CN212622366U - High-precision cross capacitance oil detection sensor - Google Patents
High-precision cross capacitance oil detection sensor Download PDFInfo
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- CN212622366U CN212622366U CN202022002574.6U CN202022002574U CN212622366U CN 212622366 U CN212622366 U CN 212622366U CN 202022002574 U CN202022002574 U CN 202022002574U CN 212622366 U CN212622366 U CN 212622366U
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Abstract
The utility model provides a high accuracy cross capacitance fluid detection sensor, include: the device comprises a cross capacitor, a first circular copper guard ring, a second circular copper guard ring, a brass metal protective cover and an electrode connector; the cross capacitor comprises a first Teflon tube and four symmetrically arranged brass electrodes attached to the outer wall of the first Teflon tube, wherein the interval between any two brass electrodes is 0.5 mm; the first circular copper guard ring and the second circular copper guard ring are respectively arranged at the upper end and the lower end of the outer wall of the first Teflon tube, and are spaced from the two ends of the brass electrode by 0.5 mm; the brass metal protective cover is arranged outside the cross capacitor, the interval between the brass metal protective cover and the cross capacitor is 1mm, and a second Teflon tube is arranged between the brass metal protective cover and the cross capacitor; the electrode connector is connected with four identical brass electrodes. The technical problems of high detection cost, time consumption, single detection parameter, low detection precision and the like in the prior art are solved.
Description
Technical Field
The utility model relates to a boats and ships equipment hydraulic system fault detection technical field particularly, especially relates to a high accuracy cross capacitance fluid detection sensor.
Background
Various rotary machines use lubricating oil to ensure their proper operation, wear is one of the most common failure modes that cause various rotary machine devices to operate abnormally and fail, and metal particles of different sizes and shapes generated during the wear of rotating parts of the machine devices may be mixed with the lubricating oil, seriously impairing the performance of the machine devices. Therefore, detecting such particles is necessary to predict and prevent catastrophic failure of the machine. The detection of metal particles in the oil has important significance for avoiding the faults of the rotating machinery. By monitoring the quality or properties of the wear particles in the lubricating oil, the condition of the machine parts in direct contact with the lubricating oil can be obtained. During normal operation, the particle size and its concentration do not cause machine failure. When an abnormal condition occurs, the size and concentration of the metal particles increase. Thus, by continuously monitoring the metal particles in the lubricating oil, catastrophic failure of the machine can be avoided. The condition of the lubricating oil is monitored by chemical, induction, ferrography, optical methods, and the like.
Among them, spectroscopy is a chemical method, an off-line, costly detection method, and time consuming. This detection method does not provide real-time monitoring of the oil. Induction provides on-line monitoring, but can only be used to detect ferromagnetic particles. Non-ferromagnetic metal particles in the oil cannot be detected. Optical methods provide real-time monitoring, but the opacity of the oil will be of a reasonable accuracy for detection. Accuracy is affected by the refractive index of the medium and the shape of the metal particles in the oil. In addition, the detection method can cause pollution to the oil.
SUMMERY OF THE UTILITY MODEL
According to the above-mentioned it is high to offer among the prior art to detect the cost, consuming time, and it is single to detect the parameter, detects technical problem such as the precision is low, and provides a high accuracy cross capacitance fluid detection sensor, the utility model discloses the sensor realizes detecting each trace impurity in the lubricating oil through monitoring electric capacity peak value.
The utility model discloses a technical means as follows:
a high accuracy cross capacitance oil detection sensor, comprising: the device comprises a cross capacitor, a first circular copper guard ring, a second circular copper guard ring, a brass metal protective cover and an electrode connector;
the cross capacitor comprises a first Teflon tube and four symmetrically arranged brass electrodes attached to the outer wall of the first Teflon tube, and the interval between any two brass electrodes is 0.5 mm;
the first circular copper guard ring is arranged at the upper end of the outer wall of the first Teflon tube, and the first circular copper guard ring is 0.5mm away from one end of the brass electrode; the second circular copper guard ring is arranged at the lower end of the outer wall of the first Teflon tube, and the second circular copper guard ring is spaced from the other end of the brass electrode by 0.5 mm;
the brass metal protective cover is arranged outside the cross capacitor, the interval between the brass metal protective cover and the cross capacitor is 1mm, and a second Teflon tube is arranged between the brass metal protective cover and the cross capacitor;
the electrode connector is connected with four identical brass electrodes.
Further, the diameter of said second teflon tube is larger than the diameter of said first teflon tube.
Further, the four brass electrodes are 18mm in length and 2mm in thickness.
Further, the length of each of the first circular copper guard ring and the second circular copper guard ring is 5mm, and the thickness of each of the first circular copper guard ring and the second circular copper guard ring is 2mm as same as that of the brass electrode.
Further, the brass metal protective cover has an outer diameter of 16mm and a thickness of 1 mm.
Furthermore, polytetrafluoroethylene is filled between any two brass electrodes.
Furthermore, the high-precision cross capacitance oil detection sensor also comprises a detection device, the detection device comprises a base and a bracket fixedly connected to the base, and the bracket is respectively provided with a first clamping device and a second clamping device; the first clamping device is connected with the high-precision cross capacitance oil detection sensor; the high-precision cross capacitance oil detection sensor is electrically connected with the AD7150 capacitance digital converter and the PC end; the second clamping device is connected with a third Teflon tube, the third Teflon tube penetrates through the center of the first Teflon tube, the top end of the third Teflon tube is connected with the funnel, a container is arranged right below the bottom end of the third Teflon tube, and a filter screen is suspended between the container and the third Teflon tube.
Further, the diameter of said third teflon tube is smaller than the diameter of said first teflon tube.
Compared with the prior art, the utility model has the advantages of it is following:
the utility model provides a high accuracy cross capacitance fluid detection sensor, the capacitance value of sensor can change because of metal particle's in the fluid existence, and the electric capacity response of sensor is very accurate. The utility model discloses the sensor has advantages such as fast, the precision is high, with low costs, metal particle in the on-line measuring lubricating oil that can be quick, accurate, low-cost, non-maintaining.
Based on the reason above, the utility model discloses can extensively promote in fields such as marine facilities hydraulic system fault detection.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a schematic diagram of the sensor structure of the present invention.
Fig. 2 is a longitudinal sectional view of the sensor of the present invention.
Fig. 3 is a schematic structural diagram of the sensor and the detecting device of the present invention.
Fig. 4 is a signal diagram obtained by the metal particles measured by the sensor of the present invention.
In the figure: 1. a first circular copper retaining ring; 2. a second circular copper retaining ring; 3. a brass metal shield; 4. an electrode connector; 5. a first teflon tube; 6. a brass electrode; 7. a second teflon tube; 8. a base; 9. a support; 10. a first holding device; 11. a second holding device; 12. a high-precision cross capacitance oil detection sensor; 13. an AD7150 capacitive-to-digital converter; 14. a PC terminal; 15. a third teflon tube; 16. a funnel; 17. a container; 18. and (4) a filter screen.
Detailed Description
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. Any specific values in all examples shown and discussed herein are to be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element in question must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of the present invention: the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and if not stated otherwise, the terms have no special meaning, and therefore, the scope of the present invention should not be construed as being limited.
As shown in fig. 1-2, the utility model provides a high accuracy cross capacitance fluid detection sensor, include: the device comprises a cross capacitor, a first circular copper guard ring 1, a second circular copper guard ring 2, a brass metal protective cover 3 and an electrode connector 4;
the cross capacitor comprises a first Teflon tube 5 and four symmetrically arranged brass electrodes 6 attached to the outer wall of the first Teflon tube 5, wherein the interval between any two brass electrodes 6 is 0.5 mm; and polytetrafluoroethylene is filled between any two brass electrodes 6.
The first circular copper guard ring 1 is arranged at the upper end of the outer wall of the first Teflon tube 5, and the first circular copper guard ring 1 is spaced from one end of the brass electrode 6 by 0.5 mm; the second circular copper guard ring 2 is arranged at the lower end of the outer wall of the first Teflon tube 5, and the second circular copper guard ring 2 is spaced from the other end of the brass electrode 5 by 0.5 mm;
the brass metal protective cover 3 is arranged outside the cross capacitor, the interval between the brass metal protective cover 3 and the cross capacitor is 1mm, and a second Teflon tube 7 is arranged between the brass metal protective cover 3 and the cross capacitor;
the electrode connector 4 connects four identical brass electrodes 6.
In a preferred embodiment of the present invention, the diameter of the second teflon tube 7 is larger than the diameter of the first teflon tube 5. In specific implementation, the diameter of the first teflon tube 5 is 8mm, and the diameter of the second teflon tube 7 is 10 mm.
As a preferred embodiment of the present invention, the four brass electrodes 6 are 18mm in length and 2mm in thickness.
As a preferred embodiment of the present invention, the length of the first circular copper guard ring 1 and the second circular copper guard ring 2 is 5mm, and the thickness is 2mm as the same as the thickness of the brass electrode 6.
As a preferred embodiment of the present invention, the brass metal shield 3 has an outer diameter of 16mm and a thickness of 1 mm. For shielding the brass electrode 6. The brass electrodes 6 of the cross-over capacitor are insulated from the outer brass metal shield 3 by means of a second teflon tube 7 of thickness 1 mm.
As shown in fig. 3, the high-precision cross capacitance oil detection sensor further includes a detection device, the detection device includes a base 8 and a bracket 9 fixedly connected to the base 8, and the bracket 9 is respectively provided with a first clamping device 10 and a second clamping device 11; the first clamping device 10 is connected with the high-precision cross capacitance oil detection sensor 12; the high-precision cross capacitance oil detection sensor 12 is electrically connected with an AD7150 capacitance digital converter 13 and a PC end 14; the second clamping device 11 is connected with a third Teflon tube 15, the third Teflon tube 15 passes through the center of the first Teflon tube 5, the top end of the third Teflon tube 5 is connected with a funnel 16, a container 17 is arranged right below the bottom end of the third Teflon tube 5, and a filter screen 18 is suspended between the container 17 and the third Teflon tube 15.
In a preferred embodiment of the present invention, the diameter of the third teflon tube 15 is smaller than the diameter of the first teflon tube 5.
The utility model also provides a fluid detection method based on high accuracy cross capacitance fluid detection sensor, this method utilizes high accuracy cross capacitance fluid detection sensor realize, including following step:
step S1, conveying the oil to be detected into a third Teflon tube 15 through a funnel 16;
step S2, when the oil to be detected flows through the cross capacitor, signal excitation is applied to the brass electrodes 6 opposite to the cross capacitor, and the cross capacitor generates different capacitance responses according to the difference of the quality, the size and the flow velocity of metal pollutants in the oil;
and step S3, measuring the capacitance value of the high-precision cross capacitance oil detection sensor by adopting the AD7150 capacitance digital converter 13, connecting the AD7150 capacitance digital converter 13 with the PC end 14, and carrying out online data acquisition by the PC end 14. The detected signal is shown in fig. 4.
In step S4, the detected oil flows into the tank 17 through the filter screen 18.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (8)
1. The utility model provides a high accuracy cross capacitance fluid detection sensor which characterized in that includes: the device comprises a cross capacitor, a first circular copper guard ring, a second circular copper guard ring, a brass metal protective cover and an electrode connector;
the cross capacitor comprises a first Teflon tube and four symmetrically arranged brass electrodes attached to the outer wall of the first Teflon tube, and the interval between any two brass electrodes is 0.5 mm;
the first circular copper guard ring is arranged at the upper end of the outer wall of the first Teflon tube, and the first circular copper guard ring is 0.5mm away from one end of the brass electrode; the second circular copper guard ring is arranged at the lower end of the outer wall of the first Teflon tube, and the second circular copper guard ring is spaced from the other end of the brass electrode by 0.5 mm;
the brass metal protective cover is arranged outside the cross capacitor, the interval between the brass metal protective cover and the cross capacitor is 1mm, and a second Teflon tube is arranged between the brass metal protective cover and the cross capacitor;
the electrode connector is connected with four identical brass electrodes.
2. A high accuracy cross capacitance oil detection sensor as claimed in claim 1 wherein said second teflon tube has a diameter greater than a diameter of said first teflon tube.
3. A high accuracy cross capacitance oil detection sensor as claimed in claim 1 wherein the four brass electrodes are each 18mm in length and 2mm in thickness.
4. The high accuracy cross capacitance oil detection sensor of claim 1, wherein the first and second circular copper grommets are both 5mm in length and 2mm in thickness, as are the brass electrodes.
5. A high accuracy cross capacitance oil detection sensor as claimed in claim 1 wherein the brass metal shield has an outer diameter of 16mm and a thickness of 1 mm.
6. The high accuracy cross-capacitance oil detection sensor of claim 1, wherein polytetrafluoroethylene is filled between any two brass electrodes.
7. The high-precision cross-capacitance oil detection sensor according to claim 1, further comprising a detection device, wherein the detection device comprises a base and a bracket fixedly connected to the base, and the bracket is provided with a first clamping device and a second clamping device respectively; the first clamping device is connected with the high-precision cross capacitance oil detection sensor; the high-precision cross capacitance oil detection sensor is electrically connected with the AD7150 capacitance digital converter and the PC end; the second clamping device is connected with a third Teflon tube, the third Teflon tube penetrates through the center of the first Teflon tube, the top end of the third Teflon tube is connected with the funnel, a container is arranged right below the bottom end of the third Teflon tube, and a filter screen is suspended between the container and the third Teflon tube.
8. The high accuracy cross-capacitance oil detection sensor of claim 7 wherein said third teflon tube has a diameter less than a diameter of said first teflon tube.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022002574.6U CN212622366U (en) | 2020-09-14 | 2020-09-14 | High-precision cross capacitance oil detection sensor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022002574.6U CN212622366U (en) | 2020-09-14 | 2020-09-14 | High-precision cross capacitance oil detection sensor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111982984A (en) * | 2020-09-14 | 2020-11-24 | 大连海事大学 | High-precision cross-capacitance oil detection sensor and detection method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111982984A (en) * | 2020-09-14 | 2020-11-24 | 大连海事大学 | High-precision cross-capacitance oil detection sensor and detection method thereof |
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