JPS58218206A - Trouble detection system applied to device provided with modulating function - Google Patents
Trouble detection system applied to device provided with modulating functionInfo
- Publication number
- JPS58218206A JPS58218206A JP10039982A JP10039982A JPS58218206A JP S58218206 A JPS58218206 A JP S58218206A JP 10039982 A JP10039982 A JP 10039982A JP 10039982 A JP10039982 A JP 10039982A JP S58218206 A JPS58218206 A JP S58218206A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- circuit
- band
- modulated
- center frequencies
- 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
Abstract
Description
【発明の詳細な説明】
調機能を有する装置に適用される障害検出方式に関する
。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a failure detection method applied to a device having a control function.
この種,、従来の障害検出方式は,第1図の例に見られ
るように,入力端子1と出力端子3を有する変調回路2
に適用され,信号検出回路4,判定回路5および表示器
6によシ構成されている。入力端子1よシ加えられた信
号は,変調回路2で変調されたのち,出力端子3から変
調された搬送波として出力される。一方,変調された搬
送波の一部は信号検出回路4に導かれ,ここで、変調信
号のスペクトラムの如伺にかかわらず,総合電力に比例
する信うとして検出される。信号検出回路4で検出され
た信号は,判定回路5に導びかれて“、もし、総合電力
が低下した場合に,変調回路2の出力に異常を生じたも
のと判定し,これを表示器6で表示する。このような方
法によれば,変調回路の出力における総合電力の低下に
対して判定回路は正しい判定を行うが,変調回路の論理
系および変調機能の部一分的な異常の場合には,スペク
トラム状態は変化するものの総合電力の低下を生じない
ために,判定回路は正しい判定ができない,このように
、従来の方式においては,変調回路のあらゆる異常状態
を正しく判定できないという欠点があった。This type of conventional fault detection method is based on a modulation circuit 2 having an input terminal 1 and an output terminal 3, as shown in the example of FIG.
The present invention is applied to a signal detection circuit 4, a determination circuit 5, and a display 6. A signal applied to input terminal 1 is modulated by modulation circuit 2 and then output from output terminal 3 as a modulated carrier wave. On the other hand, a part of the modulated carrier wave is guided to the signal detection circuit 4, where it is detected as being proportional to the total power, regardless of the spectrum of the modulated signal. The signal detected by the signal detection circuit 4 is guided to the determination circuit 5, and if the total power decreases, it is determined that an abnormality has occurred in the output of the modulation circuit 2, and this is displayed on the display. 6. According to such a method, the judgment circuit makes a correct judgment regarding the decrease in the total power in the output of the modulation circuit, but the judgment circuit makes a correct judgment regarding the decrease in the total power in the output of the modulation circuit. In this case, the spectrum state changes but the total power does not decrease, so the judgment circuit cannot make a correct judgment.In this way, the conventional method has the disadvantage of not being able to correctly judge all abnormal states of the modulation circuit. was there.
本発明の目的は,上記従来の欠点を除去し,使用される
変調回路のどのような異常をも正確に検出することので
きる変調機能を有する装置に適用される障害検出方式を
提供するにある。An object of the present invention is to eliminate the above-mentioned conventional drawbacks and to provide a fault detection method applied to a device having a modulation function that can accurately detect any abnormality in the modulation circuit used. .
本発明によれば、変調された搬送波電力を、中心周波数
の異なる少なくとも3つの狭帯域ろ波器によシ帯域制限
したのち、それぞれ検出し、比較判定器によシこれ等の
検出レベルを相互に比較することによって、前記搬送波
電力のスペクトラム密度およびレベルの低下を判別する
ようにしたことを特徴とする変調機能を有する装置に適
用される障害検出方式が得られる。According to the present invention, the modulated carrier wave power is band-limited by at least three narrowband filters having different center frequencies, and then each is detected, and the detection levels of these filters are compared to each other by a comparison judge. A fault detection method applied to a device having a modulation function is obtained, which is characterized in that a decrease in the spectral density and level of the carrier wave power is determined by comparing the above.
次に2本発明による障害検出方式について図面を参照し
て説明する。Next, two failure detection methods according to the present invention will be explained with reference to the drawings.
第2図は本発明による実施例の構成をブロック図により
示したものである。図において、変調回路2.信号入力
端子1および信号出力端子3は第:;
1図の例と同じものが用い、IF’llれる。そして、
変調回路2の出力側には、狭帯域ろ波器11−1〜3゜
信号検出回路12−1〜31判定回路13および表示器
14が順に接続されている。各狭帯域ろ波■l、■2.
v3で表わす。いま、入力端子1より信号が入力し、変
調回路2で変調されたのち、出力端子3より変調された
搬送波として出力される。FIG. 2 is a block diagram showing the configuration of an embodiment according to the present invention. In the figure, modulation circuit 2. The signal input terminal 1 and the signal output terminal 3 are the same as in the example of FIG. and,
On the output side of the modulation circuit 2, narrowband filters 11-1 to 3° signal detection circuits 12-1 to 31, a determination circuit 13, and a display 14 are connected in order. Each narrow band filter ■l, ■2.
It is expressed as v3. Now, a signal is inputted from an input terminal 1, modulated by a modulation circuit 2, and then outputted from an output terminal 3 as a modulated carrier wave.
一方、変調された搬送波の一部は、中心周波数の異なっ
た3つの狭帯域ろ波器11−1 、11−2および11
−3に導かれ、それぞれ帯域制限を受けたのち、それぞ
れ信号検出回路12−1.12−2および12−3に入
る。各々の中心周波数ft 、f2およびf3で帯域制
限を受けたスペクトラムは。On the other hand, a part of the modulated carrier wave is filtered through three narrow band filters 11-1, 11-2 and 11 with different center frequencies.
-3, and after being band limited, enter signal detection circuits 12-1, 12-2 and 12-3, respectively. The band-limited spectrum at each center frequency ft, f2 and f3 is:
信号検出回路12−1.12−2および12−3でそれ
ぞれ検出され、各々のスペクトラムに対応したレールv
、l、v・およびV・によ・て判定回路13に送られ為
。ここで、比較され、異常の有無が判定され、キの結果
が表示器14で表示され、′:・・。The rail v detected by the signal detection circuits 12-1, 12-2 and 12-3 and corresponding to each spectrum
, l, v., and V. are sent to the determination circuit 13. Here, the comparison is made, the presence or absence of an abnormality is determined, and the result of (K) is displayed on the display 14, ':...
るO
第3図は、上記実施例において、正常状態と異 ゛
常状態との動作を対比によシ説明するためのグラフであ
る。図において、(a)は変調された信号のスペクトラ
ム状態を示し、(b)は狭帯域ろ波器11−1゜11−
2および11−3の各々の減衰特性を示し。FIG. 3 is a graph for comparing and explaining the operation in a normal state and an abnormal state in the above embodiment. In the figure, (a) shows the spectrum state of the modulated signal, and (b) shows the narrowband filter 11-1゜11-
2 and 11-3 are shown.
(c)は各々の中心周波数fr、fzおよびf3におい
て検出した時のレベルV 1 + V 2および■3
を示す。判定回路13においては、第3図(C)に見ら
れる信号検出回路12−1〜3の正常状態における検出
レベル■I + ”2 r v3をうけて、それぞ
れの値を記憶しておき、その後に変調回路2が異常が発
生すると変調された信号のスペクトラム状態が変化する
から、そのときの検出レベルVi 。(c) is the level V 1 + V 2 and ■3 when detected at each center frequency fr, fz and f3
shows. The determination circuit 13 receives the detection level ■I + "2 r v3 in the normal state of the signal detection circuits 12-1 to 12-3 shown in FIG. 3(C), stores the respective values, and then When an abnormality occurs in the modulation circuit 2, the spectrum state of the modulated signal changes, so the detection level Vi at that time.
V 2 + V 3の相対レベルを比較することによ
って異常状態の有無およびその内容を判定することがで
きる。又、検出レベル■l 、v2 、■3の絶対レベ
ルを比較すれば、総合電力の変化の有無を知ることもで
き、レベル低下に際しての異常状態が判る。By comparing the relative levels of V 2 + V 3, the presence or absence of an abnormal state and its contents can be determined. Furthermore, by comparing the absolute levels of the detection levels ■l, v2, and ■3, it is possible to know whether there is a change in the total power, and an abnormal state when the level decreases can be determined.
以上の説明によシ明らか々ように1本発明によれば、複
数個の狭帯域信号を検出比較することによって、変調さ
れた信号のスペクトラム状態を監視しているため、変調
回路に発牟するどのような異常状態も正しく判定するこ
とができるから、変調回路は勿論、その前段部を含む装
置の保守が容易に々る点において、その得られる効果は
大きい。As is clear from the above description, according to the present invention, the spectrum state of the modulated signal is monitored by detecting and comparing a plurality of narrowband signals. Since any abnormal state can be correctly determined, the present invention has a great effect in that maintenance of the apparatus including not only the modulation circuit but also its front stage is easy.
第1図は従来の障害検出方式の構成例を示すブロック図
、第2図は本発明による実施例の構成を示すブロック図
、第3図は、第2図の実施例において、正常状態と異常
状態との動作を対比によシ説明するためのグラフである
。
図において、1は信号入力端子、2は変調回路。
3は信号出力端子、 11−1 、11−2.11−3
は狭帯域ろ波器、12−1.12−2.12゜−3は信
号検出回路、13は判定回路、14は表示器である。
第3図
正常状懸
興常状幡FIG. 1 is a block diagram showing a configuration example of a conventional fault detection method, FIG. 2 is a block diagram showing a configuration of an embodiment according to the present invention, and FIG. 3 shows a normal state and an abnormal state in the embodiment of FIG. It is a graph for explaining the state and operation by comparison. In the figure, 1 is a signal input terminal, and 2 is a modulation circuit. 3 is a signal output terminal, 11-1, 11-2.11-3
12-1.12-2.12°-3 is a signal detection circuit, 13 is a determination circuit, and 14 is a display. Figure 3 Normal state of affairs
Claims (1)
くとも3つの狭帯域ろ波器によシ帯域制限したのち、そ
れぞれ検出し、比較判定器によシこれ等の検出レベルを
相互に比較することによりて、前記搬送波電力のスペク
トラム密度およびレベルの低下を判別するようにしたこ
とを特徴とする変調機能を有する装置に適用される障害
検出方式。1. After band-limiting the modulated carrier wave power using at least three narrow band filters with different center frequencies, detecting each filter, and comparing the detected levels with each other using a comparison/judgment device. A failure detection method applied to a device having a modulation function, characterized in that a decrease in the spectral density and level of the carrier wave power is determined according to the above.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10039982A JPS58218206A (en) | 1982-06-11 | 1982-06-11 | Trouble detection system applied to device provided with modulating function |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10039982A JPS58218206A (en) | 1982-06-11 | 1982-06-11 | Trouble detection system applied to device provided with modulating function |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS58218206A true JPS58218206A (en) | 1983-12-19 |
Family
ID=14272901
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10039982A Pending JPS58218206A (en) | 1982-06-11 | 1982-06-11 | Trouble detection system applied to device provided with modulating function |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS58218206A (en) |
-
1982
- 1982-06-11 JP JP10039982A patent/JPS58218206A/en active Pending
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