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US 12,349,854 B2Granted
Work machine
AssigneeMakita Corporation
InventorHideaki Takano
Life of this patent
Estimating the term…
Abstract
A work machine includes microphones inside the housing. The microphones are configured to collect sound inside the housing, and output sound signals that are electrical signals corresponding to the collected sound. The sound includes an operating noise generated inside the housing due to motion of a machine. The microphones are arranged at different locations inside the housing. The work machine is configured to execute a process related to the operating noise based on the sound signals from the microphones.
Claims12
A dust collector comprising:
- a drive machine for dust collection including a motor and a fan connected to a rotation shaft of the motor;
- a housing that houses the drive machine, the housing including an exhaust port;
- an exhaust path inside the housing for guiding an airflow generated from the fan by motion of the drive machine to the exhaust port located downstream;
- microphones configured to collect sound inside the housing, and output sound signals that are electrical signals corresponding to the sound collected, the sound including an operating noise generated inside the housing by the motion of the drive machine, the microphones being arranged at different locations in the exhaust path;
- and
- a processor configured to execute a process related to the operating noise based on the sound signals from the microphones,
- the microphones including a first microphone and a second microphone,
- the process related to the operating noise including:
- inputting a first sound signal output from the first microphone to one of a delayer and a transfer filter to convert the first sound signal to a virtual-sound signal;
- and
- superimposing the virtual-sound signal and a second sound signal output from the second microphone to generate an operating noise signal which is a sound signal with the operating noise enhanced, and
- the virtual-sound signal corresponding to a sound signal output from the second microphone when it is estimated that the operating noise corresponding to the first sound signal propagates to the second microphone and is collected by the second microphone.
9 more elements
A work machine comprising:
- a machine;
- a housing that at least partly houses the machine;
- microphones configured to collect sound inside the housing, and output sound signals that are electrical signals corresponding to the sound collected, the sound including operating noise generated inside the housing by motion of the machine, the microphones being arranged at different locations inside the housing;
- and
- a processor configured to execute a process related to the operating noise based on the sound signals from the microphones,
- the process related to the operating noise including:
- converting a sound signal output from at least one of the microphones to a virtual-sound signal;
- and
- generating an operating noise signal which is a sound signal with the operating noise enhanced,
- the virtual-sound signal corresponding to a sound signal output from a virtual microphone when it is estimated that the operating noise propagates to a common specific location and is collected by the virtual microphone,
- the operating noise signal being generated by superimposing the sound signals from the microphones, and
- the virtual-sound signal being used for superimposing the sound signals.
9 more elements
A work machine comprising:
- a machine;
- a housing that at least partly houses the machine;
- microphones configured to collect sound inside the housing, and output sound signals that are electrical signals corresponding to the sound collected, the sound including operating noise generated inside the housing by motion of the machine, the microphones being arranged at different locations inside the housing;
- and
- a processor configured to execute a process related to the operating noise based on the sound signals from the microphones,
- the microphones including one or more first microphones and one second microphone,
- the process related to the operating noise including:
- converting a first sound signal output from each of the one or more first microphones to a virtual-sound, signal;
- and
- generating an operating noise signal which is a sound signal with the operating noise enhanced,
- the virtual-sound signal corresponding to a sound signal output from the second microphone when it is estimated that the operating noise propagates to the second microphone and is collected by the second microphone, and
- generating the operating noise signal including superimposing the virtual-sound signal on a second sound signal output from the second microphone to generate the operating noise signal.
9 more elements
Dependencies are inferred from the claim text.