CN105785131A - Testing device and method for low ohm chip resistors - Google Patents

Testing device and method for low ohm chip resistors Download PDF

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Publication number
CN105785131A
CN105785131A CN201610251101.5A CN201610251101A CN105785131A CN 105785131 A CN105785131 A CN 105785131A CN 201610251101 A CN201610251101 A CN 201610251101A CN 105785131 A CN105785131 A CN 105785131A
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CN
China
Prior art keywords
resistance
measured
precision
low resistance
low
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Pending
Application number
CN201610251101.5A
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Chinese (zh)
Inventor
杨光明
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Langchao Electronic Information Industry Co Ltd
Inspur Electronic Information Industry Co Ltd
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Langchao Electronic Information Industry Co Ltd
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Priority to CN201610251101.5A priority Critical patent/CN105785131A/en
Publication of CN105785131A publication Critical patent/CN105785131A/en
Pending legal-status Critical Current

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Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G01R27/08Measuring resistance by measuring both voltage and current

Abstract

The invention discloses a testing device and method for low ohm chip resistors, belongs to the technical field of electronic components, and aims to solves the technical problem of accurately measuring the accurate resistance of a low ohm chip resistor when no special chip resistor tester is available. The testing device comprises a DC power supply, a current meter, a low ohm chip resistor to be tested and a multi-meter, wherein the DC power supply, the current meter and the low ohm chip resistor to be tested are serially connected to form a series loop, the multi-meter is parallelly connected with the serially connected current meter and the low ohm chip resistor to be tested. The method includes the steps of presetting the resistance value R<fixed> of the current meter and the voltage value V of the DC power supply, connecting the circuit, and the current meter measuring and displaying the current value I1 passing the low ohm chip resistor to be tested.

Description

A kind of test device and method of low resistance precision resistance
Technical field
The present invention relates to technical field of electronic components, specifically the test device and method of a kind of low resistance precision resistance.
Background technology
Resistance is a kind of common electronic devices and components, along with the update of electronic product, constantly the precision of resistance and reliability is proposed new requirement, increasingly trends towards small size, the demand of high-power resistance simultaneously.Conventional resistance, because resistance and source of error, correct amount its resistance can be measured with conventional common test instrunment, but when running into low resistance precision resistance, the such as precision resistance of milliohm level, common equipment is because of the error in measurement of self, it is impossible to accurately measure the exact value of low resistance precision resistance, how can under the premise not having Special precision resistance meter, can accurately measure the accurate resistance surveying low resistance precision resistance is be badly in need of in currently available technology solving the technical problem that.
The patent documentation that the patent No. is CN105021944A discloses a kind of low resistance connectivity testing device and method.Described low resistance connectivity testing device includes: signal detection module, for circuit-under-test accesses series connection bleeder circuit, and obtains sampled voltage signal from the sampling resistor of described series connection bleeder circuit and exports;Amplification circuit module, is connected with signal detection module, is used for receiving described sampled voltage signal, is amplified by preset ratio by described sampled voltage signal through difference scaling circuit, the sampled voltage signal that output is amplified;Control circuit module, it is connected with amplification circuit module, for the sampled voltage signal being received amplification is carried out processing of circuit, when the sampled voltage signal of described amplification carries out processing of circuit, when the sampled voltage signal of described amplification is in predetermined voltage range, export the first level.This technical scheme exists that structure complexity, error be big, high in cost of production shortcoming.
Summary of the invention
The technical assignment of the present invention is to provide the test device and method of a kind of low resistance precision resistance, and how solve can under the premise not having Special precision resistance meter, the problem that can accurately measure the accurate resistance surveying low resistance precision resistance.
The technical assignment of the present invention realizes in the following manner, a kind of test device of low resistance precision resistance, this device includes DC power supply (DCPowerSupply), DC load instrument (CuurentMeter), low resistance precision resistance to be measured (LowOhmChipResistor) and circuit tester (Multi-meter), DC power supply, DC load instrument and low resistance precision resistance to be measured are sequentially connected in series series loop, circuit tester with connect after DC load instrument in parallel with low resistance precision resistance to be measured.Wherein, DC load instrument is utilized to measure the current value by low resistance precision resistance to be measured, circuit tester is utilized to measure DC load instrument and the voltage at low resistance precision resistance two ends to be measured, DC load instrument and the total resistance of low resistance precision resistance to be measured is calculated by voltammetry, deduct the default resistance of DC load instrument by total resistance and just can obtain the resistance of low resistance precision resistance to be measured, complete the measurement of the resistance of low resistance precision resistance to be measured.
As preferably, described DC load instrument adopts fixed resistance to substitute with galvanometer series circuit.
A kind of method of testing of low resistance precision resistance, the step of the method is as follows:
(1), the resistance value R of predetermined DC load meterGuAnd the magnitude of voltage V of DC power supply;
(2), connecting circuit, the current value I by low resistance precision resistance to be measured is measured and demonstrated to DC load instrument1
(3) circuit tester, is utilized to measure the magnitude of voltage V of DC load instrument and low resistance precision resistance two ends to be measured1
(4) voltammetry, is utilized to calculate resistance value R total after DC load instrument is connected with low resistance precision resistance to be measuredAlways, i.e. RAlways=V1/I1
(5) resistance value R total after, the DC load instrument calculated in step (4) being connected with low resistance precision resistance to be measuredAlwaysDeduct the resistance value R of the DC load instrument preset in step (1)Gu, obtain the resistance R of low resistance precision resistance to be measuredX, i.e. RX=RAlways-RGu.The resistance of milliohm level precision low resistance resistance can be measured by said method accurately, substantially increase work efficiency.
As preferably, adjusting the resistance value R of predetermined DC load meter in described step (1)GuAnd the magnitude of voltage V of DC power supply, measure many group current value I1With many group magnitude of voltage V1, utilize voltammetry to calculate the resistance organizing low resistance precision resistance to be measured, respectively R moreX1、RX2···RXn, calculate RX1、RX2、···RXnMeansigma methods as the resistance R of low resistance precision resistance to be measuredX, i.e. RX=(RX1+RX2+···+RXn)/n.By the mode averaged, more accurately measure the resistance of milliohm level precision low resistance resistance, greatly reduce measurement error.
The test device and method of a kind of low resistance precision resistance of the present invention has the advantage that
1, the present invention is directed to the measurement problem of the precision resistance resistance of milliohm level, under the premise lacking Special precision resistance meter, utilize conventional device resource, build the test device of low resistance precision resistance, correct amount measures the resistance of low resistance precision resistance, the resistance not only solving milliohm level precision low resistance resistance in prior art measures problem, and cost is low, simple to operate, quick, substantially increases the measurement efficiency of resistance to milliohm level precision low resistance resistance;
2, the present invention is composed in series loop by low resistance precision resistance to be measured, fixed resistance value resistance and galvanometer and DC load instrument, DC power supply, adjust the output voltage of DC power supply, fixed resistance and the voltage at low resistance precision resistance two ends to be measured is measured with circuit tester, in conjunction with the current value that galvanometer reads, total resistance of fixed resistance and low resistance precision resistance to be measured is calculated by voltammetry, the resistance deducting fixed resistance just can draw the accurate resistance of precision resistance, and the method is more accurately than the resistance of directly measurement precision resistance;
3, the measurement apparatus of the present invention and measuring method are not only simple and practical, precisely reliably, and reduce testing cost, improve testing efficiency.
The present invention has reasonable in design, simple in construction, the features such as processing, little, easy to use, the one-object-many-purposes of volume that are prone to, thus, have good value for applications.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is further described.
Accompanying drawing 1 is the schematic diagram of embodiment 1;
Accompanying drawing 2 is the schematic diagram of embodiment 2.
In figure: 1, DC power supply, 2, fixed resistance and galvanometer series circuit, 3, low resistance precision resistance to be measured, 4, circuit tester, 5, DC load instrument.
Detailed description of the invention
With reference to Figure of description and specific embodiment, the test device and method of a kind of low resistance precision resistance of the present invention is described in detail below.
Embodiment 1:
As shown in Figure 1, a kind of test device of the low resistance precision resistance of the present invention, this device includes DC power supply 1, DC load instrument 5, low resistance precision resistance 3 to be measured and circuit tester 4, DC power supply 1, DC load instrument 5 and low resistance precision resistance 3 to be measured are sequentially connected in series series loop, utilize DC load instrument 5 to measure the current value by low resistance precision resistance 3 to be measured;Circuit tester 4 with connect after DC load instrument 5 in parallel with low resistance precision resistance 3 to be measured, utilize circuit tester to measure DC load instrument 5 and the voltage at low resistance precision resistance 3 two ends to be measured.
Embodiment 2:
As shown in Figure 2, a kind of test device of the low resistance precision resistance of the present invention, this device includes DC power supply 1, fixed resistance and galvanometer series circuit 2, low resistance precision resistance 3 to be measured and circuit tester 4, DC power supply 1, fixed resistance and galvanometer series circuit 2 and low resistance precision resistance 3 to be measured are sequentially connected in series series loop, utilize fixed resistance to go out the current value by low resistance precision resistance 3 to be measured with the amperometric measurement in galvanometer series circuit 2;Circuit tester 4 with connect after fixed resistance in parallel with low resistance precision resistance 3 to be measured with galvanometer series circuit 2, utilize circuit tester to measure the voltage at fixed resistance and galvanometer series circuit 2 and low resistance precision resistance 3 two ends to be measured.
Embodiment 3:
A kind of method of testing of low resistance precision resistance, the step of the method is as follows:
(1), the resistance value R of predetermined DC load meterGuAnd the magnitude of voltage V of DC power supply;
(2), connecting circuit, the current value I by low resistance precision resistance to be measured is measured and demonstrated to DC load instrument1
(3) circuit tester, is utilized to measure the magnitude of voltage V of DC load instrument and low resistance precision resistance two ends to be measured1
(4) voltammetry, is utilized to calculate resistance value R total after DC load instrument is connected with low resistance precision resistance to be measuredAlways, i.e. RAlways=V1/I1
(5) resistance value R total after, the DC load instrument calculated in step (4) being connected with low resistance precision resistance to be measuredAlwaysDeduct the resistance value R of the DC load instrument preset in step (1)Gu, obtain the resistance R of low resistance precision resistance to be measuredX, i.e. RX=RAlways-RGu
Adjust the resistance value R of predetermined DC load meter in described step (1)GuAnd the magnitude of voltage V of DC power supply, measure many group current value I1With many group magnitude of voltage V1, utilize voltammetry to calculate the resistance organizing low resistance precision resistance to be measured, respectively R moreX1、RX2···RXn, calculate RX1、RX2、···RXnMeansigma methods as the resistance R of low resistance precision resistance to be measuredX, i.e. RX=(RX1+RX2+···+RXn)/n。
By detailed description of the invention above, described those skilled in the art can be easy to realize the present invention.It is understood that the present invention is not limited to above-mentioned three kind detailed description of the invention.On the basis of disclosed embodiment, described those skilled in the art can the different technical characteristic of combination in any, thus realizing different technical schemes.
Except the technical characteristic described in description, it is the known technology of those skilled in the art.

Claims (4)

1. the test device of a low resistance precision resistance, it is characterized in that: this device includes DC power supply, DC load instrument, low resistance precision resistance to be measured and circuit tester, DC power supply, DC load instrument and low resistance precision resistance to be measured are sequentially connected in series series loop, circuit tester with connect after DC load instrument in parallel with low resistance precision resistance to be measured.
2. the test device of a kind of low resistance precision resistance according to claim 1, it is characterised in that: described DC load instrument adopts fixed resistance to substitute with galvanometer series circuit.
3. the method for testing of a low resistance precision resistance, it is characterised in that: the step of the method is as follows:
(1), the resistance value R of predetermined DC load meterGuAnd the magnitude of voltage V of DC power supply;
(2), connecting circuit, the current value I by low resistance precision resistance to be measured is measured and demonstrated to DC load instrument1
(3) circuit tester, is utilized to measure the magnitude of voltage V of DC load instrument and low resistance precision resistance two ends to be measured1
(4) voltammetry, is utilized to calculate resistance value R total after DC load instrument is connected with low resistance precision resistance to be measuredAlways, i.e. RAlways=V1/I1
(5) resistance value R total after, the DC load instrument calculated in step (4) being connected with low resistance precision resistance to be measuredAlwaysDeduct the resistance value R of the DC load instrument preset in step (1)Gu, obtain the resistance R of low resistance precision resistance to be measuredX, i.e. RX=RAlways-RGu
4. the method for testing of a kind of low resistance precision resistance according to claim 3, it is characterised in that: adjust the resistance value R of predetermined DC load meter in described step (1)GuAnd the magnitude of voltage V of DC power supply, measure many group current value I1With many group magnitude of voltage V1, utilize voltammetry to calculate the resistance organizing low resistance precision resistance to be measured, respectively R moreX1、RX2···RXn, calculate RX1、RX2、···RXnMeansigma methods as the resistance R of low resistance precision resistance to be measuredX, i.e. RX=(RX1+RX2+···+RXn)/n。
CN201610251101.5A 2016-04-21 2016-04-21 Testing device and method for low ohm chip resistors Pending CN105785131A (en)

Priority Applications (1)

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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610251101.5A CN105785131A (en) 2016-04-21 2016-04-21 Testing device and method for low ohm chip resistors

Publications (1)

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CN105785131A true CN105785131A (en) 2016-07-20

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108535535A (en) * 2018-04-02 2018-09-14 郑州云海信息技术有限公司 A kind of current detection method and system for integrated chip
CN109001536A (en) * 2018-06-05 2018-12-14 武汉电信器件有限公司 A kind of resistance detection circuit, system and method

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102565538A (en) * 2012-02-28 2012-07-11 上海华力微电子有限公司 Method for enhancing resistance testing accuracy

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102565538A (en) * 2012-02-28 2012-07-11 上海华力微电子有限公司 Method for enhancing resistance testing accuracy

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
汪学勤等: "《全国供用电工人技能培训教材 电气试验与油化试验 初级工》", 30 June 1999 *
陈立周等: "《电气测量》", 31 January 2016 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108535535A (en) * 2018-04-02 2018-09-14 郑州云海信息技术有限公司 A kind of current detection method and system for integrated chip
CN109001536A (en) * 2018-06-05 2018-12-14 武汉电信器件有限公司 A kind of resistance detection circuit, system and method

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Application publication date: 20160720