How a high temperature infrared thermometer works

How the infrared thermometer works:

The infrared thermometer consists of an optical system, a photodetector, a signal amplifier and signal processing. The optical system gathers the infrared radiation energy of the target in its field of view, and the infrared energy is focused on the photodetector and converted into the corresponding electrical signal, which is then converted into the temperature value of the measured target

The choice of infrared thermometer mainly considers the temperature range, the temperature range of Hong Kong products is -50 1600 degrees, each model of thermometer has its specific temperature range, the temperature range of the selected instrument should match the temperature range of the specific application:

Target size: When measuring temperature, the measured target should be larger than the field of view of the thermometer, otherwise there is an error in the measurement, it is recommended that the size of the measured target exceed 50% of the field of view of the air thermometer. Optical resolution is the ratio of the probe of the temperature closure instrument to the diameter of the target, if the thermometer is far away from the target, and the target is small, a high-resolution thermometer should be selected.

Abstract:Infrared thermal imager can be used to detect human body temperature, the speed is faster, the efficiency is higher than that of the Dan, it is more suitable for large-scale body temperature screening in places with a large amount, its principle is mainly to use the infrared radiation emitted by the human body to obtain infrared thermal image, different colors represent the different temperatures of the measured object, by viewing the thermal image, you can observe the overall temperature distribution of the measured target, this detection method will not actively emit infrared rays, but passively receive infrared radiation, and will not cause harm to the human body, you can use it with confidence. Let's take a look at the principle of infrared thermal imaging thermometer.

1. Can infrared thermal imaging cameras measure human body temperature?

In railway stations, subways, airports, hospitals, supermarkets and other places with a relatively large amount, the use of ordinary infrared thermometers to measure body temperature is slower and less efficient, in order to quickly detect body temperature without affecting traffic, so infrared thermal imaging thermometers began to be used.

The infrared thermal imager can measure body temperature, and its detector can passively receive the infrared radiation of the measured object, convert it into a temperature value, and finally visually display the temperature distribution of the measured object, which has the characteristics of non-contact measurement, temperature visualization, large-area measurement, and can avoid missed detection, and has no harm to the human body, so it is widely used in large-scale body temperature screening.

2. What is the principle of infrared thermal imaging thermometer?

Infrared thermal imaging thermometer is used to measure the temperature of the infrared thermal imager, it can measure the body temperature of people in and out of a large area, very practical, many friends do not know much about the working principle of the infrared thermal imager, the following is for you to introduce:

The working principle of the infrared thermal imaging camera is: "any object higher than absolute zero emits infrared radiation", using the infrared detector and the optical imaging objective lens, the infrared radiation energy distribution pattern of the measured target is accepted, and it is reflected on the photosensitive element of the infrared detector, so as to obtain the infrared thermal image, this thermal image map corresponds to the heat distribution field on the surface of the object, different colors represent the different temperatures of the measured object, by viewing the thermal image, the overall temperature distribution of the measured target can be observed, Study the fever of the target so as to make a judgment on the next step.

3. Is the temperature measurement of infrared thermal imaging camera harmful to the human body?

No. The principle of temperature measurement of thermal imaging camera is to passively receive infrared radiation emitted by objects to image and measure temperature, and it does not actively emit infrared rays, so measuring body temperature with thermal imaging cameras will not cause harm to the human body.

Infrared temperature measurement is composed of optical system, photodetector, signal amplifier and signal processing, display output and other parts.

The optical system concentrates the infrared radiation energy of the target in its field of view, and the size of the field of view is determined by the optical parts of the thermometer and their positions.

The infrared energy is focused on the photodetector and converted into the corresponding electrical signal. The signal passes through the amplifier and signal processing circuit, and is corrected according to the algorithm and target emissivity inside the instrument and then converted into the temperature value of the measured target.