CN108303591A - Full-automatic D.C. regulated power supply internal resistance measurement instrument - Google Patents
Full-automatic D.C. regulated power supply internal resistance measurement instrument Download PDFInfo
- Publication number
- CN108303591A CN108303591A CN201711035390.6A CN201711035390A CN108303591A CN 108303591 A CN108303591 A CN 108303591A CN 201711035390 A CN201711035390 A CN 201711035390A CN 108303591 A CN108303591 A CN 108303591A
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- CN
- China
- Prior art keywords
- power supply
- resistance
- regulated power
- current sensor
- internal resistance
- 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.)
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/14—Measuring resistance by measuring current or voltage obtained from a reference source
Abstract
A kind of full-automatic D.C. regulated power supply internal resistance measurement instrument, it is made of measurement test pencil P, measurement test pencil Q, current sensor module, digital regulation resistance, compensation resistance R, microcontroller, display module, power supply, integrated regulator, the table can quickly and accurately measure the internal resistance of D.C. regulated power supply, its is simple in structure, stability is good, has stronger practicability.
Description
Technical field
The invention belongs to instrument field, more particularly to a kind of full-automatic D.C. regulated power supply internal resistance measurement instrument.
Background technology
The internal resistance of D.C. regulated power supply can react the performance of power supply, the smaller D.C. regulated power supply of internal resistance, driving load
Ability it is stronger, the internal resistance of D.C. regulated power supply is larger, and power consumption also accordingly increases.In addition, the regulated power supply to break down,
Internal resistance must change with the variation of power source internal circuit structure or component performance.By measuring in D.C. regulated power supply
Resistance, can understand the source of trouble indirectly.So the internal resistance for measuring D.C. regulated power supply is of great significance.Currently, generally passing through reality
The method tested measures the internal resistance of D.C. regulated power supply, and measurement process is loaded down with trivial details, complete one-shot measurement generally require dozens of minutes when
Between, and human factor is more in measurement, and measurement error is larger.
Invention content
The present invention provides a kind of full-automatic D.C. regulated power supply internal resistance measurement in view of the above-mentioned drawbacks of the prior art
Instrument, the table can quickly and accurately measure the internal resistance of D.C. regulated power supply.
The technical solution adopted by the present invention to solve the technical problems is：A kind of full-automatic D.C. regulated power supply internal resistance measurement
Instrument, it is by measurement test pencil P, measurement test pencil Q, current sensor module, digital regulation resistance, compensation resistance R, microcontroller, display mould
Block, power supply, integrated regulator composition, it is characterized in that：P1.1, P1.2, P1.3 pin of microcontroller respectively with digital regulation resistance
PU, PD, ASE pin be connected, microcontroller is connected with display module, the P1.4 pins and current sensor module of microcontroller
Voltage signal output end Vout be connected, integrated regulator is connected by VO pins with the Vref of current sensor module,
There is provided accurately reference voltage for current sensor module, one end of compensation resistance R is connected with test pencil P is measured, the other end and
RH, RW pin of digital regulation resistance are connected, and the RL pins of digital regulation resistance are connected with the IN1 pins of current sensor module
It connects, the IN2 pins of current sensor module are connected with test pencil Q is measured.
The beneficial effects of the invention are as follows：A kind of full-automatic D.C. regulated power supply internal resistance measurement instrument is provided, the table structure letter
Single, precision height, stability are good, have stronger practicability.
Description of the drawings
Fig. 1 is full-automatic D.C. regulated power supply internal resistance measurement instrument circuit structure diagram.
Fig. 2 is tested D.C. regulated power supply equivalent circuit diagram.
IC1, integrated regulator in figure, IC2, microcontroller, IC3, digital regulation resistance, IC4, current sensor module.
Specific implementation mode
It is briefly described as follows measuring principle.For convenience of description, the resistance maximum value of digital regulation resistance is indicated with Rw, quilt
It surveys D.C. regulated power supply internal resistance to be indicated with r, tested D.C. regulated power supply electromotive force is indicated with E.When in measurement D.C. regulated power supply
When resistance, measurement test pencil P, measurement test pencil Q are connected with the output end of tested D.C. regulated power supply respectively, so tested DC voltage-stabilizing
Power supply, compensation resistance R, digital regulation resistance adjustable resistance output end, current sensor current input terminal are connected in series.It is logical
Cross microcontroller control digital regulation resistance, make digital regulation resistance output resistance be maximum value Rw when, according to Ohm's law, pass through by
Survey the total current of D.C. regulated power supply：I=E/ (r+R+Rw)；Digital regulation resistance is controlled by microcontroller, makes digital regulation resistance
When output resistance is zero, by be tested D.C. regulated power supply total current reach maximum value Imax, according to Ohm's law, pass through by
Survey the total current of D.C. regulated power supply：Imax=E/ (r+R)；If n=Imax/I, then n=(r+R+Rw)/(r+R)=1+ Rw/
(r+R), so, r=Rw/ (n-1)-R, Rw, R are known in this formula, n can be controlled by microcontroller current sensor from
After dynamic measurement I, Imax, microcontroller carries out Imax/I operations and obtains, to calculate the value of r.
Microcontroller automatically adjusts the resistance of digital regulation resistance by controlling digital regulation resistance, and by reading current sensor
Output voltage values, be automatically performed the measurement of I, Imax, finally calculate D.C. regulated power supply internal resistance r automatically, and automatically will be straight
The value of stream regulated power supply internal resistance r is shown in display module.
When measuring D.C. regulated power supply internal resistance, need to will only measure test pencil P, measure test pencil Q respectively with tested DC voltage-stabilizing
Two output ends of power supply, which are in contact, can be completed measurement work, other to be not necessarily to manual intervention.
Claims (1)
1. a kind of full-automatic D.C. regulated power supply internal resistance measurement instrument, it is by measurement test pencil P, measurement test pencil Q, current sensor mould
Block, digital regulation resistance, compensation resistance R, microcontroller, display module, power supply, integrated regulator composition, it is characterized in that：Microcontroller
P1.1, P1.2, P1.3 pin are connected with PU, PD, ASE pin of digital regulation resistance respectively, microcontroller and display module phase
Connection, the P1.4 pins of microcontroller are connected with the voltage signal output end Vout of current sensor module, and integrated regulator is logical
It crosses VO pins with the Vref of current sensor module to be connected, accurately reference voltage is provided for current sensor module, compensate
One end of resistance R is connected with test pencil P is measured, and the other end is connected with RH, RW pin of digital regulation resistance, digital regulation resistance
RL pins are connected with the IN1 pins of current sensor module, and the IN2 pins of current sensor module are connected with test pencil Q is measured
It connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711035390.6A CN108303591A (en) | 2017-10-30 | 2017-10-30 | Full-automatic D.C. regulated power supply internal resistance measurement instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711035390.6A CN108303591A (en) | 2017-10-30 | 2017-10-30 | Full-automatic D.C. regulated power supply internal resistance measurement instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108303591A true CN108303591A (en) | 2018-07-20 |
Family
ID=62869650
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711035390.6A Pending CN108303591A (en) | 2017-10-30 | 2017-10-30 | Full-automatic D.C. regulated power supply internal resistance measurement instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108303591A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2192040Y (en) * | 1994-04-26 | 1995-03-15 | 胡维祥 | Precise quick measuring ohmmeter for testing direct impedance of wide measuring range transformer |
| CN201037864Y (en) * | 2007-05-15 | 2008-03-19 | 李庆兰 | Electric current working module for on-line measuring accumulator internal resistance and accumulator internal resistance on-line measuring instrument |
| EP2597477A2 (en) * | 2011-11-24 | 2013-05-29 | SK Innovation Co. Ltd. | Apparatus and method for estimating internal resistance of battery |
| CN104535843A (en) * | 2015-01-14 | 2015-04-22 | 秦辉 | Intelligent direct current stabilized power supply internal resistance measuring device |
| CN104977554A (en) * | 2014-04-10 | 2015-10-14 | 陈书欣 | Detection device for storage battery internal resistance tester |
-
2017
- 2017-10-30 CN CN201711035390.6A patent/CN108303591A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2192040Y (en) * | 1994-04-26 | 1995-03-15 | 胡维祥 | Precise quick measuring ohmmeter for testing direct impedance of wide measuring range transformer |
| CN201037864Y (en) * | 2007-05-15 | 2008-03-19 | 李庆兰 | Electric current working module for on-line measuring accumulator internal resistance and accumulator internal resistance on-line measuring instrument |
| EP2597477A2 (en) * | 2011-11-24 | 2013-05-29 | SK Innovation Co. Ltd. | Apparatus and method for estimating internal resistance of battery |
| CN104977554A (en) * | 2014-04-10 | 2015-10-14 | 陈书欣 | Detection device for storage battery internal resistance tester |
| CN104535843A (en) * | 2015-01-14 | 2015-04-22 | 秦辉 | Intelligent direct current stabilized power supply internal resistance measuring device |
Non-Patent Citations (2)
| Title |
|---|
| 沙占友: "《集成传感器应用》", 30 September 2005 * |
| 王丽: ""多种方法测定电源的电动势和内阻"", 《实验教学与仪器》 * |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180720 |
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| RJ01 | Rejection of invention patent application after publication |