CN105973947A - Measuring method and system of TDS values - Google Patents
Measuring method and system of TDS values Download PDFInfo
- Publication number
- CN105973947A CN105973947A CN201610401968.4A CN201610401968A CN105973947A CN 105973947 A CN105973947 A CN 105973947A CN 201610401968 A CN201610401968 A CN 201610401968A CN 105973947 A CN105973947 A CN 105973947A
- Authority
- CN
- China
- Prior art keywords
- value
- tds
- water quality
- sampling
- tds value
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 37
- 238000005070 sampling Methods 0.000 claims abstract description 162
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 151
- 238000005259 measurement Methods 0.000 claims abstract description 88
- 239000000523 sample Substances 0.000 claims description 94
- 239000007864 aqueous solution Substances 0.000 claims description 89
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 3
- 239000000243 solution Substances 0.000 claims description 2
- 241000208340 Araliaceae Species 0.000 description 7
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 7
- 235000003140 Panax quinquefolius Nutrition 0.000 description 7
- 235000008434 ginseng Nutrition 0.000 description 7
- 239000007787 solid Substances 0.000 description 5
- 239000003990 capacitor Substances 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 238000000151 deposition Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical group [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/06—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a liquid
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N2001/1062—Sampling under constant temperature, pressure, or the like
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biochemistry (AREA)
- Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Hydrology & Water Resources (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The invention discloses a measuring method and system of TDS values. The measuring method includes the steps that a water quality sampling value of a to-be-measured water solution collected by a sampling circuit is obtained; a first TDS value of the to-be-measured water solution at a reference temperature is calculated according to the water quality sampling value; the actual temperature of the to-be-measured water solution is collected; whether the actual temperature and the reference temperature are the same or not is judged; when the actual temperature and reference temperature are the same, the first TDS value is determined as the final measurement value; or, when the actual temperature and the reference temperature are different, the first TDS value is compensated to be a second TDS value according to difference between the actual temperature and the reference temperature, and the second TDS value is determined as the final measurement value. According to the measuring method and system of TDS values, the first TDS value of the to-be-measured water solution at the reference temperature is measured in a calculation mode; when the actual temperature of the to-be-measured water solution is different from the reference temperature, the first TDS value is compensated, it is guaranteed that the error rate of measurement is small, and precision of measurement is improved.
Description
Technical field
The present invention relates to the measurement skill of aqueous solution TDS (Total dissolved solids, total dissolved solidss) value
Art field, more specifically, relates to measuring method and the measurement system of a kind of TDS value.
Background technology
The solid that total dissolved solid (TDS, Total dissolved solids) refers to be dissolved in the water total
Amount, units of measurement is parts per millions or mg/L, milligram/Liter, and physical significance is in 1 liter of water
Dissolved with how many milligrams of total dissolved solids.Popular says, TDS value represents solute impurity content in water,
TDS value is the biggest, illustrates that the impurity content in water is the biggest, water quality inferiority；Otherwise, impurity content is little, and water quality is good.
It is the size of the TDS value of water currently for the maximally effective criterion of water quality, owing to TDS value is the biggest,
The electric conductivity of water is the best, and its conductivity value is the biggest；TDS value is the least, and electric conductivity is the poorest, and electrical conductivity is also
The least, obtain aqueous solution thus, it is possible to searched by the conductivity degree of sample circuit acquisition aqueous solution
TDS value.But, it is dense that existing this lookup method needs to gather substantial amounts of difference by sample circuit in advance
The sampled value of the aqueous solution of the known TDS value of degree, and record in lookup table, existing this lookup side
Method measures TDS value underaction, and occurs that the probability searching mistake is bigger；And, sample circuit is right
The same aqueous solution of different temperatures has deviation when being acquired, and then causes the result of lookup and actual TDS
Differing greatly of value, measures precision relatively low.
Summary of the invention
In view of this, the invention provides measuring method and the measurement system of a kind of TDS value, by calculating side
Formula measures a TDS value of aqueous solution to be measured under reference temperature；And in the actual temperature of aqueous solution to be measured
Time different from reference temperature, a TDS value is compensated to eliminate deviation, it is ensured that the wrong probability of measurement
Little, and improve the precision of measurement.
For achieving the above object, the technical scheme that the present invention provides is as follows:
A kind of measuring method of TDS value, including:
Obtain the water quality sampling value of the aqueous solution to be measured that sample circuit is gathered；
A TDS value of described aqueous solution to be measured under reference temperature is calculated according to described water quality sampling value；
Gather the actual temperature of described aqueous solution to be measured；
Judge that described actual temperature is the most identical with reference temperature；
When described actual temperature is identical with reference temperature, determine that a described TDS value is for final measured value；
Or, when described actual temperature differs with reference temperature, according to described actual temperature and reference temperature
Difference to compensate a described TDS value be the 2nd TDS value, and determine described 2nd TDS value
For final measured value.
Optionally, described according to described water quality sampling value calculating described aqueous solution to be measured under reference temperature
Oneth TDS value, including:
Described water quality sampling value is converted to water quality sampling resistance value；
Calculate under described reference temperature the first of described aqueous solution to be measured according to described water quality sampling resistance value
TDS value.
Optionally, described described to be measured under described reference temperature according to the calculating of described water quality sampling resistance value
Oneth TDS value of aqueous solution, including:
Search pre-stored data storehouse, determine the sampling interval at described water quality sampling value place, wherein, described pre-
Deposit data storehouse includes the data of multiple sampling interval-deviation factor-deviation constant, and any one sampling interval is institute
State that sample circuit gathers from low paramount multiple known TDS values and at the measurement aqueous solution of described reference temperature
Obtained multiple measurement sampled values and corresponding measurement TDS value, and according to described sampled value-measurement TDS
The interval that all measurement sampled values are divided in multiple interval by the slope variation of value；
According to the deviation system that described water quality sampling resistance is corresponding with the sampling interval at described water quality sampling value place
Number and deviation constant, calculate a TDS value of described aqueous solution to be measured under described reference temperature.
Optionally, described described water quality sampling value is converted to water quality sampling resistance value, including:
According to formula RWater quality=R1*ADWater quality/(ADSampling-ADWater quality), described water quality sampling value is converted to
Water quality sampling resistance value；
Wherein, RWater qualityFor described water quality sampling resistance value, R1For in two probe circuitry of described sample circuit
Resistance and, ADWater qualityFor described water quality sampling value, and, ADSamplingMaximum for described sample circuit is adopted
Sample value.
Optionally, the described sampling interval according to described water quality sampling resistance Yu described water quality sampling value place
Corresponding deviation factor and deviation constant, calculate under described reference temperature the first of described aqueous solution to be measured
TDS value, including:
According to formula TDSReference=(a*RWater quality+b)/RWater quality/ 2, calculate and treat described under described reference temperature
Survey a TDS value of aqueous solution；
Wherein, TDSReferenceFor a described TDS value, a is deviation factor, and, b is deviation constant.
Optionally, described when described actual temperature differs with reference temperature, according to described actual temperature
Compensating a described TDS value with the difference of reference temperature is the 2nd TDS value, including:
According to formula TDSCompensate=TDSReference*[1+β*(TActual-TReference)], in described actual temperature and reference
When temperature differs, compensating a described TDS value is the 2nd TDS value；
Wherein, TDSCompensateFor described 2nd TDS value, β is temperature compensation coefficient, TActualFor described reality
Temperature, and, TReferenceFor described reference temperature.
Optionally, the pre-storage method of described sampling interval-deviation factor-deviation constant includes:
The two probe middle sections according to described sample circuit amass the sectional area of little probe divided by two probes between
Distance obtain with reference to deviation factor；
Obtain a known TDS value that described sample circuit gathered and water-soluble in the reference of described reference temperature
The reference water quality sampling value of liquid；
According to described with reference to deviation factor with reference to water quality sampling value calculating reference measure TDS value；
Calculate the described actual TDS value with reference to aqueous solution and deduct the difference of reference measure TDS value for reference to partially
Difference constant；
Obtain that described sample circuit gathered from low paramount multiple known TDS values and in described reference temperature
Measure the multiple measurement sampled values obtained by aqueous solution, and according to described with reference to deviation factor, with reference to partially
Sampling resistor value of measuring after difference constant and measurement sampled value conversion calculates the measurement of all measurement aqueous solutions
TDS value；
Draw described measurement sampled value and the corresponding change curve measuring TDS value；
It is multiple adopting that slope variation according to described change curve divides multiple intervals to all measurement sampled values
Sample is interval；
The slope determining the part of the corresponding described change curve of described sampling interval is described sampling interval-deviation
Deviation factor in coefficient-deviation constant, and, corresponding with described sampling interval according to described deviation factor
A measurement TDS value and corresponding to measure the described sampling interval-deviation factor-deviation of sampling resistor value calculating normal
Deviation constant in number.
Accordingly, present invention also offers the measurement system of a kind of TDS value, including:
Acquisition module, for obtaining the water quality sampling value of the aqueous solution to be measured that sample circuit is gathered；
Computing module, for calculating described aqueous solution to be measured under reference temperature according to described water quality sampling value
A TDS value；
Acquisition module, for gathering the actual temperature of described aqueous solution to be measured；
Judge module, is used for judging that described actual temperature is the most identical with reference temperature；
And, determine module, for when described actual temperature is identical with reference temperature, determine described the
One TDS value is final measured value；Or, when described actual temperature differs with reference temperature, according to
It is the 2nd TDS value that a described TDS value is compensated by the difference of described actual temperature and reference temperature,
And determine that described 2nd TDS value is for final measured value.
Optionally, described computing module includes:
Modular converter, for being converted to water quality sampling resistance value by described water quality sampling value；
And, processing module, for calculating under described reference temperature according to described water quality sampling resistance value
Oneth TDS value of described aqueous solution to be measured.
Optionally, described processing module includes:
Search module, be used for searching pre-stored data storehouse, determine the sampling interval at described water quality sampling value place,
Wherein, described pre-stored data storehouse includes the data of multiple sampling interval-deviation factor-deviation constant, any one
Sampling interval be described sample circuit gather from low paramount multiple known TDS values and in described reference temperature
Measure the multiple measurement sampled values obtained by aqueous solution and corresponding measure TDS value, and according to described sampling
The interval that all measurement sampled values are divided in multiple interval by the slope variation of value-measurement TDS value；
And, calculating sub module, for according to described water quality sampling resistance and described water quality sampling value place
Deviation factor corresponding to sampling interval and deviation constant, calculate described water to be measured under described reference temperature
Oneth TDS value of solution.
Compared to prior art, the technical scheme that the present invention provides at least has the advantage that
The invention provides measuring method and the measurement system of a kind of TDS value, including: obtain sample circuit
The water quality sampling value of the aqueous solution to be measured gathered；Calculate under reference temperature according to described water quality sampling value
Oneth TDS value of described aqueous solution to be measured；Gather the actual temperature of described aqueous solution to be measured；Judge described
Actual temperature is the most identical with reference temperature；When described actual temperature is identical with reference temperature, determine institute
State a TDS value for final measured value；Or, when described actual temperature differs with reference temperature,
It is the 2nd TDS that a described TDS value is compensated by the difference according to described actual temperature and reference temperature
Value, and determine that described 2nd TDS value is for final measured value.The technical scheme that the present invention provides, by meter
Calculation mode measures a TDS value of aqueous solution to be measured under reference temperature；And in the reality of aqueous solution to be measured
When border temperature is different from reference temperature, a TDS value is compensated to eliminate deviation, it is ensured that measurement
Mistake probability is little, and improves the precision of measurement.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to reality
Execute the required accompanying drawing used in example or description of the prior art to be briefly described, it should be apparent that below,
Accompanying drawing in description is only embodiments of the invention, for those of ordinary skill in the art, not
On the premise of paying creative work, it is also possible to obtain other accompanying drawing according to the accompanying drawing provided.
The flow chart of the measuring method of a kind of TDS value that Fig. 1 provides for the embodiment of the present application；
The structural representation of a kind of sample circuit that Fig. 2 provides for the embodiment of the present application；
The flow chart of the measuring method of the another kind of TDS value that Fig. 3 provides for the embodiment of the present application；
The flow chart of the measuring method of another TDS value that Fig. 4 provides for the embodiment of the present application；
The structural representation of the measurement system of a kind of TDS value that Fig. 5 provides for the embodiment of the present application；
The structural representation of the measurement system of the another kind of TDS value that Fig. 6 provides for the embodiment of the present application.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the present invention, and
It is not all, of embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art are not doing
Go out the every other embodiment obtained under creative work premise, broadly fall into the scope of protection of the invention.
As described in background, existing this lookup method needs to be gathered greatly by sample circuit in advance
The sampled value of aqueous solution of the difference known TDS value of amount, and record in lookup table, existing this looks into
Look for method to measure TDS value underaction, and occur that the probability searching mistake is bigger；And, sample circuit
Have deviation when the same aqueous solution of different temperatures is acquired, and then cause result and the reality searched
Differing greatly of border TDS value, measures precision relatively low.
Based on this, the embodiment of the present application provides measuring method and the measurement system of a kind of TDS value, by meter
Calculation mode measures a TDS value of aqueous solution to be measured under reference temperature；And in the reality of aqueous solution to be measured
When temperature is different from reference temperature, a TDS value is compensated to eliminate deviation, it is ensured that the mistake of measurement
Probability is little, and improves the precision of measurement.For achieving the above object, the skill that the embodiment of the present application provides
Art scheme is as follows, specifically combines shown in Fig. 1 to Fig. 6, and the technical scheme providing the embodiment of the present application is carried out
Detailed description.
With reference to shown in Fig. 1, the flow chart of the measuring method of a kind of TDS value provided for the embodiment of the present application,
Measuring method includes:
The water quality sampling value of the aqueous solution to be measured that S1, acquisition sample circuit are gathered；
S2, according to described water quality sampling value calculate under reference temperature a TDS of described aqueous solution to be measured
Value；
S3, gather the actual temperature of described aqueous solution to be measured；
S4, judge that described actual temperature is the most identical with reference temperature；
S5, when described actual temperature is identical with reference temperature, determine that a described TDS value is surveyed for final
Value；Or, when described actual temperature differs with reference temperature, according to described actual temperature and ginseng
Examining the difference of temperature and compensating a described TDS value is the 2nd TDS value, and determines described second
TDS value is final measured value.
The sample circuit that the embodiment of the present application provides, with specific reference to shown in Fig. 2, provides for the embodiment of the present application
The structural representation of a kind of sample circuit, wherein, it is the first probe that sample circuit includes two probes
Q-A and the second probe Q-B, the first probe Q-A and the second probe Q-B are all electrically connected with main control chip IC
Connect, and between the first probe Q-A and main control chip IC, connection has one first resistance R1 ', and the second probe
Connect between Q-B and main control chip IC and have one second resistance R2 '.In the embodiment of the present application, the first electricity
Resistance R1 ' and the second resistance R2 ' can be all adjustable resistance, and minimum adjustable most 0 Europe of the second resistance R2 '
Nurse.
It addition, in the sample circuit that the embodiment of the present application provides, also include that one end is connected to the first resistance
Current-limiting resistance R3 ' between R1 ' and the first probe Q-A, and, the other end of current-limiting resistance R3 ' and master control
The sample port of chip IC and a pole plate of a filter capacitor C are all connected with, and another pole of filter capacitor C
Plate earthing.Wherein, it is excessive that current-limiting resistance R3 ' is used for preventing flowing into the electric current within main control chip IC, and
Gathered the voltage of aqueous solution by current-limiting resistance R3 ', filter capacitor C is used for filtering clutter.In the application
In embodiment, two probes that sample circuit includes, the i.e. first probe Q-A and the second probe Q-B is gold
Belong to probe.
Wherein, main control chip IC is used for providing for the first probe Q-A and the second probe Q-B driving signal,
By driving signal that aqueous solution is applied voltage, the sample port collection then connected by current-limiting resistance R3 '
The analog voltage produced in aqueous solution, and analog voltage is converted to through its internal analog-to-digital conversion module
The sampled value that digital quantity represents.Concrete, main control chip IC is to the first probe Q-A and the second probe Q-B
The driving signal provided is alternating current drive signal, i.e. when the level of a probe is high, another probe
Level is low, and the embodiment of the present application is high level and the second probe Q-B is low at the first probe Q-A
Sample during level, and when sampling, the second resistance R2 ' is preferably adjusted to 0 ohm；Additionally, the application is real
Execute example the sample frequency of sample circuit is not particularly limited.
In the application one embodiment, when calculating a TDS value, water quality sampling value can be converted to
Water quality sampling resistance value calculates, with reference to shown in Fig. 3, and the another kind of TDS provided for application embodiment
The flow chart of measuring method of value, wherein, described calculates under reference temperature according to described water quality sampling value
Oneth TDS value of described aqueous solution to be measured, i.e. step S2 includes:
S21, described water quality sampling value is converted to water quality sampling resistance value；
S22, according to described water quality sampling resistance value calculate under described reference temperature described aqueous solution to be measured
Oneth TDS value.
Further, for above-mentioned calculating TDS value of aqueous solution to be measured under reference temperature, i.e.
Parameter required for calculating a TDS value is to prestore under reference temperature, more specifically, and ginseng
Examine shown in Fig. 4, for the flow chart of measuring method of another TDS value that the embodiment of the present application provides, its
In, described according to described water quality sampling resistance value calculating described aqueous solution to be measured under described reference temperature
Oneth TDS value, i.e. step S22 includes:
S221, search pre-stored data storehouse, determine the sampling interval at described water quality sampling value place, wherein,
Described pre-stored data storehouse includes the data of multiple sampling interval-deviation factor-deviation constant, any one sample region
Between be described sample circuit gather from low paramount multiple known TDS values and in the measurement of described reference temperature
Multiple measurement sampled values obtained by aqueous solution and corresponding measurement TDS value, and according to described sampled value-measurement
The interval that all measurement sampled values are divided in multiple interval by the slope variation of TDS value；
S222, corresponding with the sampling interval at described water quality sampling value place according to described water quality sampling resistance
Deviation factor and deviation constant, calculate a TDS value of described aqueous solution to be measured under described reference temperature.
That is, when calculating a TDS value, the data of sampling interval-deviation factor-deviation constant are in advance
Store, and all data are all to measure to obtain or calculated based on reference temperature.
According to above-mentioned measurement process, in the embodiment of the present application, described by the conversion of described water quality sampling value
For water quality sampling resistance value, including:
According to formula RWater quality=R1*ADWater quality/(ADSampling-ADWater quality), described water quality sampling value is converted to
Water quality sampling resistance value；
Wherein, RWater qualityFor described water quality sampling resistance value, R1For in two probe circuitry of described sample circuit
Resistance and (that is, the sum of first resistance R1 ' the+the second resistance R2 ' in Fig. 1), ADWater qualityFor described water quality
Sampled value, and, ADSamplingMaximum sampled value for described sample circuit.
And, the described sampling interval pair according to described water quality sampling resistance Yu described water quality sampling value place
The deviation factor answered and deviation constant, calculate under described reference temperature the first of described aqueous solution to be measured
TDS value, including:
According to formula TDSReference=(a*RWater quality+b)/RWater quality/ 2, calculate and treat described under described reference temperature
Survey a TDS value of aqueous solution；
Wherein, TDSReferenceFor a described TDS value, a is deviation factor, and, b is deviation constant.
Optionally, described when described actual temperature differs with reference temperature, according to described actual temperature
Compensating a described TDS value with the difference of reference temperature is the 2nd TDS value, including:
According to formula TDSCompensate=TDSReference*[1+β*(TActual-TReference)], in described actual temperature and reference
When temperature differs, compensating a described TDS value is the 2nd TDS value；
Wherein, TDSCompensateFor described 2nd TDS value, β is temperature compensation coefficient, TActualFor described reality
Temperature, and, TReferenceFor described reference temperature.
As shown in the above, the technical scheme that the embodiment of the present application provides, by above three formula i.e.
The TDS value of aqueous solution to be measured can be measured.Concrete, first pass through sample circuit and aqueous solution to be measured is carried out
Gather, and obtain the water quality sampling value of the collection of sample circuit；Then by formula RWater quality=R1*ADWater quality/
(ADSampling-ADWater quality), water quality sampling value is converted to water quality sampling resistance value；Hereafter, at pre-stored data
Storehouse searches which sampling interval is water quality sampling value be positioned at, looks in pre-stored data storehouse after determining sampling interval
Go out corresponding deviation factor and deviation constant, and according to formula TDSReference=(a*RWater quality+b)/RWater quality/ 2 calculate
Oneth TDS value of aqueous solution to be measured, wherein, due to each of sampling interval-deviation factor-deviation constant
Parameter value is all by measuring the measurement aqueous solution of multiple reference temperatures or calculated, therefore,
Oneth TDS value is expressed as the value under reference temperature；Owing to the actual temperature of aqueous solution to be measured may be with ginseng
Examine temperature different, it is therefore desirable to when both are different, a TDS value is compensated, so logical
Cross formula TDSCompensate=TDSReference*[1+β*(TActual-TReference)] a TDS value can be compensated into
2nd TDS value, obtains final TDS value.It should be noted that when actual temperature and reference temperature phase
Meanwhile, then the final TDS value measured by method that a TDS value provides for the application.
In the above-described embodiments, need by searching pre-stored data storehouse to obtain each of calculating the oneth TDS value
Individual parameter, prestores to parameters in pre-stored data storehouse below and is specifically described.Wherein, for this
The pre-stored data storehouse that application embodiment provides, its interior described sampling interval-deviation factor-deviation constant pre-
The method of depositing may include that
The sectional area of little probe is amassed divided by two probes in S10, two probe middle sections according to described sample circuit
Between distance obtain with reference to deviation factor.
Wherein, the sectional area of two probes of the preferred sample circuit of the embodiment of the present application is identical, the most permissible
Determined with reference to deviation factor by any one probe.Additionally, when the cross-sectional area difference of two probes,
The embodiment of the present application determines with reference to bias system with the probe that sectional area is little.
S20, obtain a known TDS value that described sample circuit gathered and the ginseng in described reference temperature
Examine the reference water quality sampling value of aqueous solution.
S30, according to described with reference to deviation factor and with reference to water quality sampling value calculate reference measure TDS value；
When calculating reference measure TDS value, can first will be converted to reference to water quality with reference to water quality sampling value
Sampling resistor value, i.e. by formula RWith reference to water quality=R1*ADWith reference to water quality/(ADSampling-ADWith reference to water quality) calculate ginseng
Examine water quality sampling resistance value, wherein, RWith reference to water qualityFor with reference to water quality sampling resistance value, R1For sample circuit
Resistance in two probe circuitry and, ADWith reference to water qualityFor with reference to water quality sampling value, and, ADSamplingAdopt for described
The maximum sampled value of sample circuit.
Then, according to formula TDSWith reference to water quality=(aReference*RWith reference to water quality)/RWith reference to water quality/ 2 rough calculation reference measures
TDS value, wherein, aReferenceFor with reference to deviation factor.
S40, calculate the difference that the described actual TDS value with reference to aqueous solution deducts reference measure TDS value and be
With reference to deviation constant.
S50, obtain that described sample circuit gathered from low paramount multiple known TDS values and in described ginseng
Examine the multiple measurement sampled values obtained by aqueous solution of measuring of temperature, and according to described with reference to deviation factor,
All measurement aqueous solutions are calculated with reference to the sampling resistor value of measuring after deviation constant and measurement sampled value conversion
Measure TDS value.
Above-mentioned steps is calculated with reference to deviation factor aReferenceWith reference deviation constant bReferenceAfter, according to
With reference to deviation factor aReferenceWith reference deviation constant bReferenceMultiple known TDS value can be calculated and in described ginseng
Examine the measurement TDS value measuring aqueous solution of temperature.
That is, due to reference to deviation factor aReferenceWith reference deviation constant bReferenceDetermination, can be in conjunction with formula RMeasure=R1*ADMeasure/(ADSampling-ADMeasure) and formula TDSMeasure=(aReference*RMeasure+bReference)/RMeasure/ 2 is right
The measurement TDS value of each measurement aqueous solution calculates, wherein, and RMeasureFor measuring sampled value ADMeasureTurn
Measurement sampling resistor value after changing, TDSMeasureFor measuring TDS value.
Wherein, from low paramount multiple known TDS values can be the multiple measurements from 1ppm to 1000ppm
Aqueous solution, and multiple measurement aqueous solution can be chosen, to this embodiment of the present application not with 50ppm for interval
Do concrete restriction.
S60, draw described measurement sampled value and the corresponding change curve measuring TDS value.
S70, according to the slope variation of described change curve, all measurement sampled values to be divided multiple intervals be many
Individual sampling interval.
The application can be plotted as measuring sampled value with corresponding actual TDS value (i.e., it is known that TDS value)
One theoretical change curve, and sampled value is measured in definition and the corresponding change curve measuring TDS value becomes for measuring
Change curve, then this theory change curve is contrasted with measuring change curve, with to measuring change song
Line carries out multistage division, and the slope of every section is roughly the same with the slope of this section of theoretical change curve, i.e.
The curve of multiple measurement TDS composition of every section, its slope is all being permitted compared with the change of corresponding theory change curve
In the range of Xuing.
S80, the slope determining the part of the corresponding described change curve of described sampling interval are described sampling interval
Deviation factor in-deviation factor-deviation constant, and, according to described deviation factor and described sampling interval
A corresponding measurement TDS value and corresponding sampling resistor value of measuring calculate described sampling interval-deviation factor-inclined
Deviation constant in difference constant.
After all measurement sampled values are carried out demarcation interval, the slope in each interval is sampling interval-partially
Deviation factor in difference coefficient-deviation constant, and according to the deviation factor in each interval, one measure TDS value
Sampled value, and reference formula R is measured with correspondenceMeasure=R1*ADMeasure/(ADSampling-ADMeasure) and TDSMeasure
=(a*RMeasure+b)/RMeasure/ 2 calculate deviation constant b in sampling interval-deviation factor-deviation constant.
For example, it is possible to definition ADSamplingBeing 4095, finally can obtain a pre-stored data storehouse is:
Further, for the parameter in pre-stored data storehouse, can take multiple measurements according to said method
And calculating, then repetitive measurement data are accurately debugged, as the meansigma methods etc. of each parameter can be taken
Accurately debugging, to reach optimal effectiveness.
It addition, the reference temperature that the embodiment of the present application provides can be room temperature 25 degrees Celsius.Additionally, for
The temperature compensation coefficient that the embodiment of the present application provides, its general numerical value is 2%.Further to this, if
Result that measurement obtains and notional result deviation can be made when using 2% in actual applications relatively big, can be to it
Adjusting accordingly, can adjust it is the numerical value such as 1.5%, 3%, adjusts its numerical value and makes finally to measure knot
Fruit approximates with theoretical value, and deviation is in allowed band.
Accordingly, the embodiment of the present application additionally provides the measurement system of a kind of TDS value, with reference to shown in Fig. 5,
For the structural representation of measurements system of a kind of TDS value that the embodiment of the present application provides, wherein, measurement is
System includes:
Acquisition module 100, for obtaining the water quality sampling value of the aqueous solution to be measured that sample circuit is gathered；
Computing module 200, for calculating under reference temperature described to be measured water-soluble according to described water quality sampling value
Oneth TDS value of liquid；
Acquisition module 300, for gathering the actual temperature of described aqueous solution to be measured；
Judge module 400, is used for judging that described actual temperature is the most identical with reference temperature；
And, determine module 500, for when described actual temperature is identical with reference temperature, determine described
Oneth TDS value is final measured value；Or, when described actual temperature differs with reference temperature, root
Compensating a described TDS value according to the difference of described actual temperature and reference temperature is the 2nd TDS
Value, and determine that described 2nd TDS value is for final measured value.
Further, with reference to shown in Fig. 6, for the measurement of the another kind of TDS value that the embodiment of the present application provides
The structural representation of system, wherein, described computing module 200 includes:
Modular converter 210, for being converted to water quality sampling resistance value by described water quality sampling value；
And, processing module 220, for calculating in described reference temperature according to described water quality sampling resistance value
Under a TDS value of described aqueous solution to be measured.
Wherein, with reference to shown in Fig. 5, the described processing module 220 that the embodiment of the present application provides includes:
Search module 221, be used for searching pre-stored data storehouse, determine the sample region at described water quality sampling value place
Between, wherein, described pre-stored data storehouse includes the data of multiple sampling interval-deviation factor-deviation constant, appoints
A sampling interval of anticipating be described sample circuit gather from low paramount multiple known TDS values and in described reference
Multiple measurement sampled values obtained by the measurement aqueous solution of temperature and corresponding measurement TDS value, and according to described
All measurement sampled values are divided into multiple interval Zhong mono-district by the slope variation of sampled value-measurement TDS value
Between；
And, calculating sub module 222, for according to described water quality sampling resistance and described water quality sampling value institute
Deviation factor corresponding to sampling interval and deviation constant, calculate described to be measured under described reference temperature
Oneth TDS value of aqueous solution.
The embodiment of the present application provides measuring method and the measurement system of a kind of TDS value, including: obtain and adopt
The water quality sampling value of the aqueous solution to be measured that sample circuit is gathered；Calculate in reference according to described water quality sampling value
At a temperature of a TDS value of described aqueous solution to be measured；Gather the actual temperature of described aqueous solution to be measured；Sentence
Disconnected described actual temperature is the most identical with reference temperature；When described actual temperature is identical with reference temperature,
Determine that a described TDS value is for final measured value；Or, in described actual temperature and reference temperature not phase
Meanwhile, compensating a described TDS value according to the difference of described actual temperature and reference temperature is
Two TDS values, and determine that described 2nd TDS value is for final measured value.The technology that the embodiment of the present application provides
Scheme, measures a TDS value of aqueous solution to be measured under reference temperature by calculation；And treating
When the actual temperature of survey aqueous solution is different from reference temperature, a TDS value is compensated to eliminate deviation,
Ensure that the wrong probability measured is little, and improve the precision of measurement.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses
The present invention.Multiple amendment to these embodiments will be aobvious and easy for those skilled in the art
See, generic principles defined herein can without departing from the spirit or scope of the present invention,
Realize in other embodiments.Therefore, the present invention is not intended to be limited to the embodiments shown herein,
And it is to fit to the widest scope consistent with principles disclosed herein and features of novelty.
Claims (10)
1. the measuring method of a TDS value, it is characterised in that including:
Obtain the water quality sampling value of the aqueous solution to be measured that sample circuit is gathered；
A TDS value of described aqueous solution to be measured under reference temperature is calculated according to described water quality sampling value；
Gather the actual temperature of described aqueous solution to be measured；
Judge that described actual temperature is the most identical with reference temperature；
When described actual temperature is identical with reference temperature, determine that a described TDS value is for final measured value；
Or, when described actual temperature differs with reference temperature, according to described actual temperature and reference temperature
Difference to compensate a described TDS value be the 2nd TDS value, and determine described 2nd TDS value
For final measured value.
The measuring method of TDS value the most according to claim 1, it is characterised in that described according to institute
State water quality sampling value and calculate a TDS value of described aqueous solution to be measured under reference temperature, including:
Described water quality sampling value is converted to water quality sampling resistance value；
Calculate under described reference temperature the first of described aqueous solution to be measured according to described water quality sampling resistance value
TDS value.
The measuring method of TDS value the most according to claim 2, it is characterised in that described according to institute
State water quality sampling resistance value and calculate a TDS value of described aqueous solution to be measured under described reference temperature, bag
Include:
Search pre-stored data storehouse, determine the sampling interval at described water quality sampling value place, wherein, described pre-
Deposit data storehouse includes the data of multiple sampling interval-deviation factor-deviation constant, and any one sampling interval is institute
State that sample circuit gathers from low paramount multiple known TDS values and at the measurement aqueous solution of described reference temperature
Obtained multiple measurement sampled values and corresponding measurement TDS value, and according to described sampled value-measurement TDS
The interval that all measurement sampled values are divided in multiple interval by the slope variation of value；
According to the deviation system that described water quality sampling resistance is corresponding with the sampling interval at described water quality sampling value place
Number and deviation constant, calculate a TDS value of described aqueous solution to be measured under described reference temperature.
The measuring method of TDS value the most according to claim 2, it is characterised in that described by described
Water quality sampling value is converted to water quality sampling resistance value, including:
According to formula RWater quality=R1*ADWater quality/(ADSampling-ADWater quality), described water quality sampling value is converted to
Water quality sampling resistance value；
Wherein, RWater qualityFor described water quality sampling resistance value, R1For in two probe circuitry of described sample circuit
Resistance and, ADWater qualityFor described water quality sampling value, and, ADSamplingMaximum for described sample circuit is adopted
Sample value.
The measuring method of TDS value the most according to claim 4, it is characterised in that described according to institute
State the water quality sampling resistance deviation factor corresponding with the sampling interval at described water quality sampling value place and deviation is normal
Number, calculates a TDS value of described aqueous solution to be measured under described reference temperature, including:
According to formula TDSReference=(a*RWater quality+b)/RWater quality/ 2, calculate and treat described under described reference temperature
Survey a TDS value of aqueous solution；
Wherein, TDSReferenceFor a described TDS value, a is deviation factor, and, b is deviation constant.
The measuring method of TDS value the most according to claim 5, it is characterised in that described described
When actual temperature and reference temperature differ, according to the difference of described actual temperature and reference temperature to described
It is the 2nd TDS value that oneth TDS value compensates, including:
According to formula TDSCompensate=TDSReference*[1+β*(TActual-TReference)], in described actual temperature and reference
When temperature differs, compensating a described TDS value is the 2nd TDS value；
Wherein, TDSCompensateFor described 2nd TDS value, β is temperature compensation coefficient, TActualFor described reality
Temperature, and, TReferenceFor described reference temperature.
The measuring method of TDS value the most according to claim 3, it is characterised in that described sample region
The pre-storage method of m-deviation factor-deviation constant includes:
The two probe middle sections according to described sample circuit amass the sectional area of little probe divided by two probes between
Distance obtain with reference to deviation factor；
Obtain a known TDS value that described sample circuit gathered and water-soluble in the reference of described reference temperature
The reference water quality sampling value of liquid；
According to described with reference to deviation factor with reference to water quality sampling value calculating reference measure TDS value；
Calculate the described actual TDS value with reference to aqueous solution and deduct the difference of reference measure TDS value for reference to partially
Difference constant；
Obtain that described sample circuit gathered from low paramount multiple known TDS values and in described reference temperature
Measure the multiple measurement sampled values obtained by aqueous solution, and according to described with reference to deviation factor, with reference to partially
Sampling resistor value of measuring after difference constant and measurement sampled value conversion calculates the measurement of all measurement aqueous solutions
TDS value；
Draw described measurement sampled value and the corresponding change curve measuring TDS value；
It is multiple adopting that slope variation according to described change curve divides multiple intervals to all measurement sampled values
Sample is interval；
The slope determining the part of the corresponding described change curve of described sampling interval is described sampling interval-deviation
Deviation factor in coefficient-deviation constant, and, corresponding with described sampling interval according to described deviation factor
A measurement TDS value and corresponding to measure the described sampling interval-deviation factor-deviation of sampling resistor value calculating normal
Deviation constant in number.
8. the measurement system of a TDS value, it is characterised in that including:
Acquisition module, for obtaining the water quality sampling value of the aqueous solution to be measured that sample circuit is gathered；
Computing module, for calculating described aqueous solution to be measured under reference temperature according to described water quality sampling value
A TDS value；
Acquisition module, for gathering the actual temperature of described aqueous solution to be measured；
Judge module, is used for judging that described actual temperature is the most identical with reference temperature；
And, determine module, for when described actual temperature is identical with reference temperature, determine described the
One TDS value is final measured value；Or, when described actual temperature differs with reference temperature, according to
It is the 2nd TDS value that a described TDS value is compensated by the difference of described actual temperature and reference temperature,
And determine that described 2nd TDS value is for final measured value.
The measurement system of TDS value the most according to claim 8, it is characterised in that described calculating mould
Block includes:
Modular converter, for being converted to water quality sampling resistance value by described water quality sampling value；
And, processing module, for calculating under described reference temperature according to described water quality sampling resistance value
Oneth TDS value of described aqueous solution to be measured.
The measurement system of TDS value the most according to claim 9, it is characterised in that described process
Module includes:
Search module, be used for searching pre-stored data storehouse, determine the sampling interval at described water quality sampling value place,
Wherein, described pre-stored data storehouse includes the data of multiple sampling interval-deviation factor-deviation constant, any one
Sampling interval be described sample circuit gather from low paramount multiple known TDS values and in described reference temperature
Measure the multiple measurement sampled values obtained by aqueous solution and corresponding measure TDS value, and according to described sampling
The interval that all measurement sampled values are divided in multiple interval by the slope variation of value-measurement TDS value；
And, calculating sub module, for according to described water quality sampling resistance and described water quality sampling value place
Deviation factor corresponding to sampling interval and deviation constant, calculate described water to be measured under described reference temperature
Oneth TDS value of solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610401968.4A CN105973947B (en) | 2016-06-08 | 2016-06-08 | A kind of measurement method and measuring system of TDS value |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610401968.4A CN105973947B (en) | 2016-06-08 | 2016-06-08 | A kind of measurement method and measuring system of TDS value |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105973947A true CN105973947A (en) | 2016-09-28 |
| CN105973947B CN105973947B (en) | 2018-11-30 |
Family
ID=57010874
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610401968.4A Expired - Fee Related CN105973947B (en) | 2016-06-08 | 2016-06-08 | A kind of measurement method and measuring system of TDS value |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105973947B (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106492352A (en) * | 2016-10-26 | 2017-03-15 | 宁波戴维医疗器械股份有限公司 | A kind of phototherapy apparatus |
| CN108117180A (en) * | 2017-12-29 | 2018-06-05 | 何中义 | A kind of water purifier water system |
| CN109211981A (en) * | 2018-09-05 | 2019-01-15 | 广东点球电子科技有限公司 | The probe calibration method, apparatus and TDS detector of TDS detector |
| CN109655497A (en) * | 2018-11-28 | 2019-04-19 | 厦门芯阳科技股份有限公司 | It is a kind of for correcting the control circuit and method of TDS probe measurement errors |
| CN110044968A (en) * | 2019-05-24 | 2019-07-23 | 武汉慧达电子科技有限公司 | TDS detection method and detection system based on fluid water quality |
| CN110763735A (en) * | 2019-10-18 | 2020-02-07 | 深圳和而泰数据资源与云技术有限公司 | Soluble total solid TDS detection method and related equipment |
| CN110823963A (en) * | 2018-08-09 | 2020-02-21 | 上海朴道水汇环保科技股份有限公司 | TDS detection method and system, and terminal |
| CN112083133A (en) * | 2020-08-18 | 2020-12-15 | 惠州拓邦电气技术有限公司 | Nonlinear water solubility total solid compensation method and detection device |
| CN113671139A (en) * | 2021-08-10 | 2021-11-19 | 杭州智果科技有限公司 | TDS detection system based on fluid water quality |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0299848A (en) * | 1988-10-07 | 1990-04-11 | Hitachi Ltd | Continuous analysis method and apparatus for ion component |
| JP2000111545A (en) * | 1998-10-06 | 2000-04-21 | Meidensha Corp | Preventive method for dew condensation in water- quality measuring apparatus |
| CN202533401U (en) * | 2012-01-30 | 2012-11-14 | 北京银之源科贸有限责任公司 | Total dissolved solids (TDS) test pen |
| CN103675022A (en) * | 2012-09-06 | 2014-03-26 | 珠海格力电器股份有限公司 | TDS (total dissolved solids) detection method, device and system |
| CN204705632U (en) * | 2015-06-19 | 2015-10-14 | 东莞市铱伦实业有限公司 | A kind of TDS with temperature detecting function pops one's head in |
| CN204964436U (en) * | 2015-09-07 | 2016-01-13 | 浙江利尔达物联网技术有限公司 | TDS surveys water -color paintbrush with quick temperature -sensing |
-
2016
- 2016-06-08 CN CN201610401968.4A patent/CN105973947B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0299848A (en) * | 1988-10-07 | 1990-04-11 | Hitachi Ltd | Continuous analysis method and apparatus for ion component |
| JP2000111545A (en) * | 1998-10-06 | 2000-04-21 | Meidensha Corp | Preventive method for dew condensation in water- quality measuring apparatus |
| CN202533401U (en) * | 2012-01-30 | 2012-11-14 | 北京银之源科贸有限责任公司 | Total dissolved solids (TDS) test pen |
| CN103675022A (en) * | 2012-09-06 | 2014-03-26 | 珠海格力电器股份有限公司 | TDS (total dissolved solids) detection method, device and system |
| CN204705632U (en) * | 2015-06-19 | 2015-10-14 | 东莞市铱伦实业有限公司 | A kind of TDS with temperature detecting function pops one's head in |
| CN204964436U (en) * | 2015-09-07 | 2016-01-13 | 浙江利尔达物联网技术有限公司 | TDS surveys water -color paintbrush with quick temperature -sensing |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106492352A (en) * | 2016-10-26 | 2017-03-15 | 宁波戴维医疗器械股份有限公司 | A kind of phototherapy apparatus |
| CN106492352B (en) * | 2016-10-26 | 2019-05-14 | 宁波戴维医疗器械股份有限公司 | A kind of phototherapy apparatus |
| CN108117180B (en) * | 2017-12-29 | 2021-01-01 | 安徽唯雅诺智能净水设备有限公司 | Water supply system of water purifier |
| CN108117180A (en) * | 2017-12-29 | 2018-06-05 | 何中义 | A kind of water purifier water system |
| CN110823963B (en) * | 2018-08-09 | 2022-08-09 | 上海朴道水汇环保科技股份有限公司 | TDS detection method and system, and terminal |
| CN110823963A (en) * | 2018-08-09 | 2020-02-21 | 上海朴道水汇环保科技股份有限公司 | TDS detection method and system, and terminal |
| CN109211981A (en) * | 2018-09-05 | 2019-01-15 | 广东点球电子科技有限公司 | The probe calibration method, apparatus and TDS detector of TDS detector |
| CN109211981B (en) * | 2018-09-05 | 2021-10-26 | 广东点球电子科技有限公司 | Method and device for calibrating probe of TDS detector and TDS detector |
| CN109655497A (en) * | 2018-11-28 | 2019-04-19 | 厦门芯阳科技股份有限公司 | It is a kind of for correcting the control circuit and method of TDS probe measurement errors |
| CN109655497B (en) * | 2018-11-28 | 2021-05-04 | 厦门芯阳科技股份有限公司 | Control circuit and method for correcting TDS probe measurement error |
| CN110044968A (en) * | 2019-05-24 | 2019-07-23 | 武汉慧达电子科技有限公司 | TDS detection method and detection system based on fluid water quality |
| CN110763735A (en) * | 2019-10-18 | 2020-02-07 | 深圳和而泰数据资源与云技术有限公司 | Soluble total solid TDS detection method and related equipment |
| CN110763735B (en) * | 2019-10-18 | 2022-04-29 | 深圳和而泰数据资源与云技术有限公司 | Soluble total solid TDS detection method and related equipment |
| CN112083133A (en) * | 2020-08-18 | 2020-12-15 | 惠州拓邦电气技术有限公司 | Nonlinear water solubility total solid compensation method and detection device |
| CN113671139A (en) * | 2021-08-10 | 2021-11-19 | 杭州智果科技有限公司 | TDS detection system based on fluid water quality |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105973947B (en) | 2018-11-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105973947A (en) | Measuring method and system of TDS values | |
| CA2413976C (en) | Biosensor apparatus and method with sample type and volume detection | |
| CA1239546A (en) | Capacitive gauging method and apparatus | |
| CN103675023B (en) | Detection circuit and detection method of total dissolved solids (TDS) | |
| US7535237B1 (en) | Sensor for measuring moisture and salinity | |
| US7482820B1 (en) | Sensor for measuring moisture and salinity | |
| JP7186787B2 (en) | Apparatus for monitoring fluids | |
| EP0664888A1 (en) | Circuit for measuring source resistance of a sensor | |
| CN103969614B (en) | A kind of calibration steps of digital multimeter | |
| CN105378492A (en) | Apparatus and method for measuring electrical properties of matter | |
| CN107735653A (en) | Liquid level sensor and detection method and Full-automatic picking sampling device | |
| CN107181300A (en) | Charge protector, the method and apparatus for calibrating charging equipment | |
| US10845390B2 (en) | System for measuring the voltage of a busbar | |
| CN202748329U (en) | TDS (total dissolved solids) detection circuit | |
| CN107525563A (en) | A kind of resistance-type level transducer measuring circuit and the measuring circuit self-adapting measuring method | |
| CN111505390A (en) | Novel capacitance measuring instrument | |
| CN101206252A (en) | System and method for measuring digital multimeter | |
| JP4009876B2 (en) | Measuring error correction method and electronic component characteristic measuring apparatus | |
| CN108957174A (en) | A kind of voltage dip detection device and method | |
| CN206114051U (en) | Liquid -level monitoring device | |
| CN205126223U (en) | High stability heart discharge capacity measuring circuit | |
| CN104622594A (en) | System and method for automatically searching circuit characteristic frequency | |
| CN204495909U (en) | Wide-range high-accuracy electrical resistance collection circuit | |
| CN219799707U (en) | Battery internal resistance detection phase discrimination circuit | |
| CN213956515U (en) | High-precision fuel oil quantity measuring circuit with adjustable balance capacitor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181130 |