Measured distance and pole position programming are checked at the data processing unit. If both agree, position counter, pole signal generator and pole number generator deliver respective outputs. In the following, main features of the device are described. This device which can measure the distance with non-contact so that it dose not disrupt the physical properties of an object to be measured and it is free from slip or friction in measuring. This device can measure the distance of an object with a radial surface and a wide range.
Test results The following results are confirmed.
The device can't measure wet rail. The device is improved based on test results. Beam spot diameter is extended from 1x 4mm to 1x 5mm. So, even if one sensor fails, the other one can take over and measure the distance. The following effects are confirmed.