CN104360300B - A kind of voltage accuracy of voltage calibration equipment corrects adjusting process automatically - Google Patents
A kind of voltage accuracy of voltage calibration equipment corrects adjusting process automatically Download PDFInfo
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Abstract
Adjusting process is corrected automatically the invention discloses a kind of voltage accuracy of voltage calibration equipment, loop test is first passed through to measure the benchmark output valve of each passage and note down, after recording 5 times, each channel output values of all records contrast the difference obtained between them by standard output value during this 5 times are recorded, if having channel difference values outside the first allowed band value, output compensation then is carried out to the passage, until the difference is in the first allowed band value；If having channel difference values outside the second allowed band value, then benchmark compensation is carried out to the passage to detect, and the voltage reference value to the passage carries out contrast with desired standard value and obtains its difference, if the difference is outside benchmark allowed band value, benchmark compensation then is carried out to it, until the difference is in benchmark allowed band value, continue executing with loop test, compared with prior art, the present invention passes through loop test, automatic software compensating approach is carried out for there is the passage of error, removing artificial adjustment from, improving checking precision and efficiency.
Description
Technical field
The present invention relates to electronic technology field, specifically refer to a kind of voltage accuracy of voltage calibration equipment and correct adjustment automatically
Method.
Background technology
With the development of new energy, the equipment using battery as power supply also occurs more and more, and using battery as
The equipment of power supply needs to use managing electric quantity product.During managing electric quantity product is manufactured, managing electric quantity product needs
High-precision voltage check adjustment, now, the voltage reference value that existing voltage reference output is exported is often by electricity
Measure the influence of management product metapyretic temperature drift so that calibration equipment follow-on test managing electric quantity product for a period of time after, it sets
The current base output valve of standby respective channel produces saltus step or skew, so that the voltage accuracy of the calibration equipment is by shadow
Ring, cause product yield relatively low.But, can only be by adjustment circuit if necessary to obtain voltage compensation in existing equipment
Variable resistor resistance carries out manual setting, needs to be related to the hardware adjustment of complexity during adjustment, efficiency is very low, is unfavorable for enterprise
The raising of industry benefit.
The content of the invention
In view of this, the present invention needs to be to provide a kind of be applied to the output of multichannel voltage benchmark the problem of solution
The automatic amendment adjusting process of the calibration equipment voltage accuracy at end.
In order to solve the above problems, the present invention provides following technological means：A kind of voltage accuracy of voltage calibration equipment is certainly
Dynamic amendment adjusting process, based on the calibration equipment with multichannel voltage reference output, it is characterised in that：Including following automatic
Correct alignment step：
A. the current base output valve of each channel voltage reference output output of host computer loop test, records this current
Value, is recorded once after completing a wheel loop test；
B. after upper computer detection to loop test has recorded preset loop number of times, will own in the preset loop number of times
The output valve of each channel voltage reference output of record is averaged respectively, then is compared with standard output value, obtains each passage
The difference of output valve and standard output value；
If c. all channel difference values are in the range of the first permissible value, the repeat step since a, if there is channel difference values to be more than
Default first permissible value scope, then carry out output compensation to the passage current base output valve, is performed after each channel compensation is complete
Step d；
If size of the difference is outside the second permissible value scope, starts benchmark compensation detection, read the channel voltage benchmark
Value, and the voltage reference value is compared with given voltage reference value, its difference is obtained, if the size of the difference is in benchmark allowed band
In value, then current channel exits compensation；If the size of the difference is outside benchmark allowed band value, the channel voltage a reference value is entered
Row benchmark is compensated, and step e is performed after each channel compensation is complete；Wherein, the absolute value of the second permissible value is more than the exhausted of the first permissible value
To value;
D. all passages detect the difference of the current output valve and standard output value drawn in the first permissible value model again
In enclosing, then output compensation, the repeat step since a are completed；Otherwise it is logical not in the range of the first permissible value to all differences
Road carries out output compensation, and repeat step d again；If compensating number of times to be more than after default maximum compensation number of times, step is performed
f；
E. all passages again read off measured current voltage a reference value with the difference of desired standard value in benchmark permission
In value range size, then benchmark compensation, the repeat step since a are completed；Otherwise it is big not in benchmark allowed band value to the difference
Passage in small carries out benchmark compensation, and repeat step e again；If compensating number of times to be more than after default maximum compensation number of times,
Perform step f；
F. a certain passage is after Continuous Compensation number of times is more than default maximum compensation number of times, and host computer is by the path marking
After send maintenance warning, and the repeat step since a.
It is preferred that, the preset loop number of times of the loop test is 5 times.
It is preferred that, the output compensation to current base output valve biasing output offset by realizing to current output valve
Compensation, benchmark compensation passes through the benefit realized to voltage reference value biased reference offset for current voltage a reference value
Repay.
It is preferred that, the output offset and benchmark offset are respectively 16 data being stored in two bytes, bag
Include for judging that the output offset and voltage reference value need to add up or reduce the conversion position of difference and for saved differences
Difference position, the output offset uses 1 byte saved differences position using 1 byte storage conversion position；The benchmark is mended
Value is repaid using 0.5 byte storage conversion position, and uses 1.5 byte saved differences positions.
It is preferred that, the conversion position of the output offset or benchmark offset is stored in a high position for upper byte, the difference
Value position is stored in the low level of low byte.
It is preferred that, when position of converting is 0, the cumulative difference position of benchmark output valve or voltage reference value of current channel is stored
Difference；When position of converting is 1, the benchmark output valve or voltage reference value of current channel subtract the difference that difference position is stored.
It is preferred that, the first permissible value scope is ± 2MV, and the second permissible value scope is ± 10MV, the benchmark
Allowed band value is ± 0.25MV.
Compared with prior art, the present invention is weighted the current base output valve of each passage flat by multiple cycle detection
Difference is calculated afterwards, then the difference is biased to current base output valve, is obtained accurate current base output valve, is realized and work as
The soft compensation of preceding benchmark output valve, the process is automatic perform detection and adjustment, eliminates artificial input, and the compensation be divided into it is defeated
Go out compensation and benchmark compensation, output compensation can be finely adjusted compensation to benchmark output valve, and benchmark compensation is to voltage reference
Value carries out coarse adjustment compensation, effectively can carry out more accurate compensation to the passage of different differences, improve checking precision and efficiency.
Brief description of the drawings
Fig. 1 is embodiment of the present invention output compensation schematic process flow diagram；
Fig. 2 is that embodiment of the present invention benchmark compensates schematic process flow diagram.
Embodiment
Present invention is described in further detail below in conjunction with drawings and Examples.
As shown in figure 1, Fig. 1 is the schematic process flow diagram that the embodiment of the present invention integrally realizes strick precaution, in order to realize automatic tune
The function in school, the technological means comprises the following steps：
The first step, initializes host computer first, stores the voltage reference value of standard, completes host computer circulation after initialization
The voltage reference value of each channel voltage reference output output is tested, the value of each channel voltage benchmark output is recorded, completes one and take turns
The number of times storage of record is arrived voltage output number of times accumulator by loop test postscript to record once；
After upper computer detection to loop test has recorded preset loop number of times, by each of preset loop number of times record
The value difference weighted average of channel voltage benchmark output obtains the voltage reference output average value of each passage；The present embodiment is default to follow
Ring number of times is designated as 5 times, when upper computer detection to loop test after 5 times, the Self-regulation track voltage accuracy mould of activation system
Formula.
Second step, the Self-regulation track voltage accuracy pattern first retrieves rear five records of test, according to formula C=| (X1+X2+
X3+X4+X5)/5-S | the difference of the average value after 5 weighted averages and standard output value is obtained, if the difference is in ± 2MV scopes
Within, then it is defined as compensating, if the difference is beyond ± 2MV scope, is defined as needs and compensates, so
After start compensation mechanism.
3rd step, the compensation mechanism includes output compensation and benchmark compensates two kinds of compensation ways, there is difference to this and leads to
Road is compensated, if the difference confirms as less difference outside ± 2MV scope but within the scope of ± 10MV, then right
The voltage reference output of the passage carries out output compensation, and output compensation is to current base output valve biasing output offset
Realize that fine tuning is handled, the output offset is 16 binary values, during output compensation is carried out, and first turns the difference
The value of 16 systems is melted into, then the value for changing into 16 systems is stored into the difference position of 1 byte-sized, 1 byte is big
Small difference position can store the difference data of 0-255 value ranges, be placed on the low level of output offset, then by the phase of the difference
Situation, i.e., positive negative situation storage is into conversion position, and when difference is timing, the value of conversion position is 0, in test current base output
Add up the difference for needing to compensate during value, when difference is bears, and the value of conversion position is 1, is subtracted when testing current base output valve
The difference of compensation is needed, and the value is stored into the conversion that size is 1 byte, a high position for output offset is placed on,
Convert position and difference position size totally 2 bytes.
If after each passage progress output compensation is finished, the benchmark output valve current to equipment is detected again, if respectively
After passage progress output compensation is finished, output compensation is carried out to equipment again and is detected, if the current base output of all passages
Value exits output compensation detection with the difference of default standard output value in the range of ± 2MV, then, proceeds loop test；
If having the difference of passage outside ± 2MV scopes, output compensation is carried out again to off-limits passage, until all logical
Road is all within the difference allowed band.If the passage Continuous Compensation number of times is more than after default maximum compensation number of times, upper
Machine will send maintenance warning after the path marking, and exit output compensation detection, proceed loop test.
4th step, if as shown in Fig. 2 the difference is beyond ± 10MV scope, confirming as larger difference, then to equipment
Benchmark compensation detection is carried out, and the voltage reference value of each passage is read out using serial manner, then ought by what is detected
Preceding a reference value is compared with desired standard value, if the difference of the passage current voltage a reference value and desired standard value ±
In 0.25MV, then the benchmark compensation to the passage is exited, continue the benchmark compensation detection of next passage.If the passage current voltage
The difference of a reference value and desired standard value then carries out benchmark outside ± 0.25MV scopes to the voltage reference output of the passage
Compensation, by obtaining compensating approach to current voltage a reference value biased reference offset.
Benchmark offset is as output offset, including positioned at high-order conversion position and positioned at the difference position of low level, but
It is that conversion position size is only 0.5 byte, difference position size is 1.5 bytes, and the scope of the storable value in such difference position is 0-
4095, the scope of storable size of the difference is substantially increased compared with exporting compensation, its compensation precision is higher, it is adaptable to current
There is case of big difference of values with desired standard value in voltage reference value.
If after each passage progress benchmark compensation is finished, carrying out benchmark compensation to equipment again and detecting, if all passages
Current voltage a reference value exits benchmark compensation detection with the difference of desired standard value in the range of ± 0.25MV, then, proceeds
Loop test；If having the difference of passage outside ± 0.25MV scopes, benchmark benefit is carried out again to off-limits passage
Repay, until all passages are all within the difference allowed band, if the passage Continuous Compensation number of times is more than default maximum compensation
After number of times, host computer will send maintenance warning after the path marking, and exit benchmark compensation detection, proceeds circulation and surveys
Examination.
Above-described embodiment is only the preferably implementation of the present invention, and it describes more specific and in detail, but can not be because
This and be interpreted as the limitation to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art,
On the premise of not departing from present inventive concept, various modifications and improvements can be made, these obvious alternative forms belong to
In protection scope of the present invention.
Claims (7)
1. a kind of voltage accuracy of voltage calibration equipment corrects adjusting process automatically, based on multichannel voltage reference output
Calibration equipment, it is characterised in that：Including following automatic amendment alignment step：
A. the current base output valve of each channel voltage reference output output of host computer loop test, records the currency, complete
Recorded once after into a wheel loop test；
B. after upper computer detection to loop test has recorded preset loop number of times, by all records in the preset loop number of times
The output valve of each channel voltage reference output average respectively, then compared with standard output value, obtain each passage output
The difference of value and standard output value；
If c. all channel difference values are in the range of the first permissible value, the repeat step since a, if there have channel difference values to be more than to be default
The first permissible value scope, then to the passage current base output valve carry out output compensation, each channel compensation it is complete after perform step
d；
If size of the difference is outside the second permissible value scope, starts benchmark compensation detection, read the channel voltage a reference value, and
The voltage reference value is compared with given voltage reference value, its difference is obtained, if the size of the difference is in benchmark allowed band value,
Then current channel exits compensation；If the size of the difference is outside benchmark allowed band value, base is carried out to the channel voltage a reference value
Quasi- compensation, step e is performed after each channel compensation is complete；Wherein, the absolute value of the second permissible value is more than the absolute value of the first permissible value；
D. all passages detect the difference of the current output valve and standard output value drawn in the range of the first permissible value again,
Then complete output compensation, the repeat step since a；Otherwise to all differences passage not in the range of the first permissible value again
Carry out output compensation, and repeat step d；If compensating number of times to be more than after default maximum compensation number of times, step f is performed；
E. all passages again read off measured current voltage a reference value with the difference of desired standard value in benchmark allowed band
It is worth in size, then completes benchmark compensation, the repeat step since a；Otherwise to the difference not in benchmark allowed band value size
Passage carry out benchmark compensation, and repeat step e again；If compensating number of times to be more than after default maximum compensation number of times, perform
Step f；
F. a certain passage is after Continuous Compensation number of times is more than default maximum compensation number of times, and host computer will be sent out after the path marking
Go out maintenance warning, and the repeat step since a.
2. the voltage accuracy of voltage calibration equipment according to claim 1 corrects adjusting process automatically, it is characterised in that：Institute
The preset loop number of times for stating loop test is 5 times.
3. the voltage accuracy of voltage calibration equipment according to claim 1 corrects adjusting process automatically, it is characterised in that：Institute
State output compensation and mended by biasing compensation of the output offset realization to current output valve, the benchmark to current base output valve
Repay by realizing the compensation for current voltage a reference value to voltage reference value biased reference offset.
4. the voltage accuracy of voltage calibration equipment according to claim 3 corrects adjusting process automatically, it is characterised in that：Institute
It is respectively 16 data being stored in two bytes that output offset, which is stated, with benchmark offset, including for judging that the output is mended
The conversion position of difference and the difference position for saved differences, the output compensation need to be added up or reduce by repaying value and voltage reference value
Value uses 1 byte saved differences position using 1 byte storage conversion position；The benchmark offset is deposited using 0.5 byte
Storage conversion position, and use 1.5 byte saved differences positions.
5. the voltage accuracy of voltage calibration equipment according to claim 4 corrects adjusting process automatically, it is characterised in that：Institute
The conversion position for stating output offset or benchmark offset is stored in the high position of upper byte, and the difference is stored in low byte
Low level.
6. the voltage accuracy of voltage calibration equipment according to claim 4 corrects adjusting process automatically, it is characterised in that：When
Position convert when being 0, the benchmark output valve or voltage reference value of current channel add up the difference that difference position is stored；When conversion position is
When 1, the benchmark output valve or voltage reference value of current channel subtract the difference that difference position is stored.
7. the voltage accuracy of voltage calibration equipment according to claim 1 corrects adjusting process automatically, it is characterised in that：Institute
The first permissible value scope is stated for ± 2MV, the second permissible value scope is ± 10MV, the benchmark allowed band value for ±
0.25MV。
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| CN105891760B (en) * | 2016-05-18 | 2018-07-10 | 电子科技大学 | Digital oscilloscope vertical sensitivity automatic correcting method |
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| CN111044964A (en) * | 2019-12-31 | 2020-04-21 | 惠州市蓝微电子有限公司 | Voltage and current reference debugging method and device |
| CN113654715B (en) * | 2021-07-13 | 2023-07-25 | 武汉飞恩微电子有限公司 | Temperature compensation method, device and equipment of water pressure sensor and storage medium |
| CN113504005A (en) * | 2021-07-13 | 2021-10-15 | 武汉飞恩微电子有限公司 | Calibration method, device and equipment of pressure sensor and storage medium |
| CN114895231B (en) * | 2022-07-12 | 2022-10-21 | 南京宏泰半导体科技有限公司 | High-end voltage differential sampling calibration system and method |
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