CN103792430A - Self-adaptive range resistance test method - Google Patents
Self-adaptive range resistance test method Download PDFInfo
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- CN103792430A CN103792430A CN201210419051.9A CN201210419051A CN103792430A CN 103792430 A CN103792430 A CN 103792430A CN 201210419051 A CN201210419051 A CN 201210419051A CN 103792430 A CN103792430 A CN 103792430A
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Abstract
The invention discloses a self-adaptive range resistance test method comprising the following steps: S1. current Ia is piped onto a resistor so that voltage difference is formed on the two ends of the resistor, and a test range is arranged to be Vlim1; S2. voltage difference Va1 of the two ends of the resistor is measured under the current Ia; S3. current Ib is piped onto the resistor so that voltage difference is formed on the two ends of the resistor, and a new test range Vlim2 is arranged with Va1 as a base number, wherein Va1, Ib, Va1 and Ia meet that Vlim2/Ib >/= Va1/Ia; S4. voltage difference Va2 of the two ends of the resistor is measured under the current Ib; and S5. a resistance value of the two ends of the resistor is calculated and outputted according to Ib and Va2. Under the situation that voltage is ensured not to surpass the range, resolution in voltage measurement is enhanced, resistance measurement precision is enhanced, an error in a resistance test is reduced and technology demands are met.
Description
Technical field
The present invention relates to resistance test technical field, particularly relate to a kind of self-adaptation range method for testing resistance.
Background technology
Existing for trap resistance, hole resistance, the two ends method for testing resistance such as square resistance are: add electric current at arbitrary end (high-end), the other end (low side) ground connection, and the range of each end is set.Wait for after 0.1 second, measure high-end magnitude of voltage, resistance=voltage/current/coefficient, wherein coefficient can arrange according to actual conditions, general and number, breadth length ratio is relevant.
The measuring resolution of Ag4070 board is relevant with the range value of setting, due to technological fluctuation, and resistance type difference, resistance is difficult to hold, therefore the voltage range difference measuring, it is relevant that test output valve resolution and range arrange, and range arranges improper meeting and causes bigger error.Existing method of testing can meet device requirement, but lack of resolution, and error is large, causes testing homogeneity bad.
Therefore,, for above-mentioned technical matters, be necessary to provide a kind of self-adaptation range method for testing resistance.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of self-adaptation range method for testing resistance, it is test resistance resistance more accurately.
To achieve these goals, the technical scheme that the embodiment of the present invention provides is as follows:
A kind of self-adaptation range method for testing resistance, said method comprising the steps of:
S1, on resistance, pass into electric current I
a, make resistance two ends form voltage difference, it is V that testing range is set
lim1;
S2, in electric current I
athe voltage difference V at lower measuring resistance two ends
a1;
S3, on resistance, pass into electric current I
b, make resistance two ends form voltage difference, with V
a1for radix arranges new testing range V
lim2, wherein V
a1, I
b, V
a1and I
ameet V
lim2/ I
b>=V
a1/ I
a;
S4, in electric current I
bthe voltage difference V at lower measuring resistance two ends
a2;
S5, according to I
band V
a2the resistance at measuring and calculating output resistance two ends.
As a further improvement on the present invention, described V
a1, I
b, V
a1and I
ameet (V
lim2/ I
b)/(V
a1/ I
a)=k, k is constant and 1≤k≤1.2, new testing range V in step S3
lim2for k*V
a1* (I
b/ I
a).
As a further improvement on the present invention, described (V
lim2/ I
b)/(V
a1/ I
ain)=k, k is made as constant 1.1, new testing range V in step S3
lim2for 1.1V
a1* (I
b/ I
a).
As a further improvement on the present invention, described electric current I
b=I
a, new testing range V in step S3
lim2for k*V
a1.
As a further improvement on the present invention, described electric current I
b=I
a/ k, new testing range V in step S3
lim2for V
a1.
As a further improvement on the present invention, described resistance one end passes into electric current, other end connecting to neutral current potential.
As a further improvement on the present invention, in described step S5, the resistance at resistance two ends is V
a2/ I
b.
As a further improvement on the present invention, described testing range is V
lim1time, the Measurement Resolution of resistance is 0.0001V
lim1; Testing range is V
lim2time, the Measurement Resolution of resistance is 0.0001V
lim2.
The invention has the beneficial effects as follows: the present invention tests resistance by wide range, estimate according to the magnitude of voltage at resistance two ends and electric current the resistance that testing resistance, then reset according to estimating the resistance that testing resistance the size of current and the voltage measurement range that pass into, guaranteeing that voltage is not no to scale in the situation that, improve the resolution of voltage measurement, and then put forward high-resistance measuring accuracy, and reduce resistance test error, meet technique needs.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, the accompanying drawing the following describes is only some embodiment that record in the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the particular flow sheet of self-adaptation range method for testing resistance of the present invention;
Fig. 2 is I in an embodiment of the present invention manual authentication data
a-V
abroken line graph;
Fig. 3 is R-V in an embodiment of the present invention manual authentication data
abroken line graph.
Embodiment
In order to make those skilled in the art person understand better the technical scheme in the present invention, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Based on the embodiment in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, should belong to the scope of protection of the invention.
Shown in ginseng Fig. 1, a kind of self-adaptation range method for testing resistance of the present invention, it comprises the following steps:
S1, on resistance, pass into electric current I
a, make resistance two ends form voltage difference, it is V that testing range is set
lim1.Wherein resistance one end (high-end) passes into electric current, the other end (low side) connecting to neutral current potential;
S2, in electric current I
athe voltage difference V at lower measuring resistance two ends
a1.V
a1it is the high-end magnitude of voltage measuring of resistance;
S3, on resistance, pass into electric current I
b, make resistance two ends form voltage difference, resistance one end (high-end) passes into electric current, and the other end (low side) connecting to neutral current potential, with V
a1for radix arranges new testing range V
lim2, wherein V
a1, I
b, V
a1and I
ameet V
lim2/ I
b>=V
a1/ I
a.Definition (V
lim2/ I
b)/(V
a1/ I
a)=k, wherein k is constant, new testing range V
lim2for k*V
a1* (I
b/ I
a).Preferably, in the present invention the span of k is set to 1≤k≤1.2;
S4, in electric current I
bthe voltage difference V at lower measuring resistance two ends
a2.V
a2it is the high-end magnitude of voltage measuring of resistance;
S5, according to I
band V
a2calculate the also resistance at output resistance two ends.The resistance at resistance two ends is V
a2/ I
b.
First the present invention can estimate by step S1 and S2 the resistance that testing resistance, and then step S3 and S4 arrange new range according to the resistance of testing resistance again and measure.Testing range is V
lim1time, the Measurement Resolution of resistance is 0.0001V
lim1, testing range is V
lim2time, the Measurement Resolution of resistance is 0.0001V
lim2.New range is measured V
lim2be less than testing range V
lim1value, therefore the Measurement Resolution of resistance is also less, so can increase the measuring accuracy of resistance.
In step S1 and S2, the resistance that estimation obtains testing resistance is V
a1/ I
a, new range V is set
lim2after, the maximum resistance resistance that can measure is in theory V
lim2/ I
b, according to V
a1/ I
a=V
lim2/ I
bnew range V is set
lim2.The resistance of considering estimation has certain error with real resistance, need to be by new range V
lim2that sets is slightly bigger.Be more than or equal to 1 scale-up factor k therefore set one, definition (V
lim2/ I
b)/(V
a1/ I
a)=k, k>=1, new testing range V
lim2for k*V
a1* (I
b/ I
a).Preferably, in embodiment of the present invention, the span of k is set to 1≤k≤1.2, more further, in embodiment of the present invention, the value of k is made as 1.1.
New testing range V
lim2for k*V
a1* (I
b/ I
a), one embodiment of the present invention can be:
S1 ', on resistance, pass into electric current I
a, make resistance two ends form voltage difference, it is V that testing range is set
lim1;
S2 ', in electric current I
aunder measure the voltage difference V at resistance two ends
a1;
S3 ', on resistance, pass into electric current I
b, wherein electric current I
b=I
a, make resistance two ends form voltage difference, with V
a1for radix arranges new testing range V
lim2, V
lim2=k*V
a1, preferably, V
lim2=1.1V
a1;
S4 ', in electric current I
aunder measure the voltage difference V at resistance two ends
a2;
S5 ', according to I
aand V
a2calculate the also resistance at output resistance two ends.
In above-mentioned embodiment, adopt steady current, also can adopt the mode that changes electric current, be specially:
S1 ", on resistance, pass into electric current I
a, make resistance two ends form voltage difference, it is V that testing range is set
lim1;
S2 ", in electric current I
aunder measure the voltage difference V at resistance two ends
a1;
S3 ", on resistance, pass into electric current I
b, make resistance two ends form voltage difference, with V
a1for radix arranges new testing range V
lim2, set electric current I
b=I
a/ k, new testing range V
lim2=V
a1, preferably, electric current I
b=I
a/ 1.1;
S4 ", in electric current I
bunder measure the voltage difference V at resistance two ends
a2;
S5 ", according to I
band V
a2calculate the also resistance at output resistance two ends.
Except above-mentioned two kinds of embodiments, different electric current I can also be set
bwith new testing range V
lim2, only need to meet (V
lim2/ I
b)/(V
a1/ I
a)=k>=1, in order to guarantee the accuracy of measuring resistance, the span of k is set to 1≤k≤1.2.
Following with k=1.1, I
b=I
afor example, self-adaptation range method for testing resistance of the present invention is further described.
First carry out manual confirmation, confirm the actual value of testing resistance, for contrasting test result of the present invention.At the high-end electric current increasing gradually that passes into of resistance, low side connecting to neutral current potential, measures the magnitude of voltage under each electric current, obtains V
aand I
arear calculated resistance resistance R.Shown in concrete data ginseng table 1.
Table 1: manual authentication data
| V a(V) | I a(A) | R(ohm) |
| 0.00416 | 0.00001 | 416.00 |
| 0.00833 | 0.00002 | 416.50 |
| 0.01252 | 0.00003 | 417.33 |
| 0.01669 | 0.00004 | 417.25 |
| 0.0209 | 0.00005 | 418.00 |
| 0.02517 | 0.00006 | 419.50 |
| 0.02936 | 0.00007 | 419.43 |
| 0.03355 | 0.00008 | 419.37 |
| 0.0377 | 0.00009 | 418.89 |
| 0.0419 | 0.00010 | 419.00 |
Shown in ginseng Fig. 2 and Fig. 3, be respectively I in table
a-V
aand R-V
abroken line graph, as shown in Figure 2, along with the increase of electric current, the voltage at resistance two ends is linear increase also.By finding out in Fig. 3, at electric current hour, the resistance fluctuation recording is larger, and in the time that electric current increases gradually, the resistance recording is tending towards a stationary value, as in the present embodiment, by the true resistive value R=420ohm of known resistance in table.
When to adopt range be 50V when sheet number is respectively in 11,12,20,22 on resistance, each 5 test positions are tested automatically, obtain the test data in table 2.
Table 2: the automatic test data that range is 50V
In the time that selected range is 50V, minimum resistance respectively rate is 0.005 (voltage resolution)/0.0001 (electric current)=50ohm,, there is 4.76% error with the true resistive value 420ohm of resistance in the actual sheet position 3 resistance R=400ohm that records No. 20.
When to adopt range be 10V when sheet number is respectively in 11,12,20,22 on resistance, each 5 test positions are tested automatically, obtain the test data in table 3.
Table 3: the automatic test data that range is 10V
In the time that selected range is 10V, minimum resistance respectively rate is 0.001 (voltage resolution)/0.0001 (electric current)=10ohm,, there is 2.38% error with the true resistive value 420ohm of resistance in the actual sheet position 3 resistance R=410ohm that records No. 20.
In the present invention's one preferred implementation, new range 1.1V is set
a1, as in the time that range is 50V, record the voltage V at 3 resistance R two ends, No. 20 built-in testing positions
a1for 0.04V, it is 1.1V that new range is set
a1be 0.44V, and then when sheet number is respectively in 11,12,20,22 on resistance, each 5 test positions are tested automatically, obtain the test data in table 4.
Table 4: range is 1.1V
a1automatic test data
When selected range is 1.1V
a1time, minimum resistance respectively rate is 1.1V
a1* 0.0001 (voltage resolution)/0.0001 (electric current)=1.1V
a1ohm,, there is 0.24% error with the true resistive value 420ohm of resistance in the actual sheet position 3 resistance R=421ohm that records No. 20.
Certainly in other embodiments, also range can be made as to V
a1, measuring current is set to 0.0001/1.1A for the second time, also can improve equally the resolution of voltage measurement, puies forward high-resistance measuring accuracy.
Can be found out by technique scheme, the present invention tests resistance by wide range, estimate according to the magnitude of voltage at resistance two ends and electric current the resistance that testing resistance, then reset according to estimating the resistance that testing resistance the size of current and the voltage measurement range that pass into, guaranteeing that voltage not no to scale in the situation that, has improved the resolution of voltage measurement, and then put forward high-resistance measuring accuracy, reduce resistance test error, met technique needs.
To those skilled in the art, obviously the invention is not restricted to the details of above-mentioned one exemplary embodiment, and in the situation that not deviating from spirit of the present invention or essential characteristic, can realize the present invention with other concrete form.Therefore, no matter from which point, all should regard embodiment as exemplary, and be nonrestrictive, scope of the present invention is limited by claims rather than above-mentioned explanation, is therefore intended to all changes that drop in the implication and the scope that are equal to important document of claim to include in the present invention.Any Reference numeral in claim should be considered as limiting related claim.
In addition, be to be understood that, although this instructions is described according to embodiment, but be not that each embodiment only comprises an independently technical scheme, this narrating mode of instructions is only for clarity sake, those skilled in the art should make instructions as a whole, and the technical scheme in each embodiment also can, through appropriately combined, form other embodiments that it will be appreciated by those skilled in the art that.
Claims (8)
1. a self-adaptation range method for testing resistance, is characterized in that, said method comprising the steps of:
S1, on resistance, pass into electric current I
a, make resistance two ends form voltage difference, it is V that testing range is set
lim1;
S2, in electric current I
athe voltage difference V at lower measuring resistance two ends
a1;
S3, on resistance, pass into electric current I
b, make resistance two ends form voltage difference, with V
a1for radix arranges new testing range V
lim2, wherein V
a1, I
b, V
a1and I
ameet V
lim2/ I
b>=V
a1/ I
a;
S4, in electric current I
bthe voltage difference V at lower measuring resistance two ends
a2;
S5, according to I
band V
a2the resistance at measuring and calculating output resistance two ends.
2. self-adaptation range method for testing resistance according to claim 1, is characterized in that described V
a1, I
b, V
a1and I
ameet (V
lim2/ I
b)/(V
a1/ I
a)=k, k is constant and 1≤k≤1.2, new testing range V in step S3
lim2for k*V
a1* (I
b/ I
a).
3. self-adaptation range method for testing resistance according to claim 2, is characterized in that described (V
lim2/ I
b)/(V
a1/ I
ain)=k, k is made as constant 1.1, new testing range V in step S3
lim2for 1.1V
a1* (I
b/ I
a).
4. self-adaptation range method for testing resistance according to claim 2, is characterized in that described electric current I
b=I
a, new testing range V in step S3
lim2for k*V
a1.
5. self-adaptation range method for testing resistance according to claim 2, is characterized in that described electric current I
b=I
a/ k, new testing range V in step S3
lim2for V
a1.
6. self-adaptation range method for testing resistance according to claim 1, is characterized in that, described resistance one end passes into electric current, other end connecting to neutral current potential.
7. self-adaptation range method for testing resistance according to claim 1, is characterized in that, in described step S5, the resistance at resistance two ends is V
a2/ I
b.
8. self-adaptation range method for testing resistance according to claim 1, is characterized in that, described testing range is V
lim1time, the Measurement Resolution of resistance is 0.0001V
lim1; Testing range is V
lim2time, the Measurement Resolution of resistance is 0.0001V
lim2.
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|---|---|---|---|
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| CN201210419051.9A CN103792430B (en) | 2012-10-26 | 2012-10-26 | Self-adaptive range resistance test method |
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| CN103792430B CN103792430B (en) | 2017-02-22 |
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Cited By (3)
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|---|---|---|---|---|
| CN105866544A (en) * | 2015-01-23 | 2016-08-17 | 北京电子工程总体研究所 | Detection method of passive resistance of electronic device |
| CN111090006A (en) * | 2018-10-23 | 2020-05-01 | 深圳市茁壮网络股份有限公司 | Small resistance measuring device based on weak signal |
| US11397203B2 (en) | 2019-09-24 | 2022-07-26 | Delta Electronics, Inc. | Estimating method for braking resistor |
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| CN111090006A (en) * | 2018-10-23 | 2020-05-01 | 深圳市茁壮网络股份有限公司 | Small resistance measuring device based on weak signal |
| US11397203B2 (en) | 2019-09-24 | 2022-07-26 | Delta Electronics, Inc. | Estimating method for braking resistor |
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|---|---|
| CN103792430B (en) | 2017-02-22 |
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