JPS59144567U - tachometer - Google Patents
tachometerInfo
- Publication number
- JPS59144567U JPS59144567U JP4033583U JP4033583U JPS59144567U JP S59144567 U JPS59144567 U JP S59144567U JP 4033583 U JP4033583 U JP 4033583U JP 4033583 U JP4033583 U JP 4033583U JP S59144567 U JPS59144567 U JP S59144567U
- Authority
- JP
- Japan
- Prior art keywords
- sine
- voltage
- cosine
- signal
- frequency
- 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
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は従来の回転数計を示すブロック図、第２図Ａは
入力検知信号の波形例を示す図、第２図Ｂは入力検知信
号を波形整形した出力波形を示す図、第３図Ａ〜第３図
りは第１図の動作の説明に供するための各部の特性歯、
第４図は回転数計の指示面の一例を示す図、第５図はこ
の考案による回転数計の一例を示すブロック図、第６図
は第５図中のゼロ戻り回路５４の具体例を示す回路図で
ある。
１１：検知信号源、１７：入力端子、１８二波形整形回
路、１９：周波数電圧変換回路、２１：正弦・余弦電流
発生回路、２９：交差コイル形指示器、１４：電源スィ
ッチ、１５：電源、３５：遅延手段、５４：ゼロ戻り回
路。
ｆｒ−−、−コ＼ −−□−−−−５８”ｌ ｒ−
門Figure 1 is a block diagram showing a conventional rotation speed meter, Figure 2A is a diagram showing an example of the waveform of an input detection signal, Figure 2B is a diagram showing an output waveform obtained by shaping the input detection signal, and Figure 3. A to 3rd diagrams show the characteristic teeth of each part to explain the operation of Figure 1,
FIG. 4 is a diagram showing an example of an indication surface of a tachometer, FIG. 5 is a block diagram showing an example of a tachometer according to this invention, and FIG. 6 is a specific example of the zero return circuit 54 in FIG. FIG. 11: detection signal source, 17: input terminal, 18 two-waveform shaping circuit, 19: frequency voltage conversion circuit, 21: sine/cosine current generation circuit, 29: crossed coil type indicator, 14: power switch, 15: power supply, 35: Delay means, 54: Zero return circuit. fr--, -ko\ --□----58"l r-
gate
Claims (1)
号が入力され、その検知信号を、その周波数に対応した
電圧値の電圧信号に変換する周波数電圧変換回路と、 その周波数電圧変換回路の出力側に接続され、入力され
る上記電圧信号の最小電圧値から最大電圧値までの範囲
を、１周期に対応させて入力された電圧信号の電圧値に
対応したはＳ゛正弦値の正弦電流信号及び余弦値と対応
したはり余弦値の余弦電流信号をそれぞれ発生する正弦
・余弦電流発生′ 回路と、 その正弦・余弦電流発生回路の出力側と接続され、軸心
が互にはＳ゛直交、かつ上記正弦電流信号及び余弦電流
信号がそれぞれ供給される第１、゛第２コイル、これら
第１、第２コイルにそれぞ、れ流れる電流にもとすき発
生する磁界の合成磁界内に回動自在に配された回転磁石
、その回転磁石の軸上に取付けられた指針、その指針の
回動角位置、 を回転数として表示する文字板よ
りなる交差コイル形指針器と、 上記周波数電圧変換回路及び上記正弦・余弦電流信号発
生回路と電源との間に挿入され、これら回路に対する動
作電圧の印加が遮断された時にその遮断がこれら回路の
電源端子に達するのを遅延させる遅延手段と、 上記電源の電圧が所定値以下になるのを検出する比較器
と、その検出出力により、上記正弦・余弦電流発生回路
の入力を低下させるレベル低下手段とよりなるゼロ戻り
回路とを具備する回転数計。[Claims for Utility Model Registration] A frequency-voltage conversion circuit that receives a detection signal of a frequency corresponding to the rotational speed to be measured from a detection signal source and converts the detection signal into a voltage signal of a voltage value corresponding to the frequency. , is connected to the output side of the frequency-voltage conversion circuit, and corresponds to the voltage value of the input voltage signal by making the range from the minimum voltage value to the maximum voltage value of the input voltage signal correspond to one cycle. A sine/cosine current generation circuit that generates a sine current signal with a sine value and a cosine current signal with a beam cosine value corresponding to the cosine value is connected to the output side of the sine/cosine current generation circuit, and the shaft center are S' orthogonal to each other, and the first and second coils are supplied with the sine current signal and the cosine current signal, respectively, and a gap occurs in the current flowing through the first and second coils, respectively. A cross-coil type pointer consisting of a rotating magnet that is rotatably arranged in a composite magnetic field, a pointer mounted on the axis of the rotating magnet, and a dial that displays the rotational angle position of the pointer as the number of revolutions. and the frequency-voltage conversion circuit, the sine/cosine current signal generation circuit, and the power supply, and prevents the interruption from reaching the power supply terminals of these circuits when the application of the operating voltage to these circuits is interrupted. a zero return circuit comprising: a delay means for delaying; a comparator for detecting when the voltage of the power supply becomes below a predetermined value; and a level reduction means for lowering the input of the sine/cosine current generating circuit using the detection output thereof. A tachometer equipped with.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4033583U JPS59144567U (en) | 1983-03-18 | 1983-03-18 | tachometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4033583U JPS59144567U (en) | 1983-03-18 | 1983-03-18 | tachometer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59144567U true JPS59144567U (en) | 1984-09-27 |
| JPH0416226Y2 JPH0416226Y2 (en) | 1992-04-10 |
Family
ID=30170957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4033583U Granted JPS59144567U (en) | 1983-03-18 | 1983-03-18 | tachometer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59144567U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54158675U (en) * | 1978-04-26 | 1979-11-06 | ||
| JPS5837566U (en) * | 1981-09-04 | 1983-03-11 | 株式会社盛岡計器製作所 | marine speedometer |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5837566B2 (en) * | 1974-02-15 | 1983-08-17 | 沖電気工業株式会社 | drawing device |
-
1983
- 1983-03-18 JP JP4033583U patent/JPS59144567U/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54158675U (en) * | 1978-04-26 | 1979-11-06 | ||
| JPS5837566U (en) * | 1981-09-04 | 1983-03-11 | 株式会社盛岡計器製作所 | marine speedometer |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0416226Y2 (en) | 1992-04-10 |
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