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US 9,752,289 B2Granted
Road surface condition determining method, road surface condition outputting method, road surface condition determining device and road surface condition output equipment
AssigneeKomatsu Ltd.
InventorsTomoko Jinno, Ryota Ono, Yasuko Yamamoto
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Abstract
A road surface condition determining method according to the invention includes: detecting a suspension pressure of a dump truck during a travel of the dump truck; calculating a maximum amplitude and a frequency of a detection value of the suspension pressure in a predetermined period of time; and determining a road surface condition based on the maximum amplitude and the frequency.
Claims14
A road surface condition determining method comprising:
- detecting a suspension pressure of a haulage vehicle during a travel of the haulage vehicle;
- correcting a detection value of the suspension pressure based on at least one of a rudder angle of the haulage vehicle or a vehicle speed measurement to obtain a correction value of the suspension pressure,
- calculating a maximum amplitude and a frequency of the correction value of the suspension pressure in a predetermined period of time;
- and
- determining a road surface condition based on the maximum amplitude and the frequency.
2 more elements
A road surface condition determining device comprising:
- a pressure detector configured to detect a suspension pressure of a haulage vehicle during a travel of the haulage vehicle;
- an arithmetic unit configured to correct a detection value of the suspension pressure based on at least one of a rudder angle of the haulage vehicle or a vehicle speed measurement to obtain a correction value of the suspension pressure, and calculate a maximum amplitude and a frequency of a the correction value of the suspension pressure in a predetermined period of time;
- and
- a road surface condition determining unit configured to determine a road surface condition based on the maximum amplitude and the frequency.
1 more element
A road surface condition determining device comprising:
- a pressure detector configured to detect a suspension pressure of a haulage vehicle during a travel of the haulage vehicle;
- an arithmetic unit configured to calculate a maximum amplitude and a frequency of a detection value of the suspension pressure in a predetermined period of time;
- and
- a road surface condition determining unit configured to determine a road surface condition based on the maximum amplitude and the frequency,
- wherein the arithmetic unit is configured to calculate a maximum pitch amplitude and a pitch frequency based on the detection value of the suspension pressure in the predetermined period of time, and wherein the road surface condition determining unit is configured to determine the road surface condition based on the maximum pitch amplitude and the pitch frequency.
2 more elements
Dependencies are inferred from the claim text.