CN113607726A - Water quality monitoring system device and water quality monitoring method for heavy metal wastewater - Google Patents
Water quality monitoring system device and water quality monitoring method for heavy metal wastewater Download PDFInfo
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- 238000003860 storage Methods 0.000 claims description 15
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Abstract
The invention provides a water quality monitoring system device and a water quality monitoring method for heavy metal wastewater. The method comprises the following steps: (1) temporarily storing a water sample of the heavy metal wastewater, and carrying out image acquisition on the water sample to obtain a water sample image; (2) performing image processing on the water sample image obtained in the step (1) to obtain image information; (3) analyzing and calculating the image information obtained in the step (2) to obtain the content of heavy metals in the water sample; (4) and (4) comparing the content of the heavy metal obtained in the step (3) with the content index range of the corresponding heavy metal, storing the comparison result, and controlling the subsequent flow direction of the heavy metal wastewater according to the comparison result. The invention reduces the probability of the phenomenon that the pollutant emission concentration of heavy metal production enterprises exceeds the standard, improves the wastewater treatment efficiency and reduces the water quality monitoring cost.
Description
Technical Field
The invention belongs to the field of wastewater treatment, relates to a water quality monitoring method, and particularly relates to a water quality monitoring system device and a water quality monitoring method for heavy metal wastewater.
Background
With the gradual acceleration of the urbanization process in China, the industrial park plays a positive role in the economic development of cities. The heavy metal wastewater in the industrial park mainly comes from sewage and waste liquid generated in the production process of enterprises such as electroplating enterprises, circuit boards and the like in the park. After heavy metal wastewater is pretreated by most enterprises, the wastewater is discharged to a sewage centralized treatment facility matched with a park, and the wastewater is discharged after reaching the standard after being treated uniformly. However, due to the large difference of products of various enterprises and the difference of production scale, raw materials, auxiliary materials and process level, the difference of waste water quantity, water quality and characteristics is large, and the components of pollutants are complex.
The conventional water quality monitoring method is to sample water and send the water to a laboratory for water quality analysis, the method is time-consuming and labor-consuming, the cost is high, the result is always delayed, if the excessive wastewater enters a wastewater treatment system, the subsequent treatment process is adversely affected, and the effluent can not reach the standard. And the sample is easy to cause secondary pollution in the manual sampling process, so that the detection result has larger error.
CN 112730784A discloses an industrial wastewater treatment water quality monitoring system, which comprises a clean energy supply module, a monitoring camera, a field management server, an electromagnetic valve, an environment monitoring module, a water body monitoring box, a monitoring module, a liquid supply pump, a submersible pump, a water tank and a water level sensor; the clean energy supply module is used for supplying clean energy and is electrically connected with the field management server and the control room; the monitoring camera is arranged at the wastewater treatment part and is in communication connection with the field management server; the system is used for collecting the scene pictures and sending the scene pictures to the scene management server. According to the invention, the water body monitoring is arranged, and the liquid supply pump is adopted to inject water into the water body monitoring box, so that the water body monitoring box is cleaned, and the accuracy of a result during detection is improved; and cleaning function is performed through the cleaning function module. However, the invention can not realize the automatic guiding function of the overproof wastewater, and the overproof wastewater can not be prevented from entering a subsequent sewage treatment system in time by controlling the overproof wastewater according to real-time monitoring data manually, so that the effluent finally does not reach the standard. In addition, the detection module needs to use expensive precision instruments, and the water quality monitoring cost is improved.
Therefore, how to manage and control the water inlet concentration of the wastewater, standardizing the pollution discharge behaviors of industrial park enterprises, reducing the probability of the phenomenon that the pollutant discharge concentration of heavy metal production enterprises exceeds the standard to the maximum extent, improving the wastewater treatment efficiency, reducing the water quality monitoring cost and solving the key problem facing the centralized treatment facility of the industrial park.
Disclosure of Invention
The invention aims to provide a water quality monitoring system device and a water quality monitoring method for heavy metal wastewater, which furthest reduce the probability of the phenomenon that the pollutant emission concentration of heavy metal production enterprises exceeds the standard, improve the wastewater treatment efficiency, reduce the water quality monitoring cost and overcome the key problems of centralized treatment facilities in industrial parks.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the invention provides a water quality monitoring system device for heavy metal wastewater, which comprises an automatic sampling device, an image acquisition device, a data analysis and calculation device, a control device, a valve device, an alarm device and a cloud platform.
The automatic sampling device is used for temporarily storing a water sample of the heavy metal wastewater.
The image acquisition device is used for acquiring images of water samples in the automatic sampling device.
And the data analysis and calculation device is in communication connection with the image acquisition device.
The control device and the cloud platform are respectively and independently in communication connection with the data analysis and computing device.
The automatic sampling device, the valve device and the alarm device are respectively and independently in communication connection with the control device.
The water quality monitoring system device provided by the invention realizes the integration of the Internet of things and the image analysis technology through the mutual matching of a plurality of devices with specific functions, achieves the purpose of quickly determining the contents of different heavy metals in the heavy metal wastewater inlet water, starts an alarm state for the overproof inlet water, furthest reduces the probability of the phenomenon that the pollutant emission concentration of heavy metal production enterprises exceeds the standard, improves the stability of process operation, regulates the pollution discharge behavior of industrial park enterprises, improves the wastewater treatment efficiency, and overcomes the key problems of centralized treatment facilities in the industrial park.
Preferably, the automatic sampling device comprises at least 2 sample holding tanks, for example, 2, 3, 4, 5, 6, 7, 8, 9 or 10, but not limited to the recited values, and other values not recited in the range of values are also applicable.
Preferably, the at least 2 water sample temporary storage tanks are mutually separated by adopting a partition plate.
Preferably, at least 2 water sample temporary storage tanks all are provided with the top cap.
Preferably, the inner walls, the partition plates and the top cover of the at least 2 water sample temporary storage tanks are made of opaque white materials respectively and independently.
In the invention, the inner wall of the water sample temporary storage tank, the partition plate and the top cover are respectively and independently made of opaque white materials, and the top cover is arranged to construct a closed environment, so that the influence of sunlight or other light on the image acquisition process is effectively avoided, and the monitoring result is more accurate. The opaque white material is not particularly limited as long as it satisfies the characteristics of opaque and white color, and may be, for example, polystyrene or polypropylene.
Preferably, the image acquisition device comprises an image acquirer and an LED lamp.
Preferably, the image collector comprises a camera or a hyperspectral spectrometer.
Preferably, the image acquisition device is suspended right above the automatic sampling device.
Preferably, the image acquisition device moves along an x-axis, a y-axis or a z-axis during image acquisition.
In the invention, the image acquisition device is suspended right above the automatic sampling device and moves along an x axis, a y axis or a z axis in the image acquisition process, so that the image acquisition of a water sample in the automatic sampling device is facilitated according to actual needs, and the periodic reciprocating movement of the image acquisition device can be carried out at regular time or in a certain time period.
Preferably, the control means comprises a PLC controller.
According to the invention, the opening and closing of the valve device and the alarm device are controlled by the PLC, so that the time of manual operation is saved, and the water treatment efficiency is effectively improved.
Preferably, the cloud platform is used for storing water quality monitoring data and generating a historical data curve.
In a second aspect, the present invention provides a method for monitoring the water quality of heavy metal wastewater by using the water quality monitoring system apparatus according to the first aspect, the method comprising the following steps:
(1) temporarily storing a water sample of the heavy metal wastewater, and carrying out image acquisition on the water sample to obtain a water sample image;
(2) performing image processing on the water sample image obtained in the step (1) to obtain image information;
(3) analyzing and calculating the image information obtained in the step (2) to obtain the content of heavy metals in the water sample;
(4) and (4) comparing the content of the heavy metal obtained in the step (3) with the content index range of the corresponding heavy metal, storing the comparison result, and controlling the subsequent flow direction of the heavy metal wastewater according to the comparison result.
Wherein the heavy metal elements of the heavy metal wastewater comprise any one or a combination of at least two of copper, nickel, chromium, manganese, iron, cadmium or cobalt, and typical but non-limiting combinations comprise a combination of copper and nickel, a combination of nickel and chromium, a combination of chromium and manganese, a combination of manganese and iron, a combination of iron and cadmium, a combination of cadmium and cobalt, a combination of copper, nickel and chromium, a combination of nickel, chromium and manganese, a combination of chromium, manganese and iron, a combination of manganese, iron and cadmium, or a combination of iron, cadmium and cobalt.
In the invention, the heavy metal elements contained in the heavy metal wastewater can be colored or colorless, when the monitored heavy metal elements are colorless elements, the monitored heavy metal elements and metal ions to be monitored are subjected to color development reaction by adding corresponding chemical reagents, and then image acquisition is carried out.
The water quality monitoring method provided by the invention utilizes the image analysis technology to rapidly determine the contents of different heavy metals in the heavy metal wastewater inlet water, and the non-contact automatic water quality monitoring method prevents the heavy metal water sample from harming human bodies, avoids errors of manual detection and improves the safety and accuracy of monitoring. In addition, the method integrates the Internet of things and the image analysis technology, and compared with a sensor which is adopted traditionally, the method does not need to use expensive precise instruments, and reduces the water quality monitoring cost.
Preferably, the analytical calculation in step (3) is based on digital image colorimetric principle or hyperspectral technology.
In the invention, the analysis and calculation based on the digital image colorimetric principle needs an image acquisition device consisting of a camera and an LED lamp, and an RGB (red, green and blue) model in image processing software is adopted to process the acquired image so as to convert visual colors into processable data. And acquiring photos of a large number of heavy metal wastewater samples of different types and different concentrations at the early stage, selecting an RGB (red, green and blue) mode by using image processing software to read R, G, B three-channel data of the image, performing data processing, and establishing a data processing model. In the water quality monitoring process, the RGB mode data of the sample photo is substituted into the data processing model, and the corresponding heavy metal content in the water sample can be obtained.
According to the invention, the analysis and calculation based on the hyperspectral technology needs an image acquisition device consisting of a hyperspectral spectrometer and an LED lamp, the hyperspectral spectrometer is used for acquiring the spectra of a large number of wastewater samples in the early stage to obtain a spectral curve, then the hyperspectral data is preprocessed, the spectral characteristics of the water body are analyzed, a characteristic wave band is selected, and an inversion model of the optimal heavy metal content in the water body is constructed. In the water quality monitoring process, the hyperspectral data of the water sample are substituted into the inversion model, and the corresponding heavy metal content in the water sample can be obtained.
Preferably, the comparison result in the step (4) is divided into 'water quality is not exceeded' and 'water quality is exceeded'.
And when the comparison result shows that the water quality does not exceed the standard, controlling the heavy metal wastewater to flow to the regulating tank subsequently.
And when the comparison result indicates that the water quality exceeds the standard, controlling the heavy metal wastewater to subsequently flow to the accident pool, and starting an alarm state.
According to the invention, the subsequent flow direction of the heavy metal wastewater is realized through the control device, when the water quality monitoring data is within the allowable range of the corresponding index, namely the comparison result indicates that the water quality does not exceed the standard, the PLC controls the water sample temporary storage tank to empty the water sample, and simultaneously controls the pipeline valve of the wastewater entering the corresponding regulating tank to be opened and the pipeline valve entering the accident tank to be closed, so that the wastewater enters the corresponding regulating tank; if the water quality exceeds the allowable range value, namely the comparison result is that the water quality exceeds the standard, the PLC controls the pipeline valve of the wastewater entering the corresponding regulating tank to be closed, the pipeline valve entering the accident tank to be opened, so that the wastewater enters the accident tank, and simultaneously controls the alarm device to start the alarm state so as to prompt a manager to perform corresponding treatment.
Preferably, the comparison result in the step (4) is stored in a cloud platform, and the user logs in and checks the comparison result through a PC terminal or a mobile terminal.
Compared with the prior art, the invention has the following beneficial effects:
(1) the water quality monitoring system device provided by the invention realizes the integration of the Internet of things and the image analysis technology through the mutual matching of a plurality of devices with specific functions, achieves the purpose of quickly determining the contents of different heavy metals in the heavy metal wastewater inlet water, starts an alarm state for the overproof inlet water, furthest reduces the probability of the phenomenon that the pollutant emission concentration of heavy metal production enterprises exceeds the standard, improves the stability of process operation, standardizes the pollution discharge behavior of industrial park enterprises, improves the wastewater treatment efficiency, and overcomes the key problems of centralized treatment facilities in the industrial park;
(2) the non-contact automatic water quality monitoring method provided by the invention prevents the heavy metal water sample from harming human bodies, avoids errors of manual detection, and improves the safety and accuracy of monitoring; compared with the traditional sensor, the method does not need to use expensive precise instruments, and reduces the water quality monitoring cost.
Drawings
FIG. 1 is a schematic view of a system for monitoring water quality of heavy metal wastewater provided in example 1;
FIG. 2 is a schematic diagram of a system for monitoring water quality of heavy metal wastewater according to comparative example 1.
Wherein: 1-an automatic sampling device; 2-an image acquisition device; 3-data analysis and calculation device; 4-a control device; 5-a cloud platform; 6-valve means; 7-an alarm device; 8-a regulating tank; 9-a wastewater treatment system; 10-accident pool; 11-heavy metal ion detector.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments. It should be understood by those skilled in the art that the examples are only for the understanding of the present invention and should not be construed as the specific limitations of the present invention.
Example 1
The embodiment provides a water quality monitoring system device of heavy metal waste water, as shown in fig. 1, the water quality monitoring system device includes automatic sampling device 1, image acquisition device 2, data analysis and computing device 3, controlling means 4, valve device 6, alarm device 7 and cloud platform 5.
In this embodiment, the automatic sampling device 1 is used for temporarily storing a water sample of the heavy metal wastewater; the image acquisition device 2 is used for acquiring images of the water sample in the automatic sampling device 1; the data analysis and calculation device 3 is in communication connection with the image acquisition device 2; the control device 4 and the cloud platform 5 are respectively and independently in communication connection with the data analysis and calculation device 3; the automatic sampling device 1, the valve device 6 and the alarm device 7 are respectively and independently in communication connection with the control device 4.
In this embodiment, the image acquisition device 2 is suspended over the automatic sampling device 1 and moves along the x-axis, the y-axis or the z-axis during the image acquisition process; the control device 4 comprises a PLC controller; the cloud platform 5 is used for storing water quality monitoring data and generating a historical data curve.
Example 2
The embodiment provides a method for monitoring the water quality of heavy metal wastewater by using a water quality monitoring system device as shown in figure 1, which comprises the following steps:
(1) temporarily storing a water sample of the heavy metal wastewater by using an automatic sampling device 1, and carrying out image acquisition on the water sample by using an image acquisition device 2 to obtain a water sample image; the automatic sampling device 1 comprises 3 water sample temporary storage tanks which are mutually separated by adopting partition plates and are provided with top covers, and the inner walls of the water sample temporary storage tanks, the partition plates and the top covers are respectively and independently made of light-tight white polystyrene materials; the image acquisition device 2 comprises a camera and an LED lamp;
(2) performing image processing on the water sample image obtained in the step (1) by using a data analysis and calculation device 3 to obtain image information;
(3) analyzing and calculating the image information obtained in the step (2) based on a digital image colorimetric principle to obtain the content of heavy metals in the water sample;
(4) comparing the content of the heavy metal obtained in the step (3) with the content index range of the corresponding heavy metal, storing a comparison result, and controlling the subsequent flow direction of the heavy metal wastewater according to the comparison result; the comparison result is divided into 'water quality does not exceed the standard' and 'water quality exceeds the standard'; when the comparison result shows that the water quality does not exceed the standard, controlling the heavy metal wastewater to flow to the regulating tank 8 subsequently and enter the wastewater treatment system 9 subsequently; and when the comparison result indicates that the water quality exceeds the standard, controlling the heavy metal wastewater to subsequently flow to the accident pool 10, and starting an alarm state. And storing the comparison result to the cloud platform 5, and logging in and checking by a user through a PC (personal computer) end or a mobile end.
In this embodiment, the heavy metal elements of the heavy metal wastewater include copper, nickel, and chromium.
Example 3
The embodiment provides a method for monitoring the water quality of heavy metal wastewater by using a water quality monitoring system device as shown in figure 1, which comprises the following steps:
(1) temporarily storing a water sample of the heavy metal wastewater by using an automatic sampling device 1, and carrying out image acquisition on the water sample by using an image acquisition device 2 to obtain a water sample image; the automatic sampling device 1 comprises 4 water sample temporary storage grooves which are mutually separated by adopting a partition plate and are provided with top covers, and the inner walls of the water sample temporary storage grooves, the partition plate and the top covers are respectively and independently made of light-tight white polypropylene materials; the image acquisition device 2 comprises a high-resolution spectrometer and an LED lamp;
(2) performing image processing on the water sample image obtained in the step (1) by using a data analysis and calculation device 3 to obtain image information;
(3) analyzing and calculating the image information obtained in the step (2) based on a hyperspectral technology to obtain the content of heavy metals in the water sample;
(4) comparing the content of the heavy metal obtained in the step (3) with the content index range of the corresponding heavy metal, storing a comparison result, and controlling the subsequent flow direction of the heavy metal wastewater according to the comparison result; the comparison result is divided into 'water quality does not exceed the standard' and 'water quality exceeds the standard'; when the comparison result shows that the water quality does not exceed the standard, controlling the heavy metal wastewater to flow to the regulating tank 8 subsequently and enter the wastewater treatment system 9 subsequently; and when the comparison result indicates that the water quality exceeds the standard, controlling the heavy metal wastewater to subsequently flow to the accident pool 10, and starting an alarm state. And storing the comparison result to the cloud platform 5, and logging in and checking by a user through a PC (personal computer) end or a mobile end.
In this embodiment, the heavy metal elements of the heavy metal wastewater include manganese, iron, cadmium, and cobalt.
Example 4
The embodiment provides a method for monitoring the water quality of heavy metal wastewater by using a water quality monitoring system device as shown in figure 1, which comprises the following steps:
(1) temporarily storing a water sample of the heavy metal wastewater by using an automatic sampling device 1, and carrying out image acquisition on the water sample by using an image acquisition device 2 to obtain a water sample image; the automatic sampling device 1 comprises 2 water sample temporary storage tanks which are mutually separated by adopting a partition plate and are provided with top covers, and the inner walls of the water sample temporary storage tanks, the partition plate and the top covers are respectively and independently made of light-tight white polystyrene materials; the image acquisition device 2 comprises a high-resolution spectrometer and an LED lamp;
(2) performing image processing on the water sample image obtained in the step (1) by using a data analysis and calculation device 3 to obtain image information;
(3) analyzing and calculating the image information obtained in the step (2) based on a hyperspectral technology to obtain the content of heavy metals in the water sample;
(4) comparing the content of the heavy metal obtained in the step (3) with the content index range of the corresponding heavy metal, storing a comparison result, and controlling the subsequent flow direction of the heavy metal wastewater according to the comparison result; the comparison result is divided into 'water quality does not exceed the standard' and 'water quality exceeds the standard'; when the comparison result shows that the water quality does not exceed the standard, controlling the heavy metal wastewater to flow to the regulating tank 8 subsequently and enter the wastewater treatment system 9 subsequently; and when the comparison result indicates that the water quality exceeds the standard, controlling the heavy metal wastewater to subsequently flow to the accident pool 10, and starting an alarm state. And storing the comparison result to the cloud platform 5, and logging in and checking by a user through a PC (personal computer) end or a mobile end.
In this embodiment, the heavy metal elements of the heavy metal wastewater include copper and cobalt.
Comparative example 1
This comparative example provides a water quality monitoring system device of heavy metal waste water, as shown in fig. 2, water quality monitoring system device includes automatic sampling device 1, heavy metal ion detector 11, controlling means 4, valve device 6, alarm device 7 and cloud platform 5.
In the comparative example, the automatic sampling device 1 is used for temporarily storing the water sample of the heavy metal wastewater; the heavy metal ion detector 11 is used for carrying out on-line detection on heavy metal ions in the water sample in the automatic sampling device 1; the control device 4 and the cloud platform 5 are respectively and independently in communication connection with the heavy metal ion detector 11; the automatic sampling device 1, the valve device 6 and the alarm device 7 are respectively and independently in communication connection with the control device 4.
Compared with the embodiment 1, the water quality monitoring system device provided by the comparative example needs to utilize the heavy metal ion detector 11, on one hand, the heavy metal ions are easily interfered by other ions in the monitoring process, so that the monitoring result is inaccurate, on the other hand, the precision instrument is expensive, and the water quality monitoring cost is improved.
Therefore, the water quality monitoring system device provided by the invention realizes the integration of the Internet of things and the image analysis technology through the mutual matching of a plurality of devices with specific functions, achieves the purpose of quickly determining the contents of different heavy metals in the heavy metal wastewater inlet water, starts an alarm state for the over-standard inlet water, reduces the probability of the over-standard phenomenon of the pollutant emission concentration of heavy metal production enterprises to the maximum extent, improves the stability of process operation, standardizes the pollution discharge behavior of industrial park enterprises, improves the wastewater treatment efficiency, and overcomes the key problems of centralized treatment facilities in the industrial park; in addition, the non-contact automatic water quality monitoring method provided by the invention prevents the heavy metal water sample from harming human bodies, avoids errors of manual detection and improves the safety and accuracy of monitoring; compared with the traditional sensor, the method does not need to use expensive precise instruments, and reduces the water quality monitoring cost.
The applicant declares that the above description is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and it should be understood by those skilled in the art that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are within the scope and disclosure of the present invention.
Claims (10)
1. A water quality monitoring system device for heavy metal wastewater is characterized by comprising an automatic sampling device, an image acquisition device, a data analysis and calculation device, a control device, a valve device, an alarm device and a cloud platform;
the automatic sampling device is used for temporarily storing a water sample of the heavy metal wastewater;
the image acquisition device is used for acquiring images of a water sample in the automatic sampling device;
the data analysis and calculation device is in communication connection with the image acquisition device;
the control device and the cloud platform are respectively and independently in communication connection with the data analysis and computing device;
the automatic sampling device, the valve device and the alarm device are respectively and independently in communication connection with the control device.
2. The water quality monitoring system device according to claim 1, wherein the automatic sampling device comprises at least 2 water sample temporary storage tanks;
preferably, the at least 2 water sample temporary storage tanks are mutually separated by adopting a partition plate;
preferably, the at least 2 water sample temporary storage tanks are provided with top covers;
preferably, the inner walls, the partition plates and the top cover of the at least 2 water sample temporary storage tanks are made of opaque white materials respectively and independently.
3. The water quality monitoring system device according to claim 1 or 2, wherein the image acquisition device comprises an image acquisition device and an LED lamp;
preferably, the image collector comprises a camera or a hyperspectral spectrometer.
4. A water quality monitoring system apparatus according to any one of claims 1 to 3 wherein the image acquisition device is suspended directly above the automatic sampling device;
preferably, the image acquisition device moves along an x-axis, a y-axis or a z-axis during image acquisition.
5. A water quality monitoring system according to any one of claims 1 to 4 wherein the control means comprises a PLC controller.
6. The water quality monitoring system device according to any one of claims 1 to 5, wherein the cloud platform is configured to store water quality monitoring data and generate a historical data curve.
7. A method for monitoring the quality of heavy metal wastewater by using the water quality monitoring system device as claimed in any one of claims 1 to 6, wherein the method comprises the following steps:
(1) temporarily storing a water sample of the heavy metal wastewater, and carrying out image acquisition on the water sample to obtain a water sample image;
(2) performing image processing on the water sample image obtained in the step (1) to obtain image information;
(3) analyzing and calculating the image information obtained in the step (2) to obtain the content of heavy metals in the water sample;
(4) comparing the content of the heavy metal obtained in the step (3) with the content index range of the corresponding heavy metal, storing a comparison result, and controlling the subsequent flow direction of the heavy metal wastewater according to the comparison result;
wherein, the heavy metal elements of the heavy metal wastewater comprise any one or the combination of at least two of copper, nickel, chromium, manganese, iron, cadmium or cobalt.
8. The method of claim 7, wherein the analytical computation of step (3) is based on digital image colorimetric principles or hyperspectral techniques.
9. The method according to claim 7 or 8, wherein the comparison result in the step (4) is divided into 'water quality is not exceeded' and 'water quality is exceeded';
when the comparison result shows that the water quality does not exceed the standard, controlling the heavy metal wastewater to flow to the regulating tank subsequently;
and when the comparison result indicates that the water quality exceeds the standard, controlling the heavy metal wastewater to subsequently flow to the accident pool, and starting an alarm state.
10. The method according to any one of claims 7 to 9, wherein the comparison result of step (4) is stored in a cloud platform, and a user logs in and views the comparison result through a PC side or a mobile side.
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