公开(公告)号：WO2020131615A1

公开(公告)日：2020-06-25

申请号：PCT/US2019/066214

申请日：2019-12-13

Applicant: MTD PRODUCTS INC

Inventor： GUADIZ, Maynard S.

IPC: H02P3/02

Abstract: A self-powered motor braking mechanism (24) includes a dedicated power source (26) sized for braking the respective motor (14) and a dedicated braking circuitry (50) configured to provide hybrid braking of the motor to a targeted stop. The motor braking circuitry is configured, in the event of a loss of primary power driving the motor, to provide a combination of two or more of dynamic braking, active braking and active position control to achieve zero speed of the motor by a target stopping time.

公开(公告)号：WO2020047391A2

公开(公告)日：2020-03-05

申请号：PCT/US2019/049030

申请日：2019-08-30

Applicant: MTD PRODUCTS INC

Inventor： ABRAMSON, Shai ,  CHURAVY, Christopher J. ,  CMICH, Ryan ,  FERENCE, Adam ,  SAUNDERS, Joseph Edward

IPC: A01D34/00 ,  G05D1/02

Abstract: A zone mobility system and method for an autonomous device includes a work area within which the autonomous device is intended to operate, one or more electrically separated boundary conductors, each boundary conductor surrounding a work zone within the work area, a transmitter base electrically connected to at least one of the boundary conductors, and a removably coupled transmitter configured to transmit a signal for directing movement of the autonomous device on the boundary conductor wire, wherein the transmitted signal can be adjusted to optimize the power consumption of the transmitter, and a work operation can be commenced utilizing a transmitter interface and/or utilizing an autonomous device user interface.

公开(公告)号：WO2019046681A2

公开(公告)日：2019-03-07

申请号：PCT/US2018/049023

申请日：2018-08-31

Applicant: MTD PRODUCTS INC

Inventor： MAGGARD, Jay E. ,  GORSAGE, Gregory ,  SMITH, Aaron D.

IPC: G02B7/02

Abstract: An optical sensor housing includes a sensor housing body including an enclosure wall upstanding from a bottom portion and a substantially open top portion defining a cavity in which the optical sensor assembly is located, at least one aperture, and at least one engaging part projecting orthogonally from an outside surface of the sensor housing body, a sensor housing cover including an open central portion, at least one integrally molded compliant flange configured to engage the sensor housing body engaging part and to secure the sensor housing cover to the sensor housing body, and longitudinal ridges extending outwardly and disposed substantially along the length of the sensor housing cover. The sensor housing engaging parts and flanges can provide a quick-lock mechanism operable to secure the sensor housing cover to the sensor housing body without the use of tools or fasteners.

公开(公告)号：WO2017192981A1

公开(公告)日：2017-11-09

申请号：PCT/US2017/031286

申请日：2017-05-05

Applicant: MTD PRODUCTS INC

Inventor： CHURAVY, Christopher J. ,  BLANCHARD, Edward J.

IPC: G05D1/02 ,  A01D34/00

CPC classification number: G05D1/0276 ,  A01D34/008 ,  A01D2101/00 ,  G01S5/00 ,  G05D1/0265 ,  G05D2201/0208 ,  H03M13/156

Abstract: A method for autonomous mower navigation includes receiving a return-to-zero encoded signal including a pseudo-random sequence, transforming the received signal to a non-return-to-zero representation, digitally sampling the non-return-to-zero signal representation in a time domain, filtering the sampled signal utilizing a reference data array based on the return-to-zero encoded signal to produce a filter output, and determining a location of the autonomous mower relative to a defined work area based on an evaluation of the filter output.

Abstract translation: 用于自主割草机导航的方法包括接收包括伪随机序列的归零编码信号，将接收到的信号变换成非归零表示，对非归零表示进行数字采样 - 时域中的归零信号表示，利用基于归零编码信号的参考数据阵列对采样信号进行滤波以产生滤波器输出，以及确定自主割草机相对于定义的位置 工作区域基于对过滤器输出的评估。