How to Determine Optical Resolution and Signal Processing of Infrared Thermometer
Determining Optical Resolution
The optical resolution is determined by the ratio of D to S, which is the ratio of the distance D between the pyrometer to the target and the diameter S of the measuring spot. For example, the handheld infrared thermometer Ti213 of the infrared era has a distance coefficient of 80:1. If it is 80 cm away from the target, the diameter of the measurement range is 1 cm. If the thermometer must be installed far away from the target due to environmental conditions, and a small target must be measured, a thermometer with high optical resolution should be selected. The higher the optical resolution, that is, the higher the D:S ratio, the higher the cost of the thermometer.
Signal processing function:
In view of the difference between discrete processes (such as parts production) and continuous processes, infrared thermometers are required to have multi-signal processing functions (such as peak hold, valley hold, average value) to choose from, such as when measuring the temperature of the bottle on the conveyor belt, it is To use peak hold, the temperature output signal is sent to the controller. Otherwise the thermometer reads a lower temperature value between the bottles. If using peak hold, set the thermometer response time to be slightly longer than the time interval between bottles so that at least one bottle is always under measurement.
