Design and assemble 3d printed sensor head mount

Owned by Austin Tailon Huang
Last updated: Dec 20, 2022 by Egor Gorelyy
2 min read

Due Date: Aug 16, 2022

Contributor Log

Name

Contribution

Name

Contribution

Austin Huang

Task Manager

Egor Gorelyy

Owner

Skills

  • 3D printing

  • Sensor mount design

Task Description

  • The sensor head mount is a critical part of the science mechanism that is used to collect soil data

  • There are three main types of sensors located on this mount:

    • Soil moisture sensor (SEN0114)

    • CO2 sensor (SEN0219)

    • Temperature and humidity sensor (DHT22)

  • The current sensor head designed in CAD is incomplete (MR22-SC-A0036)

    • Sensor head parts are interfering with the main assembly, and all of the sensors may not be oriented properly with respect to soil samples

  • The sensor head should complete the following functions:

    • Allow the dinolite microscope camera to be rotated and refocused

    • Allow the moisture sensor to collect data from the soil

    • Allow the C02 sensor to collect data from soil

    • Allow the temperature and humidity sensor to collect data from the soil

  • The owner of this task would be responsible for redesigning the sensor head mount and ensuring all functions above are possible.

Task Breakdown

Determine application specs for each sensor
Design 3D printed sensor head mount to allow each sensor to interface with the soil properly
Conduct a preliminary design review with the mech lead, and determine the scope of changes required if necessary
Update the top-level CAD model of the 3D printed sensor head, ensure the functionality of the entire read head with dinolite camera
Fabricate all required parts, and assemble them onto the science module

Prerequisites

N/A

Progress Journal

  • Sep 10, 2022 @Austin Tailon Huang

    • Task created

  • Oct 4, 2022 @Egor Gorelyy

    • Waiting to get clarifications from the science lead on whether the DHT 22 sensor and CO2 sensor can be inserted right into the soil or only lowered near it

  • Oct 25, 2022 @Egor Gorelyy

    • There was unclearness on the Science subteam as to whether the sensor needed to be submerged in soil or could detect from close proximity

      • Same unclearness also about whether it has to be in a vacuum (or sealed environment) or not

    • Hooked up CO2 sensor to an Arduino, and did some preliminary tests. Asked science lead to come in at some point and test.

  • Nov 15, 2022 @Egor Gorelyy

    • Designed a design for how each sensor will be applied and created some designs for the entire sensor head

    • Had the preliminary design review for the project

  • Dec 21, 2022 @Egor Gorelyy

    • The sensor head CAD has been modified to effectively fit all the sensors but still needs to be printed

    • All the components can be found in the DF Robot box

    • The sensor head needs to be tested: if the sealing on the CO2 sensor is not enough an o-ring could potentially be used to seal it more effectively

    • The sensor head is a little hard to attach to the flange due to the available bolts' length

Relevant Documentation Links