公开(公告)号：US06725184B1

公开(公告)日：2004-04-20

申请号：US09602119

申请日：2000-06-23

申请人： Rajit Gadh ,  Hari Srinivasan

发明人： Rajit Gadh ,  Hari Srinivasan

IPC分类号： G06F1900

CPC分类号： G05B19/41805 ,  G05B2219/31065 ,  G05B2219/31066 ,  Y02P80/40 ,  Y02P90/04

摘要： The ability to perform Assembly/Disassembly analysis of one or more components of the geometric model (e.g., a CAD model) of a multi-component assembly is helpful for design, construction and tear-down, maintenance (in-place and replacement), and reuse/recycling of the assembly. To facilitate assembly and disassembly analysis of geometric models, methods have been developed which allow generating, editing, validating and animating/digitizing assembly/disassembly sequences and directions for 3D geometric models, e.g., CAD models. These methods allow assembly/disassembly analysis to be performed based on non-contact geometric reasoning (i.e., spatial reasoning rather than contact reasoning) to determine an optimal non-interfering sequence (a valid sequence) to disassemble/assemble the modeled components. The methods are readily implemented in computers and similar electronic processing units to allow automated assembly/disassembly analysis, as exemplified by a software system called Assembly Disassembly in Three Dimensions (A3D). The A3D system maintains a hierarchical assembly structure for the geometric model and allows the user to add constraints to possible assembly/disassembly sequences, edit the overall shape of a modeled component, compute the resultant sequence of component removals/additions and their paths, and visualize assembly/disassembly by displaying the assembled and disassembled model and animating its assembly/disassembly steps.

摘要翻译： 对多组件组件的几何模型（例如，CAD模型）的一个或多个组件进行组装/拆卸分析的能力有助于设计，构造和拆除，维护（就地和更换）， 以及组件的再利用/回收。 为了便于对几何模型进行组装和拆卸分析，已经开发出可以生成，编辑，验证和动画化/数字化3D几何模型（例如CAD模型）的装配/拆卸顺序和方向的方法。 这些方法允许基于非接触几何推理（即，空间推理而不是接触推理）执行装配/拆卸分析，以确定用于拆卸/组装所建模的部件的最佳非干扰序列（有效序列）。 这些方法很容易在计算机和类似的电子处理单元中实现，以允许自动装配/拆卸分析，例如称为三维尺寸拆卸（A3D）的软件系统。 A3D系统维护几何模型的分层装配结构，并允许用户为可能的装配/拆卸序列添加约束，编辑建模组件的整体形状，计算组件移除/添加及其路径的合成顺序，并可视化 通过显示组装和拆卸的模型并动画化其组装/拆卸步骤来组装/拆卸。

公开(公告)号：US06525732B1

公开(公告)日：2003-02-25

申请号：US09506353

申请日：2000-02-17

申请人： Rajit Gadh ,  Xiaochun Liu ,  Chi-Cheng P. Chu ,  Jianchang Qi

发明人： Rajit Gadh ,  Xiaochun Liu ,  Chi-Cheng P. Chu ,  Jianchang Qi

IPC分类号： G06T1700

CPC分类号： G06T15/20

摘要： A three-dimensional object may be imaged from several viewpoints distributed about the object, and the image obtained at each viewpoint may be stored in conjunction with the viewpoint's coordinates about the object. The object's image can then be transmitted for display over a client-server computer network, and the user may issue commands to manipulate the object, so as to very accurately simulate manipulation of the actual three-dimensional object. The client computer may display the object's image from one of the viewpoints. If the user then wishes to manipulate the object, the user will issue a command to the server to index from the coordinates of the first viewpoint to the coordinates of some adjacent viewpoint(s). The images of the adjacent viewpoints will then be displayed in a sequence corresponding to the order in which the coordinates of the viewpoints are indexed. Zooming (enlargement and reduction of views) and other features are also discussed, as well as various procedures for enhancing transmission time (and thus display speed).

摘要翻译： 可以从关于物体分布的多个视点对三维物体进行成像，并且可以结合关于物体的视点坐标来存储在每个视点处获得的图像。 然后可以通过客户端 - 服务器计算机网络传输对象的图像，并且用户可以发出操纵对象的命令，以便非常准确地模拟对实际三维对象的操纵。 客户端计算机可以从其中一个视点显示对象的图像。 如果用户希望操纵对象，则用户将向服务器发出命令，以从第一视点的坐标到某些相邻视点的坐标进行索引。 然后，以与视点的坐标被索引的顺序对应的顺序显示相邻视点的图像。 还讨论了缩放（放大和缩小视图）等功能，以及增强传输时间（以及显示速度）的各种程序。

公开(公告)号：US06629065B1

公开(公告)日：2003-09-30

申请号：US09409569

申请日：1999-09-30

申请人： Rajit Gadh ,  Tushar H. Dani

发明人： Rajit Gadh ,  Tushar H. Dani

IPC分类号： G06E1750

CPC分类号： G06T17/10 ,  G06F17/5086 ,  G06T19/20 ,  G06T2210/12 ,  G06T2219/2016 ,  G06T2219/2021

摘要： Apparata and methods for rapid design of objects/shapes in Computer-Aided Design (CAD) tools and in Virtual Reality (VR) environments are described. The underlying geometric representation of the objects within the design tool is optimized so that design activities such as modeling, editing, rendering, etc. can be processed extremely rapidly, thereby enhancing the response time of the design tool. The representation is preferably provided in two parts, which may be referred to as a “design intent model” and a “shape model”. The design intent model is a higher-level representation wherein elements are arranged in hierarchical parent-child relationships which record the elements' assembly sequence. The shape model is a lower-level representation storing more detailed information about the elements and their relationships. During editing of the design, the user acts on the design intent model, and the design intent model is mapped to the shape design model so that it is updated to reflect the changes therein. The design intent model is in many cases sufficient by itself to allow basic editing of the model and rendering of the edited model, but where editing operations grow sufficiently complex that the design intent model lacks sufficient information to allow the operation to be performed, the shape model can be relied upon for the information necessary to complete the operation.

摘要翻译： 描述了在计算机辅助设计（CAD）工具和虚拟现实（VR）环境中快速设计对象/形状的设计和方法。 设计工具中对象的底层几何表示被优化，可以极快地处理诸如建模，编辑，渲染等设计活动，从而增强设计工具的响应时间。 该表示优选地以两部分提供，其可以被称为“设计意图模型”和“形状模型”。 设计意图模型是更高级别的表示，其中元素被排列在记录元素的装配序列的分级父子关系中。 形状模型是存储有关元素及其关系的更详细信息的较低级别表示。 在编辑设计过程中，用户对设计意图模型采取行动，并将设计意图模型映射到形状设计模型，以便更新以反映其中的变化。 在许多情况下，设计意图模型本身足以允许模型的基本编辑和编辑模型的渲染，但是当编辑操作变得非常复杂时，设计意图模型缺少足够的信息以允许执行操作，形状 可以依赖模型获取完成操作所需的信息。

公开(公告)号：US20060129347A1

公开(公告)日：2006-06-15

申请号：US11294102

申请日：2005-12-05

申请人： Rajit Gadh ,  Shivanand Prabhu ,  Xiaoyong Su ,  Harish Ramamurthy

发明人： Rajit Gadh ,  Shivanand Prabhu ,  Xiaoyong Su ,  Harish Ramamurthy

IPC分类号： G01M19/00

CPC分类号： G01D21/00

摘要： A generic transducer interface includes a hardware connector, such as a pin connector, with connection points for electrically connecting to a transducer, a control, a non-volatile memory for storing firmware used to configure the control, and a wired/wireless communication interface. The firmware indicates pre-assigned functions of the connection points, as well as providing: (a) data processing services, which perform operations on data elements from the transducers to obtain results which are reported to an external host, (b) data reporting and reception services, which include a data reporting protocol for reporting data from the transducers to the host, and a data receiving protocol for receiving data from the host, and (c) transducer management services, which allow retrieval and reconfiguration of transducer-specific properties. Transducer-specific configuration data received from the external host configures the control with the information it needs to act as an interface for a particular transducer.

摘要翻译： 通用传感器接口包括诸如针式连接器的硬件连接器，其具有用于电连接到换能器的连接点，控制器，用于存储用于配置控制的固件的非易失性存储器以及有线/无线通信接口。 固件指示连接点的预先分配的功能，以及提供：（a）数据处理服务，其对来自换能器的数据元素执行操作，以获得报告给外部主机的结果，（b）数据报告和 接收服务，其包括用于报告从换能器到主机的数据的数据报告协议，以及用于从主机接收数据的数据接收协议，以及（c）换能器管理服务，其允许检测和重新配置换能器特定属性。 从外部主机接收的特定于传感器的配置数据使用其需要用作特定传感器的接口的信息来配置控制。