CN103675022A - TDS (total dissolved solids) detection method, device and system - Google Patents
TDS (total dissolved solids) detection method, device and system Download PDFInfo
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- CN103675022A CN103675022A CN201210328637.4A CN201210328637A CN103675022A CN 103675022 A CN103675022 A CN 103675022A CN 201210328637 A CN201210328637 A CN 201210328637A CN 103675022 A CN103675022 A CN 103675022A
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Abstract
The invention discloses a TDS (total dissolved solids) detection method, device and system. The detection method comprises the following steps: detecting the temperature of water to be detected; acquiring a water quality sampling value of a water quality probe in the water to be detected; determining TDS of the water to be detected according to the temperature and the water quality sampling value of the water to be detected. According to the detection method, the temperature of the water to be detected is used as a condition for determining the TDS in the water, so that the influence of water temperature to the TDS accuracy can be overcome, and the accuracy of the TDS detection for the water quality can be improved.
Description
Technical field
The present invention relates to water treatment field, in particular to a kind of TDS detection method, pick-up unit and detection system.
Background technology
Total dissolved solid (TDS, Total Dissolved Solids) refer to the total amount of the solid being dissolved in the water, measuring unit is parts per millions or mg/Lmilligram/Liter, and physical significance is in 1 premium on currency, to be dissolved with how many milligrams of total dissolved solids.Popular says, TDS value has represented dissolved matter impurity content in water, and TDS value is larger, illustrates that the impurity content in water is large, water quality inferiority, on the contrary impurity content is little, and water quality is good.
At present, water quality TDS detection method obtains water quality sampling value by direct voltage drive water quality probe mostly, then directly according to sampled value-TDS curve, obtains water quality TDS.Yet, through inventor, study discovery, as shown in Figure 1, for identical water quality TDS, when water temperature is different, the water quality TDS arriving by water quality probe in detecting is different, for example, when TDS is 25mg/L, the sampled value obtaining when water temperature is 1 ℃ is 185, and the sampled value that water temperature obtains while being 25 ℃ is less than 175, thereby, when water quality TDS detects, if do not consider the impact of water temperature, the TDS recording is so inaccurate, and then the reliability of the products such as water purifier is caused to great impact.
Problem for water quality TDS detection method poor accuracy in correlation technique, not yet proposes effective solution at present.
Summary of the invention
Fundamental purpose of the present invention is to provide a kind of TDS detection method, pick-up unit and detection system, to solve the problem of water quality TDS detection method poor accuracy.
To achieve these goals, according to an aspect of the present invention, provide a kind of TDS detection method.
TDS detection method according to the present invention comprises: the temperature that detects tested water; Obtain the water quality sampling value of water quality probe in tested water; And the TDS that determines tested water according to the temperature of tested water and water quality sampling value.
Further, the temperature that detects tested water comprises: obtain the temperature sampling value that temperature-sensitive bag detects tested water; And according to default sampled value-water-thermometer, determine the temperature of tested water.
Further, according to the temperature of tested water and water quality sampling value, determine that the TDS of tested water comprises: according to the temperature correction water quality sampling value of tested water; And according to revised sampled value and default sampled value-TDS curve, determine the TDS of tested water.
Further, when default sampled value-TDS curve is the sampled value-TDS curve of water temperature while being the first temperature, according to the temperature correction water quality sampling value of tested water, comprises and adopt following formula correction:
TDS_AD
after correction=TDS_AD
before correction+ (T
water-T
1) % △ T
Wherein, TDS_AD
after correctionfor revised water quality sampling value, TDS_AD
before correctionfor the water quality sampling value getting, T
waterfor the temperature of tested water, T
1be the first temperature, △ T is default compensation temperature.
Further, when the temperature of tested water is less than 20 ℃, according to the temperature correction water quality sampling value of tested water.
Further, when the temperature of tested water is less than preset temperature, T
1=1 ℃, △ T=2; And when the temperature of tested water is more than or equal to preset temperature and is less than 20 ℃, T
1=10 ℃, △ T=2, wherein, preset temperature is less than 20 ℃.
Further, according to the temperature of tested water and water quality sampling value, determine that the TDS of tested water comprises: the temperature of determining tested water in preset temperature range, wherein, default a plurality of temperature ranges; According to definite temperature range, determine the reference temperature corresponding to temperature of tested water, wherein, different reference temperature corresponding to temperature range; And the sampled value-TDS curve during according to water quality sampling value and definite reference temperature, determine the TDS of tested water.
Further, when the temperature of tested water is more than or equal to 20 ℃, the temperature of determining tested water in preset temperature range.
To achieve these goals, according to a further aspect in the invention, provide a kind of TDS pick-up unit.
TDS pick-up unit according to the present invention comprises: detection module, for detection of the temperature of tested water; Acquisition module, for obtaining the water quality sampling value of tested water water quality probe; And determination module, for determine the TDS of tested water according to the temperature of tested water and water quality sampling value.
Further, detection module comprises: obtain submodule, detect the temperature sampling value of tested water for obtaining temperature-sensitive bag; And first determine submodule, for according to default sampled value-water-thermometer, determine the temperature of tested water.
Further, determination module comprises: revise submodule, for according to the temperature correction water quality sampling value of tested water; And second determine submodule, for according to revised sampled value and default sampled value-TDS curve, determine the TDS of tested water.
Further, when default sampled value-TDS curve is the sampled value-TDS curve of water temperature while being the first temperature, revises submodule and adopt following formula correction:
TDS_AD
after correction=TDS_AD
before correction+ (T
water-T
1) % △ T
Wherein, TDS_AD
after correctionfor revised water quality sampling value, TDS_AD
before correctionfor the water quality sampling value getting, T
waterfor the temperature of tested water, T
1be the first temperature, △ T is default compensation temperature.
Further, when correction submodule is also less than 20 ℃ for the temperature when tested water, according to the temperature correction water quality sampling value of tested water.
Further, determination module comprises: the 3rd determines submodule, for the temperature of determining tested water in preset temperature range, wherein, default a plurality of temperature ranges; The 4th determines submodule, for determine the reference temperature corresponding to temperature of tested water according to definite temperature range, wherein, different reference temperature corresponding to temperature range; And the 5th determine submodule, the sampled value-TDS curve when according to water quality sampling value and definite reference temperature, determines the TDS of tested water.
Further, the 3rd determines when submodule is also more than or equal to 20 ℃ for the temperature when tested water, the temperature of determining tested water in preset temperature range.
To achieve these goals, according to an aspect of the present invention, provide a kind of TDS detection system.
TDS detection system according to the present invention comprises: Temperature Detector, for detection of the temperature of tested water; TDS testing circuit, for obtaining the water quality sampling value of tested water water quality probe; And processor, be connected respectively with TDS testing circuit with Temperature Detector, for determine the TDS of tested water according to the temperature of tested water and water quality sampling value.
By the present invention, the TDS detection method that employing comprises the following steps: the temperature that detects tested water, obtain the water quality sampling value of water quality probe in tested water, and according to the temperature of tested water and water quality sampling value, determine the TDS of tested water, using the temperature of tested water as the condition of determining water quality TDS, to overcome the impact of water temperature on TDS accuracy, solved the problem of water quality TDS detection method poor accuracy, and then reached the effect of the TDS detection accuracy of increasing water quality.
Accompanying drawing explanation
The accompanying drawing that forms the application's a part is used to provide a further understanding of the present invention, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the water quality sampling value-TDS curve synoptic diagram under different temperatures;
Fig. 2 is according to the block diagram of the TDS detection system of the embodiment of the present invention;
Fig. 3 is according to the block diagram of the TDS pick-up unit of first embodiment of the invention;
Fig. 4 adopts the pick-up unit of Fig. 3 and the TDS comparison diagram that professional conductivity meter obtains;
Fig. 5 is according to the block diagram of the TDS pick-up unit of second embodiment of the invention;
Fig. 6 adopts the pick-up unit of Fig. 5 and the TDS comparison diagram that professional conductivity meter obtains;
Fig. 7 is according to the process flow diagram of the TDS detection method of first embodiment of the invention;
Fig. 8 is according to the process flow diagram of the TDS detection method of second embodiment of the invention;
Fig. 9 is according to the process flow diagram of the TDS detection method of third embodiment of the invention;
Figure 10 is according to the process flow diagram one of the TDS detection method of fourth embodiment of the invention;
Figure 11 is according to the flowchart 2 of the TDS detection method of fourth embodiment of the invention; And
Figure 12 is according to the flow chart 3 of the TDS detection method of fourth embodiment of the invention.
Embodiment
It should be noted that, in the situation that not conflicting, embodiment and the feature in embodiment in the application can combine mutually.Describe below with reference to the accompanying drawings and in conjunction with the embodiments the present invention in detail.
The embodiment of the TDS detection system that this embodiment of paper provides.
Fig. 2 is according to the block diagram of the TDS detection system of the embodiment of the present invention, and as shown in Figure 2, this TDS detection system comprises Temperature Detector 10, TDS testing circuit 30 and processor 50.
When this test macro is applied to the products such as water purifier, Temperature Detector 10 detects the temperature of tested water in real time, and preferably, Temperature Detector 10 is temperature-sensitive bag, temperature-sensitive bag is arranged to the water tank of water purifier to detect water temperature.When detecting water quality TDS, the syringe needle of water quality probe is placed in to tested water, TDS testing circuit 30 is connected with water quality probe, for obtaining the water quality sampling value of tested water water quality probe.Processor 50 can be the controllers such as single-chip microcomputer, is connected respectively with TDS testing circuit 30 with Temperature Detector 10, determines the TDS of tested water according to the temperature of tested water and water quality sampling value.
The TDS detection system that adopts this embodiment to provide, processor 50 is when determining the TDS of tested water, except obtaining the water quality sampling value of water quality probe, also by Temperature Detector 10, obtain the temperature of tested water, using the temperature of tested water as the condition of determining water quality TDS, can overcome the impact of water temperature on TDS accuracy, improve the accuracy that water quality TDS detects.
The embodiment that introduces the TDS pick-up unit that this embodiment provides below, it should be noted that, the processor 50 shown in Fig. 2 can comprise following any one TDS pick-up unit.
Fig. 3 is according to the block diagram of the TDS pick-up unit of first embodiment of the invention, as shown in Figure 3, this pick-up unit comprises detection module 51, acquisition module 53 and determination module 55, wherein, detection module 51 comprises that obtaining submodule 511 and first determines submodule 513, and determination module 55 comprises that revising submodule 551 and second determines submodule 553.
Detection module 51 detects the temperature of tested water for the value by sampling temperature-sensitive bag, generally, between the value of sampling temperature-sensitive bag and the actual temperature of tested water, there is certain error, it is more accurate for TDS is detected, prestore temperature sampling value-water-thermometer, the submodule 511 that obtains in detection module 51 obtains after the temperature sampling value that temperature-sensitive bag detects tested water, and first determines that submodule 513 determines the temperature of tested water according to default sampled value-water-thermometer.
For example, when the temperature-sensitive bag of single-chip microcomputer sample circuit by 50K carries out the detection of temperature, sampled value-water-thermometer is as shown in table 1 below, when obtaining temperature sampling value that submodule 511 obtains and be 15, first determines that submodule 513 determines that according to default sampled value-water-thermometer the temperature of tested water is 18 ℃.In following table 1, when obtaining corresponding two the actual water temperature values of temperature sampling value that submodule 511 receives, first determines the temperature that the definite maximum water temperature value of submodule 513 is tested water, for example, obtaining the temperature sampling value that submodule 511 obtains is 9 o'clock, and first determines that submodule 513 determines that according to default sampled value-water-thermometer the temperature of tested water is 7 ℃.
Table 1 sampled value-water-thermometer
| Temperature value (℃) | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| |
7 | 7 | 8 | 8 | 8 | 9 | 9 | 10 | 10 | 11 |
| Temperature value (℃) | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 |
| |
11 | 12 | 12 | 13 | 13 | 14 | 14 | 15 | 16 | 16 |
| Temperature value (℃) | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 |
| |
17 | 18 | 19 | 19 | 20 | 21 | 22 | 23 | 24 | 25 |
| Temperature value (℃) | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 |
| AD value | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 36 |
Acquisition module 53 obtains the water quality sampling value of water quality probe in tested water by TDS testing circuit.Determination module 55 is connected respectively with acquisition module 53 with detection module 51, determines the TDS of tested water according to the temperature of tested water and water quality sampling value.
Preferably, when the temperature of tested water is less than 20 ℃, determination module 55 comprises that revising submodule 551 and second determines submodule 553, revise submodule 551 according to the temperature correction water quality sampling value of tested water, so that revised water quality sampling value corresponding water quality sampling value while being approximately equal to certain predetermined temperature, then by second, determine that submodule 553, according to revised sampled value and sampled value-TDS curve corresponding to this predetermined temperature, determines the TDS of tested water.
As shown in Figure 1, while being less than 20 ℃ due to the temperature of tested water, under identical TDS, the water quality sampling value recording during different temperatures differs greatly, and, by revising water quality sampling value, eliminates the impact that temperature is brought.For example, by detect the special-purpose conductivity meter (precision is high, expensive) of water quality TDS detect 2 ℃ at water quality sampling value during different TDS, obtain default sampled value-TDS curve, when the temperature of tested water is 4 ℃, revise submodule 551 and revise the water quality sampling value that acquisition module 53 obtains, so that revised water quality sampling value is approximately equal to the water quality sampling value that conductivity meter detects at 2 ℃, then by this default sampled value-TDS curve, second determines the TDS of submodule 553 definite tested water.
Adopt TDS that the method obtains and sampling adopt model be the TDS Contrast on effect that obtains of the German WTW laboratory conductivity meter of inoLab Cond 730 as shown in Figure 4, wherein, it is 4 ℃ of TDS that conductivity meter obtains that the curve that diamond sign is set shows water temperature, it is the TDS that the pick-up unit of 4 ℃ of these embodiment obtains that the curve that square sign is set shows water temperature, curve ordinate is TDS value, and horizontal ordinate is experiment number.Fig. 4 shows the comparing result of 13 experiments, and data as shown in Figure 4 can obtain, and while adopting pick-up unit that this embodiment provides to detect water quality TDS, accuracy approaches professional conductivity meter substantially, has higher precision.
Fig. 5 is according to the block diagram of the TDS pick-up unit of second embodiment of the invention, as shown in Figure 5, this pick-up unit comprises detection module 51, acquisition module 53 and determination module 55, wherein, detection module 51 comprises that obtaining submodule 511 and first determines submodule 513, and determination module 55 comprises that the 3rd determines submodule 555, the 4th definite submodule 557 and the 5th definite submodule 559.
Detection module 51 in this embodiment is identical with the detection module 51 shown in Fig. 3, is above described in detail, and this place repeats no more.
Acquisition module 53 obtains the water quality sampling value of water quality probe in tested water by TDS testing circuit.Determination module 55 is connected respectively with acquisition module 53 with detection module 51, determines the TDS of tested water according to the temperature of tested water and water quality sampling value.
Preferably, when the temperature of tested water is more than or equal to 20 ℃, determination module 55 comprises that the 3rd determines submodule 555, the 4th determines submodule 557 and the 5th definite submodule 559, default a plurality of temperature ranges, the reference temperature that different temperatures scope is corresponding different, sampled value-TDS curve while prestoring each reference temperature, the 3rd temperature of determining submodule 555 definite tested water is in which temperature range, the 4th definite submodule 557 is determined the reference temperature corresponding to temperature of tested water according to definite temperature range, the last the 5th determines that submodule 559 is according to sampled value-TDS curve of water quality sampling value and definite reference temperature, determine the TDS of tested water.
As shown in Figure 1, while being more than or equal to 20 ℃ due to the temperature of tested water, under identical TDS, the water quality sampling value difference recording during different temperatures is different less, water quality sampling value while adopting close temperature replaces the actual water quality sampling value of obtaining to determine the TDS of tested water, and method is simple and little on the accuracy impact of TDS.For example, certain default temperature range is 27 ℃ ~ 31 ℃, reference temperature corresponding to this temperature range is 29 ℃, by detecting the special-purpose conductivity meter of water quality TDS, (precision is high, expensive) detect 29 ℃ at water quality sampling value during different TDS, obtain default sampled value-TDS curve, when the temperature of tested water is 28 ℃, the 3rd determines that the definite water temperature of submodule 555 is in 27 ℃ ~ 31 ℃, the 4th determines that submodule 557 is according to determining that reference temperature is 29 ℃, the last the 5th determines submodule 559 according to water quality sampling value and is sampled value-TDS curve of 29 ℃, determine the TDS of tested water.
Adopt TDS that the method obtains and sampling adopt model be the TDS Contrast on effect that obtains of the German WTW laboratory conductivity meter of inoLab Cond 730 as shown in Figure 6, wherein, it is 28 ℃ of TDS that conductivity meter obtains that the curve that diamond sign is set shows water temperature, it is the TDS that the pick-up unit of 28 ℃ of these embodiment obtains that the curve that square sign is set shows water temperature, curve ordinate is TDS value, and horizontal ordinate is experiment number.Fig. 6 shows the comparing result of 19 experiments, and data as shown in Figure 4 can obtain, and while adopting pick-up unit that this embodiment provides to detect water quality TDS, accuracy approaches professional conductivity meter substantially, has higher precision.
The embodiment of the present invention also provides TDS Check processing method, below TDS detection method that the embodiment of the present invention is provided be introduced.It should be noted that, the TDS pick-up unit that can provide by the embodiment of the present invention in the TDS of embodiment of the present invention detection method is carried out, the TDS detection method that the TDS pick-up unit of the embodiment of the present invention also can provide for carrying out the embodiment of the present invention.
Fig. 7 is according to the process flow diagram of the TDS detection method of first embodiment of the invention, and as shown in Figure 7, the method comprises that following step S102 is to step S106.
Step S102: detect the temperature of tested water, when this method of testing is applied to the products such as water purifier, can detect in real time the temperature of tested water by Temperature Detector, this step can realize by Fig. 3 or detection module embodiment illustrated in fig. 5.
Step S104: the water quality sampling value of obtaining water quality probe in tested water, when detecting water quality TDS, the syringe needle of water quality probe is placed in to tested water, can be connected with water quality probe by TDS testing circuit, to obtain water quality sampling value, this step can realize by Fig. 3 or acquisition module embodiment illustrated in fig. 5.
Step S106: determine the TDS of tested water according to the temperature of tested water and water quality sampling value, this step can realize by Fig. 3 or determination module embodiment illustrated in fig. 5.
The TDS detection method that adopts this embodiment to provide, when determining the TDS of tested water, except obtaining the water quality sampling value of water quality probe, also obtain the temperature of tested water, using the temperature of tested water as the condition of determining water quality TDS, can overcome the impact of water temperature on TDS accuracy, improve the accuracy that water quality TDS detects.
Fig. 8 is according to the process flow diagram of the TDS detection method of second embodiment of the invention, and as shown in Figure 8, the method comprises that following step S202 is to step S206.
Step S202: obtain the temperature sampling value that temperature-sensitive bag detects tested water, and according to default sampled value-water-thermometer, determine the temperature of tested water, generally, between the value of sampling temperature-sensitive bag and the actual temperature of tested water, there is certain error, more accurate for TDS is detected, prestore temperature sampling value-water-thermometer, according to this, show the accuracy that guarantees that water temperature detects.
Step S204: obtain the water quality sampling value of water quality probe in tested water, and according to the temperature correction water quality sampling value of tested water.
Step S206: according to revised sampled value and default sampled value-TDS curve, determine the TDS of tested water.
Adopt this embodiment, by revising the mode of water quality sampling value, eliminate the impact that temperature is brought, the accuracy that the TDS that can increase water quality detects.
Preferably, when the temperature of tested water is less than 20 ℃, execution step S204, so that revised water quality sampling value corresponding water quality sampling value while being approximately equal to certain predetermined temperature, then perform step S206, according to revised sampled value and sampled value-TDS curve corresponding to this predetermined temperature, determine the TDS of tested water.
Adopt the preferred embodiment, while being less than 20 ℃ due to the temperature of tested water, under identical TDS, the water quality sampling value recording during different temperatures differs greatly, and the method shown in sample graph 8 when the temperature of tested water is less than 20 ℃ detects water quality TDS more accurate.
Further preferably, this predetermined temperature is the first temperature T
1, default sampled value-TDS curve is T
1time sampled value-TDS curve, according to the temperature correction water quality sampling value of tested water, comprise and adopt following formula correction:
TDS_AD
after correction=TDS_AD
before correction+ (T
water-T
1) % △ T
Wherein, TDS_AD
after correctionfor revised water quality sampling value, TDS_AD
before correctionfor the water quality sampling value getting, T
waterfor the temperature of tested water, △ T is default compensation temperature.
Fig. 9 is according to the process flow diagram of the TDS detection method of third embodiment of the invention, and as shown in Figure 9, the method comprises that following step S302 is to step S308.
Step S302: obtain the temperature sampling value that temperature-sensitive bag detects tested water, and according to default sampled value-water-thermometer, determine the temperature of tested water.
Step S304: the temperature of determining tested water in preset temperature range.
Step S306: reference temperature corresponding to temperature of determining tested water according to definite temperature range.
Step S308: obtain the water quality sampling value of water quality probe in tested water, and the sampled value-TDS curve during according to water quality sampling value and definite reference temperature, determine the TDS of tested water.
Default a plurality of temperature ranges, the reference temperature that different temperatures scope is corresponding different, sampled value-TDS curve while prestoring each reference temperature, by step S304, determine the temperature of tested water is in which temperature range, by step S306, determine the reference temperature corresponding to temperature of tested water, finally by step S308, determine the TDS of tested water.
Adopt this embodiment, the mode that substitutes the water quality sampling value detecting by the water quality sampling value with close temperature is determined water quality TDS, and algorithm is simple.
Preferably, when the temperature of tested water is more than or equal to 20 ℃, S304 is to step S308 for execution step.While being more than or equal to 20 ℃ due to the temperature of tested water, under identical TDS, the water quality sampling value difference recording during different temperatures is different less, adopts the method shown in Fig. 9 to detect water quality TDS when the temperature of tested water is more than or equal to 20 ℃, not only algorithm is simple, does not affect the accuracy that TDS detects.
Figure 10 is according to the process flow diagram of the TDS detection method of fourth embodiment of the invention, as shown in figure 10, the method is according to environment temperature, temperature is divided into two large intervals, after detection water temperature disease gets water quality sampling value, advanced trip temperature judgement, when temperature is lower, serviceability temperature penalty method is carried out the calculating of water quality TDS value, when temperature is higher, uses near relative method and carry out the calculating of water quality TDS value, by the method, the precision and stability that the TDS value of increasing water quality detects.
As can be seen from Figure 1, between each curve corresponding to different these temperature, there is no overlapping AD value (except the TDS situation that is 0), wherein, in the situation that water temperature is less than 20 ℃, the AD value that identical TDS value samples when different temperatures differs larger, so serviceability temperature penalty method is carried out the calculating of water quality TDS value; In the situation that water temperature is greater than 20 ℃, the AD value sampling during identical TDS value different temperatures differs smaller, therefore with carrying out the calculating of water quality TDS value near relative method.
Wherein, the process flow diagram of temperature compensation act as shown in figure 11, by water temperature T
waterbe that 20 ℃ of following temperature are divided into two intervals and calculate, two different temperature points are designated as T1, T2(T1, T2 and all belong to natural number), T1<T2<20 ℃ wherein, wherein T2 infinite approach is 20 ℃, when if current water temperature is less than T1, carry out after temperature compensation, take the curve TDS value final as benchmark calculates of 1 ℃; When if current water temperature is less than T2 but is more than or equal to T1, carry out take after temperature compensation the curve TDS value final as benchmark calculates of 10 ℃.
Temperature compensation act is specifically carried out flow process: work as water temperature T
waterduring <T1, calculate A=(T
water-1) %2, revises TDS_AD to water quality sampling value
after correction=TDS_AD
before correction+ A, then take the curve TDS value final as benchmark calculates of 1 ℃; As water temperature T 1=<T
waterduring <=T2, calculate B=(T
water-10) %2, revises TDS_AD to water quality sampling value
after correction=TDS_AD
before correction+ B, then take the curve TDS value final as benchmark calculates of 10 ℃.
Particularly, when temperature is less than T1,2 ℃ of the every risings of temperature add 1 on the basis of the AD value detecting, and if assumed temperature is 3 ℃, AD value adds 1, and temperature is 5 ℃, and AD value adds 2, and temperature is 7 ℃, and AD value adds 3, and temperature is 9 ℃, and AD value adds 4, and the rest may be inferred; In temperature, be less than T2 ℃ but while being more than or equal to T1 ℃, 2 ℃ of every risings of temperature just add 1 on the basis of the AD value detecting, and if assumed temperature is 12 ℃, AD value adds 1, temperature is 14 ℃, and AD value adds 2, and temperature is 16 ℃, and AD value adds 3, temperature is 18 ℃, and AD value adds 4, and the rest may be inferred.
Wherein, TDS_AD
after correctionfor revised water quality sampling value, TDS_AD
before correctionfor the water quality sampling value getting, T
waterfor the temperature of tested water, △ T is default compensation temperature.
For example, if the temperature AD detecting is 9, water quality AD is 185.Looking into the known present water temperature of table 1 is 7 ℃, so the AD value of water quality need to add 3 and become 188, then compares with the data of 1 ℃, draws final TDS value.
Wherein, near the process flow diagram of relative method as shown in figure 12, water temperature is 20 ℃ above time, by close relative method, calculate, and be mainly by C.T. value, then look for hithermost known temperature point to draw TDS value.Default four temperature ranges: 20 ℃ ~ T001, T001 ~ T002, T002 ~ T003, T003 ~ T004, and T01, T02, T03, T04 are set to respectively to the reference temperature (20 ℃=<T01<T001<T02LEss T.LTssT.LTT002<T03<T003LEssT.L TssT.LTT04) in each temperature range, the sampled value-TDS value curve under the T01 now recording, T02, T03, T04.
Near relative method, specifically carrying out flow process is: as 20 ℃ of <=T
waterduring <=T001, according to the curve of T01, obtain water quality TDS value, work as T001<T
waterduring <=T002, according to the curve of T02, obtain water quality TDS value, work as T002<T
waterduring <=T003, according to the curve of T03, obtain water quality TDS value, work as T003<T
waterduring <=T004, according to the curve of T04, obtain water quality TDS value.
For example, if the temperature AD detecting is 23, water quality AD is 168.Looking into the known present water temperature of table 1 is 28 ℃, supposes that this water temperature (28 ℃) drops on the 3rd interval, at T002 between T003, with the measured value of this known reference line of T03, directly calculate final water quality TDS value.
As can be seen from the above description, the present invention has realized following technique effect: using the temperature of tested water as the condition of determining water quality TDS, to overcome the impact of water temperature on TDS accuracy, improved the accuracy that water quality TDS detects.
It should be noted that, in the step shown in the process flow diagram of accompanying drawing, can in the computer system such as one group of computer executable instructions, carry out, and, although there is shown logical order in flow process, but in some cases, can carry out shown or described step with the order being different from herein.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on the network that a plurality of calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in memory storage and be carried out by calculation element, or they are made into respectively to each integrated circuit modules, or a plurality of modules in them or step are made into single integrated circuit module to be realized.Like this, the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (16)
1. a TDS detection method, is characterized in that, comprising:
Detect the temperature of tested water;
Obtain the water quality sampling value of water quality probe in described tested water; And
According to the temperature of described tested water and described water quality sampling value, determine the TDS of described tested water.
2. TDS detection method according to claim 1, is characterized in that, the temperature that detects tested water comprises:
Obtain the temperature sampling value that temperature-sensitive bag detects described tested water; And
According to default sampled value-water-thermometer, determine the temperature of described tested water.
3. TDS detection method according to claim 1, is characterized in that, according to the temperature of described tested water and described water quality sampling value, determines that the TDS of described tested water comprises:
According to water quality sampling value described in the temperature correction of described tested water; And
According to revised sampled value and default sampled value-TDS curve, determine the TDS of described tested water.
4. TDS detection method according to claim 3, it is characterized in that, when described default sampled value-TDS curve is the sampled value-TDS curve of water temperature while being the first temperature, according to water quality sampling value described in the temperature correction of described tested water, comprises and adopt following formula correction:
TDS_AD
after correction=TDS_AD
before correction+ (T
water-T
1) % △ T
Wherein, TDS_AD
after correctionfor revised water quality sampling value, TDS_AD
before correctionfor the described water quality sampling value getting, T
waterfor the temperature of described tested water, T
1for described the first temperature, △ T is default compensation temperature.
5. TDS detection method according to claim 4, is characterized in that, when the temperature of described tested water is less than 20 ℃, according to water quality sampling value described in the temperature correction of described tested water.
6. TDS detection method according to claim 5, is characterized in that,
When the temperature of described tested water is less than preset temperature, T
1=1 ℃, △ T=2; And
When the temperature of described tested water is more than or equal to described preset temperature and is less than 20 ℃, T
1=10 ℃, △ T=2, wherein, described preset temperature is less than 20 ℃.
7. TDS detection method according to claim 1, is characterized in that, according to the temperature of described tested water and described water quality sampling value, determines that the TDS of described tested water comprises:
The temperature of determining described tested water in preset temperature range, wherein, default a plurality of temperature ranges;
According to definite temperature range, determine the reference temperature corresponding to temperature of described tested water, wherein, different reference temperature corresponding to temperature range; And
Sampled value-TDS curve during according to described water quality sampling value and definite reference temperature, determines the TDS of described tested water.
8. TDS detection method according to claim 7, is characterized in that, when the temperature of described tested water is more than or equal to 20 ℃, the temperature of determining described tested water in preset temperature range.
9. a TDS pick-up unit, is characterized in that, comprising:
Detection module, for detection of the temperature of tested water;
Acquisition module, for obtaining the water quality sampling value of described tested water water quality probe; And
Determination module, for determining the TDS of described tested water according to the temperature of described tested water and described water quality sampling value.
10. TDS pick-up unit according to claim 9, is characterized in that, described detection module comprises:
Obtain submodule, for obtaining temperature-sensitive bag, detect the temperature sampling value of described tested water; And
First determines submodule, for according to default sampled value-water-thermometer, determines the temperature of described tested water.
11. TDS pick-up units according to claim 9, is characterized in that, described determination module comprises:
Revise submodule, for according to water quality sampling value described in the temperature correction of described tested water; And
Second determines submodule, for according to revised sampled value and default sampled value-TDS curve, determines the TDS of described tested water.
12. TDS pick-up units according to claim 11, is characterized in that, when described default sampled value-TDS curve is the sampled value-TDS curve of water temperature while being the first temperature, described correction submodule adopts following formula correction:
TDS_AD
after correction=TDS_AD
before correction+ (T
water-T
1) % △ T
Wherein, TDS_AD
after correctionfor revised water quality sampling value, TDS_AD
before correctionfor the described water quality sampling value getting, T
waterfor the temperature of described tested water, T
1for described the first temperature, △ T is default compensation temperature.
13. TDS pick-up units according to claim 12, is characterized in that, when described correction submodule is also less than 20 ℃ for the temperature when described tested water, according to water quality sampling value described in the temperature correction of described tested water.
14. TDS pick-up units according to claim 9, is characterized in that, described determination module comprises:
The 3rd determines submodule, for the temperature of determining described tested water in preset temperature range, wherein, default a plurality of temperature ranges;
The 4th determines submodule, for determine the reference temperature corresponding to temperature of described tested water according to definite temperature range, wherein, different reference temperature corresponding to temperature range; And
The 5th determines submodule, and the sampled value-TDS curve when according to described water quality sampling value and definite reference temperature is determined the TDS of described tested water.
15. TDS pick-up units according to claim 14, is characterized in that, the described the 3rd determines when submodule is also more than or equal to 20 ℃ for the temperature when described tested water, the temperature of determining described tested water in preset temperature range.
16. 1 kinds of TDS detection systems, is characterized in that, comprising:
Temperature Detector, for detection of the temperature of tested water;
TDS testing circuit, for obtaining the water quality sampling value of described tested water water quality probe; And
Processor, is connected respectively with described TDS testing circuit with described Temperature Detector, for determine the TDS of described tested water according to the temperature of described tested water and described water quality sampling value.
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| CN107581901A (en) * | 2017-10-18 | 2018-01-16 | 上海浩泽康福特环境科技有限公司 | A kind of intelligent constant-temperature hot-water bottle with TDS and temperature detecting function |
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| 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 |
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