Sample adding device and sample adding method using the same

Abstract

The present invention provides a sample adding device and a sample adding method using the sample adding device. The sample adding device includes: a sample adding container, with a sample outlet provided at the bottom of the sample adding container; and a sample adding rotating shaft, which is arranged in the sample adding container. The sample adding rotating shaft can rotate around its axis and can move along the axis between a first working position and a second working position. The sample outlet is located on the axis. A blocking portion is provided at the lower end of the sample adding rotating shaft, and a threaded sample adding groove is provided on the side surface of the sample adding rotating shaft and above the blocking portion. Wherein the blocking portion blocks the sample outlet at the first working position, the blocking portion is located outside the sample outlet at the second working position, and the sample adding groove penetrates through the sample outlet at the second working position. The sample adding device provided by the present invention can achieve precise control of the sample output volume by setting the sample adding rotating shaft. By providing a blocking portion at the end of the sample adding rotating shaft, the sample outlet can be opened when sample adding is required, and the sample outlet can be closed when sample adding stops, preventing the material from falling and affecting the sample adding accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of material adding devices, and particularly, to a sampling device and a sampling method using the sampling device. Background Art

[0002] In the field of life sciences, it is often necessary to perform operations such as adding powder or adding liquid. Existing sampling devices mainly achieve the purpose of sampling by the self-weight of the material in the sampling container falling downward. However, this method not only has low sampling efficiency, the material is prone to clogging outside the sample outlet, but also cannot accurately control the sampling amount of the material. Currently, there is an urgent need for a sampling solution that can improve the sampling accuracy of the material and ensure the sampling efficiency at the same time. Summary of the Invention

[0003] In order to at least partially solve the problems existing in the prior art, according to one aspect of the present invention, there is provided a sampling device, including: a sampling container, the bottom of the sampling container is provided with a sample outlet; and a sampling rotating shaft, the sampling rotating shaft is arranged in the sampling container, the sampling rotating shaft is rotatable about its axis and movable along the axis between a first working position and a second working position, the sample outlet is located on the axis, a blocking portion is arranged at the lower end of the sampling rotating shaft, and a threaded sampling groove is arranged on the side surface of the sampling rotating shaft and above the blocking portion, wherein the blocking portion blocks the sample outlet in the first working position, the blocking portion is located outside the sample outlet in the second working position, and the sampling groove penetrates through the sample outlet in the second working position.

[0004] It can be seen from this that the sampling device provided by the embodiment of the present invention can achieve precise control of the sample output by setting the sampling rotating shaft, and by arranging the blocking portion at the end of the sampling rotating shaft, the sample outlet can be opened when sampling is required, and the sample outlet can be closed when sampling stops, preventing the material from falling and affecting the sampling accuracy.

[0005] Exemplarily, the sample outlet is a circular opening, and the blocking portion is in the shape of a frustum of a cone that gradually contracts upward.

[0006] Exemplarily, the sampling device further includes a sampling box, the sampling container is provided with a sampling port, and the sampling box is detachably connected to the sampling port.

[0007] Exemplarily, the bottom surface of the sampling container slopes downward along the direction towards the sample outlet.

[0008] Exemplarily, the upper part of the sampling container is cylindrical and the lower part is in the shape of an inverted cone.

[0009] Exemplarily, the sampling device further includes a stirrer located in the sampling container and sleeved on the sampling rotating shaft, the stirrer is fixed relative to the sampling rotating shaft in the circumferential direction and movable relative to the sampling rotating shaft along the axis.

[0010] Exemplarily, a chute extending along the axis is provided on the side of the sample loading rotating shaft and above the sample loading groove, and the stirrer is provided with a protrusion slidably connected to the chute.

[0011] Exemplarily, the cross-section of the sample loading groove is rectangular.

[0012] According to another aspect of the present invention, there is provided a sample loading method using any one of the above sample loading devices. The sample loading method includes: driving the sample loading rotating shaft to operate at a first rotation speed V1 in a first period, wherein the first amount of sample to be loaded P1 after the first period is proportional to the first sample loading rate K1 in the first period; driving the sample loading rotating shaft to operate at a second rotation speed V2 in a second period, wherein the second amount of sample to be loaded P2 after the second period is proportional to the second sample loading rate K2 in the second period; driving the sample loading rotating shaft to operate at a third rotation speed V3 in a third period until the sample loading is completed.

[0013] In this sample loading method, a sample loading cycle is divided into three periods. Compared with the two-end sample loading scheme in the traditional technology, that is, after the first period of sample loading is completed at a relatively fast rate, and then the second period of sample loading is completed at a very slow rate, it is difficult to ensure the sample loading efficiency. And compared with dividing the sample loading process into more periods, the calculation amount is large, the operation is complex, and the production cost is relatively high. For the present invention, dividing the sample loading process into three periods can balance the sample loading efficiency and production cost.

[0014] Exemplarily, the first rotation speed V1, the second rotation speed V2, the duration T1 of the first period, the duration T2 of the second period, and the third sample loading parameter in the third period are determined at least by using the total amount M of the first material and the preset sample loading parameter in the third period. The preset sample loading parameter includes one of the third rotation speed V3 and the duration T3 of the third period, and the third sample loading parameter includes the other of the third rotation speed V3 and the duration T3 of the third period.

[0015] Exemplarily, the method further includes: determining the first rotation speed V1 and the second rotation speed V2 at least by using the total amount M of the first material and the preset sample loading parameter; and determining the duration T1 of the first period, the duration T2 of the second period, and the third sample loading parameter based on the first rotation speed V1 and the second rotation speed V2.

[0016] Exemplarily, determining the first rotation speed V1 and the second rotation speed V2 includes: determining the first sample loading rate K1 and the second sample loading rate K2 by using the total amount M, the preset sample loading parameter, the rotation speed switching delay time C, and the third amount of sample to be loaded P3 after the third period; and determining the first rotation speed V1 and the second rotation speed V2 based on the fact that the rotation speed of the sample loading rotating shaft is proportional to the sample loading rate by a proportionality coefficient, by using the first sample loading rate K1 and the second sample loading rate K2.

[0017] Exemplarily, the preset sample addition parameter is the third rotation speed V3. Determining the first sample addition rate K1 and the second sample addition rate K2 includes: based on the functional relationship between the total duration T and the first sample addition rate K1 and the second sample addition rate K2, the derivative relationship of the total duration T with respect to the first sample addition rate K1, and the derivative relationship of the total duration with respect to the second sample addition rate K2, determining the first sample addition rate K1 and the second sample addition rate K2 that minimize the total duration, where T = T1 + T2 + T3. In the functional relationship, the total amount M, the third sample addition rate K3, the rotation speed switching delay time C, and the third sample amount to be added P3 are constants.

[0018] Exemplarily, the method further includes: in the first period, the second period, and the third period, respectively obtaining the actual sample addition amounts Q1, Q2, and Q3 in each period; based on the actual sample addition amounts Q1, Q2, and Q3, and the first rotation speed V1, the second rotation speed V2, and the third rotation speed V3, updating the proportionality coefficient for subsequent sample addition operations.

[0019] Exemplarily, V1 > V2 > V3.

[0020] Exemplarily, P1 = k1 * K1; P2 = k2 * K2; where k1 = k2.

[0021] A series of simplified concepts are introduced in the summary of the invention, which will be further described in detail in the detailed description of the embodiments section. The summary of the invention section is not intended to attempt to define the key features and essential technical features of the claimed technical solution, nor is it intended to attempt to determine the protection scope of the claimed technical solution.

[0022] The advantages and features of the present invention will be described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The following drawings of the present invention are used as part of the present invention to understand the present invention. The embodiments and descriptions of the present invention shown in the drawings are used to explain the principles of the present invention. In the drawings,

[0024] Figure 1 is a cross-sectional view of a sample addition device according to an exemplary embodiment of the present invention; and

[0025] Figure 2 is Figure 1 a perspective view of the sample addition rotating shaft shown in

[0026] Among them, the above-mentioned drawings include the following reference numerals:

[0027] 100, sample addition container; 101, sample outlet; 200, sample addition rotating shaft; 201, blocking portion; 202, sample addition groove; 203, sliding groove; 300, sample addition box; 400, stirrer. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] In the following description, numerous specific details are provided to enable a thorough understanding of the present invention. However, those skilled in the art will appreciate that the following description merely exemplarily illustrates the preferred embodiments of the present invention, and the present invention may be implemented without one or more of such details. Additionally, to avoid confusion with the present invention, some well-known technical features in the art are not described in detail.

[0029] According to one aspect of the present invention, a sample adding device is provided, as Figure 1-2 shown. The sample adding device may include a sample adding container 100 and a sample adding rotating shaft 200.

[0030] The sample adding container 100 may be used to store the material to be sampled inside it. A sample outlet 101 may be provided at the bottom of the sample adding container 100. The material may be discharged from the sample outlet 101. The sample adding container 100 may be in a bucket shape, a funnel shape, etc., without specific limitation.

[0031] The sample adding rotating shaft 200 may be disposed inside the sample adding container 100. The sample adding rotating shaft 200 may be rotatable about its axis and movable along the axis between a first position and a second position. The sample outlet 101 may be located on the axis. A blocking portion 201 may be provided at the lower end of the sample adding rotating shaft 200. A threaded sample adding groove 202 may be provided on the side surface of the sample adding rotating shaft 200 and above the blocking portion 201. Among them, the blocking portion 201 may block the sample outlet 101 when in the first position. The blocking portion 201 may be located outside the sample outlet 101 when in the second position, and the sample adding groove 202 may penetrate through the sample outlet 101 when in the second position.

[0032] The blocking portion 201 may be in the shape of a plug to block the sample outlet 101. When the sample adding rotating shaft 200 is in the first position, the sample adding rotating shaft 200 may move upward, and the blocking portion 201 may block the sample outlet 101. When the sample adding rotating shaft 200 is in the second position, the sample adding axis 200 may move downward, the blocking portion 201 may disengage from the sample outlet 101, and the sample outlet 101 may be opened. When the sample adding rotating shaft 200 rotates about the axis, the sample adding groove 202 may continuously send the material in the sample adding container 100 out from the sample outlet 101. In this way, when the sample adding device is not adding samples, the blocking portion 201 may block the sample outlet 101 to prevent the material from continuing to fall from the sample outlet 101, improving the sample discharging accuracy.

[0033] It can be seen that the sample adding device provided by the embodiments of the present invention can achieve precise control of the sample discharging amount by setting the sample adding rotating shaft 200, and by providing the blocking portion 201 at the end of the sample adding rotating shaft 200, the sample outlet 101 can be opened when sample adding is required, and the sample outlet 101 can be closed when sample adding stops to prevent the material from falling and affecting the sample adding accuracy.

[0034] Exemplarily, the sample outlet 101 can be a circular opening, and the blocking portion 201 can be in the shape of a frustum of a cone that gradually contracts upward. With the sample outlet 101 and the blocking portion 201 configured in this way, the blocking portion 201 can block the sample outlet 101 when the sample adding rotating shaft 200 rotates to any angle. Compared with a sample outlet 101 having a polygonal shape, it can be avoided that the blocking portion 201 fails to block the sample outlet 101 at certain angles, resulting in incorrect addition of materials.

[0035] Exemplarily, the sample adding device can further include a sample adding box 300. The sample adding container 100 can be provided with a sample adding port. The sample adding box 300 can be detachably connected to the sample adding port. The sample adding box 300 can be used to store the materials that need to be added. The materials in the sample adding box 300 can first enter the sample adding container 100 through the sample adding port. The materials located in the sample adding container 100 can be discharged from the sample outlet 101 by the rotation of the sample adding rotating shaft 200. By providing the detachable sample adding box 300, the user can determine the total amount of materials added each time. When all the materials in the sample adding box 300 are used up, the user can replace the sample adding box 300, which is convenient to operate.

[0036] Exemplarily, the bottom surface of the sample adding container 100 can be inclined downward along the direction towards the sample outlet 101. As Figure 1 shown, the bottom surface of the sample adding container 100 can form a funnel shape, so that it can be convenient for the materials to continuously flow towards the sample outlet 101, avoiding the formation of a cavity at the sample outlet 101 and affecting the sample adding accuracy.

[0037] Exemplarily, the upper part of the sample adding container 100 is cylindrical and the lower part is in the shape of an inverted cone. This configuration can increase the internal volume of the sample adding container 100 on the basis of ensuring that the materials can flow towards the sample outlet 101, so that more materials can be stored. In addition, the sample adding rotating shaft 200 also needs to occupy a relatively large space inside the sample adding container 100, so that it is convenient to arrange the sample adding rotating shaft 200 inside the sample adding container 100.

[0038] Exemplarily, the sample adding device may further include a stirrer 400 located within the sample adding container 100 and sleeved on the sample adding rotating shaft 200. The stirrer 400 may be fixed in position relative to the sample adding rotating shaft 200 in the circumferential direction and movable relative to the sample adding rotating shaft 200 along the axis. The function of the stirrer 400 is to stir the material within the sample adding container 100 during the rotation of the sample adding rotating shaft 200, so that the material can be evenly distributed within the sample adding container 100 and move towards the sample outlet 101. The arrangement between the stirrer 400 and the sample adding rotating shaft 200 enables the stirrer 400 to rotate with the sample adding rotating shaft 200, but in the vertical direction, it does not move relative to the sample adding container. In this way, regardless of the position of the sample adding rotating shaft in the vertical direction, the lower end of the stirrer 400 can be brought into contact with the bottom wall of the sample adding container 100 under its own weight or the action of an elastic member to stir the material.

[0039] Exemplarily, a chute 203 extending along the axis may be provided on the side surface of the sample adding rotating shaft 200 and above the sample adding groove 202. The stirrer 400 may be provided with a protrusion that is slidably connected to the chute 203. The chute 203 can drive the stirrer 400 to rotate and move the stirrer 400 along the chute. This structure is simple and easy to implement.

[0040] Exemplarily, the cross-section of the sample adding groove 202 may be rectangular, that is, the sample adding groove 202 may be a rectangular thread provided on the side wall of the sample adding rotating shaft 200. The advantage of the rectangular thread is that its thread surfaces are parallel to each other, so when the sample adding rotating shaft 200 rotates, it can stably push the material towards the sample outlet 101, improving the discharging speed of the sample adding device per unit time.

[0041] According to another aspect of the present invention, a sample adding method is provided. The sample adding method includes: driving the sample adding rotating shaft 200 to operate at a first rotation speed V1 during a first period, where the first amount of sample to be added P1 after the first period is proportional to the first sample adding rate K1 of the first period; driving the sample adding rotating shaft 200 to operate at a second rotation speed V2 during a second period, where the second amount of sample to be added P2 after the second period is proportional to the second sample adding rate K2 of the second period; driving the sample adding rotating shaft 200 to operate at a third rotation speed V3 until the sample adding is completed.

[0042] The sample loading rate can also be expressed as the amount of sample loaded per unit time. By reasoning, it can be known that the rotation speed of the sample loading rotating shaft is linearly related to the amount of sample loaded per unit time. We can use delta = a*V + b to represent it, where V is the rotation speed of the sample loading rotating shaft, delta is the amount of sample loaded per unit time, a is the coefficient, and b is the intercept. Theoretically, b should be 0. The inventor conducted sample loading experiments on various sample loading materials and proved according to the test results that the rotation speed is linearly related to the amount of sample loaded per unit time. The faster the rotation speed, the more the amount of sample loaded per unit time. In other words, the rotation speed of the rotating shaft is proportional to the sample loading rate. Since inertia will be generated when the sample loading rotating shaft rotates, when the sample loading rotating shaft switches speeds between multiple time periods, affected by inertia, some more materials will be added. In addition, there is also a delay in the controller's control of the sample loading rotating shaft. From the time when the control signal is sent until the sample loading rotating shaft switches speeds according to the signal, some more materials will also be added. In order to ensure that the final amount of added material does not exceed the total amount of material M, it is necessary to set the remaining amount of material to be loaded P at the end of each sample loading period. According to the test, the inventor found that when switching speeds for the last time, the remaining sample loading amount P≥1.5*delta is the most reasonable.

[0043] Taking P = 1.5delta for each time period as an example, where the amount of sample loaded per unit time in the first time period is 20mg / s and the amount of sample loaded per unit time in the second time period is 10mg / s. In the first time period, the sample loading rotating shaft loads samples at an amount of 20mg / s per unit time. When the first remaining amount of sample to be loaded P1 = 30mg, the first time period ends. The sample loading rotating shaft enters the second time period for sample loading, and the sample loading rotating shaft loads samples at an amount of 10mg / s per unit time. When the second remaining amount of sample to be loaded P2 = 15mg, the second time period ends. Finally, the sample loading rotating shaft enters the third time period for sample loading. In the third time period, the sample loading rotating shaft loads samples at a known speed V until the sample loading is completed.

[0044] It should be noted that this sample loading method divides a sample loading cycle into three time periods. Compared with the two-stage sample loading scheme in the traditional technology, that is, after completing the sample loading in the first time period at a faster rate and then completing the sample loading in the second time period at a very slow rate, it is difficult to guarantee the sample loading efficiency. And compared with dividing the sample loading process into more time periods, the calculation amount is large, the operation is complex, and the production cost is high. For this invention, dividing the sample loading process into three time periods can balance the sample loading efficiency and production cost.

[0045] Exemplarily, the first rotation speed V1, the second rotation speed V2, the duration T1 of the first period, the duration T2 of the second period, and the third sample addition parameter of the third period are determined at least using the total amount M of the first material and the preset sample addition parameter of the third period. The preset sample addition parameter includes one of the third rotation speed V3 and the duration T3 of the third period. The third sample addition parameter may include the other of the third rotation speed V3 and the duration T3 of the third period. Among them, in the embodiment where the preset sample addition parameter includes the third rotation speed V3, the rotation speed V3 of the rotating shaft in the third period is a known quantity. In the embodiment where the preset sample addition parameter includes the duration T3 of the third period, the sample addition duration T3 in the third period is a known quantity. The user can reasonably select the known third sample addition parameter according to the characteristics of the material. This is because, in the third period, after taking the rotation speed as a known quantity, the sample addition duration may be very short. For some materials that are difficult to discharge from the sample outlet, the time is too short to completely discharge them, so it is necessary to set the duration in the third period.

[0046] Exemplarily, the sample addition method further includes:

[0047] Determine the first rotation speed V1 and the second rotation speed V2 at least using the total amount M of the first material and the preset sample addition parameter; based on the first rotation speed V1 and the second rotation speed V2, determine the duration T1 of the first period, the duration T2 of the second period, and the third sample addition parameter.

[0048] According to the requirements, the following equations can be listed:

[0049] (T1 + C)*K1 + T2*K2 + (T3 - C)*K3 + P3 = M -----------------------①

[0050] P1 = C*K1 + T2*K2 + (T3 - C)*K3 + P3 = 1.5*K1 -----------------②

[0051] P2 = C*K2 + (T3 - C)*K3 + P3 = 1.5*K2 --------------------------------③

[0052] T min ≤ T1 + T2 + T3 ≤ T max --------------------------------------------------④

[0053] Taking the third rotation speed V3 in the known third period as an example,

[0054] Wherein, T1, T2, and T3 are the sample addition durations of the first period, the second period, and the third period respectively; K1, K2, and K3 are the sample addition amounts per unit time in the first period, the second period, and the third period respectively, and K3 is fixed to the sample addition amount per unit time corresponding to a rotation speed of 0.1 r / s (which can be obtained from the above experimental data); C is the equipment + communication delay time at the rotation speed switch. Through experiments, it is approximately taken as 1 second; P1, P2, and P3 are the sample amounts to be added at each rotation speed switch, where P3 is defaulted to 1 mg; T min T max are the upper and lower limits of the total time; M is the total weight.

[0055] Exemplarily, the sample addition method further includes: determining a first rotation speed V1 and a second rotation speed V2, including: using the total amount M, preset sample addition parameters, rotation speed switch delay time C, and the third sample amount to be added P3 after the third period to determine a first sample addition rate K1 and a second sample addition rate K2; and based on the rotation speed of the sample addition rotating shaft being proportional to the sample addition rate by a proportionality coefficient, using the first sample addition rate K1 and the second sample addition rate K2 to determine the first rotation speed V1 and the second rotation speed V2.

[0056] Exemplarily, the preset sample addition parameter is a third rotation speed V3 to determine the first sample addition rate K1 and the second sample addition rate K2. The sample addition method includes: based on the functional relationship between the total duration T and the first sample addition rate K1 and the second sample addition rate K2, the derivative relationship of the total duration T with respect to the first sample addition rate K1, and the derivative relationship of the total duration with respect to the second sample addition rate K2, determining the first sample addition rate K1 and the second sample addition rate K2 that minimize the total duration, where T = T1 + T2 + T3, and in the functional relationship, the total amount M, the third sample addition rate K3, the rotation speed switch delay time C, and the third sample amount to be added P3 are constants.

[0057] According to Formulas ①, ②, and ③, the following system of equations is obtained:

[0058]

[0059]

[0060]

[0061] Substituting ⑤, ⑥, and ⑦ into Formula ④, the final formula is obtained:

[0062]

[0063] Taking the derivative of ⑧, the following formula is obtained:

[0064]

[0065]

[0066] Thus, the first sample addition rate K1 and the second sample addition rate K2 can be obtained. According to the ratio coefficient of the sample addition rate to the rotation speed, the first rotation speed V1 and the second rotation speed V2 can be obtained. The optimal solution can be solved using the gradient descent method. When using the gradient descent method to find the solution, taking C = 1 and M = 300 mg as examples, the learning rates are taken as 0.1, 0.2, and 0.3 respectively. The rotation speed in the third time period is a fixed value, V3 = 0.1 r / s, and three groups of optimal solutions can be obtained:

[0067] (10, 1.264911064067352, 30.65569415042095)

[0068] (10, 1.264911064067352, 30.65569415042095)

[0069] (10, 1.2649110640673518, 30.65569415042095)

[0070] Substituting the relationship between the rotation speed and the sample addition amount per unit time, the optimal rotation speed is obtained as:

[0071] V1 = 30 r / s, V2 = 2.5 r / s, and the total time is 30.65 s.

[0072] Exemplarily, the sample addition method further includes: obtaining the actual sample addition amounts Q1, Q2, and Q3 in the first time period, the second time period, and the third time period respectively; updating the proportional coefficient based on the actual sample addition amounts Q1, Q2, and Q3 and the first rotation speed V1, the second rotation speed V2, and the third rotation speed V3 for subsequent sample addition operations. That is to say, in the previous sample addition cycle, the ratio of the obtained actual sample addition amount and the rotation speed is used as a new sample and added to the previous data to recalculate the optimal rotation speed.

[0073] Preferably, V1 > V2 > V3. That is to say, the first rotation speed V1 in the first time period is the largest, followed by the second rotation speed V2 in the second time period, and the third rotation speed V3 in the third time period is the smallest. In other words, as time goes by, the rotation speed of the rotating shaft gradually decreases. In this way, while the remaining sample addition amount to be added gradually decreases, the rotation speed of the rotating shaft is also reduced, which can improve the sample addition accuracy.

[0074] Preferably, P1 = k1 * K1; P2 = k2 * K2; where k1 = k2. k1 is the ratio between the first sample addition amount to be added and the sample addition amount per unit time. k2 is the ratio between the second sample addition amount to be added and the sample addition amount per unit time.

[0075] In some embodiments, k1 = k2 = 1.5 can be set. This setting can reduce the amount of computation and improve the computing speed.

[0076] According to the theoretical formula, a sample addition curve graph with an optimal solution can be obtained. When the optimal solution does not meet the total time, the optimal solution within the specified time range is taken. According to this solution, the corresponding relationship between the rotational speed and the sample addition amount per unit time can be obtained during the first run, and substituted into the formula for calculation to obtain the optimal solution, and the optimal solution is used as the optimal rotational speed for the three-stage rotational speed. Theoretically, it can meet the optimal time.

[0077] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by orientation words such as "front", "rear", "upper", "lower", "left", "right", "lateral", "vertical", "perpendicular", "horizontal" and "top", "bottom", etc. is usually based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description. Without contrary description, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the protection scope of the present invention; the orientation words "inside" and "outside" refer to the inside and outside relative to the contour of each component itself.

[0078] For the convenience of description, regional relative terms such as "above...", "over...", "on the upper surface of...", "above" etc. can be used here to describe the regional positional relationship between one or more components or features shown in the drawings and other components or features. It should be understood that the regional relative terms not only include the orientation of the components described in the drawings, but also different orientations during use or operation. For example, if the components in the drawings are inverted as a whole, the component "above other components or features" or "over other components or features" will include the situation where the component is "below other components or structures" or "under other components or structures". Thus, the exemplary term "above..." can include both the orientation of "above..." and "below...". In addition, these components or features can also be positioned at other different angles (such as rotated 90 degrees or other angles), and this article intends to include all these situations.

[0079] It should be noted that the terms used here are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used here, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, components, assemblies, and / or combinations thereof.

[0080] It should be noted that the terms "first", "second", etc. in the description, claims and the above-mentioned drawings of this application are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so that the embodiments of this application described here can be implemented in an order other than those illustrated or described here.

[0081] The present invention has been illustrated by the above embodiments. However, it should be understood that the above embodiments are only for the purpose of exemplification and illustration, and are not intended to limit the present invention to the scope of the described embodiments. In addition, those skilled in the art can understand that the present invention is not limited to the above embodiments, and more variations and modifications can be made according to the teachings of the present invention, and these variations and modifications all fall within the scope of protection required by the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalent scope.

Claims

1. A sample addition method, characterized in that, The sample addition method includes: Driving the sample addition rotating shaft to work at a first rotation speed V1 in a first time period, where the first sample amount P1 to be added after the first time period is proportional to the first sample addition rate K1 of the first time period; Driving the sample addition rotating shaft to work at a second rotation speed V2 in a second time period, where the second sample amount P2 to be added after the second time period is proportional to the second sample addition rate K2 of the second time period; Driving the sample addition rotating shaft to work at a third rotation speed V3 in a third time period until the sample addition is completed; The first rotation speed V1, the second rotation speed V2, the duration T1 of the first time period, the duration T2 of the second time period, and the third sample addition parameter of the third time period are determined at least by the total amount M of the first material and the preset sample addition parameter of the third time period. The preset sample addition parameter includes one of the third rotation speed V3 and the duration T3 of the third time period, and the third sample addition parameter includes the other of the third rotation speed V3 and the duration T3 of the third time period; The sample addition method further includes: Determining the first rotation speed V1 and the second rotation speed V2 at least by the total amount M of the first material and the preset sample addition parameter; Based on the first rotation speed V1 and the second rotation speed V2, determining the duration T1 of the first time period, the duration T2 of the second time period, and the third sample addition parameter; The determining the first rotation speed V1 and the second rotation speed V2 includes: Using the total amount M, the preset sample addition parameter, the rotation speed switching delay time C, and the third sample amount P3 to be added after the third time period to determine the first sample addition rate K1 and the second sample addition rate K2; and Based on the rotation speed of the sample addition rotating shaft being proportional to the sample addition rate by a proportionality coefficient, using the first sample addition rate K1 and the second sample addition rate K2 to determine the first rotation speed V1 and the second rotation speed V2.

2. The sample addition method according to claim 1, wherein The preset sample addition parameter is the third rotation speed V3. The determining the first sample addition rate K1 and the second sample addition rate K2 includes: Based on the functional relationship between the total duration T and the first sample addition rate K1 and the second sample addition rate K2, the derivative relationship of the total duration T with respect to the first sample addition rate K1, and the derivative relationship of the total duration with respect to the second sample addition rate K2, determining the first sample addition rate K1 and the second sample addition rate K2 that minimize the total duration, where T = T1 + T2 + T3. In the functional relationship, the total amount M, the third sample addition rate K3, the rotation speed switching delay time C, and the third sample amount P3 are constants.

3. The sample addition method according to claim 1 or 2, characterized in that The sample addition method further includes: During the first time period, the second time period, and the third time period, respectively obtaining the actual sample addition amounts Q1, Q2, and Q3 of each time period; Based on the actual sample addition amounts Q1, Q2, and Q3 and the first rotation speed V1, the second rotation speed V2, and the third rotation speed V3, updating the proportionality coefficient for subsequent sample addition operations.

4. The sample addition method according to claim 1, characterized in that, V1 > V2 > V3.

5. The sample addition method according to claim 1, wherein P1 = k1 * K1; P2 = k2 * K2; Where k1 = k2.

6. The sample addition method according to claim 1, wherein The sample addition method is executed by a sample addition device, and the sample addition device includes: A sample adding container, with a sample outlet provided at the bottom of the sample adding container; and A sample adding rotating shaft, which is arranged inside the sample adding container. The sample adding rotating shaft can rotate around its axis and can move along the axis between a first working position and a second working position. The sample outlet is located on the axis. A blocking portion is provided at the lower end of the sample adding rotating shaft, and a threaded sample adding groove is provided on the side surface of the sample adding rotating shaft and above the blocking portion. Wherein the blocking portion blocks the sample outlet at the first working position, the blocking portion is located outside the sample outlet at the second working position, and the sample adding groove penetrates through the sample outlet at the second working position.

7. The sample addition method according to claim 6, characterized in that, The sample outlet is a circular opening, and the blocking portion is in the shape of a frustum of a cone that gradually contracts upward.

8. The sample addition method according to claim 6, characterized in that, The sample adding device further includes a sample adding box. The sample adding container is provided with a sample adding port, and the sample adding box is detachably connected to the sample adding port.

9. The sample addition method according to claim 6, wherein The bottom surface of the sample adding container slopes downward along the direction towards the sample outlet.

10. The sample addition method according to claim 9, characterized in that, The upper part of the sample adding container is cylindrical and the lower part is in the shape of an inverted cone.

11. The sample addition method according to claim 6, characterized in that, The sample adding device further includes a stirrer located inside the sample adding container and sleeved on the sample adding rotating shaft. The stirrer is fixed in position relative to the sample adding rotating shaft in the circumferential direction and can move relative to the sample adding rotating shaft along the axis.

12. The sample addition method according to claim 11, characterized in that, A chute extending along the axis is provided on the side surface of the sample adding rotating shaft and above the sample adding groove. The stirrer is provided with a protrusion that can be slidably connected to the chute.

13. The sample addition method according to claim 6, characterized in that, The cross-section of the sample adding groove is rectangular.

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