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US 2019/0319608 A1Published application
Automatic filtering method and device
AssigneeOMRON Corporation
InventorsHao ZHANG, Haibin YU, Liangyong DUAN, Lei XU
Life of this patent
Estimating the term…
Abstract
An automatic filtering method and device includes a step of analyzing an input signal so as to obtain its frequency spectrum; and a step of selecting, on the basis of the frequency spectrum, at least one filter from among a plurality of preset filters and filtering the input signal. The method and device automatically use a suitable filter on the basis of the frequency spectrum and repeat simulation of automatic fine adjustment to ensure a filtering effect against noise.
Claims11
An automatic filtering method, comprising the steps of:
- (i) analyzing an input signal so as to obtain a frequency spectrum of the input signal;
- and
- (ii) selecting, on a basis of the frequency spectrum of the input signal, at least one filter from among a plurality of preset filters and filtering the input signal,
- the step (ii) including:
- determining, on the basis of the frequency spectrum of the input signal, a signal type included in the input signal;
- selecting, on a basis of the signal type included in the input signal, a corresponding filter corresponding to the signal type;
- filtering the input signal with use of a first parameter of the corresponding filter and setting a second parameter for the corresponding filter on a basis of a result of the filtering;
- and
- filtering the input signal with use of the second parameter set for the corresponding filter,
- the setting of the second parameter for the corresponding filter on the basis of the result of the filtering including:
- determining, on the basis of the result of the filtering, whether a type of signal which type corresponds to the corresponding filter has been filtered out;
- in a case where the determining shows that the type of signal which type corresponds to the corresponding filter has been filtered out, setting the first parameter of the corresponding filter as the second parameter;
- and
- in a case where the determining shows that the type of signal which type corresponds to the corresponding filter has not been filtered out, repeating a process of adjusting the first parameter of the corresponding filter and simulating a filtering result with use of the adjusted first parameter until the type of signal which type corresponds to the corresponding filter is filtered out and setting the adjusted first parameter as the second parameter.
11 more elements
An automatic filtering device, comprising:
- a signal processing unit configured to analyze an input signal so as to obtain a frequency spectrum of the input signal;
- and
- a first filtering unit configured to select, on a basis of the frequency spectrum of the input signal, at least one filter from among a plurality of preset filters and filter the input signal,
- the first filtering unit including:
- a first determining unit configured to determine, on the basis of the frequency spectrum of the input signal, a signal type included in the input signal;
- a first selecting unit configured to select, on a basis of the signal type included in the input signal, a corresponding filter corresponding to the signal type;
- a second determining unit configured to filter the input signal with use of a first parameter of the corresponding filter and set a second parameter for the corresponding filter on a basis of a result of the filtering;
- and
- a third filtering unit configured to filter the input signal with use of the second parameter set for the corresponding filter,
- the second determining unit being configured to carry out
- a task of determining, on the basis of the result of the filtering, whether a type of signal which type corresponds to the corresponding filter has been filtered out;
- a task of, in a case where the determining shows that the type of signal which type corresponds to the corresponding filter has been filtered out, setting the first parameter of the corresponding filter as the second parameter;
- and
- a task of, in a case where the determining shows that the type of signal which type corresponds to the corresponding filter has not been filtered out, repeating a process of adjusting the first parameter of the corresponding filter and simulating a filtering result with use of the adjusted first parameter until the type of signal which type corresponds to the corresponding filter is filtered out and setting the adjusted first parameter as the second parameter.
11 more elements
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Dependencies are inferred from the claim text.