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Systems and methods for sensing cable fault detection in saws

A technology for sensing cables, faults, applied in the field of contact between objects and blades, which can solve the problems of increasing the set-up and operation complexity of non-portable table saws, impractical, and inconvenient ground connections

Active Publication Date: 2020-03-10
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Other types of table saws include portable table saws that are transported between job sites, where it may be inconvenient or impractical to provide a ground connection
Additionally, the need for a ground connection complicates the setup and operation of non-portable table saws

Method used

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  • Systems and methods for sensing cable fault detection in saws
  • Systems and methods for sensing cable fault detection in saws
  • Systems and methods for sensing cable fault detection in saws

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Embodiment Construction

[0056] To promote an understanding of the principles of the embodiments described herein, reference is now made to the description and drawings in the following written description. No limitation of the scope of the subject matter is intended by these references. This patent also encompasses any substitutions and modifications of the illustrated embodiments and any further applications of the principles of the described embodiments that would normally occur to a person skilled in the relevant art to which this document relates.

[0057] As used herein, the term "power tool" refers to any tool having one or more moving parts moved by an actuator, such as an electric motor, internal combustion engine, hydraulic or pneumatic cylinder, or the like. Examples of power tools include, but are not limited to, bevel saws, miter saws, table saws, circular saws, reciprocating saws, jigsaws, band saws, cold saws, cutters, impact driven impact drive, angle grinder, drill, jointer, nail dri...

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Abstract

A method for detecting a fault in a sensing cable in a saw detects a potential failure in the sensing cable as part of an object detection system in a saw. The method includes generating a predetermined excitation signal transmitted through the first conductor and the second conductor in the sensing cable, detecting a return signal from the first conductor and the second conductor in the sensing cable in response to the predetermined excitation signal, identifying the return signal A signal-to-noise ratio (SNR) of the signal, and an output indicative of a fault in the sensed cable is generated in response to the SNR of the return signal being below a predetermined value.

Description

[0001] claim priority [0002] This application claims priority to U.S. Provisional Application No. 62 / 131,977, filed March 12, 2015, entitled "SYSTEM AND METHOD FOR CONTROL OFA DROP ARM IN A TABLE SAW," the entire contents of which are hereby incorporated by reference into this article. This application also claims priority to US Provisional Application No. 62 / 132,004, filed March 12, 2015, entitled "TABLE SAW WITHDROPPING BLADE," the entire contents of which are hereby incorporated by reference. [0003] cross reference [0004] This application is cross-referenced to co-pending US Application No. 15 / 060,709, filed March 4, 2016, the entire contents of which are hereby incorporated by reference. technical field [0005] The present disclosure relates generally to power tools and, more particularly, to methods and systems for detecting contact between an object and a blade in a saw. Background technique [0006] Detection or sensing systems have been developed for use...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23D45/06B23D47/08B23D59/00B23Q17/00B27G19/02F16P3/14G01R29/26G01R31/58
CPCF16P3/12B23D45/06B23D59/001B27G19/02B23D47/08G01R31/54G01R31/52G01R31/58B23D45/067G01R29/26
Inventor D.沃尔佩B.M.拉马斯瓦米I.钱德拉舍卡A.米什拉S.阿亚姆佩鲁马尔E.拉利伯特
Owner ROBERT BOSCH GMBH