PSI - Issue 5

Jaroslav Václavík et al. / Procedia Structural Integrity 5 (2017) 1349–1354 Jaroslav Václavík et al. / Structural Integrity Procedia 00 (2017) 000 – 000

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4

b

a

Fig. 3. Installation of telemetry system on turbine generator shaft (a) scheme; (b) real image.

b

a

Fig. 4. (a) free shaft with installed measuring system; (b) receiving and controlling unit installed in turbine room.

Shaft 350 Ω

350 Ω

SIGNAL AMPLIFIER SV FLEX

20 m

D/A

RECEIVING ANTENA

MEASURING UNIT

RECEIVING UNIT

INDUSTRIAL PC

350 Ω

350 Ω

LAN

LAN

Fig. 5. Scheme of used chain of the measuring system

3.2. Software solution

The evaluation of stored data is performed using software module, build in program Matlab. This process is started each day in the controlling computer in parallel with the raw data transferee and pre-processing. The main task of the software is the evaluation of basic statistics of the monitoring signal, which are the mean, maximum, minimum and effective values. These values are added to the diagnostic file.