Optical resolution and signal processing of handheld infrared thermometers
Determination of optical resolution
Optical resolution is determined by the ratio of D to S, which is the ratio of the distance D from the pyrometer to the target to the diameter of the measurement spot S. The optical resolution is determined by the ratio of D to S, which is the ratio of D to S. For example, the handheld infrared thermometer Ti213 of the infrared era has a distance factor of 80:1, so if the target is 80 cm away, the diameter of the measuring range is 1 cm. If the pyrometer must be installed far away from the target due to environmental conditions, but also to measure small targets, you should choose a high optical resolution pyrometer. The higher the optical resolution, i.e. the higher the D:S ratio, the higher the cost of the pyrometer.
Signal processing capabilities:
In view of the discrete process (such as parts production) and continuous process is different, so the requirements of infrared thermometer has a multi-signal processing capabilities (such as peak hold, valley hold, average value) can be selected, such as temperature measurement conveyor belt on the bottle, it is necessary to use the peak hold, and the output signal of its temperature is transmitted to the controller. Otherwise the pyrometer reads out the lower temperature value between bottles. If peak hold is used, set the response time of the pyrometer to be slightly longer than the time interval between bottles, so that at least one bottle is always in the measurement.
Proper use of the pyrometer
1, the pyrometer belongs to electronic products, for the use of temperature requirements, the use of temperature to be used in the room temperature 10-40 degrees within the range, but a lot of places in general use is in the outdoors, and the outbreak is occurring in the winter, the temperature is below 10 degrees, or even below zero, resulting in the pyrometer measurement error.
Problem solving: try to keep the measurement in a place with suitable temperature, conditions can be measured 3 times in a row, take the high value.
2, the measurement site, the thermometer to measure the forehead from the measurement site 3-5 cm, if the measurement of the forehead temperature is low, you can measure the wrist, neck, so that it is closer to the real body temperature.
3, strenuous exercise sweating, drinking alcohol and other factors can cause high body temperature, to the body in a calm state after continuous measurement, if still high, need to combine with other clinical methods to confirm.
Thermometer including infrared thermometer, ear thermometer, small electronic thermometer, mercury thermometer and so on. Mercury thermometers are used for home measurements, while infrared thermometers are used for initial screening and small electronic thermometers are used for further screening, which is more efficient.
