Sensor Head Mount CDR
Project Scope Review
The sensor head mount is used to collect soil data as part of the science mechanism to analyze it and determine whether the soil should be studied further by being collected. Incorrect readings on temperature, carbon dioxide, or moisture sensors can threaten the success of the science mission. The sensor head mount allows the sensors to interface with the soil with the right conditions.
Success Factors Review
Relevant Competition Rules
Teams are given between 20 and 35 minutes to collect data with the rover
At each site the team needs to determine the absense or presense of life
Criteria | Constraints |
|---|---|
Allow the moisture sensor to collect data from the soil | Sensor head must not interfere with P0233 or any other components like the dinolite camera |
Allow the C02 sensor to collect data from soil | Allow the dinolite microscope camera to be rotated and refocused |
Allow the temperature and humidity sensor to collect data from the soil | CO2, moisture, and temperature and humidity sensors need to be positioned lower than the bottom of the orange and cyan 3d printed parts (the black line showing the edge of the soil) (See picture) If the sensors are positioned above that point then when being lowered into the soil, the blue and cyan parts will interfere with it. 
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Sensor head should aim to minimize weight | The sensor head has a limited number of poitns at which it can attach and as such it can only be so large before it fails. |
Design Concept Review
Criteria
The CO2, moisture, and temperature sensors are able to interface with the soil correctly. The CO2 and temperature sensors are mounted within enclosures which ensures better sealing of the environment. Once the part is 3D printed further adjustments might be made for better sealing of these sections. The design allows the insertion of the moisture sensor to appropriate depth
The sensor head is relatively small which helps to minimise the weight
Constraints
Sensor head does not interfere with any of the other components; it is sufficiently small such that it does not interfere with the dinolite camera and allows it to freely move
All three sensors interface with the soil at a lower point than the bottom section of P0234
The sensorhead is attached at two points with several screws. Its weight is safely distributed among these two points.
DFMA Review
The sensor head will be 3D printed (if printing it in one piece is not viable it can be redesigned to be in two parts and then joined with fasteners once both parts are printed)
The M3 x 0.5 14mm screws will be sourced from McMaster-Carr
Budgeting Information
The cost of printing filament
The cost of the fasteners (M3 x 0.5 20mm) is $0.04 at EMS
Timeline
Plan to 3D print the design this weekend and if everything fits it will be completed once the fasteners arrive. If any revisions are made the part will be reprinted on Thursday or later.
Planning to finish before the 19th of December