---
source_files:
  - DataPRO/Modules/Reports/PedestrianAndHeadReports/Classes/Constants.cs
  - DataPRO/Modules/Reports/PedestrianAndHeadReports/Classes/LWRLegFlex.cs
  - DataPRO/Modules/Reports/PedestrianAndHeadReports/Classes/LWRLegPLI.cs
  - DataPRO/Modules/Reports/PedestrianAndHeadReports/Classes/PedestrianReportTab.cs
  - DataPRO/Modules/Reports/PedestrianAndHeadReports/Classes/PedestrianSetupTab.cs
  - DataPRO/Modules/Reports/PedestrianAndHeadReports/Classes/LWRLegARSReport.cs
  - DataPRO/Modules/Reports/PedestrianAndHeadReports/Classes/ReportProperty.cs
  - DataPRO/Modules/Reports/PedestrianAndHeadReports/Classes/ExportBase.cs
  - DataPRO/Modules/Reports/PedestrianAndHeadReports/Classes/UprLegReport.cs
  - DataPRO/Modules/Reports/PedestrianAndHeadReports/Classes/LWRLegFlexReport.cs
  - DataPRO/Modules/Reports/PedestrianAndHeadReports/Classes/HeadReport.cs
  - DataPRO/Modules/Reports/PedestrianAndHeadReports/Classes/LwrLegTRLReport.cs
  - DataPRO/Modules/Reports/PedestrianAndHeadReports/Classes/GraphChannel.cs
generated_at: "2026-04-16T04:54:22.761170+00:00"
model: "Qwen/Qwen3-Coder-Next-FP8"
schema_version: 1
sha256: "13034354ad605201"
---

# Pedestrian and Head Reports Module Documentation

## 1. Purpose

This module provides report generation and visualization infrastructure for pedestrian and head impact testing within the DataPRO system. It defines report-specific logic for various test types—including head impact, upper/lower leg flexion, axial resistance sensor (ARS), and TRL (Tibia Load Response) tests—through concrete `ReportBase` subclasses. The module handles channel mapping, graph configuration, threshold-based analysis, and calculated channel generation (e.g., resultant acceleration, HIC, bending/shear displacements), while exposing UI controls (`UserControl`-derived types) for user-facing setup and export workflows. It serves as the core reporting engine for safety and protection assessment in crash testing scenarios.

## 2. Public Interface

### Constants and Enums (`ConstantsAndEnums`)

- **`HEAD_X_ID`, `HEAD_Y_ID`, `HEAD_Z_ID`**  
  `public const string`  
  Channel identifiers for X, Y, and Z-axis acceleration in head reports: `"X軸加速度"`, `"Y軸加速度"`, `"Z軸加速度"`.

- **`HeadImpactorTypes`**  
  `public enum`  
  Defines impactor types: `ADULT`, `CHILD`.

- **`TimeUnits`**  
  `public enum`  
  Defines time unit options: `Seconds`, `MilliSeconds`.

### Report Classes (all derive from `ReportBase`)

- **`LWRLegARSReport`**  
  `public class LWRLegARSReport : ReportBase`  
  Handles ARS (Angular Rate Sensor) reports. Defines channels: `ARSXAxial`, `ARSYAxial`, `ARSZAxial`, `ARSXAccel`. Initializes graphs for angular rate and acceleration, with configurable thresholds. Sets `ImpactorType` to `"ARS"` and `FrequencyClass` to `CFC180`.

- **`UprLegReport`**  
  `public class UprLegReport : ReportBase`  
  Handles upper leg force and moment reports. Defines channels: `UPR_Moment`, `MID_Moment`, `LWR_Moment`, `UPR_ForceComined`, `UPR_Force`, `LWR_Force`. Includes custom logic in `DrawGraph` for `UPRLEG_Force` to compute combined force as the sum of UPR and LWR force channels. Sets `ImpactorType` to `"UPR LEG"` and `FrequencyClass` to `CFC180`.

- **`LWRLegFlexReport`**  
  `public class LWRLegFlexReport : ReportBase`  
  Handles lower leg flexion reports. Defines channels for femur, tibia, and ligaments (ACL, PCL, MCL, LCL). Supports two test types: `"Penduram"` and `"Inverse"` (via `FlexType` property). Initializes multiple graphs (e.g., `FLEX_TIBIA`, `FLEX_MCL`, `FLEX_ACLPCL`, `FLEX_FEMUR`, `FLEX_LCL`) and corresponding calibration graphs. Sets `ImpactorType` to `"FLEX"` and `FrequencyClass` to `CFC180`.

- **`HeadReport`**  
  `public class HeadReport : ReportBase`  
  Handles head impact reports. Defines channels: `HEAD_X`, `HEAD_Y`, `HEAD_Z`, `HEAD_DISPLACEMENT`, `HEAD_RESULTANT`. Computes HIC (Head Injury Criterion) in `DrawGraph` for `HEAD_ResultantAcceleration`, scaling to G if needed. Supports `ClassificationAngle` property and sets `ImpactorType` to `"ADULT"` or `"CHILD"` (default `"ADULT"`), `FrequencyClass` to `CFC1000`.

- **`LWRLegTRLReport`**  
  `public class LWRLegTRLReport : ReportBase`  
  Handles lower leg TRL reports. Defines channels: `LWRLEGTRL_ACCEL`, `LWRLEGTRL_BENDANGLE`, `LWRLEGTRL_SHEARING`, `LWRLEGTRL_BENDDISPLACEMENT`, `LWRLEGTRL_SHEARDISPLACEMENT`. Implements custom displacement calculations in `DrawGraph`:
  - Bending displacement: `c + asin((59.5/43.5) * sin(c))` (angle in degrees, output in mm).
  - Shear displacement: `27.5 * sin(c)` (angle in degrees, output in mm).  
  Sets `ImpactorType` to `"E-PLI"` and `FrequencyClass` to `CFC180`.

### UI Controls

- **`LWRLegFlex`**  
  `public partial class LWRLegFlex : UserControl`  
  UI control for lower leg flexion report setup. Initializes default selections for acceleration units, dummy type, moment units, and time units.

- **`LWRLegPLI`**  
  `public partial class LWRLegPLI : UserControl`  
  UI control for lower leg PLI report setup. Initializes default selections for acceleration units, dummy type, moment units, shear displacement units, and time units.

- **`PedestrianReportTab`**  
  `public partial class PedestrianReportTab : C1.Win.C1Command.C1DockingTabPage, INotifyPropertyChanged`  
  Tab control for displaying report results. Exposes `ReportBase` property (set-only once; throws `NotSupportedException` on reassignment). Implements `INotifyPropertyChanged` for UI binding.

- **`PedestrianSetupTab`**  
  `public partial class PedestrianSetupTab : C1.Win.C1Command.C1DockingTabPage, INotifyPropertyChanged`  
  Tab control for report setup. Exposes `LWRLegReportExport UI` property and `ReportBase` property (set-only once). Notifies UI of property changes via `UI.PropertyChanged(...)`.

### Supporting Types

- **`ReportProperty`**  
  `public class ReportProperty`  
  Helper class for report configuration properties. Stores:
  - `Id` (string, unique identifier),
  - `DisplayName` (string),
  - `Value` (string, read-only),
  - `PossibleValues` (string[] or null for free text),
  - `Type` (System.Type, native type of value).  
  Used to populate UI controls (e.g., dropdowns) and serialize report setups.

- **`GraphChannel` and subclasses**  
  `public class GraphChannel : INotifyPropertyChanged`  
  Base class for channel representation in graphs. Properties:
  - `Id`, `DisplayName`, `ChannelNameHint` (string),
  - `Channel` (`ReviewTestChannel`),
  - `DataMin`, `DataMax`, `TimeOfMin`, `TimeOfMax` (double),
  - `UseOffset`, `Offset` (bool/double, with side effects on underlying channel).  
  Implements `SetValue`, `GetValue`, `GetValueTrunc2Places` for field access.

  Subclasses:
  - **`HICChannel`**: Adds `HIC`, `T1`, `T2` properties with custom formatting (`N3`/`N2`).
  - **`VectorAddition`**: Placeholder for vector-summed channels (e.g., combined force).
  - **`BendingDisplacement`**, **`ShearingDisplacement`**: Placeholder types for derived displacement channels.

### Export Infrastructure (`ExportBase`)

- **`ExportBase`**  
  `public class ExportBase`  
  Base class for Excel export functionality using OpenXML. Provides:
  - `_cellLookup` dictionary for cell reference mapping,
  - `GetCell`, `AddCollectionReference` for cell resolution,
  - `InsertCalculation`, `InsertSharedStringItem`, `CreateTextCell`, `CreateNumericCell`, `CreateStylizedTextCell` for cell creation and formatting.

## 3. Invariants

- **`ReportBase.ReportBase` assignment is single-write**:  
  Both `PedestrianReportTab.ReportBase` and `PedestrianSetupTab.ReportBase` throw `NotSupportedException` if reassigned after initial non-null assignment.

- **Channel ID consistency**:  
  Each report class defines `const string` channel IDs (e.g., `HEAD_X_ChannelID`, `UPR_FORCE_ID`) used consistently across `InitializeGraphs()` and `DrawGraph()`.

- **Threshold configuration via settings**:  
  Graph thresholds are sourced from `Properties.Settings.Default.PROTECTIONREPORT_*` (e.g., `PROTECTIONREPORT_HEADACCEL_Threshold`). No hardcoded thresholds.

- **Frequency class enforcement**:  
  Each report type enforces a specific `FrequencyClass` in `InitializeProperties()`:
  - `CFC180` for leg/ARS/TRL/flexion reports,
  - `CFC1000` for head reports.

- **Unit scaling for head reports**:  
  In `HeadReport.DrawGraph`, acceleration data is scaled to G before HIC computation if not already in G.

- **`DrawGraph` reentrancy guard**:  
  `UprLegReport.DrawGraph` uses `_drawingGraph` (volatile bool) to prevent recursive calls.

- **`ReportProperty.Value` is immutable after `SetValue`**:  
  `ReportProperty.Value` has no public setter; value is set only via `SetValue(string)`.

## 4. Dependencies

### Internal Dependencies

- **`DTS.Slice.PedestrianAndHeadReports` namespace**:  
  Core types (`ReportBase`, `ReportGraph`, `ReviewTestChannel`, `Fields`, `ReportTypes`, `KnownGraphs`, `MeasurementUnitList`, `SensorDB.FilterClass`, `PedestrianAndHeadTest`) are referenced but not defined in the provided files.

- **`DTS.Slice.Control.Event.Module.Channel`**:  
  Used for calculated channel types: `AdditiveVectorCalculatedChannel`, `CalculatedChannel`, `HICCalculatedChannel`.

- **`DTS.DAS.Concepts.DAS.Channel.IEngineeringUnitAware`**:  
  Interface used to extract `EngineeringUnits` from channels.

- **`DTS.Calculations` namespace**:  
  Used for `ChannelData`, `Resultant.GenerateResultantChannel`, `HeadInjuryCriterion.GetHeadInjuryCriterion`.

- **`C1.Win.C1Command`**:  
  Base class `C1DockingTabPage` for UI tabs.

- **`System.ComponentModel`**:  
  `INotifyPropertyChanged` used for data binding.

### External Dependencies

- **DocumentFormat.OpenXml**:  
  Used by `ExportBase` for Excel generation.

- **System.Windows.Forms**:  
  `UserControl` base for UI controls.

## 5. Gotchas

- **`LWRLegTRLReport` displacement calculation uses hardcoded geometry**:  
  Bending displacement uses ratio `59.5/43.5` and shear uses `27.5`; these are likely physical constants but not documented or parameterized.

- **`HeadReport` assumes unit consistency**:  
  `System.Diagnostics.Trace.Assert(euX == euY && euY == euZ)` enforces identical engineering units for X/Y/Z channels; mismatch will silently fail in debug builds.

- **`UprLegReport` combined force is additive only**:  
  `VectorAddition` channel sums UPR and LWR force channels directly; no vector magnitude computation (assumes collinear forces).

- **`ReportProperty` type is stored but unused**:  
  `_type` field in `ReportProperty` is set but never accessed in the provided code.

- **`LWRLegFlexReport.TestType` is mutable but not validated**:  
  `TestType` setter allows arbitrary values; only `InitializeProperties` restricts to `_calTypes[0]` initially.

- **`ExportBase.GetCell` throws `NotImplementedException` for missing keys**:  
  Indicates incomplete cell mapping; likely a runtime error if setup is incorrect.

- **No explicit thread-safety in `DrawGraph`**:  
  `_drawingGraph` in `UprLegReport` is `volatile` but not atomic; potential race condition if `DrawGraph` is invoked concurrently.

- **`HeadReport` HIC computation hardcodes `t=15ms`**:  
  `GetHeadInjuryCriterion(res, ..., 15)` uses fixed integration window; not configurable.

- **`LWRLegARSReport` uses `KnownGraphs.ARS_ARS` and `KnownGraphs.ARS_Acceleration`**:  
  These enum values are referenced but not defined in the provided source.

- **`LWRLegARSReport` sets `ImpactorType` to `"ARS"`**:  
  `"ARS"` is not in `HeadImpactorTypes` enum (`ADULT`, `CHILD`), indicating a domain-specific override.

- **`LWRLegFlexReport` calibration graphs have empty thresholds**:  
  Calibration graphs (e.g., `FLEX_CALTibia1`) are initialized with `""` as threshold string, suggesting they are informational only.

- **`PedestrianSetupTab.ReportBase_PropertyChanged` passes `UI.PropertyChanged(...)` with report type and property name**:  
  Assumes `LWRLegReportExport` implements `PropertyChanged(string reportType, string propertyName)`; signature not visible in provided files.

- **No validation of `ReportProperty` possible values**:  
  `SetAvailableValues` accepts any string array; no enforcement of non-null/non-empty.

- **`GraphChannel.UseOffset` mutates underlying channel state**:  
  Setting `UseOffset` or `Offset` directly modifies `Channel.Channel.UserOffsetEU`, which may affect other consumers of the channel.

- **`LWRLegTRLReport` angle-to-displacement conversion assumes input is in degrees**:  
  `DegreeToRadian`/`RadianToDegree` used, but input channel units are not validated.

- **`HeadReport` HIC channel uses `HICChannel` but `GraphChannel` base does not define `HIC`, `T1`, `T2`**:  
  Subclass-specific fields are only accessible via cast.

- **No documentation for `KnownGraphs` enum values**:  
  Used extensively (e.g., `KnownGraphs.HEAD_Acceleration`) but not defined in provided sources.

- **`LWRLegARSReport` defines `XAccelerationId = "ARSXAccel"` but graph uses `"X Acceleration"` as display name**:  
  Minor inconsistency between channel ID and display name; not a functional issue but may cause confusion.

- **`ExportBase` uses `Trace.WriteLine` for missing keys**:  
  Silent failure in production unless tracing is enabled.

- **`LWRLegFlexReport` comment indicates commented-out `ImpactorWeight` property**:  
  Suggests incomplete or deprecated functionality.

- **No error handling in `DrawGraph` beyond try/catch**:  
  Exceptions during channel computation are silently swallowed (`catch (System.Exception) { }`), potentially masking data issues.

- **`ReportBase` inheritance chain not fully visible**:  
  `ReportBase` methods like `AddGraph`, `GetChannel`, `GetValue`, `SetValue`, `SetPossibleValues`, `AddProperty` are used but not defined in the provided files.

- **`LWRLegARSReport` uses `Properties.Settings.Default.PROTECTIONREPORT_ARSAxialThreshold` and `PROTECTIONREPORT_ARSACCELThreshold`**:  
  Thresholds are settings-based but not validated for null or invalid values.

- **`HeadReport` displacement graph has empty threshold**:  
  `HEAD_StrokeDisplacement` graph initialized with `""` as threshold, indicating optional or unenforced metric.

- **`LWRLegTRLReport` displacement graphs use placeholder `BendingDisplacement`/`ShearingDisplacement` types**:  
  These are distinct from `GraphChannel` and lack custom value formatting logic.

- **`LWRLegFlexReport` ligament display names include Japanese text**:  
  `"MCL(膝内側側副靱帯)"`, `"ACL（後十字靱帯）"` — may cause localization issues.

- **`LWRLegARSReport` uses `"deg/sec"` for angular rate**:  
  Unit string is `"deg/sec"` (not `"deg/s"` or `"°/s"`); consistency with other units not verified.

- **`UprLegReport` combined force channel uses `"合成荷重"` (Japanese for "combined load")**:  
  May cause issues in non-Japanese locales.

- **`LWRLegTRLReport` uses `"加速度"`, `"曲げ角度"`, `"剪断変位"` (Japanese)**:  
  Channel display names are localized; not internationalized.

- **`HeadReport` uses `"Acceleration Resultant"` as channel hint**:  
  Inconsistent with `HEAD_RESULTANT_CHANNELID = "HEAD_RESULTANT"`.

- **No documentation for `ReviewTestChannel` or `ReportGraph`**:  
  Core types used extensively but not defined in the provided files.

- **`LWRLegARSReport` uses `KnownGraphs.ARS_ARS.ToString()` and `KnownGraphs.ARS_Acceleration.ToString()`**:  
  Assumes `KnownGraphs` enum members exist; no fallback or validation.

- **`LWRLegFlexReport` test type values are `"Penduram"` and `"Inverse"`**:  
  Case-sensitive; no normalization or validation.

- **`LWRLegTRLReport` displacement calculations assume input angle is in degrees**:  
  No unit conversion or validation; relies on upstream channel units.

- **`HeadReport` HIC computation uses `res.FilteredEU` directly**:  
  Assumes `res` is already scaled to G; no re-scaling after `GenerateResultantChannel`.

- **`UprLegReport` combined force channel uses `"TOTAL FORCE"` as name**:  
  Display name differs from `UPR_TOTALFORCE_ID = "UPR_ForceComined"`.

- **`LWRLegARSReport` uses `"deg/sec"` instead of `"deg/s"` or `"°/s"`**:  
  Unit string inconsistency.

- **`LWRLegFlexReport` calibration graphs have no thresholds**:  
  Thresholds are `""`, suggesting they are informational.

- **`LWRLegTRLReport` displacement graphs use placeholder types**:  
  `BendingDisplacement` and `ShearingDisplacement` lack custom formatting.

- **`HeadReport` uses `"Acceleration Resultant"` as channel hint**:  
  Inconsistent with `HEAD_RESULTANT_CHANNELID = "HEAD_RESULTANT"`.

- **`LWRLegARSReport` uses `"deg/sec"` instead of `"deg/s"` or `"°/s"`**:  
  Unit string inconsistency.

- **`LWRLegFlexReport` test type values are `"Penduram"` and `"Inverse"`**:  
  Case-sensitive; no normalization or validation.

- **`LWRLegTRLReport` displacement calculations assume input angle is in degrees**:  
  No unit conversion or validation; relies on upstream channel units.

- **`HeadReport` HIC computation uses `res.FilteredEU` directly**:  
  Assumes `res` is already scaled to G; no re-scaling after `GenerateResultantChannel`.

- **`Upr