Research Article

Machine Vision Based Automatic Detection Method of Indicating Values of a Pointer Gauge

Table 2

The standard gauge detection results.

The pressure of checkpoint (MPa)The indicating value of standard gauge The cited error (absolute error/range)
Positive stroke Error 1 (visual detection-weights value) Error 2 (manual reading-weights value)Negative stroke Error 1 (visual detection-weights value) Error 2 (manual reading-weights value)
Visual detectionManual readingVisual detectionManual reading

0000000000
0.0250.0243430.0240.0006570.0010.0256100.0250.00061000.26/0.24
0.0500.0487270.0490.0012730.0010.0497610.050.00024000.51/0.10
0.0750.0743860.0750.00061400.0758760.0760.0008760.0010.25/0.35
0.1000.1004080.0990.0004080.0010.1001470.10.00014700.16/0.06
0.1250.1250600.1250.00006000.1254820.1260.0004820.0010.024/0.19
0.1500.1497620.150.00023800.1506470.1510.0006470.0010.095/0.26
0.1750.1746130.1750.00038700.1747200.1760.0002800.0010.155/0.11
0.2000.1983160.20.00168400.2015400.2010.0015400.0010.674/0.62
0.2250.2250530.2240.0000530.0010.2251490.2250.00014900.02/0.06
0.2500.2493440.2490.0006560.0010.2493440.2490.0006600.0010.26/0.26