The outer diameter measuring instrument uses parallel light to detect the outer diameter size, and obtains the shadow size of the measured object with equal scale magnification and reduction. Using pinhole imaging technology, the inverted real image is obtained, which can be said that the detection information is based on the size detection of the entity and the detection is accurate.
The instrument adopts object telecentric optical path and imaging method for online size detection. The core component of detection is photoelectric probe, and each group of probe consists of transmitting lens and receiving lens. The light emitted by the point light source in the transmitting lens forms a parallel light field of view through the transmitting lens and is directed to the receiving lens. The parallel light is focused by the receiving lens, passes through the aperture at the focal position and is imaged on the receiving unit. When the field of view passes through the measured object, the part blocked by the measured object will show a clear shadow on the chip of the receiving unit. Through photoelectric conversion and digital processing, the diameter of the measured object can be calculated by the width of the shadow.
online caliper adopts electronic shutter technology, high-frequency measurement technology, multi-channel synchronization technology, etc. The vibration during product production has no influence on the measurement, so it is very suitable for dynamic detection, and it is a commonly used detection equipment in various production lines.
its measuring range is wide, and it can be customized for .1mm and above, so it can be used to detect both wire cores and large-diameter rolled products. Of course, different measuring ranges have different measuring accuracy. Generally speaking, the larger the measuring range, the lower the measuring accuracy. However, it is generally better than .8mm. At present, its accuracy is about .3mm-.8mm, which can be customized according to the situation, and the large diameter caliper also has the function of adjusting the measuring range.
in addition, the instrument has PID adjustment function, that is, according to the deviation between the measured line diameter and the set nominal value, the screw speed of the extruder or the speed of the tractor is controlled, so that the actual line diameter is as close as possible to the nominal value.