CN111721743A - Method and device for identifying liquid type by using characteristic value - Google Patents
Method and device for identifying liquid type by using characteristic value Download PDFInfo
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Abstract
The invention discloses a method and a device for identifying liquid types by using characteristic values, which comprises the following steps: (1) preparing a transparent liquid container, and measuring the illumination intensity value of a light source penetrating through the bottom of the liquid container when the liquid container is not filled with the liquid as a reference value of an illumination intensity characteristic value; (2) putting liquid to be detected into a liquid container, and measuring a characteristic value of the liquid to be detected, wherein the characteristic value of the liquid is a pH value, a change value of illumination intensity relative to an illumination reference value, a conductivity value of a solution and a gas concentration value; (3) sequentially judging whether the acquired liquid characteristic value of the liquid to be detected reaches a preset threshold value, and if the acquired liquid characteristic value does not accord with the preset threshold value, continuously judging the next characteristic value; and if the collected liquid characteristic value accords with a preset threshold value, identifying the type of the liquid to be detected. The invention collects the multiple characteristic values of the solution, and overcomes the defects of inaccurate identification and poor anti-interference capability brought by a method for identifying the type of the liquid according to the spectral wavelength absorbed by the liquid and the refraction condition of light in different liquids by irradiating with a single light source.
Description
Technical Field
The invention belongs to the technical field of liquid type identification, and particularly relates to a method and a device for identifying liquid types by using characteristic values.
Background
At present, the liquid type identification adopts laser rays to penetrate liquid, and then the liquid type is analyzed according to the spectral wavelength absorbed by the liquid; some of them use common light source to irradiate liquid, and analyze the liquid according to the refraction of light in water. The method adopts light source irradiation almost exclusively, and different liquids are identified according to the spectral wavelength absorbed by the liquids and the refraction condition of light in different liquids, the method has extremely poor anti-interference performance, and is easy to be interfered by natural environment and human influence factors to change the identification result, and if the strong light irradiation with different wavelengths and the environment brightness change, the detection result can not achieve the expected purpose. Since they analyze the light according to the propagation characteristics of the light in water, the recognition result is biased when the light condition is changed. The above patents are identified by CN201080068529.7, CN201510057236.3 and CN 201510359144.0.
Meanwhile, a method for identifying the type of liquid by collecting the illumination intensity value of a light source penetrating through the liquid is also found, for example, application number 201610871791.4, the method utilizes the illumination intensity value of the light source penetrating through the liquid to compare with the similarity of a database established in advance, if external illumination interference exists, the illumination intensity value of the light source penetrating through the liquid in the device is changed, and the obtained illumination intensity value is greatly deviated from the contrast value of the database set originally, so that the identification result is influenced; secondly, the method does not calibrate the numerical values in the database before testing, the environmental illumination values are different in different occasions, the illumination intensity value of the same liquid light source after penetrating through the liquid is also changed, the values in the database are not calibrated for the second time along with different environments, and difference errors can exist when the values are compared with the data in the database.
Disclosure of Invention
The invention aims to solve the technical problems and provides a method and a device for identifying the type of liquid by using a characteristic value, which have strong anti-interference capability and are not influenced by natural environment and human factors.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a method for identifying a type of liquid by a characteristic value, comprising the steps of:
(1) preparing a transparent liquid container, and measuring the illumination intensity value of a light source penetrating through the bottom of the liquid container when the liquid container is not filled with the liquid as a reference value of an illumination intensity characteristic value;
(2) putting liquid to be detected into a liquid container, and measuring characteristic values of the liquid to be detected, wherein the characteristic values of the liquid are a pH value, an illumination intensity change value, a conductivity value of a solution and a volatile gas concentration value of volatile liquid;
(3) sequentially judging whether the acquired liquid characteristic value of the liquid to be detected meets a preset threshold value or not, and if the acquired liquid characteristic value does not meet the preset threshold value, continuing to judge the next characteristic value; and if the collected liquid characteristic value accords with a preset threshold value, identifying the type of the liquid to be detected.
As a further technical scheme, the sequence of the characteristic values in the step (3) is pH value, illumination intensity change value, conductivity value of the solution and concentration value of the volatile gas.
As a further technical scheme, the illumination intensity variation value is a variation obtained by comparing an illumination intensity characteristic value of the same light source penetrating through the liquid to be measured with the reference value.
As a further technical scheme, the liquid to be measured is any one of purified water, salt water, vinegar, alcohol and milk.
As a further technical scheme, when the pH value of the liquid to be detected is judged, the pH value of the vinegar is taken as a preset threshold value, and if the pH value of the liquid to be detected is not more than the pH value of the vinegar, the liquid to be detected is determined to meet the preset threshold value; when the illumination intensity change value of the liquid to be detected is judged, the illumination intensity change value of the milk is taken as a preset threshold value, and if the illumination intensity change value of the liquid to be detected is not greater than the illumination intensity change value of the milk, the liquid to be detected is determined to be in accordance with the preset threshold value; when the conductivity value of the liquid to be measured is judged, the conductivity value of the saline water is taken as a preset threshold value, and if the conductivity value of the liquid to be measured is not less than the conductivity value of the saline water, the liquid to be measured is determined to be in accordance with the preset threshold value; when the concentration value of the volatile gas of the liquid to be detected is judged, the concentration value of the volatile gas of the alcohol liquid is a preset threshold value, and if the concentration value of the volatile gas of the liquid to be detected is not less than the concentration value of the volatile gas of the alcohol liquid, the liquid to be detected is determined to be in accordance with the preset threshold value.
An apparatus for implementing the method for identifying a kind of liquid by a feature value as described above, comprising:
the liquid container is used for containing liquid to be detected and installing the characteristic value detection sensor;
the characteristic value detection sensor is arranged in the liquid container and is used for detecting the pH value, the illumination intensity change value, the conductivity value of the solution and the volatile gas concentration value of the volatile liquid of the liquid to be detected;
the singlechip is used for storing a preset threshold value of the pH value, the illumination intensity change value, the conductivity value of the solution and the volatile gas concentration value of the volatile liquid, sequentially comparing the pH value, the illumination intensity change value, the conductivity value of the solution and the volatile gas concentration value of the volatile liquid with the preset threshold value, and sending the identification result to the display device for displaying; the input interface of the single chip microcomputer is electrically connected with the characteristic value detection sensor;
the display is used for displaying the type identification result of the liquid to be detected and is electrically connected with the singlechip in a bidirectional way;
and the input button is used for starting the identification function and is electrically connected with the input end of the singlechip.
As a further technical solution, the characteristic value detection sensor includes an illuminance sensor, a pH detection pen, a water conductivity sensor and an alcohol gas sensor, the detection ends of the illuminance sensor, the pH detection pen and the water conductivity sensor are mounted at the inner side of the bottom of the liquid container, the other positions are mounted at the outer side of the bottom of the liquid container, and the alcohol gas sensor is mounted at the upper side wall of the liquid container.
As a further technical scheme, the single chip microcomputer adopts an STC12C5A60S2 microprocessor.
As a further technical scheme, the input buttons adopt independent keys.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention overcomes the defects of inaccurate identification and poor anti-interference capability brought by a method for identifying the type of liquid according to the spectral wavelength absorbed by the liquid and the refraction condition of light in different liquids by using light source irradiation.
2. The method adopts 'characteristic value identification', and utilizes various sensors to collect the characteristic value of the liquid, wherein the characteristic value is a distinguishing method that the liquid has the characteristic of no commonality with other liquids or the digital range of the characteristic value is obviously different from other liquids. The technical identification situation that the identification result is changed due to the intervention of natural environment and human influence factors is overcome.
3. The invention eliminates the collected characteristic values through successive comparison of the singlechip and the set threshold values of the characteristic values, finally identifies the processing flow and the method of the liquid type, and the identification accuracy is very high according to the flow processing of the pH value, the illumination intensity change value, the conductivity value of the solution and the volatile gas concentration value of the volatile liquid. The method and the device provided by the invention can identify purified water, saline water, vinegar, alcohol and milk. Among the liquids, the pH value is the most obvious characteristic of vinegar to distinguish other liquids, the illumination intensity value is the most obvious characteristic of milk to distinguish other liquids, the conductivity value is the most obvious characteristic of salt water to distinguish other liquids, the alcohol liquid has volatility, the concentration value of alcohol volatilization is the most obvious characteristic to distinguish other liquids, and if the characteristics are not provided, the left result is pure water. The sequence of the above identification and the process of finding the characteristic value are identification according to the characteristic that the liquid to be detected has no commonality with other liquids or the digital range of the characteristic value is clearly distinguished from other liquids, and the identification method is not limited to a certain one. Before measurement, the illumination intensity value of the light source penetrating through the bottom of the liquid container when the liquid is not contained is measured and is used as a reference value of the illumination intensity characteristic value, so that difference errors caused by different environmental illumination can be eliminated.
4. The invention has strong flexibility and high accuracy. Because different external influences exist in different environments, the invention can recalibrate the preset threshold value which is the pH value of vinegar, the change value of the illumination intensity of milk, the conductivity value of brine and the concentration value of volatile gas of alcohol liquid, does not need complex detection conditions, can directly obtain visual data by adopting a sensor and a single chip microcomputer, has simple calibration process, can be flexibly applied to various environments, and solves the problem of different external influences. Meanwhile, the identification device adopts a mode of installing the sensor in a contact mode and a non-contact mode, so that the identification means is more flexible, and the condition that the identification means is single due to the fact that a single method or a single light source irradiation method is adopted is overcome.
5. The identification device of the invention is free of radiation and microwave materials, and is green and safe.
Drawings
FIG. 1 is a process flow diagram of a method for identifying a type of a liquid by a feature value according to the present invention;
FIG. 2 is a schematic structural diagram of an apparatus for identifying a type of a liquid according to a characteristic value of the present invention;
FIG. 3 is a display interface diagram of the display according to the present invention.
Reference numerals: 1-liquid container, 2-characteristic value detection sensor, 21-alcohol gas sensor, 22-illumination sensor, 23-pH value detection pen, 24-conductivity sensor, 3-single chip microcomputer, 4-display, 41-title information display column, 42-time information display column, 43-identification state display column, 44-identification result display column, 45-software information version display column and 5-input button.
Detailed Description
The present invention will be described in further detail with reference to examples, but the embodiments of the present invention are not limited to the scope of the examples.
Example 1:
a method for identifying a type of liquid by a characteristic value, comprising the steps of:
(1) preparing a transparent liquid container, and measuring the illumination intensity value of a light source penetrating through the bottom of the liquid container when the liquid container is not filled with the liquid as a reference value of an illumination intensity characteristic value;
(2) putting the liquid to be measured into a liquid container, and measuring the characteristic values of the liquid to be measured, wherein the characteristic values of the liquid are a pH value, an illumination intensity change value, a conductivity value of the solution and a volatile gas concentration value of the volatile liquid; the illumination intensity variation value is the variation after the illumination intensity characteristic value of the same light source penetrating through the liquid to be detected is compared with a reference value; the liquid to be tested is any one of purified water, saline, vinegar, alcohol and milk.
(3) Sequentially judging whether the collected liquid characteristic value of the liquid to be detected meets a preset threshold value, judging the sequence of the liquid characteristic value of the liquid to be detected to be a pH value, an illumination intensity change value, a solution conductivity value and a volatile gas concentration value, and if the collected liquid characteristic value does not meet the preset threshold value, continuously judging the next characteristic value; if the collected liquid characteristic value meets a preset threshold value, identifying the type of the liquid to be detected; when the pH value of the liquid to be detected is judged, the pH value of the vinegar is taken as a preset threshold value, and if the pH value of the liquid to be detected is not more than the pH value of the vinegar, the liquid to be detected is determined to meet the preset threshold value; when the illumination intensity change value of the liquid to be detected is judged, the illumination intensity change value of the milk is taken as a preset threshold value, and if the illumination intensity change value of the liquid to be detected is not greater than the illumination intensity change value of the milk, the liquid to be detected is determined to be in accordance with the preset threshold value; when the conductivity value of the liquid to be measured is judged, the conductivity value of the saline water is taken as a preset threshold value, and if the conductivity value of the liquid to be measured is not less than the conductivity value of the saline water, the liquid to be measured is determined to be in accordance with the preset threshold value; when the concentration value of the volatile gas of the liquid to be detected is judged, the concentration value of the volatile gas of the alcohol liquid is a preset threshold value, and if the concentration value of the volatile gas of the liquid to be detected is not less than the concentration value of the volatile gas of the alcohol liquid, the liquid to be detected is determined to be in accordance with the preset threshold value.
Example 2:
an apparatus for performing the method of example 1, comprising:
the liquid container 1 is used for containing liquid to be detected and installing the characteristic value detection sensor 2;
the characteristic value detection sensor 2 is arranged in the liquid container 1 and is used for detecting the pH value, the illumination intensity change value, the conductivity value of the solution and the volatile gas concentration value of the volatile liquid of the liquid to be detected;
the singlechip 3 is used for storing a preset threshold value of the pH value, the illumination intensity change value, the conductivity value of the solution and the volatile gas concentration value of the volatile liquid, sequentially comparing the pH value, the illumination intensity change value, the conductivity value of the solution and the volatile gas concentration value of the volatile liquid with the preset threshold value, and sending the identification result to the display 4 for displaying; the input interface of the singlechip 3 is electrically connected with the characteristic value detection sensor 2;
the display 4 is used for displaying the type identification result of the liquid to be detected, and the display 4 is electrically connected with the singlechip 3 in a bidirectional way; the items displayed on the display 4 are: a title information display field 41, a time information display field 42, a recognition state display field 43, a recognition result display field 44, and a software information version display field 45.
And the input button 5 is used for starting the identification function, and the input button 5 is electrically connected with the input end of the singlechip 3.
The characteristic value detection sensor 2 comprises an illumination sensor 22, a pH value detection pen 23, a water quality and conductivity sensor 24 and an alcohol gas sensor 21, the sensors are all used as liquid characteristic value information acquisition sensors which are connected with an I/O port of a singlechip 3 through communication wires, the illumination sensor 22, the pH value detection pen 23 and the water quality electrolysis sensor are sealed and waterproof and then expose detection parts to be arranged at the bottom of the liquid container 1, to prevent short circuit, the alcohol gas sensor 21 is suspended and fixed on the upper side wall of the liquid container 1 through a hinge, when liquid to be measured is contained in the liquid container 1, the liquid contacts various sensors at the bottom of the liquid container 1, the sensors begin to adopt characteristic value data of the liquid to be measured, and the characteristic value of the alcohol can be sensed by an alcohol gas sensor 21 arranged on the side wall of the upper part of the liquid container 1 due to volatility of the alcohol. The singlechip 3 adopts an STC12C5A60S2 microprocessor. The input buttons 5 are independent keys. The preset threshold values of the embodiment 1 are stored in the single chip microcomputer 3, and the microprocessor is a low-power-consumption and high-performance processor of a macro crystal company and is responsible for reading characteristic values of liquid sensed by various sensors in real time and processing and comparing data to obtain the types of the liquid. The input button 5 is an independent key and is mainly used for inputting a control instruction.
More specifically, the input button 5 includes an identification button with an identification function, the input button 5 is electrically connected to pins P2.0, P2.1, P2.2, P2.3, P2.4, P2.5, P2.6 and P2.7 of the single chip microcomputer 3, the alcohol gas sensor 21 is electrically connected to pin P1.0 of the single chip microcomputer 3, the illuminance sensor 22 is electrically connected to pin P1.3 of the single chip microcomputer 3, the pH detection pen 23 is electrically connected to pin P1.2 of the single chip microcomputer 3, the conductivity sensor 24 is electrically connected to pin P1.1 of the single chip microcomputer 3, and pins P0.0, P0.1, P0.2, P0.3, P0.4, P0.5, P0.6 and P0.7 of the single chip microcomputer 3 are connected to the display 4.
The specific operation flow is that any one of five liquids of purified water, salt water, vinegar, alcohol and milk is put into the liquid container 1, the various sensors are controlled by a 'start' button to collect characteristic values of the liquid, and the collected characteristic values are subjected to type recognition by a 'characteristic value recognition method' by the STC12C5A60S2 and displayed on the liquid crystal display 4. The specific processing procedure of the characteristic value identification method is as follows:
the single chip microcomputer 3 controls the characteristic value detection sensor 2 to transmit back collected liquid characteristic value data, and the collected liquid characteristic value data are shown in a table 1 (note: the illumination intensity value is measured in an indoor environment in summer and daytime, the room temperature is about 26 ℃, and the data measurement is measured by using a special professional instrument):
TABLE 1
Firstly processing pH value characteristic data, if the pH value characteristic data reaches a preset threshold value, considering that the liquid is vinegar, if not, processing illumination intensity change value characteristic data (a point is specially explained here, the liquid is distinguished by the illumination intensity change value, an illumination intensity value is collected before any liquid is contained in the liquid container 1, the measurement is started once again after the liquid to be measured is contained, the previous measured value is taken as a reference value, the next measured value is compared with the previous measured value, so that the illumination intensity change value can be obtained, the liquids to be measured only have the worst light transmittance of milk and are taken as milk characteristic value judgment information), if the illumination intensity change value is lower than the preset threshold value, considering that the liquid is milk, if not, processing a conductivity value is started, if the conductivity value reaches the preset threshold value, considering that the liquid is saline water, if not, the data of the alcohol gas sensor 21 is processed, the alcohol gas concentration reaches a preset threshold value, the liquid is considered to be alcohol, if the alcohol concentration does not reach the preset threshold value, only one liquid class is available, the liquid class is pure water, and the single chip microcomputer 3 of the final recognition result is transmitted to the display 4 to be displayed. The method selects the most essential distinguishing characteristic of each liquid, and utilizes a characteristic value identification method to enable various sensors to collect the characteristic values of the liquids, wherein the characteristic values are the characteristics that the liquid has no commonality with other liquids or the digital range of the characteristic values is obviously different from other liquids, and the method has high identification accuracy and simple processing flow.
Claims (9)
1. A method for identifying the type of liquid by using a characteristic value is characterized by comprising the following steps:
preparing a transparent liquid container, and measuring the illumination intensity value of a light source penetrating through the bottom of the liquid container when the liquid container is not filled with the liquid as a reference value of an illumination intensity characteristic value;
putting liquid to be detected into a liquid container, and measuring characteristic values of the liquid to be detected, wherein the characteristic values of the liquid are a pH value, an illumination intensity change value, a conductivity value of a solution and a volatile gas concentration value of volatile liquid;
sequentially judging whether the collected liquid characteristic value of the liquid to be detected meets a preset threshold value or not, and if the collected liquid characteristic value does not meet the preset threshold value, continuing to judge the next characteristic value; and if the collected liquid characteristic value accords with a preset threshold value, identifying the type of the liquid to be detected.
2. The method of claim 1, wherein the method further comprises the steps of: and (4) judging the sequence of the characteristic values in the step (3) to be a pH value, a light intensity change value, a conductivity value of the solution and a concentration value of the volatile gas.
3. The method of claim 1, wherein the method further comprises the steps of: the illumination intensity variation value is the variation after the illumination intensity characteristic value of the same light source penetrating through the liquid to be measured is compared with the reference value.
4. The method of claim 1, wherein the method further comprises the steps of: the liquid to be detected is any one of purified water, salt water, vinegar, alcohol and milk.
5. The method of claim 4, wherein the method further comprises the steps of: when the pH value of the liquid to be detected is judged, the pH value of the vinegar is taken as a preset threshold value, and if the pH value of the liquid to be detected is not more than the pH value of the vinegar, the liquid to be detected is determined to meet the preset threshold value; when the illumination intensity change value of the liquid to be detected is judged, the illumination intensity change value of the milk is taken as a preset threshold value, and if the illumination intensity change value of the liquid to be detected is not greater than the illumination intensity change value of the milk, the liquid to be detected is determined to be in accordance with the preset threshold value; when the conductivity value of the liquid to be measured is judged, the conductivity value of the saline water is taken as a preset threshold value, and if the conductivity value of the liquid to be measured is not less than the conductivity value of the saline water, the liquid to be measured is determined to be in accordance with the preset threshold value; when the concentration value of the volatile gas of the liquid to be detected is judged, the concentration value of the volatile gas of the alcohol liquid is a preset threshold value, and if the concentration value of the volatile gas of the liquid to be detected is not less than the concentration value of the volatile gas of the alcohol liquid, the liquid to be detected is determined to be in accordance with the preset threshold value.
6. An apparatus for carrying out the method for identifying a kind of liquid by a characteristic value according to any one of claims 1 to 5, comprising
The liquid container is used for containing liquid to be detected and installing the characteristic value detection sensor;
the characteristic value detection sensor is arranged in the liquid container and is used for detecting the pH value, the illumination intensity change value, the conductivity value of the solution and the volatile gas concentration value of the volatile liquid of the liquid to be detected;
the singlechip is used for storing a preset threshold value of the pH value, the illumination intensity change value, the conductivity value of the solution and the volatile gas concentration value of the volatile liquid, sequentially comparing the pH value, the illumination intensity change value, the conductivity value of the solution and the volatile gas concentration value of the volatile liquid with the preset threshold value, and sending the identification result to the display device for displaying; the input interface of the single chip microcomputer is electrically connected with the characteristic value detection sensor;
the display is used for displaying the type identification result of the liquid to be detected and is electrically connected with the singlechip in a bidirectional way;
and the input button is used for starting the identification function and is electrically connected with the input end of the singlechip.
7. The apparatus of claim 6, wherein: the characteristic value detection sensor comprises an illuminance sensor, a pH value detection pen, a water quality conductivity sensor and an alcohol gas sensor, the detection ends of the illuminance sensor, the pH value detection pen and the water quality conductivity sensor are mounted at the inner side of the bottom of the liquid container, the rest parts of the illuminance sensor, the pH value detection pen and the water quality conductivity sensor are mounted at the outer side of the bottom of the liquid container, and the alcohol gas sensor is mounted on the side wall of the upper part of the liquid container.
8. The apparatus of claim 6, wherein: the single chip microcomputer adopts an STC12C5A60S2 microprocessor.
9. The apparatus of claim 6, wherein: the input button adopts an independent key.
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106248588A (en) * | 2016-09-29 | 2016-12-21 | 深圳中盛智兴科技有限公司 | A kind of Liquid identification method, device and container |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106248588A (en) * | 2016-09-29 | 2016-12-21 | 深圳中盛智兴科技有限公司 | A kind of Liquid identification method, device and container |
Non-Patent Citations (2)
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| 王永华 等: "《食品感官评定》", 31 March 2018, 中国轻工业出版社 * |
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