New DMPS software

Old DMPS system. New DMPS systems that I worked with are far more compact, all components are in one chassis. Check DMPS Photos folder for more pictures.
Source: https://wiki.helsinki.fi/display/SMEAR/DMPS-system+Instructions

GUI to control DMPS measurement device. The device has a simple operating principle. It decides what size of particles to let through. Then it uses a separate CPC device to count the particles. This is repeated to all particle sizes to get size distribution.

Summer intern project for the University of Helsinki. Copy of a GitLab repository. Note that this repository is out of date and will not include updates made others than myself.

Features

General

• Program for DMPS, HalfMini and UFDMPS.
• Basic working principle for all setups is similar. Parameters are different and for example HalfMini uses probably different kind of blower. UFDMPS has two DMAs and two CPCs.
  
  
• ✔️ = Feature is done
• ❌ = Feature is not yet implemented
• ❔ = Not sure if the feature is needed or is implemented

Detectors

• ✔️ TSI CPCs old legacy serial and pulse connection
• ❌ TSI CPCs, new serial, pulse and TCP connections
• ❌ TSI electrometer
• ❌ Airmodus A20
• ❌ Airmodus PSM+A20 (for HalfMini)
• ❌ Airmodus new model (A30?)
• ❌ Airmodus UFCPC model coming?
• ❌ Analog electrometers
• ❌ Also detector status should be saved (concentration and all other data)

DMA's

• ❔ Vienna different lengths
• ❔ HalfMini
• ❔ TSI nano and long

Blowers

• ✔️ Both analog control and pwm using TSI flow meter
• ❌ HalfMini could use 2 x blower (same type as for DMPS) in future

TSI flow meter

• ✔️ Flow, T and P
• ✔️ 4000 series
• ❌ 5000 series

Analog signals

• ✔️ dP (flow), T, P, RH, HV monitor
• ❔ Possibility to add more analog input channels

High Voltage

• ✔️ Stepping voltage (DMPS)
• ❌ Stepping voltage (SMPS)
• ❌ Continous voltage scan (DMPS and SMPS)

PID control

• ✔️ Sheath flow
• ❌ Blower pid using microcontroller?
• ❌ HV control
• ✔️ Blower pid control is executed in separate thread, could be improved

Inversion

• ❌ Python inversion by Anton as module or stand alone old Fortran code from PasiA
• ❌ SMPS inversion? In a separate script but the actual measurement program could give a possibility to determine the delay time.

Parameters

• ✔️ *.INI-file
• ✔️ Program should give a possibility to create the *INI-file (graphical user interface). -> The ini file can be edited in the gui and ini file template is part of this repository. New ini file can not be created with the gui.
• ✔️ Should have also a 'service mode' which allows to change the parameters from GUI. Service mode should show the scaled values.
• ❌ Service mode should also show the raw values

Graphical user interface

• ✔️ Tkinter
• ✔️ Draw graphs of the data

DAQ by NI

• ✔️ NI6211 & 6215

Instructions

Requirements

• Python 3.x.x
• Tested to work with Python version 3.9.7
• NI-DAQmx (NI-DAQmx Runtime might be enough?)

Installation

• Open any terminal program(cmd) and download the repository with git clone https://version.helsinki.fi/atm-tech/new-dmps-software.git you need credentials for that
  • Or just download the zip file from the main page
  • Install the repository to any safe location
    
    
• Create virtual environment with python -m venv env inside new-dmps-software folder
  • Virtual environment enables you to have multiple different python and python module versions installed on the same PC. The Environment to run this program is now isolated virtual environment.
  • Usage of virtual environment is optional
• Activate the env with env\Scripts\activate
  • Make sure you are in correct location so the given file path will work(Root folder which contains env folder)
  • PowerShell might give you trouble
  • If your terminal displays (env) [PATH] everything is working correctly
    
    
• Navigate with cd inside new-dmps-software(root folder of the program)
• Install required depencies with python -m pip install -r requirements.txt
  • Pip probably gives warning to upgrade to a new version. You can do that if you want
  • Installation is now complete

How to start the program

• Navigate inside new-dmps-software folder with any terminal program(cmd)
• Activate the virtual environment env\Scripts\activate
  • PowerShell might give you trouble
  • If you encounter problems ensure that your PATH is correct
• Run the main file with python main.py

Bugs/Issues

• Known small priority bugs are documented in Gitlab's Issues section
• If you encounter a bug you can document it in the Issues section. It would be helpful if you attach debug.log from debug folder (and screenshot of terminal output) to the report