GD71-TY.MINI typeInfrared human body temperature screening device

(Mini body temperature screening device)

GD71-TY.MINI typeThe infrared human body temperature screening device is a screening instrument that measures the surface skin temperature of the wrist, with the advantage of being able to quickly screen the surface skin temperature of the human body.GD71-TY.MINIThe infrared human body temperature screening device, also known as the mini body temperature screening device, uses sensors imported from Belgium and measures the surface temperature of the wrist based on the principle of infrared thermal radiation. The instrument consists of hardware components such as a core processing system, display screen, temperature detection sensor, alarm device, and chassis bracket.

Principle of Infrared Thermal Radiation

In nature, all objects with temperatures above zero continuously emit infrared radiation energy into the surrounding space. The size and wavelength distribution of infrared radiation energy in the human body are closely related to its surface temperature. The infrared wavelength emitted by the human body at (36-37 ℃) is 9-13 μ m. Therefore, by measuring the wavelength of infrared radiation emitted by the human body itself, the thermal radiation of the skin on the wrist surface can be accurately measured using the principle of infrared reception to display the surface temperature of the measured object. This is the objective basis for non-contact infrared temperature measurement.

Instrument analysis

• processing system：

The motherboard is installed inside the chassis and fixed back-to-back with the display screen. It consists of high-speed CPU, capacitors, resistors, inductors, crystal diodes, crystal transistors, integrated circuits, and other components. It has the characteristics of high wiring density, light weight, thin thickness, and good safety, and is a component of the overall measurement response time center.

• display:

Adopting a 128 * 64 dot matrix LCD display screen, the main function is to quickly refresh the real-time display of the human surface temperature values detected by the sensor, and equipped with panel protection to ensure clear and intuitive values. The temperature display range is 35 ℃ -42 ℃. When no one passes by, it displays "Lo", and when the surface temperature of the human body is above 42 ℃, it displays "Hi".

• Sensor:

3.1 Adopting Belgian imported sensors with thermal gradient compensation function, consisting of an infrared thermopile detector and a dedicated signal processing chip package. The temperature detection sensor has a detection angle of: 3 ° FOV, response time: 250ms.

3.2 The sensor itself can simultaneously measure the ambient temperature and the surface temperature of the human body.

3.2.1 Environmental temperature Ta

The sensor substrate temperature is measured by PTAT, and all sensor control and data processing are processed on the chip. The linearized sensor chip temperature Ta can also be read from the new product memory. The calculated temperature has a resolution of 0.02 ℃, and the linearized substrate temperature reading is stored in the 006h register of RAM at address 0 × 06

-0 × 06=0 × 2DE4 (11748d) corresponds to -38.2 ℃ (lower limit of linearized output)

-0 × 06=0 × 4DE4 (19908d) corresponds to+125 ℃ (upper limit of linearized output)

Converting RAM values to actual temperature values is very simple, as follows:

Ta[°K]=Tareg×0.02,or0.02°K/LSB.

3.2.2 Human body temperature To

The output result is stored in RAM at a resolution of 0.02 ℃. The calculation of To is as follows:

To [° K]=To_deg × 0.02, or 0.02 ° K/LSB

• Alarm device:

The alarm device consists of an alarm indicator light and a voice module. When the body temperature is less than 37.3 ℃, the prompt sound is "drip"; When the body temperature is ≥ 37.3 ℃, the prompt sound is: rapid "drip drip" (the default alarm value set by the factory is 37.3 ℃).

• Chassis and bracket:

5.1 The overall chassis is made of metal sheet metal, and the inside and outside are treated with spray coating technology, which uses the phenomenon of corona discharge to produce powderpaintAdsorbed on the surface of the chassis.

5.2 The bracket is a split structure, and can be assembled according to the installation steps in the manual during use, which is simple and easy to understand.

• Operating and computing system software:

The system software is a specialized software independently developed by our company for the infrared body temperature screening device. It is registered with the "Computer Software Copyright Registration Certificate" and does not require any operation. After the power is turned on, the system automatically enters working mode.

characteristic

1Unique environmental anti-interference mode enables normal operation in outdoor high-temperature weather;

2The host structure adopts a 45 ° design, making data viewing more intuitive;

3The display screen adopts LCD dot matrix LCD display with backlight function, and data can be read clearly even at night;

4. The detection sensor is imported from Belgium, non-contact long-distance detection, safe and reliable. The sensor hasFeatures such as thermal gradient compensation and high screening accuracy;

5. The high-speed CPU processor ensures that the instrument's warning response time is ≤ 0.25 seconds, improving the efficiency of temperature screening;

6. Turn on the sound and light alarm device when the body temperature is too high to avoid cross infection caused by abortion;

7. Compliant with the European RoHS standard, the screening device does not contain harmful substances to the human body and is safe to use;

8Adopting automatic compensation calibration technology for environmental temperature, the compensation calibration mode is automatically switched to effectively avoid the impact of changes in environmental temperature on the measurement accuracy of the screening instrument;

Compliant with standards

JJF1107 Calibration Specification for Infrared Thermometers for Measuring Human Body Temperature

GB/T 19146 General Technical Conditions for Infrared Human Surface Temperature Rapid Screening Instrument

JJF 1576 Infrared Human Surface Temperature Rapid Screening Instrument Type Evaluation Outline

RoHS 2011/65/EU Directive on the Restriction of the Use of Certain Hazardous Substances in Electronic and Electrical Equipment

application area

Mainly used in stations, airports, hospitals, schools, kindergartens, entry and exit ports, subways, sports venues, concerts, factories, mining areas, entertainment venuesRapid detection of human surface temperature in crowded places such as churches, cinemas, and theaters can effectively and quickly detect human surface temperature, screen people with high body temperature caused by infectious viruses, and thus achieve the goal of avoiding virus transmission.