OAK Thermal

Power-over-Ethernet (PoE)

The base board offers full 802.3af, Class 3 PoE compliance with 1000BASE-T speeds (1Gbps). PoE injector/switch is required to power the device. If need an injector, you can buy it here.

Sensors specifications

Power consumption

Most of the power is consumed by the RVC2, so the power consumption mostly depends on the workload of the VPU:

• Base consumption + camera streaming: 2.5W - 3W
• PoE circuitry: 0.5W
• Thermal sensor: up to 1W
• AI subsystem consumption: Up to 1W
• Stereo depth pipeline subsystem: Up to 0.5W
• Video Encoder subsystem: Up to 0.5W

So the total power consumption can be up to ~6.5W if you are using all the features at 100% at the same time. To reduce the power consumption, you can reduce FPS of the whole pipeline - that way, subsystems won’t be utilized at 100% and will consume less power.

Thermal perception

Thermal cameras detect infrared radiation, which is emitted by all objects based on their temperature. We use a special IR-capable lens to focus the infrared light emitted by all of the objects/scene in view, which is then scanned by an array of infrared-detector elements (“pixels”) in the camera.

Thermal perception range

Thermal perception range is similar to color camera’s range, it mostly depends on the object’s size and temperature. For example, with you can easily detect a large building even from 1km away, but you won’t be able to detect a small animal from that distance. The following table shows the approximate thermal perception range for different object sizes:

The DRI (Detection, Recognition, Identification) ranges are based on the Johnson's criteria, which is a standard for optical systems. Specifications are as follows:

• Detection: The ability to notice that something is there, but without the ability to identify it
• Recognition: Being able to classify the type of object (like distinguishing a car from a truck)
• Identification: The capability to specify the exact nature of the object (like determining the make and model of a car).

Thermal accuracy over distance

Thermal accuracy decreases as the distance increases. To minimize this effect, we perform a 2-point calibration during factory setup. However, some deviation in measurements remains, influenced by the distance and the actual temperature.

M12 PoE connector is used for power and GBit data transfer. Additionally M8 connector for IO connectivity; USB2 (D+, D-), camera IOs (FSIN, STROBE), power, and one auxiliary GPIO. Cap for M8 is included when connector is not used to ensure water resistance. More information can be found here.

Rotate the locking ring (not the connector body) clockwise (CW) with <0.8 Nm torque to securely connect the cable.

Integrated IMU

This OAK camera has an integrated BMI270, a 6-axis IMU (Inertial Measurement Unit). See IMU node for the API details on how to use it.

Operating characteristics

This camera is shipped with IP67 rated enclosure. More details can be found here.

Temperature

The ambient operating temperature of RVC2 based devices is between -20°C and 50°C when fully utilizing the VPU. To find out more, see our operating temperature range documentation.

Code Examples

• Thermal camera streaming
  
• RGB-Thermal stream alignment - with user-defined depth plane 
• Thermal people detection - using on-device neural network inferencing

Package contains:

• OAK-T camera
• M12 plug to RJ45 cable, 2m
• Cleaning cloth

Note: PoE injector / switch is required to power the device and it is not included in the packaging. If you need an injector, you can buy it here.

1. 3D Models (Downloads STEP file)