Therefore, you could see the value change on both y and z directions, but compared to z direction, their magnitude is much smaller. When we hold this kettlebell, it not only moves up and down with our jumping action, but also sways left and right, front or back. It is due to our natural sway of body when we change posture. You might notice that the values of y and z acceleration are not zero. When we carry the device and jump up and down, the recorded x, y and z acceleration value also indicates that positive direction of x axis points upward. That means, the positive direction of x axis is now facing upward. If we keep sensor orientation of “front”, but turn smart hub so that its right side is facing up, its x, y and z axes will not swap automatically, as shown below. For example, if we use the default sensor orientation of “front”, positive direction of x, y and z axes are shown in the above image. Setting sensor orientation to different values will affect the direction of x, y and z axes. If you carry the smart hub to jump up with a real acceleration of A m/s 2, the acceleration value is equal to A + 9.81. Similarly, when the device is in free fall and therefore its real acceleration is – 9.81 m/s 2, its raw data shows a magnitude of 0 m/s 2. įor example, when the smart hub is sitting on a table (and not accelerating), the accelerometer’s real acceleration is 0, and plus 9.81 m/ s 2, it reads a magnitude of 9.81 m/s 2. More useful information about motion sensor and accelerometer, please refer to this page. Vertical acceleration raw data = real acceleration of the device + 9.81 m/ s 2 Therefore, to measure the real acceleration of the device, the contribution of the force of gravity must be removed from the accelerometer raw data. The row data contains the acceleration of gravity: 9.81 m/ s 2. Please note the existence of gravity might confuse you when reading the vertical acceleration value of accelerometer. An acceleration sensor measures the acceleration applied to the device. I enjoyed watching Wyatt start out attempting to follow instructions for building a car-like robot, but quickly switch to building his own custom robot that could only be described as a can crusher.In LEGO Spike Prime, its smart hub embeds a motion sensor, which combines a three-axis accelerometer and a three-axis gyroscope. I found the lessons to be academically appropriate for the grade levels SPIKE was intended for, but I also could see myself thinking ways to adapt SPIKE for different levels of academic need. SPIKE is designed for ages 10+, grades 6 to 8. Suitability for Use in a School Environment The idea that SPIKE Prime can take so many forms, even forms not written in the lesson plans, is something both Wyatt and I enjoyed. We saw online that SPIKE Prime can be a robot, a car, a grabbing claw, a locking safe, a factory, and more. Where many robotics kits see students build the same robot over and over again, SPIKE Prime can be built in many permutations. Wyatt is also familiar with block-based coding so he found getting the SPIKE Prime’s software up and running easy and the block-based coding program used to make SPIKE do what Wyatt wanted SPIKE Prime to do was also a pleasant experience.Īs a teacher, this was my favorite part of SPIKE Prime: creativity. Building SPIKE was a breeze for a seasoned veteran like Wyatt, but Wyatt also feels even a LEGO beginner would have an easy time getting SPIKE operational.
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