What is PX4FLOW?

The PX4FLOW (Optical Flow) Sensor is a specialized high resolution downward pointing camera module and a 3-axis gyro that uses the ground texture and visible features to determine aircraft ground velocity.

What is an optical flow sensor?

An optical flow sensor is a vision sensor capable of measuring optical flow or visual motion and outputting a measurement based on optical flow. Various configurations of optical flow sensors exist. One configuration is an image sensor chip connected to a processor programmed to run an optical flow algorithm.

What is Hereflow?

Here Flow is a finger size optical flow sensor. Compared with other optical flow sensors, it is even smaller. It can be installed easily at any position without taking much space. A LiDAR component, an optical flow camera and a 6D IMU (ICM20602) are integrated in the Here FLOW.

What Pixhawk 4?

Pixhawk 4® is an advanced autopilot designed and made in collaboration with Holybro® and the PX4 team. It is optimized to run PX4 v1. 7 and later, and is suitable for academic and commercial developers. It is based on the Pixhawk-project FMUv5 open hardware design and runs PX4 on the NuttX OS.

What sensors are in Pixhawk?

Sensors

MPU6000 as main accel and gyro.
ST Micro 16-bit gyroscope.
ST Micro 14-bit accelerometer/compass (magnetometer)
MEAS barometer.

Does Pixhawk 4 have GPS?

PX4 supports global navigation satellite systems (GNSS) (including GPS, GLONASS, Galileo, BeiDou, QZSS and SBAS) using receivers that communicate via the u-blox, MTK Ashtech or Emlid protocols, or via UAVCAN.

Is Pixhawk and PX4 same?

Pixhawk is the reference hardware platform for PX4, and runs PX4 on the NuttX OS.

Can ArduPilot run on Pixhawk?

They both use MAVLINK, so that Ardupilot and PX4 are both compatible with MissionPlanner.

What is optical flow in OpenCV?

Optical flow is the pattern of apparent motion of image objects between two consecutive frames caused by the movement of object or camera. It is 2D vector field where each vector is a displacement vector showing the movement of points from first frame to second.