This is exactly what the world is demanding right now.
A solution for measuring human body temperature on the go - it must be fast, accurate, contactless, and capable of recognizing faces and measuring multiple people simultaneously.Dahua Technology provides such a solution, and credit where credit is due.
System Components and Typical Application
Essentially, the temperature measurement and face recognition system consists of:
Thermal Network Camera - used specifically for temperature measurement through a dual-camera module setup: one normal camera and one thermal camera.
Black Body Calibration Device - produces and maintains a constant temperature (configurable) as a reference point for the thermal camera.
AI-Powered Network Video Recorder (NVR) - required for face recognition, capturing, counting, and storing records with face images and corresponding body temperature measurements. (Note: We did not have access to the NVR during this test - our demo will focus on temperature measurement only.)
Additional Equipment - tripods and brackets for mounting the camera and black body device, along with power adapters.
Installation Example
Here’s how we deployed the system at our test site:
Camera: Dahua Thermal Hybrid Network Camera installed with the black body device placed 3 meters away, clearly visible within the camera's field of view.
Control Interface: A laptop connected to the camera for configuration and monitoring, plus an external TV used as a large display.
System Purpose: Continuous temperature monitoring of individuals in crowded, high-risk locations, such as airports, train stations, hospitals, and other critical facilities.
What Hardware Are We Using?
The device used is a Dahua DH-TPC-BF3221-T Thermal Hybrid Network Camera, capable of measuring human body temperature thanks to its dual-camera configuration:
A standard visible-light camera with an infrared LED.
A thermal imaging camera - both integrated into one unit.
Key feature: accuracy is not affected by masks or helmets worn by individuals.The camera also ignores non-human heat sources (such as hot liquids).It can monitor up to 30 people simultaneously within its field of view.
Thanks to the black body calibration, measurement precision is extremely high, typically within ±0.2°C to ±0.3°C.
The Role of the Black Body Calibration Device
The black body device generates and maintains a specific, constant temperature, serving as a reliable reference point for the thermal camera.In practice, as each person passes through the camera's field of view, the system compares the detected body temperature against the known temperature of the black body; this correlation ensures high measurement accuracy.
Setup & Demonstration
Here’s what we did during the setup:
Activated the camera.
Properly positioned all equipment.
Configured the camera using IVMS-4200 software - defined the measurement zone using a blue rectangle on the screen.
In the demonstration video, we asked our team members to walk in and out of the measurement area.You can observe in real time how the camera accurately captures different body temperatures.
Additionally, when the system detects an abnormal temperature, an alarm siren sounds and a flashing light activates on the camera - both of which can be configured by the user.
Conclusion
In conclusion, this is one of the most in-demand technologies worldwide, especially in the fight against the rapid spread of COVID-19.Data is our most powerful weapon: the more accurately we can monitor potential cases, the more effectively we can control outbreaks.
Primary application sites include airports, train stations, hospitals, and critical production facilities.
And remember - the best way to understand this technology is to see it in action.