KR920006389B1 - Four port type tester - Google Patents

Four port type tester Download PDF

Info

Publication number
KR920006389B1
KR920006389B1 KR1019890017696A KR890017696A KR920006389B1 KR 920006389 B1 KR920006389 B1 KR 920006389B1 KR 1019890017696 A KR1019890017696 A KR 1019890017696A KR 890017696 A KR890017696 A KR 890017696A KR 920006389 B1 KR920006389 B1 KR 920006389B1
Authority
KR
South Korea
Prior art keywords
measuring
cable
measuring device
sample
measured
Prior art date
Application number
KR1019890017696A
Other languages
Korean (ko)
Other versions
KR910010192A (en
Inventor
박찬현
Original Assignee
현대전자산업주식회사
정몽헌
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 현대전자산업주식회사, 정몽헌 filed Critical 현대전자산업주식회사
Priority to KR1019890017696A priority Critical patent/KR920006389B1/en
Publication of KR910010192A publication Critical patent/KR910010192A/en
Application granted granted Critical
Publication of KR920006389B1 publication Critical patent/KR920006389B1/en

Links

Images

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
    • G01R1/38—Arrangements for altering the indicating characteristic, e.g. by modifying the air gap

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Resistance Or Impedance (AREA)

Abstract

A four terminal type measuring device includes a measuring body comprising a DC power source and a detector, and a cable connected to both DC power source and detector to send the value measured to the detector. The cable includes a matcher, and four terminals are formed between the measuring body and the macher. The length between the matcher and the probes is very short, so that remove line resistance and impedance error. The measuring device is able to measure impedance accurately regardless of length and state of cable for measurment.

Description

4단자 방식 계측장치4-terminal measuring device

제1a도는 종래기술에 따른 2단자 방식 계측장치의 구성도.Figure 1a is a block diagram of a two-terminal measuring device according to the prior art.

제1b도는 제1도 계측장치의 내부등가회로도.Figure 1b is an internal equivalent circuit diagram of the measuring device of Figure 1;

제1c도는 고주파 전송선로를 측정하기 위한 내부등가회로도.1C is an internal equivalent circuit diagram for measuring a high frequency transmission line.

제2a도는 본 발명에 따른 4단자 방식 계측 장치의 구성도.2a is a block diagram of a four-terminal measuring device according to the present invention.

제2b도는 저항을 측정하기 위한 제2a도 계측장치의 내부등가회로도.FIG. 2b is an internal equivalent circuit diagram of the measurement device of FIG. 2a for measuring resistance.

제3도는 본 발명의 측정장치에 이용되는 측정용 케이블을 도시한 도면이다.3 is a diagram showing a measuring cable used in the measuring apparatus of the present invention.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

10 : 측정장치 20 : 전류원10: measuring device 20: current source

30 : 검출부 40 : 정합장치30 detection unit 40 matching device

50 : 측정용 케이블 51 : 전류원 콘넥터50: measuring cable 51: current source connector

52 : 검출입력 콘덱터 53A,53B : 탐침52: detection input condenser 53A, 53B: probe

본 발명은 직류전원에 의한 저항 및 고주파에서의 임피던스를 측정하기 위한 4단자 방식 계측장치에 관한것이다.The present invention relates to a four-terminal measuring device for measuring the resistance by a DC power supply and the impedance at high frequency.

저항값을 측정하거나 고주파에 의한 회로망의 임피던스를 측정하기 위한 종래의 계측기는 제1a도에 도시한 바와같이 계측기(1)의 내부에 직류전류원(2)과 검출부(3) 및 정합장치(4)가 내장되어 있었던바, 이러한 계측기에 연결된 각각의 측정탐침(5a,5b)에는 제1b도와 같이 선저항(1/2 ri)이 각각 분포하게 되어 실제의 저항(R)값을 측정하게 될 경우 계측기(1)의 내부에 있는 검출부(3)에 나타나는 저항값은 피측정 저항값 R과 선저항 ri가 포함된 R+ri가 된다. 또한, 제1c도와 같이 고주파 전류원(6)을 이용하는 회로망 분석에 있어서, 측정 탐침(5a,5b)에 분포된 R,L,C에 의한 임피던스 오차(Zi)가 실제의 피측정임피던스(Z)에 부가되어 전달지연과 비정합에 의한 리액턴스 오차를 야기시켜 계측기(1)의 내부에 있는 검출부(7)에는 Z+Zi가 표시되므로 정밀한 분석이 곤란하였었다. 특히, 고주파를 이용하는 회로망 분석시에 있어서의 임피던스 오차(Zi)의 영항은 직류 전류원(2)을 이용한 단순한 저항치 오차(ri)의 영향보다 흴씬 심각하여 현재 고정확도의 회로망 분석에 있어서는 입력 연결단을 최대한으로 단축시켜 오차를 줄이는 방법이 강구되고 있으나 시료에의 접속이 제한되어 매우 불편한 결점이 있었다.Conventional measuring instruments for measuring the resistance value or the impedance of the network by high frequency, as shown in Fig. 1a, the DC current source 2, the detector 3 and the matching device 4 inside the instrument 1 In this case, each of the measuring probes 5a and 5b connected to the measuring instrument is distributed with a line resistance 1/2 ri as shown in FIG. The resistance value shown in the detection part 3 inside (1) becomes R + ri including the resistance value R to be measured and the line resistance ri. In addition, in the network analysis using the high frequency current source 6 as shown in FIG. In addition, Z + Zi is displayed on the detection unit 7 inside the measuring instrument 1 because it causes a reactance error due to transmission delay and mismatch. Therefore, accurate analysis was difficult. In particular, the influence of impedance error (Zi) in the analysis of the network using high frequency is much more serious than the effect of the simple resistance error (ri) using the DC current source (2). A method of reducing the error by shortening it to the maximum has been devised, but the connection to the sample has been limited, resulting in a very inconvenient drawback.

따라서, 본 발명은 이러한 사정을 감안하여 전류원과 검출부만을 계측기에 내장하고, 정합장치는 계측기에서 분리시킴으로써 측정용 탐침 길이에 의한 라인손실 및 비정합시 발생되는 오차를 제거하기 위한 4단자방식 계측장치를 제공하는데 그 목적이 있다. 이러한 목적을 달성하기 위한 본 발명은 저항값과 고주파 전송선로의 임피던스와 같은 피측정시료값을 측정하기 위한 전원을 공급하기 위한 직류 전류원과, 측정 결과를 표시하기 위한 검출부를 내장한 측정 동체와, 측정동체를 피측정 시료에 연결하여 피측정시료의 값을 측정동체의 검출부에 제공하기 위한 측정용 케이블로 구성시켜서 된것이다.Therefore, in view of the above situation, the present invention incorporates only a current source and a detection unit into the measuring instrument, and the matching device is separated from the measuring instrument. The purpose is to provide. The present invention for achieving the object of the present invention includes a measuring body having a DC current source for supplying power for measuring a sample value to be measured, such as a resistance value and impedance of a high frequency transmission line, and a detection unit for displaying a measurement result; It consists of a measuring cable for connecting the measuring body to the sample under test and providing the value of the sample under test to the detection unit of the measuring body.

이하, 본 발명을 첨부된 도면에 의거하여 상세히 설명하면 다음과 같다. 제2a도는 본 발명에 따른 4단자방식 측정장치의 구성도인바, 측정장치(10)의 내부에는 직류전류원(20)과 검출부(30)만이 내장되며, 제1a도의 정합장치(4)와 유사한 정합장치(40)는 측정장치와 애덥터식으로 결합 연결 가능하도록 구성된다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. Figure 2a is a block diagram of a four-terminal measuring device according to the present invention, the only inside of the measuring device 10 is a DC current source 20 and the detection unit 30, a matching similar to the matching device 4 of Figure 1a The device 40 is configured to be coupled to the measuring device in an annular manner.

제3도에는 본 발명에 이용되는 측정용 케이블(50)을 도시한 것인바, 전류원 콘넥터(51)은 전류원(20)에 연결되고, 검출입력 콘넥터(52)는 검출부(30)의 입력단에 연결되도록 하였다. 여기에서 전류원 및 검출 입력 콘넥터(51,52)는 측정장치(10)에서 접지되어야 하며, 이들 콘넥터(51,52)의 외피는 비닐이나 플라스틱(54)으로 형성된다. 정합장치(40)측에서는 제3도의 결선 상태와 같이 합치되어야 한다.Figure 3 shows the measurement cable 50 used in the present invention, the current source connector 51 is connected to the current source 20, the detection input connector 52 is connected to the input terminal of the detector 30 It was made. Here, the current source and the detection input connectors 51, 52 should be grounded at the measuring device 10, and the shell of these connectors 51, 52 is formed of vinyl or plastic 54. On the matching device 40 side, it must match as shown in FIG.

즉, 측정장치(10)로부터 정합장치(40)까지는 4단자로서 각각의 단자간에 독립성이 보장되어야 하며, 정합장치(40)로부터 탐침(53A,53B)까지는 2단자로서 극히 짧게하여야 한다. 그 이유는 탐침(53A,53B)으로부터 정합장치(40)까지의 길이에 의한 저항 오차 및 임피던스 오차를 제거하기 위해서이다.That is, the independence between each terminal should be guaranteed as four terminals from the measuring device 10 to the matching device 40, and the shortening should be extremely short as two terminals from the matching device 40 to the probes 53A and 53B. The reason is to eliminate the resistance error and the impedance error due to the length from the probes 53A and 53B to the matching device 40.

제2a도 밋 제3도와 같은 구성으로 된 계측장치의 내부 등가회로는 제2b도에 도시하였는바, 이 경우 전류원에 의해 얻어지는 전압분포는 저항(R) 및 선저항(ri)으로 분기되므로 측정입력 단자는 저항(R)에 의한 전압강하단을 검출하여 선저항(ri)오차가 제거된 고정확도의 측정이 가능하게 된다. 또한 고주파에서의 임피던스 측정시에도 전류원과 검출입력을 제2(a)도와 같이 분리구성하여 전류원 신호경로 2단자 및 검출입력 2단자를 분리함으로서 종래 기술에서와 같은 오차가 제거된 고정도의 임피던스를 측정할 수 있게 된다.The internal equivalent circuit of the measuring device having the configuration as shown in FIG. 2a and FIG. 3 is shown in FIG. 2b. In this case, since the voltage distribution obtained by the current source is branched into the resistor R and the line resistance ri, the measurement input The terminal detects the voltage drop end caused by the resistor R, thereby making it possible to measure the high accuracy in which the line resistance ri error is eliminated. In addition, when measuring impedance at a high frequency, the current source and the detection input are separated and configured as shown in FIG. You can do it.

전술한 바와같이 본 발명에 따른 4단자 방식 계측장치는 측정시 사용하는 측정용 케이블의 길이 및 상태에 관계없이 라인 손실 및 비정합에 의한 오차를 제거하여 정밀한 측정을 할 수 있는 효과를 지닌것이다.As described above, the four-terminal measuring device according to the present invention has an effect of making accurate measurement by removing errors due to line loss and mismatch, regardless of the length and state of the measuring cable used for measurement.

Claims (2)

4단자 방식 측정장치에 있어서, 저항값과 고주파 전송선로의 임피던스와 같은 피측정 시료값을 측정하는데 필요한 전원을 공급하기 위한 직류전원(20)과 측정결과를 표시하기 위한 검출부(30)를 내장한 측정동체(10)와; 상기의 측정동체(10)를 피측정시료에 전기적으로 연결시켜 피측정 시료의 값을 상기 측정동체(10)의 검출부(30)에 제공하기 위해 상기 직류 전원(20)과 상기 검출부(30)에 연결되는 측정용 케이블(50)을 구비한 것을 특징으로 하는 4단자 방식 측정장치.A four-terminal measuring device comprising a built-in DC power supply 20 for supplying power required for measuring a sample value to be measured, such as a resistance value and an impedance of a high frequency transmission line, and a detection unit 30 for displaying a measurement result. A measuring body 10; The DC power source 20 and the detection unit 30 to electrically connect the measuring body 10 to the sample to be measured so as to provide a value of the sample to be measured to the detecting unit 30 of the measuring body 10. Four-terminal measuring device characterized in that it comprises a measuring cable 50 to be connected. 제1항에 있어서, 상기의 측정용 케이블(50)은, 정합장치(40)를 포함하고 측정장치로부터 정합장치(40)까지는 4단자로 구성하며, 피측정시료에 연결되는 탐침(53A,53B)과 정합장치(40)간의 길이는 선저항 및 임피던스 오차를 제거하기 의해 매우 짧도록 형성시킴을 특징으로 하는 4단자 방식 측정장치.The measuring cable (50) according to claim 1, wherein the measuring cable (50) includes a matching device (40) and consists of four terminals from the measuring device to the matching device (40), and the probes 53A and 53B connected to the sample to be measured. ) And the length of the matching device 40 is formed to be very short by eliminating the line resistance and impedance error.
KR1019890017696A 1989-11-30 1989-11-30 Four port type tester KR920006389B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019890017696A KR920006389B1 (en) 1989-11-30 1989-11-30 Four port type tester

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019890017696A KR920006389B1 (en) 1989-11-30 1989-11-30 Four port type tester

Publications (2)

Publication Number Publication Date
KR910010192A KR910010192A (en) 1991-06-29
KR920006389B1 true KR920006389B1 (en) 1992-08-03

Family

ID=19292431

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019890017696A KR920006389B1 (en) 1989-11-30 1989-11-30 Four port type tester

Country Status (1)

Country Link
KR (1) KR920006389B1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100461597B1 (en) * 2002-06-25 2004-12-14 주식회사 시그마텔컴 Method for correcting measurement error of high frequency

Also Published As

Publication number Publication date
KR910010192A (en) 1991-06-29

Similar Documents

Publication Publication Date Title
US6768328B2 (en) Single point probe structure and method
US4423373A (en) Test probe
US20100211348A1 (en) Method and apparatus for locating a fault in an electrical conductor, with interference compensation
US5508621A (en) Four-terminal ohmmeter apparatus
US5463323A (en) Impedance meter
US3743925A (en) Adapter for terminating multiconductor signal transmission cable
US20080106277A1 (en) Chip-based prober for high frequency measurements and methods of measuring
ES8704019A1 (en) Method for detecting and obtaining information about changes in variables.
KR920006389B1 (en) Four port type tester
US5336990A (en) Electrical test shunt having dual contact point mating terminals
US4163938A (en) Calibrating device for control stations and indicators
US2030857A (en) Electrical circuit analyzer
US2459197A (en) Method of measuring characteristic impedance of fittings for coaxial connectors
US4804908A (en) Digital meter
CN211928089U (en) Detection device for printed circuit board assembly
Heuermann et al. Results of network analyzer measurements with leakage errors-corrected with direct calibration techniques
CN219935963U (en) Voltage and current measurement channel of digital bridge and digital bridge
US10908183B2 (en) Active probe powered through driven coax cable
CN212723129U (en) Intelligent line load and fault detection device
US3832633A (en) Transistor beta measuring instrument
JP3102709B2 (en) Electronic element measuring device
SU676946A1 (en) Complex impedance remote-measuring device
JPH05322953A (en) Continuation inspection method of a plurality of conductors and connection device used for it
JP2510808Y2 (en) Resistance meter with detachable probe
JPH0587845A (en) One-terminal trio measuring device and two-terminal trio measuring device

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
G160 Decision to publish patent application
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20020716

Year of fee payment: 11

LAPS Lapse due to unpaid annual fee