Liquid absorption method, storage medium, electronic device, and immunoassay instrument

Abstract

The embodiment of the present application relates to the field of immunoassay analyzer, and discloses a liquid sucking method, a storage medium, an electronic device and an immunoassay analyzer, the method comprising: acquiring an image of a target test tube carrying a liquid; identifying the test tube type of the target test tube based on the image; determining the effective height threshold corresponding to the target test tube based on the preset correspondence relationship between the test tube type and the effective height threshold; and detecting the liquid level of the liquid in real time during the movement of the liquid sucking tool from the top of the target test tube to the liquid surface, wherein the effective height threshold is used as one of the liquid level detection standards of the liquid. The problem that the prior art cannot meet the requirement of customers for a lower dead space amount can be solved.

Description

Technical Field

[0001] This invention relates to the field of immunoassay analyzers, and particularly to a liquid aspiration method, a storage medium, an electronic device, and an immunoassay analyzer. Background Technology

[0002] Sample analyzers, especially immunoassay analyzers, typically use sample tubes to carry the samples. During testing, the analyzer's aspiration needle enters the sample tube to draw the required quantitative sample and distributes it into the testing container. To prevent the aspiration needle from colliding with the bottom of the sample tube and causing damage or sampling malfunctions, a descent threshold is usually set. This threshold is the lowest point the aspiration needle can descend. The volume of the tube below this lowest point is the dead space. The dead space is a crucial indicator for immunoassay analyzers. For pediatric hospitals and neonatal blood testing, due to the smaller sample volume, micro-sample tubes are often used. Therefore, these tubes need a lower dead space, meaning a lower undetectable volume compared to conventional sample tubes. In clinical applications, different types of test tubes may exist depending on the requirements of different laboratories. These different types of test tubes vary in shape and height, resulting in different dead spaces. Currently, many manufacturers' instruments cannot automatically determine the type of test tube used; all test tube types are controlled based on the same dead space. Therefore, in order to prevent the steel needle used for sampling from hitting the bottom of the test tube, the dead space of the test tube is set to be relatively large, which makes it impossible to meet the requirements of special application scenarios for a lower dead space. Summary of the Invention

[0003] The purpose of this invention is to provide at least one method for aspirating liquid, a storage medium, an electronic device, and an immunoassay analyzer, which can at least solve the problem that the prior art cannot meet customers' requirements for low dead space.

[0004] To address the aforementioned technical problems, at least one embodiment of the present invention provides a method for aspirating liquid, comprising:

[0005] Acquire an image of the target test tube containing the liquid;

[0006] The type of test tube for the target test tube is identified based on the image.

[0007] Based on the preset correspondence between test tube type and effective height threshold, the effective height threshold corresponding to the target test tube is determined;

[0008] The suction tool detects the liquid level in real time as it moves from the top of the target test tube toward the liquid surface, wherein the suction tool uses the effective height threshold as one of the liquid level detection standards.

[0009] In some optional embodiments, identifying the test tube type of the target test tube based on the image includes:

[0010] Identify the test tube size information in the image;

[0011] The test tube size information is matched with preset test tube models of different test tube types to determine the test tube type of the target test tube.

[0012] In some optional embodiments, the liquid aspiration method further includes:

[0013] Based on the preset correspondence between the test tube type and the detection parameter threshold of the aspiration tool, the detection parameter threshold corresponding to the target test tube is determined.

[0014] In some optional embodiments, the liquid level is detected in real time as the aspirator moves from above the target test tube toward the liquid surface, including:

[0015] Move the aspiration tool over the target test tube;

[0016] When the suction tool moves to a preset height above the target test tube, the liquid level detection function is activated.

[0017] Real-time detection parameter values ​​are acquired as the suction tool moves toward the liquid surface;

[0018] When the real-time detection parameter value reaches the detection parameter threshold and the suction tool is above the effective height threshold, the liquid level of the liquid is determined to be detected.

[0019] In some alternative embodiments, the detection parameter includes capacitance, and the detection parameter is close to or equal to a detection parameter threshold when the suction tool contacts the liquid surface.

[0020] In some optional embodiments, the liquid aspiration method further includes:

[0021] If the aspiration tool fails to detect the liquid surface even after moving below the effective height threshold, at least one of the following operations shall be performed: resetting the aspiration tool and reporting insufficient sample volume.

[0022] At least one embodiment of the present invention provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described liquid aspiration method.

[0023] At least one embodiment of the present invention provides an electronic device, comprising:

[0024] At least one processor; and,

[0025] A memory communicatively connected to the at least one processor; wherein,

[0026] The memory stores instructions that can be executed by the at least one processor to enable the at least one processor to perform the liquid aspiration method described above.

[0027] At least one embodiment of the present invention provides an immunoassay analyzer, comprising:

[0028] The host computer issues a target task, which includes the task of extracting a certain amount of liquid.

[0029] A test tube scanner is used to acquire images of the target test tube.

[0030] The host computer is used to receive the target task, control the test tube carrier to move to the position of the test tube scanner, and execute the above-mentioned liquid aspiration method.

[0031] A liquid level detector is used to detect the liquid level according to the liquid level detection command from the central control unit.

[0032] A suction tool is used to begin suctioning liquid when a liquid surface is detected above the effective height threshold, according to the control instructions of the central control unit.

[0033] In some alternative embodiments, the target tube includes a sample tube for holding the blood sample to be tested; the aspiration tool includes a suction needle.

[0034] The present invention provides a liquid aspiration method that acquires an image of a target test tube containing liquid; identifies the test tube type based on the image; determines the effective height threshold for the corresponding target test tube based on a preset correspondence between the test tube type and an effective height threshold; and detects the liquid level in real time as the aspiration tool moves from the top of the target test tube towards the liquid surface, wherein the aspiration tool uses the effective height threshold as one of the liquid level detection standards. This method eliminates the need for manual selection of the test tube type, automatically distinguishes the test tube type through image recognition technology, calls the test tube model according to the test tube type, obtains the effective height threshold corresponding to the test tube type, and drives the aspiration tool to detect the liquid level according to the different dead space requirements reflected by the effective height threshold. This method can meet the requirements for low dead space without causing collision, solving the problem that existing technologies cannot meet customers' requirements for low dead space. Attached Figure Description

[0035] One or more embodiments are illustrated by way of example with reference to the accompanying drawings, and these illustrative descriptions do not constitute a limitation on the embodiments.

[0036] Figure 1This is a schematic diagram of the liquid extraction method provided in an embodiment of the present invention;

[0037] Figure 2 These are test tube models of four different test tube types provided in the embodiments of the present invention;

[0038] Figure 3 This is a schematic diagram of a liquid suction device provided in an embodiment of the present invention. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the various embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details are presented in the embodiments of the present invention to facilitate a better understanding of the invention. However, the technical solutions claimed in the present invention can be implemented even without these technical details and various variations and modifications based on the following embodiments. The division of the following embodiments is for ease of description and should not constitute any limitation on the specific implementation of the present invention. The various embodiments can be combined with and referenced by each other without contradiction.

[0040] To address the technical problem that the existing technology cannot meet the requirements for low dead space in special application scenarios, this invention proposes a liquid aspiration method. The implementation details of the liquid aspiration method in this embodiment are described below. The following content is only for ease of understanding and is not necessary for implementing this solution.

[0041] Example 1

[0042] The liquid aspiration method of this embodiment can be applied to electronic devices with communication, computing, and data storage capabilities, especially to immunoassay analyzers, preferably photo-induced chemiluminescence immunoassay analyzers. The specific process can be as follows: Figure 1 As shown, it includes:

[0043] Step 101: Obtain an image of the target test tube containing the liquid.

[0044] In practice, the liquid includes the blood sample to be tested, and the target test tube includes a sample test tube for holding the blood sample. An image of the target test tube is acquired using a test tube scanner.

[0045] In one example, the host computer issues a target task, which can be a task issued by the sample analyzer in the form of a test item list. The task includes the test items corresponding to each blood sample to be tested and the required volume of liquid to be drawn. The method of this embodiment can be applied to the intermediate computer of the immunoassay analyzer. When the intermediate computer receives the target task from the host computer, it controls the test tube holder to move to the test tube scanner position and executes the above-described liquid aspiration method;

[0046] Step 102: Identify the test tube type based on image recognition.

[0047] In specific implementations, the test tube types for target test tubes based on image recognition include:

[0048] Step 102a: Identify the test tube size information in the image.

[0049] Step 102b: Match the test tube size information with the preset test tube models of different test tube types to determine the test tube type of the target test tube.

[0050] In one example, the test tube size information includes length and width. Different types of test tube models are pre-set. The length and width of the target test tube are matched with the length and width of the test tube models. The target test tube model that matches the length and width of the target test tube is determined, and its test tube type is identified as the target test tube type. It should be understood that this matching can mean that the size information is completely identical, or it can mean that the matching meets a preset error range.

[0051] In another example, identifying the test tube type of a target test tube based on an image includes: extracting feature points from the image; matching these feature points with feature points of pre-defined test tube models of different test tube types to determine the test tube type of the target test tube. Here, feature point extraction can be performed using existing feature point extraction methods.

[0052] Step 103: Based on the preset correspondence between test tube type and effective height threshold, determine the effective height threshold of the corresponding target test tube.

[0053] In the specific implementation, a corresponding effective height threshold is set for each test tube type. This threshold is used to obtain the effective height threshold of the target test tube once its type has been determined. The effective height threshold here refers to the lower limit of the effective sample height, which is also the upper limit of the height of the dead space region at the bottom of the test tube. This effective height threshold is then used as the descent threshold for the sampling needle.

[0054] Step 104: The liquid level is detected in real time as the suction tool moves from the top of the target test tube to the liquid surface. The suction tool uses an effective height threshold as one of the liquid level detection standards.

[0055] In its implementation, the aspiration tool includes a sampling needle, a steel needle used to aspirate the liquid contained in the target test tube. The liquid level can be detected by a liquid level detector, which performs liquid level detection according to the control instructions from the central computer. The aspiration tool begins aspirating the liquid once the liquid level is detected above the effective height threshold, according to the control instructions from the central computer.

[0056] In some cases, the liquid level is monitored in real time as the aspirator moves from the top of the target test tube toward the liquid surface, including:

[0057] Step 104a: Move the aspirator over the target test tube.

[0058] Step 104b: When the aspirator is moved to a preset height above the target test tube, the liquid level detection function is activated.

[0059] Step 104c: Acquire real-time detection parameter values ​​as the suction tool moves toward the liquid surface.

[0060] Step 104d: When the real-time detection parameter value reaches the detection parameter threshold and the suction tool is above the effective height threshold, determine the liquid surface of the detected liquid.

[0061] The liquid level detection function is activated when the aspirator moves above the target test tube and reaches a preset height above it. Here, since different test tube types correspond to different dead space volumes, the preset heights for different test tube types are also different. Different preset heights can be set in advance for different test tube types. After determining the test tube type of the target test tube, the preset height for the corresponding target test tube is also determined based on the preset correspondence between the test tube type and the preset height.

[0062] In practical implementation, the detection parameters include capacitance, and these parameters are close to or equal to the detection parameter threshold when the aspirator contacts the liquid surface. Different detection parameter thresholds can be pre-set for different test tube types. After determining the test tube type, the corresponding detection parameter threshold for the target test tube is determined based on the preset correspondence between the test tube type and the detection parameter threshold of the aspirator.

[0063] For example, if the detection parameter threshold for the target test tube is 50mV, when the liquid level detection command is received from the central computer, the liquid level detection module configured in the suction tool first reads the current capacitance value in the air, denoted as ZmV. Based on the test tube type identified by the image recognition, it matches the corresponding detection parameter threshold of 50mV. During the descent of the suction tool, it detects and reads the current capacitance value in real time. If the current capacitance value is Z+50mV, it is determined that the liquid surface has been detected.

[0064] In one example, four different test tube types are provided as test tube models, such as Figure 2As shown, four test tube models A, B, C, and D have different dead space volumes and different dimensions. For different test tube types, the effective liquid height H2, the distance from the bottom of the test tube to the lowest effective height H3, and the distance H1 between the suction tool and the liquid surface when the liquid level detection function is activated are preset. The aforementioned preset height, i.e., the height at which the liquid level detection function is triggered, is determined based on H1 + H2 + H3. At this height, the sample needle reads the current capacitance value in the air for subsequent calculations. Different trigger heights are set according to different test tube types to ensure that the steel needle can activate the detection function above the liquid surface without being affected by the test tube. H2 is different for each test tube type; H2 represents the theoretical range within which the sample needle can detect the liquid surface for any volume of the test tube. H3 is also different for each test tube type; the volume corresponding to H3 in the test tube is the dead space volume of that test tube. H4 = H1 + H2, and the lowest point of H4 is the effective height threshold, which is also the lowest point of the effective height H2.

[0065] Factors affecting the dead space of a test tube include liquid level detection and the shape of the test tube bottom. By setting an H3 value corresponding to each test tube type, it is ensured that liquid can be drawn without hitting the bottom of the test tube. For liquids below H3, the steel needle will no longer detect, ensuring that the needle will not hit the bottom of the test tube. If test tubes use different bottom shapes but H3 is set to the same value, the dead space of some test tubes will increase, and some may even experience needle impact. In this embodiment, the method combines different H3 heights with the determination of an effective height threshold to effectively reduce the dead space. In addition, matching different capacitance thresholds (detection parameter thresholds) to different test tube types to detect the liquid level also enhances the effect of reducing the dead space.

[0066] In some specific implementations, the liquid aspiration method of this embodiment further includes:

[0067] Step 105: If the liquid surface is not detected even after the aspiration tool has moved below the effective height threshold, perform at least one of the following operations: reset the aspiration tool and report insufficient sample volume.

[0068] After activating the liquid level detection function, a liquid level is considered detected when the set detection parameter threshold is triggered. If the aspirator moves to the effective height threshold but the detection parameter threshold is not triggered, the aspirator resets to prevent collision. Simultaneously, the software can report insufficient sample volume. In some cases, either resetting or reporting insufficient sample volume can be performed.

[0069] Example 2

[0070] Another embodiment of the present invention relates to a liquid aspiration device. The implementation details of the liquid aspiration device of this embodiment are described below. The following details are provided for ease of understanding and are not essential for implementing this solution. A schematic diagram of the liquid aspiration device of this embodiment can be shown as follows: Figure 3 As shown, it includes.

[0071] Image acquisition module 201 is used to acquire images of the target test tube containing liquid.

[0072] Type recognition module 202 is used to identify the test tube type of the target test tube based on the image.

[0073] The threshold determination module 203 is used to determine the effective height threshold of the corresponding target test tube based on the preset correspondence between the test tube type and the effective height threshold.

[0074] The liquid level detection module 204 is used to detect the liquid level in real time as the suction tool moves from the top of the target test tube to the liquid level. The suction tool uses an effective height threshold as one of the liquid level detection standards.

[0075] In practice, the liquid includes the blood sample to be tested, and the target test tube includes a sample test tube for holding the blood sample. An image of the target test tube is acquired using a test tube scanner.

[0076] In one example, the host computer issues a target task, which can be a task issued in the form of a work order. The task includes the test items corresponding to each blood sample to be tested and the required volume of liquid to be drawn. The method of this embodiment can be applied to the intermediate computer of an immunoassay analyzer. When the intermediate computer receives the target task from the host computer, it controls the test tube holder to move to the position of the test tube scanner and executes the above-described liquid drawing method.

[0077] In specific implementation, the test tube type of the target test tube is identified based on the image, including: identifying the test tube size information in the image; matching the test tube size information with preset test tube models of different test tube types to determine the test tube type of the target test tube.

[0078] In one example, the test tube size information includes length and width. Different types of test tube models are pre-set. The length and width of the target test tube are matched with the length and width of the test tube models. The target test tube model that matches the length and width of the target test tube is determined, and its test tube type is identified as the target test tube type. It should be understood that this matching can mean that the size information is completely identical, or it can mean that the matching meets a preset error range.

[0079] In another example, identifying the test tube type of a target test tube based on an image includes: extracting feature points from the image; matching these feature points with feature points of pre-defined test tube models of different test tube types to determine the test tube type of the target test tube. Here, feature point extraction can be performed using existing feature point extraction methods.

[0080] In the specific implementation, a corresponding effective height threshold is set for each type of test tube. This threshold is used to obtain the effective height threshold of the target test tube once its type has been determined. Here, the effective height threshold refers to the lower limit of the effective height of the sample, which is also the upper limit of the height of the dead space region at the bottom of the test tube.

[0081] In its implementation, the aspiration tool includes a sampling needle, a steel needle used to aspirate the liquid contained in the target test tube. The liquid level can be detected by a liquid level detector, which performs liquid level detection according to the control instructions from the central computer. The aspiration tool begins aspirating the liquid once the liquid level is detected above the effective height threshold, according to the control instructions from the central computer.

[0082] In some cases, the liquid level is monitored in real time as the aspirator moves from the top of the target test tube toward the liquid surface, including:

[0083] Move the aspirator above the target test tube; when the aspirator reaches a preset height above the target test tube, activate the liquid level detection function; acquire real-time detection parameter values ​​as the aspirator moves toward the liquid level; when the real-time detection parameter values ​​reach the detection parameter threshold and the aspirator is above the effective height threshold, determine the detected liquid level.

[0084] The liquid level detection function is activated when the aspirator moves above the target test tube and reaches a preset height above it. Here, since different test tube types correspond to different dead space volumes, the preset heights for different test tube types are also different. Different preset heights can be set in advance for different test tube types. After determining the test tube type of the target test tube, the preset height for the corresponding target test tube is also determined based on the preset correspondence between the test tube type and the preset height.

[0085] In practical implementation, the detection parameters include capacitance, and these parameters are close to or equal to the detection parameter threshold when the aspirator contacts the liquid surface. Different detection parameter thresholds can be pre-set for different test tube types. After determining the test tube type, the corresponding detection parameter threshold for the target test tube is determined based on the preset correspondence between the test tube type and the detection parameter threshold of the aspirator.

[0086] In some specific implementations, the liquid suction device of this embodiment further includes:

[0087] The anomaly handling module is used to perform at least one of the following operations when the aspiration tool moves below the effective height threshold but still fails to detect the liquid surface: reset the aspiration tool and report insufficient sample volume.

[0088] After activating the liquid level detection function, a liquid level is considered detected when the set detection parameter threshold is triggered. If the aspirator moves to the effective height threshold but the detection parameter threshold is not triggered, the aspirator resets to prevent collision. Simultaneously, the software can report insufficient sample volume. In some cases, either resetting or reporting insufficient sample volume can be performed.

[0089] It is worth mentioning that all modules involved in this embodiment are logical modules. In practical applications, a logical unit can be a physical unit, a part of a physical unit, or a combination of multiple physical units. Furthermore, to highlight the innovative aspects of this invention, this embodiment does not introduce units that are not closely related to solving the technical problem proposed by this invention; however, this does not mean that other units are absent from this embodiment.

[0090] Example 3

[0091] Another embodiment of the present invention relates to a computer-readable storage medium storing a computer program. When executed by a processor, the computer program implements the embodiments of the above-described liquid aspiration method.

[0092] Those skilled in the art will understand that all or part of the steps in the methods of the above embodiments can be implemented by a program instructing related hardware. This program is stored in a storage medium and includes several instructions to cause a device (which may be a microcontroller, chip, etc.) or processor to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0093] Example 4

[0094] Another embodiment of the present invention relates to an electronic device, comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, the instructions being executed by the at least one processor to enable the at least one processor to perform the methods described in the above embodiments.

[0095] The memory and processor are connected via a bus, which can include any number of interconnecting buses and bridges, connecting various circuits of one or more processors and memories. The bus can also connect various other circuits, such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and will not be described further herein. The bus interface provides an interface between the bus and the transceiver. The transceiver can be a single element or multiple elements, such as multiple receivers and transmitters, providing a unit for communicating with various other devices over a transmission medium. Data processed by the processor is transmitted over the wireless medium via an antenna, which further receives data and transmits it to the processor.

[0096] The processor manages the bus and general processing, and also provides various functions, including timing, peripheral interfaces, voltage regulation, power management, and other control functions. Memory is used to store data used by the processor during operation.

[0097] Example 5

[0098] At least one embodiment of the present invention provides an immunoassay analyzer, comprising:

[0099] The host computer issues the target task, which includes the amount of liquid to be extracted.

[0100] A test tube scanner is used to acquire images of the target test tube.

[0101] The intermediate unit is used to receive the target task, control the test tube carrier to move to the position of the test tube scanner, and execute the liquid aspiration method in the above embodiments;

[0102] A liquid level detector is used to detect the liquid level according to the liquid level detection command from the control unit.

[0103] A suction tool is used to begin suctioning liquid when the liquid surface is detected above the effective height threshold, according to the control instructions of the central control unit.

[0104] In practice, the aspiration tool includes a sampling needle, such as a steel needle used to aspirate the liquid contained in the target test tube.

[0105] In a specific implementation, the intermediate unit includes an intermediate unit circuit board, on which intermediate unit control software is installed to implement the methods described in the above embodiments. In practical applications, the intermediate unit receives instructions from the host computer, performs logical judgments and controls specific components, and processes the instructions fed back from the components before feeding them back to the host computer.

[0106] In practical implementation, the liquid level detector can use a liquid level detection plate to process the capacitance signal. The liquid level detection plate is mounted on the bracket of the sampling needle, and the signal line of the intermediate circuit board is connected to the sampling needle to collect changes in capacitance value.

[0107] Those skilled in the art will understand that the above embodiments are specific embodiments for implementing the present invention, and in practical applications, various changes in form and detail may be made without departing from the spirit and scope of the present invention.

Claims

1. A method for aspirating liquid, used in an immunoassay analyzer, characterized in that, include: Acquire an image of the target test tube containing the liquid; The type of test tube for the target test tube is identified based on the image. Based on the preset correspondence between test tube type and effective height threshold, the effective height threshold corresponding to the target test tube is determined; The suction tool detects the liquid level in real time as it moves from the top of the target test tube toward the liquid surface, wherein the suction tool uses the effective height threshold as one of the liquid level detection standards.

2. The liquid aspiration method according to claim 1, characterized in that, The step of identifying the test tube type of the target test tube based on the image includes: Identify the test tube size information in the image; The test tube size information is matched with preset test tube models of different test tube types to determine the test tube type of the target test tube.

3. The liquid aspiration method according to claim 1, characterized in that, Also includes: Based on the preset correspondence between the test tube type and the detection parameter threshold of the aspiration tool, the detection parameter threshold corresponding to the target test tube is determined.

4. The liquid aspiration method according to claim 3, characterized in that, The suction tool continuously monitors the liquid level in real time as it moves from the top of the target test tube toward the liquid surface, including: Move the aspiration tool over the target test tube; When the suction tool moves to a preset height above the target test tube, the liquid level detection function is activated. Real-time detection parameter values ​​are acquired as the suction tool moves toward the liquid surface; When the real-time detection parameter value reaches the detection parameter threshold and the suction tool is above the effective height threshold, the liquid level of the liquid is determined to be detected.

5. The liquid aspiration method according to claim 4, characterized in that, The detection parameter includes capacitance, and the detection parameter is close to or equal to the detection parameter threshold when the suction tool comes into contact with the liquid surface.

6. The liquid aspiration method according to claim 3, characterized in that, Also includes: If the aspiration tool fails to detect the liquid surface even after moving below the effective height threshold, at least one of the following operations shall be performed: resetting the aspiration tool and reporting insufficient sample volume.

7. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by a processor, it implements the liquid aspiration method according to any one of claims 1 to 6.

8. An electronic device, characterized in that, include: At least one processor; as well as, A memory communicatively connected to the at least one processor; wherein, The memory stores instructions executable by the at least one processor to enable the at least one processor to perform the liquid aspiration method as described in any one of claims 1 to 6.

9. An immunoassay analyzer, characterized in that, include: The host computer issues a target task, which includes the task of extracting a certain amount of liquid. A test tube scanner is used to acquire images of the target test tube. A central control unit is used to receive the target task, control the test tube carrier to move to the position of the test tube scanner, and execute the liquid aspiration method according to any one of claims 1 to 6; A liquid level detector is used to detect the liquid level according to the liquid level detection command from the central control unit. A suction tool is used to begin suctioning liquid when a liquid surface is detected above the effective height threshold, according to the control instructions of the central control unit.

10. The immunoassay analyzer according to claim 9, characterized in that, The target test tube includes a sample test tube for holding the blood sample to be tested; the aspiration tool includes a sampling needle.

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