CN115248195A - Solution concentration detection method, device, equipment and storage medium - Google Patents
Solution concentration detection method, device, equipment and storage medium Download PDFInfo
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- CN115248195A CN115248195A CN202210839744.7A CN202210839744A CN115248195A CN 115248195 A CN115248195 A CN 115248195A CN 202210839744 A CN202210839744 A CN 202210839744A CN 115248195 A CN115248195 A CN 115248195A
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/41—Refractivity; Phase-affecting properties, e.g. optical path length
- G01N21/43—Refractivity; Phase-affecting properties, e.g. optical path length by measuring critical angle
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- G—PHYSICS
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- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/22—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring angles or tapers; for testing the alignment of axes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/41—Refractivity; Phase-affecting properties, e.g. optical path length
- G01N21/43—Refractivity; Phase-affecting properties, e.g. optical path length by measuring critical angle
- G01N2021/434—Dipping block in contact with sample, e.g. prism
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Abstract
The invention discloses a method, a device, equipment and a storage medium for detecting solution concentration, wherein the solution concentration detection equipment comprises: an angle gauge; the solution concentration detection method comprises the following steps: the method comprises the steps of obtaining the emergent angle of detection light penetrating through a solution to be detected through an angle meter, determining the refractive index of the solution to be detected according to the emergent angle, and determining the solution concentration of the solution to be detected according to the refractive index. According to the grazing incidence principle, the emergent angle of the detection light passing through the solution to be detected is accurately obtained through the angle meter, the refractive index is determined through the emergent angle, and the concentration is determined through the refractive index; in addition, the method utilizes the angle meter to obtain the emergent angle without observing and measuring by human eyes, and the method ensures that the solution concentration detection method has simple principle, convenient, fast and accurate measurement and low cost.
Description
Technical Field
The invention relates to the technical field of solution detection, in particular to a method, a device, equipment and a storage medium for detecting solution concentration.
Background
Because the solution concentration detection is widely applied to the aspects of medicine, biology, industrial production and the like, the solution concentration detection methods are various, the ultraviolet spectrum technology is used for measuring the solution concentration, but the measurement cost is high, and the mass production is difficult to realize; other methods for measuring the concentration of the solution based on an electronic technology exist, but the measurement is influenced by various environmental factors, so that the precision is low; some of them are measured by simple devices such as a saccharimeter and a densitometer, but the types of solutions that can be measured are too small and the accuracy is relatively low. Therefore, how to make the solution concentration detection technology simple and convenient and have high accuracy becomes a big problem.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
Disclosure of Invention
The invention mainly aims to provide a method, a device, equipment and a storage medium for detecting solution concentration, and aims to solve the technical problems that the solution concentration detection technology in the prior art cannot be realized, the principle is simple, the measurement is convenient, fast and accurate, and the cost is low.
In order to achieve the above object, the present invention provides a solution concentration detection method applied to a solution concentration detection apparatus including: an angle gauge;
the solution concentration detection method comprises the following steps:
acquiring an emergent angle of the detection light passing through the solution to be detected through the angle instrument;
determining the refractive index of the solution to be detected according to the emergent angle;
and determining the solution concentration of the solution to be detected according to the refractive index.
Optionally, the solution concentration detection apparatus further comprises: a triangular prism;
the step of determining the refractive index of the solution to be detected according to the emergent angle comprises the following steps:
obtaining the refractive index of the triangular prism and the critical refractive index of the solution to be detected;
and determining the refractive index of the solution to be detected according to the refractive index of the triangular prism, the critical refractive index and the emergent angle.
Optionally, before the step of obtaining the refractive index of the triangular prism and the critical refractive index of the solution to be measured, the method further includes:
acquiring a reference refractive index of the solution to be detected and a vertex angle of the triangular prism;
and determining the critical refractive index of the solution to be detected according to the reference refractive index of the solution to be detected and the angle of the vertex angle of the triangular prism.
Optionally, the step of determining the refractive index of the solution to be measured according to the refractive index of the triangular prism, the critical refractive index, and the exit angle includes:
when the refractive index of the triangular prism is smaller than the critical refractive index, determining the refractive index of the solution to be detected through a preset first refraction model according to the refractive index of the triangular prism, the critical refractive index and the emergent angle;
when the refractive index of the triangular prism is larger than the critical refractive index, determining the refractive index of the solution to be detected through a preset second refraction model according to the refractive index of the triangular prism, the critical refractive index and the emergent angle
Optionally, the preset first refraction model is:
in the formula, eta is the refractive index of the solution to be measured, eta 0 The refractive index of the triangular prism, alpha is the exit angle,a is the angle of the vertex angle of the triangular prism.
Optionally, the preset second refraction model is:
in the formula, eta is the refractive index of the solution to be measured, eta 0 The refractive index of the triangular prism, alpha is an emergent angle, and A is an apex angle of the triangular prism.
Optionally, the solution concentration detection apparatus further comprises: a high-precision temperature control module;
before the step of obtaining the emergent angle of the detection light passing through the solution to be detected by the angle instrument, the method further comprises the following steps:
acquiring the current temperature of the solution to be tested through the high-precision temperature control module, and adjusting the current temperature to enable the solution to be tested to be in a standard test state;
correspondingly, the step of obtaining the emergent angle of the detection light passing through the solution to be detected through the angle meter comprises the following steps:
and when the solution to be tested is in a standard test state, acquiring an emergent angle through the angle instrument.
In addition, in order to achieve the above object, the present invention also provides a solution concentration detecting apparatus, including:
the angle acquisition module is used for acquiring the emergent angle of the detection light passing through the solution to be detected through the angle meter;
the refractive index determining module is used for determining the refractive index of the solution to be detected according to the emergent angle;
and the concentration determination module is used for determining the solution concentration of the solution to be detected according to the refractive index.
Further, in order to achieve the above object, the present invention also provides a solution concentration detection apparatus, including: a memory, a processor, and a solution concentration detection program stored on the memory and executable on the processor, the solution concentration detection program configured to implement the steps of the solution concentration detection method as described above.
Further, in order to achieve the above object, the present invention also proposes a storage medium having stored thereon a solution concentration detection program which, when executed by a processor, realizes the steps of the solution concentration detection method as described above.
According to the grazing incidence principle, the emergent angle of the detection light passing through the solution to be detected is accurately obtained through the angle meter, the refractive index is determined through the emergent angle, and the concentration is determined through the refractive index; in addition, the method utilizes the angle meter to obtain the emergent angle without observing and measuring by human eyes, and the method ensures that the solution concentration detection method has simple principle, convenient, fast and accurate measurement and low cost.
Drawings
Fig. 1 is a schematic structural diagram of a solution concentration detection apparatus in a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of a solution concentration detection method according to a first embodiment of the present invention;
FIG. 3 is a structural diagram of a core device of the solution concentration detection apparatus according to the present invention;
FIG. 4 is a connection diagram of the core components of the solution concentration detection apparatus after the tank is sealed;
FIG. 5 is a schematic flow chart of a solution concentration detection method according to a second embodiment of the present invention;
FIG. 6 is a light path diagram of the detecting light passing through the solution to be detected when the refractive index of the prism is equal to the critical refractive index;
FIG. 7 is a light path diagram of the detecting light passing through the solution to be detected when the refractive index of the prism is smaller than the critical refractive index;
FIG. 8 is a light path diagram of the detection light passing through the solution to be detected when the refractive index of the prism is greater than the critical refractive index;
FIG. 9 is a graph showing the relationship between the concentrations of glucose solution and the exit angle when the refractive index of the prism is smaller than the critical refractive index;
FIG. 10 is a graph showing the relationship between the concentration of glucose solution and the exit angle when the refractive index of the prism is greater than the critical refractive index;
FIG. 11 is a schematic flow chart of a solution concentration detecting method according to a third embodiment of the present invention;
fig. 12 is a block diagram showing the structure of the solution concentration detection apparatus according to the first embodiment of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 1 | |
2 | |
| 3 | |
4 | Two-section |
| 5 | Base seat | 6 | Angle instrument |
| a | Length of angle gauge | b | Width of angle gauge |
| c | Width of guide rail | d | Thickness of base |
| e | Thickness of plate glass | L | Length of |
| 11 | |
12 | AC- |
| 13 | |
14 | |
| 15 | |
16 | High-precision |
| 17 | |
18 | |
| 19 | Liquid |
20 | |
| 21 | Linear laser source |
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a solution concentration detection apparatus in a hardware operating environment according to an embodiment of the present invention.
As shown in fig. 1, the solution concentration detecting apparatus may include: a processor 1001, such as a Central Processing Unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may include a Display (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a Wireless interface (e.g., a Wireless-Fidelity (Wi-Fi) interface). The Memory 1005 may be a Random Access Memory (RAM) or a Non-Volatile Memory (NVM), such as a disk Memory. The memory 1005 may alternatively be a storage device separate from the processor 1001.
Those skilled in the art will appreciate that the configuration shown in fig. 1 does not constitute a limitation of the solution concentration detection apparatus, and may include more or less components than those shown, or some components in combination, or a different arrangement of components.
As shown in fig. 1, a memory 1005, which is a storage medium, may include therein an operating system, a network communication module, a user interface module, and a solution concentration detection program.
In the solution concentration detection apparatus shown in fig. 1, the network interface 1004 is mainly used for data communication with a network server; the user interface 1003 is mainly used for data interaction with a user; the processor 1001 and the memory 1005 of the solution concentration detection apparatus of the present invention may be provided in the solution concentration detection apparatus that calls the solution concentration detection program stored in the memory 1005 and executes the solution concentration detection method provided by the embodiment of the present invention by the processor 1001.
An embodiment of the present invention provides a method for detecting a solution concentration, and referring to fig. 2, fig. 2 is a schematic flow chart of a first embodiment of the method for detecting a solution concentration according to the present invention.
In this embodiment, the solution concentration detection method includes the following steps:
step S10: and acquiring the emergent angle of the detection light passing through the solution to be detected through the angle instrument.
It can be understood that the execution main body of the embodiment can be a solution concentration detection device, which is designed according to the principle of grazing incidence method, and comprises a triangular prism, a rotatable triangular plate glass, an angle instrument and the like, and the outgoing angle is automatically acquired through the angle instrument, so that the experimental accuracy is higher.
For convenience of understanding, the description is made with reference to fig. 3, but the present solution is not limited to this scheme, fig. 3 is a structure diagram of a core device of the solution concentration detection apparatus, when a detection experiment starts, a small amount of liquid is sandwiched between a triangular plate glass 2 with a frosted glass surface and one side surface of a triple prism 1, after the frosted glass surface of the plate glass 2 is coated with the liquid to be detected and closed, the width of a gap between the frosted glass surface and the side surface of the triple prism 1 is not more than 2mm, the liquid between the gaps forms a solution film to be detected, so that incident light vertically enters the solution film to be detected, a bright-dark boundary appears in an emergent view field, and the refractive index can be solved according to an emergent angle, and then the solution concentration can be solved.
It should be noted that the angle meter may be a precise angle measuring instrument, referring to fig. 3, the angle meter 6 is installed on two parallel guide rails 4 under the triangular prism 1, when in use, the angle meter 6 needs to be initialized, that is, the value of the angle meter 6 is set to 0, and the top end of the angle meter 6 is parallel to the linear light source under the triangular prism.
It should be understood that the solution to be tested can be any homogeneous, stable, transparent mixture, e.g., various salt solutions, glucose solutions, etc.
In the specific implementation, the exit angle of the detection light passing through the solution to be detected is obtained through the angle meter, the rotating shaft of the angle meter can be rotated, the determining button is pressed after the plane of the angle meter is parallel to the exit light, the exit angle of the equivalent parallel light is led into a corresponding algorithm program of the main control chip through the angle meter by using a digital signal with characteristic data to be processed, and the processed exit angle is displayed on the display screen.
For convenience of understanding, the description is made with reference to fig. 4, but the present solution is not limited thereto, and fig. 4 is a specific structure diagram of the solution concentration detection device after the box sealing, when the detection experiment starts, the commercial power 11 is turned on, the line laser source 21 starts to operate, the commercial power 11 converts 220V AC commercial power into 5V DC power through the AC-DC power module 12, the line laser source 21 generates a bright-dark boundary through the transparent liquid film to be detected of the triangular prism 14, the line laser source 21 is adjusted to make the output light fall within the test range of the angle meter 15, the angle meter 15 is turned on, the outgoing base point is determined, the angle meter plane is manually adjusted to be parallel to the outgoing light, the outgoing angle of the detection light passing through the solution to be detected is automatically measured, the outgoing angle is transmitted to the main control chip 13 to be processed, and then the processed and output to the display screen 19 for displaying.
Step S20: and determining the refractive index of the solution to be detected according to the emergent angle.
It should be noted that the refractive index of the solution to be measured is determined according to the exit angle, which may be directly calculated according to the law of refraction, or determined according to a mapping relationship between the exit angle and the refractive index of the solution to be measured, or determined by searching a table between the exit angle and the refractive index of the solution to be measured, which is not limited in this embodiment.
Step S30: and determining the solution concentration of the solution to be detected according to the refractive index.
It should be noted that, the solution concentration of the solution to be measured is determined according to the refractive index, which may be determined according to a linear relationship between the refractive index and the concentration of the solution, or may be determined according to an empirical formula between the refractive index and the concentration of the solution, and this embodiment does not limit this.
Further, in order to enable the solution concentration detection device to detect the concentrations of a plurality of different solutions, empirical formulas of the concentrations and the refractive indexes of the solutions with different concentrations may be configured in advance, and the empirical formulas may be preset and introduced into the solution concentration detection program. Referring to fig. 4, when the solution concentration detection apparatus is used, the type of the solution to be detected is selected by the mode selection module 17, the data of the type of the solution is transmitted to the main control chip 13, and the empirical formula of the concentration and the refractive index corresponding to the type of the solution is selected, and is introduced into the solution concentration detection program programmed in advance for calculation. For example, the empirical formula of the relationship between the concentration of the glucose solution and the refractive index at 25 ℃ is η = pc + q, wherein the undetermined coefficients p =0.0013333 and q =1.3265 (the values of the undetermined coefficients a and B are both obtained by experimental linear fitting), and the solution concentration c can be determined by the formula by substituting the refractive index η of the solution to be measured.
According to the grazing incidence principle, the emergent angle of the detection light passing through the solution to be detected is accurately obtained through the angle meter, the refractive index is determined through the emergent angle, and the concentration is determined through the refractive index; in addition, the method utilizes the angle meter to obtain the emergent angle without observing and measuring by human eyes, and the method ensures that the solution concentration detection method has simple principle, convenient, fast and accurate measurement and low cost.
Referring to fig. 5, fig. 5 is a schematic flow chart of a solution concentration detection method according to a second embodiment of the present invention.
In the second embodiment, the step S20 includes:
step S201; and acquiring the refractive index of the triangular prism and the critical refractive index of the solution to be detected.
It should be noted that the refractive index of the triangular prism may be determined according to the material of the triangular prism, and the obtained refractive index of the triangular prism may be obtained from a local storage by obtaining a preset value of the refractive index of the triangular prism, or may be measured in real time by an abbe refractometer, which is not limited in this embodiment.
For ease of understanding, the description will be made with reference to fig. 6, but this scheme is not limited thereto. Fig. 6 is a light path diagram of the solution to be measured through which the detection light passes when the refractive index of the prism is equal to the critical refractive index, the critical refractive index of the solution to be measured may be measured and calculated when the emergent light is emitted perpendicular to the bottom surface of the prism, referring to fig. 6, the emergent angle is 0 ° at this time, and obtaining the critical refractive index of the solution to be measured may be directly calling the critical refractive index data of the solution to be measured in the local storage, or may be obtained by real-time measurement, which is not limited in this embodiment.
Further, in order to avoid an error caused by an inaccurate value of the critical refractive index to an experiment, before the step of obtaining the refractive index of the triangular prism and the critical refractive index of the solution to be measured, the method further includes:
acquiring a reference refractive index of the solution to be detected and a vertex angle of the triangular prism;
and determining the critical refractive index of the solution to be detected according to the reference refractive index of the solution to be detected and the angle of the vertex angle of the triangular prism.
It should be understood that the reference refractive index of the solution to be measured can be obtained by selecting a solution to be measured with a known reference refractive index, or can be measured in real time by an abbe refractometer. For example, a 3% standard concentration glucose solution has a reference refractive index of 1.3315.
It should be noted that the angle of the apex of the triangular prism may be obtained by presetting data stored in the solution concentration detection program, and the angle of the apex of the commonly used triangular prism is 60 °.
In a specific implementation, the critical refractive index of the solution to be measured is determined according to the reference refractive index of the solution to be measured and the vertex angle of the triangular prism, and the critical refractive index of the solution to be measured can be obtained through a critical refractive index calculation model or a calculation formula. The formula for determining the critical refractive index of the solution to be measured according to the reference refractive index of the triangular prism and the angle of the vertex angle of the triangular prism can be expressed as follows:
in the formula eta L Is the critical refractive index, eta, of the solution to be measured c And A is the reference refractive index of the solution to be detected, and A is the angle of the vertex angle of the triangular prism. For example, a 3% standard glucose solution is selected with a reference refractive index η c =1.3315, the critical refractive index of the prism
Step S202: and determining the refractive index of the solution to be detected according to the refractive index of the triangular prism, the critical refractive index and the emergent angle.
In a specific implementation, the refractive index of the solution to be measured is determined according to the refractive index, the critical refractive index, and the exit angle of the triangular prism, which may be determined according to a calculation model between the refractive index, the critical refractive index, the exit angle of the triangular prism and the refractive index of the solution to be measured, or may be determined according to a formula between the refractive index, the critical refractive index, the exit angle of the triangular prism and the refractive index of the solution to be measured, which is not limited in this embodiment.
Further, in order to simplify the method for determining the refractive index of the solution to be measured, the determining the refractive index of the solution to be measured according to the refractive index of the triangular prism, the critical refractive index, and the exit angle includes:
when the refractive index of the triple prism is smaller than the critical refractive index, determining the refractive index of the solution to be detected through a preset first refraction model according to the refractive index of the triple prism, the critical refractive index and the emergent angle;
and when the refractive index of the triangular prism is larger than the critical refractive index, determining the refractive index of the solution to be detected through a preset second refraction model according to the refractive index of the triangular prism, the critical refractive index and the emergent angle.
For ease of understanding, the description will be made with reference to fig. 7 and 8, but this solution is not limited thereto. Fig. 7 is a light path diagram of the detection light passing through the solution to be detected when the refractive index of the triangular prism is smaller than the critical refractive index, and fig. 8 is a light path diagram of the detection light passing through the solution to be detected when the refractive index of the triangular prism is larger than the critical refractive index. Because the directions of emergent light rays are different due to different refractive indexes of the triangular prisms, the situation-based discussion is needed when calculating the relation between the emergent angle and the refractive index of the solution to be detected, referring to fig. 7 and 8, when the detected light rays are parallel to the glass plate and enter the solution, refraction occurs for 2 times, the vertex angle of the triangular prism is A, and the first emergent angle is alpha 1 The second incident angle is alpha 2 The second exit angle is α. In fig. 7, a = α 1 -α 2 In fig. 8, a = α 1 +α 2 (ii) a The preset first refraction model may be a calculation model between the exit angle determined by the refraction law reflected by the light path diagram 7 and the refractive index of the solution to be measured when the refractive index of the prism is smaller than the critical refractive index, and the preset second refraction model may be a calculation model between the exit angle determined by the refraction law reflected by the light path diagram 8 and the refractive index of the solution to be measured when the refractive index of the prism is larger than the critical refractive index.
Further, in order to solve the technical problems that a calculation method of the preset first refraction model is complex and the calculation data amount is large, the preset first refraction model is as follows:
in the formula, eta is the refractive index of the solution to be measured, eta 0 The refractive index of the triangular prism, alpha is an emergent angle, and A is an apex angle of the triangular prism.
In a specific implementation, for example, a 3% standard glucose solution is selected with a reference refractive index η c =1.3315, apex angle a =60 ° of the triangular prism, the critical refractive index of the triangular prism
When the refractive index of the prism is smaller than the critical refractive index (eta) 0 <1.5375 Selecting refractive index eta 0 The triangular prism with the mark of =1.5000 measures the emergent angle alpha =3.753 degrees, the obtained refractive index of the solution to be measured is taken into a formula eta = pc + q of the refractive index and the concentration of the solution to be measured, the undetermined coefficient p =0.0013333 and q =1.3265 can be obtained, and the concentration can be obtained
The precision reaches four digits and the relative error
Under these conditions, the relationship curve between the concentration of the glucose solution and the emission angle is shown in fig. 9.
Further, in order to solve the technical problems that a calculation method of the preset second refraction model is complex and the calculation data amount is large, the preset second refraction model is:
wherein eta is the refractive index of the solution to be measured 0 The refractive index of the triangular prism, alpha is an emergent angle, and A is an apex angle of the triangular prism.
In a specific implementation, for example, a 3% standard glucose solution is selected with a reference refractive index η c =1.3315, apex angle a =60 ° of triangular prism, critical refractive index of triangular prism
When the refractive index of the prism is larger than the critical refractive index (eta) 0 >1.5375 Selecting refractive index eta 0 =1.8000 prism, measured exit angle alpha=23.256 °, the determined refractive index of the test solution is introduced into the formula η = pc + q for the refractive index and concentration of the test solution, the undetermined coefficients p =0.0013333 and q =1.3265 are determined, and the concentration can be determined
The precision reaches four digits and the relative error
Under these conditions, the relationship curve between the concentration of the glucose solution and the emission angle is shown in fig. 10.
In the embodiment, the refractive index of the solution to be detected is determined by obtaining the refractive index of the triangular prism and the critical refractive index of the solution to be detected and then according to the refractive index of the triangular prism, the critical refractive index and the emergent angle. The influence of the different refractive indexes of the triangular prism on the detection result of the scheme is considered, the refractive index and the critical refractive index of the triangular prism are introduced during detection, the refractive index of the solution to be detected is determined together with the emergent angle, and the experimental result can be more accurate.
Referring to fig. 11, fig. 11 is a schematic flow chart of a solution concentration detection method according to a third embodiment of the present invention.
Based on the foregoing embodiments, in this embodiment, before the step S10, the method further includes:
step S01: and acquiring the current temperature of the solution to be tested through the high-precision temperature control module, and adjusting the current temperature to enable the solution to be tested to be in a standard test state.
It should be understood that the high precision temperature control module may be a digital sensor that converts temperature into electricity using the law that various physical properties of a substance change with temperature, such as a DS18B20 high precision temperature control module.
It should be noted that the standard test state may be adjusted according to the type of the detection solution, for example, the standard test state may be a test state at a temperature of 25 ℃.
In the third embodiment, for the sake of easy understanding, description is made with reference to fig. 4, but this scheme is not limited. Fig. 4 is a core element connection diagram of the solution concentration detection device after the tank sealing, before the solution concentration detection is performed, the high-precision temperature control module 16 acquires the current temperature of the solution to be detected, transmits the temperature data to the main control chip 13 for processing, and ensures that the solution concentration detection is performed in the standard test temperature state, if the current temperature does not satisfy the standard test temperature state, the main control chip 13 controls the buzzer 18 to give an alarm and display prompt information on the display screen, and regulates and controls the current temperature through heat absorption or heat emission, thereby ensuring that the solution concentration detection is performed in the standard test temperature state.
Accordingly, the step S10 includes:
step S10': and when the solution to be tested is in a standard test state, acquiring an emergent angle through the angle instrument.
In the embodiment, before the solution concentration detection, the high-precision temperature control module is started to detect the current temperature, and the current temperature is adjusted to continuously keep the environment temperature in a standard test state, so that the problem that the solution concentration detection precision is reduced due to temperature change is avoided.
Furthermore, an embodiment of the present invention further provides a storage medium, where the storage medium stores a solution concentration detection program, and the solution concentration detection program, when executed by a processor, implements the steps of the solution concentration detection method as described above.
Referring to fig. 12, fig. 12 is a block diagram of a solution concentration detection apparatus according to a first embodiment of the present invention.
As shown in fig. 12, the solution concentration detection apparatus according to the embodiment of the present invention includes:
the angle obtaining module 1201 is used for obtaining the emergent angle of the detection light passing through the solution to be detected through the angle meter.
It can be understood that the execution main body of the embodiment can be a solution concentration detection device, which is designed according to the principle of a grazing incidence method, and comprises a triangular prism, a rotatable triangular plate glass, an angle instrument and the like, and the outgoing angle is automatically acquired through the angle instrument, so that the experimental accuracy is higher.
For convenience of understanding, the description is made with reference to fig. 3, but the present solution is not limited to this scheme, fig. 3 is a structure diagram of a core device of the solution concentration detection apparatus, when a detection experiment starts, a small amount of liquid is sandwiched between a triangular plate glass 2 with a frosted glass surface and one side surface of a triple prism 1, after the frosted glass surface of the plate glass 2 is coated with the liquid to be detected and closed, the width of a gap between the frosted glass surface and the side surface of the triple prism 1 is not more than 2mm, the liquid between the gaps forms a solution film to be detected, so that incident light vertically enters the solution film to be detected, a bright-dark boundary appears in an emergent view field, and the refractive index can be solved according to an emergent angle, and then the solution concentration can be solved.
It should be noted that the angle meter may be a precise angle measuring instrument, referring to fig. 3, the angle meter 6 is installed on two parallel guide rails 4 under the triangular prism 1, when in use, the angle meter 6 needs to be initialized, that is, the value of the angle meter 6 is set to 0, and the top end of the angle meter 6 is parallel to the linear light source under the triangular prism.
It should be understood that the solution to be tested can be any homogeneous, stable, transparent mixture, e.g., various salt solutions, glucose solutions, etc.
In specific implementation, the emergent angle of the detection light passing through the solution to be detected is obtained through the angle meter, the rotating shaft of the angle meter can be rotated, the plane of the angle meter is parallel to the emergent light, the determining button is pressed, the emergent angle of the equivalent parallel light is guided into a corresponding algorithm program of the main control chip through the angle meter by a digital signal with characteristic data to be processed, and the processed emergent angle is displayed on the display screen.
For convenience of understanding, the description is made with reference to fig. 4, but the present solution is not limited thereto, and fig. 4 is a specific structure diagram of the solution concentration detection device after the box sealing, when the detection experiment starts, the commercial power 11 is turned on, the line laser source 21 starts to operate, the commercial power 11 converts 220V AC commercial power into 5V DC power through the AC-DC power module 12, the line laser source 21 generates a bright-dark boundary through the transparent liquid film to be detected of the triangular prism 14, the line laser source 21 is adjusted to make the output light fall within the test range of the angle meter 15, the angle meter 15 is turned on, the outgoing base point is determined, the angle meter plane is manually adjusted to be parallel to the outgoing light, the outgoing angle of the detection light passing through the solution to be detected is automatically measured, the outgoing angle is transmitted to the main control chip 13 to be processed, and then the processed and output to the display screen 19 for displaying.
And a refractive index determining module 1202, configured to determine the refractive index of the solution to be detected according to the exit angle.
It should be noted that the refractive index of the solution to be measured is determined according to the exit angle, which may be directly calculated according to the law of refraction, or determined according to a mapping relationship between the exit angle and the refractive index of the solution to be measured, or determined by searching a table between the exit angle and the refractive index of the solution to be measured, which is not limited in this embodiment.
A concentration determining module 1203, configured to determine a solution concentration of the solution to be detected according to the refractive index.
It should be noted that, the solution concentration of the solution to be measured is determined according to the refractive index, which may be determined according to a linear relationship between the refractive index and the concentration of the solution, or may be determined according to an empirical formula between the refractive index and the concentration of the solution, and this embodiment does not limit this.
Further, in order to enable the solution concentration detection device to detect the concentrations of a plurality of different solutions, empirical formulas of the concentrations and the refractive indexes of the solutions with different concentrations may be configured in advance, and the empirical formulas may be preset and introduced into the solution concentration detection program. Referring to fig. 4, when the solution concentration detection apparatus is used, the type of the solution to be detected is selected by the mode selection module 17, the data of the type of the solution is transmitted to the main control chip 13, and the empirical formula of the concentration and the refractive index corresponding to the type of the solution is selected, and is introduced into the solution concentration detection program programmed in advance for calculation. For example, the empirical formula of the relationship between the concentration of the glucose solution and the refractive index at 25 ℃ is η = pc + q, wherein the undetermined coefficients p =0.0013333 and q =1.3265 (the values of the undetermined coefficients a and B are both obtained by experimental linear fitting), and the solution concentration c can be determined by the formula by substituting the refractive index η of the solution to be measured.
According to the grazing incidence principle, the emergent angle of the detection light passing through the solution to be detected is accurately obtained through the angle meter, the refractive index is determined through the emergent angle, and the concentration is determined through the refractive index; in addition, the method utilizes the angle meter to obtain the emergent angle without observing and measuring by human eyes, and the method ensures that the solution concentration detection method has simple principle, convenient, fast and accurate measurement and low cost.
A second embodiment of the solution concentration detection apparatus of the present invention is proposed based on the first embodiment of the solution concentration detection apparatus of the present invention.
Further, the refractive index determining module 1202 is further configured to obtain a refractive index of the triangular prism and a critical refractive index of the solution to be detected; and determining the refractive index of the solution to be detected according to the refractive index of the triangular prism, the critical refractive index and the emergent angle.
Further, the refractive index determining module 1202 is further configured to obtain a reference refractive index of the solution to be detected and a vertex angle of the triangular prism; and determining the critical refractive index of the solution to be detected according to the reference refractive index of the solution to be detected and the angle of the vertex angle of the triangular prism.
Further, the refractive index determining module 1202 is further configured to determine, when the refractive index of the triangular prism is smaller than the critical refractive index, the refractive index of the solution to be measured according to the refractive index of the triangular prism, the critical refractive index, and the exit angle through a preset first refraction model; when the refractive index of the triangular prism is larger than the critical refractive index, determining the refractive index of the solution to be detected through a preset second refraction model according to the refractive index of the triangular prism, the critical refractive index and the emergent angle
Further, the refractive index determining module 1202 is further configured to define the preset first refractive model as:
wherein eta is the refractive index of the solution to be measured 0 The refractive index of the triangular prism, alpha is an emergent angle, and A is an apex angle of the triangular prism.
Further, the refractive index determination module 1202 is further configured to define the preset second refraction model as:
in the formula, eta is the refractive index of the solution to be measured, eta 0 Let alpha be the exit angle, and A be the prism apex angle.
Further, the angle obtaining module 1201 is further configured to obtain a current temperature of the solution to be tested through the high-precision temperature control module, and adjust the current temperature to enable the solution to be tested to be in a standard test state; correspondingly, through the angular instrument obtains the exit angle that detects light and passes the solution that awaits measuring, includes: and when the solution to be tested is in a standard test state, acquiring an emergent angle through the angle instrument.
Other embodiments or specific implementation manners of the solution concentration detection device of the present invention may refer to the above method embodiments, and are not described herein again.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention or portions thereof contributing to the prior art may be embodied in the form of a software product, where the computer software product is stored in a storage medium (such as a rom/ram, a magnetic disk, and an optical disk), and includes several instructions for enabling a terminal device (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the methods according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A solution concentration detection method applied to a solution concentration detection apparatus comprising: an angle gauge;
the solution concentration detection method comprises the following steps:
acquiring an emergent angle of detection light passing through the solution to be detected through the angle instrument;
determining the refractive index of the solution to be detected according to the emergent angle;
and determining the solution concentration of the solution to be detected according to the refractive index.
2. The solution concentration detection method according to claim 1, wherein the solution concentration detection apparatus further comprises: a prism;
the step of determining the refractive index of the solution to be detected according to the emergent angle comprises the following steps:
obtaining the refractive index of the triangular prism and the critical refractive index of the solution to be detected;
and determining the refractive index of the solution to be detected according to the refractive index of the triangular prism, the critical refractive index and the emergent angle.
3. The solution concentration detection method according to claim 2, wherein the step of obtaining the refractive index of the triangular prism and the critical refractive index of the solution to be measured further comprises, before the step of obtaining the refractive index of the triangular prism and the critical refractive index of the solution to be measured:
acquiring a reference refractive index of the solution to be detected and a vertex angle of the triangular prism;
and determining the critical refractive index of the solution to be detected according to the reference refractive index of the solution to be detected and the angle of the vertex angle of the triangular prism.
4. The solution concentration detection method according to claim 2, wherein the step of determining the refractive index of the solution to be measured based on the refractive index of the triangular prism, the critical refractive index, and the exit angle includes:
when the refractive index of the triangular prism is smaller than the critical refractive index, determining the refractive index of the solution to be detected through a preset first refraction model according to the refractive index of the triangular prism, the critical refractive index and the emergent angle;
and when the refractive index of the triangular prism is larger than the critical refractive index, determining the refractive index of the solution to be detected through a preset second refraction model according to the refractive index of the triangular prism, the critical refractive index and the emergent angle.
5. The method for detecting the concentration of a solution according to claim 4, wherein the preset first refraction model is:
wherein eta is the solution to be measuredRefractive index of [ (. Eta. ]) 0 Let alpha be the exit angle, and A be the prism apex angle.
6. The solution concentration detection method according to claim 4, wherein the preset second refraction model is:
in the formula, eta is the refractive index of the solution to be measured, eta 0 Let alpha be the exit angle, and A be the prism apex angle.
7. The solution concentration detection method according to any one of claims 1 to 6, wherein the solution concentration detection apparatus further comprises: a high-precision temperature control module;
before the step of obtaining the emergent angle of the detection light passing through the solution to be detected by the angle meter, the method further comprises the following steps:
acquiring the current temperature of the solution to be tested through the high-precision temperature control module, and adjusting the current temperature to enable the solution to be tested to be in a standard test state;
correspondingly, the step of obtaining the emergent angle of the detection light passing through the solution to be detected through the angle meter comprises the following steps:
and when the solution to be tested is in a standard test state, acquiring an emergent angle through the angle instrument.
8. A solution concentration detection apparatus, characterized in that the apparatus comprises:
the angle acquisition module is used for acquiring the emergent angle of the detection light passing through the solution to be detected through the angle meter;
the refractive index determining module is used for determining the refractive index of the solution to be detected according to the emergent angle;
and the concentration determination module is used for determining the solution concentration of the solution to be detected according to the refractive index.
9. A solution concentration detection apparatus, characterized by comprising: goniometers and prisms; the solution concentration detection apparatus further includes: a memory, a processor, and a solution concentration detection program stored on the memory and executable on the processor, the solution concentration detection program configured to implement the steps of the solution concentration detection method according to any one of claims 1 to 7.
10. A storage medium, characterized in that a solution concentration detection program is stored thereon, which when executed by a processor implements the steps of the solution concentration detection method according to any one of claims 1 to 7.
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