SmartNanotubes Smell INSPECTOR Technical Manual

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Technical Manual

Smell Inspector

Document Version: 1.3.0; for Software Version: >= Desktop 1.5.0, iOS: 1.4.0, Android: 1.4.0

Document release date: March 2023

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Page 1 Technical Manual Smell Inspector Document Version: 1.3.0; for Software Version: >= Desktop 1.5.0, iOS: 1.4.0, Android: 1.4.0 Document release date: March 2023...
Page 2: Table Of Contents
1. Overview ....................5 1.1 Purpose of the Manual ..........................5 1.2 Getting Started ............................5 1.2.1 Step 1: Unpacking Your Smell Inspector ....................5 1.1.2 Step 2: Installing the Smell Annotator ....................5 1.1.3 Step 3: Connecting the Smell Inspector ....................5 1.1.4 Step 4: Recording Smells ........................
Page 3 4.3.4 Device cannot be turned on, what can be a problem? ................ 36 4.3.5 Can I use the Smell Inspector with Smell Annotator without a USB connection? ....... 36 4.3.6 Where can I update the Smell Inspector firmware? ................36 4.3.7 Do the different devices react to the smell in the same way?.............
Page 4 4.7.3 Can we access raw measurements collected by other users or internal SNT measurements? ... 39 4.7.4 Can you tell me how you use AI and what approach you take, or is that a trade secret? ....39 5. Operating the Smell Inspector without the Smell Annotator ....41 5.1 USB Measurements ..........................41 5.2 Bluetooth Measurements ........................
Page 5: Overview
It covers everything from an overview of the Smell Inspector's features to the specific steps for training it to detect and distinguish specific smells. Additionally, the manual provides information about the sensitivity and performance of the Smell Inspector's detectors, as well as details on replacing or maintaining them.
Page 6: Product Overview
Technical Manual That's it! You are now ready to start detecting smells with the Smell Inspector. If you have any questions or need further assistance, please consult the manual, or reach out to the support team. Enjoy your journey to the world of electronic olfaction! 1.3 Product Overview...
Page 7: Smell Annotator
Technical Manual 1.3.2 Smell Annotator The Smell Annotator app is a part of the electronic nose developer kit Smell Inspector. The Smell Annotator gives you access to the data from the temperature, humidity, and smell sensors of your Smell Inspector device.
Page 8 Technical Manual Download the appropriate version from Download driver. (1) Go to the Downloads tab and download the Windows version of the driver ( CP210x Windows Drivers (2) Unpack the zip file where you want to use the program. (3) Install the VC redistributable package by running "CP210xVCPInstaller_x64.exe"...
Page 9: Device Control
The Smell Inspector operating mode is visualized with two LEDs. Both the blue and red Reset LED will be off in power-saving mode and the connection of the Smell Inspector to the other devices will be terminated. USB-Port Device control: •...
Page 10: Terminology And Meanings
"Event", you may name it "Start of exposure". The third state is when exposing the device to the smell is terminated, i.e., the Smell Inspector device is taken away from the smell or the substance, smell or gas source is removed from the Smell Inspector.
Page 11: Local (Offline Measurements)
Technical Manual to a stable state. It is recommended to wait for the recovery of at least down to ca. 10% of the response before taking the next measurement. The measurement contains two consecutive Events, considering the standard short measurement. Dependent on Measurement Type and Use Case the event can be different.
Page 12: Smell Inspector
The device has three operational modes: 2.1.1 USB Operating Mode As soon as the Smell Inspector is connected to a PC with a USB cable, it starts sending data via USB. In this mode, the red LED will always remain lit.
Page 13: Smell Inspector Overview
ML algorithm. This can be achieved through the Smell Annotator software platform. 2.2.3 Detectable Gases and Smells The Smell Inspector can detect a wide range of gases, vapors, and smells, the sensitivity of which depends mainly on their concentration/intensity at the measurement location. Some...
Page 14: Process Steps
Smell measurements can be taken using the Smell Inspector together with the Smell Annotator app. To do so, the Smell Inspector device must be connected to the Smell Annotator app. The device can be connected to Smell Annotator mobile application (Android, iOS) via Bluetooth or to desktop application (Windows) via USB connection.
Page 15: Smell Measurement For Annotation
4. Look for "Smell Inspector" in the list of available Bluetooth devices and select it. 5. Once the connection is established, the blue light on the Smell Inspector device will stop blinking and stay solid. You are now ready to start collecting and annotating scent measurements.
Page 16 Technical Manual Figure 8. “Start Smell Measurement” Once you click on “Start Measurement” it will take few seconds for Initialization process. Figure 9. Initialization of a new measurement Measurement started: the graph shows the averaged real-time smell sensor response in the upper panel (change in %) and temperature and humidity values (in °C and %) in the lower panel.
Page 17: Step 2: Add Measurement Information
Technical Manual 3.3.2 Step 2: Add Measurement Information Please add necessary Information about Measurement Name (*), Smell/Substance (*), Use Case, Measurement Setup. (*): Marked as necessary to save the measurement. Figure 11. Add Information 3.3.3 Step 3: Stop and Save Measurement To save the measurement, first click 'Stop Measurement' and then 'Save Measurement'.
Page 18: Step 4: View Saved Measurement In The Measurement List
Recognize Smell The Recognize Smell feature works when Smell Inspector is exposed to a particular smell and the corresponding ML model is selected. The sensor response signals are processed with the ML model, which outputs a prediction of the smell in real time. Recognized smells are visualized in form of a solid line representing current smell/substance in the air with a defined color.
Page 19: Step1: Start Recognize Smell Measurement
Technical Manual saving the measurement data. This information will be used to train the ML model and improve its smell recognition accuracy. To use Recognize Smell feature, please follow the given steps. 3.4.1 Step1: Start Recognize Smell Measurement Once device is ready for taking measurement, click on ‘Recognize Smell’ as shown in Figure 15. It is Figure 15.
Page 20 Technical Manual Figure 17. Selected ML model 3.4.3 Step 3: Start Measurement Once, the model is selected, click on “Start Measurement”. Figure 18. Starting Recognize Smell Measurement Once you click on “Start Measurement” it will take few seconds for Initialization process. ©Smart Nanotubes Technologies GmbH 2023.
Page 21: Step 4: Measurement Started - Initial Stabilization
3.4.5 Step 5: Expose Device to Smell/ Substance When you are prepared, expose the Smell Inspector device to the Smell or Substance you want to recognize. Note: Please keep in mind that the selected model can only predict/recognize smells for which it has been trained.
Page 22: Step 6: Expose Device To Smell/ Substance
Technical Manual Figure 21. Start of Exposure, Add Event information for Reference “Start Exposure.” When an event is registered, a red vertical line appears on the screen. 3.4.6 Step 6: Expose Device to Smell/ Substance Upon exposure of the device to the targeted smell or substance, the selected ML model commences the process of predicting or recognizing the smell.
Page 23: Step 7: End Exposure
3.4.7 Step 7: End Exposure Once smell inspector device is exposed to smell, to end the exposure take the device and target smell away from each other. It is advised to mark an event titled "End Exposure" to document the end of exposure procedure accurately.
Page 24: Step 8: Correct Event Name For Better Reference
Technical Manual 3.4.8 Step 8: Correct Event name for better reference When events are marked by shortly pushing the Power button, their names are automatically incremented in the following order: Event1, Event2, etc. If the event name has to be corrected, you may edit it as shown in figure 25 and figure 26.
Page 25: Step 10: Save Measurement
Technical Manual Once measurement is completed, click on ‘Stop Measurement’ as shown in figure 27. Figure 27. Stop Measurement 3.4.10 Step 10: Save Measurement You may also correct the Smell Information before this step by removing incorrectly detected smells from the list. To save the measurement, click 'Save Measurement' after clicking 'Stop Measurement'. Figure 28.
Page 26 Technical Manual Figure 29. Correct Smell Information in case of Incorrect Prediction You may give your feedback for an improvement of the ML model by rating the recognition accuracy. If the measurement has Incorrect Smell assigned to it, you can correct it by selecting the 'No, I want to correct it' option from the popup.
Page 27 Technical Manual Corrected Smell: Figure 31. Corrected Smell/Substance Information To save the measurement, click on 'Save Measurement' and then select the 'Yes' option in the reappearing popup since you have already corrected the Smell Information. Additionally, provide feedback by rating the accuracy of the model. Figure 32.
Page 28: Step 11: Measurement Saved Successfully
Technical Manual 3.4.11 Step 11: Measurement saved Successfully! When a measurement is saved, the Measurement listing screen appears, with a successful message at the top as shown in Figure 34. Figure 34. Measurement Saved ©Smart Nanotubes Technologies GmbH 2023. All right reserved.
Page 29: Reset Base Level
Technical Manual 3.5 Reset Base Level The reset base level will set a new baseline for the ongoing measurement. A baseline is a fixed point of reference that is used for comparison. Figure 35. Reset Base Level of ongoing Measurement. It serves as a reference point for all subsequent points in the measurement.
Page 30: View The Feature Graph
Technical Manual 3.7 View the Feature Graph The featured graph represents the feature values of the Smell measurement. It gives the inside of the measurement. Currently, Feature graph is only available in desktop app. Figure 37. Feature Graph 3.8 Measurement Analysis Measurement Analysis provides you with an information about smell measurements.
Page 31: Step 1: Select Measurements To Analysis
Technical Manual 3.8.1 Step 1: Select Measurements to Analysis There are two panels on the current screen. On the left panel, there is a measurement listing view where you can select the measurements for which you want to perform the analysis. Analysis graphs will be visible on the right panel.
Page 32: Step 3: Click On 'Get Analysis
Technical Manual 3.8.3 Step 3: Click on ‘Get Analysis’ Click the 'Get Analysis' button to get the Analysis of the selected measurements. Now you should be able to see the screen below. Please note that, LDA graph will only be generated, if in the measurement selection, at least two measurements with the same smell information are selected.
Page 33 Technical Manual Figure 42. Analysis Screen – PCA Here Option X and Y is to select the Principal Component (PC) for the PCA analysis. Here the PCx (x%) is the explained variance ratio in the percentage [%]. The explained variance ratio is the percentage of variance that is attributed by each of the selected components.
Page 34 Technical Manual (1) Comparison of averaged Smell/Substance patterns from all selected measurements. (2) Whether the averaged Smell/Substance patterns for different Smells/Substances are similar or distinct. Figure 44. Analysis Screen – Radar Plot of Each Substance Option Normalization: [Features + data] 1.
Page 35 Technical Manual Figure 45. Analysis Screen – Radar Plot of Each Measurement Option Normalization: [None, Features, Features + data] 1. None: When none is selected for normalization, the data is not normalized. The relative response ΔR/R [%] for every individual feature is directly used to create the pattern.
Page 36: Faqs
4.3.3 The Bluetooth connection is working, but only when the device is connected through USB. To be able to use the Smell Inspector device without a USB connection, 2x AAA batteries are required to be inserted inside the device. Once batteries are inserted, you may need to turn on the device by pressing the power button for more than 4 seconds or by pressing the reset button.
Page 37: How Should The Smell Inspector Device Be Handled During The Measurement
(After 10 minutes of the start of the measurement) Step 4 Now as you want to measure the smell, please put the smell inspector device near the smell substance. Add the event as changing the measurement state. Exposed state of the measurement for 5 minutes.
Page 38: What Is The Event In The Measurement
4.4.8 About measurement drifts in the measurement, Is it normal? Only drift as a response. This is possible due to the shorter distance of the smell inspector device to the substance or smell. Place the smell inspector device as close to the smell / substance as possible, but not directly on the substance (keep it at a safe distance).
Page 39: Is It Possible For Two Measurements Of The Same Smell Substance To Have Varied Graph Responses
4.5.2 Which smells can I recognize with Smell Inspector? The Smell Inspector uses a specific ML model that can only recognize the smells listed in the model information. It's important to note that the model can only predict and identify smells it has been trained to recognize.
Page 40 Technical Manual Our apologies, but we are unable to provide information about our technology, and we hope you can understand our position. ©Smart Nanotubes Technologies GmbH 2023. All right reserved.
Page 41: Operating The Smell Inspector Without The Smell Annotator
As a Smell Inspector user, it is not mandatory to use Smell Annotator software for exploring smell- related applications. You are free to create and use your own software and methods to receive and process the data from Smell Inspector. You may use two options to connect the Smell Inspector to your application.
Page 42: Bluetooth Measurements
"FAN2" command. This functionality is also implemented in Bluetooth operating mode. All the commands provided to the Smell Inspector via USB have a newline ("\n") character at the end of the command. Commands: "FAN1", "FAN2", "FAN3", "FAN0", "GET_INFO".
Page 43: Insights Of The Measurement
So, in a typical measurement with detector types 1, 2, 3, and 4, there will be a total of 15 feature channels. If you want to use Smell Inspector without the Smell Annotator app, you must consider these factors.