RU66073U1 - PORTABLE SOFTWARE DIAGNOSTIC COMPLEX "MEANDR-D" - Google Patents

Abstract

The complex is intended for the diagnosis and detection of malfunctions of electronic products (REI). The technical result of the invention is to reduce the overall dimensions of the complex without reducing its functionality. The technical result is achieved by constructing a complex of primary digital and analog elements and programmatically restructuring its electrical circuit using a laptop computer into virtual (time-varying) devices of various functional purpose for working in the modes: “Development of a diagnostic test”, “Diagnostics” and “Repair of electronic equipment ". 9 C.p.F., 6 ill.

Description

The invention relates to control and measuring equipment, specifically to software and diagnostic complexes that allow the development of control (diagnostic) tests, diagnose electronic products (REI) based on the developed tests and detect the location of faults in defective REI.

A well-known mobile diagnostic and diagnostic complex (RU 2288113 IPC: В60Р 3/14, 2006; No. 33066, class ВРР 3/14, 2003), in which automated workstations for monitoring and diagnostics of replaceable elements of radio electronic products (REI) is included control and measuring equipment with separate indicator devices, quickly reprogrammed for monitoring and diagnostics of a wide range of replaceable elements of serviced complex REI (REI groups). The specified equipment contains a control computer and a set of software and functionally complete hardware tools connected with it for performing the whole range of activities related to the development of control (diagnostic) tests, diagnostics and fault detection (rejection) of electronic products (REI) based on control tests, and detection of localization sites malfunctions in defective (rejected) REI, replacement of faulty elements and restoration of operability of REI.

A disadvantage of the known mobile diagnostic and program complex is the bulkiness of its equipment, due to functional isolation and duplication of its elements. The high cost and difficulty of its use for servicing stationary

REI due to overall limitations and, as a consequence, the need to disassemble the equipment of the diagnosed REI, carrying elements of the disassembled equipment into the cabin of the mobile complex for diagnostic work in order to assess their performance.

The objective of the invention is the creation of a portable diagnostic and diagnostic complex suitable for the development of control (diagnostic) tests, diagnostics and fault detection (rejection) of electronic information sources based on control tests, detection of locations of malfunctions in defective electronic information sources in the interest of replacing defective elements and restoring the operational efficiency of electronic information sources directly places of operation of the latter without calling repair crews with expensive mobile complexes.

The technical result of the invention, providing a solution to the problem, is to reduce the overall dimensions without reducing the functionality of the complex.

The solution of this problem and the achievement of the claimed technical result is ensured by the fact that the portable diagnostic and program complex, according to the invention, comprises a laptop computer such as a laptop and a portable diagnostic and diagnostic unit with an adapter for connecting the diagnostic object, interconnected via USB and / or RS-232 ports moreover, the program-diagnostic unit contains a multi-channel analog-to-digital converter, a multi-channel generator of analog signals, a multi-channel pulse generator no-code signals, a multi-channel logic analyzer and a multi-channel diagnostic module, made on integrated elements and with digital control.

Moreover, a multichannel analog-to-digital converter contains at least two analog-to-digital converters connected at the input to the probes, and at the output to a control computer. A multi-channel analog signal generator contains at least two digital-to-analog converters connected at the signal inputs to the control computer output, and at the outputs with portable generator probes. A multi-channel pulse-code signal generator contains at least sixteen converters of binary numbers to logical voltage levels, connected at the signal inputs to the output of the control computer, and at the output through a buffer amplifier with probes with microclips. A multichannel logic analyzer contains at least four eight-channel ports connected at the inputs with probes equipped with probes with microclips, and at the outputs with a control computer. The multichannel diagnostic module contains at least three reprogrammable microcomputers. Each reprogrammable microcomputer is based on the ATMega128 microcontroller (ATMEL) and contains a serial interface of a universal synchronous asynchronous transceiver (USAP), a central processor, a reprogrammable and random access memory, and an input-output controller for forty-five channels. All microcomputers are connected at the inputs through their USAP interface and the USB-2.0 (or RS-232) interface to the host computer, and at the outputs through their input-output controllers with the terminals of the external adapter, and through a protection circuit with a probe. The control computer and monitor are made in the form of a personal computer - a laptop, and the multi-channel analog-to-digital converter, multi-channel analog signal generator, multi-channel pulse-code signal generator, multi-channel logic analyzer and multi-channel diagnostic module - in the form

a separate portable unit, configured to connect to a laptop via USB or RS-232 ports. The adapter is made in the form of a multi-pin connector and a contact board with an external power source. The contact board contains primary and backup connectors, a removable jumper block, DC / DC converters, TTL / CMOS level coordinators (+5 V / + 9 V), TTL / ESL (+5 V / -1.7 V), as well as a contact matrix, the contacts of which are connected to the corresponding contacts of the adapter.

Implementation of the program and diagnostic complex in the form of a laptop computer type Laptop and a portable program and diagnostic unit with an adapter for connecting a diagnostic object, interconnected via USB and / or RS-232 ports, and the program and diagnostic unit contains a multi-channel analog-to-digital converter, multi-channel an analog signal generator, a multi-channel pulse-code signal generator, a multi-channel logic analyzer and a multi-channel diagnostic module, made on the integration ln elements and with digital control, allows to reduce the overall dimensions of the complex due to:

a) exclusion of duplicate elements:

- a single indicator device for displaying alphanumeric and graphic information (laptop computer monitor);

b) software and operational restructuring of the electrical circuit of the complex from primary (open-frame) integrated digital and analog elements into a specific virtual (time-varying) functional device or a combination of functional devices needed to create control tests, diagnose REI and search

fault locations without the use of bulky cases and functionally complete hardware units.

At the same time, it is possible to preserve the functionality of the complex, namely, to programmatically create the following devices:

- a synchronous logic analyzer of the test diagnostics unit for finding a faulty element using a probe;

- a two-channel digital oscilloscope with memory for viewing electrical signals at the control points of faulty and operational REI in steps or in one pass using the probe of the diagnostic module or its autonomous probes;

- a logic analyzer for receiving signals through 32 independent parallel channels with probes for diagnostics and troubleshooting of digital or digital-analog REI nodes;

- an arbitrary waveform generator for generating analog signals of a given shape when repairing analog or digital-analog REI units;

- a logical sequence generator for generating digital TTL level signals (+5 V) in the repair of pulse components of REI,

in modes:

- test development;

- diagnosis;

- repair.

In addition, the proposed complex allows, due to the possibility of connecting removable memory blocks to the ports of the Notebook and the corresponding software created by the authors, to convert the diagnostic tests of REI designed for other well-known

diagnostic complexes, and, thus, use the previously accumulated repair and diagnostic database.

Supply of a multichannel generator of analog signals with at least two digital-to-analog converters connected at the signal inputs to the output of the control computer and at the outputs with the probes of the generator, and a multichannel generator of pulse-code signals with at least sixteen converters of binary numbers to logical voltage levels connected by signal the inputs with the output of the control computer, the output through the buffer amplifier with probes with microclips allows you to pair with known and promising many contact REI for the diagnosis and detection of the latest fault in them places.

Providing a multichannel logic analyzer with at least four eight-channel ports, connecting them at the inputs with probes equipped with probes with microclips, and at the outputs through the control computer with the signal input of the monitor allows you to study digital electrical signals in the frequency range from fractions of Hz to 100 MHz for 32 two channels simultaneously. This, in turn, allows you to accelerate the detection of places of localization of REI malfunctions and, as a result, increase the performance of the proposed complex.

Supply of a multichannel diagnostic module with a microcomputer set based on ATMega128 microcontrollers (ATMEL), which are connected at the inputs via the USB interface and USB-2.0 (or RS-232) interface to the host computer, and at the outputs through input / output controllers with terminals of an external adapter and through a protection circuit with a probe with relatively small dimensions of the module allows:

- provide diagnostics and repair of REI by issuing test effects

and receiving responses on input / output channels in the frequency range from fractions of Hz to 1 MHz, registering them in memory, displaying them on a computer screen and comparing them with reference reactions;

- to study digital electrical signals of REI in the frequency range from fractions of Hz to 1 MHz on one channel with a synchronous logical (or signature) analyzer with the accumulation and display of results on several visual channels sequentially in time;

- further reduce the overall dimensions of the complex.

The implementation of the diagnostic module adapter in the form of a multi-pin connector and a contact board with an external power source, the contact board of which contains the main and redundant connectors, a block of removable jumpers, secondary DC-DC converters, TTL / CMOS level coordinators (+5 V and +9 V), TTL / ESL (+5 V and -1.7 V), as well as a contact matrix, the contacts of which are connected to the corresponding contacts of the adapter, allows you to pair the software and diagnostic complex with electronic boards of REI of Soviet and Russian production odv.

Figure 1 shows the appearance of a portable diagnostic-software complex based on a Laptop, figure 2 is its functional diagram, figure 3 is a functional diagram of a diagnostic module for 135 input / output channels, figure 4, 5, 6 is a form display of control and signal information on the monitor screen in the "Development of a diagnostic test", "Diagnostics" and "Repair" modes, respectively.

The diagnostic and diagnostic complex contains a monitor 1 (see figure 2), a control computer 2 with a manipulator 3 type "mouse" and a keyboard

4, as well as a multi-channel analog-to-digital converter 5, a multi-channel generator 6 of analog signals, a multi-channel generator 7 of pulse-code signals (logical sequences of pulses), a multi-channel logic analyzer 8 and a multi-channel diagnostic module 9, made with digital control and interconnected via a control Computer 2. Devices 5-9 are made in the form of separate removable modules, structurally integrated into a separate portable software and diagnostic unit 10. The host computer 2 before assigned to control the operation of a portable diagnostic and diagnostic complex, as well as to generate binary codes and process codes received from modules 5-9, in the modes: development of a diagnostic test, diagnosis and repair. It is equipped with the Windows XP operating system and has a processor such as Pentium-2 or higher with a frequency of at least 900 MHz; random access memory (RAM) with a memory capacity of at least 128 Kbytes, a storage device on a hard magnetic disk with a capacity of at least 60 GB, a DVD drive and removable media for control (diagnostic) tests: memory cards (Flashcard), removable magnetic disks and optical DVDs -discs, three USB 2.0 ports for connecting to external devices (3, 5-9) and one port for connecting to monitor 1. Monitor 1 is made with a liquid crystal screen with dimensions of at least 11 inches. The monitor 1, the computer 2, the manipulator 3 and the keyboard 4 are made in the form of a laptop computer 11 connected to the program-diagnostic unit 10 through two USB-2.0 ports. The multi-channel analog-to-digital converter 5 of block 10 contains at least two analog-to-digital converters connected at the input to the probe 12, and at the output, through the control computer 2 with the signal input of the monitor 1. The multi-channel generator 6 of analog signals contains no

less than two digital-to-analog converters connected at the signal inputs to the output of the control computer 2, and at the output to the probe 13. The multi-channel generator 7 of the pulse-code signals contains at least sixteen converters of binary numbers to logical voltage levels, connected at the signal inputs to the control output Computer 2, the output is through a buffer amplifier 14 with probes 15 with microclips. Multichannel logic analyzer 8 contains at least four eight-channel ports connected at the inputs to probes 16, equipped with probes 17 with microclips, and at the outputs through a control computer 2 with the signal input of monitor 1. Multichannel diagnostic module 9 of block 10 (see Fig. 3) contains a clock generator 18, a reset circuit 19, a microcircuit 20 of the USB-2.0 interface and / or a microcircuit 21 of the RS-232 interface, a protection circuit 22, at least three reprogrammable microcomputers 23-25. Each reprogrammable microcomputer 23-25 is made on the basis of the ATMega128 microcontroller (ATMEL) and contains a serial interface 23.1 of a universal synchronous-asynchronous transceiver (USAP), a central processor (CPU) 23.2 with reprogrammable (EPROM) and operational (RAM) memory devices and an input control controller 23.3 23.3 - output to forty-five channels. All microcomputers 23-25 are connected at the inputs through the microcircuit 20 of the USB-2.0 interface or the microcircuit 21 of the RS-232 interface with the host computer 2 of the personal computer 11, and the outputs through the I / O controllers 18.3 with the adapter terminals 26. The microcomputer 23 additionally has one contact which is connected through the protection circuit 22 to the probe 27. The adapter 26 is designed to connect to the object 28 diagnostics (REI) and is made in the form of a multi-pin connector and a circuit board with an external power source 29. The circuit board of the adapter 26 contains the main and

redundant connectors, removable jumper block, DC / DC converters, TTL / CMOS (+5 V / + 9 V), TTL / ESL (+5 V / -1.7 V) level coordinators, as well as a contact matrix whose contacts are connected with the corresponding contacts of the adapter 26. The design of the adapter 26 depends on the diagnosed REI and is developed specifically for each type of REI or for a group of types of REI.

Before starting the program diagnostic complex, the diagnosed electronic product (REI) 28 is connected to the adapter 26 through the corresponding connectors. The adapter 26 is connected to the diagnostic module 9 through a cable 30. The diagnosed REI 28 is supplied with a supply voltage from a constant voltage source 29 which is not stabilized through a secondary DC voltage converter installed on the adapter board 26. The operator of the diagnostic and diagnostic complex using computer controls 3-4 11 launches a test diagnostic program that controls the operation of the program diagnostic unit 10 in the modes “Development of a diagnostic test”, “Diagnostics” and “Remo” NT ”, and also calls the“ Digital Oscilloscope ”,“ Signal Generator ”,“ Logic Analyzer ”programs, which are used to search for faulty elements in the REI.

Consider the operation of the complex in these modes.

DEVELOPMENT OF DIAGNOSTIC TEST

In this mode, using the on-screen menu of the monitor 1 and the controls 3-4 computer 2 there are opportunities (figure 4):

- create a test on the monitor 1 of the computer 11 by drawing the logical levels of the signals on the contacts of the REI in the form of graphic diagrams;

- create a test on the monitor 1 of the computer 11 and at the same time issue signals to the REI 28 (interactive mode);

- automatically save the test in the test file;

- create technical description files, tables of levels and diagrams of signals, values of logical signatures at control points of the circuit;

- download and upload to the monitor screen 1 repair instructions.

DIAGNOSIS OF REI

In the "Diagnostics" mode (figure 5):

- test actions on REI 28 are recorded in the test file;

- if necessary, manual switching (for digital-analog and analog cells REI 28) on the screen of the monitor 1 of the computer 11 displays text and graphic instructions and messages;

- response signals REI 28 to the test effects (current reaction) are recorded in the RAM of the computer 11;

- at the end of the test run, an automatic comparison of the reference reaction file and the current reaction is performed. In the event of a discrepancy, the text message "Product rejects!" and the comparison results are displayed on the monitor screen 1.

REI REPAIR MODE

The mode is used to repair REI, not passed diagnostics (Fig.6).

In this mode:

- the test action on the REI 28 is issued cyclically - (dynamic diagnostic mode) and using the probes 12, 15, 17 and 27, a faulty REI 28 element is searched:

- by outputting logical diagrams of voltage - logical analysis;

- by calculating signatures and comparing their values with reference values - signature analysis;

- by outputting analog voltage plots - analog analysis (observation on an oscilloscope).

In this case, the test effect can be issued to the REI 28 through the input contacts of the adapter 26, as well as using the probe 13 of the analog signal generator at any point in the REI 28 circuit, and the output signals are read from the output contacts of the adapter 26 connector. The reaction can be taken using the probe 12 of any point of the REI circuit 28 and displayed on the monitor 1 of the computer 11 in the "Oscilloscope" mode. If a fault location is found, the test action can be issued using probes 15 connected by microclips to the signal inputs of a particular REI 28 chip, and the output signals are read from the output contacts of the studied REI 28 microcircuit using probes 17 fixed by microclips to the output contacts of the microcircuit. The reaction of the chip is processed by a logical analyzer 8, computer 2 and displayed on the monitor 1 of the computer 11 and is used to assess the health of a particular chip. When the second duplicating and obviously operational REI 28 is installed in the adapter 26, fixing the probes 15 of the generator 7 of the test signals to the same inputs of both REI 28, and the probes 17 of the analyzer 8 to the same outputs, you can use the comparison method to study the REI 28 circuit and determine the location of the defective output signal circuit element.

Consider the features of the functioning of the elements of the complex in these modes. At the time of turning on the power of the complex, the reset circuit 19 of the module 9 generates a reset pulse. This pulse is supplied to all microcomputers 23-25 and sets them to one initial state. The clock generator 18 generates a pulsed voltage (such as a meander) of a stabilized frequency of 20 MHz. This voltage is supplied to all microcomputers 23-25 and synchronizes all processes in these microcomputers. After setting the initial state of the complex, the operator selects from the computer memory 11 a diagnostic test developed earlier for this REI. Runs it to run in the "Diagnostics" mode. The computer 11 converts the test codes into control codes, which are transmitted via the USB-2.0 interface to the diagnostic module 9 via the USB-2.0 interface microcircuit 20 on the microcomputer 23-25. Each microcomputer 23-25 operates under the control of an internal program, which is preliminarily developed by the designer of this device and is recorded in the reprogrammable memory of the microcomputer 23-25. We consider the operation of microcomputers 23–25 using the example of the operation of microcomputers 25. Microcomputers 25 receive from the host computer 2 only “their own” control codes and accumulate them in their RAM. The Central processing unit (CPU) 23.2 microcomputer 25 decrypts the received codes and issues commands to its controller 23.3 I / O. The input / output controller 23.3 of the microcomputer 25, depending on the commands received from the CPU 23.2, controls the operation of the contacts of the microcomputer 25. The control process consists in the following: the contact configuration (input or output in this test cycle) is established; potential is set at the configured contact +5 V (logical 1) or +0 V (logical 0) in this test cycle. If the contact is the output of the microcomputer 25, take real

steady-state potential on the contact (whether it is an input or an output) in this test cycle and transfer it to RAM. The operation of the microcomputer 23 is slightly different from the operation of the microcomputer 24 and 25. Since the microcomputer 23 additionally has one contact, which is always configured as an input and which is connected through the protection circuit 22 to the probe 27. The input / output controller 18.3 of the microcomputer 23 reads the state of this contact in each cycle test and transfers to RAM. This ensures the operation of the program diagnostic module 9 in the "Synchronous logic analyzer" mode. The protection circuit 22 provides protection for the input of the microcomputer 23 from being hit by an increased voltage or shorting to ground when troubleshooting a probe 27 of the logic / signature analyzer.

After loading the diagnostic test into the microcomputer 23-25, its execution begins. The test execution process is divided into separate measures in time. In each cycle, the microcomputer 23-25 issues various voltage levels (Logical 1 and Logical 0) through its controllers 23.3 I / O and adapter 26 to the inputs of the diagnosed REI 28. And then, after a certain time delay, it reads the responses from the REI outputs in the RAM of the output controllers 23.3 of the microcomputer 23-25. The stream of downloaded data to each I / O controller 23.3 contains information about the logical voltage levels that must be supplied to each input of the REI 28, and about the logical levels of responses that must be established at each output of a working REI 28 (the so-called reference reactions). After reading the reactions, each microcomputer 23-25 begins to analyze the reaction for the presence of a short circuit or overvoltage at each input of the REI 28, and then to the coincidence of the reaction with the reference reactions at each output of the REI 28. Here it should be emphasized that, unlike the known software

diagnostic complexes, the analysis of the output reactions is performed in the microcomputer 23-25, and not in the computer 11. If the analysis shows a short circuit at any input of the REI 28, then the input / output controller 23.3 issues a command to put all of its output channels into a high-impedance state, stops further testing, gives a stop signal to other microcomputer input / output controllers 23.3 23-25 and transmits a message to computer 11. Computer 11, having received this message, displays a message on the monitor screen 1 to the operator: “CO DETECTED LIGHT CLOSE ON CONTACT ... IN TACT No. ... ". If during the analysis the output reactions do not coincide with the reference reactions, the input / output controller 23.3 of the corresponding microcomputer 23-25 generates information about the results of the analysis and places it in its RAM CPU 18.2 and then proceeds to the next test step. At the end of the diagnostic test, all detected discrepancies are transmitted via the USAP interface 23.1 and USB-2.0 interface chip 20 to computer 11. Computer 11 analyzes the reaction codes and compares them with the reference reactions stored in the reference memory files of the control computer 2 for this REI 28. If no discrepancies were found, the message “PRODUCT IS CORRECT” is issued. If, as a result of the analysis, discrepancies of the accepted reactions from the REI 28 with the reference ones are detected, then the computer 11 stops the diagnostic test run, displays a message on the monitor screen 1: “Product rejects” and provides data on which outputs of the REI 28 received the wrong reactions. If no mismatch is found, then the test passes to the end and the message “Product is OK” is displayed. This completes the diagnosis of REI 28. At the end of the diagnostic test run, computer 11 displays status information on the monitor screen 1

diagnosed by REI 28, i.e. This product 28 is working or not working, and according to which outputs an incorrect reaction has been detected. Further, to repair a faulty REI 28, it is necessary to determine its faulty element. To detect a faulty element of the REI circuit 28, the operator starts a diagnostic test in the "Repair" mode (Fig.6). In this mode, the test runs without stopping. If an incorrect reaction is detected at any output of the product, the test can also be "looped", i.e. repeat continuously. In the “Repair” mode, the operator can use the entire arsenal of measuring tools of the software and diagnostic complex by switching to the “Digital Oscilloscope”, “Signal Generator”, “Logical Analyzer” modes, which are used when searching for faulty elements in the REI 28. The probe 27 is used to find faulty nodes and elements inside the diagnosed REI 28 in the "Logical analyzer" mode. In the process of troubleshooting, the probe 27 is installed on the contacts of the individual elements of the REI 28, a diagnostic test is run, and the changes in the electrical signal at the selected point in the circuit are monitored on the monitor screen 1. The signal received by the probe 27 can be displayed on the monitor 1 in the window of the digital oscilloscope, in the window logic analyzer and in the signature analyzer window.

The invention is developed at the level of a prototype. Tests of the prototype showed the achievement of the claimed technical result and the solution of the problem of the invention.

Claims (9)

1. A portable diagnostic and diagnostic complex, characterized in that it contains a laptop computer such as a laptop and a portable diagnostic and diagnostic unit with an adapter for connecting a diagnostic object, interconnected via USB and / or RS-232 ports, and the diagnostic and diagnostic unit contains multi-channel analog-to-digital converter, multi-channel analog signal generator, multi-channel pulse-code signal generator, multi-channel logic analyzer and multi-channel diagnostic module made on integrated elements and with digital control. 2. The portable diagnostic and diagnostic complex according to claim 1, characterized in that the multi-channel analog-to-digital converter contains at least two analog-to-digital converters connected at the input to the analog signal probes, and at the output, through the control computer with the monitor signal input. 3. The portable diagnostic and diagnostic complex according to claim 1, characterized in that the multichannel generator of analog signals contains at least two digital-to-analog converters connected at the signal inputs to the output of the control computer, and at the output to the probes of the generator. 4. The portable diagnostic and diagnostic complex according to claim 1, characterized in that the multichannel pulse-code signal generator contains at least sixteen converters of binary numbers into logical signal levels, connected at the signal inputs to the output of the control computer, and the output through a buffer amplifier with probes with microclips. 5. The portable diagnostic and diagnostic complex according to claim 1, characterized in that the multichannel logic analyzer contains at least four eight-channel ports connected at the inputs to the probes equipped with probes with microclips, and at the outputs through the control computer with the signal input of the monitor. 6. The portable diagnostic and diagnostic complex according to claim 1, characterized in that the multichannel diagnostic module contains at least three reprogrammable microcomputers, each of which is based on an ATMega128 microcontroller (ATMEL) and contains a serial interface for a universal synchronous asynchronous transceiver (USAP), a central processor, reprogrammable and random access memory and an input / output controller on forty-five channels. 7. The portable diagnostic and diagnostic complex according to claim 6, characterized in that each reprogrammable microcomputer is connected via an input via its own USAP interface, a USB-2.0 (or RS-232) interface to a control computer, and, via outputs, through its input controllers / output with adapter terminals and through a protection circuit with a probe. 8. The portable diagnostic and diagnostic complex according to claim 7, characterized in that the adapter is made in the form of a multi-pin connector and a contact board with an external power source. 9. The portable diagnostic and diagnostic complex according to claim 8, characterized in that the adapter circuit board contains primary and backup connectors, a removable jumper block, DC / DC converters, TTL / CMOS (+5 V / + 9 V), TTL level coordinators / ESL (+5 V, / -9 V), as well as a contact matrix, the contacts of which are connected to the corresponding contacts of the main connectors.