阅读说明：本技术 一种便携式润滑油状态检测设备 (Portable lubricating oil state check out test set ) 是由 易书理 于 2019-09-12 设计创作，主要内容包括：本发明公开了一种便携式润滑油状态检测设备,包括传感器、加热模块、循环系统、容器和微控制器,容器用于盛放待测润滑油,加热模块用于加热待测润滑油,循环系统用于使容器的待测润滑油保持循环流动,传感器用于采集待测润滑油的温度、粘度、密度和介电常数,微控制器用于控制加热模块和循环系统工作,微控制器根据传感器采集的数据进行拟合获得不同温度下润滑油的粘度函数、密度函数和介电常数函数,对基础油类型进行判别以及与标准产品数据进行对比获得产品匹配度。本发明能够在户外、设备现场和润滑油交易市场给润滑油厂商、设备厂商、终端客户提供润滑油质量重要理化指标,判定方向。(The invention discloses portable lubricating oil state detection equipment which comprises a sensor, a heating module, a circulating system, a container and a microcontroller, wherein the container is used for containing lubricating oil to be detected, the heating module is used for heating the lubricating oil to be detected, the circulating system is used for keeping the lubricating oil to be detected in the container to circularly flow, the sensor is used for collecting the temperature, the viscosity, the density and the dielectric constant of the lubricating oil to be detected, the microcontroller is used for controlling the heating module and the circulating system to work, the microcontroller is used for fitting according to data collected by the sensor to obtain a viscosity function, a density function and a dielectric constant function of the lubricating oil at different temperatures, and the type of base oil is judged and compared with standard product data to obtain the. The invention can provide important physicochemical indexes of the quality of the lubricating oil for lubricating oil manufacturers, equipment manufacturers and terminal customers outdoors, equipment sites and lubricating oil trading markets to judge the direction.)

1. The portable lubricating oil state detection equipment is characterized by comprising a sensor, a heating module, a circulating system, a container and a microcontroller, wherein the container is used for containing lubricating oil to be detected, the heating module is used for heating the lubricating oil to be detected, the circulating system is used for enabling the lubricating oil to be detected of the container to keep circulating flow, the sensor is used for collecting the temperature, the viscosity, the density and the dielectric constant of the lubricating oil to be detected, the microcontroller is used for controlling the heating module and the circulating system to work, the microcontroller is used for fitting according to data collected by the sensor to obtain the viscosity function, the density function and the dielectric constant function of the lubricating oil at different temperatures, and the type of base oil is distinguished and compared with standard product data to obtain the product matching degree.

2. The portable lubricating oil state detection device of claim 1, wherein the microcontroller performs fitting according to the data collected by the sensor to obtain the viscosity function, the density function and the dielectric constant function of the lubricating oil at different temperatures, specifically: firstly, selecting a screening function, and screening the parameters of the collected lubricating oil to be detected; secondly, selecting a function relation of the viscosity, the density and the dielectric constant of the lubricating oil to be detected and the temperature; and finally, obtaining a viscosity function relation, a density function relation and a dielectric constant function relation of the lubricating oil at different temperatures according to the screened parameters of the lubricating oil to be tested and a least square method.

3. The portable lubricating oil state detection device of claim 1, wherein the microcontroller determines the moisture content and/or aging characteristics of the lubricating oil to be detected according to the data collected by the sensor.

4. A portable lubricating oil condition detection apparatus according to claim 3, characterised in that the moisture content and/or ageing characteristics of the lubricating oil to be measured are functionally related to the dielectric constant.

5. The portable lubricating oil state detection device of claim 1, comprising a base, wherein the microcontroller is embedded in the base, and the base is provided with a USB port, a power port and a communication port.

6. a portable lubricant condition detection apparatus according to claim 5, wherein the container is provided with a detachably mountable cover plate for sealing, and the sensor, the heating module and the cover plate are integrally designed.

7. The portable lubricant condition detection apparatus of claim 5, comprising a bracket mounted on the base, wherein the sensor and the heating module are detachably mounted on the bracket.

8. the portable lubricant state detection device of claim 1, wherein the circulation system employs a stirring device or a circulation pump device.

9. The portable lubricating oil condition monitoring device of claim 1, wherein the container is a vacuum stainless steel cup or ceramic cup or quartz cup with a capacity of 150ml to 300 ml.

Technical Field

The invention relates to the technical field of lubricating oil detection, in particular to portable lubricating oil state detection equipment.

Background

In industrial production, the lubricating oil is like the blood of equipment, and the quality of the blood is directly related to whether the equipment can normally operate. The lubricating oil system of the equipment is a core system for ensuring the stable operation of the equipment, a plurality of components can generate friction during the operation of the equipment, and the lubricating oil system fully lubricates each part generating friction, so that the friction damage is avoided, and the safe and stable operation of each friction pair is ensured. The functions of the lubricating oil also include cooling, sealing, cleaning and heat transfer.

In market operation activities and industrial production, lubricating oil which does not meet technical indexes or has unmatched models is often encountered, and the oil/liquid needs to be rapidly and simply detected on site for laboratory factories without professional analysis. For example, the basic indexes such as viscosity, density, base oil type, etc. of the new oil/liquid (without a laboratory) need to be checked by the test factory to avoid equipment damage due to asymmetry of the oil/liquid information. The lubricating oil of the equipment in use needs to be periodically detected to prevent the oil from being aged, and the equipment is continuously used.

In the market, the viscosity of lubricating oil is detected by a general portable falling ball method for oil detection, and the accuracy rate of the method is low. Reagents are also used to test the acid number of the oil, and approximate acid number data is obtained from the color change, and the liquid solvent of the method is inconvenient to carry. Therefore, a portable lubricant oil detection device which is simple, fast, accurate and cheap is a development direction. The chinese patent CN 109612879a discloses a name "a portable field measuring device for the viscosity of lubricating oil", which can only provide the viscosity value of lubricating oil. The CN 106441433a chinese patent discloses a device for detecting oil product, which can directly measure and obtain viscosity, density and dielectric strength, but does not process data and give out specific methods.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides portable lubricating oil state detection equipment which is simple in structure, convenient to implement, accurate in data and capable of detecting lubricating oil on site.

The technical scheme adopted by the invention is as follows:

The utility model provides a portable lubricating oil state check out test set, includes sensor, heating module, circulation system, container and microcontroller, the container is used for holding the lubricating oil that awaits measuring, the heating module is used for heating the lubricating oil that awaits measuring, circulation system is used for making the lubricating oil that awaits measuring of container keeps the circulation to flow, the sensor is used for gathering the temperature, viscosity, density and the dielectric constant of the lubricating oil that awaits measuring, microcontroller is used for controlling the heating module with circulation system work, microcontroller carries out the fitting according to the data that the sensor was gathered obtains the viscosity function, density function and the dielectric constant function of lubricating oil under the different temperatures, differentiates the base oil type and obtains the product matching degree with standard product data contrast.

preferably, the microcontroller performs fitting according to the data collected by the sensor to obtain the viscosity function, the density function and the dielectric constant function of the lubricating oil at different temperatures, specifically: firstly, selecting a screening function, and screening the parameters of the collected lubricating oil to be detected; secondly, selecting a function relation of the viscosity, the density and the dielectric constant of the lubricating oil to be detected and the temperature; and finally, obtaining a viscosity function relation, a density function relation and a dielectric constant function relation of the lubricating oil at different temperatures according to the screened parameters of the lubricating oil to be tested and a least square method.

Preferably, the microcontroller judges the moisture content and/or the aging characteristic of the lubricating oil to be detected according to the data collected by the sensor.

Preferably, the moisture content and/or aging characteristics of the lubricating oil to be tested are functionally related to the dielectric constant.

Preferably, the detection device comprises a base, the microcontroller is embedded in the base, and the base is provided with a USB port, a power port and a communication port.

Preferably, the container is provided with a detachable mounting cover plate for sealing, and the sensor, the heating module and the cover plate are designed in an integrated manner.

preferably, the detection device comprises a bracket, the bracket is mounted on the base, and the sensor and the heating module are detachably mounted on the bracket.

Preferably, the circulating system adopts a stirring device or a circulating pump device.

Preferably, the container is a vacuum stainless steel cup or a ceramic cup or a quartz cup with the capacity of 150 ml-300 ml.

Compared with the prior art, the invention has the beneficial effects that:

the portable lubricating oil detection device is simple in structure and convenient to realize, and can calculate and obtain physical and chemical indexes such as viscosity, density and dielectric constant of oil products at different temperatures in a short time on site;

At a client, the acid value, the additive content, the metal content change and the water content of the currently used oil product can be obtained through multi-working-condition comparison of new and old lubricating oil data, so that the on-site judgment of the currently used oil product is made;

The type of the measured lubricating oil is known through data, and technical support is provided for identifying true and false oil products.

Of course, it is not necessary for any product that embodies the invention to achieve all of the above-described advantages simultaneously.

Drawings

FIG. 1 is a schematic diagram illustrating the connection of the main components of a portable lubricant status detecting device according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a portable lubricant status detecting device according to an embodiment of the present invention;

Fig. 3 is a schematic view of a display interface of a portable lubricant condition detection apparatus according to an embodiment of the present invention.

In the figure, 1-sensor; 2-a microcontroller; 3-heating the module; 4-a circulation system; 5-a container; 6-a stirring device; 7-a base; 8-bracket.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Referring to fig. 1 to 3, a portable lubricating oil state detection device includes a sensor 1, a heating module 3, a circulating system 4, a container 5 and a microcontroller 2, where the container 5 is used to hold lubricating oil to be detected, the heating module 3 is used to heat the lubricating oil to be detected, the circulating system 4 is used to keep the lubricating oil to be detected in the container 5 to circularly flow, the sensor 1 is used to collect the temperature, viscosity, density and dielectric constant of the lubricating oil to be detected, the microcontroller 2 is used to control the heating module 3 and the circulating system 4 to operate, the microcontroller 2 performs fitting according to data collected by the sensor 1 to obtain the viscosity function, density function and dielectric constant function of the lubricating oil at different temperatures, and determines the type of base oil and compares the type with data of a standard product to obtain the degree of matching of.

As an example, the sensor 1 is a commercially available sensor, which can be a sensor integrating temperature, viscosity, density and dielectric constant, or a sensor separately and independently tested, but it is required that the maximum temperature of each sensor can reach more than 110 ℃ and has good compatibility with the lubricating oil, such as mineral oil and additives, to be tested. The preferred method for measuring viscosity is the tuning fork method.

as an embodiment, the container 5 is placed on a base 7, the microcontroller 2 is embedded in the base 7, and the base 7 is provided with a USB port, a power port and a communication port. Algorithms, discriminant functions and standard product data for the microcontroller 2 to process data can be input through the USB port. The external power supply can be directly provided for the device through the power supply port or the internal power supply of the device can be charged. The detection result can be sent to the remote client through the communication port.

As an example, the container 5 is provided with a detachably mounted cover for sealing, the sensor 1, the heating module 3 and the cover being of one-piece design. When detecting the lubricating oil parameter that awaits measuring, the apron closes, and during sensor 1 and heating module 3 immerged the lubricating oil that awaits measuring this moment, the integral type design of sensor 1, heating module 3 and apron makes equipment be in and tests under the encapsulated situation, avoids external disturbance.

As an example, the circulation system 4 employs a stirring device 6 or a circulation pump device. Preferably, the motor drives the fan blades to stir the lubricating oil to be measured in the container 5, so that the lubricating oil to be measured is kept in a circulating flowing state, the temperature consistency of the lubricating oil to be measured is ensured, and the measurement of parameters such as temperature, viscosity, density and dielectric constant is facilitated. If a circulating pump device is adopted, the circulating pump device drives the lubricating oil to be measured to flow into and out of the container 5, and the temperature consistency of the lubricating oil to be measured is kept.

As shown in FIG. 2, a bracket 8 is mounted on the base 7, and the sensor 1, the heating module 3 and the stirring device 6 are detachably mounted on the bracket 8. In this embodiment, when the device is used for detection, the sensor 1, the heating module 3 and the stirring device 6 are inserted into the container 5, and the sensor 1, the heating module 3 and the stirring device 6 are fixed on the bracket 8. When no equipment inspection is required at this time, the container 5 is in a sealed state. Preferably, the heating module 3 and the stirring device 6 are integrated. The heating module 3 is preferably a wound resistance wire.

In the testing process, lubricating oil to be tested is injected into the container 5, the heating device, the stirring device 6 and the sensor 1 are immersed into the lubricating oil to be tested in the container 5, and the temperature-rising stirring program is started. The stirring speed and the heating rate are adjusted according to the data fed back by the sensor 1, and the heating speed and the stirring rate are preferably adjusted according to different viscosities. The heating rate of the lubricating oil to be measured is preferably 1-3 ℃/min; a speed regulating motor is selected to control the rotating speed of the stirring device 6, and the rotating speed is preferably 50 to 500 revolutions per minute; the container 5 is preferably a vacuum stainless steel cup or a ceramic cup or a quartz cup having a capacity of 150ml to 300 ml.

The working temperature range of the microcontroller is controlled as follows: -25 ℃ to +60 DEG C

Storage temperature: -25 ℃ to +85 DEG C

Relative humidity: 95% no condensation

Protection grade: IP20

The data processing method comprises the following steps:

The data of the sensor 1 is first rejected

v，ρ，ξ＝f(v，ρ，ξ)

(1) Most of the commercially available sensors receive a kinematic viscosity which is first converted into a kinematic viscosity:

Wherein v is kinematic viscosity in mm ²/s and dynamic viscosity in mPa.s.

(2) Then assume a viscosity function relationship: among them, preferred is

log(log(v+m))＝a-b×log(T+273)

Or log (log (v + n + exp (c1+ c2v + c3v ²) ═ c4-c5log (T +273)

Wherein m and n are constants, preferably constants between 0.5 and 0.9, and a, b, c1 and c5 are coefficients required to be calculated optimally. Therefore, the kinematic viscosity v under different working conditions can be obtained.

(3) Assuming a functional relationship of density: among them, preferred is

ρ＝a+b(T+273)+c(T+273)²+d(T+273)³

Wherein a, b, c and d are coefficients obtained by optimization calculation.

(4) Two functions were set up to relate δ (acid value + additive content + metal content) and σ (moisture content) to the dielectric constant, respectively: among them, preferred is

ξ＝a+b(T+273)+c(T+273)²

δ＝H(ξ)

σ＝F(ξ)

Wherein a, b and c are coefficients obtained by optimization calculation.

(5) Setting a judgment function to judge the type of the base oil fluid

fluid type＝θ(v，ρ，ξ)

Wherein the optimization calculation method is preferably a least square method.

(6) Because data among product batches have deviation, a standard product database is established, a verification function is established, and the condition that the product matching degree match is confirmed by an unknown sample to the standard product database is ensured

match＝C(v，ρ，ξ，v_s，ρ_s，ξ_s)

v _s is standard kinematic viscosity, and v is the kinematic viscosity of the sample to be detected;

rho _s is standard density, and rho is the density of the sample to be measured;

ξ _s is the standard dielectric constant and ξ is the dielectric strength of the sample to be measured.

As shown in fig. 3, the display interface of the detection device displays the detection results, including viscosity, density, moisture, acid value + metal content + additive content, and sample matching degree. The client can receive detection information uploaded by the detection device, and the client can be an android system, an IOS system or a webpage. The hardware is preferably: smart phones, smart tablets. Look-back past data and a standard curve database can be stored on the APP. The APP can check the temperature, viscosity, density, delta (acid value + additive content + metal content), sigma (moisture content) and base oil type of the oil to be detected.

The detection equipment has a simple structure, is convenient to realize, can detect the quality of series high-low viscosity lubricating oil such as gear oil and compressor oil outdoors, and judges the type of the base oil of the lubricating oil. The detection equipment can provide important physicochemical indexes of the quality of the lubricating oil for lubricating oil manufacturers, equipment manufacturers and terminal customers outdoors, on equipment sites and in the market of lubricating oil trading, and judges the direction.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.