Device and method for measuring density and viscosity of emulsified oil by tuning fork pulse method

Abstract

The invention relates to the technical field of devices for measuring the density and the viscosity of emulsified oil, in particular to a device for measuring the density and the viscosity of the emulsified oil through a tuning fork pulse method and a measuring method.The device comprises a bottom plate, an aging kettle, a lifting device, a tuning fork, a tuning fork sensor and a control assembly, and the lifting device capable of moving up and down is arranged on the upper side of the bottom plate; a connecting frame is installed outside the lifting device, a tuning fork sensor is installed at the lower end of the connecting frame, a tuning fork is installed on the tuning fork sensor, an aging kettle used for containing emulsified oil and located on the bottom plate is arranged below the tuning fork, and the tuning fork sensor is connected with the control assembly. The device is reasonable and compact in structure and convenient to use, the lifting device is matched with the tuning fork, the position of the tuning fork in emulsified oil can be adjusted during measurement, the density and viscosity of the emulsified oil with different depths can be conveniently measured, automatic measurement is achieved through linkage with the control assembly, and the device is safer and more convenient to use.

Description

Technical Field

[0001] This invention relates to the field of devices for measuring the density and viscosity of emulsified oil, specifically a device and method for measuring the density and viscosity of emulsified oil using the tuning fork pulse method. Background Technology

[0002] After crude oil emulsifies, the degree of emulsification varies at different depths, resulting in differences in density and viscosity. Accurate and continuous measurement of the density and viscosity distribution of emulsified oil can evaluate its uniformity and stability. Because crude oil emulsions have a wide viscosity range and are non-Newtonian fluids, different shear rates result in different observable viscosities. Furthermore, the density and viscosity changes at different depths are relatively weak, making it difficult for instruments to accurately measure these variations. The most common measurement method is to use a syringe to extract emulsified oil from different depths and measure the density change. For viscosity changes, the upper layer is dried out, and measurements are taken gradually downwards multiple times. A tuning fork, when impacted, vibrates at a frequency f, then gradually decays. Its vibration frequency is affected by the fluid density, and its decay rate is affected by the fluid viscosity. Therefore, by measuring the vibration pattern of the impacted tuning fork, the density and viscosity of the fluid in which it is located can be determined. The patent CN206311463U discloses a multi-functional tuning fork measuring instrument, comprising a housing, a flange, a connecting column, and a mounting column. A tuning fork, consisting of two symmetrical fork bodies, is connected to the lower end of the mounting column. The instrument includes a detection system comprising a frequency detection device for detecting the frequency of the liquid and outputting a frequency voltage signal; a first signal amplification device for amplifying the frequency voltage signal; an amplitude detection device for detecting the amplitude of the liquid and outputting an amplitude voltage signal; a second signal amplification device for amplifying the amplitude voltage signal; a processing device for receiving and analyzing the amplified frequency voltage signal and outputting a first digital signal, and receiving and analyzing the amplified amplitude voltage signal and outputting a second digital signal; and a display device for displaying the liquid density after receiving the first digital signal and the liquid viscosity after receiving the second digital signal. However, this patent can only measure data from one location at a time, requiring separate extraction and measurement of data from different locations, resulting in a cumbersome and inefficient measurement process. Summary of the Invention

[0003] This invention provides an apparatus and method for measuring the density and viscosity of emulsified oil using the tuning fork pulse method. It overcomes the shortcomings of the prior art and effectively solves the problem that existing emulsified oil density and viscosity measurements are inaccurate because the density and viscosity changes at different depths are weak and the existing tuning fork can only measure one position.

[0004] One of the technical solutions of the present invention is achieved through the following measures: a device for measuring the density and viscosity of emulsified oil using the tuning fork pulse method, comprising a base plate, an aging kettle, a lifting device, a tuning fork, a tuning fork sensor, and a control component. The upper side of the base plate is provided with a lifting device that can move up and down. A connecting frame is installed outside the lifting device. A tuning fork sensor is installed at the lower end of the connecting frame. A tuning fork is installed on the tuning fork sensor. An aging kettle containing emulsified oil is located on the base plate below the tuning fork. The tuning fork sensor is connected to the control component. The control component can control the vibration frequency of the tuning fork and collect vibration signals, which are transmitted to the controller to obtain density and viscosity parameters.

[0005] The following are further optimizations and / or improvements to the above-mentioned technical solution: Preferably, the control components include a signal generator, a vibration signal acquisition circuit, and a lifting device drive circuit. The signal generator is used to generate a signal to drive the tuning fork, the vibration signal acquisition circuit is used to collect and record the vibration of the tuning fork and transmit it to the controller, and the lifting device drive circuit drives the lifting device to move up and down to adjust the position of the tuning fork.

[0006] Preferably, the tuning fork is placed horizontally.

[0007] Preferably, the control component further includes a high-voltage signal amplifier for amplifying the signal generated by the signal generator.

[0008] Preferably, it also includes a temperature sensor. A temperature sensor is provided on the rear side of the tuning fork sensor. The control component also includes a temperature sensor AD conversion circuit to transmit the temperature data collected by the temperature sensor to the controller.

[0009] Preferably, the lifting device includes a servo motor, a lead screw, and a nut. The servo motor is connected to the lead screw via a drive, the lead screw is threadedly connected to the nut, and the outer side of the nut is mounted together with the connecting frame.

[0010] Preferably, a data interface is provided on the underside of the base plate, and the control component is connected to the tuning fork sensor and the temperature sensor through the data interface.

[0011] The second technical solution of the present invention is achieved through the following measures: a measurement method, performed according to the following steps: Step 1: The lifting device drive circuit controls the lifting device to move the tuning fork sensor and tuning fork to the preset position; Step 2: The signal generator emits a sinusoidal signal for two cycles, with the period of the signal being the resonant frequency of the tuning fork in the water; Step 3: The sinusoidal signal emitted by the signal generator is amplified by the high-voltage amplifier and then drives the tuning fork sensor to vibrate. The tuning fork sensor has piezoelectric ceramic driving and acquisition functions. After receiving two cycles of driving, the tuning fork vibrates freely. The frequency of the free vibration is the local frequency of the tuning fork at this time. The vibration amplitude decreases with time. The tuning fork performs damped vibration. The attenuation coefficient is determined by the viscosity. Step 4: The frequency signal of the free vibration of the tuning fork is fed back to the vibration signal acquisition circuit and transmitted to the controller; Step 5: The controller processes the received data and calculates the frequency and amplitude decay rate of the tuning fork's free vibration. Step 6: Correct the parameters based on the temperature parameters returned by the temperature acquisition device to obtain the viscosity and density parameters at this location; Step 7: Measure for 10ms to 100ms each time, and average the results after multiple measurements. Step 8: After the measurement results stabilize, the lifting device drive circuit controls the lifting device to move the tuning fork to the next position for measurement. Repeat steps one to seven to obtain the vertical distribution map of the density and viscosity of emulsified oil at different depths.

[0012] The following are further optimizations and / or improvements to the above-mentioned technical solution: Preferably, in step three, the amplitude of the tuning fork is controlled by controlling the amplification factor of the high-voltage signal amplifier to obtain the viscosity of the emulsified oil at different shear rates.

[0013] The present invention has a reasonable and compact structure and is easy to use. By setting up a lifting device in conjunction with a tuning fork, the position of the tuning fork in the emulsified oil can be adjusted during measurement, thereby facilitating the measurement of the density and viscosity of emulsified oil at different depths. Automatic measurement is achieved through linkage with the control components, making it safer and more convenient. Attached Figure Description

[0014] Appendix Figure 1 This is a schematic diagram of the main structure of an embodiment of the present invention.

[0015] The codes in the attached diagram are as follows: 1 is the base plate, 2 is the aging kettle, 3 is the lifting device, 4 is the tuning fork, 5 is the tuning fork sensor, 6 is the signal generator, 7 is the vibration signal acquisition circuit, 8 is the lifting device drive circuit, 9 is the high voltage signal amplifier, 10 is the controller, 11 is the temperature sensor AD conversion circuit, 12 is the data interface, and 13 is the connecting frame. Detailed Implementation

[0016] The present invention is not limited to the following embodiments, and the specific implementation can be determined according to the technical solution of the present invention and the actual situation.

[0017] In this invention, for ease of description, the description of the relative positions of the components is based on the appendix to the specification. Figure 1 The layout is described using a diagrammatic method, such as front, back, top, bottom, left, right, etc. The positional relationships are determined based on the layout direction of the attached diagram in the instruction manual.

[0018] The present invention will be further described below with reference to embodiments and accompanying drawings: Example 1: As shown in the attached document Figure 1 As shown, the device for measuring the density and viscosity of emulsified oil using the tuning fork pulse method includes a base plate 1, an aging vessel 2, a lifting device 3, a tuning fork 4, a tuning fork sensor 5, and a control component. The upper side of the base plate 1 is equipped with a lifting device 3 that can move up and down. A connecting frame 13 is installed on the outside of the lifting device 3. The tuning fork sensor 5 is installed at the lower end of the connecting frame 13. The tuning fork 4 is installed on the tuning fork sensor 5. The aging vessel 2 containing the emulsified oil is located on the base plate 1 below the tuning fork 4. The tuning fork sensor 5 is connected to the control component. The control component can control the vibration frequency of the tuning fork 4 and collect vibration signals to transmit to the controller 10 to obtain density and viscosity parameters.

[0019] According to requirements, the tuning fork sensor 5 is equipped with piezoelectric ceramic drive and data acquisition functions. In use, the control lifting device 3 moves downwards, immersing the tuning fork 4 into the emulsified oil contained in the aging kettle 2. The control component drives the tuning fork sensor 5 to generate a specific frequency in the tuning fork 4. After being impacted, the tuning fork 4 vibrates at frequency f, then gradually decays. Its vibration frequency is affected by the fluid density, and the damping of the tuning fork 4 crystal oscillator is affected by the liquid viscosity. The higher the viscosity, the greater the vibration damping, and the faster the amplitude decays after the tuning fork 4 stops driving. By calibrating the decay rate of the tuning fork 4 vibration, the relationship between viscosity and the tuning fork 4 signal is obtained, thus acquiring the emulsified oil density and viscosity parameters. The lifting device 3 continues to move and adjust the position of the tuning fork 4 to measure emulsified oil parameters at different positions. The control component achieves automatic measurement and calculation, making adjustment quick and convenient, with high operating efficiency and more accurate measurement results.

[0020] The above-mentioned device for measuring the density and viscosity of emulsified oil using the tuning fork pulse method can be further optimized and / or improved according to actual needs: Example 2: As shown in the attached document Figure 1 As shown, the control components include a signal generator 6, a vibration signal acquisition circuit 7, and a lifting device drive circuit 8. The signal generator 6 generates a signal to drive the tuning fork 4. The vibration signal acquisition circuit 7 collects, records, and transmits the vibration data of the tuning fork 4 to the controller 10. The lifting device drive circuit 8 drives the lifting device 3 to move up and down to adjust the position of the tuning fork 4. The vibration signal acquisition circuit 7 is mainly a high-speed AD module. Automatic measurement and calculation are achieved through the control components, and the controller 10 can be a computer.

[0021] Example 3: As shown in the attached document Figure 1As shown, tuning fork 4 is placed horizontally. Placing tuning fork 4 horizontally allows for higher longitudinal resolution of density and viscosity while maintaining its sensitivity.

[0022] Example 4: As shown in the appendix Figure 1 As shown, the control assembly also includes a high-voltage signal amplifier 9, used to amplify the signal generated by the signal generator 6. By controlling the amplification factor of the high-voltage signal amplifier 9, the amplitude of the tuning fork 4 can be controlled. Since the emulsified oil is a non-Newtonian fluid, different shear rates result in different observable viscosities. By controlling different amplitudes, the rheological parameters of the emulsified oil (viscosity at different shear rates) can be obtained.

[0023] Example 5: As shown in the attached document Figure 1 As shown, it also includes a temperature sensor. A temperature sensor is located on the rear side of the tuning fork sensor 5. The control component also includes a temperature sensor AD conversion circuit 11, which transmits the temperature data collected by the temperature sensor to the controller 10. This is used to correct measurement errors caused by temperature.

[0024] Example 6: As attached Figure 1 As shown, the lifting device 3 includes a servo motor, a lead screw, and a nut. The servo motor is connected to the lead screw via a drive, the lead screw is threadedly connected to the nut, and the outer side of the nut is mounted together with the connecting frame 13.

[0025] Example 7: As attached Figure 1 As shown, a data interface 12 is provided on the lower side of the base plate 1, and the control component is connected to the tuning fork sensor 5 and the temperature sensor through the data interface 12.

[0026] Example 8: As attached Figure 1 As shown, a measurement method is performed according to the following steps: Step 1: The lifting device drive circuit 8 controls the lifting device 3 to move the tuning fork sensor 5 and tuning fork 4 to the preset position; Step 2: Signal generator 6 emits a sinusoidal signal for two cycles, the period of which is the resonant frequency of tuning fork 4 in water; Step 3: The sinusoidal signal emitted by the signal generator 6 is amplified by the high-voltage signal amplifier 9 and then drives the tuning fork 4 to vibrate through the tuning fork sensor 5. The tuning fork sensor 5 has piezoelectric ceramic driving and acquisition functions. After receiving two cycles of driving, the tuning fork 4 vibrates freely. The frequency of free vibration is the local oscillator frequency of the tuning fork 4 at this time. The vibration amplitude decreases with time. The tuning fork 4 performs damped vibration, and the attenuation coefficient is determined by the viscosity. Step 4: The frequency signal of the free vibration of the tuning fork 4 is fed back to the vibration signal acquisition circuit 7 and transmitted to the controller 10; Step 5: The controller 10 processes the received data and calculates the frequency and amplitude decay rate of the free vibration of the tuning fork 4; Step 6: Correct the parameters based on the temperature parameters returned by the temperature acquisition device to obtain the viscosity and density parameters at this location; Step 7: Measure for 10ms to 100ms each time, and average the results after multiple measurements. Step 8: After the measurement results stabilize, the lifting device drive circuit 8 controls the lifting device 3 to move the tuning fork 4 to the next position for measurement. Repeat steps one to seven to obtain the vertical distribution map of the density and viscosity of emulsified oil at different depths.

[0027] As attached Figure 1 As shown, in step three, the amplitude of the tuning fork 4 is controlled by adjusting the amplification factor of the high-voltage signal amplifier 9, thus obtaining the viscosity of the emulsified oil at different shear rates. Controlling the amplification factor of the high-voltage signal amplifier 9 makes the amplitude of the tuning fork 4 controllable. Since the emulsified oil is a non-Newtonian fluid, different shear rates result in different observable viscosities. By controlling different amplitudes, the rheological parameters of the emulsified oil (viscosity at different shear rates) can finally be obtained.

[0028] This invention employs a pulse voltage-driven tuning fork 4 free vibration measurement method, which can accurately and automatically measure the density and viscosity distribution of high-viscosity emulsified oil at different depths. At the same time, different amplitudes can be obtained by using different driving voltages, thereby measuring the rheological parameters of the emulsified oil. This achieves automatic, efficient and accurate data measurement, providing a basis for evaluating the uniformity and stability of emulsified oil, and further guiding oilfields in evaluating and analyzing crude oil emulsification phenomena.

[0029] The above technical features constitute the embodiments of the present invention, which have strong adaptability and implementation effect. Unnecessary technical features can be added or removed according to actual needs to meet the needs of different situations.

Claims

1. A device for measuring the density and viscosity of emulsified oil using the tuning fork pulse method, characterized in that... The system includes a base plate, an aging tank, a lifting device, a tuning fork, a tuning fork sensor, and a control component. The upper side of the base plate is equipped with a lifting device that can move up and down. A connecting frame is installed on the outside of the lifting device. A tuning fork sensor is installed at the lower end of the connecting frame. A tuning fork is installed on the tuning fork sensor. Below the tuning fork is an aging tank containing emulsified oil, located on the base plate. The tuning fork sensor is connected to the control component. The control component can control the vibration frequency of the tuning fork and collect vibration signals, which are transmitted to the controller to obtain density and viscosity parameters.

2. The apparatus for measuring the density and viscosity of emulsified oil using the tuning fork pulse method according to claim 1, characterized in that... The control components include a signal generator, a vibration signal acquisition circuit, and a lifting device drive circuit. The signal generator is used to generate a signal to drive the tuning fork. The vibration signal acquisition circuit is used to collect and record the vibration of the tuning fork and transmit it to the controller. The lifting device drive circuit drives the lifting device to move up and down to adjust the position of the tuning fork, or / and the tuning fork is placed horizontally.

3. The apparatus for measuring the density and viscosity of emulsified oil using the tuning fork pulse method according to claim 2, characterized in that... The control components also include a high-voltage signal amplifier for amplifying the signal generated by the signal generator.

4. The apparatus for measuring the density and viscosity of emulsified oil using the tuning fork pulse method according to claim 2 or 3, characterized in that... It also includes a temperature sensor. A temperature sensor is located on the back of the tuning fork sensor. The control component also includes a temperature sensor AD conversion circuit to transmit the temperature data collected by the temperature sensor to the controller.

5. The apparatus for measuring the density and viscosity of emulsified oil using the tuning fork pulse method according to claim 1, 2, or 3, characterized in that... The lifting device includes a servo motor, a lead screw, and a nut. The servo motor is connected to the lead screw via a drive, the lead screw is threadedly connected to the nut, and the outer side of the nut is mounted together with the connecting frame.

6. The apparatus for measuring the density and viscosity of emulsified oil using the tuning fork pulse method according to claim 4, characterized in that... The lifting device includes a servo motor, a lead screw, and a nut. The servo motor is connected to the lead screw via a drive, the lead screw is threadedly connected to the nut, and the outer side of the nut is mounted together with the connecting frame.

7. The apparatus for measuring the density and viscosity of emulsified oil using the tuning fork pulse method according to claim 4, characterized in that... A data interface is located on the underside of the base plate, through which the control components are connected to the tuning fork sensor and temperature sensor.

8. The apparatus for measuring the density and viscosity of emulsified oil using the tuning fork pulse method according to claim 5, characterized in that... A data interface is located on the underside of the base plate, through which the control components are connected to the tuning fork sensor and temperature sensor.

9. A method for measuring the density and viscosity of emulsified oil using the tuning fork pulse method as described in any one of claims 4 to 9, characterized in that... Follow these steps: Step 1: The lifting device drive circuit controls the lifting device to move the tuning fork sensor and tuning fork to the preset position; Step 2: The signal generator emits a sinusoidal signal for two cycles, with the period of the signal being the resonant frequency of the tuning fork in the water; Step 3: The sinusoidal signal emitted by the signal generator is amplified by the high-voltage signal amplifier and then drives the tuning fork sensor to vibrate. The tuning fork sensor has piezoelectric ceramic driving and acquisition functions. After receiving two cycles of driving, the tuning fork vibrates freely. The frequency of the free vibration is the local frequency of the tuning fork at this time. The vibration amplitude decreases with time. The tuning fork performs damped vibration. The attenuation coefficient is determined by the viscosity. Step 4: The frequency signal of the free vibration of the tuning fork is fed back to the vibration signal acquisition circuit and transmitted to the controller; Step 5: The controller processes the received data and calculates the frequency and amplitude decay rate of the tuning fork's free vibration. Step 6: Correct the parameters based on the temperature parameters returned by the temperature acquisition device to obtain the viscosity and density parameters at this location; Step 7: Measure for 10ms to 100ms each time, and average the results after multiple measurements. Step 8: After the measurement results stabilize, the lifting device drive circuit controls the lifting device to move the tuning fork to the next position for measurement. Repeat steps one to seven to obtain the vertical distribution map of the density and viscosity of emulsified oil at different depths.

10. The measurement method according to claim 9, characterized in that... In step three, the viscosity of the emulsified oil at different shear rates is obtained by controlling the amplification factor of the high-voltage amplifier and the amplitude of the tuning fork.

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