A multi-channel cascaded liquid level detection method and system, storage medium

Abstract

The application discloses a kind of multi-channel cascade liquid residual quantity detection method and system, storage medium, belong to medical detection field.The method includes by channel selection time division multiplexing detection circuit, obtains the current residual quantity value of multiple cascade liquid containers;Receive the task parameter containing the predicted amount required to complete the specified task;Compare current residual quantity with predicted amount and generate judgment result;According to judgment result, execute corresponding operation.The application can realize the accurate control of reagent liquid residual quantity in immunohistochemical staining and cleaning process, achieve quantitative cleaning in the staining process, without worrying about liquid shortage and other situations in the cleaning process, effectively guarantee the completion of the staining process;At the same time, compared with the traditional method, it can effectively solve the waste of resources under excessive cleaning, and the liquid residual quantity alarm threshold can also be set, which is higher or lower than the set threshold, automatically uploads the host computer terminal, and makes alarm indication operation, without manual guard.

Description

Technical Field

[0001] This invention relates to the field of medical testing technology, and in particular to a multi-channel cascaded liquid balance detection method and system, and a storage medium. Background Technology

[0002] In immunohistochemical staining, the main procedures involve adding samples to the slides, cleaning, and staining. The quality of the cleaning process directly determines the degree of cross-contamination between reagents during staining. This typically requires using pipette tips or pumps to draw a specific amount of reagent or cleaning solution. Therefore, the amount of reagent or cleaning solution needs to be precisely controlled. Furthermore, the remaining reagent or liquid level determines whether cleaning can be completed for a single staining cycle; insufficient liquid will lead to staining failure.

[0003] Most existing cleaning methods use a time-cumulative approach to clean stained slides. This method cannot achieve high-precision quantitative cleaning and will result in large errors. Excessive cleaning will waste material resources, while insufficient cleaning will lead to poor staining effect or staining failure.

[0004] Therefore, in order to overcome the shortcomings of the prior art, the present invention provides a method for accurately detecting the liquid balance. By measuring the liquid balance, quantitative cleaning operation can be achieved during the dyeing process, and multi-channel liquid balance detection can be achieved through cascading. Summary of the Invention

[0005] To achieve the above-mentioned objectives and other advantages of the present invention, a first objective of the present invention is to provide a multi-channel cascaded liquid balance detection method, comprising the following steps: The current liquid level of each of a plurality of liquid containers is obtained, wherein the plurality of liquid containers are connected to the detection circuit in a cascaded manner and the detection circuit is time-division multiplexed through a channel selection mechanism; Receive task parameters related to a target liquid container, the task parameters including the predicted liquid usage value required to complete the specified task; The current liquid level in the target liquid container is compared with the predicted liquid usage value to generate a judgment result. Based on the judgment result, perform the corresponding processing operation.

[0006] Furthermore, the step of obtaining the current liquid balance value of each of the plurality of liquid containers includes: The weight of the liquid is converted into a weak differential voltage signal by a strain gauge pressure sensor installed under the cargo tray of each liquid container. By using a dual-channel multiplexed analog switch, under the control of the main control module, each sensor channel is selected sequentially, and the differential voltage signal is output to the subsequent circuit. The selected differential voltage signal is amplified by an instrument and converted from analog to digital to obtain the corresponding digital signal quantity; Based on the digital signal quantity and in conjunction with a preset calibration curve or formula, the current liquid balance value is calculated.

[0007] Furthermore, the task parameters include the volume of liquid used in a single operation and the number of operations; the predicted liquid usage value is obtained by multiplying the volume of liquid used in a single operation by the number of operations.

[0008] Furthermore, the step of performing corresponding processing operations based on the judgment result includes: When the judgment result is that the current liquid balance is greater than the predicted liquid usage, an execution permission instruction is generated and reported to the host computer. When the judgment result is that the current liquid balance is less than or equal to the predicted liquid usage, an execution prohibition command is generated and an abnormal alarm is triggered.

[0009] Furthermore, the abnormal alarm includes: visual alarm via a channel indicator light corresponding to the target liquid container, and / or playing voice alarm information via a speaker.

[0010] A second objective of this invention is to provide a multi-channel cascaded liquid balance detection system for implementing the above-mentioned method, comprising: The sensor array contains multiple independently configured weight sensors, each of which is installed below a liquid container to generate an initial signal reflecting the remaining liquid level. The channel selection module has its input terminal connected to the output terminal of all sensors in the sensor array, and is used to select the signal of one of the sensors according to the control signal. The signal processing module is connected to the output of the channel selection module and is used to amplify and convert the selected sensor signal into an analog-to-digital signal. The main control module is connected to the channel selection module and the signal processing module respectively. It is used to send control signals to the channel selection module to select different channels in a time-division multiplexing manner and to receive processed digital signals. The main control module is also used to receive task parameters and execute judgment logic. The parameter setting and communication module is connected to the main control module and is used to receive task parameters sent by the host computer and report the detection results and status to the host computer. An exception handling module, connected to the main control module, is used to perform an alarm operation when an exception judgment result is received. The power supply module is used to provide operating voltage to the various modules of the system.

[0011] Furthermore, the weight sensor is a strain gauge pressure sensor, which internally consists of a full-bridge measurement circuit composed of four strain gauges. The two output terminals of the full-bridge measurement circuit serve as the output terminals of the sensor and are connected to the channel selection module.

[0012] Furthermore, the channel selection module is a dual-channel multiplexed analog switch chip, which has multiple pairs of input channels and one pair of output channels, and the pair of output channels is connected to the signal processing module.

[0013] Furthermore, the signal processing module includes: An instrumentation operational amplifier is used to amplify a selected weak differential voltage signal; A filtering circuit, connected to the output of the instrument's operational amplifier, is used to filter out high-frequency noise; An analog-to-digital converter, connected to the output of the filter circuit, is used to convert analog voltage signals into digital signals for the main control module to read.

[0014] Furthermore, a voltage follower is connected between the filter circuit and the analog-to-digital converter to enhance the signal's driving capability and anti-interference capability.

[0015] A third object of the present invention is to provide a computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the steps of the above-described method.

[0016] Compared with the prior art, the beneficial effects of the present invention are: This invention enables precise control of the remaining reagent liquid during the immunohistochemical staining and cleaning process, achieving quantitative cleaning during staining without worrying about insufficient liquid, thus effectively ensuring the completion of the staining process. At the same time, compared with traditional methods, it can effectively solve the problem of resource waste due to excessive cleaning. It can also set a liquid remaining alarm threshold. If the liquid level is higher or lower than the set threshold, the data will be automatically uploaded to the host computer terminal, and an alarm instruction will be issued without manual supervision.

[0017] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it according to the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. Specific embodiments of the present invention are given in detail below with reference to the accompanying drawings. Attached Figure Description

[0018] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings: Figure 1Schematic diagram of a multi-channel cascaded liquid balance detection system; Figure 2 This is a full-bridge measurement circuit diagram; Figure 3 This is a circuit diagram of a dual-channel, multi-reuse analog switch chip. Figure 4 This is a circuit diagram of an operational amplifier for an instrument. Figure 5 For acquiring circuit diagrams; Figure 6 Flowchart of a multi-channel cascaded liquid balance detection method; Figure 7 Flowchart for reading channel liquid balance before staining begins; Figure 8 Flowchart for executing corresponding processing operations based on the judgment result; Figure 9 A schematic diagram of computer equipment; Figure 10 This is a schematic diagram of a computer-readable storage medium. Detailed Implementation

[0019] The present invention will now be further described with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0020] Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this invention.

[0021] The drawing numbers in this application are only used to distinguish the steps in the scheme and are not used to limit the execution order of the steps. The specific execution order is as described in the specification.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0023] Example 1 A multi-channel cascaded liquid balance detection system, such as Figure 1 As shown, it includes: The sensor array contains multiple independently configured weight sensors, each of which is installed below a liquid container to generate an initial signal reflecting the remaining liquid level. The channel selection module has its input terminal connected to the output terminal of all sensors in the sensor array, and is used to select the signal of one of the sensors according to the control signal. The signal processing module is connected to the output of the channel selection module and is used to amplify and convert the selected sensor signal into an analog-to-digital signal. The main control module is connected to the channel selection module and the signal processing module respectively. It is used to send control signals to the channel selection module to select different channels in a time-division multiplexing manner and to receive processed digital signals. The main control module is also used to receive task parameters and execute judgment logic. The parameter setting and communication module is connected to the main control module and is used to receive task parameters sent by the host computer and report the detection results and status to the host computer. An exception handling module, connected to the main control module, is used to perform an alarm operation when an exception judgment result is received. The power module provides operating voltage to all modules in the system. In this embodiment, the power module includes a main power input and an internal DC / DC power converter.

[0024] In some embodiments, the weight sensor is a strain gauge pressure sensor that uses the piezoelectric effect to measure the electromotive force caused by applying mechanical force to a piezoelectric material. It has a full-bridge measurement circuit composed of four strain gauges. The two output terminals of the full-bridge measurement circuit serve as the output terminals of the sensor and are connected to the channel selection module.

[0025] like Figure 2 As shown, the sensor array is mounted below the liquid container's tray. A full-bridge measurement circuit is constructed using four strain gauges (R1, R2, R3, and R4), with R1 and R3 facing each other, and R2 and R4 facing each other, forming two pairs of balanced bridges. The full-bridge circuit offers the highest sensitivity and accuracy. The two inputs of the full-bridge measurement circuit are connected to a reference voltage of 3.3V and GND, respectively, and the two outputs, U+ and U-, are connected to the inputs of the channel selection module. When the container containing the liquid reagent is placed on the tray, pressure is generated, creating a weak electromotive force between U+ and U-.

[0026] In some embodiments, the channel selection module is a dual-channel, multi-channel multiplexed analog switch chip, such as... Figure 3 As shown, it has multiple pairs of input channels and one pair of output channels, the pair of output channels being connected to the signal processing module.

[0027] like Figure 2 , Figure 3As shown, U+ and U- of the full-bridge measurement circuit are connected to multiple input terminals (connected in pairs) of the dual-channel multiplexed analog switch chip, respectively. The main control module selects and switches the channel. The two output terminals Uo+ and Uo- of the dual-channel multiplexed analog switch chip are connected to the input terminals of the signal processing module.

[0028] In some embodiments, the signal processing module includes: Instrumentation operational amplifiers, such as Figure 4 As shown, resistor R5 is used to amplify the selected weak differential voltage signal, and the resistor R5 adjusts the signal amplification gain. A filtering circuit, connected to the output of the instrument's operational amplifier, is used to filter out high-frequency noise; An analog-to-digital converter, connected to the output of the filter circuit, is used to convert analog voltage signals into digital signals for the main control module to read.

[0029] Preferably, a voltage follower is also connected between the filter circuit and the analog-to-digital converter to enhance the signal's driving capability and anti-interference capability.

[0030] In this embodiment, the acquisition circuit consists of a filter circuit, a voltage follower, and an analog-to-digital converter, such as... Figure 5 As shown, its input terminal is connected to the signal output voltage Vout of the instrumentation operational amplifier. R6 and C1 form a first-order low-pass filter. After passing through the U4 voltage follower, the signal is input to the 24-bit ADC analog-to-digital converter chip. The main control module reads the ADC conversion data and obtains the digital signal quantity. Optionally, the main control module uses a single-chip microcontroller (MCU).

[0031] The parameter setting and communication module connects to the main control module. The host computer terminal sends parameter information to the main control module. The main control module uses this parameter information, such as the volume of washing liquid per cycle, the number of liquid suction cycles, and the remaining liquid level, to calculate the required liquid volume for cleaning. It then analyzes and processes the remaining liquid level based on the current data. The host computer terminal connects to the main control module and uploads real-time monitoring data to the backend host computer terminal.

[0032] In this embodiment, the anomaly handling module includes an LED light and a speaker, which are connected to the main control module. The main control module detects abnormal data conditions in the channel. When an abnormal condition such as insufficient margin or overflow occurs in the channel, the main control module triggers the LED indicator alarm for that channel, and at the same time, the speaker plays an alarm message.

[0033] Example 2 A multi-channel cascaded liquid balance detection method is provided, based on the system described above. For a detailed description of the system, please refer to the corresponding description in the system embodiments described above, which will not be repeated here. Figure 6 As shown, the method includes the following steps: S100. Obtain the current liquid balance value of each of the multiple liquid containers, wherein the multiple liquid containers are connected to the detection circuit in a cascaded manner, and the detection circuit is time-division multiplexed through a channel selection mechanism. The S100 step reads the remaining liquid level in the channel before staining begins. In some embodiments, such as... Figure 7 As shown, the step of obtaining the current liquid level value of each of the multiple liquid containers includes: S110. The weight of the liquid is converted into a weak differential voltage signal by a strain gauge pressure sensor installed under the cargo tray of each liquid container. S120. Under the control of the main control module, the dual-channel multiplexed analog switch sequentially selects each sensor channel and outputs the differential voltage signal to the subsequent circuit. S130. The selected differential voltage signal is amplified by an instrument and converted from analog to digital to obtain the corresponding digital signal quantity; S140. Based on the digital signal quantity and in conjunction with a preset calibration curve or formula, calculate the current liquid balance value.

[0034] Specifically, a sensor array cascades multiple independent weight sensors, each connected to the input of a dual-channel multiplexed analog switch chip. The main control module selects and switches the detection channels, and the output of the dual-channel multiplexed analog switch is connected to the signal processing module. The instrument's operational amplifier amplifies the weak voltage signal, and the amplified voltage signal is converted from analog to digital by an analog-to-digital converter. The main control module reads and records the digital signal data as the current liquid balance value V1.

[0035] S200: Receive task parameters related to the target liquid container, the task parameters including a predicted liquid usage value required to complete the specified task; specifically, the task parameters include the liquid volume per operation and the number of operations; the predicted liquid usage value is obtained by multiplying the liquid volume per operation by the number of operations.

[0036] The S200 step enables the receiving of staining and cleaning parameter information before staining begins. The main control module parses the parameter settings and relevant parameters from the communication module, such as the volume of washing solution per wash, the number of aspiration cycles, and the remaining liquid volume. Based on these parameters, it calculates the required liquid volume V2 for this staining operation. The required liquid volume V2 is equal to the volume of washing solution per wash multiplied by the number of aspiration cycles.

[0037] S300: Compare the current liquid balance of the target liquid container with the predicted liquid usage value to generate a judgment result; S400. Based on the judgment result, perform the corresponding processing operation. For example... Figure 8 As shown, it specifically includes: S410. When the judgment result is that the current liquid remaining value is greater than the predicted liquid consumption value, generate an execution permission instruction and report it to the host computer. S420. When the judgment result is that the current liquid remaining value is less than or equal to the predicted liquid consumption value, generate a prohibition instruction and trigger an exception alarm. The exception alarm includes: visually alarming through a channel indicator light corresponding to the target liquid container, and / or playing a voice alarm message through a speaker.

[0038] The liquid remaining processing status is reported and exception handling is performed through steps S300 and S400. Specifically, the main control module judges the relationship between the liquid consumption value V2 required for this dyeing and the current liquid remaining value V1. When V1 > V2, that is, the liquid remaining is greater than the amount required for this time, the data is reported to the host computer terminal and the dyeing task can be normally executed. When V1 < V2 or V1 = V2, the data is reported to the host computer terminal that the liquid remaining is abnormal and this dyeing process is terminated, and at the same time, corresponding exception handling is performed on the abnormal status.

[0039] Embodiment 3 A computer device 500, as Figure 9 shown, includes a memory 510, a processor 520, and a computer program 530 stored on the memory and executable on the processor. When the processor executes the computer program, it implements the steps of a multi-channel cascaded liquid remaining detection method. For a detailed description of the method, reference can be made to the corresponding description in the above method embodiments, and details will not be repeated here.

[0040] Embodiment 4 A computer-readable storage medium, as Figure 10 shown, stores a computer program thereon. When the computer program is executed by a processor, it implements the steps of a multi-channel cascaded liquid remaining detection method. For a detailed description of the method, reference can be made to the corresponding description in the above method embodiments, and details will not be repeated here.

[0041] The number of devices and the processing scale described here are used to simplify the description of the present invention. The applications, modifications, and changes to the present invention are obvious to those skilled in the art.

[0042] Although the embodiments of the present invention have been disclosed as above, it is not limited to only the applications listed in the specification and embodiments. It can be fully applied to various fields suitable for the present invention. For those familiar with the field, additional modifications can be easily made. Therefore, without departing from the general concept defined by the claims and the equivalent scope, the present invention is not limited to specific details and the illustrated examples described here.

[0043] The apparatus, computer device, and non-volatile computer storage medium and method provided in the embodiments of this specification are corresponding. Therefore, the apparatus, computer device, and non-volatile computer storage medium also have similar beneficial technical effects as the corresponding method. Since the beneficial technical effects of the method have been described in detail above, the beneficial technical effects of the corresponding apparatus, computer device, and non-volatile computer storage medium will not be repeated here.

[0044] Those skilled in the art will also know that, besides implementing the controller in the form of purely computer-readable program code, the same functions can be achieved by logically programming the method steps, making the controller take the form of logic gates, switches, application-specific integrated circuits (ASICs), programmable logic controllers (PLCs), and embedded microcontrollers. Therefore, such a controller can be considered a hardware component, and the devices included within it for implementing various functions can also be considered structures within that hardware component. Alternatively, the devices for implementing various functions can be considered as both software units implementing the method and structures within a hardware component.

[0045] The systems, apparatuses, or units described in the above embodiments can be implemented by computer chips or physical entities, or by products with certain functions. For ease of description, the above apparatuses are described separately as various units based on their functions. Of course, when implementing one or more embodiments of this specification, the functions of each unit can be implemented in one or more software and / or hardware.

[0046] Those skilled in the art will understand that the embodiments of this specification can be provided as methods, systems, or computer program products. Therefore, the embodiments of this specification can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the embodiments of this specification can take the form of a computer program product implemented on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0047] This specification is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this specification. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0048] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0049] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0050] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0051] This specification may be described in the general context of computer-executable instructions, such as program units, that are executed by a computer. Generally, program units include routines, programs, objects, components, data structures, etc., that perform a specific task or implement a specific abstract data type. This specification may also be practiced in distributed computing environments, where tasks are performed by remote processing devices connected via a communication network. In distributed computing environments, program units may reside in local and remote computer storage media, including storage devices.

[0052] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to interchangeably. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments.

[0053] The above description is merely an embodiment of this specification and is not intended to limit the scope of one or more embodiments of this specification. Various modifications and variations can be made to one or more embodiments of this specification by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of one or more embodiments of this specification should be included within the scope of the claims of one or more embodiments of this specification.

Claims

1. A multi-channel cascaded liquid balance detection method, characterized in that, Includes the following steps: The current liquid level of each of a plurality of liquid containers is obtained, wherein the plurality of liquid containers are connected to the detection circuit in a cascaded manner and the detection circuit is time-division multiplexed through a channel selection mechanism; Receive task parameters related to a target liquid container, the task parameters including the predicted liquid usage value required to complete the specified task; The current liquid level in the target liquid container is compared with the predicted liquid usage value to generate a judgment result. Based on the judgment result, perform the corresponding processing operation.

2. The multi-channel cascaded liquid balance detection method as described in claim 1, characterized in that, The step of obtaining the current liquid balance value of each of the multiple liquid containers includes: The weight of the liquid is converted into a weak differential voltage signal by a strain gauge pressure sensor installed under the cargo tray of each liquid container. By using a dual-channel multiplexed analog switch, under the control of the main control module, each sensor channel is selected sequentially, and the differential voltage signal is output to the subsequent circuit. The selected differential voltage signal is amplified by an instrument and converted from analog to digital to obtain the corresponding digital signal quantity; Based on the digital signal quantity and in conjunction with a preset calibration curve or formula, the current liquid balance value is calculated.

3. The multi-channel cascaded liquid balance detection method as described in claim 1, characterized in that, The task parameters include the volume of liquid used in a single operation and the number of operations; the predicted liquid usage value is obtained by multiplying the volume of liquid used in a single operation by the number of operations.

4. The multi-channel cascaded liquid balance detection method as described in claim 1, characterized in that, The steps for performing corresponding processing operations based on the judgment result include: When the judgment result is that the current liquid balance is greater than the predicted liquid usage, an execution permission instruction is generated and reported to the host computer. When the judgment result is that the current liquid balance is less than or equal to the predicted liquid usage, an execution prohibition command is generated and an abnormal alarm is triggered.

5. The multi-channel cascaded liquid balance detection method as described in claim 4, characterized in that, The abnormal alarm includes: visual alarm via a channel indicator light corresponding to the target liquid container, and / or voice alarm information played via a speaker.

6. A multi-channel cascaded liquid balance detection system for implementing the method as described in any one of claims 1 to 5, characterized in that, include: The sensor array contains multiple independently configured weight sensors, each of which is installed below a liquid container to generate an initial signal reflecting the remaining liquid level. The channel selection module has its input terminal connected to the output terminal of all sensors in the sensor array, and is used to select the signal of one of the sensors according to the control signal. The signal processing module is connected to the output of the channel selection module and is used to amplify and convert the selected sensor signal into an analog-to-digital signal. The main control module is connected to the channel selection module and the signal processing module respectively. It is used to send control signals to the channel selection module to select different channels in a time-division multiplexing manner and to receive processed digital signals. The main control module is also used to receive task parameters and execute judgment logic. The parameter setting and communication module is connected to the main control module and is used to receive task parameters sent by the host computer and report the detection results and status to the host computer. An exception handling module, connected to the main control module, is used to perform an alarm operation when an exception judgment result is received. The power supply module is used to provide operating voltage to the various modules of the system.

7. The multi-channel cascaded liquid balance detection system as described in claim 6, characterized in that, The weight sensor is a strain gauge pressure sensor, which internally consists of a full-bridge measurement circuit composed of four strain gauges. The two output terminals of the full-bridge measurement circuit serve as the output terminals of the sensor and are connected to the channel selection module.

8. The multi-channel cascaded liquid balance detection system as described in claim 7, characterized in that, The channel selection module is a dual-channel multiplexed analog switch chip, which has multiple pairs of input channels and one pair of output channels. The pair of output channels is connected to the signal processing module.

9. The multi-channel cascaded liquid balance detection system as described in claim 6, characterized in that, The signal processing module includes: An instrumentation operational amplifier is used to amplify a selected weak differential voltage signal; A filtering circuit, connected to the output of the instrument's operational amplifier, is used to filter out high-frequency noise; An analog-to-digital converter, connected to the output of the filter circuit, is used to convert analog voltage signals into digital signals for the main control module to read.

10. The multi-channel cascaded liquid balance detection system as described in claim 9, characterized in that, A voltage follower is also connected between the filter circuit and the analog-to-digital converter to enhance the signal's driving capability and anti-interference capability.

11. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method as described in any one of claims 1 to 5.

Images