CN206311670U - Dielectric material measurement apparatus - Google Patents
Dielectric material measurement apparatus Download PDFInfo
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- CN206311670U CN206311670U CN201621418571.8U CN201621418571U CN206311670U CN 206311670 U CN206311670 U CN 206311670U CN 201621418571 U CN201621418571 U CN 201621418571U CN 206311670 U CN206311670 U CN 206311670U
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Abstract
The utility model discloses a kind of dielectric material measurement apparatus,Including dielectric material measuring piece and short-circuit calibrating device,The dielectric material measuring piece includes the first inner wire and the first outer conductor,First outer conductor is sheathed on outside first inner wire,First outer conductor is connected with first inner wire,First inner wire is used to be connected with measuring circuit with one end of first outer conductor,The short-circuit calibrating device includes short board,Second inner wire and the second outer conductor,Second outer conductor is sheathed on outside second inner wire,Second inner wire,One end of second outer conductor is connected with the short board,When the dielectric constant of dielectric material is measured,Dielectric material measurement apparatus can be according to the size of dielectric material,Adjust its connected mode with dielectric material,Dielectric material measurement apparatus can be tested in the case where destruction treatment is not carried out to dielectric material,Applicability is good.
Description
Technical field
The utility model is related to a kind of measurement apparatus, more particularly to a kind of dielectric material measurement apparatus.
Background technology
Dielectric material is the common used material in radio-frequency unit and radio frequency class product, and PCB substrate, antenna protection should be made extensively
Cover, the resonator tuning many aspects such as part, and the electromagnetic property of dielectric material is used as one of the key property of dielectric material, it is right
The application of dielectric material has important influence.
Dielectric constant is generally available to represent the electromagnetic property of dielectric material, therefore the measurement of dielectric constant is dielectric material
The important component of parameter measurement, the device in existing test method is influenceed by environment, and its own parameter cannot be true
It is fixed, test data is there is error, it is impossible to obtain the accurate dielectric constant of dielectric material, simultaneously because existing dielectric material is surveyed
Amount part is required to the size of dielectric material, it is necessary to carry out destructive processing to dielectric material, is unfavorable for studying dielectric material
Overall performance.
The content of the invention
Based on this, the utility model is to overcome the deficiencies in the prior art, there is provided a kind of good dielectric material of applicability is surveyed
Amount device.
Its technical scheme is as follows：
A kind of dielectric material measurement apparatus, including dielectric material measuring piece and short-circuit calibrating device, the dielectric material measurement
Part includes the first inner wire and the first outer conductor, and first outer conductor is sheathed on outside first inner wire, outside described first
Conductor is connected with first inner wire, and first inner wire is used to connect with measuring circuit with one end of first outer conductor
Connect, the short-circuit calibrating device includes short board, the second inner wire and the second outer conductor, second outer conductor is sheathed on described the
Outside two inner wires, second inner wire, one end of second outer conductor are connected with the short board, when measurement dielectric material
Dielectric constant when, if dielectric material size more than the outer conductor of dielectric material measuring piece first internal diameter, in described first
Conductor and the end face of the first outer conductor other end are used to setting dielectric material；If dielectric material size is less than dielectric material
The internal diameter of the outer conductor of measuring piece first, first outer conductor is sheathed on the dielectric material, the first outer conductor other end
It is connected with the second outer conductor other end, the first inner wire other end matches somebody with somebody co-clip with the other end of second inner wire
Hold the dielectric material.
Wherein in one embodiment, first inner wire includes the first fixed part and the first abutting part, described first
Outer conductor is connected with first fixed part, and first fixed part is connected with first abutting part by elastic component, described
Thin multi-diameter shaft after first fixed part is thick before being, first abutting part is provided with the coordinated with the butt end of first fixed part
One stopper slot, the bottom surface of first stopper slot is provided with the second stopper slot coordinated with the taper end of first fixed part, first
The internal diameter of stopper slot more than second stopper slot internal diameter, one end of the elastic component located at first stopper slot with it is described
The junction of the second stopper slot, at the shaft shoulder of first fixed part, described first abuts the other end of the elastic component
Portion sets the dielectric material surface away from the end face of one end of first fixed part for supporting.
Wherein in one embodiment, first abutting part be cylinder, the external diameter of first abutting part with it is described
The equal diameters of the second inner wire, first outer conductor is circular sleeve, first outer conductor and second outer conductor
Internal diameter it is equal, first inner wire is coaxially disposed with first outer conductor.
Wherein in one embodiment, the outer rim of second outer conductor is provided with extension, and the extension is to away from institute
The direction for stating short board extends, and first outer conductor is provided with external screw thread near the outer surface of one end of the dielectric material, institute
State extension and be provided with the internal thread coordinated with the external screw thread, first outer conductor is matched somebody with somebody with second outer conductor by screw thread
Close connection.
Wherein in one embodiment, the short-circuit calibrating device is at least three, when the calibration dielectric material measuring piece
When, the second outer conductor of short-circuit calibrating device described at least three connects with the first outer conductor of the dielectric material measuring piece respectively
Connect, the second inner wire of short-circuit calibrating device described at least three respectively with the first inner wire pair of the dielectric material measuring piece
Connect, the axial length of second inner wire is more than or equal to 0, the axle of the second inner wire of short-circuit calibrating device described at least three
Unequal to length, second inner wire is coaxially disposed with second outer conductor.
Wherein in one embodiment, second inner wire is cylinder, and second outer conductor is described to be sheathed on
Circular casing outside second inner wire.
Wherein in one embodiment, the end face of second inner wire and second outer conductor away from the short board
It is generally aligned in the same plane.
Wherein in one embodiment, the side of the short board both sides is close described each parallel to second inner wire
The end face of dielectric material measuring piece.
Wherein in one embodiment, second inner wire is supported including the second fixed part and second and sets portion, described second
Fixed part is cylinder with described second to the portion of setting, and second fixed part is provided with and supports the cooperation that the portion of setting coordinates with described second
Groove, described second supports and sets portion part and stretch into the mating groove, and described second supports the portion of setting is arranged with spring, one end of the spring and
Described second is connected to the portion's of setting connection, the other end of the spring with the inwall of the mating groove.
Wherein in one embodiment, the short-circuit calibrating device is three, the second of one of them short-circuit calibrating device
The axial length of inner wire and the second outer conductor is 0.
The advantage or principle to preceding solution are illustrated below：
Above-mentioned dielectric material measurement apparatus, when the dielectric constant of dielectric material is measured, by outside the first inner wire and first
One end of conductor is electrically connected with measuring circuit, when internal diameter of the dielectric material size more than the first outer conductor, can directly by the
One end of one outer conductor and the first inner wire is supported and is located at dielectric material surface；If the size of dielectric material is less than the first outer conductor
Internal diameter when, the first inner wire and the second inner wire are supported located at the two ends of dielectric material respectively, and the first outer conductor is sheathed on medium
Material, while the first outer conductor is connected with the second outer conductor, the dielectric constant of dielectric material is obtained by survey calculation, is above given an account of
Material measurement apparatus can determine dielectric material connection different from dielectric material measuring piece according to the different size of dielectric material
Mode, realizes on the basis of destructive treatment is not carried out to dielectric material, the dielectric constant to dielectric material is measured, because
This is applicable to different dielectric materials, therefore applicability is preferable.
Brief description of the drawings
Fig. 1 is a kind of connected mode schematic diagram of dielectric material measurement apparatus and dielectric material；
Fig. 2 is another connected mode schematic diagram of dielectric material measurement apparatus and dielectric material；
Fig. 3 is the connection diagram of dielectric material measuring piece and short-circuit calibrating device 220a；
Fig. 4 is the connection diagram of dielectric material measuring piece and short-circuit calibrating device 220b；
Fig. 5 is the connection diagram of dielectric material measuring piece and short-circuit calibrating device 220c；
Fig. 6 is the network signal flow graph that dielectric material measurement apparatus are connected with dielectric material；
Fig. 7 is the equivalent circuit diagram that dielectric material measuring piece is connected with short-circuit calibrating device.
Description of reference numerals：
100th, dielectric material measuring piece, the 110, first inner wire, the 111, first fixed part, the 112, first abutting part, 112a,
First stopper slot, 112b, the second stopper slot, the 120, first outer conductor, 200, short-circuit calibrating device, the 210, second inner wire, 220,
Second outer conductor, 221, extension, 230, short board, 200a, short-circuit calibrating device, 200b, short-circuit calibrating device, 200c, short-circuit school
Quasi- part, 300, dielectric material.
Specific embodiment
Embodiment of the present utility model is described in detail below in conjunction with the accompanying drawings.
As shown in Figures 1 and 2, dielectric material measurement apparatus include dielectric material measuring piece 100 and short-circuit calibrating device 200,
Dielectric material measuring piece 100 includes the first inner wire 110 and the first outer conductor 120, and the first outer conductor 120 is sheathed in first and leads
Outside body 110, the first outer conductor 120 is connected with the first inner wire 110, and one end of the first inner wire 110 and the first outer conductor 120 is used
It is connected in measuring circuit, short-circuit calibrating device 200 includes short board 230, the second inner wire 210 and the second outer conductor 220, second
Outer conductor 220 is sheathed on outside the second inner wire 210, and the second inner wire 210, one end of the second outer conductor 220 and short board 230 connect
Connect, when the dielectric constant of dielectric material 300 is measured, if the size of dielectric material 300 is more than the of dielectric material measuring piece 100
The end face of the internal diameter of one outer conductor 120, the first inner wire 110 and the other end of the first outer conductor 120 is used to setting dielectric material
300；If the size of dielectric material 300 is less than the internal diameter of the first outer conductor 120 of dielectric material measuring piece, the first outer conductor 120
Dielectric material is sheathed on, the other end of the first outer conductor 120 is connected with the other end of the second outer conductor 220, the first inner wire 110
The other end of the other end and the second inner wire 210 coordinates clamping medium material 300.Above-mentioned dielectric material measurement apparatus, in measurement
It is first that the first inner wire 110 is electrical with measuring circuit with one end of the first outer conductor 120 during the dielectric constant of dielectric material 300
Connection, when internal diameter of the size of dielectric material 300 more than the first outer conductor 120, can directly by the first outer conductor 120 and first
One end of conductor 110 is supported and is located at the surface of dielectric material 300；If the size of dielectric material 300 is interior less than the first outer conductor 120
During footpath, the first inner wire 110 and the second inner wire 210 are supported located at the two ends of dielectric material 300, the first 120 sets of outer conductor respectively
Located at dielectric material 300, while the first outer conductor 120 is connected with the second outer conductor 220, then by the first outer conductor 120 and first
Inner wire 110 is connected away from one end of dielectric material with measuring circuit, and the dielectric for obtaining dielectric material 300 by survey calculation is normal
Number, above-mentioned dielectric material measurement apparatus can determine that dielectric material 300 is surveyed with dielectric material according to the different size of dielectric material 300
The different connected modes of part 100 are measured, is realized on the basis of destructive treatment is not carried out to dielectric material 300, to dielectric material
300 dielectric constant is measured, therefore is applicable to different dielectric materials, therefore applicability is preferable.
The dielectric constant of above-mentioned dielectric material measurement apparatus measurement dielectric material 300 is comprised the following steps：
If as shown in figure 1, the size of dielectric material 300 less than the outer conductor 120 of dielectric material measuring piece 100 first internal diameter,
First outer conductor 120 of dielectric material measuring piece 100 is connected with the second outer conductor 220 of short-circuit calibrating device 200, dielectric material
First inner wire 110 of measuring piece 100, the second inner wire 210 of short-circuit calibrating device 200 are supported located at dielectric material 300 respectively
Two sides；If as shown in Fig. 2 the size of dielectric material 300 more than the outer conductor 120 of dielectric material measuring piece 100 first internal diameter,
First inner wire 110 and the first outer conductor 120 of dielectric material measuring piece 100 are supported located at the same side of dielectric material 300
Measuring circuit is accessed in face, one end by dielectric material measuring piece 100 away from dielectric material 300, obtains corresponding with dielectric material 300
Measuring circuit input reflectance factor Sdut, according to microwave network theory, the reflectance factor G of dielectric material 300dutFor：
Gdut=(S1-Sdut)/(S1S2-Sc-S2Sdut)；
As shown in fig. 7, equivalent after being sequentially connected according to measuring circuit, dielectric material measuring piece 100 and dielectric material 300
Circuit and microwave network theory, obtain the reflectance factor G that the equivalent admittance y=y (ω, ε r) in equivalent circuit causesyFor
Gy=(1-y)/(1+y), wherein
Y=y (ω, εr)=G0Z0εr 5/2+jωZ0(εrC0+Cf)；
Using GyRelation with y makes GyWith εrDatabase, make Gy=Gdut, with GyCorresponding εrIt is dielectric material 300 to be worth
Dielectric constant,
ε is removed in above-mentioned formularOuter parameters can be obtained by theoretical calculation or experiment measurement, therefore can be as
The network parameter S of the amount of knowing, wherein dielectric material measuring piece 1001、S2And ScCan be calibrated by dielectric material measuring piece 100
Obtain.
As shown in figure 1, the first inner wire 110 includes the first fixed part 111 and the first abutting part 112, the first outer conductor 120
It is connected with the first fixed part 111, the first fixed part 111 is connected with the first abutting part 112 by elastic component, the first fixed part 111
It is preceding thick rear thin multi-diameter shaft, the first abutting part 112 is provided with the first stopper slot coordinated with the butt end of the first fixed part 111
The bottom surface of 112a, the first stopper slot 112a is provided with the second stopper slot 112b coordinated with the taper end of the first fixed part 111, the first limit
The internal diameter of the internal diameter more than the second stopper slot 112b of position groove 112a, one end of elastic component limits located at the first stopper slot 112a with second
The junction of position groove 112b, at the shaft shoulder of the first fixed part 111, the first abutting part 112 is away from for the other end of elastic component
The end face of one end of one fixed part 111 sets the surface of dielectric material 300 for supporting.Relative first fixed part 111 of first abutting part 112
Movably, and moving direction is consistent along the direction that the first stopper slot 112a, the second stopper slot 112b are slided with the first fixed part 111,
Therefore first when supporting that relative first fixed part 111 in the portion that sets is movable to make dielectric material measuring piece 100 be connected with short circuit calibrating device 200,
Can ensure that the first inner wire 110 is connected with the second inner wire 210, the first outer conductor 120 also connects simultaneously with the second outer conductor 220
Connect, now dielectric material measuring piece 100 can form loop with the connection of short-circuit calibrating device 200, by measuring circuit input
Reflectance factor obtains the network parameter of dielectric material measuring piece 100, and utilizes dielectric material measuring piece 100 to dielectric material
When 300 dielectric constant is measured, the first inner wire 110 and the second inner wire 210 coordinate clamping medium material 300, now
First inner wire 110 can be according to the thickness automatic adjusting position of dielectric material 300, simultaneously because the first fixed part 111 is along first
Stopper slot 112a, the second stopper slot 112b are slided, during clamping medium material 300 first inner wire 110 and the first outer conductor 120 it
Between distance keep it is constant, the parameters such as the electric capacity of dielectric material measuring piece 100 will not be changed, in the same of clamping medium material 300
When, make the first outer conductor 120 with the second outer conductor 220 while being connected, it is ensured that dielectric material measuring piece 100, dielectric material 300 with
The connection of short-circuit calibrating device 200 can form loop, and the dielectric constant of dielectric material 300 is obtained by data measured.
In the present embodiment, elastic component is spring, and spring housing is located at the first fixed part 111, and one end of spring is against first
At the shaft shoulder that the butt end of fixed part 111 is connected with taper end.
In the present embodiment, the first inner wire 110 of dielectric material measuring piece 100 includes the first fixed part 111 and first
To the portion that sets, the first fixed part 111 relative first supports the portion of setting movably, and moving direction and the first fixed part 111 are along the first stopper slot
The direction that 112a, the second stopper slot 112b are slided is consistent, and the second inner wire 210 is solid cylinder, but the second inner wire 210
The second fixed part and second be may include to portion is set, the second fixed part is connected with short board 230, second supports the portion that sets consolidates relative to second
Determine portion movably to connect, while second supports and sets portion and moved along own axes direction, can according to the thickness of dielectric material 300 adjust its with
Connection between first inner wire 110.
As shown in figure 1, in the present embodiment, the outer rim of the second outer conductor 220 is provided with extension 221, and extension 221 is to remote
Extend from the direction of short board 230, the first outer conductor 120 is provided with external screw thread near the outer surface of one end of dielectric material 300, prolongs
Extending portion 221 is provided with the internal thread coordinated with external screw thread, and the first outer conductor 120 and the second outer conductor 220 are connected by screw thread.
When the external screw thread of the first outer conductor 120 is connected with the screw-internal thread fit of the second outer conductor 220, outside the first outer conductor 120 and second
The end contact of the end contact of conductor 220, the first inner wire 110 and the second inner wire 210 or respectively clamping medium material 300
Two sides, measuring circuit is measured test data, network parameter or medium for obtaining dielectric material measuring piece 100
The dielectric constant of material 300.In addition dielectric material measuring piece 100 can also be connected by other means with short-circuit calibrating device 200, example
As the outer surface of dielectric material measuring piece 100 is provided with groove, the outer surface of short-circuit calibrating device 200 is provided with to be consolidated with groove fit
Fixed button, clip can be buckled into groove, dielectric material measuring piece 100 is connected and is buckled with short-circuit calibrating device 200.
As shown in Fig. 3, Fig. 4 and Fig. 5, short-circuit calibrating device 200 is at least three, is situated between using the measurement of dielectric material measuring piece
Before the dielectric constant of material, dielectric material measuring piece, the second outer conductor of at least three short-circuit calibrating devices 200 need to be first calibrated
220 are connected with the first outer conductor 120 of dielectric material measuring piece 100 respectively, at least three short-circuit calibrating devices 200 second in lead
Body 210 is docked with the first inner wire 110 of dielectric material measuring piece 100 respectively, the axial length of the second inner wire 210 be more than or
Axial length equal to the second inner wire 210 of 0, at least three short-circuit calibrating device 200 is unequal, the second inner wire 210 with
Second outer conductor 220 is coaxially disposed.Above-mentioned short-circuit calibrating device 200 passes through the second outer conductor 220, the second inner wire 210 and medium
Materials Measurement part 100 coordinates, and forms loop, can measure the anti-of multiple measuring circuit inputs corresponding with short-circuit calibrating device 200
Coefficient is penetrated, then the network parameter of dielectric material measuring piece 100 is obtained by processing above-mentioned reflectance factor, the network ginseng for now obtaining
Number is the network parameter under the present circumstances of dielectric material measuring piece 100 for dielectric material measuring piece 100, because dielectric material is surveyed
The network parameter for measuring part 100 can be changed with experimental enviroment, and the theoretical network compared to dielectric material measuring piece 100 is joined
Number, when the dielectric constant subsequently to dielectric material 300 is measured, more accurate medium can be drawn using above-mentioned network parameter
The dielectric constant of material 300.
In the present embodiment, before the dielectric constant to dielectric material 300 is measured, need first to dielectric material measuring piece
100 are calibrated, and measure the network parameter S of dielectric material measuring piece 1001、S2And Sc, using at least three short-circuit calibrating devices 200
It is to the method that dielectric material measuring piece is calibrated：
One end of dielectric material measuring piece 100 is connected with least three short-circuit calibrating devices 200 respectively, at least three short circuits
The axial length of calibrating device 200 is differed, and the other end of dielectric material measuring piece 100 is accessed into measuring circuit, obtain with often
Individual short-circuit calibrating device 200 distinguishes the reflectance factor S of corresponding measuring circuit inputmi(i=1~N, N >=3)；
By theoretical calculation or obtain at least three short-circuit calibrating devices 200 using electromagnetic simulation software and distinguish corresponding reflection
Coefficient Gi(i=1~N, N >=3) simultaneously distinguish the reflection system of corresponding measuring circuit input with least three short-circuit calibrating devices 200
Number Smi(i=1~N, N >=3) combine and set up equation group, the network signal flow graph according to Fig. 6 is obtained：
Smi=S1+ScGi/(1-S2Gi), (i=1~N, N >=3)；
Any three equations in equation group are combined and is solved, obtain corresponding network parameter S1t、S2tAnd Sct(N >=3), then equation group can obtainThe network parameter of group dielectric material measuring piece 100：
Using the matrix of the above-mentioned network parameter of Least Square in Processing, the network parameter of dielectric material measuring piece 100 is obtained
S1、S2And Sc。
In the present embodiment, short-circuit calibrating device 200 is three, as shown in Fig. 3, Fig. 4 and Fig. 5, short-circuit calibrating device 200a,
Second inner wire 210 of 200b and 200c is equal with the axial length L of the second outer conductor 320, and short-circuit calibrating device 200a, 200b
And the axial length L of second inner wire 210 of 200c increases successively, the axial direction of the second inner wire 210 and the second outer conductor 220 is long
The equal network parameter for making short-circuit calibrating device 200 calibrate dielectric material measuring piece 100 of degree is more accurate.
In the present embodiment, N=3, therefore can obtain：
Sm1=S1+ScG1/(1-S2G1),
Sm2=S1+ScG2/(1-S2G2),
Sm3=S1+ScG3/(1-S2G3)；
Above-mentioned equation group is solved,
S1=t1/t2,
S2=t3/t4,
Sc=t5/t6, wherein,
t1=(G1-G2)(G1-G3)(G2-G3)(Sm1-Sm2)(Sm1-Sm3)(Sm2-Sm3),
t2=(G2G3)(Sm2-Sm3)+G1(G2(Sm1-Sm2)+G3(Sm3-Sm1)))2,
t3=G1G3Sm1Sm2+G2G3Sm1Sm2+G1G2Sm1Sm3-G2G3Sm1Sm3
-G1G2Sm2Sm3+G1G3Sm2Sm3,
t4=G1G2Sm1-G1G3Sm1-G1G2Sm2+G2G3Sm2+G1G3Sm3-G2G3Sm3,
t5=G2Sm1-G3Sm1-G1Sm2+G3Sm2+G1Sm3-G2Sm3,
t6=G1G2Sm1-G1G3Sm1-G1G2Sm2+G2G3Sm3+G1G3Sm3-G2G3Sm3,
Obtain the network parameter S of dielectric material measuring piece 1001、S2And Sc。
Second inner wire 210 is cylinder, and the second outer conductor 220 is the circular casing being sheathed on outside the second inner wire 210,
Second inner wire 210 is coaxially disposed with the second outer conductor 220, while the second inner wire 210 and the second outer conductor 220 are away from short circuit
The end face of plate 230 is generally aligned in the same plane, and the side of the both sides of short board 230 is close to dielectric material each parallel to the second inner wire 220
The end face of measuring piece.When short-circuit calibrating device is according to above-mentioned setting, the distance between the second inner wire 210 and the second outer conductor 220
It is equal, at the same after being connected with dielectric material measuring piece 100 second inner wire 210, the second outer conductor 220 and short board 230 end
Face is parallel, makes short-circuit calibrating device more accurate to the result of the calibration of dielectric material measuring piece 100.
As shown in figure 1, in the present embodiment, for coordinating the short of clamping medium material 300 with dielectric material measuring piece 100
Road calibrating device 200, the axial length of its outer conductor 220 of the second inner wire 210 and second is 0, now short-circuit calibrating device 200
Short board 230 coordinates clamping medium material with dielectric material measuring piece 100, the short-circuit calibrating device relative to axial length more than 0
200, axial length is the 0 reflection system of dielectric material 300 that measures of the co-ordination medium Materials Measurement part 100 of short-circuit calibrating device 200
Number is relatively accurate, can obtain the dielectric constant of more accurate dielectric material 300 in follow-up calculating, but can also be more than axial length
0 short-circuit calibrating device 200 and the reflectance factor of the conjunction measuring dielectric material 300 of dielectric material measuring piece 100, and using multiple axles
It is different to length L but to be all higher than 0 short-circuit calibrating device 200 anti-with the conjunction measuring dielectric material 300 of dielectric material measuring piece 100
Coefficient is penetrated, the reflectance factor of the dielectric material 300 measured by the short-circuit calibrating device 200 to axially different length is processed,
Obtain the reflectance factor of more accurately dielectric material 300.
Second inner wire 210 includes the second fixed part and second to portion is set, and the second fixed part and second are circle to the portion of setting
Cylinder, the second fixed part is provided with and supports the mating groove that the portion of setting coordinates with second, and second supports and set portion part and stretch into mating groove, and second supports and set
Portion is arranged with spring, and one end of spring is connected with second to the portion of setting, and the other end of spring is connected with the inwall of mating groove.Second supports
If portion is movable with respect to the second fixed part, and second supports the portion that sets along mating groove slip, is calibrated when to dielectric material measuring piece 100
During operation, second supports the portion that sets relative second fixes movable, it can be ensured that second supports the portion of setting supports and be located at the of dielectric material measuring piece 100
During one inner wire 110, the end face of the second outer conductor 220 also can be with the end face of the first outer conductor 120 of dielectric material measuring piece 100
Connection, short-circuit calibrating device 200 is carried out calibration operation to dielectric material measurement apparatus, when second support the portion of setting support be located at medium material
During the surface of material 300, according to the thickness of dielectric material 300, second can adjust its position with the second fixed part to the portion of setting, it is ensured that
Second supports and sets portion and can be matched for clamping tightly dielectric material 300 with dielectric material measuring piece 100, makes dielectric material measuring piece 100 to medium
The measurement of the dielectric constant of material 300 is more accurate.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope of this specification record is all considered to be.
Embodiment described above only expresses several embodiments of the present utility model, and its description is more specific and detailed,
But therefore can not be interpreted as the limitation to utility model patent scope.It should be pointed out that for the common skill of this area
For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to
Protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be determined by the appended claims.
Claims (10)
1. a kind of dielectric material measurement apparatus, it is characterised in that including dielectric material measuring piece and short-circuit calibrating device, the medium
Materials Measurement part includes the first inner wire and the first outer conductor, and first outer conductor is sheathed on outside first inner wire, institute
State the first outer conductor to be connected with first inner wire, first inner wire is used for and survey with one end of first outer conductor
Amount circuit connection, the short-circuit calibrating device includes short board, the second inner wire and the second outer conductor, and second outer conductor is arranged
In outside second inner wire, second inner wire, one end of second outer conductor are connected with the short board, work as measurement
During the dielectric constant of dielectric material, if dielectric material size is more than the internal diameter of the outer conductor of dielectric material measuring piece first, institute
The first inner wire and the end face of the first outer conductor other end is stated to be used to setting dielectric material；If dielectric material size is less than
The internal diameter of the outer conductor of dielectric material measuring piece first, first outer conductor is sheathed on outside the dielectric material, described first and leads
The body other end is connected with the second outer conductor other end, and the first inner wire other end is another with second inner wire
End coordinates the clamping dielectric material.
2. dielectric material measurement apparatus according to claim 1, it is characterised in that first inner wire includes that first consolidates
Determine portion and the first abutting part, first outer conductor is connected with first fixed part, first fixed part and described first
Abutting part is connected by elastic component, and thin multi-diameter shaft after first fixed part is thick before being, first abutting part is provided with and institute
The first stopper slot that the butt end of the first fixed part coordinates is stated, the bottom surface of first stopper slot is provided with and first fixed part
The second stopper slot that taper end coordinates, the internal diameter of the internal diameter more than second stopper slot of the first stopper slot, the one of the elastic component
End is located at the junction of first stopper slot and second stopper slot, and the other end of the elastic component is consolidated located at described first
Determine at the shaft shoulder in portion, first abutting part sets the dielectric material away from the end face of one end of first fixed part for supporting
Surface.
3. dielectric material measurement apparatus according to claim 2, it is characterised in that first abutting part is cylinder,
The equal diameters of the external diameter of first abutting part and second inner wire, first outer conductor is circular sleeve, described
First outer conductor is equal with the internal diameter of second outer conductor, and first inner wire is coaxially disposed with first outer conductor.
4. dielectric material measurement apparatus according to claim 3, it is characterised in that the outer rim of second outer conductor is provided with
Extension, the extension extends to the direction away from the short board, and first outer conductor is near the dielectric material
The outer surface of one end is provided with external screw thread, and the extension is provided with the internal thread coordinated with the external screw thread, first outer conductor
It is connected by screw thread with second outer conductor.
5. dielectric material measurement apparatus according to claim 4, it is characterised in that the short-circuit calibrating device is at least three
It is individual, when the dielectric material measuring piece is calibrated, the second outer conductor of short-circuit calibrating device described at least three respectively with given an account of
The first outer conductor connection of material measuring piece, the second inner wire of short-circuit calibrating device described at least three respectively with the medium
The first inner wire docking of Materials Measurement part, the axial length of second inner wire is short described at least three more than or equal to 0
The axial length of the second inner wire of road calibrating device is unequal, and second inner wire coaxially sets with second outer conductor
Put.
6. dielectric material measurement apparatus according to claim any one of 1-5, it is characterised in that second inner wire is
Cylinder, second outer conductor is the circular casing being sheathed on outside second inner wire.
7. dielectric material measurement apparatus according to claim 6, it is characterised in that second inner wire and described second
Outer conductor is generally aligned in the same plane away from the end face of the short board.
8. dielectric material measurement apparatus according to claim 7, it is characterised in that put down the side of the short board both sides
Row is close to the end face of the dielectric material measuring piece in second inner wire.
9. dielectric material measurement apparatus according to claim any one of 1-5, it is characterised in that the second inner wire bag
The second fixed part and second is included to the portion that sets, second fixed part is cylinder with described second to the portion of setting, and described second consolidates
Determine portion and be provided with to support the mating groove that the portion of setting coordinates with described second, described second supports and set portion part and stretch into the mating groove, described the
Two are arranged with spring to the portion of setting, and one end of the spring is connected with described second to the portion of setting, the other end of the spring with it is described
The inwall connection of mating groove.
10. dielectric material measurement apparatus according to claim any one of 1-5, it is characterised in that the short-circuit calibrating device
It it is three, the second inner wire of one of them short-circuit calibrating device and the axial length of the second outer conductor are 0.
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