CN109855524A - A kind of cladding thickness measurer sensor - Google Patents
A kind of cladding thickness measurer sensor Download PDFInfo
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- CN109855524A CN109855524A CN201910289251.9A CN201910289251A CN109855524A CN 109855524 A CN109855524 A CN 109855524A CN 201910289251 A CN201910289251 A CN 201910289251A CN 109855524 A CN109855524 A CN 109855524A
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Abstract
The present invention relates to thickness measurement equipment sensor technical fields, specifically disclose a kind of cladding thickness measurer sensor, including magnetic core (2), skeleton (3), coil (4), inner housing (5)；The magnetic core (2) opens up hole in measurement end face, the magnetic core (2) is installed on the center of skeleton (3), the coil (4) is wound in the wire casing of skeleton (3), and the inner housing (5) is sleeved on skeleton (3) outside.The present invention opens up hole in magnetic core measurement end face, coating thickness on measurement magnetic metal matrix, when especially thin coating thickness, effectively increase the magnetic resistance that sensor flows into matrix, reduce magnetic flux, reduce the signal strength by magnetic induction end, keep this section measurement linear trend and other sections of measurement linear trends almost the same, i.e. near linear is linear, its measurement linearity curve for effectively having modified sensor, to realize in gamut scope arbitrarily by the quickly calibrated function of the two o'clock of Thickness Measurement by Microwave.
Description
Technical field
The present invention relates to thickness measurement equipment sensor technical fields, specifically disclose a kind of cladding thickness measurer sensor.
Background technique
The measurement method of coating thickness mainly has: wedge cutting method, light cut method, electrolysis method, thickness method of measurement, weight method, X and penetrate
Line fluorescence method, β ray backscattering method, capacitance method, Magnetism measurement and eddy current measurement method etc..First five kind is that have in these methods
Damage detection, measurement means are cumbersome, and speed is slow, are suitable for sampling inspection more.
To the measurement of material coating in actual life, it is gradually introduced microcomputer technology, using method of magnetic and eddy-current method
Calibrator develops to miniature, intelligent, multi-functional, high-precision, practical direction, the measurement experience sense of instrument by and service efficiency
Etc. having been to be concerned by more and more people.
When using method of magnetic principle, the big of the magnetic flux for flowing into ferromagnet substrate by non-ferromagnetic coating from sensor is utilized
It is small, to measure coating thickness.The size of corresponding magnetic resistance can also be measured, to indicate its coating thickness.Coating is thicker, then
Magnetic resistance is bigger, and magnetic flux is smaller.
When using eddy-current method principle, high frequency ac signal generates electromagnetic field in the sensor coil, and sensor is close to conductor
When, vortex is just formed wherein, and sensor is closer from conducting base, then is vortexed more greatly, and reflected umpedance is also bigger.This feedback is made
Dosage characterizes the size of distance between sensor and conducting base, that is, on conducting base non-conductive coating thickness it is big
It is small.
Currently, in the market most cladding thickness measurers be required to carry out when environment etc. changes multiple spot (it is general are as follows:
0,50,100,250,500,1000 totally 6 points) calibration guarantees the accuracy of its entire measurement range, especially magnetic metal base
Body (FE) measurement, check and punctuate are more, and measurement linearity curve bending cannot achieve in gamut scope arbitrarily by the two o'clock of Thickness Measurement by Microwave
It is quickly calibrated, cause user it is inconvenient for use, measurement experience sense by difference.
Core component of the magnetic core as sensor, permeance is very crucial, and the magnetic core of such sensor is usually height
The soft magnetic materials permalloy (also known as dilval) of magnetic conductivity makes, and has very high low-intensity magnetic field magnetic permeability, therefore, magnetic core is determined
The sensitivity and measurement accuracy of sensor are determined.
Existing sensor magnetic core measurement end face is generally the arcwall face or burnishing surface protruded, when measurement magnetic metal matrix
(FE) coating thickness on when especially thin coating thickness, since magnetic core approximation is directly contacted with metallic matrix, passes through sensing
The magnetic resistance that device flows into matrix is very small, and magnetic flux is very big, and the signal by magnetic induction to receiving end is very strong, and remolding sensitivity is surveyed
Measure it is high when other coat thickness, cause this section measurement linear trend inclination angle show very precipitous, and when measurement
When other thicker coating thicknesses, magnetic resistance is then relatively large, and magnetic flux is smaller, and the signal by magnetic induction to receiving end is weaker,
It measures linear trend inclination angle and shows to tend towards stability, and therefore, Trendline when sensor measurement difference coating thickness is different
It causes, the entire linear performance bending of measurement (for details, reference can be made to the measurement Linear Comparison figures in Fig. 5).
And need really to realize in gamut scope that, arbitrarily by the quickly calibrated function of the two o'clock of Thickness Measurement by Microwave, above-mentioned trend is linear
It is necessary for linearity or near linear.
In addition, the measurement accuracy of existing coat calibrator can also occur with the abrasion of the critical components such as sensor magnetic core
Change, be especially particularly acute when high frequency time uses for a long time, the abrasion of sensor magnetic core will lead to the change of instrument measurement precision
The shortening of difference and service life, to increase customer using cost.
Summary of the invention
In order to overcome shortcoming and defect existing in the prior art, the purpose of the present invention is to provide a kind of achievable full doses
Arbitrarily by the cladding thickness measurer sensor of the quickly calibrated function of the two o'clock of Thickness Measurement by Microwave within the scope of journey.
To achieve the above object, the present invention uses following scheme.
A kind of cladding thickness measurer sensor, including magnetic core 2, skeleton 3, coil 4, inner housing 5；The magnetic core 2 is in measurement end
Face opens up hole, and the magnetic core 2 is installed on the center of skeleton 3, and the coil 4 is wound in the wire casing of skeleton 3, the inner casing
Body 5 is sleeved on outside skeleton 3.
Preferably, the aperture of the measurement end face of magnetic core 2 is embedded with magnetic core filler 1.
Preferably, the measurement end face of magnetic core filler 1 and magnetic core 2, alternatively, magnetic core filler 1 protrudes from magnetic core 2
Measure end face.
Preferably, the material of magnetic core filler 1 is inorganic non-metallic material, plastic material or inorganic non-metallic material
With the composite material of plastic material.
It further, further include protection cap 6, protection cap 6 is installed on the limiting slot that inner housing 5 measures end face.
It preferably, further include top cover 7 and outer housing 9, outer housing 9 is fixed on outside inner housing 5, and top cover 7 is fixed on shell
9 top of body, is equipped with spring 8 between 5 top of inner housing and top cover 7.
Preferably, being connected between inner housing 5 and outer housing 9 by the spring 8, inner housing 5 when in use can be by spring 8
Ejection resets.
Preferably, magnetic core 2 is fixed or the adjustable center for being installed on skeleton 3.
It is inserted in addition, inner housing 5 is sleeved on outside skeleton 3 for coaxial assembly.
Compared with prior art, it the invention has the benefit that providing a kind of cladding thickness measurer sensor, is surveyed in its magnetic core
End face aperture is measured, due to having opened hole in magnetic core measurement end face, the coating thickness on measurement magnetic metal matrix is especially thin
When coating thickness, the magnetic resistance that sensor flows into matrix is effectively increased, magnetic flux is reduced, reduces the letter by magnetic induction end
Number intensity keeps this section measurement linear trend and other sections of measurement linear trends almost the same, i.e., near linear is linear, has
The measurement linearity curve of sensor is had modified to effect, to realize arbitrarily quickly calibrated by the two o'clock of Thickness Measurement by Microwave in gamut scope
Function.
Detailed description of the invention
Fig. 1 is the schematic diagram of the section structure of the sensor of the embodiment of the present invention.
Fig. 2 is the decomposition texture schematic diagram of the sensor of the embodiment of the present invention.
Fig. 3 is the schematic perspective view of the sensor of the embodiment of the present invention.
Fig. 4 is that the magnetic flux change comparison of the measurement end face of the aperture of sensor magnetic core with the not aperture of the embodiment of the present invention is shown
It is intended to.
Fig. 5 is the measurement Linear Comparison schematic diagram of the aperture of sensor magnetic core Yu the not aperture of the embodiment of the present invention.
Fig. 6 is the measurement data contrast schematic diagram of the aperture of sensor magnetic core Yu the not aperture of the embodiment of the present invention.
Specific embodiment
For the ease of the understanding of those skilled in the art, the present invention is made further below with reference to examples and drawings
Bright, the content that embodiment refers to not is limitation of the invention.
Core component of the sensor as entire cladding thickness measurer, and core element of the magnetic core as sensor, usually
It is directly contacted with measured surface, be easy to cause abrasion, declined so as to cause the measurement accuracy of calibrator；Therefore, in the prior art
In, technical staff generally understands emphasis and considers to improve wear intensity by the structure of magnetic core in change sensor or position, to mention
Rise measurement accuracy.
But rarely have technical staff to recognize the problem of measurement of sensor linearly exists, that is, in background of invention
Coating thickness of the existing sensor mentioned on measurement magnetic metal matrix, when especially thin coating thickness, due to magnetic core
Approximate directly to contact with measurement metallic matrix, the magnetic resistance for flowing into matrix by sensor is very small, and magnetic flux is very big, passes through magnetic strength
The signal that receiving end should be arrived is very strong, remolding sensitivity measure other coat thickness when it is high, cause this section measure line
Property Trendline inclination angle shows very precipitous, and when measuring other coating thicknesses, since magnetic resistance is relatively large, magnetic flux is smaller,
Signal by magnetic induction to receiving end is weaker, and measurement linear trend inclination angle shows to tend towards stability, therefore, sensor
Trendline when measuring different coating thicknesses is inconsistent, the entire linear performance bending of measurement, to cannot achieve gamut scope
The quickly calibrated function of interior any two o'clock by Thickness Measurement by Microwave.
And the present inventor is exactly under the test many times to different measurement objects, it was found that above-mentioned technical problem, and it is right
This carries out structure improvement, while having carried out data verification to its validity.
Above structure improves specifically, sensor of the invention measures end face aperture in magnetic core and loads magnetic core filler,
The purpose of its aperture is in order to correct the linear characteristic that sensor measures magnetic metal matrix (FE), by existing sensor measurement
Characteristic is nearly straight linear by curve amendment, for nonmagnetic metal matrix (NFE) then without influence (because of nonmagnetic metal matrix
Measuring principle is eddy current principle, is not needed through magnetic core, only need to generate vortex by coil, itself be exactly nearly straight line
Linearly), to realize arbitrarily quickly calibrated by the two o'clock of Thickness Measurement by Microwave in gamut scope.Meanwhile end face aperture is measured in magnetic core
Interior filling filler, its purpose is to reduce magnetic core measurement end in face of the damage of testee coating and the mill of magnetic core itself
Damage, it is ensured that the service life and measurement accuracy of sensor reduce customer using cost.The sensor meet simultaneously method of magnetic and
Eddy-current method measurement needs.
Those skilled in the art understand, and cladding thickness measurer sensor on the market generally uses magnetic core as detection at present
Component, magnetic core herein and the magnetic core being described herein refer both to the structural detail with magnetic conductance, therefore, even if title
Different (for example, referred to as probes) is still covered but as long as being the magnetic element for calibrator sensor measurement in institute of the present invention
Within how.
Specifically, a kind of cladding thickness measurer sensor is present embodiments provided, as shown in FIG. 1 to 3, sensor includes magnetic
Core 2, magnetic core 2 measure end face and are provided with hole；Preferably, in the aperture of 1 embedded magnetic core 2 of magnetic core filler measurement end face；Magnetic core 2 is installed
In the center of skeleton 3, coil 4 is wound in the wire casing of skeleton 3, and inner housing 5 is sleeved on outside skeleton 3, and protection cap 6 is assemblied in
Inner housing 5 measures in the limiting slot of end face, and top cover 7 is locked at 9 top of outer housing, lays between 5 top of inner housing and top cover 7
Spring 8, binding post 10 install (preferably, beer system) at 3 top of skeleton, and PCB 11 is welded among binding post 10, and outer housing 9 is fixed
In the outside of inner housing 5.
In addition, be to this explanation as shown in Figure 1, the measurement end face of the embodiment of the present invention is the arcwall face protruded slightly above,
The present inventor proves that the arcwall face or burnishing surface either protruded only need to measure end face aperture in magnetic core by experimental data,
The object of the invention can be achieved, obtain the measurement characteristic of nearly straight linear.Therefore, calibrator existing in market is sensed
Device, it is arcwall face or burnishing surface that no matter it, which measures end face, and the present invention is applicable；And without changing its internal structure, only
Need to be in measurement end face aperture, structure is simple but practical, significant effect.
End face aperture is measured in magnetic core 2, end face center is measured in the magnetic core using mechanical high-precision processing technology
Aperture, and a small amount of glue is injected in aperture, so as to embedded magnetic core filler.Magnetic core 2 measures end face aperture, can effectively change existing
There is the defect of the measurement poor linearity of cladding thickness measurer sensor, realizes arbitrarily quick by the two o'clock of Thickness Measurement by Microwave in gamut scope
Calibration.Concrete principle is as shown in figure 4, the present invention measures end face aperture in magnetic core, the thin coating on measurement magnetic metal matrix
When thickness, the magnetic resistance that sensor flows into matrix is effectively increased, magnetic flux is reduced, reduces strong by the signal at magnetic induction end
Degree keeps this section measurement linear trend and other sections of measurement linear trends almost the same, that is, near linear is linear；I.e. so that
Sensor can obtain the measurement characteristic of nearly straight linear when measuring magnetic matrix and non-magnetic matrix, and then realize gamut
Arbitrarily by the quickly calibrated function of the two o'clock of Thickness Measurement by Microwave in range.
The material of magnetic core filler 1 is preferably zirconium oxide (synthetic cut stone), by 1 embedded magnetic core of magnetic core filler, 2 measurement end
In aperture of the face with glue.It fills and presents the 1 tested coating of energy effective protection of magnetic core filler not to be destroyed, and prevents magnetic core 2 itself
Slow abrasion, the service life and measurement accuracy of sensor has been effectively ensured.The measurement end face of magnetic core filler 1 and magnetic core 2
The measurement end face for flushing or being slightly above (that is, protruding from) magnetic core, both may be implemented the object of the invention.
In addition, the material of magnetic core filler 1 can for inorganic non-metallic material, plastic material, inorganic non-metallic material with
The composite material etc. of plastic material.
Specifically, inorganic non-metallic material can be with are as follows: aluminium oxide, tungsten oxide, zirconium oxide, molybdenum oxide, titanium oxide, carbonization
One of materials such as tungsten, titanium carbide, molybdenum carbide, silicon carbide, boron nitride, titanium nitride.
And the making material of magnetic core 2 is preferably permeability magnetic material, permeability magnetic material include nickel iron-based alloy (also known as permalloy),
Super-microcrystalline soft magnetic alloy, amorphous soft magnetic alloy, soft magnetic ferrite, iron silicon aluminum series alloy, iron aluminum series alloy, iron Si system alloy,
Pure iron and mild steel etc.；The present embodiment, the material that magnetic core 2 uses are preferably permalloy.
Magnetic core 2 is installed on the center of skeleton 3, and mounting means can be divided to two kinds: fixed form and adjustable way；
The installation method of fixed form is to be pressed directly into the centre bore of skeleton 3 using hand hydraulic cutting presser, needs to adjust indentation before indentation
The limit value of depth, fixing assembling mode is easy and installation effectiveness is high；The installation method of adjustable way are as follows: in the non-of magnetic core 2
Measurement end opens up flat recess, and magnetic core 2 is threaded, to be screwed in the center of skeleton 3, screw-in depth can be adjusted
Section；The adjustable installation of magnetic core 2, is conducive to the position by adjusting magnetic core 2 to obtain optimal sensor performance.
Coil 4 is wound in the wire casing of skeleton 3, and dedicated coil winding machine coiling can be used, it is preferable that three groups of lines of coiling respectively
Circle, respectively 1000 circles, 550 circles, 20 circles (specific the number of turns is adjustable as needed).
Inner housing 5 is sleeved on outside skeleton 3, and inner housing 5 is sleeved on outside skeleton 3 to be inserted in for coaxial assembly, need to be in bone before being inserted in
The 3 a small amount of glue of surrounding point of frame is to fix inner housing 5.The making material of inner housing 5 can for metal material, permeability magnetic material, plastics,
Or the composite material of inorganic non-metallic material and plastic material.The effect of shell is to shield the dry of outer bound pair magnetic core position
It disturbs；The present embodiment, the material that inner housing 5 uses are preferably stainless iron.
Protection cap 6 is assemblied in inner housing 5 and measures in the limiting slot of end face, when protection cap 6 is assembled, first measures end face in skeleton
A small amount of glue is put in surrounding and the limiting slot of contact position and inner housing 5 the measurement end face of protection cap 6, then by protection cap 6
Inner housing 5 is pressed into measure in the limiting slot of end face.Protection cap 6 can use plastic material.The effect of protection cap 6 is to prevent ash
Dirt etc. enters sensor internal, coil is protected not to be damaged.The present embodiment, the material that protection cap 6 uses are preferably plastics.
Spring 8 is placed between 5 top of inner housing and top cover 7 and top cover 7 is locked at the top of outer housing 9, by inner casing
Body 5 is packed into the loose slot of outer housing 9, is then charged into spring 8, top cover 7 is finally screwed, by bullet between inner housing 5 and outer housing 9
Spring 8 connects, and inner housing 5 can be ejected when in use by spring 8 to be resetted.
The making material of outer housing 9 can be metal material, permeability magnetic material, plastics or inorganic non-metallic material and modeling
The composite material of glue material；The present embodiment, the material that outer housing 9 uses are preferably copper nickel plating.
The tap of coil 4 is connected with the binding post 10 for being mounted on 3 top of skeleton, and binding post 10 is connected with PCB 11, PCB
11 are connected to cladding thickness measurer host (not shown) with cable (not shown) again.
Present invention seek to address that existing cladding thickness measurer sensor measurement poor linearity, cannot achieve in entire range ability
Arbitrarily by the quickly calibrated function of the two o'clock of Thickness Measurement by Microwave, the verification experimental verification of people through the invention, from Fig. 5 sensor magnetic core aperture with not
The measurement Linear Comparison schematic diagram of aperture and the measurement linear data contrast schematic diagram of the aperture of Fig. 6 sensor magnetic core and not aperture can
To obtain, end face aperture is measured in sensor magnetic core, success effectively has modified the measurement linearity curve of sensor, realizes range
It is arbitrarily quickly calibrated by the two o'clock of Thickness Measurement by Microwave in range.Magnetic core filler is filled and presented in magnetic core measurement end-face hole, filler is wear-resisting
Anti-corrosion is effectively guaranteed the measurement accuracy and service life of cladding thickness measurer sensor, reduces customer using cost.
The sensor has been successfully applied in coat calibrator product, and it is completely newly different that user is also brought in practice
The measurement experience sense of sample by and long-term high frequency time use when stability, reliability and measurement accuracy.
The preferred embodiment of the present invention has shown and described in above description, as previously described, it should be understood that the present invention is not office
Be limited to form disclosed herein, should not be regarded as an exclusion of other examples, and can be used for various other combinations, modification and
Environment, and can be changed within that scope of the inventive concept describe herein by the above teachings or related fields of technology or knowledge
It is dynamic.And changes and modifications made by those skilled in the art do not depart from the spirit and scope of the present invention, then it all should be appended by the present invention
In scope of protection of the claims.
Claims (9)
1. a kind of cladding thickness measurer sensor, it is characterised in that: sensor includes magnetic core (2), skeleton (3), coil (4), inner casing
Body (5)；The magnetic core (2) opens up hole in measurement end face, and the magnetic core (2) is installed on the center of skeleton (3), the coil
(4) it is wound in the wire casing of skeleton (3), the inner housing (5) is sleeved on skeleton (3) outside.
2. cladding thickness measurer sensor according to claim 1, it is characterised in that: the aperture of the measurement end face of magnetic core (2)
It is embedded with magnetic core filler (1).
3. cladding thickness measurer sensor according to claim 2, it is characterised in that: magnetic core filler (1) and magnetic core (2)
End face is measured, alternatively, magnetic core filler (1) protrudes from the measurement end face of magnetic core (2).
4. cladding thickness measurer sensor according to claim 2, it is characterised in that: the material of magnetic core filler (1) is nothing
The composite material of machine nonmetallic materials, plastic material or inorganic non-metallic material and plastic material.
5. cladding thickness measurer sensor according to claim 1, it is characterised in that: further include protection cap (6), protection cap
(6) it is installed on the limiting slot of inner housing (5) measurement end face.
6. cladding thickness measurer sensor according to claim 1, it is characterised in that: further include top cover (7) and outer housing
(9), outer housing (9) is fixed on inner housing (5) outside, and top cover (7) is fixed at the top of outer housing (9), inner housing (5) top and top
Spring (8) are installed between lid (7).
7. cladding thickness measurer sensor according to claim 6, it is characterised in that: between inner housing (5) and outer housing (9)
It is connected by the spring (8), inner housing (5) can be ejected when in use by spring (8) to be resetted.
8. cladding thickness measurer sensor according to claim 1, it is characterised in that: magnetic core (2) is fixed or adjustable
Formula is installed on the center of skeleton (3).
9. cladding thickness measurer sensor according to claim 1, it is characterised in that: inner housing (5) is sleeved on skeleton (3) outside
It is inserted in coaxially to assemble.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910289251.9A CN109855524A (en) | 2019-04-11 | 2019-04-11 | A kind of cladding thickness measurer sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910289251.9A CN109855524A (en) | 2019-04-11 | 2019-04-11 | A kind of cladding thickness measurer sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109855524A true CN109855524A (en) | 2019-06-07 |
Family
ID=66903862
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| CN201910289251.9A Pending CN109855524A (en) | 2019-04-11 | 2019-04-11 | A kind of cladding thickness measurer sensor |
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| CN112924649A (en) * | 2021-03-17 | 2021-06-08 | 四川农业大学 | Landslide model horizontal acceleration amplification coefficient testing method |
| CN113109424A (en) * | 2021-04-13 | 2021-07-13 | 广州市果欧电子科技有限公司 | Steel structure weld joint detection method and detection system |
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