The setting of alarm thresholds for thermometers and common temperature measurement false alarms
Can the alarm threshold of the thermometer be set, and what is the triggering result?
The alarm reminder of the temperature measurement system needs to be set with an alarm threshold, and the size of this trigger value can be set. After triggering, the built-in sound prompt in the software can be called, or the sound can be inputted on-site as the prompt sound; It is also possible to display pictures of suspected heat generating personnel captured under alarm status on the operating terminal and save them in the corresponding file directory for later verification; The specific operation is described in the software settings.
Misreporting of temperature measurement caused by common problems.
In practical use, the temperature measurement system may cause temperature jumps and alarms due to the lack of a reasonable temperature measurement area, which may be affected by environmental factors such as direct air conditioning, direct sunlight, mirror reflection, etc; Alternatively, during area detection, individuals holding cigarette butts, hot water cups, other heating objects, or heat gathering objects in the background may trigger an alarm; In practical use, if there are false alarms, be sure to investigate and troubleshoot such issues.
Factors affecting emissivity and an introduction to the infrared system of infrared thermometers
The main factors affecting emissivity are: material type, surface roughness, physicochemical structure, and material thickness.
When measuring the temperature of a target using an infrared radiation thermometer, the first step is to measure the infrared radiation of the target within its wavelength range, and then the thermometer calculates the temperature of the measured target. The monochromatic thermometer is proportional to the amount of radiation within the wavelength band; The dual color thermometer is proportional to the ratio of radiation in two bands.
Infrared system: The infrared thermometer consists of an optical system, a photodetector, a signal amplifier, signal processing, display output, and other components. The optical system gathers the infrared radiation energy of the target within its field of view, and the size of the field of view is determined by the optical components and their positions of the thermometer. Infrared energy is focused on the photodetector and converted into corresponding electrical signals. The signal is amplified and processed by a signal processing circuit, and converted into the temperature value of the measured target after being corrected according to the algorithm of the instrument's internal therapy and target emissivity.
