Fluid physical property analysis system and method, storage medium and electronic equipment

Abstract

The invention discloses a fluid physical property analysis system and method, a storage medium and electronic equipment, and relates to the technical field of fluid physical property analysis, and the system comprises a pulsating flow generation device which is used for controlling a to-be-detected fluid to generate periodic pulsating flow in a circulation pipeline; the flow velocity sensing device is used for outputting a reference signal associated with the pulsating flow velocity of the fluid to be measured in real time; the magnetic sensing device is used for detecting a weak magnetic field signal generated by the fluid to be detected in real time as a signal to be detected; the signal processing device is used for performing phase-locked amplification processing on the to-be-measured signal by taking the reference signal as a frequency and phase reference, extracting a magnetic field signal component with the same frequency as fluid pulsation, and outputting the amplitude of the magnetic field signal component; the physical property analysis module is used for calculating and outputting physical property parameters of the to-be-detected fluid through a preset physical property-magnetic field correlation model; and the magnetic shielding device is used for at least partially wrapping the detection section of the circulation pipeline and the magnetic sensing device so as to reduce interference of environment magnetic noise on weak magnetic field detection.

Description

Technical Field

[0001] This application relates to the field of fluid property analysis technology, and in particular to a fluid property analysis system, method, storage medium and electronic device. Background Technology

[0002] The physicochemical properties of fluids, encompassing key parameters such as component concentration, purity, magnetic particle content, ion concentration, and temperature, are core indicators for quality assessment and decision-making in various fields, including biomedical diagnostics, chemical process control, and environmental monitoring. Whether it's the precise analysis of blood components in clinical settings to aid disease diagnosis, the real-time control of catalyst concentration in industrial production to ensure product quality, or the tracking of water corrosion product content in environmental monitoring to warn of equipment wear and tear, all rely on efficient and accurate analysis of fluid properties. Therefore, the optimization and innovation of fluid property analysis technologies remain a key research focus in related fields.

[0003] Currently, the industry primarily relies on two technical approaches for analyzing fluid properties. One approach is traditional offline laboratory analysis, which involves manual sampling followed by detection using specialized instruments such as chromatography, spectroscopy, and mass spectrometry. While this yields high-precision results, it suffers from inherent drawbacks such as long analysis cycles, potential sample contamination or alteration during sampling, reliance on specialized operators, and expensive equipment, making it unsuitable for real-time monitoring. The other approach is modern online process analysis technology, represented by optical and electrochemical methods. Optical methods analyze fluid properties by detecting their absorption and reflection of light, but are susceptible to interference from fluid color, turbidity, and bubbles, and require complex optical systems and regular calibration. Electrochemical methods rely on direct contact between electrodes and the fluid, leading to issues such as electrode contamination, aging, and drift, limiting their application in corrosive fluids or high-purity scenarios. Summary of the Invention

[0004] In view of this, this application provides a fluid property analysis system, method, storage medium, and electronic device that can simultaneously improve the efficiency and accuracy of fluid property analysis.

[0005] According to a first aspect of this application, a fluid property analysis system is provided, comprising: A pulsating flow generator is used to control the periodic pulsating flow of the fluid under test in a flow channel. A flow rate sensing device is used to detect the pulsating flow rate of the fluid under test in real time and output a reference signal associated with the pulsating flow rate. A magnetic sensing device is used to detect in real time the weak magnetic field signal generated by the periodically pulsating fluid under test, and to use it as the signal to be measured. A signal processing device, wherein its reference input terminal is connected to the flow velocity sensing device and its signal input terminal is connected to the magnetic sensing device, the signal processing device is configured to perform phase-locked amplification processing on the signal to be measured using the reference signal as a frequency and phase reference, extract the magnetic field signal component with the same frequency as the fluid pulsation, and output the amplitude of the magnetic field signal component. The physical property analysis module is connected to the signal processing device. The physical property analysis module stores a preset physical property-magnetic field correlation model, which is used to calculate and output the physical property parameters of the fluid under test based on the amplitude of the magnetic field signal component through the physical property-magnetic field correlation model. A magnetic shielding device is used to at least partially enclose the detection section of the flow pipe and the magnetic sensing device to reduce the interference of environmental magnetic noise on the detection of weak magnetic fields.

[0006] According to a second aspect of this application, a fluid property analysis method is provided, the method being applied to the aforementioned fluid property analysis system, comprising: The test fluid is controlled to form a periodic pulsating flow in the flow pipe, and the weak magnetic field signal generated by the periodic pulsating flow of the test fluid is detected in real time and used as the test signal. The pulsating flow velocity of the fluid under test is detected in real time, and a reference signal associated with the pulsating flow velocity is output. Using the reference signal as a frequency and phase reference, the signal under test is subjected to phase-locked amplification to extract the magnetic field signal component with the same frequency as the fluid pulsation, and the amplitude of the magnetic field signal component is output. Based on the amplitude of the magnetic field signal component, a preset property-magnetic field correlation model is invoked to calculate and output the property parameters of the fluid under test.

[0007] According to a third aspect of this application, a storage medium is provided having a computer program stored thereon, which, when executed by a processor, implements the above-described fluid property analysis method.

[0008] According to a fourth aspect of this application, an electronic device is provided, including a storage medium, a processor, and a computer program stored on the storage medium and executable on the processor, wherein the processor executes the program to implement the above-described fluid property analysis method.

[0009] By employing the above technical solution, this application provides a fluid property analysis system, method, storage medium, and electronic device. This system generates periodic pulsating flow in the fluid under test through a pulsating flow generation device, assigning a fixed frequency characteristic to a weak magnetic field signal. Combined with a reference signal output from a flow velocity sensor and the suppression of environmental magnetic noise by a magnetic shielding device, the signal processing device performs phase-locked amplification based on the reference signal. This accurately extracts the weak magnetic field signal component, which is submerged by noise and resonates with the fluid pulsation frequency, and determines its amplitude. Finally, the property analysis module converts the magnetic field amplitude into fluid property parameters through a pre-set property-magnetic field correlation model. This enables non-destructive, online, and high-precision property analysis of various biological fluids and industrial process fluids under normal conditions without extreme operating conditions. It effectively solves the technical bottlenecks of traditional fluid property analysis methods, such as poor timeliness, susceptibility to interference, reliance on complex equipment, or inability to directly convert magnetic field signals into property parameters. It also boasts advantages such as high signal-to-noise ratio, reliable reference signal, and strong versatility.

[0010] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0011] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This paper shows a schematic diagram of the system structure of a fluid property analysis system provided in an embodiment of this application; Figure 2 A schematic flowchart of a fluid property analysis method provided in an embodiment of this application is shown; In the picture: 10 - Pulsating flow generation device; 20 - Flow rate sensing device; 30 - Magnetic sensing device; 40 - Signal processing device; 50 - Property Analysis Module; 60 - Magnetic shielding device. Detailed Implementation

[0012] The present application will be described in detail below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of the present application can be combined with each other.

[0013] Currently, the industry primarily relies on two technical approaches for analyzing fluid properties. One approach is traditional offline laboratory analysis, which involves manual sampling followed by detection using specialized instruments such as chromatography, spectroscopy, and mass spectrometry. While this yields high-precision results, it suffers from inherent drawbacks such as long analysis cycles, potential sample contamination or alteration during sampling, reliance on specialized operators, and expensive equipment, making it unsuitable for real-time monitoring. The other approach is modern online process analysis technology, represented by optical and electrochemical methods. Optical methods analyze fluid properties by detecting their absorption and reflection of light, but are susceptible to interference from fluid color, turbidity, and bubbles, and require complex optical systems and regular calibration. Electrochemical methods rely on direct contact between electrodes and the fluid, leading to issues such as electrode contamination, aging, and drift, limiting their application in corrosive fluids or high-purity scenarios.

[0014] It is noteworthy that the magnetism of fluids (especially magnetic susceptibility), as an inherent physical property, has a definite correlation with physical parameters such as chemical composition, ionic composition, and the content of magnetic materials. Theoretically, physical property analysis can be indirectly achieved by measuring the weak magnetic field of the fluid. However, this technical approach faces a severe core technical challenge: the magnetic field signal intensity generated by most fluids (especially biological fluids and low-concentration chemical solutions) is only within fT ( ) to pT ( The magnetic field strength is on the order of magnitude lower than that of the Earth's magnetic field, by 7-10 orders of magnitude. It is easily overwhelmed by environmental magnetic noise such as power frequency interference, geomagnetic fluctuations, and electronic equipment noise, making direct detection difficult. Existing high-sensitivity magnetic measurement technologies, such as the SQUID magnetometer, can detect weak magnetic fields, but they rely on ultra-low temperature cooling systems and large magnetically shielded chambers. This results in bulky, expensive, and complex equipment that cannot be deployed in conventional environments such as industrial sites or bedside clinics. While newer technologies such as atomic magnetometers and optically pumped magnetometers pursue ultra-high sensitivity, they still heavily rely on magnetically shielded environments. Furthermore, these technologies largely remain at the level of magnetic field measurement and have not been transformed into practical tools for end-user-oriented physical property analysis, making it difficult to realize the technological concept of achieving efficient analysis of fluid properties through magnetic field detection.

[0015] To address the aforementioned problems, embodiments of the present invention provide a fluid property analysis system, such as... Figure 1As shown, the system includes: a pulsating flow generating device 10, used to control the fluid under test to generate periodic pulsating flow in a flow pipe; a flow velocity sensing device 20, used to detect the pulsating flow velocity of the fluid under test in real time and output a reference signal associated with the pulsating flow velocity; a magnetic sensing device 30, used to detect the weak magnetic field signal generated by the periodic pulsating flow of the fluid under test in real time and use it as the test signal; and a signal processing device 40, whose reference input terminal is connected to the flow velocity sensing device 20 and its signal input terminal is connected to the magnetic sensing device 30. The signal processing device 40 is configured to use the reference signal... The signal serves as the frequency and phase reference. The signal to be measured is amplified using a lock-in process to extract the magnetic field signal component that resonates with the fluid pulsation and output the amplitude of the magnetic field signal component. The property analysis module 50 is connected to the signal processing device 40. The property analysis module 50 stores a preset property-magnetic field correlation model, which is used to calculate and output the property parameters of the fluid to be measured based on the amplitude of the magnetic field signal component. The magnetic shielding device 60 is used to at least partially enclose the detection section of the flow pipe and the magnetic sensing device 30 to reduce the interference of environmental magnetic noise on the detection of weak magnetic fields.

[0016] The fluid to be tested is either a biological fluid or an industrial process fluid. Biological fluids may include blood, lymph, or cerebrospinal fluid, while industrial process fluids may include chemical raw materials, petroleum products, liquid metals, or wastewater. The flow channel is a biocompatible or chemically resistant channel adapted to the fluid to be tested. The pulsating flow generator 10 is used to drive or control the periodic pulsating flow of the fluid to be tested within the flow channel. It can be a standalone device (such as a peristaltic pump or piston pump), or it can utilize the inherent flow fluctuations of the existing system or be constructed by adding a pulse generator valve. Its core function is to assign a fixed frequency characteristic to the weak magnetic field of the fluid. The flow velocity sensor 20 is a device that collects the pulsating flow velocity information of the fluid to be tested in real time and converts it into an electrical signal. The output signal is directly related to the pulsating flow velocity and can be used as a reference for subsequent signal processing. The magnetic sensing device 30 is a device capable of capturing the weak magnetic field signal on the order of fT-pT generated by the periodically pulsating fluid, converting the magnetic field physical quantity... The signal is converted into a processable electrical signal (the signal to be measured). The signal processing device 40 is a processing unit with lock-in amplification function. Through signal connection with the flow velocity sensor 20 and the magnetic sensor 30, it extracts the magnetic field signal component with the same frequency as the fluid pulsation from the signal to be measured containing environmental noise, using the reference signal as the frequency and phase reference, and calculates and outputs the amplitude of the component. The physical property analysis module 50 is a functional module that stores a preset physical property-magnetic field correlation model (established through standard sample calibration). It is linked with the signal processing device 40 and is used to convert the magnetic field amplitude into specific physical property parameters of the fluid and output them. The magnetic shielding device 60 is a structure (integral or partial) used to wrap the detection section of the flow pipeline and the magnetic sensor 30. Its core function is to suppress environmental magnetic noise and ensure the accuracy of weak magnetic field detection. The detection section of the flow pipeline is a specific section in the flow pipeline used to house the magnetic sensor 30 and to allow the magnetic sensor 30 to detect the fluid magnetic field signal.

[0017] In specific application scenarios, the pulsating flow generation device 10 can control the fluid under test to form a periodic pulsating flow in the flow pipe, so that the weak magnetic field generated by the fluid has a fixed frequency characteristic. At the same time, the flow velocity sensing device 20 detects the pulsating flow velocity in real time and outputs a related reference signal. Under the premise that the magnetic shielding device 60 reduces the environmental magnetic noise interference, the magnetic sensing device 30 simultaneously collects the weak magnetic field signal generated by the pulsating fluid as the signal to be measured. The signal processing device 40 receives the reference signal from the flow velocity sensing device 20 through the reference input terminal and the signal to be measured from the magnetic sensing device 30 through the signal input terminal. Using the reference signal as the frequency and phase reference, it performs phase-locked amplification processing on the signal to be measured, accurately extracts the magnetic field signal component with the same frequency as the fluid pulsation and calculates its amplitude. Finally, the physical property analysis module 50 calls the preset physical property-magnetic field correlation model, converts the magnetic field amplitude output by the signal processing device 40 into the physical property parameters of the fluid under test and completes the output, realizing continuous analysis of fluid physical properties.

[0018] This technical solution assigns frequency characteristics to the weak magnetic field of the fluid through a pulsating flow generation device. Combined with the suppression of environmental magnetic noise by a magnetic shielding device, and the phase-locked amplification technology of the signal processing device, it can effectively overcome the technical bottleneck of the weak magnetic field of the fluid being submerged by noise. At the same time, it can ensure the accuracy of detection by using a reference signal that is of the same origin as the fluid pulsation. Finally, it realizes the direct conversion of magnetic field signal to physical property parameters through a physical property-magnetic field correlation model. It can achieve non-destructive, online, and high-precision physical property analysis of various fluids without extreme working conditions. It has the advantages of strong anti-interference ability, wide applicability, and low operation threshold, and can solve the problems of poor timeliness, susceptibility to interference, or dependence on complex equipment in traditional analysis methods.

[0019] In specific application scenarios, the pulsating flow generating device 10 can be any one of a peristaltic pump, piston pump, or diaphragm pump, or it can be a pulsating source formed by the inherent flow fluctuation of the original system where the fluid to be measured is located, or a pulsating source composed of a pulse generator valve installed on the flow pipeline; the pulsating flow generating device 10 is connected to the flow pipeline and is used to drive the fluid to be measured to form a periodic pulsating flow, or to superimpose periodic pulsating components in the continuous flow of the fluid to be measured.

[0020] Among them, the peristaltic pump is one specific implementation of the pulsating flow generation device. It drives fluid flow by periodically squeezing an elastic tube, simulating the pulsating characteristics of a living organism and outputting stable sinusoidal pulsations, making it suitable for scenarios with mild flow environment requirements, such as biological fluids. The piston pump is another specific implementation of the pulsating flow generation device. It drives fluid by the reciprocating motion of a piston, allowing for precise control of pulsation frequency and amplitude, making it suitable for applications with high precision requirements for pulsation parameters. The diaphragm pump is another specific implementation of the pulsating flow generation device. It drives fluid through the periodic deformation of a diaphragm, possesses chemical corrosion resistance, and is specifically designed for corrosive fluid scenarios such as chemical raw materials and wastewater. The pulsation source formed by the inherent flow fluctuations of the original system is non-existent. Additional independent equipment is required to directly utilize the natural flow fluctuations generated during the operation of the existing system containing the fluid under test (such as the centrifugal circulating pump in the circulating cooling system) as the source of fluid pulsation, simplifying the system deployment process. The pulsation source composed of adding a pulse generator valve is to add a pulse generator valve to the existing flow pipeline. The periodic opening and closing of the valve changes the fluid flow in the pipeline, forming periodic pulsation. This is a low-cost and easily modified pulsation generation solution. The flow pipeline is the channel that carries the flow of the fluid under test and is connected to the pulsation flow generation device. Its material (such as biocompatible material, corrosion-resistant material) is suitable for different types of fluids under test, and it is equipped with a dedicated detection section to provide a stable carrier for fluid pulsation flow and subsequent magnetic field detection.

[0021] In this embodiment of the present disclosure, the pulsating flow generating device 10 can be flexibly selected according to the characteristics of the fluid to be measured, the application scenario and the existing system conditions. It can be equipped with independent equipment such as peristaltic pump, piston pump or diaphragm pump, or it can directly utilize the inherent flow fluctuation of the original system where the fluid to be measured is located, or install a pulse generator valve on the flow pipeline to form a pulsating source. Through stable connection with the flow pipeline, it can either directly drive the fluid to be measured to form a regular periodic pulsating flow in the pipeline, or superimpose a periodic pulsating component of a fixed frequency on the original continuous flow state of the fluid to be measured, so that the weak magnetic field generated by the fluid has clear and stable frequency characteristics, laying the foundation for subsequent signal detection and processing.

[0022] The pulsating flow generator, through its multi-adaptive design, can meet the needs of different types of fluids, such as biological fluids and corrosive industrial fluids, and can also adapt to different application scenarios, such as new system deployment and existing system renovation. Its stable connection design with the flow pipeline ensures the reliability of pulsation transmission, while the dual-mode design of driving pulsation formation and superimposing pulsation components can further broaden the application range. It can not only reduce the cost and difficulty of system deployment, but also accurately output stable frequency pulsations, providing a key prerequisite for flow velocity sensing devices to obtain homologous reference signals and magnetic sensing devices to collect target magnetic field signals. It can effectively support the accuracy of subsequent lock-in amplification processing, thereby ensuring the high sensitivity and high reliability of the entire fluid property analysis system.

[0023] In specific application scenarios, the flow velocity sensing device 20 is an ultrasonic flow meter or an electromagnetic flow meter; the ultrasonic flow meter is a non-contact clamp-on ultrasonic flow meter, which is tightly clamped to the outer wall of the flow pipe to detect the pulsating flow velocity in a non-invasive manner; the electromagnetic flow meter is a flange-type electromagnetic flow meter, which is in direct contact with the fluid to be measured, and the flow velocity sensing device outputs an electrical signal that is proportional to the instantaneous pulsating flow velocity as a reference signal.

[0024] In this embodiment of the present disclosure, the flow velocity sensing device 20 can flexibly select an ultrasonic flow meter or an electromagnetic flow meter according to the characteristics of the fluid to be measured, the pipeline installation conditions, and the detection accuracy requirements. The ultrasonic flow meter adopts a non-contact clamp structure, which is tightly clamped to the outer wall of the flow pipeline, and can avoid affecting the fluid flow and pipeline integrity in a non-invasive manner. The electromagnetic flow meter adopts a flange structure and is fixed to the flow pipeline. Its detection component is in direct contact with the fluid to be measured to ensure detection accuracy. Both types of flow velocity sensing devices can capture the pulsating flow velocity changes of the fluid to be measured in real time and convert them into an electrical signal that is proportional to the instantaneous pulsating flow velocity, which serves as a reference signal required for subsequent phase-locked amplification processing, laying the foundation for frequency locking between the magnetic field signal and the fluid pulsation.

[0025] The flow velocity sensing device features a dual-selection design using both ultrasonic and electromagnetic flow meters, combined with non-contact clamp-on and contact flange-type installation options. This allows it to meet the needs of scenarios requiring no pipeline damage and continuous operation, while also ensuring high-precision detection for industrial applications. Its output reference signal is precisely proportional to the instantaneous pulsating flow velocity, ensuring that the reference signal and fluid pulsation are of the same origin and frequency. This effectively avoids phase errors and frequency mismatches that may be introduced by external reference signals, providing a stable and reliable reference for the phase-locked amplification of the signal processing device. Consequently, it improves the detection accuracy and anti-interference capability of the entire fluid property analysis system, broadening the system's applicability to different fluid types and installation environments.

[0026] In specific application scenarios, the magnetic sensing device 30 can be any one of a fluxgate magnetometer, an optically pumped magnetometer, a SQUID magnetometer, and an atomic magnetometer. When the magnetic sensing device 30 is an optically pumped magnetometer or an atomic magnetometer, it operates in gradiometer mode. When the magnetic sensing device 30 is a SQUID magnetometer or an atomic magnetometer, it is placed in a magnetically shielded environment. The magnetic sensing device 30 is fixed to the outside of the detection section of the flow pipe by a non-magnetic bracket, or it can be installed above / around the detection pool of the flow pipe by a bypass. Its detection end faces the flow area of ​​the fluid to be measured and is used to collect the weak magnetic field signal generated by the fluid to be measured.

[0027] Among them, the fluxgate magnetometer is one specific implementation of a magnetic sensing device. It boasts low cost, high stability, and sufficient sensitivity to detect magnetic fields generated by microgram-level magnetic particles in fluids, making it suitable for scenarios with strict requirements on detection cost and deployment difficulty. The optically pumped magnetometer is another specific implementation of a magnetic sensing device, with sensitivity approaching that of superconducting quantum interference devices. Operating in gradiometer mode, it effectively suppresses common-mode magnetic noise, making it suitable for scenarios requiring high detection accuracy and environmental adaptability. The SQUID magnetometer is another specific implementation of a magnetic sensing device, possessing ultra-high sensitivity and serving as a core device for detecting extremely weak magnetic fields. However, its detection performance depends on specific environmental conditions. The atomic magnetometer is another specific implementation of a magnetic sensing device, offering high sensitivity and fast response. The device switches between operating modes according to scenario requirements, adapting to various application scenarios such as industrial online monitoring and biomedical detection. The gradient meter mode is a specific operating mode for optically pumped magnetometers or atomic magnetometers. By detecting changes in the magnetic field gradient, it suppresses uniformly distributed common-mode magnetic noise in the environment, further improving the signal-to-noise ratio of weak magnetic field signals and ensuring detection accuracy. The magnetic shielding environment is a low-magnetic-interference environment built for SQUID magnetometers or atomic magnetometers, which can effectively isolate external magnetic noise such as power frequency interference and geomagnetic fluctuations, ensuring that the ultra-high sensitivity magnetic sensing device can perform at its best. The non-magnetic bracket is a support structure used to fix the magnetic sensing device 30. The material does not contain magnetic components, avoiding the generation of magnetic fields that interfere with the detection results and ensuring the relative position stability between the detection end of the magnetic sensing device and the detection section of the flow pipeline.

[0028] In this embodiment of the present disclosure, the magnetic sensing device 30 can be flexibly selected from fluxgate magnetometers, optically pumped magnetometers, SQUID magnetometers, or atomic magnetometers according to the detection sensitivity requirements, environmental magnetic noise conditions, and application scenarios. Among them, optically pumped magnetometers and atomic magnetometers operate in gradiometer mode to suppress common-mode magnetic noise, while SQUID magnetometers and atomic magnetometers need to be set in a magnetically shielded environment to isolate external magnetic interference. At the same time, the magnetic sensing device 30 is fixed to the outside of the detection section of the flow pipe by a non-magnetic bracket, or deployed above and around the detection pool of the flow pipe by a bypass installation method. Its detection end always faces the flow area of ​​the fluid to be measured, ensuring that the weak magnetic field signal generated by the periodically pulsating flow of the fluid to be measured can be accurately captured.

[0029] The magnetic sensing device, through its adaptability to various equipment types, optimized operating modes, and flexible installation design, can meet the differentiated requirements for detection sensitivity in different scenarios. Furthermore, its adaptation to gradiometer mode and magnetic shielding environments effectively suppresses environmental magnetic noise interference. The non-magnetic bracket fixation and bypass installation design ensures detection stability while avoiding impact on fluid flow, significantly improving the accuracy and reliability of weak magnetic field signal acquisition. This provides high-quality test signals for subsequent lock-in amplification processing, ensuring high detection accuracy and strong environmental adaptability of the entire fluid property analysis system, and broadening its application scope in biomedicine, industrial processes, environmental monitoring, and other fields.

[0030] In specific application scenarios, the magnetic shielding device 60 is an integral magnetic shielding chamber, with the detection section of the flow pipeline and the detection part of the magnetic sensing device 30 both located inside the integral magnetic shielding chamber; or, the magnetic shielding device 60 is a partial magnetic shielding structure, only covering the detection end of the magnetic sensing device 30 and the fluid detection area corresponding to the flow pipeline.

[0031] Among them, the integrated magnetic shielding chamber is one of the specific implementations of the magnetic shielding device 60. It is a closed or semi-closed overall protection structure that can build a comprehensive and uniform low magnetic interference environment. It can completely include key detection components within the protection range and is suitable for high magnetic noise environments or ultra-high sensitivity detection scenarios. The local magnetic shielding structure is another specific implementation of the magnetic shielding device 60. It is a targeted protection structure that does not require shielding of the entire area but focuses only on the core detection links, balancing protection effectiveness and deployment flexibility.

[0032] For the embodiments of this disclosure, the magnetic shielding device 60 can be flexibly selected according to the magnetic noise intensity, deployment space constraints and cost requirements of the application scenario. If it is necessary to completely isolate external magnetic interference, an integrated magnetic shielding chamber can be used to place the detection section of the flow pipe and the detection part of the magnetic sensing device 30 inside the chamber, creating a low magnetic interference environment without dead angles. If the scenario space is limited or only targeted protection is required, a partial magnetic shielding structure can be used to precisely wrap only the detection end of the magnetic sensing device 30 and the corresponding fluid detection area on the flow pipe. By focusing on the core detection link, external magnetic noise interference is reduced. Both structures are centered around the core goal of reducing the impact of magnetic noise on the detection of weak magnetic fields, providing a stable protective environment for the magnetic sensing device 30 to accurately collect weak magnetic field signals of the fluid.

[0033] The magnetic shielding device, through its dual-structure adaptation design of integral and local components, provides comprehensive and powerful magnetic shielding protection for high magnetic noise environments or ultra-high sensitivity detection scenarios, while also meeting the precise protection needs of space-constrained and low-cost deployment scenarios. It effectively suppresses the submersion of weak magnetic field signals by external magnetic noise such as power frequency interference and geomagnetic fluctuations, significantly improving the signal-to-noise ratio of the signals acquired by the magnetic sensing device. This provides high-quality test signals for the lock-in amplification processing of subsequent signal processing devices, thereby ensuring the detection accuracy and environmental adaptability of the entire fluid property analysis system. It enables the system to operate stably in complex magnetic environments, broadening its applicability in different application scenarios.

[0034] In specific application scenarios, the signal processing device 40 can be any of a host computer, industrial PLC, or embedded microprocessor system. Its built-in digital lock-in amplifier processing program is specifically configured as follows: receiving the reference signal output by the flow velocity sensor 20 and generating a pair of orthogonal sinusoidal reference signals; multiplying the signal to be measured output by the magnetic sensor 30 with the pair of orthogonal reference signals to obtain two product signals; performing low-pass filtering on the two product signals to filter out AC noise components and obtain two DC components; calculating the amplitude and phase of the magnetic field signal component with the same frequency as the fluid pulsation based on the two DC components, and outputting the amplitude to the physical property analysis module 50.

[0035] In this embodiment of the present disclosure, the signal processing device 40 can be selected from a host computer, industrial PLC, or embedded microprocessor system according to the application scenario requirements. Its built-in digital lock-in amplifier processing program first receives the reference signal output by the flow velocity sensor 20, and generates a pair of orthogonal sinusoidal reference signals with the same frequency and a phase difference of 90° based on the signal. At the same time, the signal processing device 40 receives the test signal containing environmental magnetic noise output by the magnetic sensor 30, and performs multiplication operations on the test signal with the pair of orthogonal sinusoidal reference signals to obtain two product signals containing sum frequency and difference frequency components. Then, low-pass filtering is performed on the two product signals to filter out the high-frequency AC noise components and retain the two stable DC components related to the target magnetic field signal. Finally, the amplitude and phase of the magnetic field signal component with the same frequency as the fluid pulsation are calculated based on the two DC components using a specific algorithm, and the amplitude is accurately output to the physical property analysis module to provide core data support for subsequent physical property parameter calculations.

[0036] The signal processing device, through its multi-type adaptability design to host computers, industrial PLCs, and embedded microprocessor systems, can flexibly match different application scenarios such as laboratory research, industrial field monitoring, and low-cost miniaturized deployment. Its built-in digital lock-in amplifier processing program, through a complete process of generating orthogonal reference signals, signal multiplication operations, low-pass filtering, and amplitude and phase calculation, can accurately extract weak magnetic field signal components with the same frequency as fluid pulsation from strong noise backgrounds, effectively suppressing environmental interference and irrelevant noise, ensuring the accuracy and stability of the output amplitude, providing reliable input data for the physical property analysis module, significantly improving the detection accuracy, anti-interference capability, and scenario adaptability of the entire fluid physical property analysis system, and ensuring the accuracy of physical property parameter calculation.

[0037] In specific application scenarios, the property-magnetic field correlation model is a quantitative correlation model established by calibrating the magnetic field amplitude multiple times on standard samples with different property parameter gradients. The property parameters include the concentration, purity, magnetic particle content, ion concentration or temperature of the fluid to be tested. The property analysis module 50 calls the property-magnetic field correlation model in real time, converts the amplitude of the received magnetic field signal component into the corresponding property parameters, and outputs them in a readable form.

[0038] In this embodiment of the present disclosure, the physical property-magnetic field correlation model can be established in advance by calibrating the magnetic field amplitude multiple times on standard samples with different physical property parameter gradients such as concentration and purity, so as to clarify the quantitative correspondence between the magnetic field signal component amplitude and various physical property parameters. After the physical property analysis module 50 receives the magnetic field signal component amplitude output by the signal processing device 40 in real time, it can immediately call the preset quantitative correlation model, and accurately convert the abstract magnetic field amplitude into the corresponding specific physical property parameter through the mathematical operation of the model. Finally, it outputs the parameter in a form that users can directly read, such as digital display and data upload, thus completing the complete conversion from magnetic field physical quantity to fluid core physical property index.

[0039] The physical property-magnetic field correlation model, based on the quantitative characteristics of multiple calibrations of standard samples, ensures the accuracy and reliability of the conversion of magnetic field amplitude to physical property parameters. Its design, encompassing multiple core physical property parameters, broadens the system's adaptability to different analytical needs. The physical property analysis module's ability to call the model in real time and output results in a readable format enables a crucial leap from magnetic field measurement to physical property analysis. This allows the system to directly provide end-users with the core data they require without additional secondary processing, significantly improving the system's practicality and ease of use. Simultaneously, it ensures the intuitiveness and operability of the analytical results, enabling the entire fluid physical property analysis system to quickly respond to detection needs in different scenarios and provide direct and reliable basis for decision-making.

[0040] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0041] Example 1: Precise Measurement of Blood Magnetic Field (Biomedical Application) I. Application Scenarios This embodiment is applied to the field of biomedical research, aiming to accurately measure the weak magnetic field generated by magnetic substances such as hemoglobin in human blood, and to provide basic data for non-invasive blood analysis and disease diagnosis (such as methemoglobinemia and hemosiderinosis).

[0042] II. System Configuration Pulsating flow generation device: Employs a high-precision peristaltic pump (model: LongerPump BT1002J) to simulate the pulsating characteristics of the human cardiovascular system, driving blood to flow in a biocompatible silicone tube (inner diameter: 3mm) to generate a sinusoidal pulsation with a frequency of approximately 1.2Hz (72 times / minute).

[0043] Flow rate sensing device: An ultrasonic flow meter (model: for example, Sensirion SLI1000) is used, which is tightly clamped to the outer wall of the silicone tube in a non-contact manner, and outputs a voltage signal that is proportional to the instantaneous blood flow rate as a reference signal in real time.

[0044] Magnetic sensing device: A miniaturized optical pump magnetometer (model: QuSpin QZFM) is used. Its probe is fixed 10mm above the pipe by a non-magnetic bracket to detect the magnetic field generated by blood flow and output the signal to be measured.

[0045] Signal processing unit: A host computer (PC) with digital lock-in amplification software installed. The ultrasonic flow meter and optical pump magnetometer are connected to the host computer via USB data acquisition cards.

[0046] Property analysis module: Implemented by the host computer. It contains pre-stored "hemoglobin concentration-magnetic field amplitude" curves (i.e., property-magnetic field correlation models) obtained by calibration with hemoglobin solutions of different concentrations.

[0047] III. Work Process 1. Start the peristaltic pump to create a steady pulsating flow of simulated blood (or anticoagulated whole blood) in the tubing.

[0048] 2. The ultrasonic flow meter continuously measures the flow rate and transmits the sinusoidal waveform reference signal to the host computer in real time.

[0049] 3. The optical pump magnetometer synchronously acquires magnetic field data and outputs the test signal, which includes blood magnetic field signal and environmental noise.

[0050] 4. The software in the host computer uses the flow velocity reference signal as the frequency reference and executes a digital lock-in amplification algorithm to calculate the precise amplitude of the blood magnetic field.

[0051] 5. The host computer invokes the calibration curve, calculates and displays the current hemoglobin concentration value. This achieves direct output from magnetic field measurement to physiological parameter analysis. Example 2: Online monitoring of chemical catalyst concentration (industrial process application) I. Application Scenarios This embodiment is applied to a chemical production process to monitor the concentration changes of magnetic nanocatalysts (such as Fe3O4) in the reaction solution online, thereby achieving real-time and precise control of the polymerization reaction process.

[0052] II. System Configuration Pulsating flow generation device: A chemically resistant diaphragm pump (e.g., ProMinent Gamma / 4) is used to introduce a stable pulsation at a frequency of 2Hz into the main circulation pipeline of the reaction liquid.

[0053] Flow velocity sensing device: A flange-type electromagnetic flow meter (model: for example, Endress+Hauser Promag 50) is used, which is in direct contact with the fluid and outputs a high-precision, high-response pulsating flow velocity signal as a reference signal.

[0054] Magnetic sensing device: An industrial-grade atomic magnetometer (model: for example, Scintrex SM5) is used, and its sensor probe is installed in a detection pool on the main pipeline via a bypass.

[0055] Signal processing unit: It adopts a high-performance signal processing module integrated with an industrial PLC (model: such as Siemens S71500) with a built-in fixed digital phase-locked amplifier program.

[0056] Property analysis module: integrated into the industrial PLC. The model is a linear relationship between catalyst concentration and magnetic field amplitude.

[0057] III. Work Process 1. A diaphragm pump superimposes a fixed pulsating component onto a continuously flowing reaction solution.

[0058] 2. The electromagnetic flowmeter detects this pulsating flow rate in real time and transmits a standard 420mA analog signal to the PLC as a reference signal.

[0059] 3. The atomic magnetometer continuously detects the magnetic field of the fluid flowing through the detection cell and outputs the signal to be measured to the signal processing module of the PLC.

[0060] 4. The processing module within the PLC performs lock-in amplification calculations to calculate the magnetic field amplitude, which is proportional to the catalyst concentration, in real time.

[0061] 5. The PLC calculates the catalyst concentration corresponding to the magnetic field amplitude in real time and uploads the data to the central control system for feedback control.

[0062] IV. Beneficial Effects This embodiment enables online, real-time monitoring of fluid catalyst concentration parameters in an industrial environment. The system is robust and has good anti-interference capabilities, providing a novel and direct technical means for optimized control and consistent product quality in process industries.

[0063] Example 3: Assessment of Corrosion Products in Circulating Cooling Water (Environmental and Equipment Monitoring Applications) I. Application Scenarios This embodiment is applied to the field of industrial equipment maintenance and environmental monitoring. By monitoring the changes in the content of ferromagnetic corrosion products (such as Fe2O3 and Fe3O4) in circulating cooling water over a long period of time, it can provide early warning of the corrosion status of the pipeline system and achieve predictive maintenance.

[0064] II. System Configuration Pulsating flow generation device: The flow fluctuations generated by the system's inherent centrifugal circulating pump serve as the pulsation source. A simple pulse generator valve can also be added.

[0065] Flow velocity sensing device: Clamp-on ultrasonic flow meter (model: for example, Fuji Electric FLR1000) is used, which is convenient for installation on existing pipelines without shutting down the system, and outputs a reference signal reflecting flow fluctuations.

[0066] Magnetic sensing device: A fluxgate magnetometer (model: for example, Bartington Mag03) is used. It is low in cost and sensitive enough to detect the magnetic field of microgram-level magnetic particles in water. The sensor is installed on the outer wall of the pipe.

[0067] Signal processing unit: Employs an embedded microprocessor system (such as an ARM Cortex M7 core) to run a simplified digital lock-in amplification algorithm.

[0068] The physical property analysis module is implemented by an embedded system. The model is a "magnetic field amplitude trend - corrosion risk" assessment model based on historical data.

[0069] III. Work Process 1. The system utilizes or introduces inherent pulsations in the cooling water circulation.

[0070] 2. The clamp-on ultrasonic flow meter detects the pulsating signal non-invasively and uses it as a reference signal.

[0071] 3. The fluxgate magnetometer detects the local magnetic field fluctuations caused by the accumulation of corrosive particles, which serve as the signal to be measured.

[0072] 4. The embedded system performs phase-locked amplification and records the long-term trend of the magnetic field amplitude.

[0073] 5. The embedded system calculates corrosion risk in real time, and issues an early warning of intensified corrosion when the risk continues to rise.

[0074] IV. Beneficial Effects This embodiment provides a low-cost, easy-to-deploy equipment status monitoring solution. It enables indirect, non-destructive monitoring of fluid quality without altering the existing piping layout, effectively preventing equipment failures caused by corrosion and extending system lifespan.

[0075] The three embodiments described above, based on different application fields, technical configurations, and cost considerations, fully demonstrate the novelty, inventiveness, and practicality of the fluid property analysis system of this invention. Those skilled in the art can make various modifications or variations based on the above embodiments according to actual needs, and these equivalent modifications also fall within the scope defined by the claims of this invention.

[0076] In summary, the fluid property analysis system provided by this invention generates periodic pulsating flow in the fluid under test through a pulsating flow generation device, giving the weak magnetic field signal a fixed frequency characteristic. Combined with the same source reference signal output by the flow velocity sensor and the suppression effect of the magnetic shielding device on environmental magnetic noise, the signal processing device performs phase-locked amplification processing based on the reference signal to accurately extract the weak magnetic field signal component that is submerged by noise and has the same frequency as the fluid pulsation and determine its amplitude. Finally, the property analysis module converts the magnetic field amplitude into fluid property parameters through a preset property-magnetic field correlation model. This system can perform non-destructive, online, and high-precision property analysis on various biological fluids and industrial process fluids in ordinary environments without extreme working conditions. It effectively solves the technical bottlenecks of traditional fluid property analysis methods, such as poor timeliness, susceptibility to interference, reliance on complex equipment, or inability to directly convert magnetic field signals into property parameters. It also has the advantages of high signal-to-noise ratio, reliable reference signal, and strong versatility.

[0077] Furthermore, to fully illustrate the implementation of this embodiment, this embodiment also provides a fluid property analysis method, which is applied to the above-mentioned fluid property analysis system, such as... Figure 2 As shown, the method includes: Step 210: Control the fluid to be tested to form a periodic pulsating flow in the flow pipe, and detect the weak magnetic field signal generated by the periodic pulsating flow of the fluid to be tested in real time, and use it as the test signal.

[0078] The test fluid is the target fluid whose physicochemical properties need to be analyzed, covering biological fluids (such as blood and lymph) and industrial process fluids (such as chemical raw materials, wastewater, and liquid metals). Its magnetism is inherently related to its composition, concentration, and other physical properties. The flow pipe is a dedicated channel carrying the flow of the test fluid, made of materials adapted to different fluid characteristics (such as biocompatible materials and chemically resistant materials), and equipped with specific detection sections, providing a stable and suitable carrier for fluid pulsation flow and magnetic field detection. Periodic pulsation flow refers to the fluid's alternating acceleration and deceleration within the pipe at a fixed frequency, giving the weak magnetic field generated by the fluid clear and stable frequency characteristics, providing a basis for subsequent signal locking and extraction. The weak magnetic field signal is the physical quantity of the magnetic field generated by the test fluid due to its own magnetic materials (such as hemoglobin, magnetic nanocatalysts, and ferromagnetic corrosion products), with an intensity typically within fT (…). ) to pT ( The signal is on the order of magnitude of 1000, which is easily masked by environmental magnetic noise. The signal to be measured is an electrical signal collected by a magnetic sensing device, which includes the weak magnetic field signal generated by the fluid to be measured, as well as irrelevant signals such as environmental magnetic noise and interference from electronic equipment. It is the original input for subsequent signal processing.

[0079] In the embodiments of this disclosure, the fluid to be tested can be driven or controlled by a pulsating flow generation device (such as a peristaltic pump, diaphragm pump, etc.) adapted to the scenario, so that it forms a periodic pulsating flow with a stable frequency in a dedicated flow channel. This gives the originally random weak magnetic field of the fluid a periodic characteristic consistent with the pulsating frequency. Then, a high-sensitivity magnetic sensing device is used to capture the weak magnetic field generated by the periodic pulsating flow of the fluid in real time in the pipeline detection section, convert it into an electrical signal containing the target signal and interference noise, and use the electrical signal as the test signal for subsequent processing, thus completing the continuous process from fluid flow control to original signal acquisition.

[0080] By controlling the fluid to form a periodic pulsating flow, a recognizable frequency identifier can be given to weak magnetic field signals, solving the core problem that the natural weak magnetic field of fluid is difficult to distinguish from environmental noise. At the same time, the real-time detection method can ensure the timeliness of signal acquisition and avoid the lag of offline analysis. The entire process does not require direct contact with the fluid (or only requires non-invasive contact), which can realize non-destructive testing. It will not contaminate or change the fluid properties, and can adapt to the detection needs of different types of fluids. It can lay a key foundation for subsequent extraction of effective signals through lock-in amplification and high-precision physical property analysis, and can significantly improve the pertinence and reliability of weak magnetic field detection.

[0081] Step 220: Detect the pulsating flow velocity of the fluid under test in real time and output a reference signal associated with the pulsating flow velocity.

[0082] In this embodiment of the present disclosure, a suitable flow velocity sensing device (ultrasonic flow meter or electromagnetic flow meter) can be selected according to the type of fluid to be measured (such as corrosivity, biocompatibility requirements), installation space constraints, and detection accuracy requirements. The clamp-on ultrasonic flow meter is tightly clamped to the outer wall of the flow pipe in a non-contact manner, while the flange-type electromagnetic flow meter is fixed to the pipe through a flange and directly contacts the fluid. After the device is started, it captures the periodic pulsating flow velocity changes of the fluid to be measured in real time and converts them into an electrical signal that is proportional to the instantaneous pulsating flow velocity. This electrical signal is the reference signal required for subsequent signal processing, realizing the coherent conversion from the physical quantity of flow velocity to the standard electrical signal.

[0083] Real-time detection mode ensures the timeliness of pulsating flow velocity data, avoiding frequency or phase mismatch issues caused by signal lag. The strict correlation between the reference signal and the pulsating flow velocity ensures the accuracy and reliability of the frequency and phase references for subsequent lock-in amplification, effectively avoiding errors that may be introduced by external reference signals. The multi-type adaptability design of the flow velocity sensing device can meet the mild requirements of non-invasive detection and adapt to high-precision industrial scenarios, significantly improving the scenario compatibility of the technical solution and laying a key foundation for the high sensitivity and high accuracy of the entire fluid property analysis system.

[0084] Step 230: Using the reference signal as the frequency and phase reference, perform phase-locked amplification on the signal to be measured, extract the magnetic field signal component with the same frequency as the fluid pulsation, and output the amplitude of the magnetic field signal component.

[0085] In this embodiment of the present disclosure, a signal processing device can be used to receive the reference signal output by the flow velocity sensor. Using the frequency and phase of the signal as a precise reference, a built-in digital phase-locked amplification program is started to generate a pair of orthogonal sinusoidal reference signals with the same frequency and a 90° phase difference. Subsequently, the noisy test signal collected by the magnetic sensor is multiplied by the pair of orthogonal reference signals to obtain a product signal containing sum frequency and difference frequency components. Then, a low-pass filter is used to filter out high-frequency noise and sum frequency components, retaining a stable DC component. Finally, the amplitude of the magnetic field signal component with the same frequency as the fluid pulsation is calculated based on the two DC components, and the amplitude is output as valid data to the subsequent modules.

[0086] By using a reference signal originating from the same source as the fluid pulsation as the frequency and phase reference, and combining the narrowband filtering characteristics of lock-in amplification, irrelevant signals such as environmental magnetic noise and electromagnetic interference can be suppressed to a great extent. This allows for the accurate capture of weak magnetic field signal components on the order of fT-pT that are submerged by noise, significantly improving the signal-to-noise ratio. At the same time, this processing ensures that the output amplitude corresponds precisely to the effective magnetic field signal, avoiding errors caused by frequency mismatch or phase deviation. This provides reliable data support for the accurate calculation of subsequent physical property parameters, ensuring the high-precision detection capability of the entire analysis system.

[0087] Step 240: Based on the amplitude of the magnetic field signal component, call the preset physical property-magnetic field correlation model to calculate and output the physical property parameters of the fluid under test.

[0088] In this embodiment of the present disclosure, after receiving the amplitude of the magnetic field signal component output by the signal processing device using the property analysis module, the internally pre-set property-magnetic field correlation model, which has been established through multiple calibrations of standard samples, can be immediately invoked. Through the quantitative correspondence between the magnetic field amplitude and the property parameters in the model, precise calculations are performed, transforming the abstract magnetic field strength data into specific and interpretable fluid property parameters such as concentration and magnetic particle content. Finally, the analysis results are output to the user in an intuitive and readable form such as digital display, data upload, or report output, completing the closed-loop transformation from magnetic field physical quantities to core fluid property indicators.

[0089] The pre-built physical property-magnetic field correlation model, based on the quantitative characteristics of standard sample calibration, ensures the accuracy and repeatability of the conversion of magnetic field amplitude into physical property parameters, avoiding subjective errors. The real-time model call operation ensures the timeliness of the analysis. Combined with the signal acquisition and processing flow described above, it enables online real-time analysis of fluid properties. The model design, which covers multiple core physical property parameters, and the calibration logic adapted to different fluid types, can broaden the application scenarios of the technical solution. At the same time, the direct output of specific physical property parameters eliminates the need for secondary processing by the user, which can significantly improve the practicality and ease of use of the technology and provide a direct and reliable basis for subsequent decision-making.

[0090] In summary, the fluid property analysis method provided in this application controls the fluid under test to form a periodic pulsating flow in a flow pipe and simultaneously collects the weak magnetic field generated by it as the test signal. At the same time, it detects the pulsating flow velocity of the fluid in real time and outputs a correlated reference signal. Using this reference signal as the frequency and phase reference, the test signal containing environmental noise is amplified by phase lock-in processing. The target magnetic field signal component with the same frequency as the fluid pulsation is accurately extracted and its amplitude is determined. Finally, a preset property-magnetic field correlation model is called to convert the magnetic field amplitude into specific property parameters. This method can effectively overcome the technical bottlenecks of weak magnetic fields of fluids being submerged by environmental noise, poor timeliness of traditional analysis methods, susceptibility to interference, or inability to directly convert magnetic field signals into property parameters. It can achieve non-destructive, online, and high-precision analysis of the physical and chemical properties of various fluids, and has significant advantages such as reliable reference signals, strong anti-interference ability, and wide applicability.

[0091] Based on the above, Figure 2 Accordingly, this embodiment also provides a storage medium storing a computer program that, when executed by a processor, implements the above-described method. Figure 2 The fluid property analysis method shown.

[0092] Based on this understanding, the technical solution of this application can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (such as CD-ROM, USB flash drive, mobile hard drive, etc.) and includes several instructions to cause an electronic device (such as personal computer, server, or network device, etc.) to execute the methods of various implementation scenarios of this application.

[0093] Based on the above, Figure 2 To achieve the above objectives, this application also provides an electronic device, specifically a personal computer, tablet computer, server, or other network device, etc. This device includes a storage medium and a processor; the storage medium stores a computer program; the processor executes the computer program to achieve the above-described objectives. Figure 2 The fluid property analysis method shown.

[0094] Optionally, the aforementioned physical devices may also include a user interface, a network interface, a camera, radio frequency (RF) circuitry, sensors, audio circuitry, a Wi-Fi module, etc. The user interface may include a display screen, input units such as a keyboard, etc., and optional user interfaces may also include USB interfaces, card reader interfaces, etc. The network interface may optionally include standard wired interfaces, wireless interfaces (such as Wi-Fi interfaces), etc.

[0095] Those skilled in the art will understand that the physical device structure provided in this embodiment does not constitute a limitation on the physical device, and may include more or fewer components, or combine certain components, or have different component arrangements.

[0096] The storage medium may also include an operating system and a network communication module. The operating system is a program that manages the hardware and software resources of the aforementioned physical device, supporting the operation of information processing programs and other software and / or programs. The network communication module is used to enable communication between the various components within the storage medium, as well as communication with other hardware and software in the information processing physical device.

[0097] Through the above description of the embodiments, those skilled in the art can clearly understand that this application can be implemented by means of software plus necessary general-purpose hardware platform, or it can be implemented by hardware.

[0098] This solution uses a pulsating flow generator to induce periodic pulsating flow in the fluid under test, giving the weak magnetic field signal a fixed frequency characteristic. Combined with the reference signal output from the flow velocity sensor and the suppression of environmental magnetic noise by the magnetic shielding device, the signal processing unit performs phase-locked amplification based on the reference signal to accurately extract the weak magnetic field signal component that is submerged by noise and has the same frequency as the fluid pulsation, and determine its amplitude. Finally, the physical property analysis module converts the magnetic field amplitude into fluid physical property parameters through a preset physical property-magnetic field correlation model. This solution enables non-destructive, online, and high-precision physical property analysis of various biological fluids and industrial process fluids under normal conditions without extreme working conditions. It effectively solves the technical bottlenecks of traditional fluid physical property analysis methods, such as poor timeliness, susceptibility to interference, reliance on complex equipment, or inability to directly convert magnetic field signals into physical property parameters. It also has the advantages of high signal-to-noise ratio, reliable reference signal, and strong versatility.

[0099] Those skilled in the art will understand that the accompanying drawings are merely schematic diagrams of a preferred embodiment, and the modules or processes shown in the drawings are not necessarily essential for implementing this application. Those skilled in the art will understand that the modules in the apparatus of the embodiment can be distributed within the apparatus of the embodiment as described, or can be modified to be located in one or more apparatuses different from this embodiment. The modules of the above-described embodiment can be combined into one module, or further divided into multiple sub-modules.

[0100] The serial numbers in this application are for descriptive purposes only and do not represent the superiority or inferiority of any particular implementation scenario. The above disclosures are merely a few specific implementation scenarios of this application; however, this application is not limited thereto, and any variations conceived by those skilled in the art should fall within the protection scope of this application.

Claims

1. A fluid property analysis system, characterized in that, include; A pulsating flow generator is used to control the periodic pulsating flow of the fluid under test in a flow channel. A flow rate sensing device is used to detect the pulsating flow rate of the fluid under test in real time and output a reference signal associated with the pulsating flow rate. A magnetic sensing device is used to detect in real time the weak magnetic field signal generated by the periodically pulsating fluid under test, and to use it as the signal to be measured. A signal processing device, wherein its reference input terminal is connected to the flow velocity sensing device and its signal input terminal is connected to the magnetic sensing device, the signal processing device is configured to perform phase-locked amplification processing on the signal to be measured using the reference signal as a frequency and phase reference, extract the magnetic field signal component with the same frequency as the fluid pulsation, and output the amplitude of the magnetic field signal component. The physical property analysis module is connected to the signal processing device. The physical property analysis module stores a preset physical property-magnetic field correlation model, which is used to calculate and output the physical property parameters of the fluid under test based on the amplitude of the magnetic field signal component through the physical property-magnetic field correlation model. A magnetic shielding device is used to at least partially enclose the detection section of the flow pipe and the magnetic sensing device to reduce the interference of environmental magnetic noise on the detection of weak magnetic fields.

2. The fluid property analysis system according to claim 1, characterized in that, The pulsating flow generating device is any one of a peristaltic pump, a piston pump, or a diaphragm pump, or it can be a pulsating source formed by the inherent flow fluctuation of the original system where the fluid to be measured is located, or a pulsating source composed of a pulse generator valve installed on the flow pipeline. The pulsating flow generating device is connected to the flow pipe and is used to drive the fluid under test to form a periodic pulsating flow, or to superimpose periodic pulsating components in the continuous flow of the fluid under test.

3. The fluid property analysis system according to claim 1, characterized in that, The flow velocity sensing device is an ultrasonic flow meter or an electromagnetic flow meter. The ultrasonic flow meter is a non-contact clamp-on ultrasonic flow meter, which is tightly clamped to the outer wall of the flow pipe to detect pulsating flow velocity in a non-invasive manner. The electromagnetic flowmeter is a flange-type electromagnetic flowmeter that is in direct contact with the fluid to be measured. The flow velocity sensing device outputs an electrical signal that is proportional to the instantaneous pulsating flow velocity as the reference signal.

4. The fluid property analysis system according to claim 1, characterized in that, The magnetic sensing device is any one of a fluxgate magnetometer, an optically pumped magnetometer, a SQUID magnetometer, and an atomic magnetometer. When the magnetic sensing device is an optically pumped magnetometer or an atomic magnetometer, the magnetic sensing device operates in gradiometer mode. When the magnetic sensing device is a SQUID magnetometer or an atomic magnetometer, the magnetic sensing device is set in a magnetically shielded environment. The magnetic sensing device is fixed to the outside of the detection section of the flow pipe by a non-magnetic bracket, or installed above / around the detection pool of the flow pipe by a bypass, with its detection end facing the flow area of ​​the fluid to be tested, for collecting the weak magnetic field signal generated by the fluid to be tested.

5. The fluid property analysis system according to claim 1, characterized in that, The magnetic shielding device is an integrated magnetic shielding chamber, and the detection section of the flow pipe and the detection part of the magnetic sensing device are both located inside the integrated magnetic shielding chamber; or, The magnetic shielding device is a partial magnetic shielding structure, which only covers the detection end of the magnetic sensing device and the fluid detection area corresponding to the flow pipe.

6. The fluid property analysis system according to claim 1, characterized in that, The signal processing device can be any one of a host computer, industrial PLC, or embedded microprocessor system, and it has a built-in digital lock-in amplifier processing program, specifically configured as follows: Receive the reference signal output by the flow velocity sensing device and generate a pair of orthogonal sinusoidal reference signals; The signal to be measured output by the magnetic sensing device is multiplied by the pair of orthogonal reference signals to obtain two product signals. The two product signals are subjected to low-pass filtering to remove AC noise components, resulting in two DC components. The amplitude and phase of the magnetic field signal component that is in sync with the fluid pulsation are calculated based on the two DC components, and the amplitude is output to the physical property analysis module.

7. The fluid property analysis system according to claim 1, characterized in that, The property-magnetic field correlation model is a quantitative correlation model established by calibrating the magnetic field amplitude multiple times on standard samples with different property parameter gradients. The property parameters include the concentration, purity, magnetic particle content, ion concentration, or temperature of the fluid to be tested. The property analysis module calls the property-magnetic field correlation model in real time, converts the amplitude of the received magnetic field signal component into the corresponding property parameter, and outputs it in a readable form.

8. A method for analyzing fluid properties, characterized in that, The method is applied to the fluid property analysis system according to any one of claims 1 to 7, comprising: The test fluid is controlled to form a periodic pulsating flow in the flow pipe, and the weak magnetic field signal generated by the periodic pulsating flow of the test fluid is detected in real time and used as the test signal. The pulsating flow velocity of the fluid under test is detected in real time, and a reference signal associated with the pulsating flow velocity is output. Using the reference signal as a frequency and phase reference, the signal under test is subjected to phase-locked amplification to extract the magnetic field signal component with the same frequency as the fluid pulsation, and the amplitude of the magnetic field signal component is output. Based on the amplitude of the magnetic field signal component, a preset property-magnetic field correlation model is invoked to calculate and output the property parameters of the fluid under test.

9. A storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the method of claim 8.

10. An electronic device comprising a storage medium, a processor, and a computer program stored on the storage medium and executable on the processor, characterized in that, The processor implements the method of claim 8 when executing the computer program.

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