CN111380927A - Online grease detection sensor and detection method - Google Patents
Online grease detection sensor and detection method Download PDFInfo
- Publication number
- CN111380927A CN111380927A CN201811638439.1A CN201811638439A CN111380927A CN 111380927 A CN111380927 A CN 111380927A CN 201811638439 A CN201811638439 A CN 201811638439A CN 111380927 A CN111380927 A CN 111380927A
- Authority
- CN
- China
- Prior art keywords
- grease
- processing module
- sensor
- capacitive sensor
- capacitance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000004519 grease Substances 0.000 title claims abstract description 145
- 238000001514 detection method Methods 0.000 title claims abstract description 62
- 230000005294 ferromagnetic effect Effects 0.000 claims abstract description 51
- 239000002245 particle Substances 0.000 claims abstract description 51
- 230000001590 oxidative effect Effects 0.000 claims abstract description 40
- 238000012545 processing Methods 0.000 claims description 96
- 239000003990 capacitor Substances 0.000 claims description 38
- 238000000034 method Methods 0.000 claims description 17
- 239000010408 film Substances 0.000 claims description 12
- 238000007789 sealing Methods 0.000 claims description 5
- 239000010409 thin film Substances 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 abstract description 15
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 239000000523 sample Substances 0.000 description 16
- 238000010586 diagram Methods 0.000 description 6
- 230000003647 oxidation Effects 0.000 description 6
- 238000007254 oxidation reaction Methods 0.000 description 6
- 239000002253 acid Substances 0.000 description 5
- 238000004364 calculation method Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000010525 oxidative degradation reaction Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 150000007513 acids Chemical class 0.000 description 2
- 150000001298 alcohols Chemical class 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 150000002989 phenols Chemical class 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 241001422033 Thestylus Species 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010801 machine learning Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012549 training Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/22—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance
- G01N27/226—Construction of measuring vessels; Electrodes therefor
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/22—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance
- G01N27/221—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance by investigating the dielectric properties
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/22—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance
- G01N27/227—Sensors changing capacitance upon adsorption or absorption of fluid components, e.g. electrolyte-insulator-semiconductor sensors, MOS capacitors
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The invention provides an online grease detection sensor which can detect the concentration of ferromagnetic particles and the oxidative disintegration degree of grease to be detected, and can judge the wear condition of a bearing according to the concentration of the ferromagnetic particles and know the use condition of the grease in time according to the oxidative disintegration degree of the grease, so that operation and maintenance personnel can be reminded to maintain in time, the faults of vehicles and mechanical equipment are avoided, the maintenance interval is prolonged, and the maintenance cost is reduced.
Description
Technical Field
The invention relates to the technical field of sensor detection, in particular to an online grease detection sensor and a detection method.
Background
In industrial equipment, grease is required to be added into mechanical bearings so as to reduce friction and prolong the service life of the bearings. Such as high-speed rail motor drive bearings, fan bearings, etc. After the bearing is used for a long time, the bearing is abraded, and if the abrasion cannot be found in time, mechanical equipment faults can be caused, and unnecessary loss is caused. Since the wear of the bearing is accelerated by the oxidative degradation of the oil, it is necessary to check the wear condition of the bearing and the oxidative degradation of the oil in time. However, in the prior art, the bearing wear condition and the grease oxidative degradation condition are checked by people according to experience judgment, and the bearing and the grease condition cannot be detected in time, so that unnecessary loss is caused.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the online grease detection sensor and the detection method, which can detect the concentration of ferromagnetic particles and the oxidative disintegration degree of grease of the detected grease, remind operation and maintenance personnel to maintain in time, avoid the faults of vehicles and mechanical equipment, prolong the maintenance interval and reduce the maintenance cost.
The invention provides an online grease detection sensor, which comprises: the device comprises a detection part, an output part, a first capacitive sensor, a second capacitive sensor, a signal processing module, a data processing module and a digital signal output lead; the first capacitive sensor and the second capacitive sensor have the same physical structure, and a magnet is arranged on the back of the first capacitive sensor;
the detection part is connected with the output part through the sealing part;
the detection part is inserted into the detected grease of the bearing through the detection hole;
the first capacitive sensor and the second capacitive sensor are arranged at the detection part and are in contact with the detected grease;
the signal processing module, the data processing module and the digital signal output lead are all arranged at the output part;
the first capacitive sensor and the second capacitive sensor are both connected with the signal processing module;
the signal processing module is connected with the data processing module;
the data processing module is connected with external intelligent equipment through the digital signal output lead;
the signal processing module is used for processing a first signal of the first capacitance sensor acquired in real time to obtain a first capacitance which can be identified by the data processing module; the second capacitance sensor is also used for processing a second signal of the second capacitance sensor acquired in real time to obtain a second capacitance which can be identified by the data processing module;
the data processing module is used for analyzing the first capacitor and the second capacitor, obtaining the concentration and the oxidative disintegration degree of ferromagnetic particles of the detected grease, and outputting an analysis result to external intelligent equipment through the digital signal output lead.
Optionally, the method further includes: a temperature sensor;
the temperature sensor is arranged at the detection part and is connected with the signal processing module;
the temperature sensor is used for detecting the temperature of the grease and sending a detected grease temperature signal to the signal processing module;
the signal processing module is used for carrying out signal processing on the grease temperature signal to obtain the grease temperature which can be identified by the data processing module;
and the data processing module is used for carrying out temperature compensation on the concentration and the oxidative disintegration degree of the ferromagnetic particles according to the temperature of the grease.
Optionally, the first capacitive sensor and the second capacitive sensor are formed from a plurality of E-shaped electrodes in a cross-hand configuration to form a capacitive sensor.
Optionally, the first capacitive sensor includes: at least one capacitive sensor; the second capacitive sensor comprising: at least one capacitive sensor.
Optionally, the method further includes: a third capacitive sensor;
the third capacitive sensor is arranged at the detection part and is connected with the signal processing module;
the surface of the third capacitive sensor is plated with a thin film; the film is a film of a polar molecule;
the signal processing module is used for acquiring a third signal of the third capacitive sensor in real time, processing the third signal to obtain a third capacitor which can be identified by the data processing module, and sending the third capacitor to the data processing module;
and the data processing module is used for obtaining the polar molecule content in the detected grease according to the third capacitor.
In a second aspect, the present invention provides an online grease detection method, including:
acquiring a first capacitor of a first capacitor sensor provided with a magnet in the detected grease;
collecting a second capacitance of a second capacitance sensor in the detected grease; wherein the first and second capacitive sensors have the same physical structure;
and obtaining the concentration and the oxidative disintegration degree of the ferromagnetic particles of the detected grease according to the first capacitor and the second capacitor.
Optionally, the obtaining the concentration of ferromagnetic particles and the degree of oxidative disintegration of the detected grease according to the first capacitance and the second capacitance includes:
obtaining the concentration of ferromagnetic particles of the detected grease according to the ratio of the first capacitor to the second capacitor;
and obtaining the oxidative disintegration degree of the detected grease according to the variable quantity of the second capacitor.
Optionally, the method further includes:
collecting the grease temperature of the detected grease by using a temperature sensor;
and according to the temperature of the grease, carrying out temperature compensation on the concentration and the oxidative disintegration degree of the ferromagnetic particles.
Optionally, the method further includes:
collecting the polar molecule content of the detected grease by using a third capacitive sensor with a film plated on the surface;
and obtaining the oxidative disintegration degree of the detected grease according to the polar molecule content.
Optionally, the first capacitive sensor comprises a plurality of capacitive sensors; the second capacitive sensor comprises a plurality of capacitive sensors;
the first capacitance is a maximum value of capacitance in the first capacitive sensor; the second capacitance is a maximum value of capacitance in the second capacitive sensor.
According to the online grease detection sensor provided by the invention, the ferromagnetic particle concentration and the grease oxidative disintegration degree of the detected grease can be detected, a person skilled in the art can judge the bearing wear condition according to the ferromagnetic particle concentration, and can also know the use condition of the grease in time according to the grease oxidative disintegration degree, so that an operation and maintenance person can be reminded to maintain in time, the faults of vehicles and mechanical equipment are avoided, the maintenance interval is prolonged, and the maintenance cost is reduced.
Drawings
In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
FIG. 1 is a schematic diagram of an on-line grease detection sensor according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an on-line grease detection sensor probe according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a capacitive sensor according to an embodiment of the present invention;
fig. 4 is a flowchart of an online grease detection method according to an embodiment of the present invention.
Where 1 denotes a probe portion, 2 denotes an output portion, 3 denotes a seal portion, 4 denotes a fixing structure, 5 denotes a probe end face, and 6 denotes a seal end face.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.
The invention provides an online grease detection sensor and a detection method. Embodiments of the present invention will be described below with reference to the drawings.
Referring to fig. 1, fig. 1 is a schematic diagram of an online grease detection sensor according to an embodiment of the present invention, where the online grease detection sensor according to the embodiment includes: the device comprises a detection part 1, an output part 2, a first capacitive sensor, a second capacitive sensor, a signal processing module, a data processing module and a digital signal output lead; the first capacitive sensor and the second capacitive sensor have the same physical structure, and a magnet is arranged on the back of the first capacitive sensor; the detection part 1 is connected with the output part 2 through the sealing part 3; the detection part 1 is inserted into the detected grease of the bearing through a detection hole; the first capacitive sensor and the second capacitive sensor are arranged at the detection part 1 and are in contact with the detected grease; the signal processing module, the data processing module and the digital signal output lead are all arranged at the output part 2; the first capacitive sensor and the second capacitive sensor are both connected with the signal processing module; the signal processing module is connected with the data processing module; the data processing module is connected with external intelligent equipment through the digital signal output lead; the signal processing module is used for processing a first signal of the first capacitance sensor acquired in real time to obtain a first capacitance which can be identified by the data processing module; the second capacitance sensor is also used for processing a second signal of the second capacitance sensor acquired in real time to obtain a second capacitance which can be identified by the data processing module; the data processing module is used for analyzing the first capacitor and the second capacitor, obtaining the concentration and the oxidative disintegration degree of ferromagnetic particles of the detected grease, and outputting an analysis result to external intelligent equipment through the digital signal output lead.
Through above-mentioned online grease detects sensor, can detect out ferromagnetic particle concentration and the grease oxidation molting degree that is detected the grease, technical staff in the field can judge the bearing wearing and tearing situation according to ferromagnetic particle concentration, can also in time know the in service behavior of grease according to grease oxidation molting degree, and then can remind fortune dimension personnel in time to maintain, avoid vehicle and mechanical equipment trouble, the extension is maintained the interval, reduces the maintenance cost.
Wherein, the detection part 1 may include: a probe and a probe rod; the first and second capacitive sensors may be provided on the probe and/or the stylus. The end face detected by the probe is a detection end face 5.
The online grease detection sensor may further include: and a sealing part 3. Survey position 1 and can be connected with output position 2 through sealed position 3, this sealed position 3 can cover the inspection hole completely, and sealed position 3 is sealed terminal surface 6 with the face of being connected of surveying position 1, through setting up sealed position 3, can avoid the grease to flow from the inspection hole.
The online grease detection sensor may further include: a fixed structure 4. The fixing structure 4 may be provided at a joint between the probe portion 1 and the sealing portion 3, may be a part of the probe rod, or may be present separately. The fixing structure 4 may be a screw thread or other fixing structures 4. The fixing structure 4 can fix the on-line grease detecting sensor on the bearing. Knurling can also be arranged on the fixing structure 4 or the output part 2 so as to facilitate screwing the online grease detection sensor into a detection hole of the bearing.
The signal processing module and the data processing module may adopt ASIC, DSP or CPU.
Because the temperature of the grease is increased due to the friction of the bearing during the operation of the machine, the temperature of the grease contacted with the detection part 1 is higher than the external temperature. In order to ensure the normal operation of the signal processing module and the data processing module, the signal processing module and the data processing module need to be arranged at a position with lower temperature, namely the output part 2, or only the capacitance sensor is arranged at the detection part 1 in the fixed structure 4.
The signal processing module can acquire a first signal of the first capacitance sensor and a second signal of the second capacitance sensor in real time, process the first signal to obtain a first capacitance which can be identified by the data processing module, process the second signal to obtain a second capacitance which can be identified by the data processing module, and then send the first capacitance and the second capacitance to the data processing module. The data processing module analyzes and calculates the first capacitance and the second capacitance, and can obtain the concentration and the oxidative disintegration degree of the ferromagnetic particles of the detected grease.
The signal processing module can adopt an analog-to-digital converter. And converting the analog signal of the capacitive sensor into a digital signal, and sending the digital signal to the data processing module for calculation.
Wherein, the back of first capacitive sensor is provided with magnet, and through setting up magnet, ferromagnetic particle in the surface of first capacitive sensor can the adsorbed grease improves first capacitive sensor's dielectric constant, and then improves the numerical value of first electric capacity. When no ferromagnetic particles exist in the detected grease, the physical structures of the first capacitive sensor and the second capacitive sensor are completely the same, so that the acquired first capacitance is equal to the acquired second capacitance; when ferromagnetic particles exist in detected grease, the surface of the first capacitance sensor adsorbs the ferromagnetic particles, the surrounding dielectric constant can be greatly increased, and then the numerical value of the first capacitance can be increased, the ratio of the first capacitance C1 to the second capacitance C2, namely C1/C2 is larger than 1, and the ratio can be 1.1 to dozens of times. The ferromagnetic particles greatly increase the dielectric constant around the E-type electrode, increasing substantially linearly, and the curve flattens when the ferromagnetic particle concentration exceeds a certain value, e.g., 2000 PPM. Therefore, the ferromagnetic particle concentration can be obtained by the ratio C1/C2 of the first capacitance C1 and the second capacitance C2.
When the oil is oxidized, the oxidation products are generally polar molecules such as water, acid, alcohol, phenol, and the like. The antioxidant added in advance to the grease generally contains alkaline substances, the alkaline substances can react with acid to generate salt and water, and the acidity is inhibited, but the polarity of the grease is increased, and the dielectric constant of the grease is increased due to the increase of the polarity of the grease. The result of the oxidation of the grease is that the first capacitor C1 and the second capacitor C2 increase simultaneously and proportionally. The concentration of the ferromagnetic particles is increased to cause the first capacitance C1 to increase, and the second capacitance C2 is basically unchanged, so that the oxidative disintegration degree of the grease can be calculated through the change value of the second capacitance.
The first capacitive sensor and the second capacitive sensor have the same physical structure, and preferably, the first capacitive sensor and the second capacitive sensor can be formed by a plurality of E-shaped electrodes according to a cross-hand configuration. For example, if the first capacitive sensor and the second capacitive sensor each have one capacitive sensor, the first capacitive sensor and the second capacitive sensor may be formed by 3 or 4E-type electrodes, and if the first capacitive sensor and the second capacitive sensor each have 3E-type electrodes, one of the E-type electrodes is a common electrode, and the other two E-type electrodes form capacitive sensors with the common electrode; if the number of the E-type electrodes is 4, the two electrodes form a capacitance sensor. If there are multiple capacitive sensors, the formation process is similar, where there may be multiple common electrodes, thereby enabling the formation of multiple capacitive sensors. As shown in fig. 2 and 3. Fig. 2 is a schematic diagram of a sensor probe, and fig. 3 is a schematic diagram of a sensor structure.
In the present invention, the first capacitive sensor may have a plurality of capacitive sensors, and the second capacitive sensor may also have a plurality of capacitive sensors.
After the detection part 1 is inserted into grease, the surfaces of some sensors are not necessarily in complete contact with the grease due to certain fluidity of the grease, and when the surfaces of some sensors are not in complete contact with the grease, the measurement result is inaccurate; in addition, when the capacitive sensor of the detection portion 1 is dirty, the detection result is also affected. Therefore, a plurality of capacitive sensors can be arranged, the largest capacitance value can be selected for calculation, and the detection accuracy can be improved.
For example, the first capacitive sensor includes a plurality of capacitive sensors, the signal processing module and the data processing module obtain a plurality of first capacitances, and when the data processing module performs calculation, the largest one of the capacitance values may be selected as the first capacitance.
In the present invention, grease is often added to the device, requiring complete replacement if the probe and probe are dirty. If only the probe is dirty, the grease is added as usual to extrude the dirty part out, and the probe does not need to be replaced completely. In addition, if the probe and the probe rod are dirty, the equipment is worn greatly and needs maintenance.
In the invention, a temperature sensor can be arranged at the detection part 1, the temperature sensor can detect the grease temperature of the detected grease in real time and send the detected grease temperature signal to a signal processing module, the signal processing module can process the grease temperature signal to obtain the grease temperature which can be identified by a data processing module, and the data processing module can perform temperature compensation on the concentration and the oxidative disintegration degree of the ferromagnetic particles according to the grease temperature.
At lower temperatures, the following two effects can occur: 1. the adsorption capacity of the grease to the ferromagnetic particles is reduced along with the temperature rise, when the temperature is lower, the resistance of the ferromagnetic particles to the grease is larger, and the adsorption capacity of the first capacitive sensor to the ferromagnetic particles is lower. 2. At lower temperatures, the dielectric constant of various polar molecules is low, e.g., water, acids, alcohols, phenols, and the like.
When the temperature is lower, the two effects result in that the first capacitance, the second capacitance and the ratio C1/C2 are lower under the action of the same concentration of ferromagnetic particles and polar molecules, so that the concentration of the ferromagnetic particles and the oxidative disintegration degree need to be compensated for by the temperature. The higher the temperature, the more downwardly adjusted compensation is required for C1/C2.
When the temperature compensation is carried out on the oxidative disintegration degree, firstly, the temperature compensation is carried out on the dielectric constant of the grease, and then the oxidative disintegration degree is calculated according to the change values of the second capacitor after the temperature compensation and the initial second capacitor. The initial second capacitance refers to a capacitance value of the second capacitive sensor when the grease is not oxidized and disintegrated.
Before temperature compensation is carried out on the concentration and the oxidative disintegration degree of the ferromagnetic particles, the grease needs to be tested to obtain compensation parameters of the temperature compensation. When the grease is tested, the temperature range of the grease from-40 ℃ to 100 ℃ can be tested, and grease parameters are tested every 5 ℃, wherein the grease parameters comprise the dielectric constant of the grease and the concentration of ferromagnetic particles contained in the grease. And obtaining a temperature compensation coefficient according to the test result.
In the invention, the online grease detecting sensor can also be provided with a third capacitive sensor, and the third capacitive sensor is arranged at the detection part 1 and is connected with the signal processing module. The surface of the third capacitive sensor is plated with a film; the film is a film of a polar molecule. The signal processing module is used for acquiring a third signal of the third capacitive sensor in real time, processing the third signal to obtain a third capacitor which can be identified by the data processing module, and sending the third capacitor to the data processing module; and the data processing module is used for obtaining the polar molecule content in the detected grease according to the third capacitor.
The film plated on the surface of the third capacitive sensor is a polar molecule film, the capacity of combining water and acid is enhanced, and after the third capacitive sensor adsorbs polar molecules, the surrounding dielectric constant can be greatly increased, so that the third capacitance of the third capacitive sensor can be correspondingly increased, and the content of the polar molecules in the detected grease can be calculated through the change value of the third capacitance. The polar molecules may include, among others: water, acids, alcohols, phenols, and the like. The polar molecule is a product of oil oxidative disintegration, so that more accurate oxidative disintegration degree can be obtained by calculating the content of the polar molecule in the oil, and the online oil detection sensor is more sensitive.
In the invention, the data processing module can calculate the concentration and the oxidative disintegration degree of the ferromagnetic particles of the detected grease, can also compare the calculation result with a preset threshold value so as to warn a user of the abrasion condition of a bearing and the oxidative disintegration condition of the grease, and sends the calculation result to external intelligent equipment. For example, whether the ferromagnetic particle concentration exceeds a threshold concentration is judged, if yes, the ferromagnetic particle concentration is sent to an external intelligent device, and a preset threshold value is warned to be exceeded; if not, the ferromagnetic particle concentration may be sent only to the smart device. The oxidative disintegration degree of the grease is similar to the judgment process of the concentration of the ferromagnetic particles. The data processing module can also pre-establish a suggestion model, and the suggestion model is established by training a machine learning algorithm according to data such as historical ferromagnetic particle concentration, oxidative disintegration degree and maintenance suggestion. After the data processing model calculates ferromagnetic particle concentration and oxidative disintegration degree, the current bearing state and maintenance suggestion can be output to external intelligent equipment through a digital signal output wire according to the ferromagnetic particle concentration and the oxidative disintegration degree, and then the working personnel can timely maintain the equipment, and unnecessary loss is avoided.
The above is an online grease detection sensor provided by the invention.
Based on the same inventive concept as the above online grease detection sensor, correspondingly, the embodiment of the present invention further provides an online grease detection method, as shown in fig. 4.
When the method is implemented, the online grease detection sensor can be used for detecting, and the execution main body of the method can be the data processing module or other processors.
The invention provides an online grease detection method, which comprises the following steps:
step S101: the first capacitance of the first capacitance sensor provided with the magnet in the detected grease is collected.
Step S102: collecting a second capacitance of a second capacitance sensor in the detected grease; wherein the first and second capacitive sensors have the same physical structure.
Step S103: and obtaining the concentration and the oxidative disintegration degree of the ferromagnetic particles of the detected grease according to the first capacitor and the second capacitor.
Through gathering first electric capacity and second electric capacity, can calculate ferromagnetic particle concentration and the grease oxidation molting degree that is detected the grease according to first electric capacity and second electric capacity, the technical staff in the field can judge the bearing wear condition according to ferromagnetic particle concentration, can also in time know the in service behavior of grease according to grease oxidation molting degree, and then can remind fortune dimension personnel in time to maintain, avoids vehicle and mechanical equipment trouble, prolongs the maintenance interval, reduces the maintenance cost.
In a specific embodiment provided by the present invention, the obtaining the ferromagnetic particle concentration and the oxidative disintegration degree of the detected grease according to the first capacitance and the second capacitance includes: obtaining the concentration of ferromagnetic particles of the detected grease according to the ratio of the first capacitor to the second capacitor; and obtaining the oxidative disintegration degree of the detected grease according to the variable quantity of the second capacitor.
In a specific embodiment provided by the present invention, the method may further include: collecting the grease temperature of the detected grease by using a temperature sensor; and according to the temperature of the grease, carrying out temperature compensation on the concentration and the oxidative disintegration degree of the ferromagnetic particles.
In a specific embodiment provided by the present invention, the method may further include: collecting the polar molecule content of the detected grease by using a third capacitive sensor with a film plated on the surface; and obtaining the oxidative disintegration degree of the detected grease according to the polar molecule content.
In one particular embodiment provided by the present invention, the first capacitive sensor comprises a plurality of capacitive sensors; the second capacitive sensor comprises a plurality of capacitive sensors; the first capacitance is a maximum value of capacitance in the first capacitive sensor; the second capacitance is a maximum value of capacitance in the second capacitive sensor.
This embodiment is substantially similar to the embodiment of an on-line grease detecting sensor and therefore is described in a relatively simple manner, and reference may be made to the partial description of the embodiment of an on-line grease detecting sensor.
The invention provides an online grease detection method.
While the invention has been described with reference to specific embodiments, the invention is not limited thereto, and various equivalent modifications and substitutions can be easily made by those skilled in the art within the technical scope of the invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. An online grease detection sensor comprising: detection position and output position, its characterized in that still includes: the device comprises a first capacitive sensor, a second capacitive sensor, a signal processing module, a data processing module and a digital signal output lead; the first capacitive sensor and the second capacitive sensor have the same physical structure, and a magnet is arranged on the back of the first capacitive sensor;
the detection part is connected with the output part through the sealing part;
the detection part is inserted into the detected grease of the bearing through the detection hole;
the first capacitive sensor and the second capacitive sensor are arranged at the detection part and are in contact with the detected grease;
the signal processing module, the data processing module and the digital signal output lead are all arranged at the output part;
the first capacitive sensor and the second capacitive sensor are both connected with the signal processing module;
the signal processing module is connected with the data processing module;
the data processing module is connected with external intelligent equipment through the digital signal output lead;
the signal processing module is used for processing a first signal of the first capacitance sensor acquired in real time to obtain a first capacitance which can be identified by the data processing module; the second capacitance sensor is also used for processing a second signal of the second capacitance sensor acquired in real time to obtain a second capacitance which can be identified by the data processing module;
the data processing module is used for analyzing the first capacitor and the second capacitor, obtaining the concentration and the oxidative disintegration degree of ferromagnetic particles of the detected grease, and outputting an analysis result to external intelligent equipment through the digital signal output lead.
2. The sensor of claim 1, further comprising: a temperature sensor;
the temperature sensor is arranged at the detection part and is connected with the signal processing module;
the temperature sensor is used for detecting the temperature of the grease and sending a detected grease temperature signal to the signal processing module;
the signal processing module is used for carrying out signal processing on the grease temperature signal to obtain the grease temperature which can be identified by the data processing module;
and the data processing module is used for carrying out temperature compensation on the concentration and the oxidative disintegration degree of the ferromagnetic particles according to the temperature of the grease.
3. The sensor of claim 1, wherein the first capacitive sensor and the second capacitive sensor are formed from a plurality of E-shaped electrodes in a cross-hand configuration to form a capacitive sensor.
4. The sensor of claim 1, wherein the first capacitive sensor comprises: at least one capacitive sensor; the second capacitive sensor comprising: at least one capacitive sensor.
5. The sensor of claim 1, further comprising: a third capacitive sensor;
the third capacitive sensor is arranged at the detection part and is connected with the signal processing module;
the surface of the third capacitive sensor is plated with a thin film; the film is a film of a polar molecule;
the signal processing module is used for acquiring a third signal of the third capacitive sensor in real time, processing the third signal to obtain a third capacitor which can be identified by the data processing module, and sending the third capacitor to the data processing module;
and the data processing module is used for obtaining the polar molecule content in the detected grease according to the third capacitor.
6. An online grease detection method is characterized by comprising the following steps:
acquiring a first capacitor of a first capacitor sensor provided with a magnet in the detected grease;
collecting a second capacitance of a second capacitance sensor in the detected grease; wherein the first and second capacitive sensors have the same physical structure;
and obtaining the concentration and the oxidative disintegration degree of the ferromagnetic particles of the detected grease according to the first capacitor and the second capacitor.
7. The method of claim 6, wherein obtaining the ferromagnetic particle concentration and the degree of oxidative disintegration of the detected grease according to the first capacitance and the second capacitance comprises:
obtaining the concentration of ferromagnetic particles of the detected grease according to the ratio of the first capacitor to the second capacitor;
and obtaining the oxidative disintegration degree of the detected grease according to the variable quantity of the second capacitor.
8. The method of claim 7, further comprising:
collecting the grease temperature of the detected grease by using a temperature sensor;
and according to the temperature of the grease, carrying out temperature compensation on the concentration and the oxidative disintegration degree of the ferromagnetic particles.
9. The method of claim 6, further comprising:
collecting the polar molecule content of the detected grease by using a third capacitive sensor with a film plated on the surface;
and obtaining the oxidative disintegration degree of the detected grease according to the polar molecule content.
10. The method of claim 6, wherein the first capacitive sensor comprises a plurality of capacitive sensors; the second capacitive sensor comprises a plurality of capacitive sensors;
the first capacitance is a maximum value of capacitance in the first capacitive sensor; the second capacitance is a maximum value of capacitance in the second capacitive sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811638439.1A CN111380927A (en) | 2018-12-29 | 2018-12-29 | Online grease detection sensor and detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811638439.1A CN111380927A (en) | 2018-12-29 | 2018-12-29 | Online grease detection sensor and detection method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111380927A true CN111380927A (en) | 2020-07-07 |
Family
ID=71222473
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811638439.1A Pending CN111380927A (en) | 2018-12-29 | 2018-12-29 | Online grease detection sensor and detection method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111380927A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113030200A (en) * | 2021-03-01 | 2021-06-25 | 深圳市先波科技有限公司 | Oil liquid detection device and detection method thereof |
| CN116124663A (en) * | 2023-04-13 | 2023-05-16 | 北京致感科技有限公司 | Online ferromagnetic particle detection system |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4841244A (en) * | 1985-10-11 | 1989-06-20 | Her Majesty The Queen In Right Of Canada As Represented By The Minister Of National Defence | Method and apparatus for on-sine monitoring of wear in machinery |
| CN1394772A (en) * | 2001-07-05 | 2003-02-05 | 汪浩 | Vehicle and ship lubricating oil real time detection method and its device |
| CN104132970A (en) * | 2014-08-06 | 2014-11-05 | 北京华安广通科技发展有限公司 | High-precision sensor for detecting ferromagnetic particles in lubricating oil |
| CN104165908A (en) * | 2014-09-09 | 2014-11-26 | 北京华盛立德科技有限公司 | Online lubricating oil quality monitoring capacitive sensor with automatic compensation function |
| CN105606696A (en) * | 2015-12-17 | 2016-05-25 | 北京至感传感器技术研究院有限公司 | Oil liquid quality parameter detection method, sensor and on-line detection device |
| CN105806760A (en) * | 2016-05-19 | 2016-07-27 | 北京至感传感器技术研究院有限公司 | Online oil liquid quality sensor |
| CN108801868A (en) * | 2017-05-03 | 2018-11-13 | 北京至感传感器技术研究院有限公司 | Particulate matter on-line monitoring system in liquid oil |
-
2018
- 2018-12-29 CN CN201811638439.1A patent/CN111380927A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4841244A (en) * | 1985-10-11 | 1989-06-20 | Her Majesty The Queen In Right Of Canada As Represented By The Minister Of National Defence | Method and apparatus for on-sine monitoring of wear in machinery |
| CN1394772A (en) * | 2001-07-05 | 2003-02-05 | 汪浩 | Vehicle and ship lubricating oil real time detection method and its device |
| CN104132970A (en) * | 2014-08-06 | 2014-11-05 | 北京华安广通科技发展有限公司 | High-precision sensor for detecting ferromagnetic particles in lubricating oil |
| CN104165908A (en) * | 2014-09-09 | 2014-11-26 | 北京华盛立德科技有限公司 | Online lubricating oil quality monitoring capacitive sensor with automatic compensation function |
| CN105606696A (en) * | 2015-12-17 | 2016-05-25 | 北京至感传感器技术研究院有限公司 | Oil liquid quality parameter detection method, sensor and on-line detection device |
| CN105806760A (en) * | 2016-05-19 | 2016-07-27 | 北京至感传感器技术研究院有限公司 | Online oil liquid quality sensor |
| CN108801868A (en) * | 2017-05-03 | 2018-11-13 | 北京至感传感器技术研究院有限公司 | Particulate matter on-line monitoring system in liquid oil |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113030200A (en) * | 2021-03-01 | 2021-06-25 | 深圳市先波科技有限公司 | Oil liquid detection device and detection method thereof |
| CN113030200B (en) * | 2021-03-01 | 2023-11-21 | 深圳市先波科技有限公司 | Oil liquid detection device and detection method thereof |
| CN116124663A (en) * | 2023-04-13 | 2023-05-16 | 北京致感科技有限公司 | Online ferromagnetic particle detection system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2573525B1 (en) | Oil sensor | |
| US8854058B2 (en) | Measurement method of degradation/alteration degree of lubricant oil and measurement device thereof | |
| CN114184229A (en) | Switch cabinet operation environment monitoring system | |
| CN111380927A (en) | Online grease detection sensor and detection method | |
| US11988117B2 (en) | Engine lubrication oil consumption and condition monitoring | |
| US9995344B2 (en) | Capacitance measurement in a bearing | |
| CN1685228A (en) | Fluid condition monitor | |
| ATE552643T1 (en) | METHOD AND ARRANGEMENT FOR MONITORING THE STORAGE CURRENT OF AN ELECTRICAL MACHINE | |
| US10962521B2 (en) | Method and system of condition monitoring | |
| CN111812305B (en) | On-line lubricating oil detection sensor | |
| CN116399402B (en) | Fault early warning system of wireless sensor for ecological environment monitoring | |
| EP2932248B1 (en) | Lubricating grease condition monitoring | |
| CN208334373U (en) | Marine diesel lubricating oil moisture prior-warning device | |
| JP2016099118A (en) | Bearing abnormality determination device, bearing abnormality determination system and bearing abnormality determination program | |
| Minakata et al. | Proposal of fruit battery method for estimating oil palm ripeness | |
| EP2350758B1 (en) | Method for monitoring a potentiometric measuring probes | |
| CN111006995A (en) | Early warning system of environment corrosion state | |
| KR20180050160A (en) | System and apparatus for diagnosis of oltc and diagnosis method of partial discharge | |
| JP4103632B2 (en) | Oil deterioration detection method and apparatus | |
| CN111289575A (en) | Method for detecting quality of conductive pipe bar based on relative motion | |
| CN116878728B (en) | Pressure sensor fault detection analysis processing system | |
| CN217384126U (en) | Motion displacement monitoring system of reciprocating connecting rod of cigarette machine equipment | |
| US20240085364A1 (en) | Sensing unit with functionalized electrodes | |
| CN207636434U (en) | A kind of lubricating oil Detecting Wear Particles in Oil device | |
| JPS60260838A (en) | Instrument for measuring oil quality |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200707 |