JPS63188571U - - Google Patents
Info
- Publication number
- JPS63188571U JPS63188571U JP8156387U JP8156387U JPS63188571U JP S63188571 U JPS63188571 U JP S63188571U JP 8156387 U JP8156387 U JP 8156387U JP 8156387 U JP8156387 U JP 8156387U JP S63188571 U JPS63188571 U JP S63188571U
- Authority
- JP
- Japan
- Prior art keywords
- comparison
- frequency component
- specific frequency
- circuit
- input signal
- 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.)
- Pending
Links
- 239000000284 extract Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000012935 Averaging Methods 0.000 description 1
Landscapes
- Measuring Frequencies, Analyzing Spectra (AREA)
Description
第1図は、この考案の特定周波数成分判別装置
の一実施例を示す回路構成図、第2図は、第1図
に示した回路各部の信号波形図、第3図は、従来
の特定周波数成分判別装置の一例を示す回路構成
図である。
3……帯域波回路、4……直流変換回路、5
……比較回路、11……特定周波数成分判別装置
、12……絶対値平均回路、13……線形変換回
路。
Fig. 1 is a circuit configuration diagram showing an embodiment of the specific frequency component discrimination device of this invention, Fig. 2 is a signal waveform diagram of each part of the circuit shown in Fig. 1, and Fig. 3 is a conventional specific frequency component discrimination device. FIG. 2 is a circuit configuration diagram showing an example of a component discrimination device. 3...Band wave circuit, 4...DC conversion circuit, 5
... Comparison circuit, 11 ... Specific frequency component discrimination device, 12 ... Absolute value averaging circuit, 13 ... Linear conversion circuit.
Claims (1)
帯域波回路と、この帯域波回路が抽出した特
定周波数成分を入力とし、所定の比較基準を越え
る入力に対して特定周波数成分判別信号を出力す
る比較回路と、この比較回路の比較基準を、前記
入力信号の振幅レベルにほぼ比例するごとく可変
する比較基準可変手段からなる特定周波数成分判
別装置。 A band wave circuit that extracts a specific frequency component included in an input signal, and a comparison circuit that receives the specific frequency component extracted by this band wave circuit as an input and outputs a specific frequency component discrimination signal for inputs that exceed a predetermined comparison standard. and a comparison reference variable means for varying the comparison reference of the comparison circuit so as to be substantially proportional to the amplitude level of the input signal.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8156387U JPS63188571U (en) | 1987-05-28 | 1987-05-28 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8156387U JPS63188571U (en) | 1987-05-28 | 1987-05-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS63188571U true JPS63188571U (en) | 1988-12-02 |
Family
ID=30933419
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8156387U Pending JPS63188571U (en) | 1987-05-28 | 1987-05-28 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS63188571U (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57200826A (en) * | 1981-06-05 | 1982-12-09 | Japan Electronic Control Syst Co Ltd | Knocking detecting device |
JPS5828646A (en) * | 1981-08-14 | 1983-02-19 | Nissan Motor Co Ltd | Knocking detector |
-
1987
- 1987-05-28 JP JP8156387U patent/JPS63188571U/ja active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57200826A (en) * | 1981-06-05 | 1982-12-09 | Japan Electronic Control Syst Co Ltd | Knocking detecting device |
JPS5828646A (en) * | 1981-08-14 | 1983-02-19 | Nissan Motor Co Ltd | Knocking detector |