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# 逼近对位功能快速参考
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## 1. 文档范围
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本文档基于当前仓库 `main` 分支最新已提交代码整理,描述 [`MainShell/Motion/ApproachAlignment`](D:/ww/盘古/PanGu.DieBonderApp/MainShell/Motion/ApproachAlignment) 目录下逼近对位模块的真实实现、调用方式和接入注意事项。
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说明:
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- 本文档以 `git` 最新已提交代码为准。
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- 若旧 README、注释或设计文档与代码不一致,以代码为准。
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- 当前模块的流程框架已具备,但坐标变换仍需业务侧补齐真实实现。
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## 2. 文件清单
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| 文件 | 说明 |
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|------|------|
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| `ApproachAlignment.cs` | 数据结构和接口定义 |
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| `ApproachAlignmentService.cs` | 逼近对位主流程 |
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| `CenterRecognizer.cs` | 中心识别实现 |
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| `CoordinateTransformer.cs` | 坐标转换实现 |
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## 3. 核心类型
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当前代码中,以下类型定义在 [`ApproachAlignment.cs`](D:/ww/盘古/PanGu.DieBonderApp/MainShell/Motion/ApproachAlignment/ApproachAlignment.cs) 中:
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- `ApproachAlignmentAxis`
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- `ApproachAlignmentRequest`
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- `ApproachAlignmentResult`
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- `CoordinateTransformResult`
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- `ICenterRecognizer`
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- `ICoordinateTransformer`
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### 3.1 ApproachAlignmentAxis
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用于描述参与逼近对位的单根轴:
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- `AxisName`:轴名
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- `ToleranceValue`:该轴允许误差
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- `Description`:可选描述,用于日志或调试
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### 3.2 ApproachAlignmentRequest
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用于描述一次逼近对位请求:
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- `Axes`:参与对位的轴列表
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- `Camera`:相机类型,默认 `CameraType.UpCamera`
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- `MaxIterations`:最大迭代次数,默认 5
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- `MoveTimeoutMilliseconds`:运动超时,默认 30000
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- `RecognitionTimeoutMilliseconds`:识别超时,默认 10000
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### 3.3 ApproachAlignmentResult
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用于描述逼近对位结果:
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- `Succeeded`:是否成功收敛
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- `CompletedIterations`:实际完成的迭代次数
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- `FinalErrors`:各轴最终误差
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- `FinalAxisPositions`:各轴最终位置
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- `Exception`:失败或取消时的异常
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- `Message`:结果消息
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## 4. 当前真实入口
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当前 `git` 最新代码中,逼近对位的真实调用入口是:
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- [`ApproachAlignmentService.cs`](D:/ww/盘古/PanGu.DieBonderApp/MainShell/Motion/ApproachAlignment/ApproachAlignmentService.cs)
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主要方法:
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```csharp
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Task<ApproachAlignmentResult> ApproachAlignmentAsync(
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ApproachAlignmentRequest request,
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CancellationToken cancellationToken = default(CancellationToken))
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```
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注意:
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- 当前 `SafeAxisMotion` 中并没有 `ApproachAlignmentAsync()` 或 `ApproachAlignment()` 这组方法。
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- 旧 README 中写到 `SafeAxisMotion.ApproachAlignmentAsync()` 的内容,和当前代码不一致。
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- 实际接入时应直接注入并调用 `ApproachAlignmentService`。
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## 5. 工作流程
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[`ApproachAlignmentService.cs`](D:/ww/盘古/PanGu.DieBonderApp/MainShell/Motion/ApproachAlignment/ApproachAlignmentService.cs) 当前实现的是一个迭代式流程:
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1. 根据请求进入循环,最多执行 `MaxIterations` 次。
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2. 首次迭代调用 `ICenterRecognizer.RecognizeCenterAsync()` 识别中心。
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3. 调用 `ICoordinateTransformer.TransformAsync()` 将视觉中心转换为各轴目标位置。
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4. 把转换结果封装为 `MotionMoveRequest` 数组。
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5. 调用 `SafeAxisMotion.SafeMoveAsync()` 执行多轴移动。
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6. 再次识别中心。
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7. 再次做坐标转换。
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8. 用“当前轴位置”和“新转换目标位置”计算误差。
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9. 如果所有轴误差都在各自 `ToleranceValue` 内,则成功结束。
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10. 否则继续下一轮迭代,直到达到最大迭代次数。
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## 6. 必须实现或理解的接口
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### 6.1 ICenterRecognizer
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接口定义:
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```csharp
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Task<(double CenterX, double CenterY)?> RecognizeCenterAsync(
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CameraType camera,
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int timeoutMilliseconds,
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CancellationToken cancellationToken = default(CancellationToken));
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```
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当前默认实现是 [`CenterRecognizer.cs`](D:/ww/盘古/PanGu.DieBonderApp/MainShell/Motion/ApproachAlignment/CenterRecognizer.cs)。
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它的真实行为是:
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- 依赖 `IVisionAlgorithmService`
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- 构造 `VisionProcessRequest`
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- `AlgorithmType = VisionAlgorithmType.FindCenter`
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- `CaptureOptions = CameraCaptureOptions.CreateStream(timeoutMilliseconds)`
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- 从结果里读取 `OffsetX` / `OffsetY`
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- 识别失败时返回 `null`
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如果你们已有自己的视觉流程,也可以替换成自定义的 `ICenterRecognizer` 实现。
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### 6.2 ICoordinateTransformer
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接口定义:
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```csharp
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Task<CoordinateTransformResult> TransformAsync(
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double centerX,
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double centerY,
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IEnumerable<ApproachAlignmentAxis> axes);
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```
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当前默认实现是 [`CoordinateTransformer.cs`](D:/ww/盘古/PanGu.DieBonderApp/MainShell/Motion/ApproachAlignment/CoordinateTransformer.cs)。
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但需要特别注意:
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- 当前实现只是占位版本
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- 它会给每根轴写入 `0.0` 作为目标位置
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- 然后直接返回 `Succeeded = true`
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这表示:
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- 逼近对位的流程框架是完整的
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- 但真实标定坐标转换还没有完成
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- 若直接用于生产逻辑,目标位置会被错误地写成固定值
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因此,接入前必须替换为你们设备真实可用的坐标变换实现。
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## 7. 依赖关系
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当前 `ApproachAlignmentService` 构造函数依赖:
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- `SafeAxisMotion`
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- `ICenterRecognizer`
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- `ICoordinateTransformer`
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- `HardwareManager`
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依赖注入示例:
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```csharp
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protected override void ConfigureIoC(IStyletIoCBuilder builder)
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{
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builder.Bind<SafeAxisMotion>().ToSelf().InSingletonScope();
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builder.Bind<ICenterRecognizer>().To<CenterRecognizer>().InSingletonScope();
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builder.Bind<ICoordinateTransformer>().To<CalibratedCoordinateTransformer>().InSingletonScope();
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builder.Bind<ApproachAlignmentService>().ToSelf().InSingletonScope();
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}
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```
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说明:
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- `CenterRecognizer` 可以直接复用当前实现
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- `ICoordinateTransformer` 建议替换为你们自己的真实标定实现,不建议直接使用当前占位版 `CoordinateTransformer`
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## 8. 推荐接入方式
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### 8.1 典型调用流程
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```text
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1. 创建 ApproachAlignmentAxis 列表
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2. 创建 ApproachAlignmentRequest
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3. 调用 ApproachAlignmentService.ApproachAlignmentAsync()
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4. 检查 ApproachAlignmentResult.Succeeded
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5. 如失败,查看 Exception 或 Message
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6. 如成功,读取 FinalAxisPositions 和 FinalErrors
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```
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### 8.2 示例代码
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```csharp
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public async Task<ApproachAlignmentResult> RunApproachAlignmentAsync(CancellationToken cancellationToken)
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{
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var request = new ApproachAlignmentRequest(
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new[]
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{
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new ApproachAlignmentAxis("Axis_X", 0.01) { Description = "X axis" },
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new ApproachAlignmentAxis("Axis_Y", 0.01) { Description = "Y axis" }
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},
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camera: CameraType.UpCamera)
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{
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MaxIterations = 5,
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MoveTimeoutMilliseconds = 30000,
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RecognitionTimeoutMilliseconds = 10000
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};
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var result = await _approachAlignmentService.ApproachAlignmentAsync(
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request,
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cancellationToken);
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if (!result.Succeeded)
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{
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throw result.Exception ?? new InvalidOperationException(result.Message);
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}
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return result;
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}
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```
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## 9. 自定义坐标转换器示例
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以下示例展示如何替换当前占位版 `CoordinateTransformer`:
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```csharp
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public class CalibratedCoordinateTransformer : ICoordinateTransformer
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{
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public Task<CoordinateTransformResult> TransformAsync(
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double centerX,
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double centerY,
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IEnumerable<ApproachAlignmentAxis> axes)
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{
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var result = new CoordinateTransformResult();
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foreach (var axis in axes)
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{
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var target = CalculateTarget(axis.AxisName, centerX, centerY);
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result.AxisPositions[axis.AxisName] = target;
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}
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result.Succeeded = true;
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return Task.FromResult(result);
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}
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private double CalculateTarget(string axisName, double centerX, double centerY)
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{
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// 替换为实际标定变换逻辑
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throw new NotImplementedException();
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}
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}
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```
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## 10. 日志输出示例
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当前代码里,`ApproachAlignmentService` 会输出类似这样的日志:
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```text
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[INFO] Approach alignment iteration 1/5 started.
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[INFO] Center recognized: X=1024.5600, Y=768.3200
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[INFO] Coordinate transformation completed: 2 axes.
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[INFO] Axes moved successfully: 2 axes completed.
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[INFO] Center recognized again: X=1023.9800, Y=768.1500
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[INFO] Axis: Axis_X, Current: 100.0250, Expected: 100.0200, Error: 0.005000, Tolerance: 0.0100, WithinTolerance: True
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[INFO] Axis: Axis_Y, Current: 200.0150, Expected: 200.0100, Error: 0.005000, Tolerance: 0.0100, WithinTolerance: True
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[INFO] Approach alignment succeeded after 1 iteration(s).
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```
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如果异常发生,也会记录失败日志,例如:
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- `Center recognition failed.`
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- `Coordinate transformation failed: ...`
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- `Failed to get current position for axis ...`
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## 11. 常见问题
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### Q: 如何修改最大迭代次数?
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A: 设置 `ApproachAlignmentRequest.MaxIterations`。
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### Q: 如何设置不同轴的允许误差?
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A: 为每个 `ApproachAlignmentAxis` 设置不同的 `ToleranceValue`。
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### Q: 能否在执行中途取消?
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A: 可以,通过 `CancellationToken` 取消。取消后结果中的 `Exception` 会记录取消异常。
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### Q: 如何查看每个轴的最终误差?
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A: 查看 `ApproachAlignmentResult.FinalErrors`。
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### Q: 逼近失败时如何获取原因?
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A: 查看 `ApproachAlignmentResult.Exception` 或 `ApproachAlignmentResult.Message`。
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### Q: 当前默认实现能直接用于生产吗?
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A: 不建议。`CenterRecognizer` 基本可接真实视觉流程,但 `CoordinateTransformer` 仍是占位实现,必须先替换。
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## 12. 当前状态总结
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当前 `ApproachAlignment` 模块的真实状态是:
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- 数据结构已经完整
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- 主流程已经完整
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- 视觉识别已有可接真实系统的实现
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- 运动执行复用了 `SafeAxisMotion`
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- 坐标变换仍需业务侧补齐真实算法
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- README 中旧的 `SafeAxisMotion.ApproachAlignmentAsync()` 说法已经不适用
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接入建议:
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- 直接注入 `ApproachAlignmentService`
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- 保留当前 `CenterRecognizer` 或替换成自定义实现
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- 优先补齐真实的 `ICoordinateTransformer`
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- 在真实设备上联调前,不要使用默认 `CoordinateTransformer` 做生产动作
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