DD289593A5 - METHOD OF INTEGRATING DIFFERENT DIAGNOSTIC ALGORITHMS FOR NON-STATIONARY STATE TERMS - Google Patents

Abstract

The method of integrating different diagnostic algorithms for non-stationary state determination is applicable in automated machine and system monitoring. The aim of the invention is to realize, taking into account a minimum technical equipment expense of a maximum scope of specific diagnostic tasks on machinery and equipment to ultimately make the maintenance effort more effective. The object of the invention is to integrate different diagnostic algorithms in only a single method, without having to extend the technical equipment expense extensively, but to allow multiple applications and thus on the basis of existing circuit technology basic modules technical diagnostic procedures retrievable to realize. Two computers can be coupled together. According to the invention, the object is achieved by storing in the main computer A all diagnostic algorithms and output data required for a diagnostic task. By transferring the diagnostic algorithm relevant for the selected diagnostic task, at least of the component signal acquisition and the associated output data to the computer B, the latter is structurally structured in such a way that the corresponding signal paths are activated, ie. H. Modules of the computer B are reversibly coupled in each case circuit-wise reversed so that ultimately the specific program of the transferred diagnostic algorithm is completed. Fig. 1 {automated system monitoring; automated diagnostic system; Computer technology; Diagnostic algorithm; Inspection Technology; Integration; Diagnostics; Computer link; Computer network; Schaedigungszustand; Schaedigungsdiagnose; technical diagnosis}

Description

For this 1 page drawings

Field of application of the invention

The invention relates to a method for technical diagnostics on machines and plants. It is applicable for a comprehensive system diagnostics with a variety of measurement tasks, which allows a diagnosis on the object by means of mobile technology.

Characteristic of the known technical solutions

The basis of the condition-based maintenance of machines and plants is the exact knowledge of the damage condition. The information on the state of damage is obtained using methods of technical diagnostics. In addition to the methods of direct diagnostics, the methods of indirect diagnostics are increasingly being used, which include damage diagnosis during operation, ie. H. without disassembly. The devices and device configurations used for the diagnosis of damage to machinery and equipment are subdivided into the following main groups:

- simple inspection series

This group of devices includes stationary and mobile devices that enable monitoring of one or more diagnostic signals. The evaluation of the diagnostic information is mainly based on experiences that have been gained through many measurement evaluations.

As inspection equipment vibration monitoring, temperature measuring devices, vibration testers of various manufacturers are known.

- computer-aided measuring and evaluation equipment

The device group also includes stationary and mobile measuring technology, the use of which is provided both under laboratory and under operating conditions. The devices often contain elaborate Jigiialauswertefunktionen. The evaluation of the results is also based on experience gained.

There are e.g. Vibrationsmeßverfahren, materials testing based on ultrasound, etc., based on equipment by z. B. Real-time analyzers, FFt analyzers, signal analysis calculator, etc. are underdeveloped.

- Computer-aided measuring technology in combination with computer systems

The measuring technology within this device group is primarily intended for mobile use. The coupling with central computer systems is used for reading in and out of data, including the information collected with the measuring technique. At measuring and diagnostic technology diesor group are known:

- vibration diagnosis device M1302 from VEB Robotron measuring electronics with PC 1715 (DD-PS 208497);

- Bearing Analyzer BEA52 with MAC 10 from SPM-Instrument AB;

- Data-collector system of IRD;

- VibrocamSOOOderCarl-SchenkAG.

If the devices of the 3 main groups contain microcomputers, they are permanently programmed, due to the dominance of only one task.

The upstream peripheral signal detection circuits for converting the sensor output signal into a computer-compatible digital signal are also adapted to the specific task, here justified by achieving the highest possible accuracy, selectivity and avoiding circuit redundancy, which reduces the reliability.

Due to the multitude of recently developed component perfection diagnostic methods, a large range of equipment is required in large enterprises to enforce comprehensive system monitoring, both for obtaining and analyzing the diagnostic information. In addition to the high investment costs for the procurement of equipment technology, of course, there is also a high operating and maintenance costs. The different measuring and analysis methods make high demands on the qualification of the operating personnel, also because of the different equipment and operating philosophies, see

- Renkes, D .:

Changes in maintenance due to technical progress Machine damage 61 (1988), No. 2, pp. 63-68 Allianz-Versicherungs-AG Berlin and Munich and

- Collacot, R .: Mechanical Fault Diagnosis Chapman and Hall, London, 1977.

The intensive research in the field of technical diagnostics of machines and plants tend in recent times in the direction of the search for more effective measurement methods and the reduction of equipment costs.

New ways are required, cf. also

K.W.Bonfig

New ways of measuring data processing and registration

Measuring Testing Automation, 1988, H. 3, p. 65

Hans Holzmann Verlag.

Object of the invention

The aim of the invention is to realize, taking into account a minimum equipment expense, a maximum amount of specific diagnostic tasks on machinery and equipment to ultimately make the maintenance effort more effective.

Essence of the invention

The object of the invention is to integrate different diagnostic algorithms in only one method, without having to extend the equipment complexity extensively, but to allow multiple applications and thus based on a variety of existing circuit engineering basic building blocks technical diagnostic methods retrievable to realize. Two computers can be coupled together. According to the invention, the object is achieved in that all diagnostic algorithms and output parameters required for the diagnosis are stored in main computer A (FIG. 1). Characteristic of the diagnostic algorithms is that they are classified in

Signal acquisition algorithms processing algorithms and evaluation algorithms.

Diagnostic algorithms are separate technical procedures for determining the damage condition of machines and plants. These algorithms are circuit-bound and writable by specific circuitry.

A mobile diagnostic processor B (FIG. 1), consisting of an arrangement of initially inactive electronic circuits for signal acquisition, processing and movement 7, 8, 9 and one or more inputs for different sensors 1 to 6, is activated by the main computer A. Activation is by a control algorithm that is part of the signal acquisition algorithm.

By transferring the relevant for the selected diagnostic task diagnostic algorithm, at least the component signal acquisition and the associated output data to the computer B this circuit is structured so that the corresponding signal paths are activated, d. H. the modules of the computer B are coupled in each case significantly reversible circuit technology together so that ultimately the specific program of the transferred diagnostic algorithm is completed.

Thus, the computer coupling receives such an architecture, which is a circuit-based conversion of such diagnostic methods as

- Vibration measurement

a: Peak value of the vibration acceleration ä: RMS value of the vibration acceleration v: Peak value of the vibration velocity v: RMS value of the vibration velocity

- α, β, γ nuclear radiation measurement

- Impulse density of the sound emission

- Material testing

z. B. Crack test on ultrasound basis

- Measurement of electrical parameters, e.g. u voltage

κ conductivity

b: magnetic flux density

h: magnetic field strength

e: strength of the electric field

R, L, C: resistance, inductance, capacity

- Temperature measurement

- optical measurement

z. B. temperature distribution, gray scale distribution, spectral analysis

- binary information

and their combination allows each other.

In such cases, where the diagnostic algorithms are firmly programmed in both computers, there is a changed distribution of the procedure described so far in the form that the computer B contains at least the signal detection algorithm. In addition, in a task to be completed, a transfer of control commands to select the relevant Teilbzw. Diagnostic algorithm from the host A to the computer B make.

AusfOhrungsbelspiel Let there be a main computer A in which the following diagnostic algorithms and parameters have been agreed, as shown in FIG. 1:

- Vibration measurement (structure-borne noise) SM

ä (t): rms value of vibration acceleration at time t ä (t): peak value of vibration acceleration at time tv (t): rms value of vibration velocity at time tv (t): peak value of vibration velocity at time t K (t) factor after DD -PS 208497

- α, ß, Y core measurement

- Pulse density analysis of the sound emission

- Material testing, e.g. Crack test on ultrasound basis

- Measurement of electrical parameters u voltage

i electricity

κ conductivity

b magnetic flux density

h magnetic field strength

e strength of the electric field

R, L, C resistance, inductance, capacity

- Temperature measurement

- optical measurement

e.g. Temperature distribution, gray value distribution, spectralanylase

- binary information

and combinations with each other.

For this purpose, there exists a second computer B, which has a sensor input for sensors 1... 6 and is equipped with signal detection, processing and evaluation circuits 7. To gain parameters. Output data for the vibration measurement K (t) (cf. DD-PS 208497) are z. Eg ä (t = 0): Peak value of the vibration acceleration with initial state t = ä (t = 0): RMS value of the vibration acceleration with initial state t = MTM: Integration time constant FC: Filter code Location, Aggregate, Bearing

NTM and FC represent setting parameters for modules in computer B. With the data location, aggregate, bearing, the operator is guided to the corresponding measuring point.

The second computer B is initially inactive, d. h., it is not prepared for a diagnostic task, and corresponding internal circuit connections are not made.

If now a diagnostic task is to be completed, the first main computer A passes the second the corresponding diagnostic algorithm, at least the component of the signal acquisition and the associated output data. Thus, in the computer B, the corresponding switching connections are made, the corresponding circuits are activated, and the measurement and diagnosis program can be completed, as is customary with conventional measured value, data acquisition and diagnostic devices which have internal memory capabilities.

Claims (2)

1. Method of integrating different diagnostic algorithms for non-stationary state determination by coupling two computers for processing technical diagnostic tasks on machines and systems, wherein the main computer (A) has stored the output data required for the diagnosis including the diagnostic algorithm and as the main computer (A) the processor of the computer ( B), characterized in that the main computer (A) stores the output data for unterscniedliche measured variables and the software for calculating the respective diagnostic characteristics, the memory space of the computer (B) is dimensioned such that a diagnostic algorithm, but at least part of its signal acquisition algorithm including associated Output data and diagnostic data can be stored and direct switchable connections to the detectors (1) to (6) exist and triggering a start command to realize one of the diagnostic tasks of the significant Diag nosealgorithm, but at least the signal detection algorithm and the associated output data from the main computer (A) to the computer (B) are transmitted and activated by the control algorithm: signal paths within the computer (B), so that a circuit engineering architecture of the coupling of one of the detectors (1) to (6) takes place with signal acquisition, processing and evaluation modules (7), (8), (9) of the computer (B) and at the same time the signal acquisition, processing and evaluation modules (7), (8), (9) the computer B are circuitry reversibly coupled together so that ultimately the specific program of the transferred diagnostic algorithm is completed and obtained by means of this circuit, the diagnostic data and evaluated and transferred for storage on the main computer (A). 2. The method according to claim 1, characterized in that the diagnostic algorithm is divided between the two computers, that the computer (B) contains at least the signal detection algorithm and that in a to be realized diagnostic task from the main computer (A) to the computer (B) only control commands for Selection of the relevant part of the diagnostic algorithm and the associated output data are transferred and thus when using fixed computer calculator (B) works independently for measured value acquisition, processing and evaluation.