JPH0431774A - Circuit of digital resistance measuring apparatus - Google Patents
Circuit of digital resistance measuring apparatusInfo
- Publication number
- JPH0431774A JPH0431774A JP13807090A JP13807090A JPH0431774A JP H0431774 A JPH0431774 A JP H0431774A JP 13807090 A JP13807090 A JP 13807090A JP 13807090 A JP13807090 A JP 13807090A JP H0431774 A JPH0431774 A JP H0431774A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- resistor
- converter
- voltage
- current
- 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
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 230000006866 deterioration Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
（イ）産業上の利用分野
この発明は、主として電気設備及電気機器等の絶線抵抗
等の測定をデジタル式に測定せんとする測定器に関する
１口）従来の技術
従来この種測定器に於て先づ第一に必要な亭は使用電源
の変動に対して測定器の測定値が影響されない事である
。そのためこの種電気抵抗測定器に於ては定電流回路を
用ひて被測定抵抗に一定電流を流し而して其の抵抗の両
端の電圧を測定する事により其の抵抗値を知り得て居た
。しかしこの方法では定電流回路部品の特性の経年劣化
により一定電流に変化が生じ、これが誤差の原因にある
欠点があった。DETAILED DESCRIPTION OF THE INVENTION (A) Field of Industrial Application This invention mainly relates to a measuring instrument that digitally measures the insulation resistance of electrical equipment, electrical equipment, etc. (1) Conventional technology Conventionally, the first requirement for this type of measuring instrument is that the measured value of the measuring instrument is not affected by fluctuations in the power supply used. Therefore, in this type of electrical resistance measuring instrument, the resistance value can be determined by using a constant current circuit to flow a constant current through the resistance to be measured and measuring the voltage across the resistance. Ta. However, this method has the disadvantage that the constant current changes due to aging deterioration of the characteristics of the constant current circuit components, which causes errors.
ｅ＼）発明が解決しようとする問題点
この発明は定電流回路を使用しない他の簡単な方法で正
確で安定な抵抗測定器を得んとするものである。e\) Problems to be Solved by the Invention The present invention attempts to obtain an accurate and stable resistance measuring device using another simple method that does not use a constant current circuit.
に）問題点を解決するための手段
この発明な絶線抵抗測定器としての実施例を図面にもと
づいて説明すれば次の通である。被測定抵抗ＲＸ７に直
列に電流電圧コンバーターとして抵抗ＲＡ１を接続した
回路と抵抗ＲＣｓと直列に電流電圧コンバーターとして
抵抗ＲＨ２を接続せる回路を互に並列に接続し其の並列
回路の両端用、１６に直流電圧を加へる而して抵抗ＲＢ
２の両端に生ずる電圧は任意回路９をへてＡＤコンバー
ターＵのアナログ入力口に加へ而して抵抗Ａ１の両端に
生ずる電圧は任意回路１０をへて該ＡＤコンバーターＵ
の謂る基準電圧入力Ｍへ加へ而して該ＡＤコンバーター
Ｈの出力にはデジタル表示器νを接続する←）作 用
図面にもとづいて作用を説明すると該並列回路の両端塾
、１６に直流電圧Ｖを加へる事により抵抗ＲＡ、の両端
に生する電圧を■ムとし抵抗ＲＩ３．の両端に生ずる電
圧をＶＢとすれば
ＶＲａ ＶＲＢ
Ｖム”ＲＸ＋Ｒｈ ＶＢ＝正曹［ｎ となる−船釣に
謂る基準電圧回路を有するＡＤコンバーターに於ては其
のデジタル出力りは其のアナログ入力電圧を基礎表示値
以上は被測定抵抗すに比例して変化する数比較的高抵抗
の測定には好都合である。B) Means for Solving the Problems An embodiment of the inventive disconnection resistance measuring device will be described below with reference to the drawings. A circuit in which a resistor RA1 is connected as a current-voltage converter in series with the resistor to be measured RX7 and a circuit in which a resistor RH2 is connected as a current-voltage converter in series with the resistor RCs are connected in parallel with each other, and a circuit for both ends of the parallel circuit is connected to 16. By applying a DC voltage, the resistance RB
The voltage generated across the resistor A1 is applied to the analog input port of the AD converter U via an arbitrary circuit 9, and the voltage generated across the resistor A1 is applied via an arbitrary circuit 10 to the analog input port of the AD converter U.
A digital display ν is connected to the so-called reference voltage input M and to the output of the AD converter H. ←) Operation To explain the operation based on the drawing, direct current is applied to both ends of the parallel circuit, 16. By applying the voltage V, the voltage generated across the resistor RA is reduced to the resistor RI3. If VB is the voltage generated across the terminals of When the input voltage exceeds the basic display value, it changes in proportion to the resistance to be measured, which is convenient for measuring relatively high resistances.
（へ）発明の効果
この発明は定電流回路を除去して構造が簡単になる上定
電流回路の特性劣化に起因する不都合も無くなり長期間
安定した測定作業が可能である。(F) Effects of the Invention This invention not only simplifies the structure by eliminating the constant current circuit, but also eliminates the inconvenience caused by deterioration of the characteristics of the constant current circuit, making it possible to perform stable measurement operations over a long period of time.
図面に於て８は電池４はスイッチＵはＡＤコンパ−ター
ルはデジタル表示器５は直流昇圧器、ｗ、１６は並列回
路の両端の電圧附加端子、６は任意抵抗、７は被測定抵
抗ＲＸ、 ８は任意抵抗ＲＣ，１は電流電圧コンバータ
ーとしての抵抗ＲＡ、２も電流電圧フンバーターとして
の抵抗ＲＢ、９．１１）は任意回路、塾はＡＤコンバー
ター■のアナログ入力端子、１４はＡＤコンバーターＵ
の基準電圧入力端子を示すものである。In the drawing, 8 is the battery 4, the switch U is the AD converter, the digital display 5 is the DC booster, w, 16 is the voltage addition terminal at both ends of the parallel circuit, 6 is the arbitrary resistor, and 7 is the resistance to be measured RX. , 8 is an arbitrary resistor RC, 1 is a resistor RA as a current-voltage converter, 2 is also a resistor RB as a current-voltage converter, 9.11) is an arbitrary circuit, cram school is the analog input terminal of the AD converter ■, 14 is the AD converter U
This shows the reference voltage input terminal of .
Claims (1)
＿Ａ１を直列に接続したる回路と抵抗Ｒ＿Ｃ８と任意の
電流電圧コンバーターＲ＿Ｂ２を直列に接続せる回路を
互に並列に接続し、而して該Ｒ＿Ａ１の出力に生ずる電
圧を任意回路１０をへて任意のＡＤコンバーター１１の
謂る基準電圧入力１４に加へ而して該Ｒ＿Ｂ２の出力に
生ずる電圧を任意回路９をへて該ＡＤコンバーター１１
のアナログ入口１３へ加へる回路を有するデジタル抵抗
測定器の回路Resistor to be measured R_X7 and any current-voltage converter R
A circuit that connects _A1 in series, a circuit that connects resistor R_C8 and an arbitrary current-voltage converter R_B2 in series are connected in parallel, and the voltage generated at the output of R_A1 is passed through an arbitrary circuit 10 to an arbitrary voltage. The voltage generated at the output of R_B2 is added to the so-called reference voltage input 14 of the AD converter 11, and the voltage generated at the output of R_B2 is passed through the arbitrary circuit 9 to the AD converter 11.
circuit of a digital resistance meter with a circuit connected to an analog inlet 13 of
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13807090A JPH0431774A (en) | 1990-05-28 | 1990-05-28 | Circuit of digital resistance measuring apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13807090A JPH0431774A (en) | 1990-05-28 | 1990-05-28 | Circuit of digital resistance measuring apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0431774A true JPH0431774A (en) | 1992-02-03 |
Family
ID=15213270
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13807090A Pending JPH0431774A (en) | 1990-05-28 | 1990-05-28 | Circuit of digital resistance measuring apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0431774A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05288785A (en) * | 1992-04-14 | 1993-11-02 | Terushi Sakurai | Circuit of digital resistance measuring equipment |
| CN109444553A (en) * | 2019-01-07 | 2019-03-08 | 山东建筑大学 | Conductor jointer resistance measurement method and measuring system |
-
1990
- 1990-05-28 JP JP13807090A patent/JPH0431774A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05288785A (en) * | 1992-04-14 | 1993-11-02 | Terushi Sakurai | Circuit of digital resistance measuring equipment |
| CN109444553A (en) * | 2019-01-07 | 2019-03-08 | 山东建筑大学 | Conductor jointer resistance measurement method and measuring system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Cutkosky | An ac resistance thermometer bridge | |
| JPH0431774A (en) | Circuit of digital resistance measuring apparatus | |
| JPH1172529A (en) | Insulation resistance measurement instrument for capacitor | |
| JPS5928866B2 (en) | Instantaneous power measurement circuit | |
| JPH0641174Y2 (en) | Voltage-current measuring device | |
| US2872643A (en) | Electrical measuring instrument | |
| JP3048377B2 (en) | Grain moisture meter | |
| JP3106459B2 (en) | Electricity generator | |
| JP3189866B2 (en) | Resistance meter calibration device | |
| JP2001333891A (en) | Equipment for measuring biological impedance | |
| JP3135448B2 (en) | Electric quantity measuring device | |
| JPS6111655Y2 (en) | ||
| JP3199284B2 (en) | Power measurement value addition circuit | |
| SU978055A1 (en) | Current to voltage converter | |
| SU855919A1 (en) | Device for limiting synchronous generator excitation | |
| JP3461258B2 (en) | Apparatus for measuring conductivity or pH | |
| JPS601428Y2 (en) | Insulation resistance tester | |
| JPH0514935U (en) | Watt meter | |
| SU636559A1 (en) | Digital integrating meter of resistor ratio | |
| JPH057583Y2 (en) | ||
| JPS6037680Y2 (en) | measuring device | |
| JPH01193659A (en) | Circuit for digital resistance measuring apparatus | |
| SU568898A1 (en) | Quasi-bridge resistance meter | |
| RU2206900C1 (en) | Technique measuring thermal resistance of two-terminal networks | |
| SU1551978A1 (en) | Device for measuring signals of strain bridge |