P16452: Active Reciprocating Compresor Valve Assembly
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Integrated System Build & Test

Table of Contents

Team Vision for Integrated System Build & Test Phase

For this phase, the team is planning on having all remaining parts machined either with the help of the machine shop or out-sourcing. Also, the team will begin setting up and programming the interfaces in the next three weeks. Specifically, by the end of the next phase, the Electrical engineers will have an implemented, working solution for the force generation issue of the solenoids. On the other hand, the Mechanical engineers will have an implemented, working solution for the displacement sensor which will be used to measure the movement of valves. Below is the Project Plan for the next phase.

Test Results Summary

Displacement Sensor

The Eddie current sensor that was tested during last phase, could effectively measure the displacement of the poppets. However, this sensor could not be integrated into the system since it had to be placed inside the pressure vessel. Based on research and advice of other faculty members, the team decided to use a Hall Effect Sensor to measure the displacement of the poppet as it is actuated up and down. The Hall Effect Sensor is a transducer which varies the output voltage based on the magnetic field it encounters, as seen in Figure 1 below.

The link below is a video of testing this sensor. The initial test results are very promising. It is demonstrated in this video that the sensor will only measure the magnetic field of the magnet inside the solenoid and neglects the field generated by the solenoid itself. This increases the accuracy of our measurements significantly.

https://www.youtube.com/watch?v=WHjTx1XmdNc&index=6&list=PLp3zRSYp_VkaG8MsbXPyOkcyVk7AHDVH1

Figure 1

Figure 1

The Hall Effect Sensor with Arduino

The Hall Effect Sensor with Arduino

Solenoid Force Testing

During the last phase, the team was having problems with the solenoids not generating the expected amount of force. This problem was solved by increasing the length of the poppet, reducing the length of the solenoid, and cutting the number of winding by half.

Below is a video that demonstrates the force generation by the solenoid. The solenoid generated enough force that caused the poppet to lift 170g of weight. https://www.youtube.com/watch?v=1lGBV-XAGjQ&list=PLp3zRSYp_VkaG8MsbXPyOkcyVk7AHDVH1&index=7

Problem Tracking

Problem Tracking

Problem Tracking

Functional Demo Materials

Vessel Stress Analysis

The stress analysis below show that the currently built pressure vessel is safe for our testing purposes.
Vessel Stresses

Vessel Stresses

Pressure Relief Valves

Document below includes a couple of suggestions for purchasing pressure relief valves for the vessel. This is due to safety in case the pressure builds up in the vessel.

Pressure Relief Valves.

Plans for next phase

Based on the updates from the machine shop, the team is hoping to have all parts manufactured by the beginning of next phase. During the next 3 weeks, the team will be working on assembling and testing the active valve and vessel subsystems. The plan is to have these two sub-assemblies integrated and tested for the Full System Demo that’s scheduled on April, 14th.
Project Tasks

Project Tasks

Project Plan

Project Plan


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