US 10,644,676 B2Granted

Automatic filtering method and device

AssigneeOMRON Corporation

InventorsHao Zhang, Haibin Yu, Liangyong Duan, Lei Xu

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Abstract

An automatic filtering method includes: a step of analyzing an input signal so as to obtain a frequency spectrum of the input signal; 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 step of selecting includes determining, on the basis of the frequency spectrum of, a signal type in the input signal; selecting, on a basis of the signal type, 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 method may ensure a filtering effect against noise.

Claims7

Dependent claims

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

Dependencies are inferred from the claim text.

Facts

Application: 16/465,761Filed 26 Oct 2017
Priority: CN 2016 1 115858615 Dec 2016
Published: US 2019/0319608 A117 Oct 2019
Granted: 5 May 2020
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

G01D 3/032
Mitigating undesired influences, e.g. temperature, pressure: affecting incoming signal, e.g. by averaging; gating undesired signals
H03H 17/025
Filters characterised by a particular frequency response or filtering method: notch filters
G01G 3/147
Circuits specially adapted therefor: involving digital counting
G01G 23/01
Auxiliary devices for weighing apparatus: testing or calibrating of weighing apparatus