends high-level signals or specific control messages to the electric actuators of the fan covers, the contactors of the axial flow fans, and the relays of the lighting lamps, respectively. This drives the four fan covers to physically open to the preset opening degree, the four axial flow fans to start running, and the lighting lamp circuit to be turned on, completing a reliable execution chain from control command to equipment action. This achieves one-button, programmed equipment linkage start-up, providing basic ventilation and lighting conditions for the grain silo, while ensuring the standardization and reliability of equipment operation, avoiding the tediousness and possible omissions of manual operation.

[0050] Step S311: When a control command indicating that the equipment is to be shut down is received, the axial flow fan, the fan cover and the lighting are turned off.

[0051] When the PLC receives a control command characterized as "shut down the equipment", the PLC will immediately parse and execute the shutdown procedure. Through its digital output interface or via the industrial bus network, it sends a shutdown drive signal to the electric actuator controlling the fan cover, a power-off signal to the contactor coil controlling the axial flow fan, and a disconnect signal to the relay controlling the lighting, thereby sequentially or synchronously driving the four fan covers to close, the four axial flow fans to stop running, and the lighting to turn off.

[0052] This application also provides a grain warehouse safety entry linkage system, which is applied to the above-mentioned grain warehouse safety entry linkage method. The grain warehouse safety entry linkage system includes: The control module is used to obtain the current grain warehouse entry mode and, upon receiving a control command based on the grain warehouse entry mode, to execute the entry operation corresponding to the grain warehouse entry mode.

[0053] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A method for linking safe grain storage in a grain warehouse, characterized in that, include: The system obtains the current grain warehouse entry mode and, upon receiving a control command based on the grain warehouse entry mode, executes the entry operation corresponding to the grain warehouse entry mode according to the control command.

2. The grain storage safety entry linkage method according to claim 1, characterized in that, When the current grain warehouse entry mode is the allowed entry mode, the step of executing the entry operation corresponding to the grain warehouse entry mode according to the control command received based on the grain warehouse entry mode includes: When the control command for personnel to enter the warehouse is received, the four fan covers, two remote windows, two axial flow fans and lighting installed in the grain warehouse are turned on respectively to control the grain warehouse to enter the ventilation mode. The oxygen concentration and carbon dioxide concentration at the current time are obtained by the gas detectors installed at the detection points in the grain warehouse. The gas detectors include oxygen sensors and carbon dioxide sensors. If the oxygen concentration at the current moment is detected to be greater than or equal to a preset oxygen concentration threshold, and the carbon dioxide concentration at the current moment is less than or equal to a preset carbon dioxide concentration threshold, then dual-person facial recognition is activated to identify the facial data of the person waiting to enter the warehouse. If the facial data matches the preset facial data, then the access control is activated. If the oxygen concentration at the current moment is detected to be less than the preset oxygen concentration threshold, or the carbon dioxide concentration at the current moment is detected to be greater than the preset carbon dioxide concentration threshold, then ventilation will continue for twenty minutes in the ventilation mode, and the oxygen concentration and carbon dioxide concentration after twenty minutes will be obtained. If the oxygen concentration is detected to be less than the preset oxygen concentration threshold after 20 minutes, or the carbon dioxide concentration is detected to be greater than the preset carbon dioxide concentration threshold after 20 minutes, the four fan covers, the two remote windows, the two axial flow fans and the lighting are controlled to be turned off, and a prompt message indicating that entry into the warehouse is not allowed and a voice broadcast are output. If the oxygen concentration after 20 minutes is detected to be equal to or greater than the preset oxygen concentration threshold, and the carbon dioxide concentration after 20 minutes is equal to or less than the preset carbon dioxide concentration threshold, then dual-person facial recognition is activated to identify the facial data of the person waiting to enter the warehouse. If the facial data matches the preset facial data, then the access control is activated.

3. The grain warehouse safety entry linkage method according to claim 2, characterized in that, The step of performing the warehousing operation corresponding to the grain warehouse warehousing mode according to the control command further includes: When the control command for personnel to leave the warehouse is received, it is determined whether the number of people leaving the warehouse is consistent with the number of people entering the warehouse; If the number of people leaving the warehouse is the same as the number of people entering the warehouse, then the four fan covers, the two far-end windows, the two axial flow fans, and the lighting are turned off.

4. The grain warehouse safety entry linkage method according to claim 1, characterized in that, When the current grain warehouse entry mode is a prohibited entry mode, the step of executing the entry operation corresponding to the grain warehouse entry mode according to the control command received based on the grain warehouse entry mode includes: When the control command is received to request the grain warehouse to be entered after the section chief logs in, the four fan covers, two remote windows, two axial flow fans and lights installed in the grain warehouse are turned on respectively to control the grain warehouse to enter the ventilation mode. The oxygen concentration and carbon dioxide concentration at the current time are obtained by the gas detectors installed at the detection points in the grain warehouse. The gas detectors include oxygen sensors and carbon dioxide sensors. If the oxygen concentration at the current moment is detected to be greater than or equal to a preset oxygen concentration threshold, and the carbon dioxide concentration at the current moment is less than or equal to a preset carbon dioxide concentration threshold, then dual-person facial recognition is activated to identify the facial data of the person waiting to enter the warehouse. If the facial data matches the preset facial data, then the access control is activated. If the oxygen concentration at the current moment is detected to be less than the preset oxygen concentration threshold, or the carbon dioxide concentration at the current moment is detected to be greater than the preset carbon dioxide concentration threshold, then ventilation will continue for twenty minutes in the ventilation mode, and the oxygen concentration and carbon dioxide concentration after twenty minutes will be obtained. If the oxygen concentration is detected to be less than the preset oxygen concentration threshold after 20 minutes, or the carbon dioxide concentration is detected to be greater than the preset carbon dioxide concentration threshold after 20 minutes, the four fan covers, the two remote windows, the two axial flow fans and the lighting are controlled to be turned off, and a prompt message indicating that entry into the warehouse is not allowed and a voice broadcast are output. If the oxygen concentration after 20 minutes is detected to be equal to or greater than the preset oxygen concentration threshold, and the carbon dioxide concentration after 20 minutes is equal to or less than the preset carbon dioxide concentration threshold, then dual-person facial recognition is activated to identify the facial data of the person waiting to enter the warehouse. If the facial data matches the preset facial data, then the access control is activated.

5. The grain storage safety entry linkage method according to claim 4, characterized in that, The step of performing the warehousing operation corresponding to the grain warehouse warehousing mode according to the control command further includes: When the control command for personnel to leave the warehouse is received, it is determined whether the number of people leaving the warehouse is consistent with the number of people entering the warehouse; If the number of people leaving the warehouse is the same as the number of people entering the warehouse, then the four fan covers, the two far-end windows, the four axial flow fans, and the lighting are turned off.

6. The grain warehouse safety entry linkage method according to claim 1, characterized in that, When the current grain warehouse entry mode is winter ventilation mode, the step of executing the entry operation corresponding to the grain warehouse entry mode according to the control command received based on the grain warehouse entry mode includes: When the control command indicating the activation of the equipment is received, the fan cover, axial flow fan and lighting installed in the grain silo are activated respectively to control the grain silo to enter the winter ventilation mode.

7. The grain warehouse safety entry linkage method according to claim 6, characterized in that, The step of performing the warehousing operation corresponding to the grain warehouse warehousing mode according to the control command further includes: When the control command indicating that the equipment is to be shut down is received, the axial flow fan, the fan cover, and the lighting are controlled to be turned off.

8. A grain warehouse safety entry linkage system, characterized in that, The grain warehouse safety entry linkage system is applied to the grain warehouse safety entry linkage method as described in any one of claims 1 to 7, including: The control module is used to obtain the current grain warehouse entry mode, and when it receives a control command based on the grain warehouse entry mode, it executes the entry operation corresponding to the grain warehouse entry mode according to the control command.

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