RU171391U1 - DEVICE FOR PERIODIC DIAGNOSTICS - Google Patents

Abstract

The utility model relates to automated monitoring and diagnostics of electronic equipment (CEA) of complex objects, which include interchangeable functional modules and nodes. The technical result is to increase the reliability of control of analog and pulse circuits. The task is to provide higher accuracy of fault diagnosis by identifying defects to a specific failed active element. The problem is solved due to the fact that the device contains a control computer connected It is connected by a two-way communication with the diagnostic object, and through the second serial interface with the interface unit, while the interface unit is connected with the output to the diagnosis object. The device additionally contains a probe, including a voltage divider connected by its input to the diagnostic object, and by its output - a matching unit connected to an analog-to-digital converter, connected by its output to a microcontroller of logical signature analysis and generation of digital waveforms, outputs connected to control status indicators points and voltage divider, and the input - with the button for fixing the state of the control point, and through the first serial interface microcontrol p is connected to the control computer.

Description

The utility model relates to automated monitoring and diagnostics of electronic equipment (REA) of complex objects, which include interchangeable functional modules and nodes.

Known devices for automated control of electronic equipment used to control the quality of electronic equipment on the basis of "good-bad."

Known devices for the automated control of electronic products (USSR author's certificate No. 1383306, patent for the invention No. 2106677, patent RU No. 2150730, patent No. 2157559) containing sources of stimulating effects (test signals), devices for monitoring response signals (meters of output parameters) and a computer. A disadvantage of the known monitoring devices is their difficult implementation with limited functionality to perform troubleshooting to the level of defective elements.

The closest analogue is the patent for invention No. 2257604 "Automated monitoring and diagnostics complex", which includes a control computer connected via a first serial interface to an interface unit, which is connected to a diagnostic object via a second serial interface, while the interface control unit output is connected to a control input object of diagnosis.

The disadvantages of this device are the redundancy of the structure and the difficulty of monitoring the replaceable functional units of electronic equipment, the lack of the ability to accurately diagnose the failure of replaceable functional units, the lack of reliability of the control of analog and pulse circuits.

EFFECT: increased reliability of control of analog and pulse circuits.

The task is to provide higher accuracy in diagnosing malfunctions by identifying defects to a specific failed active element.

The problem is solved due to the fact that the device contains a control computer connected by two-way communication with the diagnostic object, and through the second serial interface with the interface unit, while the interface unit is connected with the output to the diagnosis object. The device additionally contains a probe, including a voltage divider connected by its input to the diagnostic object, and by its output - a matching unit connected to an analog-to-digital converter, connected by its output to a microcontroller of logical signature analysis and generation of digital waveforms, outputs connected to control status indicators points and voltage divider, and the input - with the button for fixing the state of the control point, and through the first serial interface microcontrol p is connected to the control computer.

In FIG. 1 shows the structure of the device element-wise diagnosis (SPD), where:

1 - the case of the device of element-wise diagnosis;

2 - control computer;

3 - second serial interface;

4 - interface unit;

5 - object of diagnosis;

6 - probe;

7 - voltage divider;

8 - matching unit;

9 - analog-to-digital Converter (ADC);

10 - microcontroller of the logical signature analysis and the formation of digital waveforms;

11 - button for fixing the state of the "control point";

12 - LED indicator of the status of the "control point";

13 is a first serial interface.

The element-wise diagnostic device comprises a control computer 2 located in the housing 1, a first serial interface 13, a second serial interface 3, an interface unit 4, a probe 6, a voltage divider 7, a matching unit 8, an analog-to-digital converter 9, a microcontroller 10, a latch button 11, indicators 12.

The control computer 2 is designed to control the dynamic mode of stimulating tests, implements a comparison of signatures at “control points” with reference signatures, and ensures the advancement of troubleshooting.

The control computer 2 is connected by two-way communication with the diagnostic object 5, and through the second serial interface 3 with the interface unit 4, while the interface unit 4 is connected with its output to the diagnostic object 5, and the diagnostic object 5 is connected to the voltage divider 7 through the first serial the interface 13 of the control computer 2 is connected to the microcontroller 10.

The probe 6 is designed to pick up electrical signals at the “test point” and is made in the form of a board (not shown) with electronic elements enclosed in a metal case (not shown). A button 11 and an LED indicator 12 are displayed on the housing of the device 1.

The probe 6 contains a voltage divider 7, connected by its output to the matching unit 8, connected to an analog-to-digital converter 9, connected by its output to the microcontroller of the logical signature analysis and generation of digital waveforms 10, the outputs connected to the LED status indicator of the control point 12 and voltage divider 7 , and the input - with the button for fixing the state of the control point 11.

The interface unit 4 is designed to decode the commands issued from the control computer 2 via the second serial interface 3, transfer them to the diagnostic object 5 and is made in the form of a board with electronic elements.

The voltage divider 7 is designed to limit the voltage level of the diagnostic object 5 and bring it to the electric range of digital logic levels, made in the form of two series-connected resistors (not shown).

The coordination unit 8 serves to coordinate the wave resistance, galvanic isolation and amplification of electrical signals from the diagnostic object 5, contains terminating resistors, a linear optocoupler of light galvanic isolation and an operational amplifier microcircuit.

An analog-to-digital converter 9 is designed to convert an analog electrical signal into a digital code and is made in the form of a microcircuit that provides an output sequence of 12-bit digital codes for further processing of the signal read from the “control point”.

The microcontroller 10 provides a logical signature analysis of a sequence of 12-bit codes, generates digital waveforms and is made in the form of a compact chip controlled by software.

Button 11 is used to fix the state of the "control point".

LED indicator 12 is used to display the status of the "control point". The device operates as follows:

After turning on the element-by-bit diagnosis device, the software is automatically launched on the control computer 1. The control computer 1 performs a functional check and initialization of all components, and establishes a connection with the probe 6 via the first serial interface 13, waiting for the diagnosis command.

Upon receipt of a command to start the diagnosis, the probe 6 is connected to the object of diagnosis 5. The device of element-by-element diagnosis is activated. The probe 6 of the device is installed in the “control point” to ensure reliable contact (a sewing needle is inserted into the probe that can pierce the varnish layer in the circuit board of the diagnostic object). The element-wise diagnosis device offers the first “reference point” for diagnosis. The control computer 2 launches a stimulating test, and troubleshooting begins at the control points. The signals read and processed by the probe 6 through the second serial interface 3 are sent for comparison with the standards to the control computer 2, which offers the following “control point” for diagnosis.

The LED indicator lights up in green if the read signal matches the reference, or lights up in red if the read signal does not match the reference.

After a steady display of any of the colors of the LED indicator, press the button to fix the state of the "control point". If the color is “green” (the signal of the “control point” coincides with the “reference” one), then the element-by-stage diagnosis device will select the first branch of the graph from the troubleshooting file and the diagnosis process continues along the first branch, since the comparison is “true”.

If the “red color” is detected (the signal of the “control point” did not coincide with the “reference” one), then the element-by-bit diagnostics device will select the second branch of the graph from the troubleshooting file and the diagnosis process continues along the second branch, since the comparison is “false”.

When the device selects a new “control point”, the diagnostic process is repeated to the end vertex of the graph, in which, according to the troubleshooting file, the required defect of components and their connections or recommendations for localizing this defect are indicated.

For each diagnostic object, software files for the element-by-stage troubleshooting diagnostics are required.

The reference signals of each "control point" are preliminarily read by the device of elementwise diagnosis from the debugged object of diagnosis.

The troubleshooting file is developed autonomously and is a programmed “graph”, the vertices of which determine the process of reading the signal at the “control point” and the two branches of the graph emerging from the top determine the diagnostic path by comparing the read signal value at the “control point” with the “reference” ". The diagnostic process continues along the first branch if the comparison is “true”, or along the second branch if the comparison is “false”. Thus, the next “control point” of the diagnosed object is determined before troubleshooting. The element-by-element diagnosis device operates in the following modes:

The development mode of the test file from the diagnostic algorithm - the "troubleshooting tree" with localized "control points".

The mode of removal of reference signatures using the probe in the "control points" of the "troubleshooting tree".

Diagnostic mode of the module of electronic equipment by comparing the signal at the “control point” with the reference signature and providing the possibility of troubleshooting to the level of defects in components and their connections.

Diagnostic mode of the module of electronic equipment by means of engineering analysis of the signal at a control point with various forms of representation (logical level, average voltage, waveform, signal temporal characteristics - frequency and period, calculated instability values).

Thus, the introduction of a probe into the device of element-by-unit diagnostics made it possible to create, on the basis of the declared SPD, compact automated workstations for monitoring and repair of replaceable functional modules and components of electronic equipment with the depth of defects detected to a specific failed active element.

The element-by-element diagnosis device is used to diagnose and repair complex objects in the manufacturing and operation process.

Claims (1)

A bit-wise diagnostic device comprising a control computer 2 configured to connect by a two-way communication with a diagnostic object 5, and through a second serial interface 3 with an interface unit 4, while the interface unit 4 is configured to connect its output to the diagnosis object 5, characterized in which additionally contains a probe element-by-unit diagnosis 6 including a voltage divider 7, configured to connect its input to the object of diagnosis 5, and by its output with a matching unit 8 connected to an analog-to-digital converter 9, connected by its output to a microcontroller of logical signature analysis and generation of digital waveforms 10, outputs connected to an LED status indicator of the control point 12 and voltage divider 7, and the input with a button for fixing the state of the control point 11, and through the first serial interface 13, the microcontroller 10 is connected to the control computer 2.

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