FALL-DOWN DETECTION SENSOR FOR RAMMER

Title:

FALL-DOWN DETECTION SENSOR FOR RAMMER

Document Type and Number:

WIPO Patent Application WO/2019/064554

Kind Code:

A1

Abstract:

Provided is a fall-down detection sensor for a rammer, which is capable of determining, with high accuracy, a fall-down state of the rammer which operates with a large amount of vibration and shock, and rapidly stopping a motor (engine or the like). The present invention includes an acceleration sensor (2), a low pass filter (3), an integrator (4), a first comparator (5), a second comparator (6), and a control means (7), wherein the second comparator (6) is configured to compare patterns of waveforms of input signals (x'~ z') with patterns of a plurality of kinds of pre-stored sample waveforms (FW) when fall–down occurs, and sample waveforms (NFW) when fall–down does not occur, determine the rammer to have fallen down and output a fall-down detection signal (fs) when similarities with the sample waveforms (FW) when fall-down exceeds a threshold value, and determine the rammer has not fallen down and output a non-fall down signal (nfs), when similarities with the sample waveform (NFW) when fall-down does not occur exceeds a threshold value.

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WO/2000/006879

DEVICE AND METHOD FOR CONTROLLING THE SPEED OF AN INTERNAL COMBUSTION ENGINE

Inventors:

HARASHIMA YOSHINORI (JP)
SAITO HIDEO (JP)
IKEDA MASAHIRO (JP)
HIRAI KAZUMA (JP)
SHIBUICHI YUKI (JP)
KATO KAZUYA (JP)

Application Number:

PCT/JP2017/035670

Publication Date:

April 04, 2019

Filing Date:

September 29, 2017

Export Citation:

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Assignee:

MIKASA SANGYO KK (JP)
NANO STUDIO INC (JP)

International Classes:

E01C19/34

Domestic Patent References:

WO2009095986A1	2009-08-06
WO2009095986A1	2009-08-06

Foreign References:

JPH0943269A	1997-02-14
JP2006104725A	2006-04-20
JP2002521609A	2002-07-16
JP2002071703A	2002-03-12
EP2725144A1	2014-04-30

Other References: