Determining payload properties using actuator parameter data

    公开(公告)号:US10336150B1

    公开(公告)日:2019-07-02

    申请号:US15368418

    申请日:2016-12-02

    Abstract: Payload properties may be determined utilizing actuator parameter data. A mobile drive unit may transport a payload around a workspace in accordance with one or more safety. To comply with safety policies, a motion controller of the mobile drive unit may limit acceleration and deceleration to safe maximums for given payload characteristics such as payload mass and payload center of gravity. The motion controller may utilize actuators to cause various motions of the mobile drive unit, including motion across a surface, vertical movements of the payload and motion rotating the payload. To ameliorate worst case assumptions about payload characteristics, in accordance with at least one embodiment of the invention, a payload characterization module may obtain information about payload characteristics based on measurements of operational parameters of the actuators. Utilizing motor current data provides a relatively inexpensive mechanism for obtaining such information compared to special purpose sensors, enabling widespread adoption.

    Drive unit with interface to mount and identify multiple different payload structures

    公开(公告)号:US11591023B2

    公开(公告)日:2023-02-28

    申请号:US16450789

    申请日:2019-06-24

    Abstract: A drive unit of a robotic vehicle including a top surface having a mounting interface to interchangeably couple with multiple different modular payload structures configured to transport items in a facility, workspace or inventory management environment. The mounting interface is configured to securely engage with a mounting portion of the variety of different payload structures to enable a versatile exchange of the payload structure for different conveyance applications. The drive unit includes an electrical interface to communicatively couple with the modular payload structures. The drive unit is configured to use data communicated via the electrical coupling and interface to identify a type of modular payload structure that is mechanically coupled to the mounting interface and implement a motion profile (e.g., speed and acceleration parameters) associated with the identified modular payload structure.

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