Method to generate tests for control of operability and diagnostics of faulty equipment

FIELD: electricity.

SUBSTANCE: generation of control and diagnostic tests is carried out on the basis of mathematical models of control objects built on circuits of electric principal control objects, mathematical models of electric radio elements (ERE) and parameters of electric signals for passport modes of ERE operation, and generation of reference thermal portraits of radioelectronic equipment (REE) items - a control object - is carried out by means of synthesis on the basis of individual thermal portraits of ERE of appropriate types and a drawing of the control object overview.

EFFECT: provision of the possibility to generate diagnostic tests for thermal imaging diagnostics of radio-electronic equipment faults when there are no reference samples of REE available.

2 dwg

 

The technical solution relates to the field of technical diagnostics, in particular to automated health monitoring and fault diagnosis of electronic equipment (REE) and other complex equipment using automated testing and diagnostic facilities on the basis of computer technology and digital measuring equipment.

During the implementation of automated performance monitoring and fault diagnosis REA greater complexity amount of work on formation control and diagnostic tests. In order to reduce labor costs for preparation of the tests use different methods for automated formation diagnostic tests.

Known methods of forming the control and diagnostic tests for automated testing and diagnostic facilities, fault diagnosis controlled CEA, which is based on the comparison of the measured response signals at intermediate points REA with a reference signal response at the same points EN No. 2261471 C1 (G06F 11/22, G05B 23/00, publ. 27.09.2005,, bull. No. 27) for a known good REA. The disadvantage of this method is generated on the basis of diagnostic tests unsuitable for fault diagnosis of complex REA with high density mounting of elektror is elementov (REE) and inability to access the measuring probe control and diagnostic facilities to the test points of the electrical circuits REA.

This disadvantage is eliminated in the method of formation diagnostic tests that use digital infrared (thermal) image controlled REA. An example of such a method is a method on the application number 2009135652/09 from 25.09.2009 adopted for the nearest equivalent.

In the formation of diagnostic tests as criteria serviceable condition REA this method uses digital infrared (thermal) image serviceable condition reference (control) sample of this type CEA. Formed using thermal imaging (infrared) digital video camera thermal picture serviceable CEA will be entered into the computer memory control and diagnostics installation and is used during subsequent Troubleshooting specimens of this type CEA as a criterion of health. All deviations thermal portraits REE on the images of samples of this type CEA during the subsequent diagnosis of a reference image (thermal portrait) serviceable condition CEA allow you to precisely localize the defective places REE in the design of the CEA, and then to identify the types of defective REE for their subsequent replacement in the repair of REA.

The advantage of this method of formation tests (taken as a prototype of the claimed method) is that it provides for the formation and p is the following use of diagnostic tests to detect and identify faulty REE without contact with the conductive circuits CEA, and without breaking the waterproof coating of controlled samples REA. Formed by this method tests to diagnose faults REA with a high density of REE.

The disadvantage of this method the formation of the tests focused on the use in the control and diagnostic systems with thermal imaging method for the diagnosis of faults (in particular in installations according to the invention under the application №2009135652) is that it can only be used when there are known good (reference) sample REA.

In this regard, this method cannot be used to generate tests when performing development work on the stages of fabrication of prototypes REA, at the beginning of the development of mass production of new types of electronic equipment, with military repair of component parts of weapons systems and military equipment, and in other cases where, for various reasons, there are no known good (reference) samples of this type CEA (object control using the control-diagnostic) systems.

The purpose of the claimed technical solution is to eliminate the disadvantages of the known method, namely the possibility of the formation of the diagnostician is ical tests for thermal fault diagnosis REA in the absence of reference (known good) samples REA.

The claimed technical effect is achieved in that before forming the control and diagnostic tests according to the design documents define the list of radio electronic elements included in the CEA, subject to the control and diagnosis. Specimens REE include, in accordance with their normal modes of operation according to the passport data. Using digital thermal imaging camera and receive digital thermal portraits for the working conditions of each type REE used in the composition of the CEA (subject to subsequent fault diagnosis using the generated tests). Then for each included sample REE mimic his characteristic fault condition (for example, a short circuit of the transistor in the circuit, a collector-emitter voltage when the voltage or the violation of the integrity of this circuit and the like). Using digital thermal imaging cameras get digital imaging portraits for typical failure state of each type REE, members of the controlled REA. Retrieved digital heat portraits for healthy and typical failure state REE identify relevant codes containing the ID of the type REE and status type REE. Identified thermal digital portraits are entered into the computer memory control-Diagnostica the coy installation. Then in the computer memory diagnostic setup enter digital General view drawing designs REA containing positional image of each REE and designating types REE located in the respective positions of designs REA.

Images of each type of REE in digital design drawing REA placed in the computer memory of the control and diagnostic installation, replace the previously received thermal digital portraits serviceable condition REE of the appropriate type. Replacement constructive image REE in digital design drawing REA on the appropriate thermal portrait of this type REE produce based on a match of type ID REE on the corresponding position of General view drawing REA with the identification code of the type of REE, which was previously identified thermal picture of this type of REE. As a result of change in digital design drawing REA at each position will be placed digital thermal portraits REE and thus will be generated reference digital portrait design REA to a healthy state, which is then used when diagnosing faults. Can be similarly obtained thermal portraits REA for typical failure state REE in the respective positions of designs REA.

Thus, FD is the formation of the reference thermal portraits for serviceable condition CEA, and failed States - without using natural objects CEA, subject to fault diagnosis, i.e. achieves the stated technical effect.

In order to increase the reliability of the formation of the digital thermal portraits for healthy and typical failure state REE and subsequent Troubleshooting when creating the reference thermal portraits of specimen REA take measures to exclude the influence of external optical and thermal radiation on natural samples REE and the lens of the infrared camera used in the formation of a diagnostic test thermal digital portraits products REA.

In some cases, for individual REE in the scheme of items REA printed circuit Board is a kind of heat sink due to its structural features. In this regard, in such cases, to improve the reliability of forming a thermal digital portraits for healthy and typical failure state REE when creating heat portraits REE included in accordance with the published data REE placed on a breadboard protoboard.

The exclusion of the influence of external radiation provide appropriate screening zone shooting - for example, the use of removable shielding enclosures (tubes)that are installed wide party on the edges of the mounting surface model PE atoi Board with REE. The top (mouth) of the tube used for installing lens infrared camera (similar to the prototype method).

Subsequent use of the generated specified diagnostic tests as part of the diagnostic control units are similar to the tests on the basis of the reference thermal portraits by the way is the nearest equivalent.

This formation tests to monitor the health CEA also produced without the use of natural samples REA (for example, using mathematical models serviceable condition CEA or using a simulation model in accordance with the method of forming tests on patent RU No. 2261471 C1 (G06F 11/22, G05B 23/00, publ. 27.09.2005,, bull. No. 27).

Technical implementation of the claimed method of forming tests is illustrated in figure 1 and figure 2.

Figure 1 shows the structural diagram of the automated control and diagnostics installation (which are generated tests)connected to the sample REE appropriate type of product CEA according to design documentation.

Figure 2 explains the features of mutual arrangement of the mounting surface breadboard with REE and video cameras, as well as the principle of protection (shielding) from the side effects of radiation on the formation of the reference images in the h is REA.

The installation of figure 1 used to generate the control and diagnostic tests in the claimed method, similar in composition to the plants for control and diagnostic products CEA, which subsequently must be used in the generated tests, and includes:

- mock-up fee 1 installed REE appropriate type according to design documentation sample CEA, which formed the tests;

- set of 2 sources of input test signals (including power supply), the outputs are connected to REE on a breadboard 1;

- set of 3 meters electrical parameters of the response signals;

Computer 4 control and diagnostics installation code the output of which is connected to the control inputs of the 2 sources of input test signals, and inputs connected to the code outputs 3 meters electrical parameters of the response signals and to output a digital infrared camera 5;

- infrared digital video camera 5, mounted on a prototyping Board with REE 1 (see figure 2) with replaceable casing (tube) 6, which provides protection breadboard with REE 1 from exposure to external radiation, and provides a lens digital camera 5 at a distance "H" so that the mock-up fee 1 installed REE (integral scheme is AMI, transistors, resistors, diodes, etc.) completely was out in the field shooting "α" of a lens of the infrared camera 5.

Set of 2 sources and a set of 3 meters is required to simulate real mode REE in the scheme REA according to the passport data REE.

After installation preparation 1 with regard to 2 to work and connect each REE on a breadboard 1 according to the passport data REE receive the reference heat image (infrared) REE 1.

The photo identifies the type of REE and write to a database. The database is placed digital General view drawing REA (object control). At each position of the drawing REA depicted drawing REE, which is replaced by its thermal image from the database. As a result of sequence replace all images REE on digital drawing REA (object control) digital thermal portraits of these REE receive synthesized digital thermal reference thermal picture CEA (controlled object).

For each combination of input test signals using mathematical models REA define activated REE in the scheme REA, their position in the drawing to form the reference thermal portrait REA for each test input combinations.

Formation control and diagnostic tests savenamespace using the setup of figure 1 with regard to 2 produce cyclically. When this perform operations in the following order:

1) adding to the database computer 4 mathematical models REE REE (object control), mathematical model of the entire CEA and digital General view drawing REA containing positional image of each REE and designation, which identifies the type of REE, which is in the corresponding position design digital drawing REA;

2) on the basis of mathematical models REA (object control) in the mathematical models REE and parameters for REE according to the passport data are simulated parameters of the input test signal from source 2, are determined by the parameters of the reference output signal response CEA as a whole and identifies the position of the activated REE for each test combination;

3) healthy samples REE of each type included in CEA (controlled object), set on the mounting (model) cost including according to the passport data, served on REE from 2 sources necessary signals (according to the standard work of REE in the composition of the CEA) and the previously discussed method are the reference thermal portraits for each characteristic condition REE;

4) the reference digital thermal portraits REE entered in the database of the computer installation;

5) display on the computer monitor installation digital drawing REA (pre centuries the profile found in the database);

6) for each position of the REE in the image of General view drawing REA (displayed on screen) based on the identifying data type REE retrieve from the database the heat portraits of this REE and replace these thermal portraits design image REE for this position drawing REA;

7) repeat positions 5 and 6 to replace all design images REE on their thermal portraits (up to the last position on the drawing REA);

8) put the generated reference digital thermal portrait REA for each combination of input tests in the computer memory;

9) continue steps 6, 7 and 8 to iterate through all combinations of input control tests, after which diagnostic tests will be fully formed and suitable for fault diagnosis of natural samples REA (similar to the way - the nearest equivalent).

Formed declared by way of the control and diagnostic tests are used as follows.

Collect diagnostic installation comprising, similar to figure 1 and figure 2, only the quality of the product 1 using in-situ sample of the CEA, subject to the control and diagnosis.

With the help of sources of input signals 2 to the inputs of the product REA 1 serves a combination of input test signals with parameters obtained previously on the results of the formation of the control boards for the s on the basis of mathematical modeling scheme REA. With the help of 3 meters measure the parameters of the response signals from the outputs REA 1 and compare them (using software in the computer 4) with reference parameters of the response signals (obtained when forming the control tests using a mathematical model schema REA). In case of coincidence of the measured parameters of the response signals products REA 1 with the reference parameters (from the database of the computer 4) product REA 1 qualify as healthy. In case of discrepancy of at least one of the response signals with the reference signal product REA 1 qualify as defective and proceed to Troubleshooting.

When diagnosing faults (as with tests generated by the method closest analogue) is served from 2 sources for the product REA 1 the combination of input test signals, which control the detected fault. Using a digital infrared camera 5 receive thermal picture of the defective condition of the product CEA 1. The resulting thermal portrait (visually on the monitor and using digital image processing) is compared with the reference digital portrait products REA 1 for the same combination of input test signals.

As a result of comparison reveals the position of the REE in the composition is measured using an infrared camera 5 Joe is on portrait REA, in which thermal picture REE does not match with the reference image. These REE and are defective.

Formed declared by way of the control and diagnostic tests provide the same completeness and reliability performance monitoring and fault diagnosis REE in the composition of the CEA, as the tests generated by the method is the nearest equivalent.

So, we have proved the realization of the stated technical effect, namely the formation of the control and diagnostic tests for Troubleshooting REA based on the reference heat portraits obtained by the method of synthesis of heat portraits of individual REE (without the use of natural samples of known good REA - control objects).

Thanks to the claimed method significantly reduces the cost of works on development of diagnostic tests. Heat portraits REE are generated and written to the database once and used repeatedly for all types of electronic equipment, which used data types REE.

Another positive result is the extension of the scope of the control and diagnostic facilities and diagnostic methods that were previously unavailable in groups of tests by a known method (in the early stages of design when testing prototypes REA, during the development of the production of the new types of electronic equipment, with military repair REA included military equipment and other).

Technical implementation of the installation of figure 1 and figure 2, is used to generate tests according to the claimed method, is provided with the use of standard commercially available technical means known from the prior art and similar tools used in the implementation of the prototype method. For the formation of the tests used to install the same composition as and for subsequent monitoring and diagnostic samples of the product CEA using tests formed the claimed method (and of the same composition as for the implementation of this method).

As a breadboard mounting plate used made of the same material as the REA - control object (e.g., foil fiberglass laminate). To obtain the reference thermal portraits REE are used in a known good REE types that are specified in the specification CEA - controlled object.

As sources 2 test input electrical signals can be used for software-controlled power supplies, generators parallel code combinations of signals, software-controlled pulse generators, signal generators, special forms, programmable generators of high-frequency signals and other program-driven app is ture, known from the prior art (similar to that used when implementing the method - the closest equivalent) and provide simulated input signals in accordance with the technical requirements for this type of REE controlled products 1.

As a measure of the 3 parameters of the response signals from outputs of REE 1 (depending on the type of the controlled products CEA) can be used known from the prior art logic analyzers, digital oscilloscopes, spectrum analyzers and other measurement devices (similar to those used for these purposes when implementing the method - the closest analogue and satisfying for metrological and operational characteristics of the technical requirements for this type of test object).

As the computer 4 as part of the device, figure 1, can be used with standard personal computers, equipped with the necessary interfaces to connect 2 sources of input test signals, measures 3 parameters of the response signals and the infrared camera 5 with the necessary speed and memory.

As a digital infrared camera 5 can be used samples of the serial digital video cameras infrared range, similar to that used in the composition of industrial cameras and other devices is Istv similar purpose with resolution providing reliable images (thermal portraits) smallest size of REE (resistors, transistors, diodes, integrated circuits) on the distance "H" from the surface of the breadboard with REE 1 according to figure 2. The minimum value of the distance H must be chosen such that the smallest lateral dimension of REE on the surface of the product corresponded to several gradations resolution infrared cameras, i.e. would provide reliable surveillance REE minimum size.

The casing (tube) 6 for placing a digital camera 5 can be performed in the simplest case of cutting sheet metal with the formation of structure in the form of a hollow pyramid (see figure 2) with the placement of the lens of the infrared camera 5 in the top of the tube 6, as shown in figure 2. The lower the size of the tube 6 should be such that it covers the entire surface of the test object 1 located here REE.

As an infrared camera 5 can be used in serial digital infrared cameras, with the necessary sensitivity, resolution and having the interface for connection to PC 4. Examples of such infrared cameras can serve, in particular, an infrared camera VOCORDNetCam L-series and N (provider in Russia: ZAO "VOCORD Telecom"), infrared VI is neocamera Vista Micro-NIR (provider in Russia: OOO "SEDATE") and others, with the resolution of no less than 1280×1024 pixels (which allows you to receive digital thermal portraits sufficiently small REE).

The principle of obtaining infrared images (thermal portraits) products known from the prior art and widely used for thermal imaging cameras for different purposes (see, for example, "non-Destructive testing and diagnostics". Reference: Ed. by V.V. Klyuev - M.: Mashinostroenie, 2005, str...543).

Thus, the claimed method of forming a test provides obtaining specified earlier, the technical effect is to eliminate the disadvantages of the known method and is implemented based on the model of technical means known from the prior art.

The method of formation diagnostic tests for performance monitoring and fault diagnosis of electronic equipment (REE) using control and diagnostic facilities, including the formation of combinations of input electrical test signals and parameters of the reference signal response on input combinations of the test signals, as well as the formation of the reference thermal portraits healthy state of the control object for each combination of input test signals, wherein the formation test is done with the use of a mathematical model of the control object, is held on the basis of the electric circuit of the control object, mathematical models of radio electronic elements (REE) and parameters of electrical signals for passport modes REE by simulating the parameters of the input test signals and determining the parameters of the reference output signal response CEA as a whole and determine the position of the activated REE for each test combination and formation of the reference thermal portraits products REA - control object produced by the synthesis of heat portraits REE appropriate types by placing them in the digital image of the drawing REA at appropriate positions, to obtain thermal digital images REE intact samples REE alternately placed on the mock-up fee, include, in accordance with their passport data, using digital infrared cameras receive digital thermal images of each REE, put the received reference thermal portraits in the database computer facility used to generate tests, and then use the obtained thermal portraits REE to generate the reference digital thermal portraits of CEA on the basis of the stored digital design General view drawing REA - object control.



 

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