A chemical oxygen demand detection device

Abstract

The present invention discloses a chemical oxygen demand detection device, including a reagent package supply module, a detection solution supply module, a reaction module, an image recognition module and a detection control module; the reagent package supply module is electrically connected to the detection control module, and is used to supply the reagent package to the reaction module according to the control signal of the detection control module; the detection solution supply module is electrically connected to the detection control module, and is used to supply the detection solution to the reaction module according to the control signal of the detection control module; the image recognition module is arranged in the reaction module and the image recognition module is electrically connected to the detection control module, and is used to send the image information of the reagent package after the reagent package reacts with the detection solution to the detection control module; the detection control module is used to determine the chemical oxygen demand of the detection solution according to the image information. The present invention solves the problems of high cost of chemical oxygen demand detection equipment, high cost of single detection, strict requirements on installation environment and long time to detect results in the prior art.

Description

Technical Field

[0001] The embodiment of the present invention relates to sewage online detection technology, and in particular to a chemical oxygen demand detection device. Background Art

[0002] The Chemical Oxygen Demand (COD) index is an important and must-be-tested index in wastewater discharge standards. At the same time, in environmental sampling and testing, COD is also a necessary indicator for determining whether wastewater discharge meets standards.

[0003] At present, the detection of COD indicators on the market is divided into two modes: online instrument measurement and laboratory manual measurement. The COD online detection equipment on the market has complex structure, strict requirements on the installation environment, long detection time, high equipment cost and high detection cost. It is not suitable for villages or small sewage treatment facilities. Manual measurement in the laboratory must be equipped with laboratory personnel, and samples must be taken manually on site. The measurement process is cumbersome, the test results cannot be obtained quickly, and the entire test result time is too long.

[0004] Based on the existing COD detection technology, these two detection modes cannot solve the problem of installing a COD online detection device commonly used on the market in village or small sewage treatment equipment due to factors such as high equipment cost, high single detection cost, strict installation environment requirements, and long detection time. Summary of the invention

[0005] In view of this, an embodiment of the present invention provides a chemical oxygen demand detection device to solve the problems of high cost, high cost per single detection, strict requirements on the installation environment and long detection time of existing chemical oxygen demand detection equipment.

[0006] An embodiment of the present invention provides a chemical oxygen demand detection device, comprising:

[0007] A medicine package supply module, a detection solution supply module, a reaction module, an image recognition module and a detection control module;

[0008] The medicine package supply module is electrically connected to the detection control module and is used to supply the medicine package to the reaction module according to the control signal of the detection control module;

[0009] The detection solution supply module is electrically connected to the detection control module, and is used to supply the detection solution to the reaction module according to the control signal of the detection control module;

[0010] The image recognition module is disposed in the reaction module and is electrically connected to the detection control module, and is used to send image information of the medicine package after the medicine package reacts with the detection solution to the detection control module;

[0011] The detection control module is used to determine the chemical oxygen demand of the detection solution according to the image information.

[0012] Optionally, the detection control module includes an image information and chemical oxygen demand corresponding unit, a logic operation unit and an update unit, wherein the image information and chemical oxygen demand corresponding unit, the logic operation unit and the update unit are connected in pairs, and the image information and chemical oxygen demand corresponding unit stores a corresponding relationship between the image information and the chemical oxygen demand;

[0013] The image information and chemical oxygen demand correspondence unit is used to directly determine the chemical oxygen demand of the detection solution according to the image information;

[0014] Alternatively, the logic operation unit is used to calculate the chemical oxygen demand of the detection solution according to the image information and the corresponding relationship between the image information and the chemical oxygen demand;

[0015] The updating unit is used to update the corresponding relationship between the image information and the chemical oxygen demand according to the image information and the chemical oxygen demand calculated by the logic operation unit.

[0016] Optionally, the reaction module is electrically connected to the detection control module, and is used to control the reaction between the drug package and the detection solution according to a control signal of the detection control module.

[0017] Optionally, the detection control module includes a circuit board unit and a solenoid valve unit, and the solenoid valve unit includes a first solenoid valve, a second solenoid valve, a third solenoid valve and a fourth solenoid valve;

[0018] The first solenoid valve is pneumatically connected to the medicine package supply module;

[0019] The second solenoid valve and the third solenoid valve are both pneumatically connected to the detection solution supply module;

[0020] The fourth solenoid valve is pneumatically connected to the reaction module.

[0021] Optionally, the medicine package supply module includes a forward reset cylinder, a medicine package mounting frame and a spring push plate;

[0022] The medicine package installation rack includes a medicine package installation cavity, and a plurality of medicine packages can be installed in the medicine package installation cavity;

[0023] The spring propulsion plate is disposed at one side of the medicine pack installation cavity, and is used to propel the medicine pack to move in the medicine pack installation cavity along a first direction;

[0024] The forward reset cylinder is in communication with the medicine package installation cavity and is used to push the medicine package to the reaction module along a second direction; the second direction intersects with the first direction;

[0025] The first solenoid valve is pneumatically connected to the forward reset cylinder and is used to control the forward reset cylinder to propel the medicine package to the reaction module.

[0026] Optionally, the detection solution supply module includes a sampling pump, a solution injection cylinder and a solution injection tube;

[0027] The sampling pump is connected to the solution injection cylinder through a solution conducting pipe, and is used to transfer the detection solution to the solution injection cylinder;

[0028] The second solenoid valve is pneumatically connected to the solution injection cylinder, which is connected to the solution injection barrel, and the second solenoid valve is used to control the solution injection cylinder to push the barrel to move to the reaction module;

[0029] The third solenoid valve is pneumatically connected to the solution injection cylinder and is used to control the injection cylinder to inject the detection solution into the reaction module.

[0030] Optionally, the reaction module includes a rotating cylinder and a medicine package shaking box;

[0031] Wherein, the medicine package shaking box is used to place the medicine package;

[0032] The fourth solenoid valve is pneumatically connected to the rotary cylinder and is used to control the rotary cylinder to drive the medicine package shaking box to rotate so that the medicine package reacts with the detection solution.

[0033] Optionally, the chemical oxygen demand detection device further includes a temperature detection module and a water tank for the solution to be detected;

[0034] The temperature detection module includes a temperature sensing probe, one end of which extends into the water tank of the solution to be detected, and the other end of which is in communication connection with the detection control module, for transmitting the temperature information of the solution to be detected to the detection control module;

[0035] The detection control module is also used to automatically adjust the reaction time between the detection solution and the medicine package according to the detected temperature information, and control the image recognition module to collect image information of the medicine package.

[0036] Optionally, the chemical oxygen demand detection device further includes a remote control module, and the remote control module is communicatively connected to the detection control module.

[0037] Optionally, the chemical oxygen demand detection device further includes a shell, and the drug package supply module, the detection solution supply module, the reaction module, the image recognition module and the detection control module are all arranged in the shell.

[0038] The embodiment of the present invention discloses a chemical oxygen demand detection device, including a reagent bag supply module, a detection solution supply module, a reaction module, an image recognition module and a detection control module; the reagent bag supply module is electrically connected to the detection control module, and is used to supply the reagent bag to the reaction module according to the control signal of the control module; the detection solution supply module is electrically connected to the detection control module, and is used to supply the detection solution to the reaction module according to the control signal of the control module; the image recognition module is arranged in the reaction module and the image recognition module is electrically connected to the detection control module, and is used to send the image information of the reagent bag after the reagent bag reacts with the detection solution to the detection control module; the detection control module is used to determine the chemical oxygen demand of the detection solution according to the image information. The problems of high cost, high single detection cost, strict installation environment requirements and long detection time of the existing COD detection equipment are solved, and the cost of COD detection equipment and single detection cost are reduced, so that it can be widely used in simple sewage treatment equipment or sewage treatment facilities with low construction cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0040] Figure 1 is a schematic diagram of a chemical oxygen demand detection device in an embodiment of the present invention;

[0041] Figure 2 is a structural schematic diagram of a detection control module in an embodiment of the present invention;

[0042] Figure 3 It is a schematic diagram of another chemical oxygen demand detection device in an embodiment of the present invention;

[0043] Figure 4 It is a structural schematic diagram of another chemical oxygen demand detection device in an embodiment of the present invention; DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be fully described below in combination with the drawings in the embodiments of the present invention through specific implementation methods. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work fall within the protection scope of the present invention.

[0045] Embodiment 1

[0046] Figure 1 This is a schematic diagram of a chemical oxygen demand detection device provided in Example 1 of the present invention. This embodiment can be applied to the situation of village or small-scale sewage treatment. Figure 1 A chemical oxygen demand detection device includes a reagent package supply module 1, a detection solution supply module 2, a reaction module 3, an image recognition module 4 and a detection control module 5; the reagent package supply module 1 is electrically connected to the detection control module 5, and is used to supply the reagent package to the reaction module 3 according to the control signal of the detection control module 5; the detection solution supply module 2 is electrically connected to the detection control module 5, and is used to supply the detection solution to the reaction module 3 according to the control signal of the detection control module 5; the image recognition module 4 is arranged in the reaction module 3 and the image recognition module 4 is electrically connected to the detection control module 5, and is used to send the image information of the reagent package after the reagent package reacts with the detection solution to the detection control module 5; the detection control module 5 is used to determine the chemical oxygen demand of the detection solution according to the image information.

[0047] Exemplarily, the control module 5 of the device can be a circuit board with a control circuit, which controls the reagent package supply module 1 to supply the reagent package to the reaction module 3 by outputting a control signal, and controls the detection solution supply module 2 to supply the detection liquid to the reaction module 3 by outputting a control signal, so that the reagent package and the detection liquid can react in the reaction module 3. The reagent package supply module 3 stores and supplies the reagent package, and the reagent package can be a COD rapid test package commonly used in the market. For example, the cost of each measurement of the reagent package is 8 yuan, plus other auxiliary costs of 1 yuan, and the cost of each measurement is less than 10 yuan. The measuring reagent is a common product, which is convenient to purchase at any time, ensuring low cost of a single test. When the medicine package and the detection solution react chemically in the reaction module 3, the medicine package contains oxidizing chemical substances, which react with the reducing substances in the detection solution to undergo a redox reaction. The color of the colored area on the surface of the medicine package will change color according to the reaction amount of the internal oxidizing substance. After the chemical reaction is completed, the detection control module 5 outputs a control signal to control the image recognition module 4 to capture and obtain image information of the colored area of ​​the medicine package. At the same time, the image recognition module 4 converts the image information into an electrical signal and transmits it to the detection control module 5. The detection control module 5 retrieves the internal stored data according to the corresponding relationship between the preset image information and the chemical oxygen demand, and determines the chemical oxygen demand of the detection solution in a short time through comparative analysis. The single detection time is short, thereby achieving the purpose of rapid detection.

[0048] In summary, the chemical oxygen demand detection device provided in the embodiment of the present invention automatically controls the entire detection reaction process and determines the chemical oxygen demand of the solution through the detection control module. The device is simple, low in construction cost and easy to install. The detection reagent package used is low in price and easy to replace. It has the advantage of low cost per single detection and can better meet the actual use needs of villages or small sewage treatment equipment.

[0049] Based on the above embodiment, how the detection control module determines the chemical oxygen demand of the detection solution is described below.

[0050] As a feasible embodiment, Figure 2 is a structural diagram of a detection control module in an embodiment of the present invention, Figure 2 Yes Figure 1 Further refinement of the detection control module 5. Figure 2The detection control module 5 includes an image information and chemical oxygen demand corresponding unit 51, a logic operation unit 52 and an updating unit 53. The image information and chemical oxygen demand corresponding unit 51, the logic operation unit 52 and the updating unit 53 are connected in pairs. The image information and chemical oxygen demand corresponding unit 51 stores the corresponding relationship between the image information and the chemical oxygen demand; the image information and chemical oxygen demand corresponding unit 51 is used to directly determine the chemical oxygen demand of the detection solution according to the image information; or the logic operation unit 52 is used to calculate the chemical oxygen demand of the detection solution according to the image information and the corresponding relationship between the image information and the chemical oxygen demand; the updating unit 53 is used to update the corresponding relationship between the image information and the chemical oxygen demand according to the image information and the chemical oxygen demand calculated by the logic operation unit 52.

[0051] For example, refer to Figure 2 The image information and chemical oxygen demand correspondence unit 51 stores a storage database of the correspondence between image information and chemical oxygen demand. The image information includes RGB values ​​of the three color channels of red, green and blue. It should be noted that the storage database in this embodiment uses machine autonomous learning and big data analysis technology to analyze a large number of image RGB values ​​and COD values ​​to obtain the mathematical model correspondence between image information and chemical oxygen demand. Exemplarily, the detection control module 5 works according to the following method. The image recognition module 4 collects the image information of the medicine package after the reaction between the medicine package and the detection solution and sends it to the detection control module 5. The detection control module 5 receives the image information of the medicine package. The image information and chemical oxygen demand correspondence unit 51 in the detection control unit 5 compares and analyzes the received image information of the medicine package with the picture information storage database. If the image information of the medicine package matches the storage database, the image information and chemical oxygen demand correspondence unit 51 directly confirms and outputs the chemical oxygen demand value of the detection solution according to the correspondence. Value A; if the image information of the medicine package does not match the built-in image information, the logic operation unit 52 is started, and the logic operation unit 52 recalculates and analyzes the image information of the medicine package according to the preset image information and chemical oxygen demand correspondence to obtain the chemical oxygen demand of the detection solution, and outputs the chemical oxygen demand value B of the detection solution; at the same time, the update unit 53 is automatically started, and the update unit 53 inputs the chemical oxygen demand value B of the detection solution calculated and analyzed by the logic operation unit 52 into the image information and chemical oxygen demand correspondence unit 51 for storage, and updates the image information and chemical oxygen demand correspondence database. In the stored image information-chemical oxygen demand mathematical model correspondence database, as the number of comparisons increases, the update unit 53 gradually stores and updates the image information and chemical oxygen demand mathematical model correspondence database. Therefore, the detection method not only gives the current detection result, but also provides an updated correspondence database for subsequent detection, which greatly improves the detection rate of the detection device and the accuracy of the detection result.

[0052] Optional, continue to refer to Figure 1 As shown, the reaction module 3 is electrically connected to the detection control module 5 , and is used to control the reaction between the drug package and the detection solution according to the control signal of the detection control module 5 .

[0053] In order to further achieve full and complete reaction between the drug package and the detection solution, a mechanical shaking device can be pre-installed in the reaction module 3 to achieve full mixing, thereby ensuring that the drug package and the detection solution fully react in the reaction module 3, ensuring that the image recognized by the image recognition module 4 is the image information after the drug package has fully reacted, and ensuring that the chemical oxygen demand detection of the detection solution is highly accurate.

[0054] As a feasible embodiment, the chemical oxygen demand detection device also includes a temperature detection module and a water tank for the solution to be detected (not shown in the figure); the temperature detection module includes a temperature sensing probe, one end of the temperature sensing probe extends into the water tank for the solution to be detected to contact the detection solution, and the other end is communicatively connected to the detection control module 5, and is used to transmit the temperature information of the solution to be detected to the detection control module 5; the detection control module 5 is also used to automatically adjust the reaction time between the detection solution and the medicine package according to the detected temperature information, and control the image recognition module 4 to collect image information of the medicine package.

[0055] Exemplarily, the temperature detection module includes a temperature sensing probe, one end of which extends into the water tank of the solution to be detected to measure the temperature t of the detection solution, and transmits the detected temperature t to the detection control module 5. Before the detection control module 5 controls the reaction module 3 to supply the detection solution, the detection control module 5 automatically adjusts the reaction time T between the detection solution and the medicine package according to the detected temperature information. After the reaction time T between the solution to be detected and the medicine package ends, the detection control module 5 controls the image recognition module 4 to collect the image information of the medicine package after the reaction with the detection solution. It should be noted that the temperature of the detection solution affects the reaction time. The reaction time is different for different detection solution temperatures, and the RGB values ​​of the image information of the medicine package are different. In this embodiment, after a large number of detection tests in the early stage, the mathematical model correspondence between the temperature t of the detection solution and the reaction time T is obtained. The reaction time is set to y, and the temperature value of the detection solution is x. The corresponding relationship between the temperature and the reaction time set by the solution temperature value detected by the detection module is:

[0056] (y=-1.4x+600, y is the reaction time, in seconds (s); x is the temperature value, in degrees Celsius (℃), such as: when the detection solution temperature is 0°, the reaction time is set to 600s; when the solution temperature is 25°, the reaction time is set to 566s. The corresponding relationship given here is only an illustrative example.

[0057] Specifically, the image recognition module 4 in this embodiment is disposed in the reaction module 3 and is electrically connected to the detection control module 5. Exemplarily, the image recognition module 4 may be a color recognition sensor, including a sensor probe, an LED light source, and a signal analysis circuit (not shown in the figure). The size of the color recognition sensor is 1mm x 1mm x1mm, which is a micro sensor. The sensor sensing probe can identify and capture the image information of the medicine package after the medicine package reacts with the detection solution within a distance of 5 mm from the medicine package, and the image information includes RGB values ​​of the three color channels of red, green and blue; when it is necessary to obtain the image information, the detection control module 5 outputs a control signal to control the image recognition module 4 to turn on the LED light source, and the LED light source is irradiated on the medicine package, and the sensor sensing probe obtains the reflected light information on the surface of the medicine package after the medicine package reacts with the detection solution, and the reflected light information is the picture information of the surface of the medicine package, wherein the sensor sensing probe continuously obtains the reflected light information at least three times, thereby avoiding errors caused by environmental factors, and the signal analysis circuit converts the reflected light information into an electrical signal through a preset logical operation analysis, and transmits it to the detection control module 5, and the detection control module 5 compares and analyzes the preset image information and the mathematical model relationship of the chemical oxygen demand to determine the chemical oxygen demand of the detection solution, and the whole detection time is completed in about 10 minutes, and the next measurement can be carried out according to the above process. The detection time of this scheme is short, and the purpose of rapid detection can be achieved.

[0058] As a feasible embodiment, Figure 3 Schematic diagram of another chemical oxygen demand detection device in an embodiment of the present invention; Figure 3 The chemical oxygen demand detection device also includes a remote control module 6, which is connected to the detection control module 5 in communication. The chemical oxygen demand detection device has an electrical interface connected to an external device, and the external device can be connected to it via RS-485 or analog signals, switch signals. Exemplarily, in this embodiment, the remote control module 6 can be connected to the detection control module 5 in communication using RS-485 electrical communication wiring or analog signals, switch signal wiring. The device supports slave station communication of the simple or standard Modbus RTU communication protocol, and the local slave station address can be set, so that the remote control module 6 can remotely control each functional module of the device, and can remotely set the measurement process and parameters according to actual needs, and read the entire measurement process and measurement results.

[0059] Specifically, in villages or small-scale sewage treatment, when it is impossible to arrange detection personnel to go to the site for sampling in time, the staff issues control instructions to control the operation of the detection control module 5 by operating the remote control module 6. The detection control module 5 controls the device to start the detection program described in the above embodiment. The staff can grasp the treatment of sewage by the sewage treatment equipment in real time. The detection device meets the detection requirements of short measurement result time and high detection result accuracy. At the same time, the detection device has the advantages of low equipment cost and low single detection cost, has universal applicability, and can meet more practical application needs.

[0060] The chemical oxygen demand detection device of the present invention combines chemical reaction technology, mechanical automation technology, image recognition detection and signal extraction analysis and processing technology, mathematical modeling and big data storage comparative analysis technology to determine the chemical oxygen demand of the detection solution. The device has the competitive advantages of reducing detection costs and improving detection efficiency.

[0061] Embodiment 2

[0062] As a feasible embodiment, Figure 4 This is a schematic diagram of the structure of another chemical oxygen demand detection device in an embodiment of the present invention, referring to Figure 4 The detection control module 5 includes a circuit board unit 54 and a solenoid valve unit 55, and the solenoid valve unit includes a first solenoid valve 551, a second solenoid valve 555, a third solenoid valve 553 and a fourth solenoid valve 554; the first solenoid valve 554 is pneumatically connected to the medicine package supply module 1; the second solenoid valve 552 and the third solenoid valve 553 are both pneumatically connected to the detection solution supply module 3; the fourth solenoid valve 554 is pneumatically connected to the reaction module 3.

[0063] In this embodiment, the circuit board unit 54 outputs a control signal to control the solenoid valve unit 55 by being electrically connected to the solenoid valve 55. The first solenoid valve 554 drives the medicine package supply 1 to supply the medicine package; the second solenoid valve 552 and the third solenoid valve 553 drive the detection solution supply module 3 to supply the detection solution; the fourth solenoid valve 554 drives the medicine package in the reaction unit 3 to react with the solution, thereby performing a mechanical automation detection process.

[0064] Optionally, the medicine package supply module 1 includes a forward reset cylinder 11, a medicine package mounting frame 12 and a spring propulsion plate 13; the medicine package mounting frame 12 includes a medicine package mounting cavity 121, in which multiple medicine packages can be installed; the spring propulsion plate 13 is arranged on one side of the medicine package mounting cavity 121, and is used to propel the medicine package in the mounting cavity 121 along a first direction; the forward reset cylinder 11 is connected to the medicine package mounting cavity 121, and is used to propel the medicine package to the reaction module 3 along a second direction; the second direction intersects with the first direction; the first solenoid valve 551 is pneumatically connected to the forward reset cylinder 11, and is used to control the forward reset cylinder 11 to propel the medicine package to the reaction module 3.

[0065] For details, please refer to Figure 4 , the first direction is the direction indicated by arrow a in the figure, and the second direction is the direction indicated by arrow b in the figure. The medicine package is pre-placed in the medicine package installation cavity 121, and the spring push plate 13 presses the medicine package through the spring elastic force, and the medicine package is moved along the first direction in the medicine package installation frame to the intersection of the second direction and the first direction. The first solenoid valve 551 is pneumatically connected to the forward reset cylinder 11 (not shown in the figure), and the first solenoid valve 551 drives the forward reset cylinder 11 through electricity to push the medicine package to the reaction module 3 along the second direction, and the medicine package waits to react with the detection solution.

[0066] Optionally, the detection solution supply module 2 includes a sampling pump 21, a solution injection cylinder 22 and a solution injection barrel 23; the sampling pump 21 is connected to the solution injection barrel 23 through a solution conducting pipe 221, and is used to transmit the detection solution to the solution injection barrel 23; the second solenoid valve 552 is pneumatically connected to the solution injection cylinder 22 (not shown in the figure), the solution injection cylinder 22 is connected to the solution injection barrel 23, and the second solenoid valve 552 is used to control the solution injection cylinder 22 to push the solution injection barrel 23 to move to the reaction module 3; the third solenoid valve 553 is pneumatically connected to the solution injection barrel 23, and is used to control the solution injection barrel 23 to inject the detection solution into the reaction module 3.

[0067] Specifically, in this embodiment, the detection control module 5 controls the sampling pump 21 to electrically extract the detection solution. The sampling pump is pre-set to electrically extract and empty the detection solution at least 3 times to clean the residual solution in the solution conducting pipe 221 and the solution injection cylinder 23 to avoid interference with this detection. After the cleaning is completed, the sampling pump 21 continues to inject the detection solution into the solution injection cylinder 23 through the solution conducting pipe 221, and the second solenoid valve 552 drives the solution injection cylinder 22 by electricity to push the solution injection cylinder 23 to move to the reaction module 3. The third solenoid valve 553 drives the solution injection cylinder 23 by electricity to inject the detection solution into the reaction unit, and the reaction between the reagent package and the detection solution begins.

[0068] Optionally, the reaction module 3 includes a rotating cylinder 31 and a medicine package shaking box 32; wherein, the medicine package shaking box 32 is used to place the medicine package; the fourth solenoid valve 554 is pneumatically connected to the rotating cylinder 31 (not shown in the figure), which is used to control the rotating cylinder 31 to drive the medicine package shaking box 32 to rotate, so that the medicine package reacts with the detection solution.

[0069] Specifically, in this embodiment, the medicine package is placed in the medicine shaking box, and the fourth electromagnetic drive valve 554 electrically drives the rotating cylinder 31 to drive the medicine shaking box 32 to rotate according to the preset rotation requirements, and the rotating cylinder 31 determines the rotation time according to the reaction time between the detection solution and the medicine package. The medicine package shaking box 32 is a closed package, and two circular openings are hollowed out on both sides (not shown in the figure). The circular hole at one end corresponds to the solution injection cylinder 23 in the solution supply module 2, and the circular hole at this end is hollowed out; the circular hole at the other end corresponds to the image recognition module 4, and a transparent glass baffle is set outside the circular hole at this end. The transparent glass baffle is convenient to take and clear, and avoids splashing of the detection solution, which affects the accuracy of image acquisition.

[0070] Optionally, the chemical oxygen demand detection device further includes a housing 7, and the reagent package supply module 1, the detection solution supply module 2, the reaction module 3, the image recognition module 4 and the detection control module 5 are all arranged in the housing 7. Exemplarily, the housing 7 can be made of high-strength and corrosion-resistant stainless steel plates and aluminum alloys as the main support and fixing materials, which are used for the installation and protection of the entire chemical oxygen demand device. At the same time, a fully sealed structure is adopted to prevent external light from interfering with the measurement results, improve the accuracy of the image recognition module 4 in collecting and extracting image information, and further improve the accuracy of the entire device in determining the chemical oxygen demand. In this embodiment, the size of the housing W is 32cm×32cm×24.5cm. The device is small in size, easy to install and carry, and is convenient for on-site solution chemical oxygen demand detection. The shape of the housing 7 is not specifically limited here and can be adjusted according to the actual packaging.

[0071] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and the features of the various embodiments of the present invention may be partially or completely coupled or combined with each other, and may cooperate with each other in various ways and be technically driven. It is possible for those skilled in the art to make various obvious changes, readjustments, combinations and substitutions without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A chemical oxygen demand detection device, characterized in that: It includes a medicine package supply module, a detection solution supply module, a reaction module, an image recognition module and a detection control module; The medicine package supply module is electrically connected to the detection control module and is used to supply medicine packages to the reaction module according to the control signal of the control module; The detection solution supply module is electrically connected to the detection control module, and is used to supply the detection solution to the reaction module according to the control signal of the detection control module; The image recognition module is disposed in the reaction module and is electrically connected to the detection control module, and is used to send image information of the medicine package after the medicine package reacts with the detection solution to the detection control module; wherein the image recognition module is a color recognition sensor; The detection control module is used to determine the chemical oxygen demand of the detection solution according to the image information.

2. The chemical oxygen demand detection device according to claim 1, characterized in that: The detection control module includes an image information and chemical oxygen demand corresponding unit, a logic operation unit and an update unit, wherein the image information and chemical oxygen demand corresponding unit, the logic operation unit and the update unit are connected in pairs, and the image information and chemical oxygen demand corresponding unit stores the corresponding relationship between the image information and the chemical oxygen demand; The image information and chemical oxygen demand correspondence unit is used to directly determine the chemical oxygen demand of the detection solution according to the image information; Alternatively, the logic operation unit is used to calculate the chemical oxygen demand of the detection solution according to the image information and the corresponding relationship between the image information and the chemical oxygen demand; The updating unit is used to update the corresponding relationship between the image information and the chemical oxygen demand according to the image information and the chemical oxygen demand calculated by the logic operation unit.

3. The chemical oxygen demand detection device according to claim 1, characterized in that: The reaction module is electrically connected to the detection control module, and is used to control the reaction between the drug package and the detection solution according to a control signal of the detection control module.

4. The chemical oxygen demand detection device according to claim 3, characterized in that: The detection control module includes a circuit board unit and a solenoid valve unit, and the solenoid valve unit includes a first solenoid valve, a second solenoid valve, a third solenoid valve and a fourth solenoid valve; The first solenoid valve is pneumatically connected to the medicine package supply module; The second solenoid valve and the third solenoid valve are both pneumatically connected to the detection solution supply module; The fourth solenoid valve is pneumatically connected to the reaction module.

5. The chemical oxygen demand detection device according to claim 4, characterized in that: The medicine package supply module includes a forward reset cylinder, a medicine package mounting frame and a spring push plate; The medicine package installation rack includes a medicine package installation cavity, and a plurality of medicine packages can be installed in the medicine package installation cavity; The spring propulsion plate is disposed at one side of the medicine pack installation cavity, and is used to propel the medicine pack to move in the medicine pack installation cavity along a first direction; The forward reset cylinder is in communication with the medicine package installation cavity and is used to push the medicine package to the reaction module along a second direction; the second direction intersects with the first direction; The first solenoid valve is pneumatically connected to the forward reset cylinder and is used to control the forward reset cylinder to propel the medicine package to the reaction module.

6. The chemical oxygen demand detection device according to claim 4, characterized in that: The detection solution supply module includes a sampling pump, a solution injection cylinder and a solution injection tube; The sampling pump is connected to the solution injection cylinder through a solution conducting pipe, and is used to transfer the detection solution to the solution injection cylinder; The second solenoid valve is pneumatically connected to the solution injection cylinder, which is connected to the solution injection barrel, and the second solenoid valve is used to control the solution injection cylinder to push the barrel to move to the reaction module; The third solenoid valve is pneumatically connected to the solution injection cylinder and is used to control the injection cylinder to inject the detection solution into the reaction module.

7. The chemical oxygen demand detection device according to claim 4, characterized in that: The reaction module includes a rotating cylinder and a medicine package shaking box; Wherein, the medicine package shaking box is used to place the medicine package; The fourth solenoid valve is pneumatically connected to the rotary cylinder and is used to control the rotary cylinder to drive the medicine package shaking box to rotate so that the medicine package reacts with the detection solution.

8. The chemical oxygen demand detection device according to claim 1, characterized in that: The chemical oxygen demand detection device also includes a temperature detection module and a water tank for the solution to be detected; The temperature detection module includes a temperature sensing probe, one end of which extends into the water tank of the solution to be detected, and the other end of which is in communication connection with the detection control module, for transmitting the temperature information of the solution to be detected to the detection control module; The detection control module is also used to automatically adjust the reaction time between the detection solution and the medicine package according to the detected temperature information, and control the image recognition module to collect image information of the medicine package.

9. The chemical oxygen demand detection device according to claim 1, characterized in that: The chemical oxygen demand detection device also includes a remote control module, which is communicatively connected with the detection control module.

10. The chemical oxygen demand detection device according to claim 1, characterized in that: The chemical oxygen demand detection device further comprises a housing, and the medicine package supply module, the detection solution supply module, the reaction module, the image recognition module and the detection control module are all arranged in the housing.

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