A FMEDA information visualization method and system based on DFMEA

Abstract

The present invention relates to a method and system for visualizing FMEDA information based on DFMEA. The method comprises: constructing a DFMEA product structure tree; adding function requirements and characteristic requirements to components corresponding to each node in the DFMEA product structure tree by calling a function library and a characteristic library to obtain a first product structure tree; adding failure modes corresponding to the function requirements and characteristic requirements of the components to components corresponding to each node in the first product structure tree by calling a failure library to obtain a second product structure tree; adding risk analysis and optimization analysis corresponding to each failure mode to the corresponding node in the second product structure tree to obtain a third product structure tree; creating a new FMEDA project; selecting the third product structure tree of a product to be designed by using a product ID in the FMEDA project; adding corresponding diagnostic measures to each failure mode in the third product structure tree of the product to be designed by calling a diagnostic measures library to obtain a fourth product structure tree.

Description

Technical Field

[0001] The present invention relates to the field of information visualization, and in particular to a FMEDA information visualization method and system based on DFMEA. Background Art

[0002] Currently, there is no dedicated implementation tool for failure modes, effects and their diagnostic analysis in the existing technology. The historical experience and historical data in the minds of technicians cannot be fully utilized, which affects the efficiency and quality of product design and production. Summary of the invention

[0003] The purpose of the present invention is to provide a FMEDA information visualization method and system based on DFMEA, so as to provide a more accurate basis for product design and production.

[0004] To achieve the above object, the present invention provides the following solutions:

[0005] A FMEDA information visualization method based on DFMEA, comprising:

[0006] Constructing a DFMEA product structure tree; the elements represented by the upper nodes of the DFMEA product structure tree include the elements represented by the corresponding lower nodes;

[0007] Adding function requirements and characteristic requirements to the components corresponding to each node in the DFMEA product structure tree by calling the function library and the characteristic library, thereby obtaining a first product structure tree; the function library is used to store the function requirements of each component, and the characteristic library is used to store the characteristic requirements of each component;

[0008] By calling the failure library, adding failure modes corresponding to the functional requirements and characteristic requirements of the components to the components corresponding to each node in the first product structure tree, a second product structure tree is obtained;

[0009] Adding the risk analysis and optimization analysis corresponding to each failure mode to the corresponding node in the second product structure tree to obtain a third product structure tree;

[0010] New FMEDA project;

[0011] Select the third product structure tree of the product to be designed by the product ID in the FMEDA project;

[0012] The fourth product structure tree is obtained by calling the diagnostic measure library to add corresponding diagnostic measures for each failure mode in the third product structure tree of the product to be designed.

[0013] Optionally, after adding a failure mode corresponding to the functional requirements and characteristic requirements of the component to the component corresponding to each node in the first product structure tree by calling the failure library and obtaining the second product structure tree, the method further includes:

[0014] A functional failure matrix is ​​constructed based on the hierarchical relationship of each component and the correlation between the functional failures of each component.

[0015] Optionally, constructing the DFMEA product structure tree specifically includes:

[0016] Build a product library;

[0017] The DFMEA product structure tree is constructed by calling the product library.

[0018] Optionally, in the DFMEA product structure tree, the elements of the lower-level nodes functionally support the elements of the corresponding upper-level nodes.

[0019] The present invention discloses a FMEDA information visualization system based on DFMEA, comprising:

[0020] A DFMEA product structure tree construction module is used to construct a DFMEA product structure tree; the elements represented by the upper nodes of the DFMEA product structure tree include the elements represented by the corresponding lower nodes;

[0021] A function requirement and characteristic requirement adding module, used for adding function requirements and characteristic requirements to the components corresponding to each node in the DFMEA product structure tree by calling the function library and the characteristic library to obtain the first product structure tree; the function library is used to store the function requirements of each component, and the characteristic library is used to store the characteristic requirements of each component;

[0022] A failure mode adding module, used to add a failure mode corresponding to the functional requirements and characteristic requirements of the component to the component corresponding to each node in the first product structure tree by calling the failure library, so as to obtain a second product structure tree;

[0023] A risk analysis and optimization analysis adding module, used to add the risk analysis and optimization analysis corresponding to each failure mode to the corresponding node in the second product structure tree to obtain a third product structure tree;

[0024] FMEDA project creation module, used to create a new FMEDA project;

[0025] A product structure tree selection module is used to select a third product structure tree of the product to be designed according to the product ID in the FMEDA project;

[0026] The diagnostic measure adding module is used to add corresponding diagnostic measures for each failure mode in the third product structure tree of the product to be designed by calling the diagnostic measure library to obtain a fourth product structure tree.

[0027] Optionally, the system further comprises:

[0028] The functional failure matrix building module is used to build a functional failure matrix according to the superior-subordinate relationship of each component and the correlation relationship between the functional failures of each component.

[0029] Optionally, the DFMEA product structure tree construction module specifically includes:

[0030] Product library building unit, used to build a product library;

[0031] The DFMEA product structure tree construction unit is used to construct the DFMEA product structure tree by calling the product library.

[0032] Optionally, in the DFMEA product structure tree, the elements of the lower-level nodes functionally support the elements of the corresponding upper-level nodes.

[0033] According to the specific embodiments provided by the present invention, the present invention discloses the following technical effects:

[0034] Based on the DFMEA product structure tree and the DFMEA structure tree, the present invention sequentially adds functional requirements, characteristic requirements, and failure modes to the components on each node, transfers the information of the DFMEA structure tree to the FMEDA project through the product ID, and adds diagnostic measures corresponding to each failure mode to the structure tree, so that the functional safety rating of the current product to be designed is more accurate and more reasonable. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0036] Figure 1 A schematic diagram of a FMEDA information visualization method based on DFMEA according to the present invention;

[0037] Figure 2 A schematic diagram of the relationship between the newly created FMEDA project and the DFMEA structure tree of the present invention;

[0038] Figure 3 A schematic diagram of a product structure tree according to an embodiment of the present invention;

[0039] Figure 4 The figure is a structural schematic diagram of an FMEDA information visualization system based on DFMEA of the present invention. DETAILED DESCRIPTION

[0040] 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.

[0041] The purpose of the present invention is to provide a FMEDA information visualization method and system based on DFMEA, so as to provide a more accurate basis for product design and production.

[0042] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0043] Figure 1 The present invention is a flow chart of a method for visualizing FMEDA (Failure Modes Effects and Diagnostic Analysis) information based on DFMEA (Design Failure Mode and Effects Analysis), such as Figure 1 As shown, a FMEDA information visualization method based on DFMEA includes:

[0044] Step 101: construct a DFMEA product structure tree; the components represented by the upper nodes of the DFMEA product structure tree include the components represented by the corresponding lower nodes.

[0045] Wherein, step 101 specifically includes:

[0046] Build a product library. The product library is used to store various products.

[0047] Construct the DFMEA product structure tree by calling the product library.

[0048] In the DFMEA product structure tree, the components of the lower-level nodes functionally support the components of the corresponding upper-level nodes.

[0049] After the user creates a new DFMEA project, according to the "Seven-step Method" of FMEA (Failure Mode and Effects Analysis), product design engineers can build a DFMEA product structure tree by calling the product library. Product design engineers can build a specific DFMEA product structure tree according to product function.

[0050] Step 102: Add function requirements and characteristic requirements to the components corresponding to each node in the DFMEA product structure tree by calling the function library and the characteristic library to obtain the first product structure tree; the function library is used to store the function requirements of each component, and the characteristic library is used to store the characteristic requirements of each component.

[0051] Among them, step 102 specifically includes: according to the requirements of the FMEA "seven-step method" methodology, by calling the function library to add functional requirements for the components corresponding to each node in the DFMEA product structure tree, by calling the characteristic library to add characteristic requirements for the components corresponding to each node in the DFMEA product structure tree, to obtain the first product structure tree.

[0052] Step 103: Add failure modes corresponding to the functional requirements and characteristic requirements of the components to the components corresponding to each node in the first product structure tree by calling the failure library, so as to obtain a second product structure tree.

[0053] Among them, step 103 specifically includes: continuing to follow the requirements of the FMEA "seven-step method" methodology, calling the failure library content on the existing functional requirements and characteristic requirements of the product node in the second product structure tree to identify the failure modes corresponding to the functional requirements and characteristic requirements.

[0054] After step 103, a DFMEA-based FMEDA information visualization method further includes:

[0055] A function failure matrix is ​​constructed based on the superior-subordinate relationship of each component and the correlation between the function failures of each component, specifically including: according to the principle of top-down transmission of product functions, the user determines from a technical professional perspective in the function failure matrix which subordinate product functions need to be supported to realize the current product function, which subordinate product function failures cause the current product function failure, and what other impacts the current product function failure will cause. For content with these correlations, the corresponding blank cells in the function failure matrix can be double-clicked to generate the correlation between function and failure.

[0056] Step 104: Add the risk analysis and optimization analysis corresponding to each failure mode to the corresponding node in the second product structure tree to obtain a third product structure tree.

[0057] Among them, step 104 specifically includes: continuing to complete the risk analysis and optimization analysis after the product function failure in accordance with the requirements of the FMEA "seven-step method" methodology, and finally outputting the FMEA result file content.

[0058] Step 105: Create a new FMEDA project.

[0059] Step 106: Select the third product structure tree of the product to be designed through the product ID in the FMEDA project.

[0060] Step 105 specifically includes selecting a DFMEA product (third product structure tree) by calling the product library, and at the same time, opening the FMEDA project by selecting the associated DFMEA project by calling the DFMEA library. When creating a new FMEDA project, select the DFMEA structure tree by product ID, such as Figure 2 As shown, Figure 2 The product ID is specifically the product number.

[0061] Step 107: Add corresponding diagnostic measures to each failure mode in the third product structure tree of the product to be designed by calling the diagnostic measure library to obtain a fourth product structure tree.

[0062] Taking the IC chip as an example, part of the product structure tree corresponding to the IC chip is as follows Figure 3 As shown, Figure 3 FM stands for failure mode and DS stands for diagnostic measure.

[0063] After step 107 is completed, the ASIL level, FIT value, failure mode type identification and detectability rate corresponding to the diagnostic measures taken for the current product to be designed are determined, PMHF (random hardware failure rate) and SPFM (single point failure metric) are calculated according to the calculation rules, and the FMEDA result file is finally output. The FMEDA result file includes the ASIL level, FIT value, failure mode type identification, detectability rate corresponding to the diagnostic measures taken, PMHF, SPFM and the corresponding content of the fourth product structure tree.

[0064] FMEA design is the basis of FMEDA analysis. The present invention accurately transmits the structure of the product DFMEA design and the identified functional failures to the FMEDA team through the product number, avoiding the omission of functional safety risks of the current product. At the same time, the accurate transmission of information can also make the functional safety rating of the current product more accurate and well-founded, and ultimately achieve the goal of preventing product risks from leaking out or measurable before they occur, avoiding the adverse effects of violations of discipline or affecting personal safety on the enterprise due to product functional safety issues.

[0065] Figure 4 FIG. 1 is a structural diagram of a FMEDA information visualization system based on DFMEA of the present invention, as shown in FIG. Figure 4 As shown, the present invention discloses a FMEDA information visualization system based on DFMEA, comprising:

[0066] The DFMEA product structure tree construction module 201 is used to construct the DFMEA product structure tree; the components represented by the upper nodes of the DFMEA product structure tree include the components represented by the corresponding lower nodes.

[0067] The function requirement and characteristic requirement adding module 202 is used to add function requirements and characteristic requirements to the components corresponding to each node in the DFMEA product structure tree by calling the function library and the characteristic library to obtain the first product structure tree; the function library is used to store the function requirements of each component, and the characteristic library is used to store the characteristic requirements of each component.

[0068] The failure mode adding module 203 is used to add failure modes corresponding to the functional requirements and characteristic requirements of the components to the components corresponding to each node in the first product structure tree by calling the failure library to obtain the second product structure tree.

[0069] The risk analysis and optimization analysis adding module 204 is used to add the risk analysis and optimization analysis corresponding to each failure mode to the corresponding node in the second product structure tree to obtain a third product structure tree.

[0070] The FMEDA project creation module 205 is used to create a new FMEDA project.

[0071] The product structure tree selection module 206 is used to select the third product structure tree of the product to be designed according to the product ID in the FMEDA project.

[0072] The diagnostic measure adding module 207 is used to add corresponding diagnostic measures for each failure mode in the third product structure tree of the product to be designed by calling the diagnostic measure library to obtain a fourth product structure tree.

[0073] A DFMEA-based FMEDA information visualization system also includes:

[0074] The functional failure matrix building module is used to build a functional failure matrix according to the superior-subordinate relationship of each component and the correlation relationship between the functional failures of each component.

[0075] DFMEA product structure tree construction module 201, specifically including:

[0076] Product library building unit, used to build product library.

[0077] The DFMEA product structure tree construction unit is used to construct the DFMEA product structure tree by calling the product library.

[0078] In the DFMEA product structure tree, the components of the lower-level nodes functionally support the components of the corresponding upper-level nodes.

[0079] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the system disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0080] The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A FMEDA information visualization method based on DFMEA, characterized in that: include: Constructing a DFMEA product structure tree; the elements represented by the upper nodes of the DFMEA product structure tree include the elements represented by the corresponding lower nodes; By calling the function library and the characteristic library, function requirements and characteristic requirements are added to the components corresponding to each node in the DFMEA product structure tree to obtain a first product structure tree; The function library is used to store the function requirements of each component, and the characteristic library is used to store the characteristic requirements of each component; By calling the failure library, adding failure modes corresponding to the functional requirements and characteristic requirements of the components to the components corresponding to each node in the first product structure tree, a second product structure tree is obtained; Adding the risk analysis and optimization analysis corresponding to each failure mode to the corresponding node in the second product structure tree to obtain a third product structure tree; New FMEDA project; Select the third product structure tree of the product to be designed by the product ID in the FMEDA project; By calling the diagnostic measure library, a corresponding diagnostic measure is added to each failure mode in the third product structure tree of the product to be designed, thereby obtaining a fourth product structure tree; After obtaining the fourth product structure tree, determine the ASIL level, FIT value, failure mode type and detectability rate corresponding to the diagnostic measures taken for the current product to be designed, calculate the random hardware failure rate and single-point failure metric according to the calculation rules of the random hardware failure rate and single-point failure metric, and finally output the FMEDA result file; the FMEDA result file includes the ASIL level, FIT value, failure mode type, detectability rate corresponding to the diagnostic measures taken, random hardware failure rate and single-point failure metric.

2. The FMEDA information visualization method based on DFMEA according to claim 1, characterized in that: After adding failure modes corresponding to the functional requirements and characteristic requirements of the components corresponding to each node in the first product structure tree to obtain the second product structure tree by calling the failure library, the method further includes: A functional failure matrix is ​​constructed based on the hierarchical relationship of each component and the correlation between the functional failures of each component.

3. The FMEDA information visualization method based on DFMEA according to claim 1, characterized in that: The construction of the DFMEA product structure tree specifically includes: Build a product library; The DFMEA product structure tree is constructed by calling the product library.

4. The FMEDA information visualization method based on DFMEA according to claim 1, characterized in that: In the DFMEA product structure tree, the components of the lower nodes functionally support the components of the corresponding upper nodes.

5. A FMEDA information visualization system based on DFMEA, characterized in that: include: A DFMEA product structure tree construction module is used to construct a DFMEA product structure tree; the elements represented by the upper nodes of the DFMEA product structure tree include the elements represented by the corresponding lower nodes; A function requirement and characteristic requirement adding module, used for adding function requirements and characteristic requirements to the components corresponding to each node in the DFMEA product structure tree by calling the function library and the characteristic library to obtain a first product structure tree; The function library is used to store the function requirements of each component, and the characteristic library is used to store the characteristic requirements of each component; A failure mode adding module, used to add a failure mode corresponding to the functional requirements and characteristic requirements of the component to the component corresponding to each node in the first product structure tree by calling the failure library, so as to obtain a second product structure tree; A risk analysis and optimization analysis adding module, used to add the risk analysis and optimization analysis corresponding to each failure mode to the corresponding node in the second product structure tree to obtain a third product structure tree; FMEDA project creation module, used to create a new FMEDA project; A product structure tree selection module is used to select a third product structure tree of the product to be designed according to the product ID in the FMEDA project; A diagnostic measure adding module, used to add corresponding diagnostic measures for each failure mode in the third product structure tree of the product to be designed by calling a diagnostic measure library to obtain a fourth product structure tree; After obtaining the fourth product structure tree, determine the ASIL level, FIT value, failure mode type identification, and detectability rate corresponding to the diagnostic measures taken of the current product to be designed, calculate the random hardware failure rate and single-point failure metric according to the calculation rules of the random hardware failure rate and single-point failure metric, and finally output the FMEDA result file; the FMEDA result file includes the ASIL level, FIT value, failure mode type identification, detectability rate corresponding to the diagnostic measures taken, random hardware failure rate, and single-point failure metric.

6. The FMEDA information visualization system based on DFMEA according to claim 5, characterized in that: The system further comprises: The functional failure matrix building module is used to build a functional failure matrix according to the superior-subordinate relationship of each component and the correlation relationship between the functional failures of each component.

7. The FMEDA information visualization system based on DFMEA according to claim 5, characterized in that: The DFMEA product structure tree construction module specifically includes: Product library building unit, used to build a product library; The DFMEA product structure tree construction unit is used to construct the DFMEA product structure tree by calling the product library.

8. The FMEDA information visualization system based on DFMEA according to claim 5, characterized in that: In the DFMEA product structure tree, the components of the lower nodes functionally support the components of the corresponding upper nodes.

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