KR101435505B1 - system for Failure test - Google Patents

Abstract

FIELD OF THE INVENTION The present invention relates to a potential failure risk assessment system, and more particularly, to a system for identifying a failure mode that can occur in an electrical and / or electronic system and its effect, and preventing the product from being shipped.
For this purpose, in the potential failure risk assessment system including the user terminal of the present invention and a server providing a failure mode for a specific part requested by the user terminal, the server obtains information on a failure mode corresponding to the failure mode and the failure mode Wherein the failure mode is a state in which the failure state including break and short is formally classified and the failure mechanism causes a failure due to physical, chemical, or mechanical causes.

Description

{System for Failure test}

FIELD OF THE INVENTION The present invention relates to a potential failure risk assessment system, and more particularly, to a system for identifying a failure mode that can occur in an electrical and / or electronic system and its effect, and preventing the product from being shipped.

Traditional Failure Mode and Effects Analysis methods are determined by experts' brainstorming methods on the effects of potential failures. Therefore, the current risk of electrical / electronic system failure is highly volatile, depending on the capabilities of the expert group.

Korean Patent Laid-Open Publication No. 2008-0030480 (titled invention: database creation device and database utilization support device) discloses, for each case data of a plurality of case data on past trouble examples, information indicating the location (location) of the case data A case database creating means for creating a case database by registering a case name of the case database and a knowledge name which is a name for expressing the retrieval result in association with the conditional expression A knowledge database creating means for creating a knowledge database by repeating the process, input means for specifying the conditional expression, and display means for displaying the contents of the case database and the knowledge database. I am proposing.

Thus, it is general that the FMEA effect is negatively affected due to lack of accurate knowledge and experience on the failure mode selection and mechanism for the field failure of the conventional electric / electronic system.

The problem to be solved by the present invention is to propose a method of quantifying the potential failure evaluation of the fluctuable electric / electronic system according to the level of the expert group.

Another problem to be solved by the present invention is to maximize the effect of the existing FMEA to improve the durability and reliability of the electric / electronic system.

For this purpose, in the potential failure risk assessment system including the user terminal of the present invention and a server providing a failure mode for a specific part requested by the user terminal, the server obtains information on the failure mode corresponding to the failure mode and the failure mode Wherein the failure mode is a state in which the failure state including break and short is formally classified and the failure mechanism causes a failure due to physical, chemical, or mechanical causes.

For this purpose, in the potential failure risk assessment system including the user terminal of the present invention and a server providing a failure mode for a specific part requested by the user terminal, the server obtains information on a failure mode corresponding to the failure mode and the failure mode Storing the similarity degree with respect to the bank for different parts in each bank for the part, wherein the failure mode is a state in which the failure state including the break and short-circuit is formally classified, and the failure mechanism Is a structure that causes failure due to physical, chemical, or mechanical causes.

The potential failure risk assessment system and the risk assessment method according to the present invention can realize objectification and quantification of the potential failure risk evaluation of the electric / electronic system and the novice of the FMEA can realize the potential of the electric / electronic system through the failure mode / mechanism bank There is an advantage that it is easy and convenient to estimate the failure.

FIG. 1 is a conceptual diagram of a failure mode / mechanism bank according to an embodiment of the present invention.
2 is a flow chart illustrating a method for analyzing a failure mechanism in accordance with an embodiment of the present invention.
3 is a flowchart illustrating an operation performed between a server storing a failure mode / failure mechanism bank and a user terminal according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The foregoing and further aspects of the present invention will become more apparent from the following detailed description of preferred embodiments with reference to the accompanying drawings. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings.

FMEA is a technique for avoiding the cause of a fault in the part itself and is a technique for quantitatively managing the problems scattered in each part such as design, process, and quality assurance. And the present invention proposes a method for effectively performing the entire FMEA by utilizing a failure mode / mechanism bank.

FIG. 1 is a conceptual diagram of a failure mode / mechanism bank according to an embodiment of the present invention. Hereinafter, a conceptual diagram of a failure mode / mechanism bank according to an embodiment of the present invention will be described in detail with reference to FIG.

Referring to FIG. 1, the failure mode / mechanism bank shows possible failure causes for each failure mode.

Figure 1 is a table that includes fields of component function, potential failure mode, failure impact, importance, classification, failure mechanism, incidence, current design management, discovery rate, RPN, recommended corrective action, Respectively. Particularly, the potential failure modes include failure mode / mechanism banks, and store failure modes corresponding to failure modes.

A failure mode is a formal classification of a failure state including a break and a short circuit, and a failure mechanism is a structure or a process causing a failure due to physical, chemical, or mechanical causes.

1, the failure mode A corresponds to the failure mechanism a1, the failure mechanism a2 and the failure mechanism a3, and the failure mode B corresponds to the failure mechanism a2 and the failure mechanism a3. Of course, the failure mode / failure mechanism described above is determined through brainstorming of the expert group, and the determined contents are stored in the failure mode / failure mechanism bank as shown in FIG.

As such, the present invention stores the failure mode / failure mechanism in a bank form so that engineers at an industrial site can also utilize the stored failure mode / failure mechanism to increase the efficiency of the FMEA.

2 is a flow chart illustrating a method for analyzing a failure mechanism in accordance with an embodiment of the present invention. Hereinafter, a method for analyzing a failure mechanism according to an embodiment of the present invention will be described in detail with reference to FIG.

In step S200, a failure mode diagram is created in which the cause of an arbitrary analysis target failure mode is hierarchically displayed as a causal relationship between an item, a failure factor, and a failure mode.

And converts the failure mode diagram created in step S202 into structured knowledge.

In step S204, the converted structured knowledge is stored / accumulated in the storage device.

In step S206, the accumulated analysis knowledge is used to search for another analysis target failure mode, and a failure mode mechanism diagram for the searched analysis failure mode is automatically generated.

An item refers to a part or combination of parts associated with the cause mechanism of the failure mode.

3 is a flowchart illustrating an operation performed between a server storing a failure mode / failure mechanism bank and a user terminal according to an embodiment of the present invention. Hereinafter, an operation performed between a server storing a failure mode / failure mechanism bank and a user terminal according to an embodiment of the present invention will be described in detail with reference to FIG.

In step S300, the server stores the failure mode / failure mechanism bank shown in FIG. That is, as shown in FIG. 1, the failure mode / failure mechanism bank stores a corresponding failure mechanism for each failure mode.

In step S302, the user terminal requests a failure mechanism for the specific failure mode to the server.

In step S304, the server extracts a failure mode for the fixed mode requested by the user terminal using the stored failure mode / failure mechanism bank.

In step S306, the server transmits the extracted failure mechanism to the user terminal.

As described above, according to the present invention, the failure mode-specific failure mechanism can be stored in a separate server, so that the user can access the server anytime and anywhere and utilize the failure mode-specific failure mechanism information.

Further, the failure modes of the electric / electronic parts can be utilized in other fields as well. That is, the failure modes of the electric / electronic parts can be utilized in such fields as aircraft, ship, automobile and the like. Therefore, the possibility of utilization can be improved by storing the failure mode / failure mechanism bank for each field.

That is, if the specific failure mode is not stored in the failure mode / failure mechanism bank of the electrical / electronic part, it is possible to utilize the failure mode stored in the failure mode / failure mechanism bank of the automotive field in another field.

In this case, when a failure mode / failure mechanism bank is stored in a plurality of fields, it is preferable to utilize information stored in the failure mode / failure mechanism bank in the field closest to the field to be actually utilized.

For this purpose, when a plurality of failure mode / failure mechanism banks are stored, it is desirable to provide adjacent weights for each field. Table 1 below shows an example in which adjoining weights are assigned to each field.

Electric / electronic parts Aircraft Parts Ship Parts Automotive Parts Electric / electronic parts 0.5 0.4 0.6 Aircraft Parts 0.5 0.3 0.4 Ship Parts 0.4 0.3 0.5 Automotive Parts 0.5 0.4 0.5

According to Table 1, the adjacent weight of the electric / electronic part and the aircraft part is 0.5, the adjacent weight of the electric / electronic part and the ship part is 0.4, and the adjacent weight of the electric / electronic part and the car part is 0.6. Therefore, if a specific failure mode is not stored in the failure mode / failure mechanism bank for the electrical / electronic part, the corresponding failure mode stored in the failure mode / failure mechanism bank for the automotive part having relatively high proximity weights is utilized.

Table 1 shows adjacency weights for specific fields, but is not limited thereto. That is, neighboring weights can be assigned to specific fault modes in a specific field in addition to assigning adjacent weights to specific fields. That is, the two component sectors can be given the same adjacency weight regardless of the failure mode, or can be given different adjacency weights for each failure mode.

Thus, the present invention proposes to utilize a failure mode / failure mechanism bank for another part if the failure mode for that particular part is not stored in the failure mode / failure mechanism bank.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the scope of the present invention .

100: Fault mode / Fault mechanism Bank server
110: User terminal

Claims (7)

A potential failure risk assessment system comprising a user terminal and a server for providing a failure mode for a specific part requested by the user terminal,
The server comprises:
And a bank storing information on a failure mode and a failure mechanism corresponding to the failure mode,
The failure mode is a state in which failures including disconnection and short circuit are classified in a formal manner,
The failure mechanism is a structure that causes failure due to physical, chemical, or mechanical causes,
Wherein the server includes a bank for the specific part and a bank for an arbitrary part other than the specific part,
Storing relative proximity weights between the specific component and the optional component,
When the user terminal receives a request for a failure mode for a specific part, searches for the failure mode in a bank for the part,
If the failure mode is not searched in the bank for the part, the server searches for a part having a relatively high relative weight with the corresponding part, retrieves the failure mode from the bank for the searched part,
The bank may include at least one of the function of the part, the potential failure mode, the failure effect, the importance, the failure mechanism, the incidence, the current design management, the discovery rate, the RPN, the recommended corrective action, A potential failure risk assessment system characterized by storage.
delete delete delete The server according to claim 1,
When the user terminal receives a request for a failure mode for a specific part, searches for the failure mode in a bank for the part,
If the failure mode is not sought in the bank for the part, the failure mode is searched for in the bank for the part with a relatively high proximity weight to the part in question, or the neighboring weights are relatively And a bank having a high failure mode is searched for.
A potential failure risk assessment system comprising a user terminal and a server for providing a failure mode for a specific part requested by the user terminal,
The server comprises:
And a bank that stores information on a failure mode and a failure mechanism corresponding to the failure mode, and stores an adjacent weight between the specific part and an arbitrary part other than the specific part,
The failure mode is a state in which failures including disconnection and short circuit are classified in a formal manner,
The failure mechanism is a structure that causes failure due to physical, chemical, or mechanical causes,
When the user terminal receives a request for a failure mode for a specific part, searches for the failure mode in a bank for the part,
If the failure mode is not sought in the bank for the part, the failure mode is searched for in the bank for the part with a relatively high proximity weight to the part in question, or the neighboring weights are relatively A bank having a high failure mode is searched for,
The bank may include at least one of the function of the part, the potential failure mode, the failure effect, the importance, the failure mechanism, the incidence, the current design management, the discovery rate, the RPN, the recommended corrective action, A potential failure risk assessment system characterized by storage.
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