JPS61120973A - Signal detection for frequency measurement - Google Patents
Signal detection for frequency measurementInfo
- Publication number
- JPS61120973A JPS61120973A JP24396884A JP24396884A JPS61120973A JP S61120973 A JPS61120973 A JP S61120973A JP 24396884 A JP24396884 A JP 24396884A JP 24396884 A JP24396884 A JP 24396884A JP S61120973 A JPS61120973 A JP S61120973A
- Authority
- JP
- Japan
- Prior art keywords
- coil
- oscillation
- circuit
- frequency
- 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
Landscapes
- Measuring Frequencies, Analyzing Spectra (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は測定器や民生機器などにおける発振口゛路の発
振周波数を測定するのに使用される信号検出方法である
。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention is a signal detection method used to measure the oscillation frequency of an oscillation circuit in measuring instruments, consumer equipment, and the like.
本発明の信号検出方法は、特に発振回路に測定端子か無
い場合とか、発振回路に測定回路の信号検出端子を接続
すると被測定回路に悪影響が生じるような場合の周波数
測定に適するものである。The signal detection method of the present invention is particularly suitable for frequency measurement when the oscillation circuit does not have a measurement terminal, or when connecting the signal detection terminal of the measurement circuit to the oscillation circuit would have an adverse effect on the circuit under test.
更に本発明の信号検出方法は、発振周波数などをロボッ
トにより自動的に調整したり測定したりする場合に、第
３図に示すように信号検出素子ａをプリント基板すの裏
側から発振回路Ｃに近ずけて信号を検出するのに適する
ものである。Furthermore, in the signal detection method of the present invention, when the oscillation frequency etc. are automatically adjusted or measured by a robot, the signal detection element a is connected to the oscillation circuit C from the back side of the printed circuit board as shown in FIG. It is suitable for detecting signals at close range.
（従来の技術）
発振回路の発振周波数を測定するには従来は、測定され
る発振回路の測定端子に測定回路の信号検出端子を直接
接続し、この検出端子で検出した信号により周波数測定
を行なっていた。(Prior art) Conventionally, to measure the oscillation frequency of an oscillation circuit, a signal detection terminal of the measurement circuit is directly connected to the measurement terminal of the oscillation circuit to be measured, and the frequency is measured using the signal detected by this detection terminal. was.
（発明が解決しようとする問題点）
従来の信号検出方法は、被測定回路の測定端子に測定回
路の信号検出端子を直接接続するものであるため、発振
回路の発信周波数低下や発振停止などの悪影響を及ぼす
ことがあった。この影響は発振周波数が高くなればなる
程大きい。(Problems to be Solved by the Invention) In the conventional signal detection method, the signal detection terminal of the measurement circuit is directly connected to the measurement terminal of the circuit under test. There were some negative effects. This influence becomes greater as the oscillation frequency becomes higher.
また、測定する発振回路に測定端子が無い場合には測定
回路の信号検出端子を接続することができないため発振
周波数を正確に測定することが困難であった。Furthermore, if the oscillation circuit to be measured does not have a measurement terminal, it is difficult to accurately measure the oscillation frequency because the signal detection terminal of the measurement circuit cannot be connected.
（問題点を解決するための手段）
本発明は従来の信号検出方法の問題点を解消した信号検
出方法に関するものである。(Means for Solving the Problems) The present invention relates to a signal detection method that solves the problems of conventional signal detection methods.
本発明は発振回路１のコイルＬ１の近くに、測定回路２
の信号検出用のピックアップコイルＬｐまたは八−アン
テナＡを設け、このピックアップコイルＬＰまたはアン
テナＡと発振回路１のコイルＬｌを粗結合させて発振回
路１から誘導信号を検出し、この検出信号を周波数測定
のための信号とするようにしたものである。The present invention provides a measuring circuit 2 near the coil L1 of the oscillation circuit 1.
A pick-up coil Lp or eight-antenna A is provided for signal detection, and the pick-up coil LP or antenna A and the coil Ll of the oscillation circuit 1 are loosely coupled to detect an induced signal from the oscillation circuit 1, and this detection signal is converted into a frequency This signal is used as a signal for measurement.
（作 用）
第１図において、発振回路１のコイルＬ１と信号検出用
のピックアップコイルＬｐは粗結合されて、ピックアッ
プコイルＬｐに電流が誘導され、それが測定回路２の増
幅器３で増幅されて周波数測定機４に導びかれ、そこで
周波数測定が行なわれる。(Function) In FIG. 1, the coil L1 of the oscillation circuit 1 and the pickup coil Lp for signal detection are loosely coupled, and a current is induced in the pickup coil Lp, which is amplified by the amplifier 3 of the measurement circuit 2. The signal is guided to a frequency measuring device 4, where the frequency is measured.
（実施例）
ピックアップコイルＬｐは発振周波数ｆの高低にかかわ
らず使用可能であるが、発振周波数が低い場合はピック
アップコイルＬｐでないと誘導信号を検出しにくいため
、バーアンテナＡは高周波慴域での信号検出にだけ使用
するのが望ましい。(Example) The pick-up coil Lp can be used regardless of whether the oscillation frequency f is high or low, but when the oscillation frequency is low, it is difficult to detect the induced signal without the pick-up coil Lp. It is desirable to use it only for signal detection.
（発明の効果） 本発明の信号検出方法は以下のような効果を有する。(Effect of the invention) The signal detection method of the present invention has the following effects.
（１）測定回路２のピックアップコイルＬＰやバーアン
テナＡを発振回路ｌの発振コイルＬ１に直接接続する必
要がないため、発振回路１に測定端子が無い場合でも測
定信号を検出することができる。また、発振回路１に測
定端子があってもそこにピックアップコイルＬＰやバー
アンテナＡを接続すると発振回路の発信周波数低下や発
振停止などの悪影響が及ぶような場合でも、そのような
影響が一切生じないように測定すごとができる。(1) Since it is not necessary to directly connect the pickup coil LP and bar antenna A of the measurement circuit 2 to the oscillation coil L1 of the oscillation circuit 1, the measurement signal can be detected even when the oscillation circuit 1 does not have a measurement terminal. Furthermore, even if the oscillation circuit 1 has a measurement terminal, connecting the pickup coil LP or bar antenna A thereto would have an adverse effect such as lowering the oscillation frequency of the oscillation circuit or stopping oscillation, such effects will not occur at all. Measurements can be made to ensure that there are no errors.
（２）発信周波数低下や発振停止などが生じないため正
確な測定ができる。(2) Accurate measurements can be made because oscillation frequency does not drop or oscillation stops.
（３）ラジオ受信機などの局部発振回路の調整は従来は
トラ−２キングスコープにより行なわれていたが、本発
明の方法によれば周波数カウンタの使用が可能となるた
め自動計測、自動調整などにも利用できる。また受信周
波数への同調調整作業も迅速に行なうことができる。(3) Adjustment of local oscillation circuits such as radio receivers was conventionally performed using a tracking scope, but the method of the present invention allows the use of a frequency counter, so automatic measurement, automatic adjustment, etc. It can also be used for Further, tuning adjustment work to the reception frequency can be quickly performed.
（４）測定回路２のピックアップコイルＬｐやバーアン
テナＡを発振回路ｌの発振コイルＬ＋に接続する必要が
ないため、ロボットにより自動的に調整したり測定した
りする場合使用するのに適する。しかも第３図に示すよ
うに信号検出素子ａをプリント基板すの裏側から発振回
路Ｃに近ずけて信号検出するのに特に適する。(4) Since it is not necessary to connect the pickup coil Lp of the measurement circuit 2 and the bar antenna A to the oscillation coil L+ of the oscillation circuit 1, it is suitable for use when automatically adjusting or measuring by a robot. Moreover, as shown in FIG. 3, it is particularly suitable for detecting signals by bringing the signal detection element a close to the oscillation circuit C from the back side of the printed circuit board.
第１図は本発明の第１実施例を示すブロック説明図、第
２図は第２実施例を示すブロック説明図、第３図は本発
明の使用説明図である。
Ｌｌは発振コイル
ＬＰはピックアップコイル
Ａはバーアンテナ
第 １ｒＸｉ
第２肉
第３図FIG. 1 is a block explanatory diagram showing a first embodiment of the present invention, FIG. 2 is a block explanatory diagram showing a second embodiment, and FIG. 3 is an explanatory diagram of how the present invention is used. Ll is the oscillation coil LP is the pickup coil A is the bar antenna 1rXi 2nd meat Figure 3
Claims (1)
ックアップコイルまたはバーアンテナを設け、このコイ
ルまたはアンテナと発振回路を粗結合させて発振回路か
ら誘導信号を検出し、この信号を周波数測定のための信
号とするようにしたことを特徴とする周波数測定におけ
る信号検出方法。A pickup coil or bar antenna for signal detection of the measurement circuit is installed near the coil of the oscillation circuit, and this coil or antenna is loosely coupled to the oscillation circuit to detect the induced signal from the oscillation circuit, and this signal is used for frequency measurement. 1. A signal detection method in frequency measurement, characterized in that the signal is used as a signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24396884A JPS61120973A (en) | 1984-11-19 | 1984-11-19 | Signal detection for frequency measurement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24396884A JPS61120973A (en) | 1984-11-19 | 1984-11-19 | Signal detection for frequency measurement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61120973A true JPS61120973A (en) | 1986-06-09 |
Family
ID=17111724
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24396884A Pending JPS61120973A (en) | 1984-11-19 | 1984-11-19 | Signal detection for frequency measurement |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61120973A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103105531A (en) * | 2013-01-18 | 2013-05-15 | 东南大学 | Micro electro-mechanical online microwave frequency detector and detecting method thereof |
| CN103941089A (en) * | 2014-04-15 | 2014-07-23 | 南京邮电大学 | Method for estimating sinusoidal signal frequency based on DFT |
-
1984
- 1984-11-19 JP JP24396884A patent/JPS61120973A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103105531A (en) * | 2013-01-18 | 2013-05-15 | 东南大学 | Micro electro-mechanical online microwave frequency detector and detecting method thereof |
| CN103105531B (en) * | 2013-01-18 | 2015-09-30 | 东南大学 | The online microwave frequency detector of microelectron-mechanical and detection method thereof |
| CN103941089A (en) * | 2014-04-15 | 2014-07-23 | 南京邮电大学 | Method for estimating sinusoidal signal frequency based on DFT |
| CN103941089B (en) * | 2014-04-15 | 2016-08-31 | 南京邮电大学 | Sinusoidal signal frequency method of estimation based on DFT |
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