CN108426822B - Electromagnetic detection device and method for eccentric sensitivity of oil abrasive particles - Google Patents
Electromagnetic detection device and method for eccentric sensitivity of oil abrasive particles Download PDFInfo
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- CN108426822B CN108426822B CN201810620742.2A CN201810620742A CN108426822B CN 108426822 B CN108426822 B CN 108426822B CN 201810620742 A CN201810620742 A CN 201810620742A CN 108426822 B CN108426822 B CN 108426822B
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- 238000001514 detection method Methods 0.000 title claims abstract description 81
- 230000035945 sensitivity Effects 0.000 title claims abstract description 37
- 239000002245 particle Substances 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000002923 metal particle Substances 0.000 claims description 44
- 239000004677 Nylon Substances 0.000 claims description 19
- 229920001778 nylon Polymers 0.000 claims description 19
- 230000006698 induction Effects 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 8
- 238000011088 calibration curve Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 2
- 239000003921 oil Substances 0.000 description 26
- 238000012544 monitoring process Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000010705 motor oil Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/10—Investigating individual particles
- G01N15/1031—Investigating individual particles by measuring electrical or magnetic effects
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Abstract
The invention discloses an electromagnetic detection device and method for eccentric sensitivity of oil abrasive particles.
Description
Technical Field
The invention relates to a nondestructive detection device and a nondestructive detection method, in particular to an electromagnetic detection device and an electromagnetic detection method for eccentric sensitivity of oil abrasive particles.
Background
The electromagnetic detection technology for metal abrasive particles in engine oil is an effective technology in the current engine safety life monitoring technology, and is based on the electromagnetic eddy current detection principle, and a high-speed electromagnetic monitor and a high-sensitivity electromagnetic monitoring sensor are adopted to dynamically monitor the quantity and quality of the metal abrasive particles in an engine oil return pipe, so that the safety state of the engine is monitored and judged, the effective life of the engine is evaluated, and the like. In the process of monitoring the metal abrasive particles in the oil liquid by adopting an electromagnetic method, due to the electromagnetic detection characteristic, when the metal abrasive particles in the oil liquid deviate from a central axis and pass through an electromagnetic monitoring sensor, certain influence is generated on the detection sensitivity.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides an electromagnetic detection device and method for the eccentric sensitivity of oil abrasive particles, which are used for verifying the influence of the eccentricity of the oil abrasive particles on the detection sensitivity so as to compensate to a certain degree.
The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides an eccentric sensitivity electromagnetic detection device of fluid grit, includes a plurality of metal particles, nylon stick, electromagnetic eddy current detection coil, electromagnetic eddy current detector, its characterized in that: the diameter of the nylon rod is smaller than the inner diameter of the electromagnetic eddy current detection coil; the peripheral surface of the nylon rod is provided with a plurality of radial drill holes with different depths, or the end surface of the nylon rod is provided with a plurality of axial drill holes with different distances from the axis; the metal particles are used for simulating metal abrasive particles in oil, and are respectively placed and fixed on the inner bottom surfaces of the plurality of drill holes; the electromagnetic eddy current detecting coil is electrically connected with the electromagnetic eddy current detector.
The electromagnetic detection method for the eccentric sensitivity of the oil abrasive particles is characterized by comprising the following steps: comprises the following steps of (a) carrying out,
a. the electromagnetic eddy current detector excites the electromagnetic eddy current detection coil, and an induction magnetic field is generated in the electromagnetic eddy current detection coil;
b. the nylon rod penetrates through the electromagnetic detection coil at a constant speed, a plurality of metal particles fixed on the inner bottom surfaces of a plurality of drill holes sequentially pass through the electromagnetic detection coil to sequentially disturb an induction magnetic field in the electromagnetic eddy current detection coil, the electromagnetic eddy current detection coil generates an induction current signal, the electromagnetic eddy current detection coil transmits the induction current signal to the electromagnetic eddy current detector, and the electromagnetic eddy current detector processes and stores time domain and frequency domain parameters of the induction current signal generated by sequential disturbance of the plurality of metal particles; because the distances between the plurality of metal particles and the inner surface of the electromagnetic eddy current detection coil are different, the time domain and frequency domain parameters of induced current signals generated by the sequential disturbance of the plurality of metal particles are also different;
c. and (3) adopting the distance between a plurality of metal particles and the inner surface of the electromagnetic eddy current detection coil and the time domain and frequency domain parameters of induced current signals generated by the disturbance of the plurality of metal particles as coordinate axes to manufacture a calibration curve, wherein the calibration curve is an eccentric sensitivity curve of the oil abrasive particles, so that the influence of the eccentricity of the oil abrasive particles on the detection sensitivity is detected, and the detection signals are correspondingly compensated according to the sensitivity deviation degree.
Further, an electromagnetic detection method for eccentric sensitivity of oil abrasive particles is characterized by comprising the following steps: the method adopts a plurality of groups of metal particles, the material, size and structure of the metal particles in each group are the same, the material, size and structure of the metal particles in each group are different, the sensitivity of the metal particles with different materials, sizes and structures in different eccentric states is sequentially detected, and the corresponding compensation is further carried out on detection signals according to the sensitivity deviation degree.
The electromagnetic detection device and the electromagnetic detection method have the beneficial effects that the electromagnetic detection device and the electromagnetic detection method for the eccentric sensitivity of the oil abrasive particles comprise a plurality of metal particles, nylon rods, electromagnetic eddy current detection coils and electromagnetic eddy current detectors, the influence of the eccentricity of the oil abrasive particles on the detection sensitivity is detected through an eccentric sensitivity curve of the oil abrasive particles, and corresponding compensation is carried out on detection signals according to the sensitivity deviation degree.
The present invention will be described in further detail with reference to examples, but the electromagnetic detection apparatus and method for detecting eccentricity of oil abrasive particles according to the present invention are not limited to the examples.
Drawings
The invention will be further elucidated with reference to an embodiment in the drawing.
Fig. 1 is a schematic view of an electromagnetic detection device for detecting eccentricity of oil abrasive particles according to an embodiment of the present invention.
Fig. 2 is a schematic view of an electromagnetic detection device for detecting eccentricity of oil abrasive particles according to a second embodiment of the present invention.
In the figure, 1, metal particles, 2 nylon rods, 20 drill holes, 3 electromagnetic eddy current detection coils and 4 electromagnetic eddy current detectors.
Detailed Description
In a first embodiment, as shown in fig. 1, an electromagnetic detection device for detecting eccentricity sensitivity of oil abrasive particles includes a plurality of metal particles 1, a nylon rod 2, an electromagnetic eddy current detection coil 3, and an electromagnetic eddy current detector 4, and is characterized in that: the diameter of the nylon rod 2 is smaller than the inner diameter of the electromagnetic eddy current detection coil 3; the peripheral surface of the nylon rod 2 is provided with a plurality of radial drill holes 20 with different depths; the metal particles 1 are the same in material, size and structure, the metal particles 1 are used for simulating metal abrasive particles in oil, and the metal particles 1 are respectively placed and fixed on the inner bottom surfaces of the drill holes 20; the electromagnetic eddy current detection coil 3 is electrically connected with the electromagnetic eddy current detector 4.
In a second embodiment, as shown in fig. 2, an electromagnetic detection device for detecting eccentricity sensitivity of oil abrasive particles includes a plurality of metal particles 1, a nylon rod 2, an electromagnetic eddy current detection coil 3, and an electromagnetic eddy current detector 4, and is characterized in that: the diameter of the nylon rod 2 is smaller than the inner diameter of the electromagnetic eddy current detection coil 3; the end surface of the nylon rod 2 is provided with a plurality of axial drill holes 20 with different distances from the axis; the metal particles 1 are the same in material, size and structure, the metal particles 1 are used for simulating metal abrasive particles in oil, and the metal particles 1 are respectively placed and fixed on the inner bottom surfaces of the drill holes 20; the electromagnetic eddy current detection coil 3 is electrically connected with the electromagnetic eddy current detector 4.
The embodiment provides an electromagnetic detection method for eccentric sensitivity of oil abrasive particles, which adopts the device and is characterized in that: comprises the following steps of (a) carrying out,
a. the electromagnetic eddy current detector 4 excites the electromagnetic eddy current detection coil 3, and an induction magnetic field is generated in the electromagnetic eddy current detection coil 3;
b. the nylon rod 2 penetrates through the electromagnetic detection coil at a constant speed, the plurality of metal particles 1 fixed on the inner bottom surfaces of the plurality of drill holes 20 sequentially pass through the electromagnetic detection coil to sequentially disturb an induction magnetic field in the electromagnetic eddy current detection coil 3, the electromagnetic eddy current detection coil 3 generates an induction current signal, the electromagnetic eddy current detection coil 3 transmits the induction current signal to the electromagnetic eddy current detector 4, and the electromagnetic eddy current detector 4 processes and stores time domain and frequency domain parameters of the induction current signal generated by sequential disturbance of the plurality of metal particles 1; because the distances between the plurality of metal particles 1 and the inner surface of the electromagnetic eddy current detection coil 3 are different, the time domain and frequency domain parameters of induced current signals generated by the sequential disturbance of the plurality of metal particles 1 are also different;
c. the distance between the plurality of metal particles 1 and the inner surface of the electromagnetic eddy current detection coil 3 and the time domain and frequency domain parameters of induced current signals generated by the disturbance of the plurality of metal particles 1 are taken as coordinate axes to manufacture a calibration curve, and the calibration curve is an eccentric sensitivity curve of the oil abrasive particles, so that the influence of the eccentricity of the oil abrasive particles on the detection sensitivity is detected, and the compensation is performed to a certain degree.
In the embodiment, further, an electromagnetic detection method for the eccentric sensitivity of the oil abrasive particles adopts multiple groups of multiple metal particles 1, the multiple metal particles 1 in each group are the same in material, size and structure, the metal particles 1 in each group are different in material, size and structure, the sensitivity of the metal particles 1 of different materials, sizes and structures in different eccentric states is sequentially detected, and the detection signals are correspondingly compensated according to the deviation degree of the sensitivity.
The above embodiments are only used to further illustrate the electromagnetic detection apparatus and method for eccentric sensitivity of oil abrasive particles according to the present invention, but the present invention is not limited to the embodiments, and any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention fall within the protection scope of the technical solution of the present invention.
Claims (3)
1. The utility model provides an eccentric sensitivity electromagnetic detection device of fluid grit, includes a plurality of metal particles, nylon stick, electromagnetic eddy current detection coil, electromagnetic eddy current detector, its characterized in that: the diameter of the nylon rod is smaller than the inner diameter of the electromagnetic eddy current detection coil; the peripheral surface of the nylon rod is provided with a plurality of radial drill holes with different depths, or the end surface of the nylon rod is provided with a plurality of axial drill holes with different distances from the axis; the metal particles are used for simulating metal abrasive particles in oil, and are respectively placed and fixed on the inner bottom surfaces of the plurality of drill holes; the electromagnetic eddy current detecting coil is electrically connected with the electromagnetic eddy current detector.
2. An electromagnetic detection method for eccentric sensitivity of oil abrasive particles by using the device of claim 1, which is characterized in that: comprises the following steps of (a) carrying out,
a. the electromagnetic eddy current detector excites the electromagnetic eddy current detection coil, and an induction magnetic field is generated in the electromagnetic eddy current detection coil;
b. the nylon rod penetrates through the electromagnetic eddy current detection coil at a constant speed, a plurality of metal particles fixed on the inner bottom surfaces of a plurality of drill holes sequentially pass through the electromagnetic eddy current detection coil to sequentially disturb an induction magnetic field in the electromagnetic eddy current detection coil, the electromagnetic eddy current detection coil generates an induction current signal, the electromagnetic eddy current detection coil transmits the induction current signal to the electromagnetic eddy current detector, and the electromagnetic eddy current detector processes and stores time domain and frequency domain parameters of the induction current signal generated by sequential disturbance of the plurality of metal particles; because the distances between the plurality of metal particles and the inner surface of the electromagnetic eddy current detection coil are different, the time domain and frequency domain parameters of induced current signals generated by the sequential disturbance of the plurality of metal particles are also different;
c. and (3) adopting the distance between a plurality of metal particles and the inner surface of the electromagnetic eddy current detection coil and the time domain and frequency domain parameters of induced current signals generated by the disturbance of the plurality of metal particles as coordinate axes to manufacture a calibration curve, wherein the calibration curve is an eccentric sensitivity curve of the oil abrasive particles, so that the influence of the eccentricity of the oil abrasive particles on the detection sensitivity is detected, and the detection signals are correspondingly compensated according to the sensitivity deviation degree.
3. The electromagnetic detection method for the eccentricity sensitivity of the oil abrasive particles according to claim 2, characterized by comprising the following steps: furthermore, a plurality of groups of metal particles are adopted, the material, size and structure of the metal particles in each group are the same, the material, size and structure of the metal particles in each group are different, the sensitivity of the metal particles in different materials, sizes and structures is sequentially detected, the influence of the eccentricity of the abrasive particles on the detection sensitivity is detected, and the corresponding compensation is further performed on the detection signals according to the sensitivity deviation degree.
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| CN111307671A (en) * | 2019-12-26 | 2020-06-19 | 爱德森（厦门）电子有限公司 | Honeycomb-shaped online oil metal abrasive particle electromagnetic detection sensor |
| CN113720734B (en) * | 2021-09-12 | 2024-02-27 | 爱德森（厦门）电子有限公司 | Method for removing bubble interference by electromagnetic monitoring of oil liquid |
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|---|---|---|---|---|
| CN102331390A (en) * | 2010-11-30 | 2012-01-25 | 蒋伟平 | Flowing oil metal particle on-line monitoring sensor |
| CN102818754A (en) * | 2012-09-06 | 2012-12-12 | 爱德森（厦门）电子有限公司 | Method and device of improving online monitoring accuracy of engine oil metal abrasive particles |
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| SG11201704183WA (en) * | 2014-11-28 | 2017-06-29 | Parker Hannifin Mfg Ltd | Sensor apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102331390A (en) * | 2010-11-30 | 2012-01-25 | 蒋伟平 | Flowing oil metal particle on-line monitoring sensor |
| CN102818754A (en) * | 2012-09-06 | 2012-12-12 | 爱德森（厦门）电子有限公司 | Method and device of improving online monitoring accuracy of engine oil metal abrasive particles |
Non-Patent Citations (2)
| Title |
|---|
| 基于电感测量和光纤技术的在线油液监测方法研究;殷勇辉;《中国优秀博硕士学位论文全文数据库(博士)信息科技辑》;20040315(第1期);全文 * |
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