1.0Overview
An infrared scanning loop detector based on high-precision measurement detects infrared radiation sources located in a vertical field of view area (very narrow horizontal field of view) of 30 ° or 50 °, and outputs an analog quantity (4-20mA current and 0-10V voltage) proportional to the angle position of the heat source in its vertical field of view. It can be used for loop control and measurement in the metallurgical industry steel rolling process.

This detector is a scanning loop detector that is insensitive to the distance of the heat source target and can be installed very far from the measured object. This detector can detect objects with a minimum temperature of 250 ℃.
This detector uses an OLED display screen, and various parameters of the detector’s operation are fully displayed on the display screen, allowing users to have a clear understanding of the operating status at a glance.

Mainly applicable to:
✸Loop adjustment of bar, wire, and hot strip rolling mills;
✸Strip width control;
✸Central positioning of strip and other products
✸The position of the shear head and tail is used for optimizing the action of the profile rolling mill;
✸Edge position control of continuous casting machine and strip

1.0.1  Scanning principle

The optical area of this detector is scanned by a rotating drum with a polyhedral mirror. If a hot metal passes through the field of view of the detector and the detected infrared radiation is reflected onto the photocell, the internal processing circuit converts the optical signal into an electrical signal. By comparing it with the threshold level, a switching value is output. At the same time, the internal processing circuit calculates the position of the infrared radiation source in the entire scanning area and outputs a set of analog quantities (4-20mA current signal and 0-10V voltage signal) corresponding to the percentage of the scanning area, The process is shown in the following figure:

Technical parameters