A laboratory safety and emergency training system based on VR technology

Abstract

The present invention discloses a laboratory safety and emergency training system based on VR technology, which belongs to the field of safety training technology, and includes: a laboratory environment simulation unit, which builds a visual environment simulation model consistent with an actual laboratory; a human-computer interaction unit, which simulates the actual operation of an operator in the visual environment simulation model; a feedback guidance unit, which provides error correction guidance for the operator's operation behavior; an accident simulation unit, which determines whether the operation behavior constitutes a simulated accident; and an early warning decision unit, which formulates an escape buffer time. The present invention can determine whether a safety accident will occur according to the operation behavior of the operator. When it is determined that a safety accident will occur, a comprehensive analysis can be performed based on the risk value of the current step and the environmental impact value of the current laboratory to determine the severity of the accident, so that the operator can have a deeper impression of his or her own operation behavior, thereby reducing the errors that occur during actual operation.

Description

Technical Field

[0001] The present invention belongs to the technical field of safety training, and in particular relates to a laboratory safety and emergency training system based on VR technology. Background Art

[0002] The laboratory is a place for scientific research experiments. There are many dangerous items in it, and safety accidents are prone to occur. Therefore, in order to enhance the safety awareness of employees, strengthen the timely response and handling of various emergencies and incidents in the laboratory, effectively control the development of the situation, minimize the accompanying disaster losses and injuries, and reduce the disasters caused by accidents to a minimum, laboratory personnel are generally organized to conduct safety emergency training and drills.

[0003] Existing laboratory safety drills are mostly practical operations. For example, during a fire safety drill, a safety alarm is set. When the alarm is pressed, other personnel in the laboratory are notified to evacuate safely within a specified time. However, drills cannot determine the severity of an accident. If an accident actually occurs, the operator cannot judge the severity of the accident, nor can they handle it accordingly, which will cause additional property losses and casualties. Summary of the invention

[0004] The purpose of the present invention is to provide a laboratory safety and emergency training system based on VR technology to solve the problems faced in the above-mentioned background technology.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A laboratory safety and emergency training system based on VR technology, the system comprising:

[0007] A laboratory environment simulation unit, wherein the laboratory environment simulation unit is used to build a visual environment simulation model consistent with the actual laboratory according to the environment layout of the laboratory;

[0008] A human-computer interaction unit, the human-computer interaction unit being connected to the laboratory environment simulation unit and used to simulate actual operations of an operator in a visual environment simulation model;

[0009] A feedback guidance unit, which is used to record the operator's operation behavior in real time and provide immediate error correction guidance;

[0010] An accident simulation unit, the accident simulation unit is used to determine whether to generate a simulated accident according to the operation behavior of the operator;

[0011] An early warning decision unit is used to set an escape buffer time for the operator based on the generated simulated accident.

[0012] Furthermore, the method for the accident simulation unit to generate a simulated accident is:

[0013] The feedback guidance unit is provided with a plurality of guidance steps, each of which is set with a corresponding risk level;

[0014] When the operator's operation steps are inconsistent with the guidance steps, it is considered that the operator has made an operation error, and the risk level K under the operation step is obtained;

[0015] The obtained risk level K is compared with the system preset risk level threshold K th 1. Compare:

[0016] When K>K th 1, a simulated accident is generated;

[0017] Otherwise, proceed to the next step after providing correction guidance for the operation.

[0018] Furthermore, the simulated accidents are divided into general simulated accidents and serious simulated accidents;

[0019] First, through the formula Dd = α 1 *R+α 2 *V determines the severity of the accident Dd;

[0020] When Dd<Dd x It is judged as a general simulated accident;

[0021] When Dd≥Dd x It is judged as a serious simulated accident;

[0022] Among them, Dd x is the accident severity threshold preset by the system, R is the current step risk value, V is the current environmental impact value, α 1 and α 2 is the proportionality coefficient.

[0023] Furthermore, the risk value R of the step is obtained by:

[0024] The step risk value R is obtained by the following formula;

[0025]

[0026] Among them, K th 2 is another risk level threshold preset by the system, and K th 1<K th 2.

[0027] Furthermore, the method for obtaining the environmental impact value V is:

[0028] The environmental impact value V is obtained by the following formula;

[0029]

[0030] Among them, S is the volume of the laboratory, n is the type of dangerous substances in the laboratory, E i is the hazard level of the i-th hazardous object, β i is the weight coefficient of the ith hazardous object, Q people is the number of people in the laboratory, Φ is the laboratory's containment coefficient, and i∈[1,n].

[0031] Furthermore, the method by which the early warning decision unit formulates the escape buffer time is:

[0032] When it is judged to be a serious simulated accident, the escape buffer time t=0;

[0033] When it is judged as a general simulated accident, the distance L between the accident point and the escape exit and the layout complexity N of the laboratory location are obtained;

[0034] Then through the formula Calculate the escape buffer time t;

[0035] in, is the conversion coefficient, τ 1 and τ 2 is the weight coefficient, L 0 is the control escape distance preset by the system, N 0 The comparison layout complexity preset for the system.

[0036] Furthermore, the feedback guidance unit is also used to judge the operation standardization of the operator according to the operation behavior of the operator, and the judgment method is:

[0037] In a period ΔT, obtain the number of operating errors B and the duration Tm of each operation made by the operator in the period j ;

[0038] By formula Find the standard value K;

[0039] The obtained standard value K is compared with the standard threshold K preset by the system th Make a comparison;

[0040] When K>K th When the operator fails to operate in a standardized manner,

[0041] Where m is the total number of operation steps in the cycle, j∈[1,m], and ΔTm is the standard time duration for each operation step.

[0042] Beneficial effects of the present invention:

[0043] 1. The present invention uses VR technology to simulate a visual environment simulation model that is consistent with the actual laboratory, and gives the operator a personal interactive experience through the human-computer interaction unit. Then, the correctness of the operation steps is judged according to the operator's operation behavior. When it is incorrect, the feedback guidance unit provides instant error correction guidance, thereby training the operator, which can increase the operator's operation specifications and ensure safety.

[0044] 2. The present invention can determine whether a safety accident will occur based on the operator's operating behavior. When it is determined that a safety accident will occur, a comprehensive analysis can be performed based on the risk value of the current step and the environmental impact value of the current laboratory to determine the severity of the accident. This makes it easier for the operator to have a deeper impression of his or her operating behavior, thereby reducing errors that occur during actual operations.

[0045] 3. The present invention can also formulate an escape buffer time according to the severity of the simulated accident through the early warning decision unit, so that when an actual accident occurs, the operator can roughly understand his escape time, so as to carry out corresponding emergency treatment of the laboratory accident within the escape time to reduce property losses and casualties.

[0046] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0048] Figure 1 It is a structural block diagram of the laboratory safety and emergency training system of the present invention. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0050] In one embodiment, a laboratory safety and emergency training system based on VR technology is disclosed, such as Figure 1 As shown, the system includes:

[0051] The laboratory environment simulation unit is used to build a visual environment simulation model consistent with the actual laboratory according to the laboratory environment layout;

[0052] A human-computer interaction unit, the human-computer interaction unit is connected to the laboratory environment simulation unit and is used to simulate the actual operation of the operator in the visual environment simulation model;

[0053] Feedback guidance unit, which is used to record the operator's operation behavior in real time and provide immediate error correction guidance;

[0054] An accident simulation unit, which is used to determine whether to generate a simulated accident based on the operator's operating behavior;

[0055] The early warning decision unit sets an escape buffer time for operators based on the generated simulated accidents.

[0056] Through the above technical scheme, the present application simulates a visual environment simulation model consistent with the actual laboratory through VR technology, gives the operator a personal interactive experience through the human-computer interaction unit, and then judges whether the operation steps are correct according to the operator's operation behavior. When incorrect, the feedback guidance unit provides immediate error correction guidance, thereby training the operator, which can increase the operator's operation specifications and ensure safety; at the same time, it can also judge whether a safety accident will occur according to the operator's operation behavior. When it is judged that a safety accident will occur, a comprehensive analysis can be performed based on the risk value of the current step and the environmental impact value of the current laboratory to determine the severity of the accident, which is convenient for the operator to have a deeper impression of his own operation behavior, thereby reducing errors in actual operation; in addition, when a simulated accident occurs, the early warning decision-making unit can also be used to formulate an escape buffer time according to the severity of the simulated accident, so that when an actual accident occurs, the operator can roughly understand his escape time, so as to deal with the laboratory accident accordingly within the escape time, so as to reduce property losses and casualties.

[0057] As an embodiment of the present invention, the method for the accident simulation unit to generate a simulated accident is:

[0058] There are multiple guidance steps in the feedback guidance unit, and each guidance step is set with a corresponding risk level;

[0059] When the operator's operation steps are inconsistent with the guidance steps, it is considered that the operator has made an operation error, and the risk level K under the operation step is obtained;

[0060] The obtained risk level K is compared with the system preset risk level threshold K th 1. Compare:

[0061] When K>K th 1, a simulated accident is generated;

[0062] Otherwise, proceed to the next step after providing correction guidance for the operation.

[0063] Through the above technical scheme, this embodiment provides a specific method for the accident simulation unit to generate a simulated accident. When the laboratory operator operates improperly, some safety accidents may occur, but not all improper operations will cause safety accidents. Therefore, in order to confirm whether improper operation will cause hidden dangers of safety accidents, this embodiment is provided with multiple guidance steps in the feedback guidance unit, and each guidance step is set with a corresponding risk level, which is determined according to human experience. Then the operator performs the corresponding operation according to the guidance. When the operator's operating steps are inconsistent with the guidance steps, it is considered that the operator has an operating error at this time, and the risk level K under the operating step is obtained, and the obtained risk level K is compared with the risk level threshold K preset by the system. th 1 for comparison, when K>K th 1, it means that the risk level of this step is high. If an error occurs in this operation step, it is very likely to cause a safety accident, so a simulated accident is generated; otherwise, it means that the risk level of this step is low and will not cause a safety accident. The feedback guidance unit will provide error correction guidance for the operation and then continue with the next step. In this way, operators can know more clearly whether errors in their operation steps will cause laboratory safety hazards, so as to regulate their own operation behaviors.

[0064] In the above technical solution, the system presets the risk level threshold K th 1 Determined based on empirical data, which will not be elaborated in detail here.

[0065] As an implementation mode of the present invention, the simulated accident is divided into a general simulated accident and a serious simulated accident;

[0066] First, through the formula Dd = α 1 *R+α 2 *V determines the severity of the accident Dd;

[0067] When Dd<Dd x It is judged as a general simulated accident;

[0068] When Dd≥Dd x It is judged as a serious simulated accident;

[0069] Among them, Dd x is the accident severity threshold preset by the system, R is the current step risk value, V is the current environmental impact value, α 1 and α2 is the proportionality coefficient;

[0070] The method for obtaining the step risk value R is as follows: the step risk value R is obtained by the following formula;

[0071]

[0072] Among them, K th 2 is another risk level threshold preset by the system, and K th 1<K th 2;

[0073] The method for obtaining the environmental impact value V is as follows: the environmental impact value V is obtained by the following formula;

[0074]

[0075] Among them, S is the volume of the laboratory, n is the type of dangerous substances in the laboratory, E i is the hazard level of the i-th hazardous object, β i is the weight coefficient of the ith hazardous object, Q people is the number of people in the laboratory, Φ is the laboratory's containment coefficient, and i∈[1,n].

[0076] Through the above technical solution, this embodiment provides the severity of the simulated accident generated when determining the occurrence of the simulated accident. First, the simulated accident is divided into a general simulated accident and a serious simulated accident, so that the operator can clearly understand the severity of the accident, thereby facilitating subsequent judgment; then, the formula is first used to Get the step risk value R, when the risk level of the operation step K∈(K th 1. K th 2), then R=R 1 , when the risk level of the operation step K∈[K th 2, +∞), then R=R 2 , due to R 2 >R 1 , so the step risk value can be determined according to the risk level of the operation step. It can be seen that the higher the risk level of the operation step, the greater the corresponding step risk value; and the severity of the accident is not only related to the risk value of the operation step, but also to its environmental factors. For example, when the risk value of an operation step is very large, but there are few dangerous substances in the laboratory, the severity of the safety accident caused by this may not be large. Therefore, in order to more accurately judge the severity of the accident, the formula Get the environmental impact value V from the formula It can be seen that when the proportion of dangerous substances in the laboratory is higher, the safety accident will be more serious. When the number of people in the laboratory is more, or the airtightness of the laboratory is worse, the safety accident will be more serious. Therefore, the formula Perform comprehensive analysis to obtain the environmental impact value; then combine the obtained step risk value through the formula Dd = α 1 *R+α 2 *V conducts a comprehensive analysis to obtain the accident severity Dd. It can be seen that the greater the step risk value and the greater the environmental impact value, the greater the corresponding accident severity. Therefore, the obtained accident severity Dd is compared with the accident severity threshold Dd preset by the system. x For comparison: When Dd<Dd x When Dd≥Dd x In this way, a comprehensive analysis can be conducted based on the risk value of the operating steps and the environmental impact value of the laboratory to determine the severity of the simulated accident. This makes it easier to analyze according to the actual situation of the laboratory, making the simulated safety accident more realistic and accurate, so that operators can have a clearer understanding of the occurrence of safety accidents in reality to ensure the safety of operators.

[0077] In the above technical solution, the accident severity threshold Dd preset by the system x , proportionality coefficient α 1 , α 2 , another risk level threshold K preset by the system th 2 can all be determined based on actual empirical data, while the volume S of the laboratory, the types n of hazardous substances in the laboratory, and the laboratory's airtightness coefficient Φ can be determined artificially based on the laboratory's layout and records. The hazard level of each hazardous substance can be determined based on the introduction of related hazardous substances in big data, and the weight coefficient of each hazardous substance can be determined based on empirical data, which will not be described in detail here.

[0078] As an implementation mode of the present invention, the method for the early warning decision unit to formulate the escape buffer time is:

[0079] When it is judged to be a serious simulated accident, the escape buffer time t=0;

[0080] When it is judged as a general simulated accident, the distance L between the accident point and the escape exit and the layout complexity N of the laboratory location are obtained;

[0081] Then through the formula Calculate the escape buffer time t;

[0082] in, is the conversion coefficient, τ 1 and τ2 is the weight coefficient, L 0 is the control escape distance preset by the system, N 0 The comparison layout complexity preset for the system.

[0083] Through the above technical solution, this embodiment provides a method for the early warning decision unit to formulate an escape buffer time. When an accident occurs, the personnel in the laboratory need a certain amount of escape time, but this time is generally not available, so they can only escape in a hurry. However, since the escape time is unknown, it is easy to get confused when escaping. Therefore, when this embodiment determines that it is a serious simulated accident, the escape buffer time t=0, and it is considered that the accident is very serious and needs to be escaped immediately; when it is determined to be a general simulated accident, the distance L between the accident point and the escape exit and the layout complexity N of the laboratory location are obtained, and then the formula is used to calculate the escape buffer time t=0. Calculate the escape buffer time t. From the formula, it can be seen that when the severity of the accident is smaller, that is, Dd x The larger the -Dd value is, or the shorter the distance between the accident site and the escape exit, and the lower the layout complexity of the laboratory, the more escape buffer time is left. By estimating the escape buffer time according to the severity of the accident in a simulated environment, the escape buffer time can be determined by a comprehensive analysis based on the distance to the escape exit, the severity of the accident, and the complexity of the laboratory layout. By estimating the escape buffer time according to the severity of the accident in a simulated environment, it is convenient for personnel in the laboratory to have a clear understanding of the escape time when an actual accident occurs, so that personnel can promptly deal with the fire in a limited time, or arrange for personnel to evacuate in an orderly manner in a timely manner to reduce property or personnel losses.

[0084] In the above technical solution, the distance L between the accident point and the escape exit can be determined according to the laboratory area, the layout complexity of the laboratory location can be determined artificially according to the structure of the laboratory, and the weight coefficient τ 1 , τ 2 , Conversion factor And the system preset comparison escape distance L 0 , the system preset comparison layout complexity N 0 All of them can be formulated based on empirical data, so I will not go into details here.

[0085] As an embodiment of the present invention, the feedback guidance unit is also used to judge the operation standardization of the operator according to the operation behavior of the operator, and the judgment method is:

[0086] In a period ΔT, obtain the number of operating errors B and the duration Tm of each operation made by the operator in the period j ;

[0087] By formula Find the standard value K;

[0088] The obtained standard value K is compared with the standard threshold K preset by the system th Make a comparison;

[0089] When K>K th When the operator fails to operate in a standardized manner,

[0090] Where m is the total number of operation steps in the cycle, j∈[1,m], and ΔTm is the standard time duration for each operation step.

[0091] Through the above technical solution, this embodiment provides a method for the feedback guidance unit to judge the operator's operation standardization according to the operator's operation behavior. First, a period ΔT is manually determined. Within a period ΔT, the number of operation errors B made by the operator within the period and the duration Tm of each operation are obtained. j , through the formula Calculate the standard value K. From the formula, we can see that the more operating errors occur, or the greater the difference between the duration of each operation and the standard duration of each operation step, the greater the probability of operator error, and the less standardized the operator's operation. Therefore, the obtained standard value K is compared with the standard threshold K preset by the system. th Compare: When K>K th In this way, the operator's operation standardization can be judged in the simulation system based on the operator's operation time and operation errors. This can more clearly understand the quality of the operator's training, the operator's understanding of emergency training and mastery of safe operations, and facilitate subsequent management.

[0092] In the above technical solution, the standard time duration ΔTm of each operation step set by the system and the standard threshold value K preset by the system th This is obtained based on empirical data and will not be described in detail here.

[0093] The present invention simulates a visual environment simulation model consistent with the actual laboratory through VR technology, gives the operator a personal interactive experience through the human-computer interaction unit, and then judges whether the operation steps are correct according to the operation behavior of the operator. When incorrect, the feedback guidance unit performs immediate error correction guidance, thereby training the operator, which can increase the operation specifications of the operator and ensure safety. The present invention can judge whether a safety accident will occur according to the operation behavior of the operator. When it is judged that a safety accident will occur, a comprehensive analysis can be performed based on the risk value of the current step and the environmental impact value of the current laboratory to determine the severity of the accident, so that the operator has a deeper impression of his own operation behavior, thereby reducing the errors that occur during actual operation. The present invention can also formulate an escape buffer time according to the severity of the simulated accident through the early warning decision unit, so that when an actual accident occurs, the operator can roughly understand his escape time, thereby performing corresponding emergency treatment on the laboratory accident within the escape time to reduce property losses and casualties.

[0094] The above contents are merely examples and explanations of the concept of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the concept of the invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

Claims

1. A laboratory safety and emergency training system based on VR technology, characterized in that: The system comprises: A laboratory environment simulation unit, wherein the laboratory environment simulation unit is used to build a visual environment simulation model consistent with the actual laboratory according to the environment layout of the laboratory; A human-computer interaction unit, the human-computer interaction unit being connected to the laboratory environment simulation unit and used to simulate actual operations of an operator in a visual environment simulation model; A feedback guidance unit, which is used to record the operator's operation behavior in real time and provide immediate error correction guidance; An accident simulation unit, the accident simulation unit is used to determine whether to generate a simulated accident according to the operation behavior of the operator; An early warning decision unit, wherein the early warning decision unit sets an escape buffer time for the operator according to the generated simulated accident; The method for generating a simulated accident by the accident simulation unit is as follows: the feedback guidance unit is provided with a plurality of guidance steps, each guidance step being set with a corresponding risk level; When the operator's operation steps are inconsistent with the guidance steps, it is considered that the operator has made an operation error, and the risk level K under the operation step is obtained; The obtained risk level K is compared with the system preset risk level threshold K th 1. Compare: When K>K th 1, a simulated accident is generated; Otherwise, continue with the next step after providing error correction guidance; The simulated accidents are divided into general simulated accidents and severe simulated accidents. First, the severity of the accident Dd is obtained by the formula Dd=α1*R+α2*V; When Dd<Dd x It is judged as a general simulated accident; When Dd≥Dd x It is judged as a serious simulated accident; Among them, Dd x is the accident severity threshold preset by the system, R is the current step risk value, V is the current environmental impact value, α1 and α2 are proportional coefficients; The method for obtaining the step risk value R is: obtaining the step risk value R by the following formula; Among them, K th 2 is another risk level threshold preset by the system, and K th 1<K th 2; The method for obtaining the environmental impact value V is: obtaining the environmental impact value V by the following formula; Among them, S is the volume of the laboratory, n is the type of dangerous substances in the laboratory, E i is the hazard level of the i-th hazardous object, β i is the weight coefficient of the ith hazardous object, Q people is the number of people in the laboratory, Φ is the laboratory's containment coefficient, and i∈[1,n].

2. According to the laboratory safety and emergency training system based on VR technology in claim 1, it is characterized in that: The method for the early warning decision unit to formulate the escape buffer time is: When it is judged to be a serious simulated accident, the escape buffer time t=0; When it is judged as a general simulated accident, the distance L between the accident point and the escape exit and the layout complexity N of the laboratory location are obtained; Then through the formula Calculate the escape buffer time t; in, is the conversion coefficient, τ1 and τ2 are weight coefficients, L0 is the control escape distance preset by the system, and N0 is the control layout complexity preset by the system.

3. According to claim 2, a laboratory safety and emergency training system based on VR technology is characterized in that: The feedback guidance unit is also used to judge the operation standardization of the operator according to the operation behavior of the operator, and the judgment method is: In a period ΔT, obtain the number of operating errors B and the duration T of each operation made by the operator in the period mj ; By formula Find the standard value K; The obtained standard value K is compared with the standard threshold K preset by the system th Make a comparison; When K>K th When the operator fails to operate in a standardized manner, Where m is the total number of operation steps in the cycle, j∈[1,m], and ΔTm is the standard time duration for each operation step.

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