Limited space operation safety management system and method

Abstract

The invention provides a limited space operation safety management system and method, and the system comprises an operation examination and approval management module, a field monitoring device, an operator management module, a tool management module, and an abnormity alarm module, and achieves the whole-process and all-around safety management of limited space operation. A complete safety management system is formed from examination and approval management before operation, real-time monitoring and abnormal alarm reminding in operation and archiving management after operation is finished. Through the deployment of field monitoring equipment, the real-time monitoring and abnormal alarm reminding of a working field are realized, and the timeliness and accuracy of safety management are improved; through the arrangement of the operator management and tool management module, the personnel behavior and the tool use are effectively standardized, and the safety risk is reduced; and due to multiple alarm modes of the abnormity alarm module, related personnel can be informed of abnormal conditions in time, and the emergency response speed is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of safe operation management, and in particular to a confined space operation safety management system and method. Background Art

[0002] As a production equipment-intensive enterprise, power generation enterprises have complex production sites and safety management is crucial. Among them, the management of confined space operations is the focus and difficulty of risk control. With the rapid development of the power generation industry in recent years, the relevant operation teams have not been developed in a coordinated manner, and are far from being able to meet the needs of the market after the explosive growth of installed capacity. As a result, the overall quality level of the current operation team is relatively low, and the safety awareness is weak, which brings new challenges to the safety management of confined spaces. The traditional management method relies on personnel to supervise and record in accordance with rules and regulations. Affected by factors such as the quality and experience of the guardian, this method has great randomness and uncertainty, and there are many dangerous factors such as toxic and harmful gases, failure to implement the approval system, random entry and exit of personnel, untimely rescue, fire, habitual violations, and left-over tools. Summary of the invention

[0003] In order to solve the problems existing in the prior art, the present invention provides a confined space operation safety management system and method, which can realize full-process and all-round safety management of confined space operations and reduce the probability of safety accidents.

[0004] The present invention proposes a confined space operation safety management system, comprising: The job approval management module is used to initiate the job approval process online, connect to the enterprise work ticket information interface, and implement pre-job approval management. After the job is completed, it reminds you if there are any errors left, and automatically archives the system's electronic documents.

[0005] On-site monitoring equipment is deployed at the confined space operation site to monitor the operation process in real time, including personnel entry and exit detection equipment, gas detectors, smart bracelets, cameras, etc., to achieve real-time monitoring and abnormal alarm reminders during operations.

[0006] The operator management module is used to perform facial recognition on operators and bind wristbands to achieve authorized entry, record entry and exit records, locate the position and trajectory of operators in real time, monitor personnel vital signs, and alert abnormal signs, abnormal behavior, and actively call for help SOS.

[0007] The operator management module adopts GPS+micro-inertial navigation fusion positioning technology and uses Lora for signal communication. The sensor signal is transmitted to the operator management module for analysis, and full scene coverage is achieved through a dynamic switching mechanism: the micro-inertial navigation trajectory error is corrected using GPS signals in open areas, and switched to pure micro-inertial navigation mode in a closed environment. At the same time, based on the accelerometer and gyroscope, the operator's movement posture is analyzed in real time, and the threshold rule and posture analysis algorithm are used to comprehensively identify the method to accurately identify abnormal alarms, such as lying down (attitude angle pitch> 65°) and the posture analysis algorithm identifies the lying posture as more than 30 seconds and automatically calls for help, which significantly improves the safety of limited space operations and the efficiency of emergency response.

[0008] The operator motion posture analysis algorithm adopts the spatiotemporal attention convolutional network posture analysis algorithm, which includes the following core modules: The spatiotemporal feature extraction layer uses 3D convolution kernels to extract the spatiotemporal features of sensor data:

[0009] Adaptive attention layer, through channel attention (CA) and spatial attention (SA) mechanisms, dynamically weights key features:

[0010]

[0011] Among them, GAP is the global average pooling, GMP is the global maximum pooling, is the Sigmoid function; represents the spatiotemporal matrix of sensor data, represents the convolutional layer weights, represents the output of the channel attention layer, represents the output of the spatial attention layer, represents the convolutional layer bias, represents a multi-layer perceptron, Represents the splicing layer, represents a two-dimensional convolutional layer, represents a 3D convolutional layer, Element-wise multiplication method; The classification output layer outputs 13 posture categories, including standing, walking, running, lying, going up and down stairs, sitting, bending, turning, climbing, curling up, crawling, equipment operation, and falling:

[0012] in, Output category, Posture category, The k-th posture classification output layer weight, Indicates The output layer bias of posture classification, Indicates The weights of the output layer for posture classification, Indicates The output layer bias for pose classification.

[0013] The threshold rule and posture analysis algorithm comprehensive judgment method, that is, the comprehensive threshold rule judgment result and posture analysis algorithm judgment result, identifies and warns the four potential dangerous behaviors of lying down, falling, curling up, and crawling. The specific judgment rules are as follows: Lying down risky behavior: pitch angle >65° and standard deviation <5°, posture analysis algorithm outputs lying probability P >0.7, alarm for 30s duration; Fall-risk behavior: acceleration jerk value More than 15m / s 3 , the posture analysis algorithm outputs the fall probability P >0.7 alarm; Curling Dangerous Behavior: Roll Angle >65°, the posture analysis algorithm outputs the curling probability P >0.7, alarm when it lasts for 120s and the ambient oxygen concentration is <19.5%; Crawling Dangerous Behavior: Pitch Angle <- 65°, the posture analysis algorithm outputs the crawling probability P>0.7, an alarm is triggered when it lasts for 120s and the ambient oxygen concentration is <19.5%.

[0014] The tool management module is used to stick or tie NFC tags on tools and scan and enter them with a tool scanner to manage the bringing in and taking out of tools and remind people not to leave tools behind. The abnormal alarm module is used to issue unauthorized intrusion alarms, abnormal gas alarms in the space, abnormal vital signs alarms, illegal behavior alarms, fire alarms, SOS alarms, and overcrowded operations in confined spaces alarms, etc., based on the monitoring results of on-site monitoring equipment through smart bracelets, PC systems, mobile systems, 3D systems in the control room, and text messages; A method for safety management of confined space operations comprises the following steps: S1. Before the operation, the operation approval process is initiated online, and the operation approval management module is connected to the work ticket information interface to complete the operation approval management; S2. During the operation, through the deployment of on-site monitoring equipment, real-time monitoring of the operation and abnormal alarm reminders are realized, including personnel entry and exit detection, gas detection, smart bracelet monitoring, video monitoring, etc. The alarm reminder methods include on-site monitoring equipment, smart bracelets, PC terminal systems, mobile terminal systems, three-dimensional terminal systems in the control room, and text messages; Through the operator management module, facial recognition is performed on operators and wristbands are bound to achieve authorized entry, record entry and exit records, locate the position and trajectory of operators in real time, monitor personnel vital signs, and remind abnormal signs, abnormal behavior, and actively call for help SOS; Through the tool management module, NFC tags are pasted or tied to tools, and scanned and entered with a tool scanner to manage the bringing in and taking out of tools and remind people not to leave tools behind. Through the abnormal alarm module, according to the monitoring of on-site monitoring equipment, through smart bracelets, PC terminal systems, mobile terminal systems, control room 3D terminal systems and text messages, etc., it can issue unauthorized personnel illegal intrusion alarms, abnormal gas alarms in the space, abnormal vital signs alarms, illegal behavior alarms, fire alarms, SOS alarms, and confined space overcrowding alarms. S3. When the operation is completed, a reminder will be given to check if there are any errors left, and the system will automatically archive the electronic documents.

[0015] The beneficial effects of the present invention are as follows: It realizes the full-process and all-round safety management of confined space operations, from pre-operation approval management to real-time monitoring and abnormal alarm reminders during operations, and then to archiving management after the operation, forming a complete safety management system; through the deployment of on-site monitoring equipment, it realizes real-time monitoring and abnormal alarm reminders of the operation site, improving the timeliness and accuracy of safety management; the setting of operator management and tool management modules effectively regulates personnel behavior and tool use, reducing safety risks; the multiple alarm methods of the abnormal alarm module ensure that abnormal situations can be notified to relevant personnel in a timely manner, improving the emergency response speed. The system and method are not only applicable to confined space operations in the power industry, but also to high-risk operations in other industries, and have broad promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a framework diagram of the confined space operation safety management system of the present invention.

[0017] Figure 2 This is a flow chart of the confined space operation safety management method of the present invention. DETAILED DESCRIPTION

[0018] The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings: like Figure 1As shown, the confined space operation safety management system of the present invention comprises an operation approval management module (100), an on-site monitoring device (200), an operation personnel management module (300), a tool management module (400), an abnormal alarm module (500) and an operation completion management module.

[0019] The job approval management module (100) is used to initiate the job approval process online, connect to the work ticket information interface, and implement pre-job approval management. After the job is completed, it reminds whether there are any errors left, and realizes automatic archiving of system electronic documents.

[0020] On-site monitoring equipment (200) is deployed at a confined space operation site, including personnel entry and exit detection equipment, gas detectors, smart bracelets, cameras, etc., for real-time monitoring of the operation process, and achieving real-time monitoring and abnormal alarm reminders during the operation.

[0021] The operator management module (300) is used to perform facial recognition on operators and bind a wristband to achieve authorized entry, record entry and exit records, locate the position and trajectory of operators in real time, monitor the vital signs of operators, and alert abnormal signs, abnormal behavior, and actively call for help SOS.

[0022] The tool management module (400) is used to stick or tie an NFC tag to a tool, and scan and input the tag using a tool scanner, thereby realizing the management of bringing in and taking out tools and reminding that tools are left behind.

[0023] The abnormal alarm module (500) is used to issue an unauthorized person illegal intrusion alarm, a gas abnormality alarm in the space, an abnormal vital sign alarm, an illegal behavior alarm, a fire alarm, an SOS alarm, a confined space overcrowding alarm, etc. through a smart bracelet, a PC terminal system, a mobile terminal system, a control room three-dimensional terminal system, and text messages based on the monitoring results of the on-site monitoring equipment.

[0024] In an embodiment of a boiler water wall inspection operation in a thermal power plant, an operator initiates a "Boiler Water Wall Inspection Work Order" through the operation approval management module (100). After the duty supervisor confirms the unit shutdown status and the safety supervision department verifies the list of protective equipment, the work order is reviewed through an electronic approval process.

[0025] When the operator arrives at the furnace entrance, the mobile personnel identification device captures the facial information, completes the comparison with the authorized list, successfully activates the positioning and monitoring function of the smart bracelet, and carries a portable gas detector and personnel positioning equipment. After the tools are entered into the tool management module (400) by the scanner gun, an electronic ledger is generated to achieve accurate binding with the operator. The system automatically verifies the consistency of the equipment list with the work order requirements and intercepts unauthorized or unqualified tools from entering the site.

[0026] After entering the operation phase, maintenance personnel rely on the GPS positioning module to achieve sub-meter-level trajectory tracking in the open area above the furnace. When the operation goes deep into the bottom pipe row area, the system detects the attenuation of the GPS signal and then seamlessly switches to the micro-inertial navigation mode. During the operation, when a dangerous situation occurs, such as when an operator loses balance and falls due to oil on the ground, the personnel positioning device captures the acceleration Jerk value suddenly increasing to 18.7m / s³ and lasts for 220ms. The posture analysis algorithm calculates the probability of falling P=0.93, triggering the alarm linkage: the bracelet immediately vibrates and flashes red to warn, and the LoRa communication module pushes the coordinates of the operator to the monitoring terminal.

[0027] After the operation is completed, the system automatically generates a report including a heat map of personnel trajectories and equipment usage records. When the exit scan finds that the tools have not been taken out, the tool management module (400) at the entrance and exit immediately triggers an audible and visual alarm.

[0028] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Those skilled in the art can make many modifications, changes, equivalent changes or modifications to the technical solution of the present invention by using the technical content disclosed above without departing from the scope of the technical solution of the present invention, which all fall within the protection scope of the present invention.

Claims

1. A confined space operation safety management system, characterized in that Including operation approval management module, on-site monitoring equipment, operator management module, tool management module, and abnormal alarm module; The job approval management module is used to initiate the job approval process online, connect to the enterprise work ticket information interface, and implement pre-job approval management; after the job is completed, it reminds whether there are any errors left, and realizes automatic archiving of system electronic documents; On-site monitoring equipment is deployed at the confined space operation site to monitor the operation process in real time, including personnel entry and exit detection equipment, gas detectors, smart bracelets, and cameras to achieve real-time monitoring and abnormal alarm reminders during the operation; The operator management module is used to perform facial recognition on operators and bind wristbands to achieve authorized entry, record entry and exit records, locate the position and trajectory of operators in real time, monitor vital signs of operators, and alert abnormal signs, abnormal behavior, and actively call for help SOS; The tool management module is used to stick or tie NFC tags on tools and scan and enter them with a tool scanner to manage the bringing in and taking out of tools and remind people not to leave tools behind. The abnormal alarm module is used to issue unauthorized intrusion alarms, abnormal gas alarms in the space, abnormal vital signs alarms, illegal behavior alarms, fire alarms, SOS alarms, and overcrowded operations in confined spaces alarms through smart bracelets, PC systems, mobile systems, three-dimensional systems in the control room, and text messages based on the monitoring results of on-site monitoring equipment.

2. A confined space operation safety management system according to claim 1, characterized in that: The operator management module adopts GPS+micro-inertial navigation fusion positioning technology and uses Lora for signal communication. It transmits the sensor signal to the operator management module for analysis and achieves full-scene coverage through a dynamic switching mechanism.

3. A confined space operation safety management system according to claim 2, characterized in that: In open areas, GPS signals are used to correct micro-inertial navigation trajectory errors, and in closed environments, the system switches to pure micro-inertial navigation mode. At the same time, the accelerometer and gyroscope are used to analyze the operator's movement posture in real time, and the threshold rule and posture analysis algorithm are used for comprehensive judgment to accurately identify abnormal alarms.

4. A confined space operation safety management system according to claim 3, characterized in that: The analysis of the operator's motion posture adopts the spatiotemporal attention convolutional network posture analysis algorithm, which includes the following core modules: The spatiotemporal feature extraction layer uses 3D convolution kernels to extract the spatiotemporal features of sensor data. : ； Adaptive attention layer dynamically weights key features through channel attention and spatial attention mechanisms: ； ； Among them, GAP is the global average pooling, GMP is the global maximum pooling, is the Sigmoid function; The spatiotemporal matrix of sensor data, Convolutional layer weights, Channel attention layer output, Spatial attention layer output, Convolutional layer bias, Multilayer Perceptron, Splicing layer, 2D convolutional layer, Element-wise multiplication method; The classification output layer outputs 13 posture categories, including standing, walking, running, lying, going up and down stairs, sitting, bending, turning, climbing, curling up, crawling, equipment operation, and falling: ； in, Output category, Posture category, The k-th posture classification output layer weight, Indicates The output layer bias of posture classification, Indicates The weights of the output layer for posture classification, Indicates The output layer bias for pose classification.

5. A confined space operation safety management system according to claim 4, characterized in that: The threshold rule and the posture analysis algorithm are comprehensively judged, that is, the judgment result of the threshold rule and the judgment result of the posture analysis algorithm are comprehensively judged, and the specific judgment rule for the dangerous behavior of lying down is as follows: Pitch Angle >65° and standard deviation <5°, posture analysis algorithm outputs lying probability P >0.7, alarm will be triggered after 30 seconds.

6. A confined space operation safety management system according to claim 5, characterized in that: The specific rules for determining fall-risk behaviors are as follows: Acceleration Jerk value is greater than 15m / s 3 , the posture analysis algorithm outputs the fall probability P >0.7 alarm.

7. A confined space operation safety management system according to claim 5, characterized in that: The specific rules for determining dangerous curling behavior are as follows: Curling Dangerous Behavior: Roll Angle >65°, the posture analysis algorithm outputs the curling probability P >0.7, lasts for 120s and the ambient oxygen concentration is <19.5% when the alarm is triggered.

8. A confined space operation safety management system according to claim 5, characterized in that: The specific rules for determining dangerous crawling behavior are as follows: Crawling Dangerous Behavior: Pitch Angle <-65°, the posture analysis algorithm outputs the crawling probability P>0.7, an alarm is triggered when it lasts for 120s and the ambient oxygen concentration is <19.5%.

9. A method for safety management of confined space operations, characterized in that: The following steps are involved: S1. Before the operation, the operation approval process is initiated online, and the operation approval management module is connected to the work ticket information interface to complete the operation approval management; S2. During the operation, the on-site monitoring equipment deployed can realize real-time monitoring of the operation and abnormal alarm reminders, including personnel entry and exit detection, gas detection, smart bracelet monitoring, and video monitoring. The alarm reminder methods include on-site monitoring equipment, smart bracelets, PC terminal systems, mobile terminal systems, three-dimensional terminal systems in the control room, and text messages; Through the operator management module, facial recognition is performed on operators and wristbands are bound to achieve authorized entry, record entry and exit records, locate the position and trajectory of operators in real time, monitor personnel vital signs, and remind abnormal signs, abnormal behavior, and actively call for help SOS; Through the tool management module, NFC tags are pasted or tied to tools, and scanned and entered with a tool scanner to manage the bringing in and taking out of tools and remind people not to leave tools behind. Through the abnormal alarm module, according to the monitoring of the on-site monitoring equipment, through the smart bracelet, PC terminal system, mobile terminal system, control room three-dimensional terminal system and SMS, it can send out unauthorized personnel illegal intrusion alarm, abnormal gas alarm in the space, abnormal vital sign alarm, illegal behavior alarm, fire alarm, SOS alarm, and confined space overcrowding alarm; S3. When the operation is completed, a reminder will be given to check if there are any errors left, and the system will automatically archive the electronic documents.

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