JP2000065876A - Electromagnetic wave generating position detection device - Google Patents
Electromagnetic wave generating position detection deviceInfo
- Publication number
- JP2000065876A JP2000065876A JP10233899A JP23389998A JP2000065876A JP 2000065876 A JP2000065876 A JP 2000065876A JP 10233899 A JP10233899 A JP 10233899A JP 23389998 A JP23389998 A JP 23389998A JP 2000065876 A JP2000065876 A JP 2000065876A
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- Prior art keywords
- electromagnetic wave
- measurement
- antenna
- level
- frequency
- Prior art date
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- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、電磁波の発生の有
無、及び、電磁波の発生位置を検出する装置に関するも
のである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for detecting the presence / absence of generation of an electromagnetic wave and the position where the electromagnetic wave is generated.
【０００２】[0002]
【従来の技術】変電所などに隣接する民家では、電力機
器及びその周辺機器より発する電磁波により、テレビの
受信が妨げられることがあり、変電所などでは改善を迫
られている。電力機器及びその周辺機器が正常であれ
ば、テレビの受信の妨げとなるような電磁波は出にくい
が、異常が発生すると、大きな電磁波が発生する。例え
ば、機器が故障した場合、高電圧部に近い安全柵等が接
地されていない場合、或いは、接続不良が生じてフロー
ト状態が発生した場合などの異常が発生したときは、大
きな電磁波が発生する。2. Description of the Related Art In a private house adjacent to a substation or the like, electromagnetic waves emitted from power equipment and its peripheral equipment may obstruct reception of a television, and improvement is required at a substation and the like. If the power device and its peripheral devices are normal, electromagnetic waves that hinder television reception are unlikely to be emitted, but if an abnormality occurs, large electromagnetic waves are generated. For example, when an abnormality occurs, such as when a device breaks down, when a safety fence or the like near a high-voltage section is not grounded, or when a fault occurs, such as when a connection failure occurs and a floating state occurs, a large electromagnetic wave is generated. .
【０００３】これらの、機器の異常、機器周辺の接触不
良などは、目視では判別できない。したがって、このよ
うな異常電磁波の有無を調べ、異常電磁波が発生してい
る場合にその発生箇所を調べるために、ＡＭ／ＦＭラジ
オ又はハンディーのスペアなどの受信機器が使用され
る。作業員は、受信機を手に持って、変電所内を歩き回
り、異常電磁波を検出した場合には、強く受信する箇所
を探して電磁波の発生箇所を特定する。[0003] These abnormalities of the equipment and poor contact around the equipment cannot be visually discriminated. Therefore, a receiving device such as an AM / FM radio or a handy spare is used to check for the presence or absence of such an abnormal electromagnetic wave and, when the abnormal electromagnetic wave is generated, to check the location where the abnormal electromagnetic wave is generated. The worker walks around the substation with the receiver in hand, and when an abnormal electromagnetic wave is detected, searches for a strong reception location and specifies a location where the electromagnetic wave is generated.
【０００４】[0004]
【発明が解決しようとする課題】変電所などでは広い場
所に多種の機器が配置されているため、種々な機器から
発せられる様々な電磁波が存在する。また，変電所には
外来の外部ノイズによる電磁波も存在する。したがっ
て、上記従来の検出手段では、異常電磁波の発生源を容
易に特定することができない。また、周囲の温度、湿
度、風、日射の変化などにより電磁波の発生の有無、発
生強度及び発生周波数が変化する。したがって、上述の
一時的な観測を行うだけでは、その時に電磁波が出てい
ない場合などがあるので、発生の有無及び発生箇所の特
定が困難になる。In a substation or the like, since various types of equipment are arranged in a wide place, there are various electromagnetic waves emitted from various types of equipment. In addition, electromagnetic waves due to extraneous external noise also exist in substations. Therefore, the above-mentioned conventional detecting means cannot easily specify the source of the abnormal electromagnetic wave. In addition, the presence / absence, generation intensity, and generation frequency of electromagnetic waves change due to changes in ambient temperature, humidity, wind, solar radiation, and the like. Therefore, if only the above-mentioned temporary observation is performed, there is a case where the electromagnetic wave is not emitted at that time, so that it is difficult to specify the presence or absence and the location of the occurrence.
【０００５】本発明は、外部ノイズに影響されず、電磁
波の発生の有無の判定及び発生箇所の特定が連続的に可
能な電磁波発生位置検出装置を得ることを目的とするも
のである。SUMMARY OF THE INVENTION It is an object of the present invention to provide an electromagnetic wave generation position detecting device which can continuously determine the presence or absence of an electromagnetic wave and specify the generation position without being affected by external noise.
【０００６】[0006]
【課題を解決するための手段】本発明は、上記目的を達
成するためなされたものである。本発明は、複数の電磁
波計測アンテナと、外部ノイズ検出アンテナと、前記外
部ノイズ検出アンテナにより検出した信号のレベルが所
定値以下の複数の周波数ポイントを計測周波数として選
択する手段と、前記複数の電磁波計測用アンテナが検出
した信号について、前記複数の計測周波数における信号
のレベルを検出する手段と、前記電磁波計測アンテナが
検出した信号レベルに基づいて電磁波の発生の有無を判
定する手段と、前記複数の電磁波計測アンテナが検出し
た信号のレベルを比較することにより、電磁波の発生位
置を特定する手段と、から電磁波発生位置検出装置を構
成する。SUMMARY OF THE INVENTION The present invention has been made to achieve the above object. The present invention provides a plurality of electromagnetic wave measurement antennas, an external noise detection antenna, means for selecting a plurality of frequency points at which the level of a signal detected by the external noise detection antenna is a predetermined value or less as a measurement frequency, and the plurality of electromagnetic wave measurement antennas. For the signal detected by the measurement antenna, means for detecting the level of the signal at the plurality of measurement frequencies, means for determining the presence or absence of generation of electromagnetic waves based on the signal level detected by the electromagnetic wave measurement antenna, the plurality of The electromagnetic wave generation position detecting device is constituted by means for comparing the level of the signal detected by the electromagnetic wave measurement antenna to specify the generation position of the electromagnetic wave.
【０００７】電磁波計測アンテナは、目的とする電磁波
の他に、種々な原因で発生する電磁波を外部ノイズとし
て検出する。ここで、電磁波障害に係わる電磁波は比較
的幅広い周波数領域に存在する。一方、外部ノイズの原
因となる他の電気機器から発生する定常ノイズは、低周
波に存在する。また、公衆放送波、無線局などが発する
外部ノイズは固有周波数に固定されている。The electromagnetic wave measuring antenna detects electromagnetic waves generated due to various causes as external noises in addition to the target electromagnetic waves. Here, electromagnetic waves related to electromagnetic wave interference exist in a relatively wide frequency range. On the other hand, stationary noise generated from other electric devices that causes external noise exists at low frequencies. External noise generated by public broadcast waves, wireless stations, and the like is fixed at a natural frequency.
【０００８】本発明は、これらの性質を利用して計測周
波数帯域を設定し、その周波数帯域内で、外部ノイズに
よる電磁波が検出されない周波数ポイントで電磁波の検
出を行う。これにより、外部ノイズの影響が排除され
て、所望の電磁波発生源から放射される電磁波のみを検
出することができる。また、電磁波計測アンテナを複数
設けたため、電磁波計測アンテナが検出した信号のレベ
ルは、電磁波発生源と電磁波計測アンテナの距離に応じ
て変化をする。したがって、各電磁波計測アンテナが検
出した信号レベルを比較することにより、電磁波発生源
の位置を特定することができる。According to the present invention, a measurement frequency band is set using these properties, and electromagnetic waves are detected at frequency points in the frequency band where electromagnetic waves due to external noise are not detected. As a result, the influence of external noise is eliminated, and only the electromagnetic waves radiated from the desired electromagnetic wave generation source can be detected. Further, since a plurality of electromagnetic wave measurement antennas are provided, the level of the signal detected by the electromagnetic wave measurement antenna changes according to the distance between the electromagnetic wave generation source and the electromagnetic wave measurement antenna. Therefore, by comparing the signal levels detected by the respective electromagnetic wave measurement antennas, the position of the electromagnetic wave generation source can be specified.
【０００９】また、遠来の外部ノイズに対しては、各電
磁波計測アンテナの検出信号レベルはほぼ等しくなる。
この性質を利用して、各電磁波計測アンテナの検出信号
レベルがほぼ等しい場合には、外部ノイズによる電磁波
が検出されたとして、発生箇所の特定を行わないことが
できる。[0009] Further, with respect to distant external noise, the detection signal levels of the respective electromagnetic wave measurement antennas are substantially equal.
By utilizing this property, when the detection signal levels of the respective electromagnetic wave measurement antennas are substantially equal, it is determined that the electromagnetic wave due to the external noise has been detected, and it is not necessary to specify the generation position.
【００１０】[0010]
【発明の実施の形態】以下、本発明の実施形態として、
変電所内で発生した異常電磁波の検出及び発生箇所の特
定をする例について説明する。図１は、電磁波発生位置
検出装置の回路構成を示す。変電所の異常電磁波の発生
を監視しようとする場所を囲んで、４つの異常電磁波計
測用の計測アンテナ３を配置する。この計測アンテナ３
の数は、通常は３〜４個を１組として設けられる。な
お、各計測アンテナ３は、全アンテナから等位置にある
ポイントに電磁波発生源が存在しないような関係に配置
される。各計測アンテナ３が検出した信号は、同軸ケー
ブル９により装置本体１１に導かれ、セレクタ４に接続
される。DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described.
An example in which an abnormal electromagnetic wave generated in a substation is detected and a generation place is specified will be described. FIG. 1 shows a circuit configuration of the electromagnetic wave generation position detecting device. Four measurement antennas 3 for measuring abnormal electromagnetic waves are arranged around a place where the generation of abnormal electromagnetic waves in the substation is to be monitored. This measurement antenna 3
Are usually provided as a set of three to four. Note that the measurement antennas 3 are arranged in such a relationship that no electromagnetic wave generation source exists at a point located at the same position from all the antennas. The signal detected by each measurement antenna 3 is guided to the apparatus main body 11 by the coaxial cable 9 and connected to the selector 4.
【００１１】セレクタ４には、更に、ノイズアンテナ１
０が同軸ケーブル９により接続される。ノイズアンテナ
１０は、周囲の電磁波状況を検出するもので、電磁波発
生源１からの電磁波２を受信しにくく、かつ、外部ノイ
ズに対して、各計測アンテナ３と同一受信条件となる場
所に配置される。セレクタ４の出力は、高周波用の増幅
器５と、時系列的に与えられる電磁波を検波するチュー
ナ６と、信号をディジタル化するアナログ／ディジタル
変換器７を通して演算処理部８へ入力される。演算処理
部８は、後述する手順に従って、セレクタ４を制御し
て、ノイズアンテナ１０の出力と、複数の計測アンテナ
３の出力を順次切り換える。The selector 4 further includes a noise antenna 1
0 is connected by a coaxial cable 9. The noise antenna 10 detects the surrounding electromagnetic wave condition, is difficult to receive the electromagnetic wave 2 from the electromagnetic wave generation source 1, and is arranged in a place where external noise has the same reception condition as each of the measurement antennas 3. You. The output of the selector 4 is input to an arithmetic processing unit 8 through an amplifier 5 for high frequency, a tuner 6 for detecting electromagnetic waves given in time series, and an analog / digital converter 7 for digitizing a signal. The arithmetic processing unit 8 controls the selector 4 to sequentially switch the output of the noise antenna 10 and the outputs of the plurality of measurement antennas 3 according to a procedure described later.
【００１２】また、演算処理部８は、チューナ６を制御
して、各アンテナ３，１０の検出信号から、複数の周波
数ポイントごとの信号を取り出す。なお、長期の監視及
び計測には、プリンタ、ＣＲＴ、ＲＡＭディスク、ハー
ドディスク、フロッピーディスクなどの機器を付加し、
電磁波の発生現象を記録するようにしても良い。演算処
理部８の動作を図２を用いて説明する。The arithmetic processing unit 8 controls the tuner 6 to extract signals at a plurality of frequency points from detection signals of the antennas 3 and 10. For long-term monitoring and measurement, add devices such as a printer, CRT, RAM disk, hard disk, floppy disk, etc.
The generation phenomenon of the electromagnetic wave may be recorded. The operation of the arithmetic processing unit 8 will be described with reference to FIG.
【００１３】参照符号２１で示すように、演算処理部８
に計測周波数帯域を設定する。計測周波数帯域の設定に
ついて説明する。一般的な電力機器及びその周辺機器が
正常時に発する電磁波は、せいぜい２００ＭＨｚ以下で
ある。また、異常時に発生する電磁波は非常に広い周波
数範囲に分布する。したがって、計測周波数帯域として
は、正常時の電磁波の影響を排除するため、３００ＭＨ
ｚ〜８００ＭＨｚに設定する。また、上記周波数範囲内
で、移動電話などで既に使用されている周波数が明確な
ものは、その周波数を計測周波数から除外する。As indicated by reference numeral 21, the arithmetic processing unit 8
Set the measurement frequency band to. The setting of the measurement frequency band will be described. An electromagnetic wave emitted by a general power device and its peripheral devices in a normal state is at most 200 MHz or less. In addition, electromagnetic waves generated during abnormal times are distributed over a very wide frequency range. Therefore, as a measurement frequency band, 300 MH
Set to z to 800 MHz. In the above-mentioned frequency range, if a frequency already used by a mobile phone or the like is clear, the frequency is excluded from the measurement frequency.
【００１４】次に、演算処理部８は、図２の参照符号２
２で示すように、ノイズのない周波数に複数の計測周波
数を設定する。具体的手法を以下に説明する。図３及び
図４は、計測アンテナ３が検出する各周波数ごとの電磁
波のレベルを示す。図３は、正常状態における電磁波レ
ベルを示し、図４は、異常電磁波発生時の電磁波レベル
を示す。Next, the arithmetic processing unit 8 is provided with the reference numeral 2 in FIG.
As shown by 2, a plurality of measurement frequencies are set to a frequency free of noise. A specific method will be described below. FIG. 3 and FIG. 4 show the levels of electromagnetic waves for each frequency detected by the measurement antenna 3. FIG. 3 shows an electromagnetic wave level in a normal state, and FIG. 4 shows an electromagnetic wave level when an abnormal electromagnetic wave is generated.
【００１５】図３において、横軸は周波数（ＭＨｚ）、
縦軸は電磁波レベル（ｄＢ）を示す。０ＭＨｚ〜１２０
０ＭＨｚの範囲にわたって存在する電磁波は、外部ノイ
ズによる電磁波である。周波数２００ＭＨｚ以下に縦線
で表される電磁波は、周辺機器から発せられる定在波電
磁波である。計測周波数は３００〜８００ＭＨｚの範囲
に設定される。In FIG. 3, the horizontal axis is frequency (MHz),
The vertical axis indicates the electromagnetic wave level (dB). 0MHz ~ 120
Electromagnetic waves existing over the range of 0 MHz are electromagnetic waves due to external noise. An electromagnetic wave represented by a vertical line at a frequency of 200 MHz or less is a standing wave electromagnetic wave emitted from a peripheral device. The measurement frequency is set in the range of 300 to 800 MHz.
【００１６】ノイズアンテナ１０が検出する信号は、図
３に示すものとなる。ここで、外部ノイズによる信号の
内、小さいレベルの外部ノイズはバックグラウンドノイ
ズ（ＢＧＮ）と呼ばれる。本例では、ＢＧＮより若干大
きなレベルにＢＧＮレベルを設定し、このＢＧＮレベル
を超えるレベルの信号を外部ノイズとして扱う。演算処
理部８は、３００〜８００ＭＨｚの計測範囲に予め１０
０点程度の周波数ポイントを設定し、セレクタ４をノイ
ズアンテナ１０に切り換えて、チューナ６により順次、
デフォルトの各周波数ポイントについて検出信号のレベ
ルを測定する。ここで、信号レベルがＢＧＮレベル以下
である場合には、その周波数ポイントを計測周波数とし
て採用する。一方、信号レベルがＢＧＮレベルを超えて
いる場合は、計測に適さないものと見做して、新たな周
波数ポイントを選択する。The signal detected by the noise antenna 10 is as shown in FIG. Here, among the signals due to the external noise, the external noise of a small level is called background noise (BGN). In this example, the BGN level is set to a level slightly larger than the BGN, and a signal having a level exceeding the BGN level is treated as external noise. The arithmetic processing unit 8 sets the 10
A frequency point of about 0 is set, the selector 4 is switched to the noise antenna 10, and the tuner 6 sequentially
Measure the level of the detection signal for each default frequency point. Here, when the signal level is equal to or lower than the BGN level, the frequency point is adopted as the measurement frequency. On the other hand, if the signal level exceeds the BGN level, it is regarded as unsuitable for measurement, and a new frequency point is selected.
【００１７】新たな周波数ポイントを選択するために
は、そのポイントの周波数ｆをわずかな周波数δｆだけ
ずらし、新たにｆ＝ｆ＋δｆとして、その周波数で再度
信号レベルを計測する。これを数回繰り返し、ノイズレ
ベルが所定の判定レベル以下になった時点でその周波数
ポイントを計測周波数ポイントとして採用する。ただ
し、５回以上繰り返してもＢＧＮレベル以下の周波数ポ
イントが見つからない場合は、その周波数ポイントは無
効とする。In order to select a new frequency point, the frequency f at that point is shifted by a small frequency δf, and the signal level is measured again at a new frequency f = f + δf. This is repeated several times, and when the noise level falls below the predetermined determination level, the frequency point is adopted as the measurement frequency point. However, if a frequency point below the BGN level is not found even after repeating five or more times, the frequency point is invalidated.
【００１８】次いで、演算処理部８は、図２の参照符号
２３で示すように、各計測アンテナ３により電磁波の検
出を行う。演算処理部８は、セレクタ４を１つの計測ア
ンテナ３に切り換えてチューナ６により、設定した計測
周波数ごとに電磁波の信号レベルを測定する。この計測
周波数は、上述のように１００点程度が選択されている
が、ノイズアンテナ１０により大きな（ＢＧＮレベルを
超える）信号を受けた周波数と、受信信号レベルが極端
に小さい値と極端に大きい値の周波数は、計測周波数と
して採用しない。Next, as shown by reference numeral 23 in FIG. 2, the arithmetic processing section 8 detects electromagnetic waves with each measurement antenna 3. The arithmetic processing unit 8 switches the selector 4 to one measurement antenna 3 and measures the signal level of the electromagnetic wave for each set measurement frequency by the tuner 6. As the measurement frequency, about 100 points are selected as described above. However, the frequency at which a large signal (exceeding the BGN level) is received by the noise antenna 10 and the value at which the received signal level is extremely small and extremely large are set. Is not adopted as the measurement frequency.
【００１９】図４は、異常電磁波発生時に計測アンテナ
３により検出される電磁波レベルを示す。図３の正常状
態で信号レベルがＢＧＮレベル以下であった複数の計測
周波数において、図４の異常時には信号レベルがＢＧＮ
レベルを超えるものが発生する。図４では、３００ＭＨ
ｚ〜８００ＭＨｚの計測用周波数範囲において、新たに
ＢＧＮレベルを超えた部分を黒く塗りつぶしている。FIG. 4 shows an electromagnetic wave level detected by the measuring antenna 3 when an abnormal electromagnetic wave is generated. At a plurality of measurement frequencies in which the signal level is equal to or lower than the BGN level in the normal state in FIG.
Something beyond the level occurs. In FIG. 4, 300 MH
In the frequency range for measurement from z to 800 MHz, the portion exceeding the BGN level is newly painted black.
【００２０】演算処理部８は、各計測アンテナ３ごと
に、上述の設定された周波数ポイントごとに信号レベル
を計測し、その結果により異常電磁波の有無を判定す
る。判定の具体例としては、検出した信号レベルがＢＧ
Ｎレベルを超えた周波数ポイントの数が所定値を超え、
また、その継続時間が所定時間を超えた場合に、異常電
磁波が発生していると判定する。The arithmetic processing unit 8 measures the signal level at each of the set frequency points for each measurement antenna 3, and determines the presence or absence of abnormal electromagnetic waves based on the result. As a specific example of the determination, the detected signal level is BG
The number of frequency points exceeding the N level exceeds a predetermined value,
If the duration exceeds a predetermined time, it is determined that an abnormal electromagnetic wave has occurred.
【００２１】あるいは、所定の周波数帯域の各周波数成
分を所定の時間マックスホールドし、識別レベルと比較
することにより、電磁波の発生の有無を判定することが
できる。また、演算処理部８は、図２の参照符号２４で
示すように、各計測アンテナ３の検出信号レベルを比較
して、異常電磁波の発生源の位置を特定する。図１を参
照すると、４つの計測アンテナ３の内、電磁波発生源１
に近い位置にあるアンテナは強いレベルの信号を受信
し、遠い位置にあるアンテナは弱いレベルの信号を受信
する。したがって、各計測アンテナ３の検出信号のレベ
ルを比較することにより、各計測アンテナ３と電磁波発
生源１の位置関係を計算することができる。Alternatively, it is possible to determine whether or not an electromagnetic wave is generated by max-holding each frequency component in a predetermined frequency band for a predetermined time and comparing it with an identification level. Further, as indicated by reference numeral 24 in FIG. 2, the arithmetic processing unit 8 compares the detection signal levels of the respective measurement antennas 3 and specifies the position of the source of the abnormal electromagnetic wave. Referring to FIG. 1, among the four measurement antennas 3, an electromagnetic wave source 1
The antenna located closer to receives the strong level signal, and the antenna located farther away receives the weak level signal. Therefore, by comparing the level of the detection signal of each measurement antenna 3, the positional relationship between each measurement antenna 3 and the electromagnetic wave generation source 1 can be calculated.
【００２２】なお、４つの計測アンテナ３の受信レベル
がほぼ等しい場合は、外部ノイズによる電磁波を検出し
ていると考えられるので、この場合は、位置の特定を一
時保留する。このため、複数の計測アンテナ３を配置す
る場合は、全アンテナから等位置に電磁波発生源が存在
しないように配置をする必要がある。以上説明した装置
によれば、異常電磁波の発生の有無及び発生箇所の特定
を連続的に行うことができる。したがって、気象条件な
どにより、異常電磁波の発生強度、発生周波数、発生の
有無が変化しても、確実に異常電磁波を検出し、その発
生位置を特定することができる。When the reception levels of the four measurement antennas 3 are substantially equal, it is considered that an electromagnetic wave due to external noise has been detected. In this case, the specification of the position is temporarily suspended. For this reason, when a plurality of measurement antennas 3 are arranged, it is necessary to arrange them so that the electromagnetic wave generation sources do not exist at the same position from all the antennas. According to the apparatus described above, the presence / absence of an abnormal electromagnetic wave and the location of the occurrence can be continuously specified. Therefore, even if the intensity, frequency and presence / absence of the occurrence of the abnormal electromagnetic wave change due to weather conditions or the like, the abnormal electromagnetic wave can be reliably detected and its generation position can be specified.
【００２３】[0023]
【発明の効果】本発明によれば、外部ノイズに影響され
ず、異常電磁波の発生の有無及び発生箇所の特定が連続
的に可能となる。According to the present invention, the presence / absence of an abnormal electromagnetic wave and the location of the occurrence can be continuously specified without being affected by external noise.
【図１】本発明を適用した電磁波発生位置検出装置の構
成を示す回路図。FIG. 1 is a circuit diagram showing a configuration of an electromagnetic wave generation position detecting device to which the present invention is applied.
【図２】図１の演算処理部の動作を示す図。FIG. 2 is a diagram showing the operation of an arithmetic processing unit in FIG. 1;
【図３】図１のアンテナが正常時に検出する電磁波のレ
ベルを示す図。FIG. 3 is a diagram showing the levels of electromagnetic waves detected when the antenna of FIG. 1 is normal.
【図４】図１のアンテナが異常電磁波発生時に検出する
電磁波のレベルを示す図。FIG. 4 is a diagram showing a level of an electromagnetic wave detected by the antenna of FIG. 1 when an abnormal electromagnetic wave is generated.
１…電磁波発生源 ２…電磁波 ３…計測アンテナ ４…セレクタ ５…増幅器 ６…チューナ ７…Ａ−Ｄ変換器 ８…演算処理部 ９…同軸ケーブル １０…ノイズアンテナ １１…装置本体 DESCRIPTION OF SYMBOLS 1 ... Electromagnetic wave generation source 2 ... Electromagnetic wave 3 ... Measurement antenna 4 ... Selector 5 ... Amplifier 6 ... Tuner 7 ... A / D converter 8 ... Operation processing unit 9 ... Coaxial cable 10 ... Noise antenna 11 ... Device body
Claims (1)
ルが所定値以下の複数の周波数ポイントを計測周波数と
して選択する手段と、 前記複数の電磁波計測用アンテナが検出した信号につい
て、前記複数の計測周波数における信号のレベルを検出
する手段と、 前記電磁波計測アンテナが検出した信号レベルに基づい
て電磁波の発生の有無を判定する手段と、 前記複数の電磁波計測アンテナが検出した信号のレベル
を比較することにより、電磁波の発生位置を特定する手
段と、 を具備することを特徴とする電磁波発生位置検出装置。A plurality of electromagnetic wave measurement antennas; an external noise detection antenna; a means for selecting a plurality of frequency points at which a level of a signal detected by the external noise detection antenna is equal to or less than a predetermined value as a measurement frequency; Means for detecting a signal level at the plurality of measurement frequencies for a signal detected by the electromagnetic wave measurement antenna; means for determining whether or not electromagnetic waves are generated based on the signal level detected by the electromagnetic wave measurement antenna; Means for specifying the position where the electromagnetic wave is generated by comparing the levels of the signals detected by the electromagnetic wave measurement antenna of (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10233899A JP2000065876A (en) | 1998-08-20 | 1998-08-20 | Electromagnetic wave generating position detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10233899A JP2000065876A (en) | 1998-08-20 | 1998-08-20 | Electromagnetic wave generating position detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000065876A true JP2000065876A (en) | 2000-03-03 |
Family
ID=16962331
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10233899A Pending JP2000065876A (en) | 1998-08-20 | 1998-08-20 | Electromagnetic wave generating position detection device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000065876A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002284010A (en) * | 2001-03-28 | 2002-10-03 | West Japan Railway Co | Train stop detection device |
| JP2006155328A (en) * | 2004-11-30 | 2006-06-15 | Universal Shipbuilding Corp | Discharge type security device |
| JP2010117180A (en) * | 2008-11-11 | 2010-05-27 | Active Medical Co Ltd | Poor grounding detector |
| JP2011043393A (en) * | 2009-08-20 | 2011-03-03 | Central Res Inst Of Electric Power Ind | Radiation noise source identification method |
| CN102890203A (en) * | 2011-04-30 | 2013-01-23 | 深圳光启高等理工研究院 | Method and device for selecting test point of artificial electromagnetic material unit |
| WO2013176373A1 (en) * | 2012-05-23 | 2013-11-28 | 서울대학교 산학협력단 | Electromagnetic wave measuring device for selectively measuring electromagnetic waves |
| JP2019200093A (en) * | 2018-05-15 | 2019-11-21 | 日本電気株式会社 | Processing device, method, program and system |
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1998
- 1998-08-20 JP JP10233899A patent/JP2000065876A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002284010A (en) * | 2001-03-28 | 2002-10-03 | West Japan Railway Co | Train stop detection device |
| JP2006155328A (en) * | 2004-11-30 | 2006-06-15 | Universal Shipbuilding Corp | Discharge type security device |
| JP4711389B2 (en) * | 2004-11-30 | 2011-06-29 | ユニバーサル特機株式会社 | Discharge type security device |
| JP2010117180A (en) * | 2008-11-11 | 2010-05-27 | Active Medical Co Ltd | Poor grounding detector |
| JP2011043393A (en) * | 2009-08-20 | 2011-03-03 | Central Res Inst Of Electric Power Ind | Radiation noise source identification method |
| CN102890203A (en) * | 2011-04-30 | 2013-01-23 | 深圳光启高等理工研究院 | Method and device for selecting test point of artificial electromagnetic material unit |
| WO2013176373A1 (en) * | 2012-05-23 | 2013-11-28 | 서울대학교 산학협력단 | Electromagnetic wave measuring device for selectively measuring electromagnetic waves |
| JP2019200093A (en) * | 2018-05-15 | 2019-11-21 | 日本電気株式会社 | Processing device, method, program and system |
| JP7135427B2 (en) | 2018-05-15 | 2022-09-13 | 日本電気株式会社 | Processor, method, program and system |
| WO2020101402A1 (en) * | 2018-11-14 | 2020-05-22 | Samsung Electronics Co., Ltd. | Method for measuring electromagnetic signal radiated from device and electronic device thereof |
| US10779427B2 (en) | 2018-11-14 | 2020-09-15 | Samsung Electronics Co., Ltd. | Method for measuring electromagnetic signal radiated from device and electronic device thereof |
| CN113015915A (en) * | 2018-11-14 | 2021-06-22 | 三星电子株式会社 | Method for measuring electromagnetic signals radiated from a device and electronic device thereof |
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