What are the components of an infrared thermometer?
All objects with temperatures above zero (-273.15 ℃) are continuously emitting infrared energy into the surrounding space. Its radiation characteristics, size of radiation energy, wavelength distribution, etc. are closely related to the surface temperature of the object. Conversely, by measuring the infrared energy emitted by an object itself, its surface temperature can be accurately measured, which is the mechanism of infrared radiation temperature measurement.
The human body, like other organisms, also radiates and releases infrared energy to the surroundings, with wavelengths typically between 9-13 μ m. It's between 0.76 and 100 μ The near-infrared band of m. Due to the fact that light within this wavelength range is not absorbed by the air, that is to say, the amount of infrared radiation emitted by the human body is not related to environmental impact, but only to the amount of energy stored and released by the human body. Therefore, as long as the infrared energy emitted by the human body is measured, the surface temperature of the human body can be accurately measured. The infrared temperature sensor of the human body is designed and manufactured based on this principle.
The working process of an infrared thermometer: The infrared thermometer is composed 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 position of the thermometer. The infrared radiation from the measured object first enters the optical system of the thermometer, and then the infrared radiation is concentrated by the optical system, making the energy more concentrated; The gathered infrared is input into the photodetector, and the key component of the detector is the infrared sensor, whose task is to convert the optical signal into an electrical signal; The electrical signal output from the photodetector is converted into the temperature value of the measured target after being calibrated by the amplifier and signal processing circuit according to the internal algorithm and target emissivity of the instrument.
CPU: High performance 32Bit RISC
MCU main frequency: 120MHZ
ADC: 24bit high-precision processor
Working voltage: 2.2-5.5V wide voltage
ROM: 512k Flash
Communication interface: UATR, SPI, IIC
Advantages:
24bit ADC high-precision processor
High integration, minimalist peripheral: 1 transistor+18 resistive capacitors
No need for operational amplifier IC, screen driver IC, boost IC, crystal
Built in RTC clock
AES/DES/SM4 hardware encryption
Full time zone calibration
AI compensation algorithm
Supports various types of analog/digital sensors, lattice screens, code break screens, and digital tubes (fully integrated SOC, no need for external driver ICs, power circuits)
Supports 32 sets of storage memory, supports three color backlight display, and can choose between Celsius ° C/Fahrenheit ° F
