Digestion system of sample, control method of digestion system and test system of sample

Abstract

The invention provides a sample digestion system, a control method thereof and a sample testing system, and relates to the field of sample testing, a sample is accommodated in a test tube, the digestion system comprises: a liquid injection assembly having a liquid injection station and used for injecting an acid liquid into the test tube located at the liquid injection station; the placing assembly is provided with a placing station, and the placing station is used for bearing test tubes containing acid liquor and samples; the recognition device is used for acquiring an image in the test tube, and the image can be used for determining whether the digestion of the sample is abnormal; and the transfer assembly is used for transferring the test tubes to the placement station. The digestion system can predict the digestion degree of the sample and improve the digestion degree of the sample in the test process based on the digestion degree of the sample.

Description

Technical Field

[0001] The invention relates to the field of sample testing, and in particular to a sample digestion system and a control method thereof, and a sample testing system. Background Art

[0002] Sample digestion refers to the process of removing interfering substances attached to the sample by acid, such as organic matter, dissolved particles and sample oxides, so as to remove the influence of interfering substances on the test in the subsequent test of the sample. The relevant digestion device cannot control the degree of sample digestion. Summary of the invention

[0003] The invention provides a sample digestion system and a control method thereof and a sample testing system, which are used to solve the technical problems of how to determine the digestion degree of a sample and how to improve the digestion degree of the sample during the testing process.

[0004] A first aspect of an embodiment of the present invention provides a sample digestion system, wherein the sample is contained in a test tube, and the digestion system includes: an injection component, having an injection station, and the injection component is used to inject acid into the test tube located at the injection station; a placement component, having a placement station, and the placement station is used to carry the test tube containing acid and the sample; an identification device, used to obtain an image in the test tube, and the image can be used to determine whether the digestion of the sample is abnormal; a transfer component, used to transfer the test tube to the placement station.

[0005] In some embodiments, the injection assembly includes: a moving table having the injection station; an injection device for injecting acid into a test tube located at the injection station; wherein the moving table can move relative to the injection device, the identification device is fixed to the bottom of the moving table, and the identification device is used to obtain an image of the test tube located at the injection station.

[0006] In some embodiments, the placement component also has an identification station, which is spaced apart from the placement station, and the identification device is used to obtain an image of the test tube at the identification station; the transfer component is also used to transfer the test tube between the identification station and the injection station.

[0007] In some embodiments, the placement assembly includes a turntable, and the identification station and the placement station are spaced apart around a rotation axis of the turntable.

[0008] In some embodiments, the digestion system further includes: a covering assembly for covering the test tube cover with the test tube located at the placement assembly, the test tube cover having a vent pipe; and an acid gas collection assembly connected to the vent pipe for condensing and collecting the acid gas.

[0009] A second aspect of an embodiment of the present invention provides a control method for a digestion system, which is applied to the digestion system provided in the first aspect embodiment above, and the control method includes: controlling the injection device to inject acid into a test tube located at the injection station; obtaining an image in the test tube by the recognition device, and predicting the degree of digestion of the sample after the digestion is completed based on the image; judging whether the degree of digestion of the sample is greater than a digestion threshold; if the degree of digestion is less than the digestion threshold, repeating the control of the injection device to inject acid into the test tube located at the injection station, obtaining an image in the test tube by the recognition device, and predicting the degree of digestion of the sample after the digestion is completed based on the image, and judging whether the degree of digestion of the sample is greater than the digestion threshold, until the number of times the injection component injects acid into the same test tube reaches a number threshold; if the degree of digestion of the sample is greater than the digestion threshold, controlling the transfer component to transfer the test tube to the placement station.

[0010] In some embodiments, the recognition device is fixed to the liquid injection device and can obtain an image of the test tube located at the liquid injection station. The obtaining of the image of the test tube by the recognition device includes: obtaining the image of the test tube located at the liquid injection station by the recognition device.

[0011] In some embodiments, the placement component also has an identification station, the identification device is fixed to the placement component and can obtain the image of the test tube located at the identification station, and the transfer component is also used to transfer the test tube between the injection station and the identification station; the acquisition of the image of the test tube by the identification device includes: controlling the transfer component to transfer the test tube to the identification station, and obtaining the image of the test tube located at the identification station by the identification device; between determining that the digestion degree is less than the digestion threshold and controlling the injection device to inject acid into the test tube at the injection station, the control method also includes: controlling the transfer component to transfer the test tube from the identification station to the injection station.

[0012] In some embodiments, controlling the injection component to re-inject acid into the test tube includes: controlling the injection component to inject acid with different degrees of corrosion into the test tube according to the number of times the injection component injects acid into the same test tube, wherein the degree of corrosion is positively correlated with the number of times the acid is re-injected.

[0013] A third aspect of an embodiment of the present invention provides a sample testing system, which includes: a weighing system for weighing samples; a temporary storage device for temporarily storing the weighed samples; a digestion system as described in the embodiment of the first aspect above, for digesting the samples; a color titration device for testing high-concentration samples after digestion; and an atomic absorption device for testing low-concentration samples after digestion.

[0014] The embodiment of the present invention provides a sample digestion system, wherein the sample is contained in a test tube, and the digestion system comprises: a liquid injection device having a liquid injection station and used for injecting acid into the test tube, a placement component having a placement station and used for carrying the test tube containing the acid and the sample, a recognition device for obtaining an image in the test tube, and a transfer component capable of transferring the test tube to a placement position; the recognition device can obtain an image of the sample in a preliminary digestion state, through which it can be predicted whether the sample can be completely digested after the digestion is completed, and only the sample that can be completely digested is transferred to the placement station, that is, by determining the digestion degree of the sample, only the sample that can be completely digested can enter the subsequent test process, thereby improving the digestion degree of the sample in the test process; moreover, in this embodiment, the digestion degree of the sample after the digestion is completed is predicted by obtaining an image of the preliminary digestion state of the sample, rather than obtaining an image of the sample in the digestion completion state after the digestion is completed; the main process of digestion occurs at the placement station, which reduces the long-term occupation of the liquid injection station and the recognition position by the sample in digestion, and accelerates the operation efficiency of the digestion system. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the structure of a digestion system for a first sample provided in an embodiment of the present invention;

[0016] Figure 2 A schematic diagram of the assembly of a liquid injection component and an identification device in a sample digestion system provided by an embodiment of the present invention;

[0017] Figure 3 A schematic diagram of the assembly of a moving platform and an identification device in a sample digestion system provided by an embodiment of the present invention;

[0018] Figure 4 A schematic diagram of the structure of a second sample digestion system provided in an embodiment of the present invention;

[0019] Figure 5 A schematic flow chart of a first control method for a digestion system provided by an embodiment of the present invention;

[0020] Figure 6 A schematic flow chart of a second method for controlling a digestion system provided by an embodiment of the present invention;

[0021] Figure 7 A schematic flow chart of a third method for controlling a digestion system provided by an embodiment of the present invention;

[0022] Figure 8 A schematic flow chart of a fourth method for controlling a digestion system provided by an embodiment of the present invention;

[0023] Fig. 9 A schematic diagram of the structure of a sample testing system provided in an embodiment of the present invention.

[0024] Description of Reference Numerals

[0025] 1. Digestion system; 2. Weighing system; 3. Temporary storage device; 4. Color titration device; 5. Atomic absorption device; 6. First transmission belt; 7. Constant volume instrument; 8. Bottle washing machine; 9. Second transmission belt;

[0026] 10. Liquid injection assembly; 11. Liquid injection station; 12. Moving table; 121. Receiving hole; 13. Liquid injection device; 20. Placement assembly; 21. Placement station; 22. Identification station; 23. Turntable; 30. Identification device; 31. Identification cavity; 32. Camera device; 33. Filling light device; 40. Transfer assembly. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] The various specific technical features in the various embodiments described in the specific implementation methods can be combined in various ways without contradiction. For example, different implementation methods can be formed by combining different specific technical features. In order to avoid unnecessary repetition, the various possible combinations of the specific technical features in the present invention will not be described separately.

[0029] It should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, only structures and / or processing steps closely related to the scheme of the present invention are shown in the drawings, while other details that are not closely related to the present invention are omitted.

[0030] In addition, it should be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the following description, the terms "first\second\..." involved are merely used to distinguish different objects, and do not indicate that the objects have the same or related points. It should be understood that the directions described by the directions nouns such as "above", "below", "inside" and "outside" involved are all directions in normal use.

[0031] In the following specific embodiments, the sample digestion system can be applied to digest any solid sample, such as coal ore, and the solid sample can be, for example, metal ore. For the sake of convenience, the digestion system is used to digest metal ore as an example to illustrate the structure and function of the digestion system, wherein the sample is contained in a test tube.

[0032] In some embodiments, Figure 1 As shown, the sample digestion system 1 comprises: a liquid injection component 10, a placement component 20, an identification device 30 and a transfer component 40. The liquid injection component 10 has a liquid injection station 11, and the liquid injection component 10 is used to inject acid into a test tube located at the liquid injection station 11, so as to digest the solid sample with the acid to eliminate the interfering substances in the solid sample.

[0033] The recognition device 30 is used to obtain an image inside the test tube, which is an image of the sample after preliminary digestion. Through this image, it can be predicted that the sample can be completely digested after the digestion is completed, that is, through this image, it can be predicted whether the sample can be completely digested. The specific method of prediction is described in the subsequent embodiments and will not be repeated here. Among them, according to the different positions where the recognition device 30 is set, the recognition device 30 can obtain images inside the test tube at different positions. Exemplarily, when the recognition device 30 is fixed to the injection component 10, the recognition device 30 can obtain the image inside the test tube at the injection station 11; Exemplarily, when the recognition device 30 is fixed to the placement component 20, and the placement component 20 is provided with an identification station, the recognition device 30 can obtain the image inside the test tube at the identification station.

[0034] The placement component 20 has a placement station 21, and the placement station 21 is used to carry a test tube containing acid and a solid sample. The transfer component 40 can transfer the test tube from the injection station 11 to the placement station 21. After the sample is determined to be able to be completely digested, the transfer component 40 transfers the test tube to the placement station 21, that is, after predicting that the sample can be completely digested based on the preliminary digestion state of the sample, the test tube is transferred to the placement station 21 so that the acid and the sample can further react. It can be understood that the digestion degree of the sample is obtained by prediction, so that only the sample that can be completely digested can enter the subsequent test process, and the sample that cannot be completely digested can enter the subsequent test process. The digested samples are reprocessed or excluded, thereby improving the digestion degree of the samples during the test; moreover, in this embodiment, the digestion degree of the samples after the digestion is completed is predicted by obtaining an image of the preliminary digestion state of the samples, rather than obtaining an image of the samples in the digestion completed state after the digestion is completed. The main digestion process occurs at the placement station 21, which provides sufficient time for the digestion reaction of the samples and reduces the long-term occupation of the injection station and the identification position by the samples being digested, so that the injection component 10 and the identification device 30 can inject and identify the next test tube containing the samples, thereby accelerating the operating efficiency of the digestion system.

[0035] The embodiment of the present invention provides a sample digestion system, wherein the sample is contained in a test tube, and the digestion system comprises: a liquid injection device having a liquid injection station and used for injecting acid into the test tube, a placement component having a placement station and used for carrying the test tube containing the acid and the sample, a recognition device for obtaining an image in the test tube, and a transfer component capable of transferring the test tube to a placement position; the recognition device can obtain an image of the sample in a preliminary digestion state, through which it can be predicted whether the sample can be completely digested after the digestion is completed, and only the sample that can be completely digested is transferred to the placement station, that is, by determining the digestion degree of the sample, only the sample that can be completely digested can enter the subsequent test process, thereby improving the digestion degree of the sample in the test process; moreover, in this embodiment, the digestion degree of the sample after the digestion is completed is predicted by obtaining an image of the preliminary digestion state of the sample, rather than obtaining an image of the sample in the digestion completion state after the digestion is completed; the main process of digestion occurs at the placement station, which reduces the long-term occupation of the liquid injection station and the recognition position by the sample in digestion, and accelerates the operation efficiency of the digestion system.

[0036] In some embodiments, Figure 2As shown, the liquid injection assembly 10 includes: a moving platform 12 and a liquid injection device 13, the moving platform 12 has a liquid injection station 11, and the liquid injection device 13 is used to inject acid into the test tube located at the liquid injection station, wherein the moving platform 12 can move relative to the liquid injection device 13, so that the liquid injection device 13 injects acid into different test tubes at the liquid injection station 11, and optionally, the liquid injection station 11 is used to carry a test tube rack, and the test tube rack accommodates multiple test tubes, and the liquid injection device 13 can inject acid into each test tube through the relative movement of the moving platform 12 and the liquid injection device 13. Acid; at the same time, the recognition device 30 is fixed to the bottom of the moving table 12, and the recognition device 30 moves with the moving table 12 so that the recognition device 30 can obtain the image of the test tube at the injection station 11. It can be understood that the recognition device 30 obtains the image at the injection station 11, and when it is predicted based on the image that the sample cannot be completely digested, the injection device 13 can be directly controlled to inject acid into the test tube containing the sample that cannot be completely digested again, saving the time required to transfer the test tube between the recognition position and the injection position.

[0037] Optional, such as Figure 3 As shown, the moving table 12 has a receiving hole 121, and the recognition device 30 and the bottom surface of the moving table 12 are surrounded to form a recognition cavity 31, and the recognition cavity 31 is connected to the receiving hole 121. The bottom of the test tube located at the recognition station 11 can pass through the receiving hole 121 and extend into the recognition cavity 31. The recognition device 30 also includes a camera device 32 located at the bottom of the recognition cavity 31. The camera device 32 can obtain the image of the test tube located in the recognition cavity 31 from the bottom of the test tube. Optionally, multiple test tubes can be accommodated in the recognition cavity 31 at the same time, and the camera device 32 can obtain images in multiple test tubes at the same time; optionally, the recognition device 30 also includes a fill light device 33, and the fill light device 33 can provide a light source to the recognition cavity 31 to make the image obtained by the camera device 32 clearer.

[0038] In some embodiments, Figure 4As shown, the placement component 20 also has an identification station 22, the placement station 21 and the identification station 22 are arranged at intervals, the identification device 30 is used to obtain the image in the test tube at the identification station 22, and the transfer component 40 is also used to transfer the test tube between the identification station 22 and the injection station 11. It can be understood that the identification position is set at the placement component 40, and after the injection component 10 injects liquid into the test tube, the test tube is transferred to the identification station 22 by the transfer component 40 and the image in the test tube at the identification station 22 is obtained by the identification device 30, so that the identification process will not affect the injection process, and when it is predicted by the image that the sample cannot be completely digested, the test tube is transferred to the injection station 11 again by the transfer component 40 and the injection component 10 is controlled to inject acid into the test tube again, and the test tube is transferred to the identification station 22 again by the transfer component 40, so as to obtain the image in the test tube again and determine whether the sample can be completely digested.

[0039] In some embodiments, Figure 4 As shown, the placement assembly 20 includes a turntable 23, and the identification station 22 and the placement station 21 are arranged at intervals around the rotation axis of the turntable 23. The relative positions of the positions of the identification station 22 and the placement station 21 and the injection station 11 can be adjusted by rotating the turntable 23. For example, the transfer assembly 40 can move between a first position and a second position, the injection station 11 is located at the first position, and the identification station 22 and the placement station 21 can reach the second position by rotating, so that the transfer assembly 40 can transfer the test tube between the injection station 11, the identification station 22 and the placement station 21. At the same time, the recognition device 30 is fixed to the turntable 23, so that the recognition device 30 can rotate with the turntable 23, and then the recognition device 30 can still obtain the image of the test tube in the recognition station when the turntable 23 rotates.

[0040] In some embodiments, the digestion system also includes: a covering assembly and an acid gas collection assembly, the covering assembly is used to cover the test tube cover with the test tube placed at the work station, and the test tube cover has an exhaust pipe connected to the internal space of the test tube, the acid gas collection assembly is connected to the exhaust pipe, and the acid gas in the test tube can enter the acid gas collection assembly through the exhaust pipe, and the acid gas collection assembly is used to condense the acid gas into acid liquid, thereby reducing the working pressure of the subsequent acid gas neutralization treatment device. Specifically, heat is generated during the reaction of the sample with the acid gas in the test tube, thereby causing the acid liquid in the test tube to evaporate into acid gas. If the evaporated acid gas directly enters the external environment, it may have an impact on the external environment, and the acid gas needs to be neutralized. However, if all the acid gas is directly introduced into the neutralization treatment device, the workload of the neutralization treatment device will be too heavy, resulting in a shortened service life of the neutralization treatment device. Condensing and recovering the acid gas through the acid gas recovery device can reduce the amount of acid gas that needs to be introduced into the neutralization treatment device, thereby reducing the workload of the neutralization treatment device.

[0041] The embodiment of the present invention also provides a control method for a digestion system, the control method is applied to the Figures 1 to 4 For the digestion system shown in any one of the figures, the execution subject of the control method can be the control unit of the digestion system itself, and the execution subject of the control method can also be an external control unit. For example, the digestion system is applied to a test system of the sample, and the control unit is the control unit of the test system. The specific steps of the control method are exemplarily described below in conjunction with the accompanying drawings.

[0042] In some embodiments, Figure 5 As shown, Figure 5 A schematic flow chart of a control method for a first digestion system provided by an embodiment of the present invention, the control method comprising:

[0043] Step S101, controlling the liquid injection component to inject acid into a test tube located at the liquid injection station.

[0044] That is, by injecting acid into the test tube, the acid digests the sample in the test tube.

[0045] Step S102: The recognition device acquires the image in the test tube and predicts the digestion degree of the sample after the digestion is completed according to the image.

[0046] It can be understood that when the sample is preliminarily digested by the acid, an image in the test tube is obtained by the recognition device, and the image is the state of the sample during the preliminary digestion. The digestion degree of the sample when the digestion is completed is predicted by the state of the sample during the preliminary digestion. The digestion system can predict the digestion degree of the sample when the digestion is completed in different ways. For example, the actual digestion degree of the sample is obtained through the image, and the actual contact time of the sample with the acid is obtained at the same time. The magnification factor is obtained by dividing the longest time for the digestion to be completed by the actual time. The actual digestion degree is multiplied by the magnification factor to obtain the estimated digestion degree. The estimated digestion degree can predict the digestion degree of the sample when the digestion is completed. For example, the prediction of the digestion degree of the sample can be achieved by training a complete neural network model. The training process of the neural network model is to train the sample image in the preliminary digestion state. The image is input into the neural network model to make the neural network model data predict the degree of digestion. The image is marked with the actual degree of digestion when the digestion is completed. The loss value is calculated based on the predicted degree of digestion and the actual degree of digestion. The weights and thresholds of each node in the neural network model are adjusted by the gradient descent method until the loss value reaches the minimum value. It is determined that the neural network model has completed a training. Different marked images are input into the neural network model for iterative training until the loss values ​​of the predicted degree of digestion and the actual degree of digestion output by the neural network model for multiple consecutive times are all less than the preset loss value threshold. It is then considered that the neural network model is fully trained. The image of the sample in the preliminary digestion state is input into the trained neural network model. The predicted degree of digestion output by the neural network model can realize the prediction of the degree of digestion of the sample after the digestion is completed.

[0047] The recognition device may directly obtain the image inside the test tube at the liquid injection station, or the test tube after the acid solution is injected may be transferred to a separate recognition station so that the recognition device obtains the image inside the test tube at the recognition station.

[0048] Step S103: determine whether the digestion degree of the sample is greater than the digestion threshold.

[0049] It can be understood that the digestion degree obtained in step S101 can determine whether the sample can be completely digested.

[0050] Step S104: If the digestion degree is less than the digestion threshold, repeat steps S101 to S103 until the number of times the liquid injection component injects acid into the same test tube reaches the number threshold.

[0051] It can be understood that when the digestion degree is less than the digestion threshold, it is expected that the sample cannot be completely digested. At this time, the acid is injected into the test tube again to try to digest the sample in the test tube again, and the image in the test tube is obtained again through the recognition device, so as to predict the digestion degree of the sample after the acid is injected again. If it is predicted that the sample still cannot be completely digested, the liquid is re-injected and the sample is tried to be digested; at the same time, if the number of re-injections reaches the number threshold, the attempt to digest the sample is stopped. Optionally, the digestion system also includes an alarm device. After the number of re-injections reaches the number threshold, the control method also includes controlling the digestion system to stop running and controlling the alarm device to output an alarm, so that the operator removes the sample that cannot be digested, so as to avoid the sample that cannot be digested occupying the workstation of the digestion system for a long time.

[0052] Step S105: If the digestion degree of the sample is greater than the digestion threshold, the transfer component is controlled to transfer the test tube to the placement station.

[0053] It can be understood that only samples predicted to be completely digested are transferred to the placement station, so that the samples continue to be digested at the placement station and enter the subsequent test process after being completely digested.

[0054] In some embodiments, the recognition device is fixed to the liquid injection device and is capable of acquiring an image of the inside of the test tube at the liquid injection station; Figure 6 As shown, Figure 6 A flow chart of a second method for controlling a digestion system provided by an embodiment of the present invention, and Figure 5 The control method shown is different in that Figure 5 Step S102 in the embodiment includes:

[0055] Step S201: The recognition device obtains an image of the inside of the test tube at the liquid injection station.

[0056] It can be understood that the identification device is directly fixed to the liquid injection device, and the image inside the test tube located at the liquid injection station is directly obtained through the liquid injection device, so that it is possible to predict whether the sample can be completely digested through the image, and when it is predicted that the sample cannot be completely digested, the acid can be directly injected into the test tube again through the liquid injection component without transferring the test tube.

[0057] In some embodiments, the placement component further has an identification station, the identification device is fixed to the placement component and can obtain an image of the test tube located at the identification station, and the transfer component is also used to transfer the test tube between the injection station and the identification station; Figure 7 As shown, Figure 7 A schematic diagram of a control method for a third digestion system provided by an embodiment of the present invention, and Figure 5 The control method shown is different in that Figure 5Step S102 in the embodiment includes:

[0058] Step S301: Control the transfer component to transfer the test tube to the identification station, and the identification device acquires the image inside the test tube at the identification station.

[0059] It can be understood that an identification station is set up outside the liquid filling station, and the test tube is transferred to the identification station through the transfer component after the liquid filling, so that the identification process can be carried out simultaneously with the liquid filling process. While the recognition device obtains the image inside the test tube at the recognition station, the liquid filling component can perform the liquid filling operation on the next test tube, thereby improving the working efficiency of the digestion system.

[0060] at the same time, Figure 5 Step S104 in the embodiment includes:

[0061] Step S302: If the digestion degree is less than the digestion threshold, control the transfer component to transfer the test tube from the identification station to the liquid injection station.

[0062] That is, after repeated liquid injection is completed, the transfer component is controlled to transfer the test tube to the identification station again, so that the identification device can obtain the image in the test tube again to predict the digestion degree of the sample again.

[0063] Step S303, repeating steps S302 to S103 until the number of times the liquid injection component injects acid into the same test tube reaches a threshold number.

[0064] Specifically, after executing step S302, execute steps S101 to S103, and repeat the above process until the number of times the liquid injection component injects acid into the same test tube reaches a threshold number.

[0065] Optionally, multiple test tubes are contained in a test tube rack, and the transfer component can realize the overall transfer of the multiple test tubes contained in the test tube rack by transferring the test tube rack as a whole. The transfer component can also transfer the test tubes contained in the test tube rack individually. Specifically, after acid is injected into each test tube contained in the test tube rack by the liquid injection component, the transfer component transfers the entire test tube rack from the liquid injection station to the identification station. When it is identified that the digestion degree of samples in some of the multiple test tubes contained in the test tube rack is less than the digestion threshold, for the sake of convenience, the test tube is referred to as an abnormal test tube, and the abnormal test tube is clamped separately by the transfer component and taken out of the test tube rack, so as to execute step S303 for the abnormal test tube instead of executing step S303 for the entire test tube rack; when the samples contained in the test tubes contained in the test tube rack can be completely digested, or test tubes that cannot be normally digested are taken out, the transfer component transfers the entire test tube rack to the placement station.

[0066] In some embodiments, Figure 7 As shown, Figure 7 A flow chart of a second method for controlling a digestion system provided by an embodiment of the present invention, and Figure 5 The control method shown is different in that Figure 5 Step S101 in the embodiment includes:

[0067] Step S401, controlling the liquid injection component to inject acid solutions with different corrosive degrees into the test tube according to the number of times the liquid injection component injects acid solutions into the same test tube.

[0068] The degree of corrosion of the acid solution is positively correlated with the number of times the acid solution is re-injected, that is, as the number of times the acid solution is re-injected increases, the degree of corrosion of the acid solution re-injected into the test tube gradually increases each time. The increase in the degree of corrosion can be achieved by increasing the concentration of the acid solution or by changing the type of the acid solution. For example, the acid solution injected for the first time is nitric acid with a concentration of 75%, the acid solution injected for the second time is 95% nitric acid, and the acid solution injected for the third time is 75% hydrofluoric acid, thereby gradually increasing the degree of corrosion of the acid solution to try to improve the digestion degree of the sample. The number of times the acid solution is re-injected into the same test tube can be recorded in different ways. For example, when the recognition device is used to obtain an image of the test tube at the injection station, the number of injections of the injection assembly when the transfer assembly is not moving determines the number of times the injection assembly injects acid into the same test tube; for example, when the recognition device is used to obtain an image of the test tube at the recognition station, the number of times the transfer assembly transfers the test tube at the recognition station to the injection station can be obtained by recording the number of times the transfer assembly transfers the test tube at the recognition station to the injection station.

[0069] Optionally, the digestion system also includes a covering assembly and an acid gas collecting assembly. After the test tube is transferred to the placement station, the control system also includes controlling the covering device to merge the test tube cover with the test tube cover located at the placement station to control the acid gas collecting assembly to extract the acid gas in the test tube from the exhaust pipe. It can be understood that after the test tube and the test tube cover are covered, the air pump of the acid gas collecting assembly starts to run, so that the acid gas collecting assembly can extract the acid gas in the test tube, reduce the possibility of the acid gas in the test tube escaping into the digestion system, and can also condense and collect the acid gas, thereby reducing the workload of the subsequent device for neutralizing the acid gas.

[0070] The embodiment of the present invention also provides a sample testing system, which is used to test the concentration of the sample. The testing system can be a fully automatic testing production line or a semi-automatic testing production line. Fig. 9 The structure of the test system is exemplified.

[0071] In some embodiments, Fig. 9As shown, the test system includes: a weighing system 2, a temporary storage device 3, a color titration device 4, an atomic absorption device 5 and Figures 1 to 4 The digestion system 1 shown in any one of the figures. The weighing system 2 is used to measure the weight of the sample, and the weighed sample is contained in a test tube; the temporary storage device 3 is used to temporarily store the weighed sample, and the temporary storage device 3 can temporarily store the test tube containing the sample so that the test system can perform subsequent operations on the sample. Optionally, multiple test tubes containing samples are contained in a test tube rack, and the temporary storage device 3 is used to contain the test tube rack, and the test system can transfer the test tube rack as a whole.

[0072] The sample in the temporary storage device 3 is transferred to the digestion system 1, and the digestion system 1 performs the steps in the figure of the specification. Figures 5 to 8 The steps in the control method of the digestion system shown in any one of the figures are used to digest the sample. The sample completely digested by the digestion system 1 can be transferred to the color titration device 4 or the atomic absorption device 5 to test the concentration of specific components in the digested sample, wherein the color titration device 4 is used to test the high-concentration sample, and the atomic absorption device 5 is used to test the low-concentration sample after digestion.

[0073] Optionally, the digested sample is transferred to the color titration device 4 for concentration testing. If the concentration obtained by the test is higher than the minimum concentration limit of the color titration device 4, the concentration measured by the color titration device 4 is determined as the concentration of the sample; if the concentration measured by the test is equal to the minimum concentration limit of the color titration device 4, the sample is transferred to the atomic absorption device 5, and the concentration measured by the atomic absorption device 5 is determined as the concentration of the sample.

[0074] Optionally, a first conveyor belt 6 is provided between the digestion system 1 and the color titration device 4 to transfer the sample after digestion to the color titration device 4; optionally, the test system further comprises a constant volume instrument 7, which is used to inject a target volume of liquid into the test tube, wherein the liquid is the sample after digestion, and then transfer the test tube containing the target volume of liquid to the atomic absorption device 5 to obtain the concentration of the sample. It can be understood that the volume of the liquid has an influence on the concentration measured by the atomic absorption device 5, and the constant volume instrument 7 is required to make the volume of the liquid transferred to the atomic absorption device 5 the same each time, thereby improving the accuracy of the concentration measured by the atomic absorption device 5.

[0075] Optionally, the testing system further comprises a bottle washer 8, which is used to wash the test tubes so that the test tubes can be reused. A second conveyor belt 9 is provided between the color titration device 4 and the bottle washer 8 to transfer the test tubes to the bottle washer 8 for washing the test tubes.

[0076] The above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention.

Claims

1. A sample digestion system, characterized in that: The sample is contained in a test tube, and the digestion system comprises: A liquid injection component, having a liquid injection station, and the liquid injection component is used to inject acid into the test tube located at the liquid injection station; A placement component, comprising a placement station, wherein the placement station is used to carry the test tube containing the acid solution and the sample; an identification device, used to obtain an image in the test tube, wherein the image can be used to determine whether the digestion of the sample is abnormal; A transfer component is used to transfer the test tube to the placement station.

2. The digestion system according to claim 1, characterized in that: The liquid injection assembly comprises: A motion table having the liquid injection station; A liquid injection device, used for injecting acid into the test tube located at the liquid injection station; The moving platform can move relative to the liquid injection device, the identification device is fixed to the bottom of the moving platform, and the identification device is used to obtain the image inside the test tube located at the liquid injection station.

3. The digestion system according to claim 1, characterized in that: The placement component further comprises an identification station, the identification station is spaced apart from the placement station, and the identification device is used to obtain an image of the inside of the test tube at the identification station; The transfer assembly is also used to transfer the test tube between the identification station and the liquid injection station.

4. The digestion system according to claim 3, characterized in that: The placement component comprises a turntable, and the identification station and the placement station are arranged at intervals around a rotation axis of the turntable.

5. The digestion system according to claim 1, characterized in that: The digestion system also includes: A covering assembly, used for covering the test tube cover with the test tube located at the placement assembly, wherein the test tube cover has a vent pipe; The acid gas collection component is connected to the vent pipe and is used for condensing and collecting the acid gas.

6. A control method for a digestion system, characterized in that: The control method is applied to the sample digestion system according to any one of claims 1 to 5, and the control method comprises: Controlling the liquid injection device to inject acid into the test tube located at the liquid injection station; The recognition device acquires the image in the test tube, and predicts the digestion degree of the sample after the digestion is completed according to the image; Determining whether the digestion degree of the sample is greater than a digestion threshold; If the digestion degree is less than the digestion threshold, repeatedly controlling the injection device to inject acid into the test tube located at the injection station, obtaining the image in the test tube by the recognition device, and predicting the digestion degree of the sample after the digestion is completed according to the image, and judging whether the digestion degree of the sample is greater than the digestion threshold, until the number of times the injection component injects acid into the same test tube reaches the number threshold; If the digestion degree of the sample is greater than the digestion threshold, the transfer component is controlled to transfer the test tube to the placement station.

7. The digestion system according to claim 6, characterized in that: The recognition device is fixed to the liquid injection device and is capable of acquiring an image of the inside of the test tube at the liquid injection station. The acquisition of the image of the inside of the test tube by the recognition device includes: The recognition device acquires an image of the inside of the test tube at the liquid injection station.

8. The digestion system according to claim 6, characterized in that: The placement component also has an identification station, the identification device is fixed to the placement component and can obtain an image of the test tube located at the identification station, and the transfer component is also used to transfer the test tube between the injection station and the identification station; The obtaining of the image in the test tube by the recognition device comprises: Controlling the transfer component to transfer the test tube to the identification station, and allowing the identification device to acquire an image of the inside of the test tube at the identification station; Between determining that the digestion degree is less than the digestion threshold and controlling the injection device to inject acid into the test tube at the injection station, the control method further includes: controlling the transfer component to transfer the test tube from the identification station to the injection station.

9. The control method according to any one of claims 6 to 8, characterized in that: The controlling the liquid injection component to inject acid into the test tube again comprises: According to the number of times the injection assembly injects acid into the same test tube, the injection assembly is controlled to inject acid with different corrosion degrees into the test tube, wherein the corrosion degree is positively correlated with the number of times the acid is injected again.

10. A sample testing system, characterized in that: The test system comprises: A weighing system, used to weigh the sample; A temporary storage device, used for temporarily storing the weighed sample; The sample digestion system according to any one of claims 1 to 3, used for digesting the sample; Color titration device, used to test high-concentration samples after digestion; Atomic absorption device is used to test low-concentration samples after digestion.

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