JPS61102876U - - Google Patents
Info
- Publication number
- JPS61102876U JPS61102876U JP18609784U JP18609784U JPS61102876U JP S61102876 U JPS61102876 U JP S61102876U JP 18609784 U JP18609784 U JP 18609784U JP 18609784 U JP18609784 U JP 18609784U JP S61102876 U JPS61102876 U JP S61102876U
- Authority
- JP
- Japan
- Prior art keywords
- contact
- contact resistance
- constant current
- switch
- voltage
- 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 description 3
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Measurement Of Resistance Or Impedance (AREA)
- Contacts (AREA)
Description
第１図は本考案接点抵抗測定装置の実施例を示
すブロツク図、第２図は接点抵抗測定のゼネナル
フローチヤート、第３図は接触抵抗測定プログラ
ムのフローチヤートである。
１……定電流回路、２……切替器、３……被測
定スイツチ、４……接触子、５……差動増幅器、
６……Ａ／Ｄコンバータ、７……マイクロコンピ
ユータ。
FIG. 1 is a block diagram showing an embodiment of the contact resistance measuring device of the present invention, FIG. 2 is a general flowchart of contact resistance measurement, and FIG. 3 is a flowchart of a contact resistance measurement program. 1... Constant current circuit, 2... Switch, 3... Switch to be measured, 4... Contact, 5... Differential amplifier,
6...A/D converter, 7...microcomputer.
Claims (1)
る電流接触子に一定電流を流す定電流源と、この
定電流源の極性を反転させる切替器と、前記接点
に接触する電圧接触子に接続された差動増幅器と
、差動増幅器の出力に接続された正負両極性の変
換が可能なＡ／Ｄコンパータと、電流源の極性を
反転して、それぞれ測定した前記Ａ／Ｄコンバー
タの両出力電圧 ＥＯＵＴ１＝Ａ（Ｉ・ＲＣ＋ＶＤ）及びＥＯ
ＵＴ２＝Ａ（−Ｉ・ＲＣ＋ＶＤ） を演算する手段と、両出力電圧の差の平均値 ＥＯＵＴ＝Ａ・Ｉ・ＲＣ より接触抵抗ＲＣを演算する手段よりなる接点抵
抗測定装置。 但し Ｉは測定電流 Ａは差動増幅器の電圧利得 ＲＣは接点の接触抵抗 ＶＣは同相誤差電圧。[Claims for Utility Model Registration] In the measurement of minute contact resistance, there is provided a constant current source that causes a constant current to flow through a current contact that contacts a contact, a switch that reverses the polarity of the constant current source, and a switch that makes contact with the contact. A differential amplifier connected to the voltage contact of Both output voltages of /D converter EOUT 1 = A (I・RC+VD) and EO
A contact resistance measuring device comprising means for calculating UT 2 =A(-I·RC+VD) and means for calculating contact resistance RC from the average value of the difference between both output voltages EOUT=A·I·RC. However, I is the measurement current, A is the voltage gain of the differential amplifier, RC is the contact resistance of the contacts, and VC is the common mode error voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18609784U JPS61102876U (en) | 1984-12-10 | 1984-12-10 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18609784U JPS61102876U (en) | 1984-12-10 | 1984-12-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61102876U true JPS61102876U (en) | 1986-06-30 |
Family
ID=30743560
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18609784U Pending JPS61102876U (en) | 1984-12-10 | 1984-12-10 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61102876U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01195372A (en) * | 1988-01-29 | 1989-08-07 | Chino Corp | Current and voltage measuring instrument |
-
1984
- 1984-12-10 JP JP18609784U patent/JPS61102876U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01195372A (en) * | 1988-01-29 | 1989-08-07 | Chino Corp | Current and voltage measuring instrument |
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