CN109813770A - A kind of condenser type ferromagnetism wear particle detection sensor and production method - Google Patents
A kind of condenser type ferromagnetism wear particle detection sensor and production method Download PDFInfo
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- CN109813770A CN109813770A CN201910194480.2A CN201910194480A CN109813770A CN 109813770 A CN109813770 A CN 109813770A CN 201910194480 A CN201910194480 A CN 201910194480A CN 109813770 A CN109813770 A CN 109813770A
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Abstract
The present invention provides a kind of condenser type ferromagnetism wear particle detection sensor and production method.Inventive sensor, comprising: magnetocapacitance detection unit and exciting unit；Magnetocapacitance detection unit includes the copper capacitor plate being arranged in PDMS substrate and hollow permanent magnet capacitor plate, copper capacitor plate is connected with hollow permanent magnet capacitor plate by insulated conductor, and condenser type ferromagnetism wear particle detection sensor connects exciting unit by insulated conductor.Copper capacitor plate includes the hollow copper post of annular and cylindricality solid copper pin, and hollow permanent magnet capacitor plate is annular hollow magnet；The hollow copper post of annular is arranged in PDMS substrate, and annular hollow magnet is discontiguous to be fixed on inside the hollow copper post of annular, and cylindricality solid copper pin is discontiguous to be fixed on inside annular hollow magnet.It is not high that technical solution of the present invention solves traditional capacitance detection sensitivity in the prior art, low efficiency, sensor detection abrasive grain authentic and valid in oil passage, the big problem of error.
Description
Technical field
The present invention relates to oil liquid detection technical fields, specifically, more particularly to a kind of condenser type ferromagnetism wear particle detection
Sensor and production method.
Background technique
Abrasion is to lead to all kinds of machinery equipment operation irregularities and one of the most common failure mode that fails, equipment internal friction
With the inevitable outcome of abrasion --- it is suspended in the wear particle in lubricating system oil liquid, is reflection equipment inter deterioration situation (journey
Degree, position and type) important information carrier.Occur more greatly wear particle in lubricating system and hydraulic system, it can be short
The badly damaged of equipment is caused in time, is set with the machinery of high-temperature work environment greatly especially for high speed, big load, vibration
It is standby.When equipment is abnormal abrasion, the concentration of abrasive grain can be dramatically increased in oil liquid, and partial size can sharply increase to 100 microns or more, such as
Hydraulic oil is replaced not in time, and partial size and concentration can all be gradually increased, will break down when reaching a certain level, lead to equipment
It stops working.
This patent replaces traditional capacitor plate on the basis of capacitance detecting method, using hollow permanent magnet, in same electricity
Multipair capacitor plate is formed in appearance, hollow permanent magnet generates the adsorptivity to ferromagnetism abrasive grain, increases to ferromagnetism abrasive grain
Detection sensitivity improves the efficiency of capacitance detecting.
Summary of the invention
According to traditional capacitance detection sensitivity set forth above, not high, low efficiency, sensor are authentic and valid in oil passage
Detection abrasive grain, the big technical problem of error, and a kind of condenser type ferromagnetism wear particle detection sensor and production method are provided.This
Invention replaces traditional capacitor plate on the basis of capacitance detecting method, using hollow permanent magnet, is formed on same capacitor more
To capacitor plate, hollow permanent magnet generates the adsorptivity to ferromagnetism abrasive grain, increases the detection sensitivity to ferromagnetism abrasive grain,
Improve the efficiency of capacitance detecting.
The technological means that the present invention uses is as follows:
A kind of condenser type ferromagnetism wear particle detection sensor, comprising: magnetocapacitance detection unit and exciting unit；The magnetoelectricity
Holding detection unit includes the copper capacitor plate being arranged in PDMS substrate and hollow permanent magnet capacitor plate, the copper capacitor plate
It is connected with hollow permanent magnet capacitor plate by insulated conductor, the condenser type ferromagnetism wear particle detection sensor is led by insulation
Line connects exciting unit.
Further, the copper capacitor plate includes the hollow copper post of annular and cylindricality solid copper pin, the hollow permanent magnet
Capacitor plate is annular hollow magnet；The hollow copper post of annular is arranged in PDMS substrate, and the annular hollow magnet does not connect
Touching is fixed on inside the hollow copper post of annular, and the cylindricality solid copper pin is discontiguous to be fixed on the annular hollow magnet
It is internal.
Further, annular 10-14 millimeters of the hollow copper pillar height, 14-16 millimeters of diameter, 1-2 millimeters of wall thickness.
Further, the annular hollow magnet is 9-13 millimeters high, and 8-10 millimeters of diameter, 1-2 millimeters of wall thickness.
Further, 10-14 millimeters of the cylindricality solid copper pillar height, 4-6 millimeters of diameter.
The present invention also provides a kind of production methods of condenser type ferromagnetism wear particle detection sensor, include the following steps:
Step 1: PDMS material is cast in it is 30-60 millimeters long, it is 20-40 millimeters wide, on high 10-20 millimeters of mold, give
It is taken out after solidifying 1 hour to 80 DEG C of oven heats, forms PDMS substrate；
Step 2: punching processing is carried out to above-mentioned PDMS substrate, the hollow copper post of the annular is arranged in PDMS substrate,
Hollow magnet is discontiguous is fixed on inside the hollow copper post of annular for the annular, and the cylindricality solid copper pin is discontiguous solid
It is scheduled on inside the annular hollow magnet；Gap between three is kept for 1-2 millimeters；
Step 3: insulated conductor one end being connected to any end of the annular hollow copper post and cylindricality solid copper pin, absolutely
The other end of edge conducting wire connects annular hollow magnet.
Further, the PDMS material is dimethyl silicone polymer or polymethyl methacrylate.
Compared with the prior art, the invention has the following advantages that
Condenser type ferromagnetism wear particle detection sensor provided by the invention, on the basis of capacitance detecting, by hollow permanent magnetism
Iron is applied in terms of capacitor oil liquid detection sensor, is increased the initiative of ferromagnetism wear particle detection, is increased capacitance detecting
Detection efficiency has better detection effect.
The present invention can be widely popularized in fields such as oil liquid detections based on the above reasons.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to do simply to introduce, it should be apparent that, the accompanying drawings in the following description is this hair
Bright some embodiments for those of ordinary skill in the art without any creative labor, can be with
It obtains other drawings based on these drawings.
Fig. 1 is inventive sensor structure chart.
Fig. 2 is magnetocapacitance detection unit structure chart of the present invention
Fig. 3 is magnetocapacitance detection unit side view of the present invention.
Fig. 4 is inventive sensor working principle diagram.
In figure: 1, PDMS substrate；2, the hollow copper post of annular；3, annular hollow magnet；4, cylindricality solid copper pin；5, capacitance pole
Electric field line between plate；6, exciting unit；7, magnetocapacitance detection unit.
Specific embodiment
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only
It is only a part of the embodiment of the present invention, instead of all the embodiments.It is real to the description of at least one exemplary embodiment below
It is merely illustrative on border, never as to the present invention and its application or any restrictions used.Based on the reality in the present invention
Example is applied, every other embodiment obtained by those of ordinary skill in the art without making creative efforts all belongs to
In the scope of protection of the invention.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to exemplary embodiments of the present invention.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
Unless specifically stated otherwise, positioned opposite, the digital table of the component and step that otherwise illustrate in these embodiments
It is not limited the scope of the invention up to formula and numerical value.Simultaneously, it should be clear that for ease of description, each portion shown in attached drawing
The size divided not is to draw according to actual proportionate relationship.Technology known for person of ordinary skill in the relevant, side
Method and equipment may be not discussed in detail, but in the appropriate case, and the technology, method and apparatus should be considered as authorizing explanation
A part of book.In shown here and discussion all examples, appointing should be construed as merely illustratively to occurrence, and
Not by way of limitation.Therefore, the other examples of exemplary embodiment can have different values.It should also be noted that similar label
Similar terms are indicated in following attached drawing with letter, therefore, once it is defined in a certain Xiang Yi attached drawing, then subsequent attached
It does not need that it is further discussed in figure.
As shown in Figure 1, the present invention provides a kind of condenser type ferromagnetism wear particle detection sensors, comprising: magnetocapacitance detection
Unit 7 and exciting unit 6；Magnetocapacitance detection unit 7 includes the copper capacitor plate and hollow permanent magnet being arranged in PDMS substrate 1
Capacitor plate, copper capacitor plate and hollow permanent magnet capacitor plate are connected by insulated conductor, condenser type ferromagnetism wear particle detection
Sensor connects exciting unit by insulated conductor.
As shown in Fig. 2, copper capacitor plate includes the hollow copper post 2 of annular and cylindricality solid copper pin 4, hollow permanent magnet capacitance pole
Plate is annular hollow magnet 3；The hollow copper post 2 of annular is arranged in PDMS substrate 1, and annular hollow magnet 3 is discontiguous to be fixed on
Inside the hollow copper post 2 of annular, cylindricality solid copper pin 4 is discontiguous to be fixed on inside annular hollow magnet 3.As shown in figure 3, when passing
It when sense device working, places it in oil liquid pipeline, when oil liquid flows through sensor, ferromagnetism abrasive grain meeting automatic absorbing is annular empty
3 surface of heart magnet, electric field line 5 can cause since the dielectric constant of oil liquid and metal worn particle is different between passing through capacitor plate
Capacitance instantaneous variation captures the information of abrasive grain according to the size of variable quantity.
As a preferred embodiment of the present invention, hollow 2 10-14 high millimeters of copper post of annular, 14-16 millimeters of diameter, wall thickness
1-2 millimeters.3 9-13 high millimeters of annular hollow magnet, 8-10 millimeters of diameter, 1-2 millimeters of wall thickness.Cylindricality solid copper pin 4 is 10-14 high
Millimeter, 4-6 millimeters of diameter.
The present invention also provides a kind of production methods of condenser type ferromagnetism wear particle detection sensor, include the following steps:
Step 1: PDMS material is cast in it is 30-60 millimeters long, it is 20-40 millimeters wide, on high 10-20 millimeters of mold, give
It is taken out after solidifying 1 hour to 80 DEG C of oven heats, forms PDMS substrate；
Step 2: punching processing is carried out to above-mentioned PDMS substrate, on the glass substrate by the hollow copper post setting of the annular,
Hollow magnet is discontiguous is fixed on inside the hollow copper post of annular for the annular, and the cylindricality solid copper pin is discontiguous solid
It is scheduled on inside the annular hollow magnet；Gap between three is kept for 1-2 millimeters；
Step 3: insulated conductor one end being connected to any end of the annular hollow copper post and cylindricality solid copper pin, absolutely
The other end of edge conducting wire connects annular hollow magnet.
The sensor made detects the ferromagnetic metal abrasive grain in oil liquid using capacitance detecting mode, and sensor is connected
It can be detected after to exciting unit.When the sensor detects abrasive grain, as shown in figure 3, ferromagnetic metal abrasive grain can actively be inhaled
It is attached to the surface of annular hollow magnet 3, during absorption, passes through electric field line 5 between capacitor plate, since oil liquid and metal are ground
The dielectric constant of grain is different, can cause capacitance instantaneous variation, and the information of abrasive grain is captured according to the size of variable quantity.
As a preferred embodiment of the present invention, the PDMS material in production method of the present invention be dimethyl silicone polymer or
Polymethyl methacrylate.
Technical solution of the present invention applies magnet in terms of capacitor oil liquid detection sensor on the basis of capacitance detecting,
The initiative for increasing ferromagnetism wear particle detection increases the detection efficiency of capacitance detecting, has better detection effect.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (7)
1. a kind of condenser type ferromagnetism wear particle detection sensor characterized by comprising magnetocapacitance detection unit and excitation are single
Member；The magnetocapacitance detection unit includes the copper capacitor plate and permanent magnet capacitor plate being arranged in PDMS substrate, the copper
Capacitor plate is connected with hollow permanent magnet capacitor plate by insulated conductor, and the condenser type ferromagnetism wear particle detection sensor is logical
Cross insulated conductor connection exciting unit.
2. condenser type ferromagnetism wear particle detection sensor according to claim 1, which is characterized in that the copper capacitor plate
Including the hollow copper post of annular and cylindricality solid copper pin, the hollow permanent magnet capacitor plate is annular hollow magnet；The annular
On the glass substrate, hollow magnet is discontiguous is fixed on inside the hollow copper post of annular for the annular for the setting of hollow copper post,
The cylindricality solid copper pin is discontiguous to be fixed on inside the annular hollow magnet.
3. condenser type ferromagnetism wear particle detection sensor according to claim 2, which is characterized in that the annular hollow copper
10-14 millimeters of pillar height, 14-16 millimeters of diameter, 1-2 millimeters of wall thickness.
4. condenser type ferromagnetism wear particle detection sensor according to claim 2, which is characterized in that the annular hollow magnetic
Iron is 9-13 millimeters high, and 8-10 millimeters of diameter, 1-2 millimeters of wall thickness.
5. condenser type ferromagnetism wear particle detection sensor according to claim 2, which is characterized in that the cylindricality solid copper
10-14 millimeters of pillar height, 4-6 millimeters of diameter.
6. a kind of production side of the condenser type ferromagnetism wear particle detection sensor as described in any claim of claim 1-5
Method, which comprises the steps of:
Step 1: PDMS material is cast in it is 30-60 millimeters long, it is 20-40 millimeters wide, on high 10-20 millimeters of mold, send to 80
DEG C oven heat takes out after solidifying 1 hour, forms PDMS substrate；
Step 2: punching processing is carried out to above-mentioned PDMS substrate, the hollow copper post of the annular is arranged in PDMS substrate, it is described
Annular hollow magnet is discontiguous to be fixed on inside the hollow copper post of annular, and the cylindricality solid copper pin is discontiguous to be fixed on
Inside the annular hollow magnet；Gap between three is kept for 1-2 millimeters；
Step 3: insulated conductor one end being connected to any end of the annular hollow copper post and cylindricality solid copper pin, insulation is led
The other end of line connects annular hollow magnet.
7. the production method of condenser type ferromagnetism wear particle detection sensor according to claim 6, which is characterized in that described
PDMS material is dimethyl silicone polymer or polymethyl methacrylate.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910194480.2A CN109813770A (en) | 2019-03-14 | 2019-03-14 | A kind of condenser type ferromagnetism wear particle detection sensor and production method |
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| CN201910194480.2A CN109813770A (en) | 2019-03-14 | 2019-03-14 | A kind of condenser type ferromagnetism wear particle detection sensor and production method |
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Cited By (1)
| 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 |
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| 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 |
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Application publication date: 20190528 |