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Fig. 6. Exemplary pressure sensor output signal (v,) and A/D-D/A converter output signal (2). Fig. 5. Pressure measurements during 24 kV tests.

Figure 6 Exemplary pressure sensor output signal (v,) and A/D-D/A converter output signal (2). Fig. 5. Pressure measurements during 24 kV tests.

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Pressure sensor basic parameters (provided by PCB Piezotronics Inc.).
Pressure sensor basic parameters (provided by PCB Piezotronics Inc.).
Fig. 2. Pressure sensors locations. and non-resonant response to rapid step of recorded quantity (pressure).
Fig. 2. Pressure sensors locations. and non-resonant response to rapid step of recorded quantity (pressure).
Fig. 3. Pressure sensor with tube placements: (a) at the extinguishing nozzle and (b) at the cylinder. To provide galvanic separation between the sensor and the signal recorders, insulated optical link with set of analog-—digital- analog converters have been utilized (Table 2).
Fig. 3. Pressure sensor with tube placements: (a) at the extinguishing nozzle and (b) at the cylinder. To provide galvanic separation between the sensor and the signal recorders, insulated optical link with set of analog-—digital- analog converters have been utilized (Table 2).
Fig. 4. Recorded gas in cylinder pressure for various tube length.
Fig. 4. Recorded gas in cylinder pressure for various tube length.
Fig. 7. A/D-D/A converter output signal frequency spectrum [15]. e Low-Pas filters application on the pressure sensor v and con- verters v, output signals,
Fig. 7. A/D-D/A converter output signal frequency spectrum [15]. e Low-Pas filters application on the pressure sensor v and con- verters v, output signals,
Fig. 8. Comparison of filtered sensor (v,) and A/D-D/C (v,) converter signals acc. F = f(—10 dB) filter application.
Fig. 8. Comparison of filtered sensor (v,) and A/D-D/C (v,) converter signals acc. F = f(—10 dB) filter application.
Fig. 10. Converter phase response characteristic.
Fig. 10. Converter phase response characteristic.
Fig. 12. D/A converter outline of several output signals and dispersion of pressure voltage signals. Fig. 11. Recalculated D/A output signal and original sensor voltage signal comparison (where: recalc. A/D-D/A conv. signal - pressure signal at the converter output after inverse transformation).
Fig. 12. D/A converter outline of several output signals and dispersion of pressure voltage signals. Fig. 11. Recalculated D/A output signal and original sensor voltage signal comparison (where: recalc. A/D-D/A conv. signal - pressure signal at the converter output after inverse transformation).
Spectral transmittance calculated and based on the selectec reference signal was utilized at the next step of data processing for each, recorded converter %, output signal, recalculation Fourier transformation (FFT) has been applied for sensor and converters selected reference signals frequency analysis and spec- tral transmittance calculation (1):
Spectral transmittance calculated and based on the selectec reference signal was utilized at the next step of data processing for each, recorded converter %, output signal, recalculation Fourier transformation (FFT) has been applied for sensor and converters selected reference signals frequency analysis and spec- tral transmittance calculation (1):
Fig. 13. Digital-Analog output signals to pressure signal calculation procedure diagram.
Fig. 13. Digital-Analog output signals to pressure signal calculation procedure diagram.
Fig. 14. D/A converter output signals with spreads recorded for 120 A phase load current at 12 kV.
Fig. 14. D/A converter output signals with spreads recorded for 120 A phase load current at 12 kV.
Fig. 15. Waveforms recorded for 120 A phase load current at 12 kV. oe RO Complete data processing procedure i is presented in Fig. 13. Finally, D/A converter output voltage signal was converted into pressure signal according to specification listed in Table 1.
Fig. 15. Waveforms recorded for 120 A phase load current at 12 kV. oe RO Complete data processing procedure i is presented in Fig. 13. Finally, D/A converter output voltage signal was converted into pressure signal according to specification listed in Table 1.
Fig. 16. D/A converter output signals with spreads recorded for 20A phase load current at 12 kV.
Fig. 16. D/A converter output signals with spreads recorded for 20A phase load current at 12 kV.
Fig. 17. Waveforms recorded for 20 A load current at 12 kV and forced air flow (where: power-electric arc power). a Pressure p values and arc parameters recorded for 20A and 120A of load currents, for engaged forced air flow are presents Table 3.
Fig. 17. Waveforms recorded for 20 A load current at 12 kV and forced air flow (where: power-electric arc power). a Pressure p values and arc parameters recorded for 20A and 120A of load currents, for engaged forced air flow are presents Table 3.
Fig. 19. Recorded pressure in chamber as function of arc energy.
Fig. 19. Recorded pressure in chamber as function of arc energy.
Fig. 18. Exemplary signals recorded for 20 A load currents at 12 kV (no forced air flow).
Fig. 18. Exemplary signals recorded for 20 A load currents at 12 kV (no forced air flow).
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