JPS63102325U - - Google Patents
Info
- Publication number
- JPS63102325U JPS63102325U JP19685386U JP19685386U JPS63102325U JP S63102325 U JPS63102325 U JP S63102325U JP 19685386 U JP19685386 U JP 19685386U JP 19685386 U JP19685386 U JP 19685386U JP S63102325 U JPS63102325 U JP S63102325U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- zero
- counting
- comparator
- rectified
- 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
- 238000001514 detection method Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Measuring Frequencies, Analyzing Spectra (AREA)
- Measurement Of Current Or Voltage (AREA)
- Manipulation Of Pulses (AREA)
Description
第１図はこの考案の一実施例を示すゼロクロス
点検出装置の構成を説明する回路図、第２図は第
１図に示した整流信号とコンパレータから出力さ
れるパルス信号との関係を説明する信号タイミン
グチヤート、第３図はこの考案によるゼロクロス
処理動作手順を説明するフローチヤート、第４図
は従来のゼロクロス検出回路の一例を示す回路構
成図である。
図中、１はマイクロコンピユータ、２はダイオ
ード、４はコンパレータ、１１はＡＣ電源、１３
はダイオードブリツジである。
Fig. 1 is a circuit diagram explaining the configuration of a zero-crossing point detection device showing an embodiment of this invention, and Fig. 2 explains the relationship between the rectified signal shown in Fig. 1 and the pulse signal output from the comparator. A signal timing chart, FIG. 3 is a flowchart illustrating a zero-cross processing operation procedure according to this invention, and FIG. 4 is a circuit configuration diagram showing an example of a conventional zero-cross detection circuit. In the figure, 1 is a microcomputer, 2 is a diode, 4 is a comparator, 11 is an AC power supply, 13
is a diode bridge.
Claims (1)
流する整流手段と、この整流手段により整流され
た整流信号を所定の参照電位と比較して所定電位
のパルス信号を発生させるコンパレータと、この
コンパレータから順次出力される前記パルス信号
の信号周期を外部割り込み処理でカウントする第
１のカウント手段と、この第１のカウント手段に
よりカウントされたカウント値から前記コンパレ
ータに入力された整流信号に対応するゼロクロス
幅を演算する演算手段と、この演算手段により演
算されたゼロクロス幅を前記コンパレータから順
次出力されるパルス信号に同期してカウントする
第２のカウント手段とを具備したことを特徴とす
るゼロクロス点検出装置。 (2) 第２のカウント手段によるカウント終了毎
に、所定のタイマ割り込み処理を実行することを
特徴とする実用新案登録請求の範囲第１項記載の
ゼロクロス点検出装置。[Claims for Utility Model Registration] (1) A rectifier for half-wave rectifying an AC signal input from an AC power source, and a pulse of a predetermined potential by comparing the rectified signal rectified by the rectifier with a predetermined reference potential. a comparator that generates a signal; a first counting means that counts the signal period of the pulse signal sequentially output from the comparator by external interrupt processing; Comprising a calculation means for calculating a zero-cross width corresponding to the input rectified signal, and a second counting means for counting the zero-cross width calculated by the calculation means in synchronization with pulse signals sequentially output from the comparator. A zero-crossing point detection device characterized by: (2) The zero-crossing point detection device according to claim 1, characterized in that a predetermined timer interrupt process is executed every time the second counting unit finishes counting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19685386U JPS63102325U (en) | 1986-12-23 | 1986-12-23 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19685386U JPS63102325U (en) | 1986-12-23 | 1986-12-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63102325U true JPS63102325U (en) | 1988-07-04 |
Family
ID=31156041
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19685386U Pending JPS63102325U (en) | 1986-12-23 | 1986-12-23 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63102325U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010203912A (en) * | 2009-03-03 | 2010-09-16 | Yamatake Corp | State detection device |
| JP2013029417A (en) * | 2011-07-28 | 2013-02-07 | Brother Ind Ltd | Zero-cross detection circuit and image forming device including the same |
| JP2013036885A (en) * | 2011-08-09 | 2013-02-21 | Brother Ind Ltd | Circuit for detecting ac voltage, and image forming device having the same |
-
1986
- 1986-12-23 JP JP19685386U patent/JPS63102325U/ja active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010203912A (en) * | 2009-03-03 | 2010-09-16 | Yamatake Corp | State detection device |
| JP2013029417A (en) * | 2011-07-28 | 2013-02-07 | Brother Ind Ltd | Zero-cross detection circuit and image forming device including the same |
| US8912468B2 (en) | 2011-07-28 | 2014-12-16 | Brother Kogyo Kabushiki Kaisha | Zero-crossing detector circuit and image forming apparatus having the same |
| JP2013036885A (en) * | 2011-08-09 | 2013-02-21 | Brother Ind Ltd | Circuit for detecting ac voltage, and image forming device having the same |
| US9151784B2 (en) | 2011-08-09 | 2015-10-06 | Brother Kogyo Kabushiki Kaisha | AC voltage detecting circuit and image forming apparatus having the same |
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