WF34: Create User-defined Sensor Library & Sensors

Pre-requisites

• PHM Module: ability to create sensor library and sensors requires access to the Prognostics Health Management module.
• Configured Project: a project that has been created and adequately defined (see WF02).
• Sensor Information: Sensor data (e.g. sensor specifications or datasheet).

Detailed Descriptions (numbered steps)

1. Access 'Sensor Library' under 'Modeling' in the main menu bar or via the Sensor Library icon in the toolbar.
2. Add a User-defined Sensor Library via the right-click context menu or the "Add a User Sensor Library" button on the right-hand side. Define a Name and Description for the Library.
3. Add a Sensor Category via the context menu or the "Add a Sensor Category" button, which will create a new sensor category under the selected user sensor library. Define a Name and Description for the Category.
4. Define the Sensed Elements that sensors within the category will be able to detect, by checking the relevant tick-boxes.
5. Continue adding categories until all categories are defined. Sub-categories may be defined within a parent category.
6. Select a target category to begin creating sensors within.
7. Add a sensor to the category via the context menu opened on the category or with the green plus icon button.
8. Define the sensor details and parameters that include name, costs, MTTF, Probability of Detection and Specificity.
9. Define the sensed element(s) that are relevant to the sensor. This list is populated by the sensed elements that were defined for parent categories.
10. Define any additional information for the sensor.
11. Repeat the process until all sensors have been defined for all categories within the user-defined sensor library.
12. User-defined Sensor Library with categories and sensors have been created.

Fields referenced in the diagram

• Add User Sensor Library: Library Name, Library Description
• Add Sensor Category: Category Name, Category Description
• Add New Sensor: Sensor Name, Part Number, Vendor, Vendor Number, Dimensions, Weight, Sensor Cost, Cost of Detection, MTTF, MTTR, Probability of Detection, Specificity
• Define Additional Sensor Information: Description, Detection Method, Signal Type, Operating Environment, Constraints

Decision points

• All categories defined? — No → loop back to Add Sensor Category; Yes → Select Category.
• All Sensors Defined? — No → loop back to Select Category; Yes → User-defined Sensor Library Created.

Outputs

• Sensor Library: a user-defined sensor library with sensors enabling further Prognostics Health Management analyses. These libraries can be exported as a file which can be shared. The file can be locked to prevent changes to defined sensor parameters.

Screenshot walkthrough (captions/labels extracted)

Step 1: Access Sensor Library

• 'Modeling' menu: New Connection, New Item, New RBD Group, Activate Failure Diagram, Hazard Diagram, Functional Diagram, Mission Profile Definition, Requirements, System Environment, Unit Life Parameter, System Model, Bond Graph, Failure Diagram, Functions, RBD Model, Maintenance Actions, System Maintenance Editor, Environment Library, Sensor Library (highlighted), Annotations.

Step 2: Add User Sensor Library

• "Sensor Library" tab: left nav Sensor Libraries. "Sensor Libraries" tree: Sample Sensor Library, "New User Library" (highlighted/selected). Context menu: New Library, New Category, Import Library..., Export Library..., Delete. "Library Details" panel: Name "New User Library", Description "User Library containing sensors for the Training model." "Sensor Selection Optimizers": "Define Sensor Selection Optimizers to aid in choosing sensors from this library." Table (Name): "Training SSO". "Custom Sensor Properties": "Define Custom Sensor properties that can be applied to Sensors or Sensor Categories." Table (Name/Type) empty.

Step 3: Add Sensor Category

• Same "Sensor Library" tab/tree with context menu open on "New User Library": New Library, "New Category" (highlighted), Import Library..., Export Library..., Delete. Same "Library Details" panel as Step 2.

Step 4: Define Sensed Elements

• "Sensor Library" tab: tree "New User Library" > Demonstration Purposes, "Sample Category 1" (selected/highlighted), Sample Category 2-6. "Category Details": Name "Sample Category 1", Description "Sample Sensor category for New User Library." "Custom Properties": "Choose the custom Sensor Properties that are available on Sensors in this Category (and any sub-Categories)." Table (Name/Type) empty. "Sensed Elements": "Check the Sensed Elements, or categories of, that apply to this Category of Sensors. Sensors or Sub-categories below this category will only be able to choose from Sensed Elements that are selected here." Tree: Flow Properties (checked) > Energy (unchecked), Material (checked) > Gas (unchecked), Generic (unchecked), Liquid (checked, expanded) — Bulk modulus, Contamination, Density, Dynamic pressure, Dynamic viscosity, Flow direction, Flow rate, Flow velocity, Kinematic viscosity, Reynolds number, Static pressure, Temperature (all checked).

Step 7: Add New Sensor

• "Sensor Library" tab: tree "New User Library" > Demonstration Purposes, Sample Category 1 (selected) with sub-items "Pressure Sensor" and "Sensor"; Sample Category 2-6. Context menu on Sample Category 1: New Library, New Category, "New Sensor" (highlighted), Import Library..., Copy Category, Delete. "Category Details": Name "Sample Category 1", Description "Sample Sensor category for New User Library." "Custom Properties" (empty table). "Sensed Elements" tree: Flow Properties > Energy, Material > Gas, Generic, Liquid (checked, expanded, all sub-items checked: Bulk modulus, Contamination, Density, Dynamic pressure, Dynamic viscosity, Flow direction, Flow rate, Flow velocity, Kinematic viscosity, Reynolds number, Static pressure, Temperature).

Step 8: Define Sensor Details & Parameters

• "Sensor Library" tab: tree "New User Library" > Sample Category 1 > "Pressure Sensor" (selected), Sensor; Sample Category 2-6. "Sensor Details": Name "Pressure Sensor", Part Number "PS1", Vendor "Sensor Company Inc.", Vendor Number "PS1-A", Dimensions 50.00/20.00/20.00 mm, Weight 100.0 grams, Description (empty); Operation type Automatic, Detection Method Passive, Signal Type Digital, Operating Environment "Dry Environment", Constraints "External temperature not exceeding 80 degr...", MTTF "100000.000 hours", MTTR "0.000 minutes", Sampling interval "0.000 minutes", Test duration "0.000 seconds". Tabs: Costs & Material (selected)/Parameters/Sensed Elements/Custom Properties. "Costs & Material": Acquisition Cost $100.00, Replacement Cost $50.00, False Alarm Cost $10.00, Detection Cost $2.00, Operational Cost $0.01/hr, Testing Cost $0.02/hr. "Personnel"/"Equipment" empty ("New personnel"/"New equipment" placeholders).
• Second instance: "Parameters" tab selected: "Inputs" — Direct entry (selected): Probability of Detection "98%", Specificity "90%", "ROC Curve Analysis..." button; Measurement based (unselected): True Positive, False Positive, True Negative, False Negative. "Calculated Parameters": Probability of Detection 98%, Specificity 90%, False Negative Rate 2%, False Alarm Rate 10%, Positive Predictive Value N/A, Negative Predictive Value N/A, Accuracy N/A, Balanced Accuracy 94%, Likelihood Ratio Positive 9.80, Likelihood Ratio Negative 0.02, Matthews Correlation Coefficient N/A. MTTR updated to "5.000 minutes".

Step 8: Define Sensor Sensed Element(s) & Custom Properties

• "Sensed Elements" tab: table "Select All"/"Deselect All"/Search: Liquid Kinematic viscosity, Liquid Temperature, Liquid Flow direction, Liquid Reynolds number, Liquid Dynamic pressure (checked/selected, highlighted), Liquid Bulk modulus, Liquid Static pressure (checked), Liquid Timing, Liquid Contamination, Liquid Flow velocity.
• "Custom Properties" tab: "Custom Sensor Properties:" table (Name/Type/Value) — empty.