CN117436467A

CN117436467A - Intelligent management method for locking and hanging LOTO

Info

Publication number: CN117436467A
Application number: CN202311372279.1A
Authority: CN
Inventors: 丁又华; 方显强; 王�锋; 胡龙华
Original assignee: China Shipbuilding Lingjiu High Tech Wuhan Co ltd; 709th Research Institute of CSSC
Current assignee: China Shipbuilding Lingjiu High Tech Wuhan Co ltd; 709th Research Institute of CSSC
Priority date: 2023-10-23
Filing date: 2023-10-23
Publication date: 2024-01-23

Abstract

The invention provides an intelligent management method for locking and hanging a plate LOTO, which comprises the following steps: acquiring front-end equipment fault information through an intelligent LOTO system, and judging whether LOTO execution conditions are met according to the fault information; if the LOTO is judged to be required to be executed, triggering a LOTO online dispatch flow, enabling on-site operation and maintenance personnel to go to the on-site APP for sign-in, and executing LOTO on front-end equipment according to the regulations; judging whether LOTO execution is standard or not according to LOTO execution state information; if LOTO execution is not standard, stopping the equipment; if LOTO execution specification, continuing to monitor the operating state of the device. The invention can realize the real-time recording and inquiring of information such as the picking, returning, using position and using time of the lockset by using the electronic lockset management system. Meanwhile, an early warning mechanism can be arranged, and when an abnormal condition or an operation error is found, the system can timely give an alarm and inform related personnel to correct.

Description

Intelligent management method for locking and hanging LOTO

Technical Field

The invention relates to the field of equipment safety control, in particular to an intelligent management method for locking and hanging a plate LOTO.

Background

In an industrial production environment, lock out-tag (LOTO) is an important safety measure to ensure that equipment is not accidentally started or operated during maintenance, service or cleaning, thereby protecting the life safety of personnel while protecting the equipment from damage.

However, conventional LOTO implementations have some safety concerns and generally rely on the filling of off-line paper documents and manual subjective execution. Firstly, the use of paper documents may cause inconvenient information management, and timely recording and inquiring of information such as lock acquisition, use positions and use time are difficult to realize. In this case, the possibility of loss, error, or incompleteness of information increases, thereby affecting the accuracy and effectiveness of LOTO. Therefore, in order to improve the security and reliability of LOTO, a more intelligent management method is required.

Secondly, due to the lack of informatization management, the accurate and effective execution condition of LOTO cannot be confirmed in real time, and timely early warning and deviation correction cannot be performed on abnormal conditions. For example, if a device is accidentally started while LOTO is being performed, and is not discovered and handled in time, serious accidents and injuries may result. If the informatization management system is provided, the picking and using conditions of the lockset can be monitored in real time, abnormal conditions can be found in time, and corresponding measures are taken for correction and early warning.

Disclosure of Invention

The invention provides an intelligent management method for locking and hanging a plate LOTO, aiming at the technical problems in the prior art, comprising the following steps:

acquiring front-end equipment fault information through an intelligent LOTO system, and comparing the front-end equipment fault information with the existing fault information in an expert database;

judging whether LOTO executing conditions are met according to the comparison result;

if the LOTO is judged to be required to be executed, triggering a LOTO online dispatch procedure, and issuing a dispatch task to a field operation and maintenance person so that the field operation and maintenance person receives the dispatch task to go to a field APP to sign in and execute the LOTO on front-end equipment according to the regulation;

acquiring LOTO execution state information of field operation and maintenance personnel on the front-end equipment through a sensor of the front-end equipment and a field RFID device, and judging whether LOTO execution is standard or not according to the LOTO execution state information;

if the LOTO execution is detected to be out of specification, stopping the front-end equipment; if the LOTO execution specification, the running state of the front-end equipment is continuously monitored, and the lock on the locking point is ensured to be kept in a locked state.

According to the intelligent management method for the locking hanging plate LOTO, provided by the invention, the electronic lockset management system is used, so that the information such as the acquisition, return, using position and using time of the lockset can be recorded and queried in real time. Meanwhile, an early warning mechanism can be arranged, and when an abnormal condition or an operation error is found, the system can timely give an alarm and inform related personnel to correct.

Drawings

FIG. 1 is a flow chart of a method for intelligent management of locking and hanging LOTO;

FIG. 2 is a schematic diagram of the overall flow of the lock-up hang tag LOTO intelligent management method;

FIG. 3 is a schematic diagram of an automated determination process for determining whether LOTO is performed;

FIG. 4 is a schematic diagram of a LOTO execution state monitoring and verification process;

fig. 5 is a schematic diagram of the structure of the LOTO system functional module.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention. In addition, the technical features of each embodiment or the single embodiment provided by the invention can be combined with each other at will to form a feasible technical scheme, and the combination is not limited by the sequence of steps and/or the structural composition mode, but is necessarily based on the fact that a person of ordinary skill in the art can realize the combination, and when the technical scheme is contradictory or can not realize, the combination of the technical scheme is not considered to exist and is not within the protection scope of the invention claimed.

In order to improve and promote the management level of LOTO, the technical scheme of the invention introduces an informationized management system to make up for the defects of the traditional mode. The invention provides an intelligent management method for locking and hanging a plate LOTO. Among them, LOTO (Lockout-tag) is a procedure for securing devices, and protecting the safety of maintenance and service personnel by locking and marking the devices to prevent accidental start-up. To increase the efficiency and accuracy of executing the LOTO process, its flow may be streamlined and informationized.

The invention aims to change the LOTO hanging and locking execution flow from a traditional paper and manual operation mode to an on-line and informationized management mode. By introducing the computer system and the mobile device, operators and administrators can access information and documents related to the LOTO program on the electronic platform, thereby improving the work efficiency and accuracy. In addition, the safety and reliability are further improved by introducing a monitoring and verifying mechanism and an automatic judging auxiliary tool.

Referring to fig. 1 and 2, the locking and hanging LOTO intelligent management method provided by the invention comprises the following steps:

step 1, acquiring front-end equipment fault information through an intelligent LOTO system, and comparing the front-end equipment fault information with the existing fault information in an expert database.

The front-end equipment fault information is obtained through the LOTO intelligent system (normally, the front-end equipment is provided with a set of self-contained management system, the LOTO intelligent system obtains the equipment fault information through docking with the management system, the obtained information is text description information, the description content can be automatically output by the front-end equipment management system or can be filled by a front-end operator), and after the LOTO intelligent system obtains the front-end equipment fault information, the information is preprocessed and then submitted to an LOTO system expert database to be compared with the fault information in the expert database.

Specifically, the LOTO intelligent system acquires equipment fault information, the system preprocesses the information, and the preprocessing process comprises analyzing and extracting texts to acquire key information such as fault types, fault positions, fault reasons and the like.

The LOTO intelligent system then submits the processed device fault information to the LOTO system's expert library. A large amount of fault information has been stored in the expert database, including fault type, resolution, repair records, etc. The system compares and matches the acquired fault information of the front-end equipment with the information existing in the expert database. By means of comparative analysis, the system can quickly identify similar or identical fault conditions and provide corresponding solutions and maintenance suggestions.

As an embodiment, comparing and matching the obtained front-end fault information with existing fault information in the expert database, and identifying the similar or identical fault type of the front-end device through analysis and comparison includes: respectively storing the fault information of the front-end equipment and the existing fault information in the expert database into a variable text1 and a variable text2 in the form of text information; calling an editing distance function in a Levenshtein library, and calculating the editing distance between two text messages; calculating the similarity between the fault information of the front-end equipment and the existing fault information according to the editing distance between the two text information; if the similarity exceeds a set threshold, the front-end equipment fault information is matched with the existing fault information in the expert database; otherwise, the front-end equipment fault information is not matched with the existing fault information in the expert database.

It can be understood that, according to the historical fault information, an expert database is formed, and the expert database is optimized continuously, see fig. 3, and the steps for forming the expert database are as follows:

data collection and preprocessing: in the scheme, relevant fault information (including real-time and historical data) output by the field manual filling device management system is mainly collected. Meanwhile, the data are preprocessed, including data cleaning, feature extraction and the like, so that the related data information can be better processed by a subsequent algorithm.

Feature extraction: before the algorithm rule is formed, we need to perform feature engineering on the data. This includes selecting and constructing appropriate features to better represent the state and behavior of LOTO.

Rule engine design: and the design rule engine is used for executing automatic judgment and processing. And judging whether the LOTO flow is executed or not according to the set rules and algorithms.

And calculating the similarity between the fault information input by the user and the fault information of each fault type in the expert fault library by using a Levenshtein distance algorithm. The Levenshtein distance algorithm is an algorithm for calculating the similarity between two character strings. It measures the degree of difference between two strings by calculating the minimum number of editing operations required to convert one string into another.

Editing operations include inserting a character, deleting a character, and replacing a character. The Levenshtein distance algorithm calculates the minimum number of editing operations required to convert from one string to another.

The specific calculation method is carried out in a dynamic programming mode, the algorithm firstly creates a two-dimensional matrix, the rows of the matrix represent the characters of the first character string, and the columns represent the characters of the second character string. Then, by comparing each character, the edit distance of each position is calculated. Finally, the Levenshtein distance of the two character strings is obtained through the value of the rightmost bottom corner of the matrix, namely the editing distance of the last character.

The Levenshtein distance algorithm is widely applied to the fields of character string similarity calculation, spelling error correction and gene sequence comparison. The step of comparing and matching the fault information of the front-end equipment with the fault information existing in the expert database comprises the following steps:

(1) A Levenshtein library is imported that provides a function that calculates the edit distance between strings.

(2) Inputting text information: and storing the two fault information to be compared in the form of text information in the variables text1 and text2 respectively.

(3) Calculating an editing distance: and using an editing distance function in the Levenshtein library, taking text1 and text2 as parameters to be transmitted into the function, and calculating the editing distance between the text1 and the text 2.

(4) Calculating similarity

Similarity is calculated from the edit distance using the following formula:

similarity=1—edit distance/max (len (text 1), len (text 2)), len (text 1) is the length of the front-end device failure information, and len (text 2) is the length of the existing failure information in the expert database.

(5) Setting a threshold value

Whether the similarity exceeds the threshold is determined based on a set threshold, for example, 0.7.

If the similarity exceeds a threshold, the matching is considered to be successful, and the fault type can be used as one of matching results; if the similarity does not exceed the threshold, the match is deemed to fail and the fault type is not taken as one of the match results.

Optimization of the rule engine:

a machine learning algorithm is introduced: a machine learning algorithm is used to train the model to achieve more accurate fault matching. The existing fault library data are used for training, and a machine learning algorithm is utilized for learning the relation among fault types, fault positions and fault reasons, so that the accuracy of matching is improved.

And step 2, judging whether LOTO execution conditions are met according to the comparison result.

As an embodiment, the determining whether the LOTO execution condition is met according to the comparison result includes: according to the matching result, finding a fault record similar to the fault information of the front-end equipment in the expert database, and judging that the front-end equipment needs to execute the LOTO process if the fault record is confirmed to need to execute the LOTO process; if the fault record similar to the front-end equipment fault information is not found in the expert database, the process goes to a non-LOTO fault processing flow.

It will be appreciated that if a fault record similar to the front-end fault information is found in the expert database, the similarity exceeds a threshold value by a distance algorithm, and the fault record has been confirmed to require execution of the LOTO procedure, then execution of the LOTO procedure may be determined.

If the fault record similar to the front-end fault information is found in the expert database, the non-LOTO fault processing flow can be switched to by the fact that the similarity of the distance algorithm does not exceed the threshold value or the fault record similar to the front-end fault information is not found in the expert database.

For other fault processing flows which are not LOTO, the field operation and maintenance personnel confirms to the field, if fault information is found to be wrong, the LOTO is required to be executed, and then the LOTO execution flow is initiated again. After the operation and maintenance personnel reach the site, the fault type is found to be in accordance with the LOTO executing condition through primary detection of the fault equipment, the site condition is fed back through the APP, and the LOTO executing flow is initiated again.

Precipitating fault information of the equipment to an expert database, comprising:

(1) And (3) fault information collection: when there is a need to perform the input of fault information of LOTO, it is necessary to collect relevant fault information in time. Such information may include fault descriptions, error codes, log records, monitoring data, and the like.

(2) Fault recording: after the fault is resolved, the fault condition and the solution need to be recorded. The records may include detailed descriptions of the failure, steps of the solution, links to related documents, and so forth.

(3) And (5) updating a fault library: and adding the recorded fault information and the recorded solutions to an expert fault library. Experience can be accumulated and shared, and the inquiry and the solution when similar faults are encountered later are convenient.

(5) And (3) maintaining a fault library: the fault library is maintained and updated regularly, including adding new fault information, deleting outdated information, optimizing classification and indexing, etc., to maintain the accuracy and availability of the fault library.

And step 3, if the LOTO is judged to be executed, triggering an LOTO online dispatch procedure, and issuing dispatch tasks to on-site operation and maintenance personnel so that the on-site operation and maintenance personnel can receive the dispatch tasks to go to the on-site APP for signing in and execute the LOTO to the front-end equipment according to the regulations.

As an embodiment, if it is determined that the LOTO needs to be executed, triggering the on-LOTO dispatch procedure to send a dispatch task to a field operation and maintenance personnel includes: when the front-end equipment fault information acquired by the intelligent LOTO system is used for judging that the LOTO process needs to be executed, the intelligent LOTO system determines a dispatch task according to a dispatch target, wherein the dispatch task comprises a position and a range of the LOTO to be executed, a specification of the LOTO to be executed, the number of the front-end equipment for executing the LOTO and the execution time; and issuing the order-sending task to an order-sending person through an online order-sending channel, and tracking the receiving condition of the order-sending task, wherein the online order-sending channel comprises an E-mail, an instant messaging tool, a project management platform or an enterprise internal system.

It can be understood that, when the LOTO intelligent system acquires the fault information and determines that the LOTO procedure needs to be executed, the LOTO system executes according to the following steps:

(1) Determining a dispatch target: and determining the task or item to be dispatched, and definitely specifying the specific requirement, quantity and time of dispatching.

(2) Determining a dispatch channel: an appropriate online delivery channel is selected, such as an email, instant messaging tool, project management platform, or enterprise internal system, etc.

(3) Determining the person sending: the responsible person who determines the dispatch may be a project manager, team leader, or dispatch specialist, etc.

(4) Issuing dispatch information: and sending the dispatch templates to corresponding personnel or team, so as to ensure that all personnel receiving the dispatch can receive and know the task requirements.

(5) Confirmation of reception: the receipt of the dispatch is tracked, ensuring that everyone has received the task and confirming whether they understand the task's requirements and expiration date.

(6) Support and assistance are provided: if desired, the order taker may provide support and assistance, such as solving problems associated with the task, providing resources, or providing guidance.

(7) Monitoring and tracking progress: the dispatching personnel need to monitor and track the progress of the task, ensure that the task is completed on time, and communicate and coordinate with the executive in time.

(8) Feedback and evaluation: after the task is completed, feedback and evaluation are carried out, and comments and suggestions of the executive personnel are collected so as to improve the dispatch process and the work efficiency.

(9) Record and summarize: and recording the process and the result of the dispatch for future reference and duplication, and summarizing experience training at the same time to provide reference for the next dispatch.

The field operation and maintenance personnel receive the work order to go to the field APP to sign in and execute LOTO according to the specification.

(1) Receiving a work order: after receiving the work order, the on-site operation and maintenance personnel receives the work order on the on-site operation and maintenance management system or the related APP and checks detailed information of the work order, including the work order number, the work content, the work place and the like.

(2) Signing: after the on-site operation and maintenance personnel arrive at the working place, sign-in is carried out on the APP.

(3) Preparation: after check-in, the field service personnel first need to perform the necessary preparation, including wearing personal protective equipment, checking the integrity of the tool equipment, preparing the required materials, etc.

(4) LOTO concrete implementation method: the field operation and maintenance personnel perform LOTO (Lockout-Tagout) operation according to the requirements of the worksheet and related security regulations. The general procedure is as follows (the specific procedure depends on the field requirements):

a. and (3) performing operations such as power failure, gas stopping and the like on related equipment or systems to ensure that the equipment or systems are in a safe state.

b. The special lockset and the sign board are used for isolating the energy sources on the equipment or the system, so that misoperation is prevented.

c. And (3) mounting a nameplate at the position of the isolating switch or the valve, clearly indicating that the equipment or the system is isolated, and noting the name and the contact way of the isolating personnel.

d. The lock with the RFID tag ensures that each isolation point has an independent lock, and the key of the lock is stored in a special place.

e. Checking the isolation points ensures that the isolation operation is firm and reliable, and the condition of leakage isolation does not exist.

And 4, acquiring LOTO execution state information of the front-end equipment by field operation and maintenance personnel through a sensor of the front-end equipment and a field RFID device, and judging whether LOTO execution is standard or not according to the LOTO execution state information.

It will be appreciated that referring to fig. 4, by combining RFID tag contrast with monitoring and verification of the front-end sensor, the system can monitor and verify the execution of the LOTO program in real time. Therefore, when an operator performs maintenance, maintenance or other work needing to lock and identify dangerous energy sources, the LOTO program can be executed correctly, and the workability and the reliability are improved.

Wherein, RFID label contrast:

RFID tags are mounted on locking points of a device or work area, each tag having a unique identification code.

When the LOTO program is executed, an operator signs in to confirm the dispatch information including the work area, the equipment name, the locking point and the like through the APP.

When the LOTO lockset is hung on a corresponding failure equipment energy cut-off/release point, the RFID tag on the lockset and the equipment energy cut-off/release point automatically perform information matching, and if the matching is successful, the LOTO program can be judged to be executed correctly.

Front end sensor monitoring and verification:

and installing a sensor at a key part of the equipment for monitoring the state change of the equipment.

When executing the LOTO program, the operator enters the execution steps and related information into the system.

The system can monitor the state change of the equipment in real time, such as the power-on condition, the air pressure in the pipeline and the like, and whether the equipment is in a safety state of closing, no pressure or low pressure and the like.

If the system detects that the device status is consistent with the requirements in the LOTO program, the system will verify that the LOTO program was executed correctly.

And (5) maintaining the locking of the fault equipment, and after the maintenance personnel finishes the operation and maintenance, filling in related records by the APP, and releasing the LOTO locking.

(1) APP fills out the relevant records:

after equipment maintenance is completed, maintenance personnel log in by using the designated APP and fill in relevant maintenance records. The records include information on service time, service content, tools and materials used, service personnel, etc. Maintenance personnel need to ensure accurate and complete filling and timely submitting.

(2) Releasing the LOTO lock:

after maintenance personnel complete maintenance, the equipment is confirmed to be in a safe state, and no faults and risks exist.

Maintenance personnel unlock the energy source of the device using a dedicated key and remove the lock.

Maintenance personnel need to ensure that the equipment is functioning properly and that the necessary tests and checks are performed.

After releasing the LOTO lock, the device may be put back into use.

And (5) finishing LOTO flow execution.

Step 5, if the LOTO execution is detected to be out of specification, stopping the front-end equipment; if the LOTO execution specification, the running state of the front-end equipment is continuously monitored, and the lock on the locking point is ensured to be kept in a locked state.

It will be appreciated that when an execution LOTO execution non-specification is detected, the LOTO system controls the PLC system to issue a shutdown command to the failed device.

(1) And (3) issuing a shutdown instruction: once it is determined that shutdown is required, the PLC system will issue a shutdown command to the device by controlling the output module. The specific shutdown command may be determined according to a control manner of the device, for example, sending a stop signal to the device, cutting off power, etc.

(2) Monitoring a shutdown state: the LOTO system needs to monitor the shutdown status of the device to ensure that the device has completely stopped running.

The LOTO system records the violation of LOTO execution operation, and mainly comprises the following steps:

(1) The recording function in the LOTO system is used to describe in detail the violations, including the specific operation of the violation, the identity of the offender, the time of the violation, etc.

(2) A record of the violation event is created in the LOTO system and the necessary fields are filled in, such as the type of violation, the description of the violation, the person of the violation, etc.

Referring to fig. 5, there is provided an intelligent management system for locking and hanging a card LOTO according to the present invention, the functional modules include:

the main functions of the fault information acquisition module 1 are as follows:

and (3) data acquisition: fault-related data, such as sensor data, log files, alarm information, etc., is obtained from the device or system.

Data preprocessing: and cleaning, filtering and correcting the acquired data to ensure the accuracy and consistency of the data.

Feature extraction: useful features are extracted from the preprocessed data for use as a basis for fault determination. The features may be of numeric, text or image type, etc.

Feature selection: the features most representative of the fault condition are selected from the extracted features, and redundant or uncorrelated features are excluded.

And (3) constructing a fault model: and establishing a fault model according to known fault cases or expert knowledge, wherein the fault model comprises relations among fault types, fault reasons and fault characteristics, and forming an expert database.

The LOTO execution determination module 2 has the following main functions:

and (3) fault identification: by analyzing and processing the front-end fault information, the fault condition which may need to be executed is identified. These faults may be equipment faults, electrical faults, mechanical faults, etc.

Expert database matching: and matching the front-end fault information with the fault information stored in the expert database. The expert database contains various possible fault conditions and corresponding requirements and steps for executing the LOTO program.

Determining to execute LOTO: based on the matching result of the front-end fault information and the expert database, the module can determine whether the LOTO program needs to be executed. If the matching result indicates that the fault condition requires the LOTO program to be executed, the module sends out corresponding indication and warning.

The LOTO management module 3 has the following main functions:

and (3) system setting management: functions providing basic settings and configuration for LOTO systems, including user management (adding, deleting, editing user information), rights management (setting user roles and rights), workflow settings (defining dispatch procedures, specifying auditors, etc.), and the like.

And (5) dispatch flow management: the method provides functions of creating, editing and deleting the dispatch tasks, and comprises the steps of designating a task responsible person, setting task deadlines, filling in task descriptions, accessories and the like. An administrator can distribute, adjust and track the tasks to ensure the smooth execution of the tasks.

Workflow management: definition and management functions of the dispatch list process are provided, including creating and editing a workflow, setting process nodes and circulation rules, designating approval personnel and auditing conditions, and the like. An administrator can customize the dispatch process according to the actual demands of the organization, and the specification and the high efficiency of the workflow are ensured.

Task monitoring and statistics: the method provides monitoring and statistics functions for the dispatch tasks, and comprises the steps of checking the task state, progress, responsible persons and other information, and grasping the execution condition of the tasks in real time. The administrator can generate a statistical report, analyze the completion condition and efficiency of the task, and perform corresponding optimization and improvement.

Notification and alert functions: the method and the device provide the functions of dispatching the tasks and reminding, and comprise the steps of creating, distributing, completing and the like, so that relevant personnel are ensured to know the progress and change of the tasks in time, and the cooperation efficiency is improved.

Recording and archiving management: the record and archiving management function of the dispatch tasks is provided, including the storage of the history record and the related documents of the tasks, so that the follow-up inquiry and audit are facilitated. An administrator can archive and archive tasks, release system resources and ensure the security of data.

The LOTO execution monitoring and verification module 4 comprises an RFID and front-end sensor support:

RFID tag:

durable RFID tags suitable for industrial environments are selected to withstand harsh operating conditions such as high temperature, humidity and mechanical shock.

RFID tags should have waterproof, dustproof, corrosion-resistant properties to ensure reliable operation in a variety of environments.

RFID reader:

and the RFID reader-writer is respectively arranged on the equipment and the lockset so as to realize reading of one-to-one identification of the equipment and the lockset.

The mounting position of the reader-writer should ensure that the information of the RFID tag can be accurately read in consideration of the reading distance and direction.

Programming and configuration of RFID tags:

the unique identification information of the device is programmed and stored on the RFID tags on the device and lock.

And associating the unique identification of the equipment with a preset locking state so as to carry out comparison in the follow-up verification.

Voltage and current monitor:

the power on-off monitoring device is used for monitoring the power on-off condition of front-end equipment facilities.

Energy pressure and temperature sensor:

for monitoring the pressure, temperature, etc. inside the front-end equipment (pipes etc.).

The specific functions of the module are as follows:

monitoring the running state of equipment: the operating state of the device is monitored using a sensor to ensure that the device cannot be started in a locked state. For example, a current sensor may be used to monitor whether the current of the device is zero, a temperature sensor may be used to monitor whether the temperature of the device exceeds a preset range, etc. Through the monitoring of the sensors, the equipment can be ensured to be unable to normally operate in a locking state, and the safety of the equipment is further enhanced.

Application of RFID technology: in the lock state verification process, RFID technology is used for auxiliary verification of the device. The specific implementation method is that an RFID reader-writer and an RFID tag are respectively arranged on the equipment and the lockset. And the RFID reader-writer reads the RFID tags on the equipment and the lockset to acquire one-to-one identification of the equipment and the lockset, and only if the RFID equipment on the lockset and the corresponding alarm equipment successfully reads data mutually, the equipment can be assisted to verify that the equipment is successfully locked.

The LOTO system data module 5 has the following specific functions:

a device list: a device table is created containing fields for the unique identifier of the device, the device name, the device type, etc. Other relevant information may be added as needed, such as device model, manufacturer, etc.

Lockset distribution: a lock table is created for recording information of the locks. Including the unique identifier of the lock, the type of lock, the device to which it belongs, etc. It is contemplated that other fields may be added, such as lock status (allocated, unallocated), allocation time, etc.

And (3) a blocking step: a lockout step table is created for recording information of lockout steps. Including step number, step description, belonging device, etc. It is contemplated that other fields may be added such as step status (completed, incomplete), completion time, etc.

Notice that: a notice table is created for recording notes associated with the LOTO program. Including the unique identifier of the note, the content, the device to which it belongs, etc. It is contemplated that other fields may be added, such as creation time, update time, etc.

The intelligent management method for locking and hanging LOTO provided by the embodiment of the invention has the following advantages:

(1) The accuracy and the high efficiency of LOTO execution flow are improved: by means of on-line and informationized management, information such as acquisition, use positions and use time of the lockset can be recorded and queried in real time, abnormal conditions can be found timely, and corresponding measures can be taken for correction and early warning.

(2) Safety and reliability are improved: the safety and reliability of the equipment can be further ensured by introducing a monitoring and verifying mechanism and an automatic judging auxiliary tool.

(3) Work efficiency and accuracy are improved: through the electronic lockset management system, locksets can be conveniently managed and maintained, and the working efficiency and accuracy are improved.

(4) Real-time early warning and deviation correcting: when an abnormal condition or an operation error is found, the system can give an alarm in time and inform relevant personnel to correct.

In the foregoing embodiments, the descriptions of the embodiments are focused on, and for those portions of one embodiment that are not described in detail, reference may be made to the related descriptions of other embodiments.

It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the invention.

It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims

1. The intelligent management method for locking and hanging the LOTO is characterized by comprising the following steps of:

2. The intelligent management method for locking and hanging a card LOTO according to claim 1, wherein the acquiring, by the intelligent LOTO system, the front-end equipment failure information further includes:

acquiring front-end equipment fault information through an intelligent LOTO system, wherein the front-end equipment fault information is text description information;

and analyzing and extracting the text description information to obtain key information, wherein the key information comprises a fault type, a fault position and a fault reason.

3. The intelligent management method of locking hanging plate LOTO according to claim 2, wherein a plurality of existing fault information is stored in the expert database, and the existing fault information includes fault type, solution and maintenance record;

comparing the front-end equipment fault information with the existing fault information in the expert database, wherein the method comprises the following steps:

and comparing and matching the acquired front-end fault information with the fault information in the expert database, identifying the similar or same fault type of the front-end equipment through analysis and comparison, and providing corresponding solutions and maintenance suggestions.

4. The intelligent management method for locking and hanging a card LOTO according to claim 3, wherein comparing and matching the obtained front-end fault information with the fault information existing in the expert database, and identifying the similar or same fault type of the front-end equipment through analysis and comparison, comprises:

respectively storing the fault information of the front-end equipment and the existing fault information in the expert database into a variable text1 and a variable text2 in the form of text information;

calling an editing distance function in a Levenshtein library, and calculating the editing distance between two text messages;

calculating the similarity between the fault information of the front-end equipment and the existing fault information according to the editing distance between the two text information;

if the similarity exceeds a set threshold, the front-end equipment fault information is matched with the existing fault information in the expert database; otherwise, the front-end equipment fault information is not matched with the existing fault information in the expert database.

5. The intelligent management method for locking a hang tag LOTO according to claim 4, wherein the determining whether the LOTO execution condition is met according to the comparison result comprises:

according to the matching result, finding a fault record similar to the fault information of the front-end equipment in the expert database, and judging that the front-end equipment needs to execute the LOTO process if the fault record is confirmed to need to execute the LOTO process;

if the fault record similar to the front-end equipment fault information is not found in the expert database, the process goes to a non-LOTO fault processing flow.

6. The intelligent management method for locking and hanging a card LOTO according to claim 1, wherein if it is determined that LOTO needs to be executed, triggering an on-LOTO dispatch procedure to send a dispatch task to a field operation and maintenance person, comprising:

when the front-end equipment fault information acquired by the intelligent LOTO system is used for judging that the LOTO process needs to be executed, the intelligent LOTO system determines a dispatch task according to a dispatch target, wherein the dispatch task comprises a position and a range of the LOTO to be executed, a specification of the LOTO to be executed, the number of the front-end equipment for executing the LOTO and the execution time;

and issuing the order-sending task to an order-sending person through an online order-sending channel, and tracking the receiving condition of the order-sending task, wherein the online order-sending channel comprises an E-mail, an instant messaging tool, a project management platform or an enterprise internal system.

7. The intelligent management method for locking and hanging a card LOTO according to claim 1, wherein the steps of enabling a field operation and maintenance person to accept a dispatch task to go to a field APP to check in and execute LOTO on a front-end device according to a specification include:

after receiving the dispatching task, the on-site operation and maintenance personnel receives the dispatching task on the on-site operation and maintenance management system or the related APP and checks detailed information of the dispatching task, including the work order number, the work content and the work place;

after the on-site operation and maintenance personnel arrive at the working place, sign in is carried out on the App;

and according to the requirements of the dispatch tasks and related safety regulations, the on-site operation and maintenance personnel execute LOTO operation on the front-end equipment.

8. The intelligent management method for locking and hanging a card LOTO according to claim 7, wherein the on-site operation and maintenance personnel performs a LOTO operation on a front-end device according to requirements of a dispatch task and related security regulations, comprising:

performing energy release and energy cutting operation on the front-end equipment to ensure that the front-end equipment is in a safe state;

isolating and identifying energy sources on front-end equipment by using a special lockset and a signboard;

a signboard is arranged at the position of the isolating switch or the valve to indicate that the front-end equipment is cut off and isolated, and the name and the contact way of isolating personnel are noted;

the energy points with potential safety hazards on each equipment facility needing to perform LOTO maintenance are locked by using the lock with the RFID tag.

9. The intelligent management method for locking and hanging a card LOTO according to claim 8, wherein the step of obtaining LOTO execution status information of a field operation and maintenance person on the front-end device through the sensor of the front-end device and the field RFID device, and determining whether the LOTO execution is standard according to the LOTO execution status information includes:

a sensor is arranged at a key part of the front-end equipment and used for detecting state change information of the front-end equipment, wherein the state change information of the front-end equipment comprises information about whether energy is fully released and isolated is cut off;

and if the state change information of the front-end equipment is detected to be consistent with the requirement in the LOTO program, determining that the LOTO execution meets the specification.

10. The intelligent management method for locking and hanging a card LOTO according to claim 9, wherein if it is determined that the LOTO execution does not meet the specification, the PLC is controlled to issue a shutdown instruction to the faulty device to shutdown the faulty device;

and recording the violation information of the LOTO execution job, wherein the violation information comprises specific operation of the violation, the identity of a violation operator and the time of the violation operation.