JP2022008080A5

JP2022008080A5 -

Info

Publication number: JP2022008080A5
Application number: JP2021080639A
Authority: JP
Filing date: 2021-05-11
Publication date: 2024-05-10

Description

本発明の第一の態様によれば、電流測定部品は、互いに離間するとともに対向して配置される一対の側面部と、前記一対の側面部に掛け渡され、前記一対の側面部の間に空間を形成する掛け渡し部と、前記一対の側面部の各々に取り付けられ、対応する側面部に形成された孔部を貫通する内部導体を備える一対の同軸部品と、を備える。さらに電流測定部品は、前記一対の同軸部品の内部導体同士を電気的に接続する接続部と、前記接続部の外周部に間隙を形成した状態で前記接続部の外周部を包囲する筒状部と、を備える。そして、前記一対の側面部及び前記掛け渡し部は、前記一対の同軸部品の外部導体同士が電気的に接続されるよう導電性を有し、前記筒状部は、前記一対の側面部の第一の側面部に基端部が電気的に接続されるとともに、前記一対の側面部の第二の側面部に取り付けられた前記同軸部品の外部導体から先端部が電気的に離れている。 According to a first aspect of the present invention, a current measuring component includes a pair of side portions arranged opposite to each other and spaced apart from each other, a bridge portion that spans the pair of side portions and forms a space between the pair of side portions, and a pair of coaxial components that are attached to each of the pair of side portions and have an internal conductor that passes through a hole formed in the corresponding side portion. The current measuring component further includes a connection portion that electrically connects the internal conductors of the pair of coaxial components to each other, and a cylindrical portion that surrounds the outer periphery of the connection portion while forming a gap on the outer periphery of the connection portion. The pair of side portions and the bridge portion are conductive so that the outer conductors of the pair of coaxial components are electrically connected to each other, and the cylindrical portion has a base end electrically connected to a first side portion of the pair of side portions and a tip end electrically separated from the outer conductor of the coaxial component attached to the second side portion of the pair of side portions .

第二の態様によれば、電流測定部品は、互いに離間するとともに対向して配置される一対の側面部と、前記一対の側面部に掛け渡され、前記一対の側面部の間に空間を形成する掛け渡し部と、前記一対の側面部の各々に取り付けられ、対応する側面部に形成された孔部を貫通する内部導体を備える一対の同軸部品と、前記一対の同軸部品の内部導体同士を電気的に接続する接続部と、前記接続部の外周部に間隙を形成した状態で前記接続部の外周部を包囲する筒状部と、を備える。前記電流測定部品においては、前記一対の側面部及び前記掛け渡し部を用いて前記一対の同軸部品の外部導体同士を電気的に接続し、前記一対の側面部の第一の側面部に前記筒状部の基端部を電気的に接続するとともに、前記一対の側面部の第二の側面部に取り付けられた前記同軸部品の外部導体から前記筒状部の先端部を電気的に離している。電流測定方法は、前記電流測定部品を用いることにより前記一対の同軸部品に流れる電流を測定する方法であり、前記空間内に電流センサを配置し、前記電流センサによって前記筒状部を包囲した状態にするステップと、前記電流センサによって前記接続部に流れる電流を検出するステップと、を有する。 According to a second aspect, the current measuring component includes a pair of side portions arranged opposite to each other and spaced apart from each other, a bridge portion spanning the pair of side portions to form a space between the pair of side portions, a pair of coaxial components attached to each of the pair of side portions and including an internal conductor passing through a hole formed in the corresponding side portion, a connection portion electrically connecting the internal conductors of the pair of coaxial components to each other, and a tubular portion surrounding the outer periphery of the connection portion while forming a gap on the outer periphery of the connection portion. In the current measuring component, the pair of side portions and the bridge portion are used to electrically connect the external conductors of the pair of coaxial components to each other, a base end of the tubular portion is electrically connected to a first side portion of the pair of side portions , and a tip end of the tubular portion is electrically separated from the external conductor of the coaxial component attached to the second side portion of the pair of side portions . The current measurement method is a method for measuring the current flowing through the pair of coaxial components by using the current measurement component, and includes the steps of placing a current sensor in the space and surrounding the cylindrical portion with the current sensor, and detecting the current flowing through the connection portion with the current sensor.

このような構成を採用することにより、一方の同軸部品の外部導体、筒状部、一対の側面部、及び掛け渡し部の電位と、他方の同軸部品の外部導体の電位と、を概ね同じにすることができる。これに加え、電流測定部品に配置される電流センサを通過する電流、すなわち一方の同軸部品の内部導体、接続部、他方の同軸部品の内部導体の順にこれらを流れた電流が、電流センサを通過して他方の同軸部品の外部導体の第二電極体、筒状部、一方の同軸部品の外部導体の順にこれらを流れて折り返してくることを防ぐことができる。 By adopting such a configuration, the potential of the outer conductor, the cylindrical portion, the pair of side portions, and the bridge portion of one coaxial component can be made substantially the same as the potential of the outer conductor of the other coaxial component. In addition, it is possible to prevent a current passing through the current sensor disposed in the current measuring component, i.e., a current that flows through the inner conductor of one coaxial component, the connection portion, and the inner conductor of the other coaxial component in this order, from passing through the current sensor, flowing through the second electrode body of the outer conductor of the other coaxial component, the cylindrical portion, and the outer conductor of the one coaxial component in this order, and then turning back.

上述のような同軸伝送システム１においては、例えば障害箇所を切り分けるために複数のポイントにおいて本実施形態における電流測定装置１００が配置される。例えば、電流測定装置１００は、同軸ケーブル３０ａに流れる交流電流を測定するために交流装置１０と信号源側の終端抵抗器４１との間に配置される。さらに電流測定装置１００は、同軸ケーブル３０ｂに流れる交流電流を測定するために交流装置１０と負荷装置２０との間に配置されるとともに、同軸ケーブル３０ｃに流れる交流電流を測定するために負荷装置２０と負荷側の終端抵抗器４２との間に配置される。 In the above-described coaxial transmission system 1, the current measuring device 100 of the present embodiment is disposed at a plurality of points in order to isolate the location of a fault, for example. For example, the current measuring device 100 is disposed between the AC device 10 and the termination resistor 41 on the signal source side in order to measure the AC current flowing through the coaxial cable 30a. Furthermore, the current measuring device 100 is disposed between the AC device 10 and the load device 20 in order to measure the AC current flowing through the coaxial cable 30b, and between the load device 20 and the termination resistor 42 on the load side in order to measure the AC current flowing through the coaxial cable 30c.

一対の側面部３１０，３２０が設けられることにより、第一の側面部３１０と第二の側面部３２０との間に、電流センサ２００を配置するために必要となる空間（配置空間）Ｓが形成される。これにより、電流センサ２００から測定対象物以外の電路及び電子部品などを物理的に遠ざけることが可能となる。 By providing the pair of side surface portions 310, 320, a space (arrangement space) S required for arranging the current sensor 200 is formed between the first side surface portion 310 and the second side surface portion 320. This makes it possible to physically keep electrical paths and electronic components other than the object to be measured away from the current sensor 200.

本実施形態の掛け渡し部３３０は対向する二つの板状の部材で構成されているが、掛け渡し部３３０は、一又は三つの板状の部材で構成されてよく、あるいは、筒状の部材で構成されてもよい。また、本実施形態では電流センサ２００を挿入するために、掛け渡し部３３０の外周の一部が開口するように掛け渡し部３３０が成形されているが、掛け渡し部３３０は電流センサ２００の外周全部を覆うように成形されてもよい。 In this embodiment, the bridging portion 330 is composed of two opposing plate-shaped members, but the bridging portion 330 may be composed of one or three plate-shaped members, or may be composed of a cylindrical member. In this embodiment, the bridging portion 330 is formed so that a part of the outer periphery of the bridging portion 330 is opened in order to insert the current sensor 200, but the bridging portion 330 may be formed so as to cover the entire outer periphery of the current sensor 200.

同軸コネクタ３５０は、図３及び図５に示すように上述の同軸コネクタ３４０と同様、内部導体であるピン３５１と、外部導体である本体部３５２と、ピン３５１及び本体部３５２間を絶縁するための誘電層３５３と、本体部３５２の先端部から径方向に突出するフランジ３５４とを備える。ピン３５１、本体部３５２、誘電層３５３及びフランジ３５４は、同軸コネクタ３４０と同様の構成であるため、ここでの説明を省略する。 3 and 5, similarly to the above-described coaxial connector 340, the coaxial connector 350 includes a pin 351 which is an inner conductor, a main body 352 which is an outer conductor, a dielectric layer 353 for insulating between the pin 351 and the main body 352, and a flange 354 which protrudes radially from the tip of the main body 352. The pin 351, the main body 352, the dielectric layer 353, and the flange 354 have the same configuration as the coaxial connector 340, and therefore description thereof will be omitted here.

これにより、筒状部３６２が挿通された電流センサ２００を通過する電流、すなわち同軸コネクタ３４０のピン３４１、接続部３６１、同軸コネクタ３５０のピン３５１の順に流れた電流が、電流センサ２００を通過して同軸コネクタ３５０の本体部３５２、筒状部３６２、同軸コネクタ３４０の本体部３４２の順に流れて戻ることを防ぐことができる。 This prevents the current passing through the current sensor 200 with the tubular portion 362 inserted, i.e. , the current flowing in this order through pin 341 of coaxial connector 340, connection portion 361, and pin 351 of coaxial connector 350, from passing through the current sensor 200 and flowing back in the order of main body portion 352 of coaxial connector 350, tubular portion 362, and main body portion 342 of coaxial connector 340.

このように、間隙３６４を側面部３２０の孔部３２３又はその近傍に設けることにより、間隙３６４から電流センサ２００を遠ざけることができる。したがって、露出した接続部３６１から電流センサ２００に向かって放射される電界及び電磁界などのノイズを低減することができる。 In this manner, by providing the gap 364 in or near the hole 323 of the side surface portion 320, the current sensor 200 can be kept away from the gap 364. Therefore, noise such as an electric field and an electromagnetic field radiated from the exposed connection portion 361 toward the current sensor 200 can be reduced.

筒状部３６２の先端に設けられる間隙３６４は、一対の側面部３１０，３２０間の長手方向における電流センサ２００の長さ（幅）よりも狭くなるように設計される。これにより、筒状部３６２から露出した接続部３６１の長さは比較的短くなるので、露出した接続部３６１から放射される電界及び電磁界などのノイズを低減することができる。 The gap 364 provided at the tip of the cylindrical portion 362 is designed to be narrower than the length (width) of the current sensor 200 in the longitudinal direction between the pair of side portions 310, 320. As a result, the length of the connection portion 361 exposed from the cylindrical portion 362 becomes relatively short, so that noise such as electric and electromagnetic fields radiated from the exposed connection portion 361 can be reduced.

さらに、筒状部３６２も、筐体３００Ａと同様に導電性を有しているため、同軸コネクタ３４０の本体部３４２から筒状部３６２にも電流が流れる。これにより、筐体３００Ａと筒状部３６２とは概ね同じ電位になる。したがって、筐体３００Ａと接続部３６１との間で生じる電界及び電磁界などのノイズが、筐体３００Ａとほぼ同じ電位の筒状部３６２によって遮蔽される。それゆえ、接続部３６１から筐体３００Ａ内の空間Ｓにノイズとして放射される電界及び電磁界などを抑制することができる。 Furthermore, since the cylindrical portion 362 is conductive like the housing 300A, a current also flows from the main body 342 of the coaxial connector 340 to the cylindrical portion 362. As a result, the housing 300A and the cylindrical portion 362 have approximately the same potential. Therefore, noise such as an electric field and an electromagnetic field generated between the housing 300A and the connection portion 361 is shielded by the cylindrical portion 362, which has approximately the same potential as the housing 300A. Therefore, it is possible to suppress the electric field and the electromagnetic field radiated as noise from the connection portion 361 into the space S within the housing 300A.

ここで電流測定器具３００内の空間Ｓに生じるノイズについて詳細に説明する。まず、接続部３６１の周囲に導電性を有する筒状部３６２を省いた構成では、筐体３００Ａと接続部３６１との電位差に起因して電流測定器具３００内の空間Ｓには電界及び電磁界などのノイズが発生する。このノイズの影響により空間Ｓに配置された電流センサ２００の検出精度が低下してしまう。 Here, a detailed description will be given of the noise generated in the space S within the current measuring instrument 300. First, in a configuration in which the conductive cylindrical portion 362 around the connection portion 361 is omitted, noise such as an electric field and an electromagnetic field is generated in the space S within the current measuring instrument 300 due to the potential difference between the housing 300A and the connection portion 361. The effect of this noise reduces the detection accuracy of the current sensor 200 disposed in the space S.

これに対し、本実施形態においては接続部３６１の外周部に筒状部３６２が設けられ、その筒状部３６２と筐体３００Ａとが電気的に接続されている。それゆえ、筐体３００Ａと筒状部３６２との電位差がほぼゼロになるので、電流センサ２００が配置される空間Ｓには、上述のように電界及び電磁界などのノイズの発生が抑制される。したがって、筒状部３６２を省略した構成に比べて、電流センサ２００に混入するノイズを抑制することが可能となる。 In contrast, in this embodiment, a cylindrical portion 362 is provided on the outer periphery of the connection portion 361, and the cylindrical portion 362 is electrically connected to the housing 300A. Therefore, the potential difference between the housing 300A and the cylindrical portion 362 becomes almost zero, so that the generation of noise such as electric and electromagnetic fields is suppressed in the space S in which the current sensor 200 is disposed, as described above. Therefore, it is possible to suppress noise from being mixed into the current sensor 200, compared to a configuration in which the cylindrical portion 362 is omitted.

上述の構成によれば、一対の側面部３１０，３２０の間に掛け渡し部３３０が設けられる。これにより、同軸コネクタ３４０，３５０の少なくとも一方に接続された同軸ケーブル３０とは異なる電路又は電子部品などを電流測定器具３００内の接続部３６１から物理的に遠ざけることができる。それゆえ、一対の側面部３１０，３２０及び掛け渡し部３３０によって形成される空間Ｓに発生するノイズを低減できるので、同軸ケーブル３０のような同軸伝送路から電流測定器具３００に伝送される電流を精度よく測定することができる。 According to the above-mentioned configuration, the bridge 330 is provided between the pair of side portions 310, 320. This makes it possible to physically keep electrical paths or electronic components, which are different from the coaxial cable 30 connected to at least one of the coaxial connectors 340, 350, away from the connection portion 361 in the current measuring instrument 300. This makes it possible to reduce noise generated in the space S formed by the pair of side portions 310, 320 and the bridge 330 , so that the current transmitted from a coaxial transmission path such as the coaxial cable 30 to the current measuring instrument 300 can be measured with high accuracy.

これに加え、一対の側面部３１０，３２０及び掛け渡し部３３０に導電性を持たせることにより、一対の同軸コネクタ３４０，３５０の本体部３４２，３５２同士が電気的に接続されるので、電流測定器具３００の外部から混入し得るノイズを遮蔽しやすくなる。また、接続部３６１の外周部から離間して筒状部３６２を配置することにより、筒状部３６２の内側に接続部３６１から発生する電界及び電磁界を閉じ込めることができる。 In addition, by making the pair of side portions 310, 320 and the bridge portion 330 conductive, the main bodies 342, 352 of the pair of coaxial connectors 340, 350 are electrically connected to each other, which makes it easier to block noise that may be mixed in from outside the current measuring instrument 300. Furthermore, by arranging the cylindrical portion 362 away from the outer periphery of the connection portion 361, the electric field and electromagnetic field generated from the connection portion 361 can be confined inside the cylindrical portion 362.

これと共に、筒状部３６２の先端に間隙３６４を設けることにより、電流センサ２００を挿通して一方の同軸コネクタ３４０のピン３４１、接続部３６１、他方の同軸コネクタ３５０のピン３５１の順に流れた電流が、電流センサ２００を通過して他方の同軸コネクタ３５０の本体部３５２、筒状部３６２、一方の同軸コネクタ３４０の本体部３４２の順に流れて戻ることを防ぐことができる。その結果、電流測定器具３００内の空間Ｓにおいて、接続部３６１に流れる電流によって接続部３６１を中心に磁界を発生させることができる。 In addition, by providing a gap 364 at the tip of the cylindrical portion 362, it is possible to prevent a current that has passed through the current sensor 200 and flowed in this order through the pin 341 of one coaxial connector 340, the connection portion 361, and the pin 351 of the other coaxial connector 350, from passing through the current sensor 200 and flowing in this order through the main body 352 of the other coaxial connector 350, the cylindrical portion 362, and the main body 342 of the one coaxial connector 340, before returning. As a result, in the space S within the current measuring instrument 300, a magnetic field can be generated around the connection portion 361 by the current flowing through the connection portion 361.

また、本実施形態において一対の側面部３１０，３２０間の方向、すなわち接続部３６１の長手方向における筒状部３６２の先端に形成される間隙３６４は、電流センサ２００の幅よりも狭い。この構成によれば、接続部３６１の露出部分を減らすことができるので、露出部分から輻射される電界及び電磁界などのノイズを低減することができる。 In this embodiment, a gap 364 formed at the tip of the tubular portion 362 in the direction between the pair of side portions 310, 320, i.e., in the longitudinal direction of the connection portion 361, is narrower than the width of the current sensor 200. With this configuration, the exposed portion of the connection portion 361 can be reduced, and therefore noise such as an electric field and an electromagnetic field radiated from the exposed portion can be reduced.

また、本実施形態において筒状部３６２は、第一の側面部３１０の内面３１１から延在し、間隙３６４を有するように第二の側面部３２０から離間する。この構成によれば、間隙３６４が第二の側面部３２０又はその近傍に形成されるので、電流センサ２００を間隙３６４から遠ざけて配置させることができる。したがって、露出した接続部３６１から電流センサ２００に向かって放射される電界及び電磁界などのノイズを低減することができる。 Moreover, in this embodiment, the cylindrical portion 362 extends from the inner surface 311 of the first side surface portion 310 and is spaced from the second side surface portion 320 so as to have a gap 364. With this configuration, the gap 364 is formed in the second side surface portion 320 or in its vicinity, so that the current sensor 200 can be disposed away from the gap 364. Therefore, noise such as an electric field and an electromagnetic field radiated from the exposed connection portion 361 toward the current sensor 200 can be reduced.

このように、筒状部３６２に対向するように筒状部４６２を備えることにより、筒状部３６２の先端に設けられる間隙３６４Ａが一対の側面部３１０，３２０の中間に形成される。このような構成であっても、接続部３６１から空間Ｓに放射されるノイズを抑制しつつ、接続部３６１に流れる交流電流によって発生する磁界を電流測定器具３０１の空間Ｓに発生させることができる。 In this manner, by providing the cylindrical portion 462 so as to face the cylindrical portion 362, the gap 364A provided at the tip of the cylindrical portion 362 is formed midway between the pair of side portions 310, 320. Even with this configuration, it is possible to generate in the space S of the current measuring instrument 301 a magnetic field generated by the alternating current flowing through the connection portion 361 while suppressing noise radiated from the connection portion 361 into the space S.

なお、本変形例では一対の側面部３１０，３２０及び掛け渡し部３３０によって構成される筐体３００Ａは導体であったが、筐体３００Ａは一対の同軸コネクタ３４０，３５０の本体部３４２，３５２同士が電気的に接続されるものであればよい。それゆえ、絶縁性を有する一対の側面部３１０，３２０及び掛け渡し部３３０の表面に導通部を張り付ける処理又は導通部材を塗布する処理を施すことにより、一対の同軸コネクタ３４０，３５０の本体部３４２，３５２同士を電気的に接続するようにしてもよい。 In this modification , the housing 300A constituted by the pair of side portions 310, 320 and the bridge portion 330 is a conductor, but the housing 300A may be any housing that electrically connects the main bodies 342, 352 of the pair of coaxial connectors 340, 350. Therefore, the main bodies 342, 352 of the pair of coaxial connectors 340, 350 may be electrically connected to each other by performing a process of attaching a conductive portion or a process of applying a conductive member to the surfaces of the pair of side portions 310, 320 and the bridge portion 330, which have insulating properties.

また、図９には示されていないが、フランジ４５４には、図４及び図５に示したフランジ３４４と同様、複数のネジ穴が形成さており、ネジ穴に挿入されるネジによって終端器４５０は、側面部３２０の外面３２２に固定されている。 Also, although not shown in FIG. 9, the flange 454 has a plurality of screw holes formed therein, similar to the flange 344 shown in FIGS. 4 and 5, and the terminator 450 is fixed to the outer surface 322 of the side portion 320 by screws inserted into the screw holes.

また、一対の側面部３１０，３２０及び掛け渡し部３３０は、第一実施形態と同様、同軸コネクタ３４０の外部導体を構成する本体部３４２と終端器４５０の第二電極体４１３とが電気的に接続されるよう導電性を有する。そして筒状部３６２は、第一の側面部３１０に基端部が電気的に接続されるとともに、第二の側面部３２０に取り付けられた終端器４５０の本体部４５２から先端部が電気的に離されている。 Similarly to the first embodiment, the pair of side portions 310, 320 and the bridge portion 330 are conductive so that the main body 342 constituting the outer conductor of the coaxial connector 340 and the second electrode body 413 of the terminator 450 are electrically connected to each other. The cylindrical portion 362 has a base end electrically connected to the first side portion 310 and a tip end electrically separated from the main body 452 of the terminator 450 attached to the second side portion 320.

これに加え、電流測定器具３０２の入力反射係数Ｓ１１は、比較対象器具の入力反射係数Ｓ１１に比べて周波数全体に亘り改善していることがわかる。この理由は、終端器４５０で生じる交流電流の反射が抑えられただけでなく、電流測定器具３０２に筐体３００Ａと電気的に接続された筒状部３６２が設けられたことによって接続部３６１から筐体３００Ａの空間Ｓに漏れる電磁波が減少したからである。 In addition, it can be seen that the input reflection coefficient S11 of the current measuring instrument 302 is improved across the entire frequency range compared to the input reflection coefficient S11 of the comparative instrument . This is because not only is the reflection of the AC current generated by the terminator 450 suppressed, but also because the current measuring instrument 302 is provided with the cylindrical portion 362 electrically connected to the housing 300A, thereby reducing the amount of electromagnetic waves leaking from the connection portion 361 into the space S of the housing 300A.

この構成によれば、第一実施形態と同様、一対の側面部３１０，３２０の端部間に掛け渡し部３３０が設けられる。これにより、同軸コネクタ３４０に接続された同軸ケーブル３０とは異なる電路及び電子部品などを電流測定器具３０２内の接続部３６１から物理的に遠ざけることができる。したがって、一対の側面部３１０，３２０及び掛け渡し部３３０によって形成される空間Ｓに混入するノイズを低減することができるので、同軸ケーブル３０から電流測定器具３０２に伝送される電流を精度よく測定することができる。 According to this configuration, similarly to the first embodiment, a bridge portion 330 is provided between the ends of the pair of side portions 310, 320. This allows electrical paths and electronic components, which are different from the coaxial cable 30 connected to the coaxial connector 340, to be physically separated from the connection portion 361 in the current measuring instrument 302. This reduces noise that gets mixed into the space S formed by the pair of side portions 310, 320 and the bridge portion 330, allowing the current transmitted from the coaxial cable 30 to the current measuring instrument 302 to be measured with high accuracy.

これに加え、第一実施形態と同様、一対の側面部３１０，３２０及び掛け渡し部３３０に導電性を持たせることにより、電流測定器具３０２の外部から筐体３００Ａ内の空間Ｓに混入し得るノイズを遮蔽しやすくなる。また、接続部３６１の外周部を包囲する筒状部３６２を配置することにより、筒状部３６２の内側において接続部３６１から発生する電界及び電磁界を閉じ込めることができる。 In addition, similarly to the first embodiment, by making the pair of side portions 310, 320 and the bridge portion 330 conductive, it becomes easier to block noise that may enter the space S in the housing 300A from the outside of the current measuring instrument 302. Also, by arranging the cylindrical portion 362 surrounding the outer periphery of the connection portion 361, the electric field and electromagnetic field generated from the connection portion 361 can be confined inside the cylindrical portion 362.

また、本実施形態において一対の側面部３１０，３２０間の方向における筒状部３６２の先端に設けられる間隙３６４は、第一実施形態と同様、一対の側面部３１０，３２０間に配置される電流センサ２００の幅よりも狭い。この構成によれば、接続部３６１の露出部分を減らすことができるので、露出部分から輻射される電界及び電磁界などのノイズを低減することができる。 In this embodiment, similarly to the first embodiment, the gap 364 provided at the tip of the cylindrical portion 362 in the direction between the pair of side portions 310, 320 is narrower than the width of the current sensor 200 disposed between the pair of side portions 310, 320. With this configuration, the exposed portion of the connection portion 361 can be reduced, and therefore noise such as electric and electromagnetic fields radiated from the exposed portion can be reduced.

また、本実施形態において筒状部３６２は、第一実施形態と同様、第一の側面部３１０の内面３１１から延在し、間隙３６４を形成するように第二の側面部３２０から離間する。この構成によれば、間隙３６４が第二の側面部３２０又はその近傍に形成されるので、電流センサ２００を間隙３６４から遠ざけて配置させることができる。したがって、露出した接続部３６１から電流センサ２００に向かって放射される電界及び電磁界などのノイズを低減することができる。 In the present embodiment, similarly to the first embodiment, the cylindrical portion 362 extends from the inner surface 311 of the first side surface portion 310 and is spaced apart from the second side surface portion 320 so as to form a gap 364. With this configuration, the gap 364 is formed in or near the second side surface portion 320, so that the current sensor 200 can be disposed away from the gap 364. Therefore, noise such as an electric field and an electromagnetic field radiated from the exposed connection portion 361 toward the current sensor 200 can be reduced.

このように電流測定方法は、電流測定器具３００乃至３０２のいずれか一つの電流測定部品を用いて同軸部品に流れる電流を測定する。この電流測定部品は、一対の側面部３１０，３２０及び掛け渡し部３３０を用いて一対の同軸部品の外部導体同士を電気的に接続し、第一の側面部３１０に筒状部３６２の基端部を電気的に接続するとともに第二の側面部３２０に取り付けられた同軸部品の外部導体から筒状部３６２の先端部を電気的に離したものである。例えば一方の同軸部品は、同軸コネクタ３４０であり、他方の同軸部品は、同軸コネクタ３５０又は終端器４５０である。第二実施形態では一対の同軸部品のうち一方は、同軸コネクタ３４０であり、他方は、終端器４５０であり、他方の内部導体は、終端器４５０の第一電極体４１１であり、他方の外部導体は、終端器４５０の第二電極体４１３である。 In this way, the current measurement method uses any one of the current measurement components of the current measurement instruments 300 to 302 to measure the current flowing through the coaxial components. This current measurement component electrically connects the external conductors of the pair of coaxial components to each other using a pair of side portions 310, 320 and a bridge portion 330, electrically connects the base end of the cylindrical portion 362 to the first side portion 310, and electrically separates the tip end of the cylindrical portion 362 from the external conductor of the coaxial components attached to the second side portion 320. For example, one coaxial component is a coaxial connector 340, and the other coaxial component is a coaxial connector 350 or a terminator 450. In the second embodiment, one of the pair of coaxial components is a coaxial connector 340, and the other is a terminator 450, the inner conductor of the other is a first electrode body 411 of the terminator 450, and the outer conductor of the other is a second electrode body 413 of the terminator 450.

そして電流測定方法は、空間Ｓ内に電流センサ２００を配置して電流センサ２００によって筒状部３６２を包囲した状態にするステップＳ１と、電流センサ２００によって接続部３６１に流れる電流を検出するステップＳ２と、を有する。 The current measurement method includes step S1 of placing the current sensor 200 in the space S so that the current sensor 200 surrounds the cylindrical portion 362, and step S2 of detecting the current flowing through the connection portion 361 using the current sensor 200.

上記実施形態では筐体３００Ａの形状が矩形筒状であったが、例えば、筐体３００Ａは、伝送路３６０を中心とする同心円状に形成することができる。これにより、伝送路３６０，３６０Ａ，３６０Ｂに流れる電流によって伝送路３６０，３６０Ａ，３６０Ｂを中心とする同心円状に磁界を発生させることが可能となる。それゆえ、電流測定器具３０１乃至３０３に正しく電流センサ２００を配置することにより、伝送路３６０，３６０Ａ，３６０Ｂに流れる電流の電流センサ２００による検出精度を高めることができる。 In the above embodiment, the shape of the housing 300A is a rectangular cylinder, but for example, the housing 300A can be formed in a concentric shape centered on the transmission line 360. This makes it possible to generate a magnetic field in a concentric shape centered on the transmission lines 360 , 360A, and 360B by the current flowing through the transmission lines 360, 360A, and 360B. Therefore, by correctly arranging the current sensor 200 in the current measuring instruments 301 to 303, it is possible to improve the detection accuracy of the current sensor 200 of the current flowing through the transmission lines 360, 360A, and 360B.

Claims

A pair of side surfaces disposed opposite each other and spaced apart from each other;
A bridge portion that spans the pair of side surfaces and forms a space between the pair of side surfaces;
a pair of coaxial components attached to the pair of side surfaces, each of the pair of coaxial components including an inner conductor passing through a hole formed in the corresponding side surface;
a connection portion that electrically connects the inner conductors of the pair of coaxial components to each other;
a cylindrical portion surrounding the outer periphery of the connection portion while forming a gap on the outer periphery of the connection portion;
the pair of side portions and the bridge portion are conductive so that the outer conductors of the pair of coaxial components are electrically connected to each other;
a base end of the cylindrical portion is electrically connected to a first side surface portion of the pair of side surface portions , and a tip end of the cylindrical portion is electrically separated from an outer conductor of the coaxial component attached to a second side surface portion of the pair of side surface portions;
Current measuring components.

2. A current measuring component according to claim 1,
The structure of the cylindrical portion and the connection portion has the same characteristic impedance with respect to the pair of coaxial components.
Current measuring components.

3. The current measuring component according to claim 1,
The pair of side portions and the bridge portion are conductors.
Current measuring components.

A current measuring component according to any one of claims 1 to 3,
a gap provided at the tip of the cylindrical portion is narrower than a width of a current sensor disposed between the pair of side portions;
Current measuring components.

A current measuring component according to any one of claims 1 to 4,
The cylindrical portion extends from an inner surface of the first side surface portion and is spaced apart from the second side surface portion to have a gap .
Current measuring components.

A current measuring component according to any one of claims 1 to 5,
A dielectric having a dielectric constant smaller than that of air is provided between the connection portion and the cylindrical portion.
Current measuring components.

A current measuring component according to any one of claims 1 to 6,
The pair of coaxial components are coaxial connectors.
Current measuring components.

A current measuring component according to any one of claims 1 to 6,
One of the pair of coaxial components is a coaxial connector and the other is a terminator;
the other internal conductor is a first electrode body of the terminator,
The other outer conductor is a second electrode body of the terminator.
Current measuring components.

A current measuring component according to any one of claims 1 to 8;
a current sensor that is disposed in the space formed between the pair of side portions by the bridge portion and detects the current flowing through the connection portion while surrounding the cylindrical portion.

A pair of side surfaces disposed opposite each other and spaced apart from each other;
A bridge portion that spans the pair of side surfaces and forms a space between the pair of side surfaces;
a pair of coaxial components attached to the pair of side surfaces, each of the pair of coaxial components including an inner conductor passing through a hole formed in the corresponding side surface;
a connection portion that electrically connects the inner conductors of the pair of coaxial components to each other;
a cylindrical portion surrounding an outer periphery of the connection portion while forming a gap on the outer periphery of the connection portion,
a current measuring method for measuring a current flowing through the pair of coaxial components by using the current measuring component in which the pair of side portions and the bridge portion are used to electrically connect the outer conductors of the pair of coaxial components, the base end of the tubular portion is electrically connected to a first side portion of the pair of side portions , and a tip end of the tubular portion is electrically separated from the outer conductor of the coaxial component attached to the second side portion of the pair of side portions,
disposing a current sensor in the space so that the current sensor surrounds the cylindrical portion;
detecting a current flowing through the connection portion by the current sensor;
A current measuring method comprising:

11. The current measurement method according to claim 10,
The current measuring method, wherein the pair of coaxial components are coaxial connectors.

11. The current measurement method according to claim 10,
One of the pair of coaxial components is a coaxial connector and the other is a terminator;
the other internal conductor is a first electrode body of the terminator,
The other outer conductor is a second electrode body of the terminator.
Current measurement method.