CN103412202B - A kind of method of electric current by stages calibration - Google Patents

Abstract

The method that the invention discloses the calibration of a kind of electric current by stages, comprises the following steps: the diverter changed is identified by (1)；(2) current range of diverter is carried out minizone division；(3) each interval current sample gain is calculated；(4) according to the result of calculation of step (3), electric current is compensated calculating and obtain actual current value.The present invention, by automatically identifying and calibration automatically diverter, exempts manual calibration electricity and decreases substantial amounts of manpower demand in production, reduce cost, improve work efficiency, it also avoid error and mistake that manual calibration is brought simultaneously；Diverter range is carried out by stages gain calibration, and according to gain calibration, electric current is compensated, be substantially reduced error, improve certainty of measurement.

Description

A kind of method of electric current by stages calibration

Technical field

The method that the invention of this reality relates to the calibration of a kind of electric current by stages.

Background technology

The current sample major part of current battery management system is all to use diverter scheme to realize, and owing to diverter exists a lot of model, when changing different diverters, battery management system is accomplished by re-starting manual calibration, is unfavorable for its industrialization.The diverter of same model itself there is also error, is also required to carry out manual calibration when changing the diverter of same model, and the calibration efficiency of battery management system electric current is low, is unfavorable for that it is promoted the use of.The method of calibration applies two different electric currents generally by diverter, calculates current measurement gain between actual AD sampled value and the current value of applying drawn by measurement.And the method that this metering system the most only applies two different electric currents to diverter, the yield value only one of which obtained, in the occasion that current measuring range is relatively wide, the measurement to electric current may be confined to keep degree of precision within a certain range, it is impossible to ensures the precision in gamut.Meanwhile, changing diverter every time, need manual calibration, inefficiency, intelligence degree is low, and probability of artificially makeing mistakes is high.

Summary of the invention

The deficiency being in solve above-mentioned diverter to calibrate, the present invention provides the design in school, a kind of electric current by stages.

The method of a kind of electric current by stages calibration, comprises the following steps:

(1) diverter is identified；(2) current range of diverter is carried out minizone division；(3) each interval current sample gain is calculated；(4) according to the result of calculation of step (3), electric current is compensated calculating and obtain actual current value.

Concrete, the method that step (1) is described to be identified diverter is: provides a normalized current preset for diverter, and measures its magnitude of voltage, and inquires about its model according to this magnitude of voltage in diverter model voltage synopsis.

More specifically, the method that step (2) is described carries out minizone division by the current range of diverter is: is slit into two or more interval according to the range average mark of diverter, and interval division information is stored.

More specifically, the method calculating each interval current sample gain is: (31) for interval N (N=1,2,3 ... apply I in) respectively_NHigh、I_NLowTwo actual currents, carry out current sample the most respectively and calculate current value；(32) two current values that sampling obtains are obtained corresponding AD through Binary Conversion_NHigh、AD_NLowTwo AD sampled values；(33) current sample gain computing formula is set up:The current sample Gain generating gain synopsis in each interval calculated is preserved.

Further, it is thus achieved that the method for actual current value is: (41) are to actual electric current I_x(wherein x=1,2,3 ...) carry out sampling and calculate its AD sampled value AD_x, calculate the interval x at its place；(42) inquiry gain synopsis, it is thus achieved that interval current sample yield value GAIN corresponding to x_x(43) have according to current sample gain computing formula: actual current

Further, the method for building up of described diverter model voltage synopsis is: use above-mentioned default normalized current to test the diverter of different model respectively, and record relevant voltage value respectively, diverter is included, and the relevant information write diverter model voltage synopsis of model, range and normalized current test voltage value stores.

In sum, the method have the advantages that (1) is by automatically identifying and calibration automatically diverter, exempt manual calibration electricity and decrease substantial amounts of manpower demand in production, reduce cost, improve work efficiency, it also avoid error and mistake that manual calibration is brought simultaneously；(2) diverter range is carried out by stages gain calibration, and according to gain calibration, electric current is compensated, be substantially reduced error, improve certainty of measurement.

Detailed description of the invention

In order to allow those skilled in the art can be best understood from technical scheme, below the invention will be further elaborated.

The method that present invention is disclosed the calibration of a kind of electric current by stages, it is characterised in that comprise the following steps:

Firstly generate diverter model voltage synopsis, use default normalized current that the diverter of different model is tested respectively, and record relevant voltage value respectively, diverter is included, and the relevant information write diverter model voltage synopsis of model, range and normalized current test voltage value stores.The diverter changed is identified, provides a normalized current preset for diverter, and measure its magnitude of voltage, and in diverter model magnitude of voltage synopsis, inquire about its model according to this magnitude of voltage.

Range average mark according to diverter is slit into two or more interval, and interval division information is stored.As a example by the range diverter as 300A, it is divided into an interval, i.e. 0～30A, 30～60A, 60～90A, 90～120A, 120～150A, 150～180A, 180～210A, 210～240A, 240～270A, 270～300A with 30A.

(3) for interval N (N=1,2,3 ... apply I in) respectively_NHigh、I_NLowTwo actual current (I_NHigh、I_NLowAny two current value in interval N), carry out the current value that current sample calculates the most respectively；Two current values sampling obtained obtain corresponding AD through Binary Conversion_NHigh、AD_NLowTwo AD sampled values；Set up current sample gain computing formula:GAIN_NFor the current sample gain that n-th is interval；Current sample gain to each interval all calculates, and is preserved by the current gain generation gain synopsis in each interval obtained.

Use current sample gain that electric current compensates calculating and obtain actual current value.To actual electric current I_x(wherein x=1,2,3 ...) carry out sampling and calculate its AD sampled value AD_x, calculate the interval x at its place；Inquiry gain synopsis, it is thus achieved that interval current sample yield value GAIN corresponding to x_x；Have according to then flowing sampling gain computing formula:

${\mathrm{GAIN}}_x=\frac{{\mathrm{AD}}_x-{\mathrm{AD}}_{xLow}}{I_x-I_{xLow}},$

I.e. actual current:

The present embodiment is the more excellent embodiment of the present invention, and the part not being described in detail all uses known mature technology.It should be noted that; in the case of without departing substantially from present invention spirit and essence thereof; those of ordinary skill in the art are when making various corresponding change and deformation according to the present invention, but these change and deform the protection domain that all should belong to appended claims of the invention.

Claims (5)

1. the method for an electric current by stages calibration, it is characterised in that comprise the following steps:

(1) diverter is identified；

(2) current range of diverter is carried out minizone division；

(3) each interval current sample gain is calculated；

(4) according to the result of calculation of step (3), electric current is compensated calculating and obtain actual current value；

Wherein step (3) calculates the method for each interval current sample gain and is: for interval N, N=1,2, and 3 ... execute the most respectively Add I_NHigh、I_NLowTwo actual currents, I_NHigh、I_NLowFor any two current value in interval N, then distinguish Carry out current sample and calculate current value；Two current values sampling obtained obtain corresponding AD through Binary Conversion_NHigh、 AD_NLowTwo AD sampled values；Set up current sample gain computing formula: GAIN_NFor the current sample gain that n-th is interval；Current sample gain to each interval all calculates, and will obtain The current sample Gain generating gain synopsis in each interval preserve.

The method of a kind of electric current by stages the most according to claim 1 calibration, it is characterised in that step (1) is described to shunting The method that device is identified is: provides a normalized current preset for diverter, and measures its magnitude of voltage, and according to this magnitude of voltage Its model is inquired about in diverter model voltage synopsis.

The method of a kind of electric current by stages the most according to claim 2 calibration, it is characterised in that step (2) is described will shunting The current range of device carries out the method for minizone division: be slit into plural interval according to the range average mark of diverter, and Interval division information is stored.

The method of a kind of electric current by stages the most according to claim 3 calibration, it is characterised in that the method obtaining actual current value For:

(41) to actual electric current I_x, wherein x=1,2,3 ... carry out sampling and calculate its AD sampled value AD_x, calculate it The interval x at place；

(42) inquiry gain synopsis, it is thus achieved that interval current sample yield value GAIN corresponding to x_x

(43) have according to current sample gain computing formula:

Actual current

The method of a kind of electric current by stages the most according to claim 2 calibration, it is characterised in that described diverter model voltage pair Method for building up according to table is: uses described default normalized current to test the diverter of different model respectively, and remembers respectively Picture recording answers magnitude of voltage, and diverter includes the relevant information write diverter model of model, range and normalized current test voltage value Voltage synopsis stores.