A viscosity sensor device and a viscosity measurement method

Abstract

The embodiment of the present application provides a viscosity sensor device and a viscosity measurement method, which relate to the technical field of oil monitoring. The viscosity sensor device includes a vibration actuator and a vibration detection mechanism; the vibration actuator includes a vibration conversion element, a circular flat diaphragm and a vibrator, the vibration conversion element is arranged on the first surface of the circular flat diaphragm, the vibrator is arranged on the second surface of the circular flat diaphragm, and the vibrator vibrates along the normal or tangent direction of the circular flat diaphragm; the vibration detection mechanism includes a vibration detection circuit, and the vibration detection circuit is connected to the vibration conversion element. The viscosity sensor device can achieve the technical effect of improving the sensor range.

Description

Technical Field

[0001] The present application relates to the technical field of oil monitoring, and in particular to a viscosity sensor device and a viscosity measurement method. Background Art

[0002] At present, the viscosity sensor is generally composed of a baffle, a transmission rod, an elastic beam, a positioning tube, a protective cover and a force-sensitive element. The force-sensitive element outputs a signal to detect the viscosity change of the fluid medium. It is suitable for online detection of the viscosity change of the medium in a stirred reactor. It can be used not only for Newtonian fluid media, but also for non-Newtonian fluid media such as polymers. In the prior art, the viscosity sensor has a narrow range and poor practicality. Summary of the invention

[0003] The purpose of the embodiments of the present application is to provide a viscosity sensor device and a viscosity measurement method, which can achieve the technical effect of increasing the sensor range.

[0004] In a first aspect, an embodiment of the present application provides a viscosity sensor device, including a vibration actuator and a vibration detection mechanism;

[0005] The vibration actuator comprises a vibration conversion element, a circular flat diaphragm and a vibrator, wherein the vibration conversion element is arranged on the first surface of the circular flat diaphragm, the vibrator is arranged on the second surface of the circular flat diaphragm, and the vibrator vibrates along the normal or tangent direction of the circular flat diaphragm;

[0006] The vibration detection mechanism includes a vibration detection circuit, and the vibration detection circuit is connected to the vibration conversion element.

[0007] In the above implementation process, the viscosity sensor device includes a resonance unit working in a liquid environment, and the resonance unit includes a vibration actuator and a vibration detection mechanism. The oil can be measured based on a dual vibration mode, so that the vibrator vibrates along the normal or tangent direction of the circular flat diaphragm. When the vibrator vibrates along the normal of the circular flat diaphragm, it shears the surrounding liquid, and when the vibrator vibrates along the tangent of the circular flat diaphragm, it moves a certain volume of liquid; thus, the viscosity sensor device uses different resonance modes of the vibrator to measure the viscosity of the oil, and adopts a hysteresis control method to switch between the two vibration modes, thereby effectively achieving a wide range of measurements and realizing the technical effect of improving the sensor range.

[0008] Furthermore, the device also includes a first shell, and the vibration conversion element is installed inside the first shell.

[0009] In the above implementation process, the vibration conversion element is installed inside the first shell, and the first shell and the circular flat diaphragm together isolate the vibration conversion element from the external liquid environment to ensure that the vibration conversion element is not corroded by the liquid, thereby ensuring the stability and reliability of the vibration conversion element.

[0010] Furthermore, the device also includes a connector, and the connector is connected to the vibration detection circuit and the vibration conversion element respectively.

[0011] In the above implementation process, the vibration conversion element transmits signals to the outside world through the connector.

[0012] Furthermore, the device also includes a second shell, the second shell is installed on an outer surface of one side of the first shell, and the connector is installed in the second shell.

[0013] In the above implementation process, the second shell is connected to the first shell in an airtight manner, thereby ensuring that the connector and the vibration conversion element are isolated from the external liquid environment and that the connector and the vibration conversion element are not corroded by the liquid.

[0014] Furthermore, the device also includes a protective cover, which is arranged on the outer surface of the other side of the first shell, and the vibrator is installed in the protective cover.

[0015] In the above implementation process, the protective cover is used to protect the vibrator.

[0016] Furthermore, the vibrator is perpendicular to the surface of the circular flat diaphragm, and when the vibration conversion element works in the first resonance mode, it drives the circular flat diaphragm to vibrate along the tangent direction of the circular flat diaphragm.

[0017] In the above implementation process, in the first vibration mode, the viscosity sensor vibrates along the tangent direction of the circular flat diaphragm, and at this time the viscosity sensor moves a certain volume of liquid.

[0018] Furthermore, when the vibration conversion element operates in the second resonance mode, the circular flat diaphragm is driven to vibrate along the normal direction of the circular flat diaphragm.

[0019] In the above implementation process, in the second vibration mode, the viscosity sensor vibrates along the normal direction of the circular flat diaphragm, and at this time the viscosity sensor shears a certain volume of liquid.

[0020] Furthermore, the vibration detection circuit includes a first signal transmission line and a second signal transmission line, and the first signal transmission line and the second signal transmission line are respectively connected to the vibration conversion element.

[0021] In the above implementation process, the first vibration mode and the second vibration mode work in time-sharing mode. When working in one of the vibration modes, the first signal transmission line and the second signal transmission line transmit signals together. When the vibration conversion element is in different vibration modes, the signal is transmitted through the two signal transmission lines. The time-sharing operation of the two vibration modes can avoid mutual interference of signals in different vibration modes, thereby improving the measurement accuracy.

[0022] In a second aspect, an embodiment of the present application provides a viscosity measurement method, which is applied to the viscosity sensor device according to any one of the first aspects, and the method includes:

[0023] driving the circular flat diaphragm to vibrate along a tangential direction of the circular flat diaphragm to obtain a first viscosity measurement value;

[0024] Determining whether the first viscosity measurement value is greater than the first viscosity preset value;

[0025] If so, mark the first viscosity measurement value as true, end the measurement or proceed to the next measurement;

[0026] If not, the circular flat diaphragm is driven to vibrate along the normal direction of the circular flat diaphragm to obtain a second viscosity measurement value.

[0027] In the above implementation process, the first resonance mode is used, that is, the circular flat diaphragm is driven to vibrate along the tangent direction of the circular flat diaphragm, to measure high viscosity oil, thereby making the viscosity measurement result more accurate.

[0028] In a third aspect, an embodiment of the present application provides a viscosity measurement method, which is applied to the viscosity sensor device according to any one of the first aspects, and the method includes:

[0029] driving the circular flat diaphragm to vibrate along a normal direction of the circular flat diaphragm to obtain a second viscosity measurement value;

[0030] Determining whether the second viscosity measurement value is less than the second viscosity preset value;

[0031] If so, mark the second viscosity measurement value as true, end the measurement or proceed to the next measurement;

[0032] If not, the circular flat diaphragm is driven to vibrate along the tangential direction of the circular flat diaphragm to obtain a third viscosity measurement value.

[0033] In the above implementation process, the second resonance mode is used, that is, the circular flat diaphragm is driven to vibrate along the normal direction of the circular flat diaphragm, to measure low-viscosity oil, thereby making the viscosity measurement result more accurate.

[0034] Other features and advantages of the present disclosure will be set forth in the following description, or some features and advantages may be inferred or unambiguously determined from the description, or may be learned by implementing the above-mentioned technology of the present disclosure.

[0035] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0037] Figure 1 A schematic diagram of the structure of a viscosity sensor device provided in an embodiment of the present application;

[0038] Figure 2 A schematic diagram of the structure of another viscosity sensor device provided in an embodiment of the present application;

[0039] Figure 3 A vibration schematic diagram of a viscosity sensor in a first vibration mode provided in an embodiment of the present application;

[0040] Figure 4 A vibration schematic diagram of a viscosity sensor in a second vibration mode provided in an embodiment of the present application;

[0041] Figure 5 A schematic diagram of a viscosity measurement method provided in an embodiment of the present application;

[0042] Figure 6 A schematic flow chart of another viscosity measurement method provided in an embodiment of the present application. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0044] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0045] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0046] In addition, the terms "installed", "set", "provided with", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or a point connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0047] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0048] The embodiment of the present application provides a viscosity sensor device and a viscosity measurement method, which can be applied to the viscosity test of oil to achieve a technical effect of a wide range; the viscosity sensor device includes a resonance unit working in a liquid environment, the resonance unit includes a vibration actuator and a vibration detection mechanism, and can measure the oil based on a dual vibration mode, so that the vibrator vibrates along the normal or tangent direction of the circular flat diaphragm, and the vibrator shears the surrounding liquid when it vibrates along the normal of the circular flat diaphragm, and moves a certain volume of liquid when it vibrates along the tangent of the circular flat diaphragm; thus, the viscosity sensor device measures the viscosity of the oil using different resonance modes of the vibrator, and adopts a hysteresis control method to switch between the two vibration modes, thereby effectively achieving a wide range of measurement and realizing the technical effect of improving the sensor range.

[0049] See also Figure 1 , Figure 1This is a schematic structural diagram of a viscosity sensor device provided in an embodiment of the present application. The viscosity sensor device includes a vibration actuator 100 and a vibration detection mechanism.

[0050] Exemplarily, the vibration actuator 100 includes a vibration conversion element 110, a circular flat diaphragm 120 and a vibrator 130, the vibration conversion element 110 is arranged on the first surface of the circular flat diaphragm 120, the vibrator 130 is arranged on the second surface of the circular flat diaphragm 120, and the vibrator 130 vibrates along the normal or tangent direction of the circular flat diaphragm 120.

[0051] Exemplarily, the vibration detection mechanism includes a vibration detection circuit, which is connected to the vibration conversion element 110 .

[0052] Exemplarily, the viscosity sensor device includes a resonance unit, which includes a vibration actuator 100 and a vibration detection mechanism; wherein the vibration actuator includes a vibration conversion element 110 for applying vibration, a circular flat diaphragm 120 for isolating the vibration conversion element 110 from the liquid environment, and a vibrator 130 connected to the circular flat diaphragm 120; the vibration conversion element 110 applies vibration to the vibrator 130 through the circular flat diaphragm 120, so that the vibrator 130 senses the changes in the liquid environment by vibration, and the vibration detection mechanism detects the measurement signal of the vibrator. The vibration detection mechanism includes a vibration detection circuit, and the vibration detection circuit processes the measurement signal to obtain the viscosity information of the liquid.

[0053] Exemplarily, the vibration conversion element 110 can receive an excitation signal to make itself vibrate; when no excitation signal is input to the vibration conversion element 110, the vibration conversion element 110 can convert the vibration signal of the vibrator 130 into an electrical signal, and transmit it to the vibration detection circuit; thereby, the vibration detection circuit can process the measurement signal and obtain the viscosity information of the liquid.

[0054] In some embodiments, the viscosity sensor device includes a resonance unit working in a liquid environment, and the resonance unit includes a vibration actuator 100 and a vibration detection mechanism. The oil can be measured based on a dual vibration mode, so that the vibrator 130 vibrates along the normal or tangential direction of the circular flat diaphragm 120. When the vibrator 130 vibrates along the normal of the circular flat diaphragm 120, it shears the surrounding liquid. When the vibrator 130 vibrates along the tangent of the circular flat diaphragm 120, it moves a certain volume of liquid. Thus, the viscosity sensor device uses different resonance modes of the vibrator 130 to measure the viscosity of the oil, and adopts a hysteresis control method to switch between the two vibration modes, thereby effectively achieving a wide range of measurements and realizing the technical effect of improving the sensor range.

[0055] In some embodiments, the vibration detection circuit includes a first signal transmission line 210 and a second signal transmission line 220 , and the first signal transmission line 210 and the second signal transmission line 220 are respectively connected to the vibration conversion element 110 .

[0056] Exemplarily, the first vibration mode and the second vibration mode work in time-sharing mode. When working in one of the vibration modes, the first signal transmission line 210 and the second signal transmission line 220 transmit signals together; when the vibration conversion element 110 is in different vibration modes, the signal is transmitted through the two signal transmission lines. The time-sharing operation of the two vibration modes can avoid mutual interference between signals in different vibration modes, thereby improving the measurement accuracy.

[0057] See also Figure 2 , Figure 2 A schematic diagram of the structure of another viscosity sensor device provided in an embodiment of the present application.

[0058] Exemplarily, the viscosity sensor device further includes a first housing 140 , and the vibration conversion element 110 is installed inside the first housing 140 .

[0059] Exemplarily, the vibration conversion element 110 is installed inside the first shell 140 , and the first shell 140 and the circular flat diaphragm 120 together isolate the vibration conversion element 110 from the external liquid environment to ensure that the vibration conversion element 110 is not corroded by the liquid, thereby ensuring the stability and reliability of the vibration conversion element 110 .

[0060] Exemplarily, the viscosity sensor device further includes a connector 150 , and the connector 150 is respectively connected to the vibration detection circuit and the vibration conversion element 110 .

[0061] Exemplarily, the vibration conversion element 110 transmits signals to the outside world through the connector 150 .

[0062] Exemplarily, the viscosity sensor device further includes a second housing 160 , which is mounted on an outer surface of one side of the first housing 140 , and the connector 150 is mounted in the second housing 160 .

[0063] Exemplarily, the second housing 160 is airtightly connected to the first housing 140 , thereby ensuring that the connector 150 and the vibration conversion element 110 are isolated from the external liquid environment and that the connector 150 and the vibration conversion element 110 are not corroded by the liquid.

[0064] Exemplarily, the viscosity sensor device further includes a protective cover 170 , which is disposed on the other outer surface of the first housing 140 , and the vibrator 130 is installed in the protective cover 170 .

[0065] Exemplarily, the protection cover 170 is used to protect the vibrator 130 .

[0066] See also Figure 3 , Figure 3 A schematic diagram of the vibration of the viscosity sensor under the first vibration mode provided in an embodiment of the present application.

[0067] Exemplarily, the vibrator 130 is perpendicular to the surface of the circular flat diaphragm 120 , and when the vibration conversion element 110 operates in the first resonance mode, the circular flat diaphragm 120 is driven to vibrate along the tangential direction of the circular flat diaphragm 120 .

[0068] For example, in the first vibration mode, the viscosity sensor vibrates along the tangential direction of the circular flat diaphragm 120, and the viscosity sensor moves a certain volume of liquid; Figure 3 As shown, in the first vibration mode, the viscosity sensor vibrates along the direction of the X-axis.

[0069] See also Figure 4 , Figure 4 A schematic diagram of the vibration of the viscosity sensor under the second vibration mode provided in an embodiment of the present application.

[0070] Exemplarily, when the vibration conversion element 110 operates in the second resonance mode, the circular flat diaphragm 120 is driven to vibrate along the normal direction of the circular flat diaphragm 120 .

[0071] For example, in the second vibration mode, the viscosity sensor vibrates along the normal direction of the circular flat diaphragm 120, and the viscosity sensor shears a certain volume of liquid; Figure 4 As shown, in the second vibration mode, the viscosity sensor vibrates along the direction of the Z axis.

[0072] See also Figure 5 , Figure 5 A flow chart of a viscosity measurement method provided in an embodiment of the present application, the method comprising the following steps:

[0073] S110: driving the circular flat diaphragm to vibrate along the tangent direction of the circular flat diaphragm to obtain a first viscosity measurement value.

[0074] S120: Determine whether the first viscosity measurement value is greater than the first viscosity preset value.

[0075] S130: If yes, mark the first viscosity measurement value as true, end the measurement or proceed to the next measurement.

[0076] S140: If not, drive the circular flat diaphragm to vibrate along the normal direction of the circular flat diaphragm to obtain a second viscosity measurement value.

[0077] Exemplarily, the first resonance mode is used, that is, the circular flat diaphragm is driven to vibrate along the tangent direction of the circular flat diaphragm, to measure high-viscosity oil, thereby making the viscosity measurement result more accurate.

[0078] See also Figure 6 , Figure 6 A schematic flow chart of another viscosity measurement method provided in an embodiment of the present application, the method comprising the following steps:

[0079] S210: driving the circular flat diaphragm to vibrate along the normal direction of the circular flat diaphragm to obtain a second viscosity measurement value.

[0080] S220: Determine whether the second viscosity measurement value is less than the second viscosity preset value.

[0081] S230: If yes, mark the second viscosity measurement value as true, and end the measurement or proceed to the next measurement.

[0082] S240: If not, drive the circular flat diaphragm to vibrate along the tangent direction of the circular flat diaphragm to obtain a third viscosity measurement value.

[0083] Exemplarily, the second resonance mode is used, that is, the circular flat diaphragm is driven to vibrate along the normal direction of the circular flat diaphragm, to measure low-viscosity oil, thereby making the viscosity measurement result more accurate.

[0084] In some embodiments, a viscosity sensor device provided in the embodiments of the present application is used in the following steps:

[0085] Step 1: Place the viscosity sensor device in the liquid environment to be tested. The liquid level should completely submerge the vibration actuator of the viscosity sensor.

[0086] Step 2: Measure the viscosity of the liquid to be tested. Since the viscosity changes significantly with temperature, if the temperature changes during the measurement process, the viscosity will inevitably change. When the temperature rises, the viscosity will also decrease. When the viscosity decreases from the high viscosity range to the low viscosity range, the viscosity sensor switches from the first vibration mode to the second vibration mode, thereby making the measurement more accurate; otherwise, it switches from the second vibration mode to the first vibration mode;

[0087] For example, when measuring viscosity, the first resonance mode can be first used for measurement, and the first viscosity measurement value obtained by measurement is compared with the first viscosity preset value. If the first viscosity measurement value is greater than the first viscosity preset value, the first resonance mode is still used for measurement. If the first viscosity measurement value measured is less than or equal to the first viscosity preset value, the second resonance mode is used for measurement. If, when measuring in the second resonance mode, the second viscosity measurement value obtained is less than the second viscosity preset value, the second resonance mode is still used for measurement. If the second viscosity measurement value is greater than or equal to the second viscosity preset value, the first resonance mode is used for measurement. Among them, the first viscosity preset value and the second viscosity preset value are different, which can prevent frequent switching of vibration modes when the liquid viscosity fluctuates up and down at the first viscosity preset value.

[0088] Optionally, the first viscosity preset value is 120 cSt, and the second viscosity preset value is 150 cSt;

[0089] Step 3: Measurement is finished. After selecting the vibration mode in step 2, the measurement mark can be set to "0" to end the measurement of the viscosity sensor.

[0090] Exemplarily, the viscosity sensor is divided into a first resonance mode and a second resonance mode in a liquid environment. The vibrator 130 operates in a resonant state under the action of the signal of the viscosity sensor, and is affected by the damping effect when vibrating freely in the liquid environment. The viscosity information of the measured liquid can be calculated by detecting the vibration signal and the vibration model established by the vibration detection mechanism.

[0091] Exemplarily, the excitation signal of the viscosity sensor causes the vibration to enter the first vibration mode, and the amplitude reduction rate in the current damped vibration mode is measured. The amplitude reduction rate is the ratio of two adjacent amplitudes in the same direction, denoted as α, and the natural logarithm of the amplitude reduction rate is called the logarithmic reduction coefficient, denoted by δ; in the first vibration mode, the viscosity calculation formula is as follows:

[0092]

[0093] Among them, μ is the dynamic viscosity of the liquid, k is the equivalent stiffness of the oscillator, m is the effective mass of the oscillator, l is the length of the oscillator, π is the ratio of the circumference of a circle, A is the area of ​​the oscillator, ρ l is the liquid density, is the volume mass density of the oscillator, F is the cross-sectional area of ​​the oscillator, E is the elastic modulus of the oscillator, I0 is the section inertia moment of the oscillator, δ is the logarithmic reduction coefficient, δ=lnα, α is the amplitude reduction rate. From the formula, we can see that the liquid viscosity increases with the increase of the logarithmic reduction coefficient.

[0094] When the viscosity of the liquid to be measured decreases to the low viscosity range, the excitation signal of the viscosity sensor is started, so that the vibration of the viscosity sensor enters the second vibration mode, and the amplitude reduction rate in the current damped vibration mode is measured. The amplitude reduction rate is the ratio of two adjacent amplitudes in the same direction, expressed as α, and the natural logarithm of the amplitude reduction rate is called the logarithmic reduction coefficient, expressed as δ. Among them, the radius of the circular flat diaphragm is R (m), the thickness is H (m), the elastic modulus of the material is E (Pa), and the Poisson's ratio of the material is μ; in the second vibration mode, the viscosity calculation formula is as follows:

[0095]

[0096] Among them, η is the dynamic viscosity of the liquid, k e is the equivalent stiffness of the circular flat diaphragm, m e is the equivalent mass of the circular flat diaphragm, A e is the equivalent area of ​​the circular flat diaphragm, ρ l is the liquid density, π is the circumference of the circle, δ is the logarithmic reduction coefficient, δ=lnα, α is the amplitude reduction rate. From the formula, we can see that the liquid viscosity increases with the increase of the logarithmic reduction coefficient.

[0097] In some implementation scenarios, the steps of using the viscosity sensor are as follows:

[0098] 1) Use a programmable high and low temperature test chamber to control the temperature change and constancy, and use a multi-channel signal collector to transmit the measurement information of the viscosity sensor to the host computer;

[0099] 2) Place 220cSt gear oil in a beaker. The amount of gear oil should be enough to just submerge the viscosity sensor probe.

[0100] 3) The viscosity of the oil used for measurement was determined to be 211.9 cSt at 40°C and 18.34 cSt at 100°C. According to the Walther equation: g l g (v+0.7)=A-Bl g (T+273.15), calculated A=8.88385586, B=3.41258374 (where v is kinematic viscosity; T is Celsius temperature; constants A and B are determined by measuring the viscosity values ​​corresponding to 40°C and 100°C);

[0101] 4) Select three viscosity points for measurement, namely 120 cSt, 150 cSt, and 600 cSt, wherein the viscosity value 120 cSt is the first preset viscosity value, and the viscosity value 150 cSt is the second preset viscosity value. The temperatures corresponding to the viscosity points of 120 cSt, 150 cSt, and 600 cSt are calculated by the Walther equation to be 50.4° C., 46.1° C., and 24.2° C., respectively;

[0102] 5) The programmable high and low temperature test chamber is kept at a constant temperature of 24.2°C for 1 hour, gradually heated to 46.1°C and kept constant for 1 hour, and then gradually heated to 50.4°C and kept constant for 1 hour. The viscosity sensor is first measured in the first resonance mode, and the measured viscosity value is greater than 120cSt. At this time, the measurement is still performed in the first resonance mode; when the temperature is increased to 46.1°C, the measured viscosity value is greater than 120cSt, and the viscosity sensor is still measured in the first resonance mode; when the temperature is increased to 50.4°C, the measured viscosity value is ≤120cSt, and the viscosity sensor is measured in the second resonance mode.

[0103] 6) The programmable high and low temperature test box is kept at a constant temperature of 50.4°C for 1 hour, gradually cooled to 46.1°C and kept constant for 1 hour, and then gradually cooled to 24.2°C and kept constant for 1 hour. If the viscosity sensor measures a viscosity value of <150cSt at 50.4°C, the second resonance mode is still used for measurement; when the temperature is reduced to 46.1°C, the viscosity sensor measures a viscosity value of ≥150cSt, and the viscosity sensor measures the viscosity in the first resonance mode; when the temperature is reduced to 24.2°C, the viscosity sensor measures a viscosity value of ≥150cSt, and the first resonance mode is still used for measurement;

[0104] 7) The viscosity sensor represents a viscosity value of 0cSt in the measurement state in the air. The vibrator 130 of the viscosity sensor performs vibration measurement in a damping mode in a viscous liquid environment. When the viscosity of the liquid is particularly large, the vibration state of the vibrator 130 will be very weak, which is regarded as the measurement upper limit of the sensor. In particular, the excitation signal of the sensor can be changed to increase the energy applied to the vibration actuator, thereby increasing the measurement upper limit of the viscosity sensor.

[0105] It should be noted that the purpose of the embodiments of the present application is to further understand the present invention, but those skilled in the art can understand that various replacements and modifications are possible without departing from the scope of the present invention and the attached requirements. Therefore, the present invention should not be limited to the contents disclosed in the embodiments.

[0106] In all the embodiments of the present application, "big" and "small" are relative, "more" and "less" are relative, and "up" and "down" are relative. The expressions of such relative terms are not elaborated in the embodiments of the present application.

[0107] It should be understood that the "in this embodiment", "in the embodiment of the present application" or "as an optional implementation" mentioned throughout the specification means that the specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, "in this embodiment", "in the embodiment of the present application" or "as an optional implementation" appearing throughout the specification does not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. Those skilled in the art should also be aware that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily required for the present application.

[0108] In the various embodiments of the present application, it should be understood that the size of the serial numbers of the above-mentioned processes does not necessarily mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0109] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A viscosity measurement method, characterized in that: Using a viscosity sensor device, the viscosity sensor device includes a vibration actuator and a vibration detection mechanism; The vibration actuator comprises a vibration conversion element, a circular flat diaphragm and a vibrator, wherein the vibration conversion element is arranged on the first surface of the circular flat diaphragm, the vibrator is arranged on the second surface of the circular flat diaphragm, and the vibrator vibrates along the normal or tangent direction of the circular flat diaphragm; The vibration detection mechanism includes a vibration detection circuit, and the vibration detection circuit is connected to the vibration conversion element; The viscosity measurement method comprises: driving the circular flat diaphragm to vibrate along the tangent direction of the circular flat diaphragm to obtain a first viscosity measurement value; judging whether the first viscosity measurement value is greater than a first viscosity preset value; if so, marking the first viscosity measurement value as true, ending the measurement or performing the next measurement; if not, driving the circular flat diaphragm to vibrate along the normal direction of the circular flat diaphragm to obtain a second viscosity measurement value; or The viscosity measurement method includes: driving the circular flat diaphragm to vibrate along the normal direction of the circular flat diaphragm to obtain a second viscosity measurement value; judging whether the second viscosity measurement value is less than a second viscosity preset value; if so, marking the second viscosity measurement value as true, ending the measurement or performing the next measurement; if not, driving the circular flat diaphragm to vibrate along the tangent direction of the circular flat diaphragm to obtain a third viscosity measurement value.

2. The viscosity measuring method according to claim 1, characterized in that: The device also includes a first housing, and the vibration conversion element is installed inside the first housing.

3. The viscosity measuring method according to claim 2, characterized in that: The device further comprises a connector, wherein the connector is respectively connected to the vibration detection circuit and the vibration conversion element.

4. The viscosity measuring method according to claim 3, characterized in that: The device further comprises a second housing, wherein the second housing is mounted on an outer surface of one side of the first housing, and the connector is mounted in the second housing.

5. The viscosity measuring method according to claim 4, characterized in that: The device further comprises a protective cover, which is arranged on the other outer surface of the first housing, and the vibrator is installed in the protective cover.

6. The viscosity measurement method according to claim 1, characterized in that: The vibrator is perpendicular to the surface of the circular flat diaphragm, and when the vibration conversion element works in the first resonance mode, it drives the circular flat diaphragm to vibrate along the tangent direction of the circular flat diaphragm.

7. The viscosity measurement method according to claim 6, characterized in that: When the vibration conversion element operates in the second resonance mode, the circular flat diaphragm is driven to vibrate along the normal direction of the circular flat diaphragm.

8. The viscosity measuring method according to claim 7, characterized in that: The vibration detection circuit includes a first signal transmission line and a second signal transmission line, and the first signal transmission line and the second signal transmission line are respectively connected to the vibration conversion element.

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