Liquid density measuring system

Abstract

The utility model provides a liquid density measuring system. The liquid density measuring system comprises a base, a fixing part, a measuring cell, a driving electronic device, an acquisition electronic device and a controller, the measuring cell is fixed on the base, the fixing part is arranged above the base, and the measuring cell is filled with liquid to be measured; the driving electronic device and the controller are located below the measuring cell and mounted on the base, and the driving electronic device is in contact with the measuring cell; the driving electronic device is connected with the controller, receives a driving signal sent by the controller, vibrates and drives the measuring cell to vibrate; the collecting electronic device is arranged on the periphery of the measuring cell and connected with the controller, the collecting electronic device sends the measured vibration frequency of the measuring cell to the controller, and the controller determines the liquid density of the liquid to be measured according to the vibration frequency by means of the corresponding relation between the vibration frequency input in advance and the liquid density. The measuring system ensures the precision, overcomes the influence of high-viscosity liquid, and improves the reliability and accuracy of data.

Description

Technical Field

[0001] This utility model relates to the field of liquid density measurement technology, and in particular to a liquid density measurement system. Background Technology

[0002] In modern testing, inspection, and laboratory liquid density measurement, accuracy and viscosity range are crucial indicators of instrument performance. Currently, most liquid density meters on the market have an accuracy of only ±0.2 kg / m³, and cannot achieve accurate measurements in high-viscosity liquids (such as those exceeding 300 cp). These limitations in accuracy and measurement range mean that existing technologies cannot meet the demands of many high-precision applications, especially in fields involving complex chemical experiments or the analysis of high-viscosity liquids.

[0003] Current liquid density measurement techniques primarily rely on principles such as buoyancy and differential pressure. However, the buoyancy method is unstable in measuring high-density or high-viscosity liquids, failing to guarantee high accuracy. Meanwhile, the differential pressure method has high requirements for the fluidity and homogeneity of the liquid; uneven flow or the presence of air bubbles will introduce significant errors in the measurement results. Therefore, in many environments requiring high-precision liquid density measurement (such as in the chemical, pharmaceutical, and petrochemical industries), existing instruments often cannot provide accurate density values, severely impacting the reliability of experimental data and the accuracy of experimental results.

[0004] Therefore, there is an urgent need to develop a new liquid density measuring instrument that can overcome the influence of high-viscosity liquids while ensuring measurement accuracy, and meet higher accuracy requirements. Utility Model Content

[0005] In view of this, the present invention provides a liquid density measurement system to solve the problem of low accuracy in liquid density measurement.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] This utility model discloses a liquid density measurement system, which includes: a base, a fixing component, a measuring pool, a driving electronic device, a data acquisition electronic device, and a controller;

[0008] The measuring cell is fixed to the base, the fixing component is disposed above the base, and the measuring cell is filled with the liquid to be tested;

[0009] The driving electronics and the controller are located below the measuring cell and mounted on the base, with the driving electronics in contact with the measuring cell;

[0010] The driving electronics are connected to the controller. The driving electronics receive the driving signal sent by the controller to vibrate and drive the measuring cell to vibrate.

[0011] The acquisition electronic device is located around the periphery of the measuring pool and connected to the controller. The acquisition electronic device sends the measured vibration frequency of the measuring pool to the controller, which uses the pre-input correspondence between the vibration frequency and the liquid density to determine the liquid density of the liquid to be tested based on the vibration frequency.

[0012] Preferably, the measuring cell includes an oscillating U-shaped tube, a reference tube, and a glass protective cover;

[0013] The glass protective cover is horizontally mounted on the base;

[0014] The glass protective cover has a hollow structure, and the horizontally fixed oscillating U-shaped tube and the reference tube are sealed inside the glass protective cover;

[0015] The inlet and outlet of the oscillating U-tube are located on one side of the glass protective cover, and the inlet and outlet of the oscillating U-tube are used to inject and discharge the liquid to be tested.

[0016] The reference tube compensates for the elastic modulus of the oscillating U-shaped tube into which the liquid to be tested is injected.

[0017] Preferably, the fixing component includes an upper seat and a fixing plate for fixing the measuring cell;

[0018] The upper seat is disposed above the base, and the upper seat is fixed to both sides of the measuring pool;

[0019] The fixing plate is disposed on the outer surface of the measuring cell.

[0020] Preferably, the electronic device for data acquisition includes: a first vibration sensor, a second vibration sensor, a signal acquisition module, and an analog-to-digital signal acquisition module;

[0021] The first vibration sensor and the second vibration sensor are respectively disposed below the upper seat and placed on the base;

[0022] The first vibration sensor and the second vibration sensor are respectively in contact with the measuring cell;

[0023] The first vibration sensor and the second vibration sensor are respectively connected to the signal acquisition module;

[0024] The signal acquisition module is connected to the analog-to-digital signal acquisition module;

[0025] The analog-to-digital signal acquisition module is connected to the controller.

[0026] Preferably, the driving electronic device includes: a digital-to-analog signal generation module, a driving amplification module, and a driving oscillation transducer;

[0027] The controller is connected to the digital-to-analog signal generation module;

[0028] The digital-to-analog signal generation module is connected to one end of the drive amplification module;

[0029] The other end of the drive amplification module is connected to the drive oscillation transducer;

[0030] The driving oscillation transducer is in contact with the measuring cell.

[0031] Preferably, it also includes: a temperature control module, a temperature acquisition module, a first temperature sensor, and a second temperature sensor;

[0032] The temperature control module is located below the base;

[0033] The first temperature sensor is disposed inside the measuring cell;

[0034] The second temperature sensor is disposed inside the base;

[0035] The first temperature sensor and the second temperature sensor are connected to the temperature acquisition module;

[0036] The temperature acquisition module is connected to the controller.

[0037] Preferably, the first temperature sensor and the second temperature sensor are platinum resistance temperature sensors or thermistors.

[0038] Preferably, the first vibration sensor and the second vibration sensor are specifically electromagnetic capture transducers or infrared capture transducers.

[0039] Preferably, the driving oscillation transducer is specifically an electromagnetic drive sensor, a piezoelectric ceramic drive sensor, or other vibration signal drive sensor.

[0040] Preferably, the driving amplification module is an operational amplifier.

[0041] A liquid density measurement system based on the above-described embodiment of the present invention includes: a base, a fixing component, a measuring cell, a driving electronic device, a data acquisition electronic device, and a controller. The measuring cell is fixed to the base, and the fixing component is positioned above the base. The measuring cell is filled with the liquid to be measured. The driving electronic device and the controller are located below the measuring cell and mounted on the base, with the driving electronic device in contact with the measuring cell. The driving electronic device is connected to the controller, receiving a driving signal from the controller to vibrate and drive the measuring cell to vibrate. The data acquisition electronic device is positioned around the measuring cell and connected to the controller. The data acquisition electronic device sends the measured vibration frequency of the measuring cell to the controller, which uses a pre-inputted correlation between the vibration frequency and the liquid density to determine the liquid density of the liquid to be measured based on the vibration frequency. This measurement system ensures measurement accuracy, overcomes the influence of high-viscosity liquids, and effectively improves the reliability and accuracy of experimental data. Attached Figure Description

[0042] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0043] Figure 1 A first structural schematic diagram of a liquid density measurement system provided in an embodiment of this utility model;

[0044] Figure 2 A second structural schematic diagram of a liquid density measurement system provided in an embodiment of this utility model;

[0045] Figure 3 A third structural schematic diagram of a liquid density measurement system provided in an embodiment of this utility model;

[0046] Figure 4 A schematic diagram of the data flow of a liquid density measurement system provided in this embodiment of the present invention;

[0047] Wherein, 1 is the base; 2 is the fixing component; 3 is the measuring cell; 4 is the driving electronic device; 5 is the data acquisition electronic device; 6 is the controller; 21 is the upper seat; 22 is the fixing plate; 31 is the oscillating U-tube; 32 is the reference tube; 33 is the glass protective cover; 311 is the liquid inlet / outlet; 51 is the first vibration sensor; 52 is the second vibration sensor; 53 is the signal acquisition module; 54 is the analog-to-digital signal acquisition module; 41 is the digital-to-analog signal generation module; 42 is the driving amplification module; 43 is the driving oscillation transducer; 7 is the temperature control module; 8 is the temperature acquisition module; 9 is the first temperature sensor; and 10 is the second temperature sensor. Detailed Implementation

[0048] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0049] In this application, the terms "comprising," "including," or any other variations thereof are intended to cover a 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.

[0050] As the background technology indicates, most liquid density meters currently have an accuracy of only ±0.2 kg / m³, and cannot accurately measure high-viscosity liquids (such as those with a viscosity exceeding 300 cp). This limitation in accuracy and measurement range prevents existing technologies from meeting the high-precision requirements of applications, especially in complex chemical experiments and the analysis of high-viscosity liquids.

[0051] Therefore, this utility model provides a liquid density measurement system, including: a base, a fixing component, a measuring cell, a driving electronic device, a data acquisition electronic device, and a controller. The measuring cell is fixed on the base, and the fixing component is located above the base. The measuring cell is filled with the liquid to be measured. The driving electronic device and the controller are located below the measuring cell and mounted on the base. The driving electronic device is in contact with the measuring cell. The driving electronic device is connected to the controller and receives a driving signal sent by the controller to vibrate, thereby causing the measuring cell to vibrate. The data acquisition electronic device is located around the measuring cell and connected to the controller. The data acquisition electronic device sends the measured vibration frequency of the measuring cell to the controller. The controller uses the pre-input correspondence between the vibration frequency and the liquid density to determine the liquid density of the liquid to be measured based on the vibration frequency. This measurement system ensures measurement accuracy, overcomes the influence of high-viscosity liquids, and effectively improves the reliability and accuracy of experimental data.

[0052] See Figure 1 The diagram shows a first structural schematic of a liquid density measurement system provided in an embodiment of the present invention.

[0053] The measurement system includes: a base 1, a fixing component 2, a measuring cell 3, a driving electronic component 4, a data acquisition electronic component 5, and a controller 6.

[0054] Specifically, the measuring cell 3 is fixed on the base 1, the fixing component 2 is set above the base 1, and the measuring cell 3 is filled with the liquid to be tested.

[0055] Understandably, the base 1 and the fixing component 2 are used to support and fix the measuring pool 3.

[0056] In practical applications, base 1 can also be used to isolate resonance.

[0057] The base 1 is made of a metal with high thermal conductivity, which can effectively improve the thermal stability of the measuring cell 3 while isolating resonance, reducing the impact of temperature fluctuations on the measurement results, thereby improving the measurement accuracy.

[0058] It should be noted that, in combination Figure 2 As shown, the fixing component 2 includes an upper seat 21 and a fixing plate 22 for fixing the measuring pool.

[0059] Specifically, the upper seat 21 is positioned above the base 1 and is fixed to both sides of the measuring pool 3; the fixing plate 22 is positioned on the outer surface of the measuring pool 3.

[0060] During application, the fixing plate 22 can also conduct heat to the measuring cell 3.

[0061] It should be noted that, in combination Figure 1 As shown, the drive electronics 4 and controller 6 are located below the measuring cell 3 and mounted on the base 1, with the drive electronics 4 in contact with the measuring cell 3.

[0062] It is understandable that the driving electronic device 4 is connected to the controller 6. The driving electronic device 4 receives the driving signal sent by the controller 6 to vibrate and drive the measuring cell 3 to vibrate.

[0063] Specifically, the drive electronics 4 and the controller 6 can be wirelessly connected or wired connected.

[0064] Controller 6 can specifically be a digital signal processor main control module.

[0065] Understandably, the acquisition electronic device 5 is set on the periphery of the measuring cell 3 and connected to the controller 6. The acquisition electronic device 5 sends the measured vibration frequency of the measuring cell 3 to the controller 6. The controller 6 uses the pre-input correspondence between the vibration frequency and the liquid density to determine the liquid density of the liquid to be measured based on the vibration frequency.

[0066] It should be noted that the controller 6 uses the existing signal processing mode to send a drive signal to the drive electronics 4; the drive electronics 4 vibrates based on the drive signal, thereby causing the measuring cell 3 to vibrate. At this time, the acquisition electronics 5, located around the measuring cell 3, measures the vibration frequency of the measuring cell 3 and sends it to the controller 6. The controller 6 determines the liquid density of the liquid to be measured in the measuring cell 3 based on the existing relationship between liquid density and resonant frequency, and according to the vibration frequency sent by the acquisition electronics 5.

[0067] It is well known that, under the same temperature conditions, the relationship between the density of the liquid being measured and the resonant frequency of the vibration sensor can be expressed as (as shown in Equation 1):

[0068] ρ=AP 2 +B(1)

[0069] Where: ρ represents the density of the liquid to be measured; P represents the resonance period of the liquid sensor (such as the acquisition electronics 5 in this application); and A and B are constant coefficients.

[0070] In this embodiment of the invention, a measuring cell is fixed by a base and a fixing component. The measuring cell is filled with the liquid to be tested. The controller uses existing signal processing methods to drive the electronic components to vibrate, thereby causing the measuring cell to vibrate. The vibration frequency of the measuring cell is collected by the electronic components. Based on the existing relationship between the vibration frequency and the liquid density, the controller determines the density of the liquid to be tested. This measurement system not only ensures measurement accuracy but also overcomes the influence of high-viscosity liquids, meeting higher precision requirements and thus effectively improving the reliability and accuracy of experimental data.

[0071] The following is combined with Figures 2 to 4 The contents shown provide a more detailed introduction to this measurement system.

[0072] See Figure 3 As shown, the measuring cell 3, as a unit module for liquid density measurement, includes an oscillating U-shaped tube 31, a reference tube 32, and a glass protective cover 33.

[0073] Specifically, the glass protective cover 33 is horizontally mounted on the base 1.

[0074] The glass protective cover 33 has a hollow structure, and a horizontally fixed oscillating U-shaped tube 31 and a reference tube 32 are sealed inside the glass protective cover 33.

[0075] In addition, the inlet and outlet ports 311 of the oscillating U-tube 31 are located on one side of the glass protective cover 33, and the inlet and outlet ports 311 of the oscillating U-tube 31 are used to inject and discharge the liquid to be tested.

[0076] It should be noted that the oscillating U-tube 31 is the main component for measuring liquid density. When different liquids are injected into the oscillating U-tube 31, the oscillating U-tube 31 will generate different natural frequencies / resonance frequencies due to the different densities of the liquids being measured.

[0077] It is understandable that by adding a glass protective cover 33 to the outside of the oscillating U-tube 31 and the reference tube 32, the damping fluctuations caused by changes in external air density and humidity can be prevented, thus ensuring the accuracy and efficiency of temperature balance and the stability of the internal structure.

[0078] Furthermore, the oscillating U-shaped tube 31, the reference tube 32, and the glass protective cover 33 in the measuring cell 3 are set on the base 1, which effectively utilizes the mass counterweight of the base 1 to reduce or even eliminate the vibration transmission of non-vibrating units caused by the driving oscillation, thereby achieving resonance stability.

[0079] Specifically, the reference tube 32 compensates for the elastic modulus of the oscillating U-tube 31 into which the liquid to be tested is injected.

[0080] It should be noted that the oscillating U-tube 31 will gradually age due to the effects of high and low temperatures and the use time, which will change the elastic modulus of the U-tube material and thus change the frequency, leading to problems with measurement accuracy. In order to solve this problem, this embodiment of the utility model uses the reference tube 32 for elastic modulus compensation.

[0081] Understandably, the elastic modulus of the oscillating U-tube 31 and the reference tube 32 will change with temperature. After the liquid to be tested is injected, the elastic modulus of the oscillating U-tube 31 will be affected by the liquid, while the reference tube 32 will not be affected. The change in the elastic modulus of the reference tube 32 with temperature can offset the change in the elastic modulus of the oscillating U-tube 31 caused by temperature change; therefore, only the change in elastic modulus caused by the liquid to be tested needs to be addressed.

[0082] According to existing vibration theory, there is a relationship between the vibration frequency f of the oscillating U-tube 31 and the elastic modulus E of the oscillating U-tube 31. The relationship between density and frequency is the source of the formula for establishing the relationship between density and frequency (i.e., the formula (1) above). Since the elastic modulus of glass tubes changes due to aging during long-term use, automatic density compensation can be achieved by monitoring the characteristic parameters of the elastic modulus (through proportional comparison and fitting).

[0083] Furthermore, the reference tube 32 can also be used to compensate for changes in the environmental conditions and aging of the measuring cell. In other words, the mass of the measuring cell (such as elastic modulus and damping state) can be determined based on the vibration frequency state of the reference tube 32, which helps to improve the real-time accuracy of the measurement.

[0084] See Figure 2 As shown, the electronic device 5 for data acquisition includes: a first vibration sensor 51, a second vibration sensor 52, a signal acquisition module 53, and an analog-to-digital signal acquisition module 54.

[0085] Specifically, the first vibration sensor 51 and the second vibration sensor 52 are respectively located below the upper seat 21 and placed on the base 1.

[0086] The first vibration sensor 51 and the second vibration sensor 52 are in contact with the measuring cell 3. The first vibration sensor 51 and the second vibration sensor 52 are connected to the signal acquisition module 53.

[0087] Specifically, in combination Figure 3 As shown, the first vibration sensor 51 collects the vibration frequency of the reference tube 32 in the measuring cell 3, converts the vibration signal into an electrical signal, and transmits it to the signal acquisition module 53.

[0088] The second vibration sensor 52 collects the vibration frequency of the oscillating U-shaped tube 31 in the measuring cell 3, converts the vibration signal into an electrical signal, and transmits it to the signal acquisition module 53.

[0089] Specifically, in combination Figure 4 As shown, signal acquisition module 53 is connected to analog-to-digital signal acquisition module 54. Analog-to-digital signal acquisition module 54 is connected to controller 6.

[0090] Understandably, the controller 6 receives the vibration frequency of the reference tube 32 and the vibration frequency of the oscillating U-tube 31 from the first vibration sensor 51 and the second vibration sensor 52 via the signal acquisition module 53 and the analog-to-digital signal acquisition module 54.

[0091] In practical applications, the first vibration sensor 51 and the second vibration sensor 52 are specifically electromagnetic capture transducers, infrared capture transducers, or other oscillation capture transducers.

[0092] Combination Figure 2 and Figure 3 As shown, the driving electronic device 4 includes: a digital-to-analog signal generation module 41, a driving amplification module 42, and a driving oscillation transducer 43.

[0093] It is understandable that the driving electronic device 4 is located below the measuring cell 3. When powered on, the driving electronic device 4 vibrates. As the driving electronic device 4 vibrates and comes into contact with the measuring cell 3, it drives the measuring cell 3 to vibrate. The density of the liquid to be measured inside the oscillating U-tube 31 is determined based on the vibration frequency of the reference tube 32 and the vibration frequency of the oscillating U-tube 31 in the measuring cell 3.

[0094] Specifically, in combination Figure 4As shown, controller 6 is connected to analog-to-digital signal generation module 41. Analog-to-digital signal generation module 41 is connected to one end of drive amplification module 42. The other end of drive amplification module 42 is connected to drive oscillation transducer 43.

[0095] It should be noted that the driving oscillation transducer 43 is in contact with the measuring cell 3.

[0096] In some specific embodiments, the driving oscillation transducer 43 is specifically an electromagnetic driving sensor, a piezoelectric ceramic driving sensor, or other vibration signal driving sensor.

[0097] In practical applications, the driver amplifier module 42 is specifically an operational amplifier. The driver amplifier module 42 is mainly used to implement impedance matching conversion and filtering functions.

[0098] It should be noted that, since the reference tube 32 and the oscillating U-tube 31 have different vibration frequencies, in order to ensure the mass compensation of the measuring cell 3, the reference tube 32 and the oscillating U-tube 31 are driven to vibrate simultaneously by driving the oscillating transducer 43.

[0099] Understandably, the drive oscillating transducer 43 converts electrical signals into mechanical vibrations to drive the reference tube 32 and the oscillating U-tube 31 to vibrate.

[0100] In practical applications, the vibration waveforms of the reference tube 32 and the oscillating U-tube 31 are superimposed while maintaining a certain amplitude ratio to form a carrier drive design, which helps to ensure that the drive system can oscillate stably.

[0101] In some specific embodiments, combined with Figure 3 As shown, the measurement system also includes: a temperature control module 7, a temperature acquisition module 8, a first temperature sensor 9, and a second temperature sensor 10.

[0102] Specifically, the temperature control module 7 is located below the base 1.

[0103] In practical applications, the temperature control module 7 is specifically a Peltier or other existing temperature control module. The temperature control module 7 is used to control the measuring cell 3 to reach the set temperature and maintain balance.

[0104] Specifically, the first temperature sensor 9 is located inside the measuring pool 3. The second temperature sensor 10 is located inside the base 1.

[0105] It should be noted that the first temperature sensor 9 is used to collect the internal temperature of the measuring pool 3, which can be recorded as the first temperature value; the second temperature sensor 10 is used to collect the internal temperature of the base 1, which can be recorded as the second temperature value.

[0106] Understandably, according to the existing judgment rules, the temperature inside the measuring cell 3 is determined by the first temperature value and the second temperature value together, which helps to determine the liquid temperature of the liquid to be measured.

[0107] Specifically, the first temperature sensor 9 and the second temperature sensor 10 are connected to the temperature acquisition module 8.

[0108] It should be noted that after calibration, the temperature acquisition module 8 can achieve an accuracy of 0.01℃ within the temperature range of 0℃ to 100℃.

[0109] Combination Figure 4 As shown, the temperature acquisition module 8 is connected to the controller 6.

[0110] In practical applications, the first temperature sensor 9 and the second temperature sensor 10 are specifically platinum resistance temperature sensors, or thermistors (such as high-precision PT100 temperature sensors or NTC temperature sensors).

[0111] The following is combined with Figure 4 The data flow between various electronic devices and components in the embodiments of this utility model will be explained.

[0112] When the measurement system is powered on, the controller 6 actively generates a high-frequency harmonic signal based on the reference signal initially acquired by the AD converter and transmits it to the digital-to-analog signal generation module 41, driving the digital-to-analog signal generation module 41 to generate the corresponding waveform. Subsequently, the drive amplification module 42 reduces the signal impedance and increases the drive voltage, and the drive amplification module 42 transmits the processed signal to the drive oscillation transducer 43 for vibration.

[0113] Specifically, the drive oscillation transducer 43 converts the electrical signal into a mechanical vibration signal to vibrate, thereby causing the reference tube and the oscillating U-shaped tube in the measuring cell 3 to vibrate.

[0114] Furthermore, the first vibration sensor 51 collects the vibration frequency of the reference tube in the measuring cell 3, converts the vibration signal into an electrical signal, and transmits it to the signal acquisition module 53.

[0115] The second vibration sensor 52 collects the vibration frequency of the oscillating U-shaped tube in the measuring cell 3, converts the vibration signal into an electrical signal, and transmits it to the signal acquisition module 53.

[0116] It should be noted that after the signal acquisition module 53 filters and shapes the electrical signal, it outputs the processed electrical signal to the analog-to-digital signal acquisition module 54, which converts the electrical signal into discrete voltage value signals for further processing by the controller 6.

[0117] In addition, the first temperature sensor 9 collects the internal temperature of the measuring cell 3 and transmits the internal temperature to the temperature acquisition module 8.

[0118] The second temperature sensor 10 collects the internal temperature of the base below the measuring pool 3 and transmits the internal temperature to the temperature acquisition module 8.

[0119] It should be noted that the temperature acquisition module 8 transmits the received internal temperature to the controller 6.

[0120] In some specific embodiments, the controller 6 determines the liquid density, viscosity and measurement cell state of the liquid to be measured based on discrete voltage signals and internal temperature, and then transmits the data to the host computer or outputs it to the interactive interface.

[0121] This can be understood as follows: by adjusting the phase and amplitude of the measurement system, the measuring cell will vibrate at different frequencies. Controller 6 analyzes these vibration frequencies based on existing analytical logic to determine the viscosity of the liquid being measured (i.e., the flow resistance of the liquid). Simultaneously, controller 6 monitors the operating status of the measuring cell based on data fluctuations to determine whether it is in normal working condition.

[0122] In short, the measurement system can analyze the viscosity of liquids and monitor the operation of the measurement cell in real time by making the measurement cell vibrate at different frequencies.

[0123] It should be noted that all the above data processing and data transmission processes are based on existing technologies and mature technical solutions for various devices and components, ensuring the stability and efficiency of the system.

[0124] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, for system or system embodiments, since they are basically similar to method embodiments, the description is relatively simple, and relevant parts can be referred to the descriptions in the method embodiments. The systems and system embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without creative effort.

[0125] Those skilled in the art will further recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this invention.

[0126] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A liquid density measurement system, characterized by, The system includes: a base, a fixing component, a measuring cell, driving electronic components, data acquisition electronic components, and a controller; The measuring cell is fixed to the base, the fixing component is disposed above the base, and the measuring cell is filled with the liquid to be tested; The driving electronics and the controller are located below the measuring cell and mounted on the base, with the driving electronics in contact with the measuring cell; The driving electronics are connected to the controller. The driving electronics receive the driving signal sent by the controller to vibrate and drive the measuring cell to vibrate. The acquisition electronic device is located around the periphery of the measuring pool and connected to the controller. The acquisition electronic device sends the measured vibration frequency of the measuring pool to the controller, which uses the pre-input correspondence between the vibration frequency and the liquid density to determine the liquid density of the liquid to be tested based on the vibration frequency.

2. The system according to claim 1, characterized in that, The measuring cell includes an oscillating U-shaped tube, a reference tube, and a glass protective cover; The glass protective cover is horizontally mounted on the base; The glass protective cover has a hollow structure, and the horizontally fixed oscillating U-shaped tube and the reference tube are sealed inside the glass protective cover; The inlet and outlet of the oscillating U-tube are located on one side of the glass protective cover, and the inlet and outlet of the oscillating U-tube are used to inject and discharge the liquid to be tested. The reference tube compensates for the elastic modulus of the oscillating U-shaped tube into which the liquid to be tested is injected.

3. The system of claim 1, wherein, The fixing component includes an upper seat and a fixing plate for fixing the measuring cell; The upper seat is disposed above the base, and the upper seat is fixed to both sides of the measuring pool; The fixing plate is disposed on the outer surface of the measuring cell.

4. The system according to claim 3, characterized in that, The electronic data acquisition device includes: a first vibration sensor, a second vibration sensor, a signal acquisition module, and an analog-to-digital signal acquisition module; The first vibration sensor and the second vibration sensor are respectively disposed below the upper seat and placed on the base; The first vibration sensor and the second vibration sensor are respectively in contact with the measuring cell; The first vibration sensor and the second vibration sensor are respectively connected to the signal acquisition module; The signal acquisition module is connected to the analog-to-digital signal acquisition module; The analog-to-digital signal acquisition module is connected to the controller.

5. The system according to claim 1, characterized in that, The driving electronic device includes: a digital-to-analog signal generation module, a driving amplification module, and a driving oscillation transducer; The controller is connected to the digital-to-analog signal generation module; The digital-to-analog signal generation module is connected to one end of the drive amplification module; The other end of the drive amplification module is connected to the drive oscillation transducer; The driving oscillation transducer is in contact with the measuring cell.

6. The system according to claim 1, characterized in that, Also includes: Temperature control module, temperature acquisition module, first temperature sensor and second temperature sensor; The temperature control module is located below the base; The first temperature sensor is disposed inside the measuring cell; The second temperature sensor is disposed inside the base; The first temperature sensor and the second temperature sensor are connected to the temperature acquisition module; The temperature acquisition module is connected to the controller.

7. The system according to claim 6, characterized in that, The first temperature sensor and the second temperature sensor are specifically platinum resistance temperature sensors, or thermistors.

8. The system according to claim 4, characterized in that, The first vibration sensor and the second vibration sensor are specifically electromagnetic capture transducers or infrared capture transducers.

9. The system of claim 5, wherein, The driving oscillation transducer is specifically an electromagnetic drive sensor, a piezoelectric ceramic drive sensor, or other vibration signal drive sensor.

10. The system of claim 5, wherein, The driving amplification module is specifically an operational amplifier.

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