Correlation analysis recognition method of detection signal in closed spacing corrosion
A corrosion detection and correlation analysis technology, applied in the multidisciplinary application of embedded systems, pattern recognition, corrosion detection, cathodic protection, cathodic protection of buried pipelines, to achieve the effect of solving synchronization problems
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Embodiment 1
[0075] Example 1: CIPS-Logger, a densely spaced static data logger
[0076] The static data recorder is a special device used in closely spaced detection to record the change of cathodic protection current on the pipeline at a fixed position. The function of the instrument is to complete the collection of CIPS static detection data during the entire cathodic protection effect detection period under complex industrial and mining conditions, so as to realize the correction of earth current and stray current interference.
[0077] 1. Hardware implementation:
[0078] 80C52 single-chip microcomputer is used to form the system, and the main frequency is 12MHz;
[0079] External expansion of 32MB program / data memory;
[0080] System real-time clock chip DS1307, clock accuracy: monthly error <10 seconds;
[0081] 4 interrupt modes:
[0082] 0.45 seconds ON, 0.8 seconds OFF; 1.65 seconds ON, 0.9 seconds OFF; 3 seconds ON, 2 seconds OFF;
[0083] 4 seconds ON, 1 second OFF.
[00...
Embodiment 2
[0112] Embodiment 2: Close interval data DSP recorder
[0113] The data DSP recorder is a special device used in closely spaced detection to record the change of the cathodic protection current on the pipeline along the pipeline route.
[0114] 1. Hardware implementation:
[0115] Adopt IT TMS320-2812 DSP chip to form the system, the main frequency is 150MHz;
[0116] External expansion of 64MB program memory, 64MB data memory;
[0117] System real-time clock chip DS1307, clock accuracy: monthly error <10 seconds;
[0118] 16-bit A / D fast analog / digital conversion of cathodic protection potential;
[0119] 4 interrupt modes:
[0120] 0.45 seconds ON, 0.8 seconds OFF, 1.65 seconds ON, 0.9 seconds OFF, 3 seconds ON, 2 seconds OFF, 4 seconds ON, 1 second OFF. The signal resolution of tube-ground potential is 1mV.
[0121] 2. Implementation of the method:
[0122] 1) The standard waveform library stores 32 waveforms with 16-bit precision, 8 waveforms for each interrupt mode...
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