JPS55149021A - Discriminating device for sound to be measured - Google Patents
Discriminating device for sound to be measuredInfo
- Publication number
- JPS55149021A JPS55149021A JP5846579A JP5846579A JPS55149021A JP S55149021 A JPS55149021 A JP S55149021A JP 5846579 A JP5846579 A JP 5846579A JP 5846579 A JP5846579 A JP 5846579A JP S55149021 A JPS55149021 A JP S55149021A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- multiplying
- way
- dividing
- measured
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
PURPOSE: To discriminate and detect abnormal sound with good accuracy by multiplying and dividing the output signals of the respective detectors which detect disturbing noise and the sound generated from the object to be measured respectively.
CONSTITUTION: Factory noises are input to a multiplying-dividing circuit 10 by way of a microphone 2, analog delay circuit 9, etc. On the other hand, the sound generated from the object to be measured is input to the multiplying-dividing circuit 10 by way of a microphone 3, etc. When both inputs thereof are of the same level, the multiplying-dividing circuit 10 outputs their product and when the levels of both inputs vary, it makes level correction and outputs their product. These are then supplied to a sum average circuit 13 by way of a positive value average circuit 11 and negative value average circuit 12 respectively. Thence, in a decision circuit 16, the output levels of the average circuits 11, 12, 13 are discriminated and further logic operations are accomplished, whereby the presence or not of any abnormal noise and the cause for the same are decided. Since in this way no influences are given to the discrimination even if disturbing noises become large, the abnormal noise may be discriminated and detected with good accuracy.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5846579A JPS55149021A (en) | 1979-05-10 | 1979-05-10 | Discriminating device for sound to be measured |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5846579A JPS55149021A (en) | 1979-05-10 | 1979-05-10 | Discriminating device for sound to be measured |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55149021A true JPS55149021A (en) | 1980-11-20 |
| JPS6255605B2 JPS6255605B2 (en) | 1987-11-20 |
Family
ID=13085170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5846579A Granted JPS55149021A (en) | 1979-05-10 | 1979-05-10 | Discriminating device for sound to be measured |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55149021A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH068341U (en) * | 1992-06-30 | 1994-02-01 | 三菱油化株式会社 | Packaging bag overturning device |
| JPH095154A (en) * | 1995-06-22 | 1997-01-10 | Nkk Corp | Adaptive type directional sound detector |
| JPH11196493A (en) * | 1997-12-30 | 1999-07-21 | Honda Electron Co Ltd | Cavitation detection method and microphone with acoustic filter |
| JP2010096547A (en) * | 2008-10-14 | 2010-04-30 | Nissan Motor Co Ltd | Device and method for determining abnormal noise |
| JP2014222150A (en) * | 2013-05-13 | 2014-11-27 | Ｎｅｃプラットフォームズ株式会社 | Electric component monitoring apparatus and electric component monitoring method |
-
1979
- 1979-05-10 JP JP5846579A patent/JPS55149021A/en active Granted
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH068341U (en) * | 1992-06-30 | 1994-02-01 | 三菱油化株式会社 | Packaging bag overturning device |
| JPH095154A (en) * | 1995-06-22 | 1997-01-10 | Nkk Corp | Adaptive type directional sound detector |
| JPH11196493A (en) * | 1997-12-30 | 1999-07-21 | Honda Electron Co Ltd | Cavitation detection method and microphone with acoustic filter |
| JP2010096547A (en) * | 2008-10-14 | 2010-04-30 | Nissan Motor Co Ltd | Device and method for determining abnormal noise |
| JP2014222150A (en) * | 2013-05-13 | 2014-11-27 | Ｎｅｃプラットフォームズ株式会社 | Electric component monitoring apparatus and electric component monitoring method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6255605B2 (en) | 1987-11-20 |
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