CN103716033A - Method for automatically matching multi-measuring-range switching points - Google Patents
Method for automatically matching multi-measuring-range switching points Download PDFInfo
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- CN103716033A CN103716033A CN201310717739.XA CN201310717739A CN103716033A CN 103716033 A CN103716033 A CN 103716033A CN 201310717739 A CN201310717739 A CN 201310717739A CN 103716033 A CN103716033 A CN 103716033A
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Abstract
The invention relates to a method for automatically matching multi-measuring-range switching points. The method comprises five steps of setting a measuring range initial value, completing initial measuring range switching, controlling measuring range switching, measuring and automatically adjusting measuring range switching points. The method for automatically matching multi-measuring-range switching points solves a problem of easy crash during measuring range switching caused by inaccurate measuring range switching point matching during measurement of multiple measuring ranges in the prior art, can realize automatic matching of optimal switching points without crash, and improves measurement accuracy.
Description
Technical field
The invention belongs to digital processing field, specifically just relate to a kind of for multi-range measurement equipment being carried out to the method for Auto-matching switching point.
Background technology
At present, in many measurement occasions, the scope of measuring-signal is very large, and the measuring range of A/D modulus conversion chip is limited, be generally 0～2000mV, in order to adapt to large measuring range, guarantee certainty of measurement, just need to carry out multrirange switching, as shown in Figure 1, the two grades of ranges of take are example, comprise x1 shelves and x10 shelves, the conversion of MCU micro-control unit controls A/D modulus conversion chip, carries out the switching of range automatically by A/D modulus conversion chip transformation result.Generally, the range ability of A/D modulus conversion chip is 0～2000mV, and desirable switching point is: at x10 shelves range, be switched to x1 shelves range when A/D measured value (or conversion value) >2000mV; At x1 shelves range, when A/D measured value (or conversion value) <200mV, be switched to x10 shelves range, the actual range measuring range of x1 shelves is 200～2000mV, the actual range measuring range of x10 shelves is 0～200mV.
But in actual applications, all there is error in every grade of measurement, can not according to theoretical value, mate completely, probably appearing at x1 shelves measures current potential <200mV and is switched to x10 shelves, at x10 shelves, measure current potential >2000mV and switch back again x1 shelves, cause switch to switch back and forth, produce and crash.General solution be by the switching point of x1 shelves to moving down, such as being arranged on 190mV, but because at x1 shelves error 1mV, be equivalent to x10 shelves range 10mV, in this, solution will cause the deterioration in accuracy of data.
Summary of the invention
The object of the invention is owing to switching, cannot be equipped with by theoretical value in the process of carrying out range switching for existing multi-range measurement equipment, reduced the technological deficiency of certainty of measurement, a kind of method of Auto-matching multrirange switching point is provided, the optimum switching point of Auto-matching range and not crashing, has improved measurement accuracy.
Technical scheme
In order to realize above-mentioned technical purpose, the present invention designs a kind of method of Auto-matching multrirange switching point, it is characterized in that, it comprises following step:
(1) two gears are set and are respectively x1 and x10 shelves, definition x1 shelves range is A, and x10 shelves range is B; The initial value variable of x1 shelves range switching point is V1, and the initial value variable of x10 shelves range switching point is V10, and x10 shelves range switching mark is C;
(2) put range shelves sign A, put range switching mark X, complete initial range and switch;
(3) if there is range switching mark X, MCU micro-control unit will be controlled switching range, after completing, remove range switching mark X; When MCU micro-control unit controls is switched to range x10 shelves, put range shelves sign A, C, when MCU micro-control unit controls is switched to range x1 shelves, put range shelves sign B;
(4) read A/D modulus conversion chip conversion output valve, if measured value is no more than range initial value, represent that signal is normal, measure effectively, this measurement completes, and removes x10 shelves range switching mark C, otherwise needs switching range, proceeds to step 5;
(5) check current range shelves sign, A puts range switching mark X if, proceeds to step 4 and completes range switching; B if, range switching mark B, checks x10 shelves range switching mark C, if had, represents to repeat range and switches, and need to adjust x1 shelves initial value V1, reduces switching point initial value, repeats the 4th step and the 5th step process.
Beneficial effect
The method of a kind of Auto-matching multrirange switching point provided by the invention, while changing multi-range measurement in the past, range switching point cannot correctly mate, while causing range conversion, easily crash, the method of Auto-matching range of the present invention, the optimum switching point of Auto-matching and not crashing, has improved measurement accuracy.
Accompanying drawing explanation
Accompanying drawing 1 is existing two range annexation schematic diagrames.
Accompanying drawing 2 is logical schematic of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the present invention will be further described.
Embodiment
As shown in Figure 2, a kind of method of Auto-matching multrirange switching point, is characterized in that, it comprises following step:
(1) two gears are set and are respectively x1 and x10 shelves, definition x1 shelves range is A, and x10 shelves range is B; The initial value variable of x1 shelves range switching point is V1, and the initial value variable of x10 shelves range switching point is V10; X10 shelves range switching mark is C;
(2) put range shelves sign A, put range switching mark X, complete initial range and switch;
(3) if there is range switching mark X, MCU micro-control unit will be controlled switching range, after completing, remove range switching mark X; When MCU micro-control unit controls is switched to range x10 shelves, put range shelves sign A, C, when MCU micro-control unit controls is switched to range x1 shelves, put range shelves sign B;
(4) read A/D modulus conversion chip conversion output valve, if measured value is no more than range initial value, represent that signal is normal, measure effectively, this measurement completes, and removes x10 shelves range switching mark C, otherwise needs switching range, proceeds to step 5;
(5) check current range shelves sign, A puts range switching mark X if, proceeds to step 4 and completes range switching; B if, range switching mark B, checks x10 shelves range switching mark C, if had, represents to repeat range and switches, and need to adjust x1 shelves initial value V1, reduces switching point initial value, repeats the 4th step and the 5th step process.
The method of a kind of Auto-matching multrirange switching point provided by the invention, while changing multi-range measurement in the past, range switching point cannot correctly mate, while causing range conversion, easily crash, the method of Auto-matching range of the present invention, the optimum switching point of Auto-matching and not crashing, has improved measurement accuracy.
Claims (1)
1. a method for Auto-matching multrirange switching point, is characterized in that, it comprises following step:
(1) two gears are set and are respectively x1 and x10 shelves, definition x1 shelves range is A, and x10 shelves range is B; The initial value variable of x1 shelves range switching point is V1, and the initial value variable of x10 shelves range switching point is V10; X10 shelves range switching mark is C;
(2) put range shelves sign A, put range switching mark X, complete initial range and switch;
(3) if there is range switching mark X, MCU micro-control unit will be controlled switching range, after completing, remove range switching mark X; When MCU micro-control unit controls is switched to range x10 shelves, put range shelves sign A, C, when MCU micro-control unit controls is switched to range x1 shelves, put range shelves sign B;
(4) read A/D modulus conversion chip conversion output valve, if measured value is no more than range initial value, represent that signal is normal, measure effectively, this measurement completes, and removes x10 shelves range switching mark C, otherwise needs switching range, proceeds to step 5;
(5) check current range shelves sign, A puts range switching mark X if, proceeds to step 4 and completes range switching; B if, range switching mark B, checks x10 shelves range switching mark C, if had, represents to repeat range and switches, and need to adjust x1 shelves initial value V1, reduces switching point initial value, repeats the 4th step and the 5th step process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310717739.XA CN103716033B (en) | 2013-12-18 | 2013-12-18 | A kind of method of Auto-matching multrirange switching point |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310717739.XA CN103716033B (en) | 2013-12-18 | 2013-12-18 | A kind of method of Auto-matching multrirange switching point |
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| Publication Number | Publication Date |
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| CN103716033A true CN103716033A (en) | 2014-04-09 |
| CN103716033B CN103716033B (en) | 2017-08-11 |
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| CN201310717739.XA Active CN103716033B (en) | 2013-12-18 | 2013-12-18 | A kind of method of Auto-matching multrirange switching point |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001358572A (en) * | 2000-06-09 | 2001-12-26 | Nec Corp | Signal line control system |
| CN201004072Y (en) * | 2007-02-12 | 2008-01-09 | 上海四达电子仪表有限公司 | An automatic gear conversion and range measurement circuit |
| CN101154942A (en) * | 2006-09-29 | 2008-04-02 | 富士通株式会社 | Buffer circuit and control method thereof |
-
2013
- 2013-12-18 CN CN201310717739.XA patent/CN103716033B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001358572A (en) * | 2000-06-09 | 2001-12-26 | Nec Corp | Signal line control system |
| CN101154942A (en) * | 2006-09-29 | 2008-04-02 | 富士通株式会社 | Buffer circuit and control method thereof |
| CN201004072Y (en) * | 2007-02-12 | 2008-01-09 | 上海四达电子仪表有限公司 | An automatic gear conversion and range measurement circuit |
Non-Patent Citations (1)
| Title |
|---|
| 黄利君: "自动量程转换电路设计", 《西安石油学院学报（自然科学版）》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| CN103716033B (en) | 2017-08-11 |
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