Infrared Temperature Sensors

IR-TDoc™ Introduction

The new IR-TDoc™ wireless infrared temperature system is the latest development in infrared body temperature sensing technology for monitoring applications in building, crowds or employee screening. The remote node module has a calibrated temperature sensor with many convenient applications and can be considered a general purpose surface temperature and forehead temperature sensor. As a fixed sensor on an adjustable tripod, people may be tested with no human intervention. Temple and forehead sensing is performed with the IR-TDoc™ moving in an exam room, entrance way by making portable applications. Each transmitter node is powered by internal batteries. Once the sensor is powered up, the readings are constantly transmitted every three seconds with no human intervention. The system is exceptionally easy to use, and requires nothing but a cellphone or computer (with WIFI) to read from any of the ten sensors. The server can be positioned within the Zigbee RF Range, 30 m or about 100 ft indoors. Servers can be locked up, but anyone with the IP address/password may view data.

IR-TDoc™ Operations

The new IRT (Infra-Red Temperature) module has a narrow field of aperture and has an embedded processor temperature controller for a calibrated digital signal. There are two sensor processors: one for the temperature reading signal processor, and the second one for controlling data format and transmission in the IR-TDoc™ sensor. The IR-TDoc™ server has two embedded processors: One for the radio reception and validations, and the second provides a CPU running the LINUX operating system with the Doc program. The LINUX/OS Doc program provides readings from the sensors, and makes a comparison to the reference body temperature. Since the sensors continuously transmit, the Doc makes a series of two to three readings to generate the final accurate reading. Nine seconds is the maximum time needed and the next person in a line may enter the Field of View (FOV). Four to five person readings per minute is typical, and  ten sensors may scan 2400 to 3000 people per hour.

The Doc program performs the analysis and then transmits numbers and in color coded outline. If over the set limits, the Doc sends alarms by email /text message and by audible beeping. Doc saves diagnostic readings on a 2 GB memory stick, and will transmit LAN and WIFI results to any enabled cell phone or wireless laptop

IR-TDoc™ Accuracy 

This module has a very accurate reading to ±0.9° F (0.5° C), is very stable over time. This new system allows small IRT nodes to be distributed throughout an office, and for its recorded data to be collected with a coordinator module then stored in a logger or transmitted to a display or controller. In ordinary circumstances, the accuracy at room temperature is ±0.36° F (0.2° C) forehead sensing.