CN113029879A - Method for multi-frequency online monitoring of metal particles in oil and detection device thereof - Google Patents
Method for multi-frequency online monitoring of metal particles in oil and detection device thereof Download PDFInfo
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- 230000000737 periodic effect Effects 0.000 claims description 3
- 239000003921 oil Substances 0.000 description 28
- 238000010586 diagram Methods 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
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- 229910052742 iron Inorganic materials 0.000 description 1
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- G—PHYSICS
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Abstract
The invention discloses a method and a detection device for multi-frequency online monitoring of metal particles in oil, which are used for detecting the quantity and the quality of ferromagnetic particles in the oil in a long-term online power system pipeline (1), and are connected to a detection instrument (2) through a lead (21), wherein the detection device (3) comprises a first excitation coil (31), a second excitation coil (32), a detection coil (33) and a cylindrical hollow framework (34), and the method and the detection device are characterized in that the first excitation coil (31) and the second excitation coil (32) are symmetrically arranged on two sides of the detection coil (33) and concentrically wound on the peripheral surface of the hollow framework (34). The purpose of detecting particles in a large range is achieved by utilizing a plurality of detection frequencies and matching with different excitation amplitude changes.
Description
Technical Field
The invention relates to the technical field of nondestructive testing, in particular to a detection technology for online monitoring of ferromagnetic particles in oil, and particularly relates to a method and a detection device for online multi-frequency monitoring of metal particles in oil.
Background
In a power system, online or in-use oil dynamic and static monitoring is carried out, and metal particles are detected to be a main means for evaluating the pollution condition of lubricating oil and the service life fault of the power system. Although the existing optical analysis system is a relatively mature and traditional detection method, for distinguishing ferromagnetic particles from non-ferromagnetic particles and distinguishing the quality of detected particles, even if an iron spectrometer is used, not only a plurality of instruments are needed to complete, but also the steps are relatively complicated, so that the detection of the quality and the concentration of metal particles in oil liquid by using electromagnetic detection is relatively quick and simple.
However, particles in oil are generally between several micrometers and several thousands of micrometers, detection often fails to achieve the effect by using a single frequency, generally, in order to improve the sensitivity of small particles, only the following compression measurement range (i.e. less than or equal to 500um or 8000 um) can be considered, for large or agglomerated particles, quantification cannot be performed, and for particle size classification and total mass of unit volume of oil, necessary data for detection, the improvement of concentration detection of particles with different sizes and masses is urgently needed.
Aiming at the problems of the defects, the invention adopts the following technical scheme.
Disclosure of Invention
The invention aims to provide a method for multi-frequency online monitoring of metal particles in oil and a detection device thereof, and the technical scheme is as follows:
a method for multi-frequency online monitoring of metal particles in oil is used for detection and analysis of metal particles in oil of a long-term online power system, and comprises the following specific steps:
a. setting the power supply frequency: setting the characteristic range of the size of metal particles in oil liquid to be detected correspondingly, and setting corresponding detection alternating power supply frequency in a hierarchical manner;
b. detecting frequency selection: selecting corresponding detection alternating power supply frequency according to the size characteristic of the metal particles to be detected;
c. detecting oil metal particles: periodically repeating the alternating power supply frequency selected in the step b, loading the alternating power supply frequency on an eddy current detection exciting coil, circularly detecting the size characteristic of corresponding particles in the oil, and monitoring parameters such as the size characteristic and the concentration of metal particles in the oil for a long time;
d. and (3) data analysis and storage: and transmitting the data to an analysis instrument, displaying and storing analysis parameters, and alarming when the data exceeds a threshold value.
Further, the size range of the metal particles in the step a is set to three hierarchical ranges of small-size particles, medium-size particles and large-size particles, the frequency value (f1) of the small-size particles of the metal particles is in the range of 10um to 300um, the frequency value (f2) of the medium-size particles of the metal particles is in the range of 300um to 3000um, and the frequency value (f3) of the large-size particles is in the range of 3000um to 5000 um.
And the frequency value of the small-size particles (f1) is 200KHz, the frequency value of the medium-size particles (f2) is 100KHz, and the frequency value of the large-size particles (f3) is 50 KHz.
The detection step of the oil metal particles further comprises the step of adjusting the amplitude value of the alternating power supply of each fixed frequency value by switching each capacitance value connected in parallel with the exciting coil, and the detection method is suitable for the detection accuracy of different particles in the same particle size range.
Furthermore, the exciting coil is divided into a plurality of different turns through a tap output node, the switching can be adjusted according to the sequence of the number of the turns, each level of the increasing sequence turn coil is correspondingly matched with the exciting frequency for receiving the value of the decreasing sequence exciting frequency value, and each level of the increasing sequence turn coil is correspondingly connected with a capacitor of a capacitance value required by the oscillation of the corresponding coil in parallel and used for adjusting the amplitude value of the alternating exciting power supply of the frequency. Among them, a capacitance forming an optimum capacitance value of the resonance circuit with the inductance characteristic of the detection coil can be selected.
The invention also discloses a multi-frequency online monitoring device for detecting the quantity and the quality of the ferromagnetic particles in the oil in the pipeline (1) of the online power system for a long time, which is connected with the detection instrument (2) through a lead (21), wherein the detection device (3) comprises a first excitation coil (31), a second excitation coil (32), a detection coil (33) and a cylindrical hollow framework (34), and is characterized in that the first excitation coil (31) and the second excitation coil (32) are symmetrically arranged on two sides of the detection coil (33) and concentrically wound on the peripheral surface of the hollow framework (34).
Wherein the alternating power supply applied to the first excitation coil (31) and the second excitation coil (32) simultaneously is set to a periodic frequency variation, the power supply amplitude value being adjusted at each frequency value by a capacitance C connected in parallel to the excitation coils; and the first excitation coil (31) and the second excitation coil (32) are provided with a plurality of electrically connected tap nodes (35), and the number of turns of the coil formed by each tap node is sequentially matched with the different frequencies used by the excitation coils from small to large in the sequence of N1, N2 and N3.
Excitation alternating frequencies loaded by the excitation coils respectively corresponding to the node turns in the descending order are respectively used for detecting that the frequency value (f1) of small-size particles is 200KHz, the frequency value (f2) of medium-size particles is 100KHz, and the frequency value (f3) of large-size particles is 50 KHz.
And a PLC (38) connected to the first exciting coil (31) and the second exciting coil (32), wherein the frequency of the exciting alternating power supplied to the first exciting coil (31) and the second exciting coil (32) is set and switched by the PLC.
And a variable capacitor (36) connected to the first exciting coil (31) and the second exciting coil (32) for adjusting an oscillation capacitance value matching the frequency and the number of turns of the exciting coils.
Alternatively, capacitors (C1, C2, C3) having different capacitance values may be connected in parallel to each tap node connected to the first exciting coil (31) and the second exciting coil (32), and the oscillation capacitance value matching the frequency and the number of turns of the exciting coil may be selected by switching the switches.
And a variable capacitor connected in parallel to the detection coil (33) for oscillation-adjusting the signal value output from the detection coil, the variable capacitor C4 adjusting the oscillation capacitance value matching the frequency of the excitation coil.
According to the technical scheme, the invention has the following beneficial effects:
firstly, the invention utilizes a plurality of detection frequencies and cooperates with different excitation amplitude changes, namely, respectively utilizes high-frequency excitation and low-frequency excitation to apply different excitation currents in the same excitation coil, thereby obtaining the purpose of detecting particles in a large range, filling the blank of the electromagnetic detection method and achieving the beneficial effect of rapidly detecting the dynamic/static oil.
In the invention, the particle mass concentration of three levels is distinguished by three levels of low, medium and high excitation frequencies, and the particle mass concentration is used in combination with a signal amplifier, so that the detection angles of three levels of myopia, intermediate vision and hyperopia are realized, the uniformity of detection signals is realized, and the detection of different particle sizes is matched with the eddy current detection sensitivity with corresponding accuracy.
And thirdly, capacitance values with corresponding sizes are connected in parallel on the detection coils, the amplitude value of the excitation alternating power supply is further adjusted on each frequency excitation alternating power supply with different levels, and metal particles with three levels of quality are further distinguished, and the metal particles in the online oil liquid are uniformly monitored and detected in three resolution levels.
Drawings
FIG. 1 is a schematic diagram illustrating a preferred embodiment of the present invention;
FIG. 2 is a schematic flow chart of the preferred embodiment of the present invention;
FIG. 3 is a schematic diagram of the capacitance amplitude adjustment of the preferred embodiment of the present invention;
FIG. 4 is a circuit diagram of the preferred embodiment of the present invention;
FIG. 5 is a schematic diagram of a periodic power supply frequency according to the preferred embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a detecting device according to a preferred embodiment of the present invention;
FIG. 7 is a schematic structural diagram of another exemplary detecting device according to the present invention.
Detailed Description
The invention is further described with reference to the following drawings and detailed description.
As shown in fig. 1 to 4, a method for multi-frequency online monitoring of metal particles in oil is used for detection and analysis of metal particles in an oil pipeline 1 of a long-term online power system, and the detection method shown in fig. 2 includes the following specific steps:
a. setting the power supply frequency: setting the characteristic range of the size of metal particles in oil liquid to be detected correspondingly, and setting corresponding detection alternating power supply frequency in a hierarchical manner;
b. detecting frequency selection: selecting corresponding detection alternating power supply frequency according to the size characteristic of the metal particles to be detected;
c. detecting oil metal particles: periodically repeating the alternating power supply frequency selected in the step b, loading the alternating power supply frequency on an eddy current detection exciting coil, circularly detecting the size characteristic of corresponding particles in the oil, and monitoring parameters such as the size characteristic and the concentration of metal particles in the oil for a long time;
d. and (3) data analysis and storage: and transmitting the data to an analysis instrument, displaying and storing analysis parameters, and alarming when the data exceeds a threshold value.
Further, the size range of the metal particles in the step a is set to three hierarchical ranges of small-size particles, medium-size particles and large-size particles, the frequency value (f1) of the small-size particles of the metal particles is in the range of 10um to 300um, the frequency value (f2) of the medium-size particles of the metal particles is in the range of 300um to 3000um, and the frequency value (f3) of the large-size particles is in the range of 3000um to 5000 um. As shown in fig. 5, long term simultaneous cycles of metal particles in the pipeline oil may be detected by monitoring cycles of the frequency of the energized alternating power source from frequency f2 between t0 and t1, plus frequency f2 between t1 and t2, plus frequency f3 between t2 and t 3.
And further, as shown in the flowchart of fig. 2, the frequency values can be set to: the excitation frequency value f1 for detecting small-size particles is 200KHz, the excitation frequency value f2 for detecting medium-size particles is 100KHz, and the excitation frequency value f3 for detecting large-size particles is 50 KHz.
And as shown in fig. 3 and 4, the oil metal particle detection step further includes adjusting the amplitude value of the alternating power source amplitude of each fixed frequency value by switching the respective capacitance values connected in parallel to the exciting coil, so as to adapt to the accuracy of the detection of different size particles within the same particle size range.
Further, as shown in fig. 3, the excitation coil is divided into a plurality of different turns by a tap output node, and the switching can be adjusted according to the order of magnitude, each stage of the increasing order turn coil correspondingly matches the excitation frequency for receiving the decreasing order excitation frequency value, and each stage of the increasing order turn coil correspondingly connects in parallel with a capacitor of a capacitance value required by the oscillation of the corresponding coil, so as to adjust the amplitude value of the alternating excitation power source at the frequency. Among them, a capacitance forming an optimum capacitance value of the resonance circuit with the inductance characteristic of the detection coil can be selected.
In addition, as shown in fig. 1, fig. 6 and fig. 7, the invention also discloses a multi-frequency online detection device for monitoring metal particles in oil, which is used for detecting the quantity and quality of ferromagnetic particles in oil in a long-term online power system pipeline 1, and is connected to the detection instrument 2 through a lead 21, the detection device 3 comprises a first excitation coil 31, a second excitation coil 32, a detection coil 33 and a cylindrical hollow skeleton 34, and is characterized in that the first excitation coil 31 and the second excitation coil 32 are symmetrically arranged on two sides of the detection coil 33 and concentrically wound on the outer peripheral surface of the hollow skeleton 34.
Wherein, the alternating power source loaded on the first exciting coil 31 and the second exciting coil 32 simultaneously is set to be periodical frequency change, and the amplitude value of the power source is adjusted by a capacitor C connected in parallel with the exciting coils at each frequency value; and the first exciting coil 31 and the second exciting coil 32 are provided with a plurality of electrically connected tap nodes (35), and the coil turns of each tap node are sequentially matched with different frequencies used by the exciting coils from small to large in the sequence of N1, N2 and N3.
Excitation alternating frequencies loaded by the excitation coils respectively corresponding to the node turns in the descending order are respectively used for detecting that the frequency value (f1) of small-size particles is 200KHz, the frequency value (f2) of medium-size particles is 100KHz, and the frequency value (f3) of large-size particles is 50 KHz.
And a PLC programmer 38 connected to the first excitation coil 31 and the second excitation coil 32, wherein the frequency of the excitation alternating power supplied to the first excitation coil 31 and the second excitation coil 32 is set and switched by the PLC programmer. The PLC programmer is connected to the connection nodes of the first and second exciting coils 31 and 32 through a control data line 37.
And a variable capacitor 36 connected to the first exciting coil 31 and the second exciting coil 32, and adjusting an oscillation capacitance value matched with the exciting coil frequency and the number of turns. .
Alternatively, capacitors (C1, C2, C3) having different capacitance values may be connected in parallel to each tap node connected to the first exciting coil 31 and the second exciting coil 32, and the oscillation capacitance value matching the exciting coil frequency and the number of turns may be selected by switching the switches.
And a variable capacitor connected in parallel to the detection coil 33 for oscillation-adjusting a signal value output from the detection coil, and the variable capacitor C4 can adjust an oscillation capacitance value matching the frequency of the excitation coil.
As shown in the circuit diagram of fig. 4, the circuit device 4 passes the frequency converter 42 by the alternating power source 41, introduces the power source into the first excitation coil 31 and the second excitation coil 32, outputs the power source to the signal amplifier 43 by the detection coil 33, adjusts the signal by the filter 44 and the a/D converter 45, and transmits the signal to the display device 46.
The above is one embodiment of the present invention. Furthermore, it is to be understood that all equivalent or simple changes in the structure, features and principles described in the present patent concepts are included in the scope of the present patent.
Claims (10)
1. A method for multi-frequency online monitoring of metal particles in oil is used for detection and analysis of metal particles in oil of a long-term online power system, and comprises the following specific steps:
a. setting the power supply frequency: setting the characteristic range of the size of metal particles in oil liquid to be detected correspondingly, and setting corresponding detection alternating power supply frequency in a hierarchical manner;
b. detecting frequency selection: selecting corresponding detection alternating power supply frequency according to the size characteristic of the metal particles to be detected;
c. detecting oil metal particles: periodically repeating the alternating power supply frequency selected in the step b, loading the alternating power supply frequency on an eddy current detection exciting coil, circularly detecting the size characteristic of corresponding particles in the oil, and monitoring parameters such as the size characteristic and the concentration of metal particles in the oil for a long time;
d. and (3) data analysis and storage: and transmitting the data to an analysis instrument, displaying and storing analysis parameters, and alarming when the data exceeds a threshold value.
2. The method for multi-frequency online monitoring of metal particles in oil according to claim 1, wherein the metal particle size range in step a is set to three levels of small-size particles, medium-size particles and large-size particles, the small-size particle frequency value (f1) of the metal particle size range is 10um to 300um, the medium-size particle frequency value (f2) of the metal particle size range is 300um to 3000um, and the large-size particle frequency value (f3) of the metal particle size range is 3000um to 5000 um.
3. A multi-frequency online oil metal particle monitoring method according to claim 2, wherein the frequency value of the small-size particles (f1) is 200KHz, the frequency value of the medium-size particles (f2) is 100KHz, and the frequency value of the large-size particles (f3) is 50 KHz.
4. A multi-frequency on-line method for monitoring metal particles in oil according to claim 1, 2 or 3, wherein the step of detecting metal particles in oil further comprises adjusting the magnitude of the alternating power supply amplitude value of each fixed frequency value by switching the respective capacitance value connected in parallel to the exciting coil, so as to adapt to the accuracy of detecting different size particles within the same particle size range.
5. The method according to claim 4, wherein the excitation coil is divided into a plurality of different turns by a tap output node, and the switching can be adjusted according to the order of magnitude, each stage of increasing order turn coil correspondingly matches the excitation frequency for receiving the magnitude of decreasing order excitation frequency value, and each stage of increasing order turn coil correspondingly connects in parallel with a capacitor of capacitance value required by the corresponding coil to oscillate, so as to adjust the amplitude of the alternating excitation power source of the frequency.
6. A detection device for multi-frequency online monitoring of metal particles in oil is used for detecting the quantity and quality of ferromagnetic particles of oil in a long-term online power system pipeline (1), and is connected to a detection instrument (2) through a lead (21), the detection device (3) comprises a first excitation coil (31), a second excitation coil (32), a detection coil (33) and a cylindrical hollow framework (34), and is characterized in that the first excitation coil (31) and the second excitation coil (32) are symmetrically arranged on the peripheral surface of the hollow framework (34) concentrically wound on two sides of the detection coil (33),
wherein the alternating power supply applied to the first excitation coil (31) and the second excitation coil (32) simultaneously is set to a periodic frequency variation, the power supply amplitude value being adjusted at each frequency value by a capacitance connected in parallel to the excitation coils; and
the first excitation coil (31) and the second excitation coil (32) are provided with a plurality of electrically connected tap nodes (35), and the number of turns of the coil formed by each tap node is sequentially matched with different frequencies used by the excitation coils from small to large in sequence from N1, N2 and N3.
7. The device for multi-frequency online monitoring of metal particles in oil according to claim 6, wherein the excitation alternating frequencies loaded by the excitation coils respectively corresponding to the node turns in a descending order are respectively 200KHz for detecting the frequency value of small-size particles (f1), 100KHz for detecting the frequency value of medium-size particles (f2), and 50KHz for detecting the frequency value of large-size particles (f 3).
8. A multi-frequency on-line oil metal particle detection device according to claim 6 or 7, further comprising a PLC programmer (38) connected to the first excitation coil (31) and the second excitation coil (32), wherein the frequency of the excitation alternating power applied to the first excitation coil (31) and the second excitation coil (32) is set and switched by the PLC programmer.
9. A multi-frequency on-line monitoring device for detecting metal particles in oil according to claim 6, further comprising a variable capacitor (36) connected to the first excitation coil (31) and the second excitation coil (32) for adjusting the value of the oscillation capacitance to match the frequency and number of turns of the excitation coils.
10. A multi-frequency on-line monitoring device for detecting metal particles in oil according to claim 6, characterized by further comprising capacitors (C1, C2, C3) connected in parallel with different capacitance values at each tap node of the first excitation coil (31) and the second excitation coil (32), and the oscillation capacitance value matched with the frequency and the number of turns of the excitation coils is selected by switching switches.
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|---|---|---|---|---|
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| CN115078185A (en) * | 2022-06-10 | 2022-09-20 | 重庆邮电大学 | Oil particle detection sensor based on multi-excitation alternating magnetic field structure and detection method thereof |
| WO2024158084A1 (en) * | 2023-01-25 | 2024-08-02 | 주식회사 솔지 | Sensor capable of distinguishing sizes of iron by using eddy currents |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102955173A (en) * | 2011-08-24 | 2013-03-06 | 梅特勒-托利多安全线有限公司 | Metal detection apparatus |
| CN103217365A (en) * | 2013-03-29 | 2013-07-24 | 电子科技大学 | Online oil way abrasive particle monitoring device |
| CN103217366A (en) * | 2013-04-07 | 2013-07-24 | 电子科技大学 | Method for processing online oil path grain signal |
| CN103308431A (en) * | 2013-06-05 | 2013-09-18 | 桂林电子科技大学 | Sensor for monitoring metal abrasive particles in oil liquid on line and application method for sensor |
| CN103558127A (en) * | 2013-11-12 | 2014-02-05 | 北京理工大学 | Differential online oil abrasive particle sensor testing system |
| CN104458521A (en) * | 2014-11-21 | 2015-03-25 | 西安交通大学 | Online oil liquid monitoring device and method |
| CN106018191A (en) * | 2016-05-12 | 2016-10-12 | 李伟波 | Double-excitation solenoid type particle detection method achieved through full-frequency-band work condition self-adaptive filtering |
| CN106499489A (en) * | 2016-12-26 | 2017-03-15 | 吉林大学 | A kind of diesel particulate trap carbon loading amount detecting device and detection method |
| CN107340544A (en) * | 2016-11-29 | 2017-11-10 | 北京理工大学 | A kind of highly sensitive minute metallic particle on-line detecting system and method |
| CN206863240U (en) * | 2017-06-22 | 2018-01-09 | 济南大学 | Metallic particles detection means in fluid |
| CN109253963A (en) * | 2017-12-19 | 2019-01-22 | 北京纳米能源与系统研究所 | From driving grain count instrument and its method of counting |
| CN111024575A (en) * | 2019-12-30 | 2020-04-17 | 广研检测（广州）有限公司 | Oil metal particle detection device based on high-low frequency excitation |
| CN111024591A (en) * | 2019-12-30 | 2020-04-17 | 广研检测（广州）有限公司 | Online detection device for improving sensitivity of metal ferromagnetic particles in oil |
| CN112504921A (en) * | 2020-12-24 | 2021-03-16 | 爱德森（厦门）电子有限公司 | Phase amplitude analysis method for electromagnetically detecting oil abrasive particles and detection device thereof |
-
2021
- 2021-03-19 CN CN202110293468.4A patent/CN113029879B/en active Active
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102955173A (en) * | 2011-08-24 | 2013-03-06 | 梅特勒-托利多安全线有限公司 | Metal detection apparatus |
| CN103217365A (en) * | 2013-03-29 | 2013-07-24 | 电子科技大学 | Online oil way abrasive particle monitoring device |
| CN103217366A (en) * | 2013-04-07 | 2013-07-24 | 电子科技大学 | Method for processing online oil path grain signal |
| CN103308431A (en) * | 2013-06-05 | 2013-09-18 | 桂林电子科技大学 | Sensor for monitoring metal abrasive particles in oil liquid on line and application method for sensor |
| CN103558127A (en) * | 2013-11-12 | 2014-02-05 | 北京理工大学 | Differential online oil abrasive particle sensor testing system |
| CN104458521A (en) * | 2014-11-21 | 2015-03-25 | 西安交通大学 | Online oil liquid monitoring device and method |
| CN106018191A (en) * | 2016-05-12 | 2016-10-12 | 李伟波 | Double-excitation solenoid type particle detection method achieved through full-frequency-band work condition self-adaptive filtering |
| CN107340544A (en) * | 2016-11-29 | 2017-11-10 | 北京理工大学 | A kind of highly sensitive minute metallic particle on-line detecting system and method |
| CN106499489A (en) * | 2016-12-26 | 2017-03-15 | 吉林大学 | A kind of diesel particulate trap carbon loading amount detecting device and detection method |
| CN206863240U (en) * | 2017-06-22 | 2018-01-09 | 济南大学 | Metallic particles detection means in fluid |
| CN109253963A (en) * | 2017-12-19 | 2019-01-22 | 北京纳米能源与系统研究所 | From driving grain count instrument and its method of counting |
| CN111024575A (en) * | 2019-12-30 | 2020-04-17 | 广研检测（广州）有限公司 | Oil metal particle detection device based on high-low frequency excitation |
| CN111024591A (en) * | 2019-12-30 | 2020-04-17 | 广研检测（广州）有限公司 | Online detection device for improving sensitivity of metal ferromagnetic particles in oil |
| CN112504921A (en) * | 2020-12-24 | 2021-03-16 | 爱德森（厦门）电子有限公司 | Phase amplitude analysis method for electromagnetically detecting oil abrasive particles and detection device thereof |
Non-Patent Citations (2)
| Title |
|---|
| 贾然: "电感式磨粒在线监测传感器灵敏度提高方法", 湖南大学学报, pages 129 - 237 * |
| 郭静英: "二节螺线管式润滑油金属颗粒传感器研究", 仪表技术与传感器, pages 13 - 16 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114034739A (en) * | 2021-11-05 | 2022-02-11 | 大连海事大学 | Variable-frequency type abrasive particle material identification device and method |
| CN115078185A (en) * | 2022-06-10 | 2022-09-20 | 重庆邮电大学 | Oil particle detection sensor based on multi-excitation alternating magnetic field structure and detection method thereof |
| WO2024158084A1 (en) * | 2023-01-25 | 2024-08-02 | 주식회사 솔지 | Sensor capable of distinguishing sizes of iron by using eddy currents |
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