33results about How to "Avoid retesting" patented technology

The invention discloses a method and device for detecting a lens stain. The method comprises a step of selecting an interest area of an image, and selecting a test unit in the interest area, a step of obtaining the test pixel in each test unit and the brightness value of each reference pixel, and calculating the average brightness value of the test pixel in each test unit and the reference pixel and the variance of the brightness value, a step of comparing the variance and the variance threshold corresponding to the average brightness value obtained in advance, if the variance is larger than the variance threshold, judging the test pixel in the test unit as a stain, and outputting the pixel position of the stain. For an image which is gradually darkened in a radiating form from a center to an edge, the variance threshold corresponding to the center area with high brightness is smaller than the variance threshold corresponding to an edge area with low brightness, the slight stain of the center area can be easily detected, the edge area with a large variance is not wrongly judged as a stain, and the accuracy and efficiency of a test are improved.

The invention provides a rapid detection method for disengagement degree of a gap and a liquid injection device, belonging to the field of steel rail detection equipment. The rapid detection method for the disengagement degree of the gap is used for detecting the disengagement degree of a gap between track structural layers and comprises the following steps: measuring the width b of the gap; alongthe length direction of the gap, embedding a liquid injection pipe into the interior of the gap, and sealing the gap along the length direction of the gap, wherein an observation hole is also arranged above the gap; filling the interior of the gap, after liquid flows out the observation hole, stopping filling, and metering volume V of the liquid injected into the gap; calculating the area S1 of the gap according to a formula that S1=V / b; and calculating the disengagement degree N of the gap by virtue of the area S of a track board according to a formula that N=S1 / S*100%. By adopting the rapiddetection method for the disengagement degree of the gap and the liquid injection device, detection accuracy can be improved, and the cost of manpower and material resources can be reduced.

The invention relates to a detection device, in particular to a pressure bearing detection device which comprises a first recovery channel, one side of the first recovery channel is communicated withan inner ring detection channel, the other side of the first recovery channel is provided with a discharge channel, the discharging channel is communicated with the inner ring detection channel, a first valve plate is hinged to the communicating part of the discharging channel and the inner ring detection channel; a detection block is arranged on the outer side of the inner ring detection channelin a sliding mode, the detection block is connected with a first supporting rod, a first magnet is arranged on the first supporting rod, a sliding rail is arranged on one side of the first supportingrod, a second supporting rod parallel to the first supporting rod is arranged on the sliding rail in a sliding mode, and a second magnet is connected to one side, facing the first supporting rod, of the second supporting rod, the magnetism of the second magnet is opposite to that of the first magnet, the other side of the second supporting rod is connected with a rope, and the rope is connected with the free end of the first valve plate. The problem that the bearing detection cannot be continuously carried out in the prior art is solved.