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带宽管理器#

The Bandwidth Manager of the pylon Viewer allows you to analyze your system in order to achieve optimum performance when working with more than one camera.

The Bandwidth Manager is only available in the Windows and Linux version of the pylon Viewer. You can open the Bandwidth Manager via the Tools menu or by right-clicking a camera in the Devices pane.

信息

带宽管理器支持 1GigE、5GigE 和 10GigE 网络适配器。它可以确定可用带宽，并相应地在相机之间分配带宽。

将多个相机连接到单台计算机时，由于相机彼此争夺可用带宽，性能可能成为问题。为避免此类冲突，请使用带宽管理器。该工具一目了然地向您显示以下信息：

  • 您系统上安装的USB 3.0主机控制器和GigE网络适配器，以及连接到它们的相机。
  • 每个 USB 3.0 主机控制器可用的总带宽（近似值）
  • 由相机发送、计算机接收到的数据量
  • 由相机发送、计算机接收到的每秒帧数 (fps)
  • 拍摄的图像总数
  • 传输错误的数量，即不完整的图像和跳过的图像

根据此信息，您可以使用带宽管理器来优化所连接相机的带宽消耗。

带宽管理器概述#

带宽管理器对话框列出了您电脑上所有的 USB 3.0 主机控制器和 GigE 网络适配器以及连接到它们的相机。它使您可以将 USB 3.0 主机控制器或网络适配器上可用总带宽的份额分配给每个相机。这样，您只需为相机分配其实际需要的带宽量，从而将资源省下来供其他设备使用。

USB 3.0 cameras: The Bandwidth (MB/s) column also lists how much bandwidth is available on the USB 3.0 host controller to which the cameras are connected. This is an approximate value of the maximum bandwidth available.

GigE cameras: There is an Optimize button for each network adapter. You can click this button to optimize the bandwidth of all selected cameras on this network adapter. You have to select at least one camera for the button to become available.
If you have GigE cameras connected to your computer and open the Bandwidth Manager for the first time, a dialog opens that allows you to optimize all GigE cameras in a single step.
The optimization involves adjusting the Packet Size and Inter-Packet Delay settings. If more than one camera is connected to a network adapter, e.g., via a switch, the available bandwidth is shared across all selected cameras.

If you want to change camera settings yourself, go to the Features - All pane. Note that there are several camera settings that influence the bandwidth consumption, e.g., size of the ROI, pixel format etc.

“带宽管理器”屏幕截图

优化带宽消耗#

To optimize the performance of your system, start by analyzing the current situation. Once you have an overview, you can fine-tune bandwidth consumption. You can change the bandwidth allocated to each camera on the fly, making it really easy to find the perfect balance between several devices.

优化带宽消耗：

  1. 在您要分析的相机上停止连续图像采集以及所有录制。
  2. 打开带宽管理器。
  3. 选择要分析带宽的相机。

  4. 单击开始分析。
    相机右侧的列将填充数据。在图像列中，您可以查看所拍摄图像的总数。如果有任何图像未完成传输或被完全跳过，它们将列在错误列中。
    分析运行时，您可以使用微调框或旁边的滑块来更改特定相机可用的带宽。您将立即在显示的数据中看到更改的效果。

    信息

    带宽值是相机可用的上限，不能超过该值。因此，如果相机未充分利用带宽，更改带宽将不会产生明显效果。只有降幅导致相机无法再达到其帧速率的情况下，您才能看到接收的有效负载 (MB/s) 值的下跌趋势。请注意，有效负载值通常低于可用带宽，因为未包括同时发送的任何开销。

  5. 对结果满意后，单击停止分析。
    “带宽管理器”对话框将显示所选相机的当前带宽。您可以记好此数据以便在其他应用中使用。
    您可以选择停止分析倒计时选项并指定一个时间段，在该时间段后将自动停止分析，而不是手动停止分析。如果您想长时间收集数据，这种方法非常有用。

    信息

    In the Bandwidth Manager dialog, the bandwidth is given in MB/s for improved readability. Depending on your camera, this corresponds to the Device Link Throughput Limit value in the Device Control category or the Device Current Throughput value in the Device Transport Layer category. Both these values are given in B/s.

  6. Optional: Save the current camera settings to a user set to preserve them. Otherwise, if you disconnect the cameras, you will have to repeat the bandwidth configuration.