JPH0358545A - Resistance value measuring system - Google Patents
Resistance value measuring systemInfo
- Publication number
- JPH0358545A JPH0358545A JP1194985A JP19498589A JPH0358545A JP H0358545 A JPH0358545 A JP H0358545A JP 1194985 A JP1194985 A JP 1194985A JP 19498589 A JP19498589 A JP 19498589A JP H0358545 A JPH0358545 A JP H0358545A
- Authority
- JP
- Japan
- Prior art keywords
- measurement
- resistance value
- resistance
- packet
- section
- 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
- 238000005259 measurement Methods 0.000 claims abstract description 73
- 230000005540 biological transmission Effects 0.000 claims description 53
- 238000000034 method Methods 0.000 claims description 5
- 101100172132 Mus musculus Eif3a gene Proteins 0.000 claims description 3
- 238000004891 communication Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 238000000691 measurement method Methods 0.000 description 2
- 206010011878 Deafness Diseases 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、ＣＳＭＡ方式のローカルエリアネットワーク
に・おける抵抗値測定方式に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a resistance value measurement method in a CSMA local area network.
従来、抵抗値測定はテスターによって測定していた。 Conventionally, resistance values have been measured using testers.
上述した方式は・、共有伝送路の抵抗値を測定するため
には、共有伝送路を使用しない状態で行なう必要があり
、測定のためにネットワークシステムを停止する必要が
あり測定できる時間が限られたり、測定に長時間を必要
とするという問題点があった。In the above method, in order to measure the resistance value of a shared transmission line, it is necessary to do so without using the shared transmission line, and the network system must be stopped for measurement, which limits the time available for measurement. There are also problems in that measurements require a long time.
本発明の抵抗値測定方式の構成は、共有する伝送路にア
クセスする方式としてＣＳＭＡ（Ｃａ−ｒｒｉｅｒ Ｓ
ｅｎｓｅ Ｍｕｌｔｉｐｕｌ Ａｃｃｅｓｓ ）方式を
用いているローカルエリアネットワークにおいて、前記
共イｊ− （ｘ送路にパケットが流れているかを調べる
手段と、前記共有伝送路が空いている場合直ちに抵抗“
（ｉα測定を開始ずろ手段と、前記共有伝送路にパケッ
１へか流れている場合伝送聞が空くのを待ち空いたらず
ぐに抵抗値測定を開始する手段と、共有伝送路−１二に
流れる最大パケット長のパケット送信時間と伝｛・投遅
延時間を合計した値をＴ ｍ ａ ｘとしたＯｊ４に′
丁ｍｎＸ時ｔＲ１以上；’ｊｊｊｌ定用ｆ３号を出力し
前記測定用信号を出力開始してか八Ｔ ｍ ａ Ｘ時間
以−Ｅたった時点て電流１Ｌを調べることにより抵抗値
フ１１定をする手段を持つことを特徴とする。The configuration of the resistance value measurement method of the present invention uses CSMA (Ca-rrier S) as a method for accessing a shared transmission path.
In a local area network using the Sense Multiple Access) system, there is a means for checking whether a packet is flowing on the shared transmission path, and a means for checking whether a packet is flowing on the shared transmission path, and a means for checking whether a packet is flowing on the shared transmission path, and when the shared transmission path is vacant, the resistance is immediately
(a means for delaying the start of iα measurement; a means for waiting for an empty transmission line when the packet is flowing to the shared transmission line-1; and a means for starting the resistance value measurement immediately after the transmission line is empty; In Oj4, where Tmax is the sum of the packet transmission time of the maximum packet length and the transmission/throwing delay time,
At tR1 or more, the resistance value F11 is determined by checking the current 1L after 8 Tm a Characterized by having the means.
次に、本発明について図面を参照して５（ト明する。 Next, the present invention will be explained in detail with reference to the drawings.
第１図は、本発明の方式を実施した例であり、共有伝送
路１と、共有伝送路上のバケツ１〜の有無を調へるキャ
リアセンス部３と、測定用信号の′准流量を調べる電流
測定部４と、測定タイミング制御部７からの送信要求に
よって測定用信号を出力する測定用信号出力部５と、測
定タイミング制御部７からの指示によって電流測定部４
からＦ．ｐ流址を読み取り抵抗ｆ直に換算する抵抗値算
出部６と、キャリアセンス部３からの信号を基準として
測定用信号出力部５に送信要求をだしかつ送信開始？ラ
２Ｔ Ｉ’ｌｌ ｎ Ｘ時間以上の後で抵抗値算出部６
に＋；ｆ’：．流読み取り指示を出す測定タイミング制
御部７から柘成される。FIG. 1 shows an example of implementing the method of the present invention, in which a shared transmission path 1, a carrier sense unit 3 that checks the presence or absence of buckets 1 to 1 on the shared transmission path, and a sub-flow rate of measurement signals are checked. A current measurement section 4 , a measurement signal output section 5 that outputs a measurement signal in response to a transmission request from the measurement timing control section 7 , and a current measurement section 4 that outputs a measurement signal according to an instruction from the measurement timing control section 7 .
From F. A transmission request is issued to the measurement signal output section 5 based on the signals from the resistance value calculation section 6, which reads the p current and directly converts it into resistance f, and the carrier sense section 3, and starts transmission. 2T I'll n After more than X hours, the resistance value calculation unit 6
+;f':. It is composed of a measurement timing control section 7 which issues a flow reading instruction.
第２図は、動作状況を説明した例であり、（１）は伝送
路が測定期間中、伝送装置からの通信パケノ１・か流れ
ていない時の共有伝送路上の状悪を時間軸を横にとって
あらわした図であり、信号か流れていない状態である伝
送路アイドル８と、測定用信号のみか流れている状態で
ある測定用信号９と．Ｔｍａｘ時間１０の時間間隔と、
電流値をｉｌＩｉ定するボイン１・・である抵抗値測定
ボイン１・１１と、測定を開始するボ・イントであるＷ
ＩＪ定開始ボイン１・１２から構成される。（２）は測
定用信号を出力した直後に他の伝送装置からパケットを
送信した？め衝突を起した時の共有伝送路上の状態を時
間軸を横にとってあらわした図であり、信号が流れてい
ない状態である伝送路アイドル１３と、測定用（ス号だ
けが流れている状等．である測定用信号１４と、伝送装
置からの信号と測定用ｆ３号が衝突している衝突期間１
５と、Ｔ−８時間１６の時間間隔と、電流値を測定する
ポイントである抵抗値測定ポイント１７と、測定を開始
するポイントである田１１定開始ボインＩ〜１８から構
成される。（３）は、，１“１１定をしようとする際に
、池の装置の送信したバ′ｒットが流れていたため共有
伝送路が空くのを待ってから測定を開始する際の共有伝
送路上の状聾交時間軸を横にとってあらわした図であり
、伝送＞■２ ７１が送信したパケットである通信バゲ
ット１． （＊ ｌ−信号が流れていない状態である伝
送路アイドル２１と、測定用信号だけが流れている状態
である抵抗用信号２０と−Ｔ．．ｌａｘ時間２２の時間
間１（；．Ｍと、電流値を測定するポイントである抵抗
値測定ポイント２３と、測定を開始するポイントである
測定開始ボインＩ〜２４から構成される。Figure 2 is an example explaining the operating situation, and (1) shows the poor condition of the shared transmission path when no communication packets are flowing from the transmission device during the measurement period, across the time axis. This is a diagram showing a transmission line idle 8 in which no signal is flowing, a measurement signal 9 in which only a measurement signal is flowing, and . a time interval of Tmax time 10;
Resistance value measurement points 1 and 11 are points 1 and 11 for determining the current value, and points W are points for starting measurement.
Consists of IJ constant start boins 1 and 12. In (2), did you send a packet from another transmission device immediately after outputting the measurement signal? This is a diagram showing the state of the shared transmission path when a collision occurs with the time axis horizontally, and shows the transmission path idle 13 in which no signal is flowing, and the transmission path idle 13 in which no signal is flowing, and the state in which only the signal is flowing (such as a state in which only the signal is flowing). Collision period 1 in which the measurement signal 14 which is ., the signal from the transmission device and the measurement f3 collide
5, a time interval of T-8 time 16, a resistance value measurement point 17 which is a point for measuring a current value, and a constant start point I to 18 which is a point to start measurement. In (3), when trying to make the 111 measurement, the shared transmission when starting the measurement after waiting for the shared transmission path to become free because the packets sent by the Ike's device were flowing. This is a diagram showing the deaf communication time axis on the road sideways, and shows the communication baguette 1, which is the packet transmitted by Transmission>■2 71. The resistance signal 20 is in a state where only the signal for resistance is flowing, and the time 1 (;. It consists of measurement start points I to 24.
次に、本発明の実施例の動作について説明する。Next, the operation of the embodiment of the present invention will be explained.
本発明の実施例では、第１図中キャリアセンス部３は常
に共有１云送路１上にパケットが流れているかを監視し
測定タイミング制御部７にバケツ１〜の有無の情報を送
る。測定タイミング制御部７は、Ｊｐｌ定をする際、ま
ずキャリアセンス部３かｔ）受けるバケツ１への有無の
情報を調べ、パケッｌ・がある場合パケットがなくなる
までそのまま待ち、バケツ１−が無い場合もしくはパケ
ットが無くなー）た場合、すぐに測定用信号出力部５に
、測定用の信号の出力指令をだす。その後、測定タイミ
ンク制御部７は、前記Ｔｍａｘ時間経過したのちに、抵
抗値算出部６に、抵抗値算出の指示を出し、抵抗値算出
部６が抵抗値を算出したのち、測定用信２出力部５に測
定用信号の出力停止の指令をだす。In the embodiment of the present invention, the carrier sense unit 3 in FIG. 1 constantly monitors whether packets are flowing on the shared 1 transmission path 1 and sends information on the presence or absence of buckets 1 to the measurement timing control unit 7. When determining the JPL, the measurement timing control unit 7 first checks the presence/absence information received by the carrier sense unit 3 in bucket 1, and if there is a packet, it waits until there are no more packets, and if there is no bucket 1-. (or if the packet is lost), an instruction to output a measurement signal is immediately issued to the measurement signal output section 5. After that, the measurement timing control section 7 issues an instruction to the resistance value calculation section 6 to calculate the resistance value after the Tmax time has elapsed, and after the resistance value calculation section 6 calculates the resistance value, the measurement signal 2 is output. A command is issued to unit 5 to stop outputting the measurement signal.
測定用信号出力部５は、測定タイミング制御部７からの
測定用の信号の出力指令を受けると測定用信号を電流測
定部４経由で共有伝送路１に送信し、測定タイミング制
御部７からの出力停止の指令を受け取ると測定用信号の
送信を停止する。電流測定部４は、常に測定用信号出力
部５から共有伝送路１に出される信号の電流値を抵抗算
出部６へ送る。抵抗算出部６は、測定タイミング制御部
７からの抵抗値算出の指令を受け取ると、電流測定部４
から電流値を読み取り抵抗値に換算して表示する。When the measurement signal output unit 5 receives a measurement signal output command from the measurement timing control unit 7 , it transmits the measurement signal to the shared transmission path 1 via the current measurement unit 4 , and outputs the measurement signal from the measurement timing control unit 7 . When receiving a command to stop output, it stops transmitting measurement signals. The current measurement section 4 always sends the current value of the signal output from the measurement signal output section 5 to the shared transmission path 1 to the resistance calculation section 6. When the resistance calculation unit 6 receives the command to calculate the resistance value from the measurement timing control unit 7, the resistance calculation unit 6 starts the current measurement unit 4.
Read the current value from , convert it to resistance value and display it.
第２図では、伝送路上の信号の流れを表わしており、（
１）では伝送路が常にアイドル状態の時であり、測定開
始ポイント１２で伝送路アイドルの状態を検出するとす
ぐに測定用信号９を出力し、抵抗値測定ポイント１１で
抵抗値を測定する。（２）では測定用信号と他の伝送装
置からの通信パケットが衝突をおごした場合であり、測
定開始ポイント１８で伝送路アイドル１３の状態を検出
すると、すぐ測定用信号１４を出力する。ところが１つ
以上の伝送装置も同様−に伝送路アイドル１４の状！ぶ
を同時に検出してパケットを出力したために衝突が発生
する。衝突期間１５が終了するのは、最大パケット長の
パケット送信時間と伝搬遅延時間を合計した値であるＴ
．．．１６時間より短いことから、抵抗値測定ポイント
１７では測定用信号ｌ４のみが流れていることになり正
しい抵抗値を測定することができる。（３）では、測定
開始ボインＩ・２４で伝送装置が送信した通信パケッ）
・１９が伝送路上を流れていた場合で、通信パケット１
９が終了するのを待ち、伝送路アイドル２１
〔発明の効果〕
以上説明したように本発明は、ネットワーク運用中での
抵抗値測定を可能とし、必要な時にいつでもかつ短時間
で抵抗を測定することが可能にする効果がある。Figure 2 shows the flow of signals on the transmission path.
In 1), the transmission line is always in an idle state, and as soon as the idle state of the transmission line is detected at the measurement start point 12, the measurement signal 9 is output, and the resistance value is measured at the resistance value measurement point 11. In (2), there is a collision between the measurement signal and a communication packet from another transmission device, and when the state of the transmission line idle 13 is detected at the measurement start point 18, the measurement signal 14 is immediately output. However, one or more transmission devices are also in the state of transmission line idle 14! A collision occurs because two packets are detected at the same time and the packets are output. The collision period 15 ends at T, which is the sum of the packet transmission time of the maximum packet length and the propagation delay time.
．． ．． ．． Since it is shorter than 16 hours, only the measurement signal l4 is flowing at the resistance value measurement point 17, so that the correct resistance value can be measured. In (3), the communication packet sent by the transmission device at measurement start point I.24)
・If 19 is flowing on the transmission path, communication packet 1
9 is completed, and the transmission line idles 21. [Effects of the Invention] As explained above, the present invention enables resistance value measurement during network operation, and resistance can be measured whenever necessary and in a short time. It has the effect of making it possible.
第１図は本発明による抵抗測定装置の構成例を示す図、
第２図は本発明の動作状態の例を示す図である。
１・・・共有伝送路、２・・・抵抗測定装置、３・・・
キャ？アセンス部、４・・・電流測定部、５・・・測定
用信号出力部、６・・・抵抗値算出部、７・・・測定タ
イミング制御部、８・・・伝送路アイドル、９・・・測
定用信号、１０・・・Ｔ■８時間、１１・・・抵抗値測
定ポイント、１２・・・測定開始ポイント、１３・・・
伝送路アイドル、１４・・・測定用信号、１５・・・衝
突期間、１６・・・Ｔ■、８時間、１７・・・抵抗値測
定ポイント、１８・・・測定開始ポイント、１つ・・・
通信パケット、２０・・・測定用信号、２１・・・伝送
路アイドル、２２・・・Ｔ■８時間、２３・・・抵抗値
測定ポイント、２４・・・測定開始ポインｌ・。FIG. 1 is a diagram showing an example of the configuration of a resistance measuring device according to the present invention;
FIG. 2 is a diagram showing an example of the operating state of the present invention. 1... Shared transmission line, 2... Resistance measuring device, 3...
Kya? sense section, 4... current measurement section, 5... measurement signal output section, 6... resistance value calculation section, 7... measurement timing control section, 8... transmission path idle, 9...・Measurement signal, 10...T■8 hours, 11...Resistance value measurement point, 12...Measurement start point, 13...
Transmission path idle, 14...Measurement signal, 15...Collision period, 16...T■, 8 hours, 17...Resistance value measurement point, 18...Measurement start point, one...・
Communication packet, 20...Measurement signal, 21...Transmission line idle, 22...T■8 hours, 23...Resistance value measurement point, 24...Measurement start point l.
Claims (1)
ａｒｒｉｅｒＳｅｎｓｅＭｕｌｔｉｐｕｌＡｃｃｅｓｓ
）方式を用いているローカルエリアネットワークにおい
て、前記共有伝送路にパケットが流れているかを調べる
手段と、前記共有伝送路が空いている場合直ちに抵抗値
測定を開始する手段と、前記共有伝送路にパケットが流
れている場合伝送路が空くのを待ち空いたらすぐに抵抗
値測定を開始する手段と、共有伝送路上に流れる最大パ
ケット長のパケット送信時間と伝搬遅延時間を合計した
値をＴ＿ｍ＿ａ＿ｘとした時にＴ＿ｍ＿ａ＿ｘ時間以上
測定用信号を出力し前記測定用信号を出力開始してから
Ｔ＿ｍ＿ａ＿ｘ時間以上たった時点で電流量を調べるこ
とにより抵抗値測定をする手段を持つことを特徴とする
抵抗値測定方式。CSMA (C
carrierSenseMultipulAccess
) method, means for checking whether a packet is flowing on the shared transmission path, means for immediately starting resistance value measurement when the shared transmission path is vacant, and means for checking whether a packet is flowing on the shared transmission path; T_m_a_x is the sum of the packet transmission time and propagation delay time of the maximum packet length flowing on the shared transmission path, and the means to wait until the transmission path is free when packets are flowing and start measuring the resistance value as soon as the transmission path is free. 1. A resistance value measuring method characterized by having a means for measuring a resistance value by outputting a measurement signal for T_m_a_x time or more and checking the amount of current after T_m_a_x time or more after starting output of the measurement signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1194985A JPH0358545A (en) | 1989-07-26 | 1989-07-26 | Resistance value measuring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1194985A JPH0358545A (en) | 1989-07-26 | 1989-07-26 | Resistance value measuring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0358545A true JPH0358545A (en) | 1991-03-13 |
Family
ID=16333623
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1194985A Pending JPH0358545A (en) | 1989-07-26 | 1989-07-26 | Resistance value measuring system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0358545A (en) |
-
1989
- 1989-07-26 JP JP1194985A patent/JPH0358545A/en active Pending
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