Sensor Issues This week I ran into a bit of a hurdle with the sensors. I would seemingly randomly get consistently false data (MAX_RANGE_VALUE) from the sensors that could be removed from restarting. It seemed to come from just one sensor, but to make it more difficult the port a sensor is plugged into does not correlate to the scanner port in the code. Ultimately I found that two sensors were stuck in configuarion mode and doing a factory reset…
DEMO This week we presented our demo, we were able to each demonstrate our individual parts, but we were not far enough along into integration to demo working together. I presented, three lidars working in conjunction, the 3d printed mount, and a very basic lidar detection algorithm Wearable Worked on having the wearable be self-sustained. Meaning integrating the Pi and battery pack into the belt. And wiring the sensors from the chest harness to the pi. (pictured below). Bolted the…
LiDAR sensors working together: I was able to get all three lidars to send and receive signals with the RaspberyPi with the TTL converter. I crimped the wires for the lidars so they could easily be attached and detached from the TTL USB converter. Then I edited and debugged the simple python scripts to initialize and wr/rd values to/from all three LiDAR sensors. Using a simple round-robin scheme it prints the strength, and distance values to the terminal of all three…
This week in 18-500 Drafting of the custom sensor mount This will be the custom computer drafted 3-D printed plastic board that the 4 sensors will mount to, and the board will mount to the chest harness. The reason for a custom board is because of the need for precision in the relative angles of the LiDar sensors. Below is hand drafts and measurement collections for the Computer-Model. I have begun editing in Inventor Pro. The left page is raw data measurements and drawings of…
SPRING BREAK
DESIGN DOC DUE EARLY THIS WEEK The beginning of the week was focused on creating and proofing our design doc. I focused on writing up the System Design section and Wearable Design. I also worked on the Bill of materials and our updates Block Diagram (As seen below). I also design a draft of the mount that could accommodate 3 LiDar sensors at precise angles relative to each other (depicted below). The plan is to design this in Inventor-Pro and 3D print the…
This week our main focus was on the Design presentation and document. We worked on compiling our work. And finalizing our sensor configuration. We got the ultrasonic sensor to work with pi through an arduino and tested it as a team. We performed tests at 2m, 4m, 6m, and 8m (at varying degrees) in the lab room and tested varying modes of the sensor. We determined that the voltage mode was most acurate but the values were very unstable at 8m….
This week we received our first shipment of parts including a memory card for the pi and an ultrasonic sensor. I installed Raspbian on our pi and began setting it up with sensors. Setup the camera using raspistill and as a team we tested the camera. We simulated jogging with the camera sensor and captured images. We tested for latency, blurriness with movement and focal length would meet our ranges for this project. The focal length worked, the camera has…
What did you personally accomplish this week on the project? Give files or photos that demonstrate your progress. Prove to the reader that you put sufficient effort into the project over the course of the week (12+ hours). Ordered first round of parts. The URM37 Ultrasonic Sensor V5.0 (http://wiki.dfrobot.com/URM37_V5.0_Ultrasonic_Sensor_SKU_SEN0001_ Raspberry Pi ) and a Micro SD Card (https://amzn.to/2WXbS8G). The ultrasonic sensor was researched to have specification in our range of needs, but we are looking to test it properly ourselves…
The Group What are the most significant risks that could jeopardize the success of the project? How are these risks being managed? What contingency plans are ready? The walker/runner’s movement is to violent for the sensors to gain accurate readings: We are working on a more secure way to mount the sensors, pi, and battery pack to the user. We are looking at a more secure lightweight chest harness design for the sensors that maximizes stability. Then a waist harness,…