CN106052618A - Method of measuring distance between PCB and pad center and measurement device applying method - Google Patents
Method of measuring distance between PCB and pad center and measurement device applying method Download PDFInfo
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- CN106052618A CN106052618A CN201610572828.3A CN201610572828A CN106052618A CN 106052618 A CN106052618 A CN 106052618A CN 201610572828 A CN201610572828 A CN 201610572828A CN 106052618 A CN106052618 A CN 106052618A
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- limit
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/16—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring distance of clearance between spaced objects
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- Length Measuring Devices With Unspecified Measuring Means (AREA)
Abstract
The invention discloses a method of measuring a distance between a PCB and a pad center and a measurement device applying the method. The method comprises the following steps: a measurement platform is provided, and a measurement coordinate system is set; a PCB is provided, wherein the PCB is provided with a pad, the PCB comprises a first positioning edge and a second positioning edge, and the pad comprises a third positioning edge and a fourth positioning edge; the PCB is aligned with the Y axis of the measurement coordinate system with the first positioning edge or the second positioning edge, the distance between the first positioning edge and the third positioning edge is measured and marked as L1, and the distance between the fourth positioning edge and the second positioning edge is measured and marked as L2; and the distance between the PCB and the pad center is defined as L, wherein the numerical relationship among the L, the L1 and the L2 is: L=|L1-L2|/2. The above measurement method and the measurement device have the advantages of simple steps, strong operability, good universality and high measurement efficiency.
Description
Technical field
The present invention relates to pcb board detection technique field, especially relate to the measuring method of a kind of PCB and pad center distance
And the measurement apparatus of application the method.
Background technology
Along with science and technology fast development, increasing high-end electronic product come out, affect this product quality and
One of important factor of serviceability be exactly control unit mainly comprise parts-pcb board.Thus in order to ensure PCB
The crudy of plate, consigner would generally propose various quality testing requirements, such as, require to control pcb board pcb board producer
The distance etc. of central axis extremely a certain square pad center axis.Traditional measuring method is to use Quadratic Finite Element, projector etc., directly
The measuring process seen is: first measuring the appearance profile line of pcb board, then structure ejecting plate central axis, in like manner measurement construct goes out to refer to
Determine the central axis of pad, finally measure the distance between these two axis.If the automaticity of measuring instrument is higher, to effect
The impact of rate is little, but for measuring instrument as the highest in automaticities such as projectors, measures operation and just compare
Wasting time and energy, inefficiency, economy is bad.
Summary of the invention
Based on this, the present invention provides a kind of PCB measuring method with pad center distance and the measurement dress of application the method
Put, be to overcome the defect of prior art so that calculate pcb board center simpler to the method for pad center distance, detection
Step is few, workable and efficiency is high.
The object of the present invention is achieved like this:
A kind of PCB and the measuring method of pad center distance, comprise the steps:
S100 a: measuring table is provided, and sets a measurement coordinate system；
S200: provide a pcb board, pcb board is provided with at least one pad；Wherein, pcb board includes the first limit, location and
Two limit, location, pad includes the 3rd limit, location and the 4th limit, location；
S300: pcb board is alignd with the Y-axis measuring coordinate system with the first limit, location or the second limit, location, measures first fixed
Limit, position and the spacing on the 3rd limit, location, be designated as L1, measure the spacing on the 4th limit, location and the second limit, location, be designated as L2；
S400: set the centre distance of pcb board and pad as L；Wherein the quantitative relation between L, L1 and L2 three is: L
=| L1-L2 |/2.
Below technical scheme is further described:
Further, also include in step S300 step when L1 < during L2, by pcb board with the first limit, location and/or the
Two position the adjacent edges of boards in limit is placed in the X-axis measuring coordinate system, will position limit phase with the 3rd limit, location and/or the 4th on pad
Adjacent web is placed in the X-axis measuring coordinate system, and records two endpoint values on edges of boards and be respectively two ends on X1 and X4, web
Point value is respectively X2 and X3, and the X-axis coordinate figure simultaneously recording pad center is X01, and the X-axis coordinate figure at record pcb board center is
X02；
Now, the numerical values recited of L is:
L=X02-X01
=(X1+X4)/2-(X2+X3)/2
=[(X4-X3)-(X2-X1)]/2
=(L2-L1)/2.
Further, in step S300, also include that step is as L1 > L2 time, now record pcb board center X-axis coordinate figure
For X01, the coordinate figure of record pad center is X02；
Now, the numerical values recited of L is:
L=X02-X01
=(X2+X3)/2-(X1+X4)/2
=[(X2-X1)-(X4-X3)]/2
=(L1-L2)/2.
Further, in step S400, also include that step, when pcb board quantity to be measured is multiple, is measured all
The numerical value of L1 and L2 on pcb board, arithmetic system generates computing formula L=| L1-L2 |/2, and the value of typing L1 and L2 can be automatically
Calculate the L-value of all PCB.
Further, the first limit, location, the second limit, location, the 3rd limit, location and the 4th limit, location are homogeneous in step s 200
The most parallel.
Further, it is the most vertical that described edges of boards position limit, the second limit, location with described first, described web and the described 3rd
Position limit, the 4th limit, location the most vertical.
The present invention also provides for a kind of measurement apparatus applying PCB and the measuring method of pad center distance, including being provided with survey
The measuring table of amount coordinate system and pcb board, described pcb board coordinates with described measurement coordinate system, and described pcb board includes at least one
Individual pad.
Further, described pcb board has symmetrical centre, and described pad is positioned at left side or the right side of this symmetrical centre.
The beneficial effects of the present invention is:
Above-mentioned PCB passes through to place pcb board in the measurement coordinate system of measuring table with the measuring method of pad center distance,
Pcb board is alignd with the Y-axis measuring coordinate system with the first limit, location or the second limit, location, measures the first limit, location and the 3rd location
The spacing on limit, is designated as L1, measures the spacing on the 4th limit, location and the second limit, location, is designated as L2, defines the center of pcb board and pad
Distance is L；Can conveniently calculate L=| L1-L2 |/2 afterwards, the step of above-mentioned measuring method is simple, operability
By force, versatility is good and measures efficiency height.
The measurement apparatus of the measuring method work of above-mentioned application PCB and pad center distance, by the survey at measuring table
Place pcb board in amount coordinate system, pcb board is alignd with the Y-axis measuring coordinate system with the first limit, location or the second limit, location, measures
First limit, location and the spacing on the 3rd limit, location, be designated as L1, measure the spacing on the 4th limit, location and the second limit, location, be designated as L2,
Definition pcb board is L with the centre distance of pad；Can conveniently calculate L=| L1-L2 |/2 afterwards, above-mentioned measurement fills
The measuring process put is simple, workable, and versatility is good and measures efficiency height.
Accompanying drawing explanation
Fig. 1 is the flow chart of the PCB described in the embodiment of the present invention and the measuring method of pad center distance；
Fig. 2 is the measurement apparatus of the application PCB described in the embodiment of the present invention and the measuring method work of pad center distance
Structural representation.
Description of reference numerals:
100, measuring table, 120, measure coordinate system, 200, pcb board, 220, pad, the 222, the 3rd limit, location, 224, the
Four limit, location, the 240, first limit, location, the 260, second limit, location.
Detailed description of the invention
Below embodiments of the invention are described in detail:
Such as Fig. 1, shown in Fig. 2, a kind of pcb board 200 and the measuring method of pad 220 centre distance, comprise the steps:
S100 a: measuring table 100 is provided, and sets a measurement coordinate system 120；
S200: provide a pcb board 200, pcb board 200 is provided with at least one pad 220；Wherein, pcb board 200 includes
One limit, location 240 and the second limit 260, location, pad 220 includes the 3rd limit, location 222 and the 4th limit 224, location；
S300: by pcb board 200 with the first limit, location 240 or the second limit, location 260 and the Y-axis pair measuring coordinate system 120
Together, measure the first limit, location 240 and spacing on the 3rd limit 222, location, be designated as L1, measure the 4th limit, location 224 and the second location
The spacing on limit 260, is designated as L2；
S400: set the centre distance of pcb board 200 and pad 220 as L；Wherein the quantity between L, L1 and L2 three is closed
System is: L=| L1-L2 |/2.
The measuring method of above-mentioned pcb board 200 center and pad 220 centre distance is sat by the measurement at measuring table 100
Pcb board 200 is placed, by pcb board 200 with the first limit, location 240 or the second limit, location 260 and measurement coordinate system 120 in mark system 120
Y-axis alignment, measure the spacing on the first limit 240, location and the 3rd limit 222, location, be designated as L1, measure the 4th and position limit 224 and the
The spacing of two limit 260, location, is designated as L2, and definition pcb board 200 is L with the centre distance of pad 220；Afterwards can be convenient and swift
Calculate L=| L1-L2 |/2, the step of above-mentioned measuring method is simple, workable, and versatility is good and measures efficiency height.
In the present embodiment, in order to reduce cost and measure difficulty, simplify testing procedure, described measuring table 100 simultaneously
For placing a L-type support on existing workbench, wherein, the corner of L-type support is set as measuring the former of coordinate system 120
Point, vertical hack lever is the Y-axis measuring coordinate system 120, and horizontal hack lever is the X-axis measuring coordinate, simultaneously for the ease of test, described
Pcb board 200 is limited to rectangular shape.The minor face of rectangle pcb board 200 is described first limit 240, location, the length of rectangle pcb board 200
While be described second limit 260, location, minor face patch parallel with X-axis is neat, and long limit patch parallel with Y-axis is neat.Additionally, on described pcb board 200
Being provided with at least one square pads, certainly, in other embodiments, described pad can also be other shapes.Square pads
Long limit is described 3rd limit 222, location parallel with Y-axis and have certain distance, and the minor face of square pads is the described 4th fixed
Limit 224, position is the most parallel with X-axis and have certain distance.
Further, the first limit, location 240, second positions limit the 260, the 3rd and positions limit 222 and the 4th in step s 200
Limit 224, location is the most parallel.Thus so that the concordance measuring parameter is good, improve the accuracy of measurement result.Additionally,
It is the most vertical that edges of boards position limit 260 with described first limit, location 240, second, web and described 3rd location, limit the 222, the 4th, location
Limit 224 is the most vertical.From there through the direct comparison with coordinate system, each required measurement very convenient can be directly obtained efficiently
The parameter value of object, it is to avoid there is too much scaling step, the most largely on simplify measuring process, improve and measure efficiency.
Additionally, include multiple pad 220 on described pcb board 200, according to selecting different pads 220, the 3rd of pad is fixed
Limit, position 222 positions limit 224 and pcb board 200 with the spacing size on the first limit 240, location and the 4th of pad of pcb board 200
The numerical relation of the spacing size of the second limit 260, location is different, i.e. the magnitude relationship of L1 from L2 is different.Concrete, in step
S300 also including, step is when L1 is < during L2, by adjacent with the first limit, location 240 and/or the second limit 260, location on pcb board 200
Edges of boards are placed in the X-axis measuring coordinate system 120, by adjacent with the 3rd limit, location 222 and/or the 4th limit 224, location on pad 220
Web be placed in the X-axis measuring coordinate system 120, and record on edges of boards two endpoint values and be respectively on X1 and X4, web two
Endpoint value is respectively X2 and X3, and the X-axis coordinate figure at record pad 220 center is X01 simultaneously, the X-axis at record pcb board 200 center
Coordinate figure is X02；
Now, the numerical values recited of L is:
L=X02-X01
=(X1+X4)/2-(X2+X3)/2
=[(X4-X3)-(X2-X1)]/2
=(L2-L1)/2.
When being near measuring coordinate system 120Y axle side as the pad 220 measuring object, the most preferably with pcb board 200
Left side (first location limit 240) align with the Y-axis of measurement coordinate system 120, thus carrying out the big of two numerical value of L1 and L2
Measurement difficulty can be reduced further during little measurement, thus simplify measuring process, meanwhile, the number of centre-to-centre spacing size L of follow-up reckoning
Value on the occasion of, more conform to conventional practice and requirement.
Further, in step S300, also include that step is as L1 > L2 time, now record pcb board 200 center X-axis sit
Scale value is X01, and the coordinate figure at record pad 220 center is X02；
Now, the numerical values recited of L is:
L=X02-X01
=(X2+X3)/2-(X1+X4)/2
=[(X2-X1)-(X4-X3)]/2
=(L1-L2)/2.
When being away from measuring coordinate system 120Y side as the pad 220 measuring object, now the most same with pcb board
The left side (the first limit 240, location) of 200 aligns with the Y-axis measuring coordinate system 120, is thus carrying out two numerical value of L1 and L2
Size can reduce measurement difficulty when measuring further, thus simplifies measuring process, meanwhile, and centre-to-centre spacing size L of follow-up reckoning
Numerical value be on the occasion of, more conform to conventional practice and requirement.
Further, in step S400, also include that step, when pcb board 200 quantity to be measured is multiple, measures institute
Having the numerical value of L1 and L2 on pcb board 200, arithmetic system generates computing formula L=| L1-L2 |/2, and the value of typing L1 and L2 is i.e.
Can automatically calculate the L-value of all PCB.
Above-mentioned arithmetic system defaults in computer, after inputting L1 and the L2 numerical value of all pcb boards 200, according to editor
Computing formula can immediately arrive at the numerical value at the plate center of all pcb boards 200 and distance L of pad center, the most permissible
It is greatly improved measurement efficiency, improves the accuracy of measurement result simultaneously.Above-mentioned arithmetic system is preferably in the present embodiment
Excel, Matlab etc..
As in figure 2 it is shown, the present invention also provides for a kind of measuring method applying pcb board 200 center and pad 220 centre distance
Measurement apparatus, measure the measuring table 100 of coordinate system 120 and pcb board 200 including being provided with, described pcb board 200 and described survey
Amount coordinate system 120 coordinates, and described pcb board 200 includes at least one pad 220.
The measurement apparatus of the measuring method work of above-mentioned application pcb board 200 center and pad 220 centre distance, by
Pcb board 200 is placed, by pcb board 200 with the first limit, location 240 or the second location in the measurement coordinate system 120 of measuring table 100
Aliging with the Y-axis measuring coordinate system 120 in limit 260, measures the first limit, location 240 and spacing on the 3rd limit 222, location, be designated as L1,
Measure the 4th limit, location 224 and the spacing on the second limit 260, location, be designated as L2, definition pcb board 200 and the centre distance of pad 220
For L；Can conveniently calculate L=| L1-L2 |/2 afterwards, the measuring process of above-mentioned measurement apparatus is simple, operability
By force, versatility is good and measures efficiency height.
In the present embodiment, described measuring table 100 includes the device for measuring distance such as gage, passes through testing crew
Hand dipping, or this measuring table 100 also includes such as the electronic equipments such as laser range finder, is come automatically by the control of computer
Work, the automaticity not only worked is high, reduces manpower output, can also eliminate artificial error hidden danger simultaneously, improves and survey
The accuracy of amount result.
Described pcb board 200 has symmetrical centre, and described pad 220 is positioned at left side or the right side of this symmetrical centre.According to survey
Amount needs, and the different pads on pcb board 200 can be measured, are thus greatly improved the use of device by above-mentioned measurement apparatus
Performance and the scope of application.
Each technical characteristic of embodiment described above can combine arbitrarily, for making description succinct, not to above-mentioned reality
The all possible combination of each technical characteristic executed in example is all described, but, as long as the combination of these technical characteristics is not deposited
In contradiction, all it is considered to be the scope that this specification is recorded.
Embodiment described above only have expressed the several embodiments of the present invention, and it describes more concrete and detailed, but also
Can not therefore be construed as limiting the scope of the patent.It should be pointed out that, come for those of ordinary skill in the art
Saying, without departing from the inventive concept of the premise, it is also possible to make some deformation and improvement, these broadly fall into the protection of the present invention
Scope.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (8)
1. a PCB and the measuring method of pad center distance, it is characterised in that comprise the steps:
S100 a: measuring table is provided, and sets a measurement coordinate system；
S200: provide a pcb board, pcb board is provided with at least one pad；Wherein, pcb board includes that the first limit, location and second is determined
Limit, position, pad includes the 3rd limit, location and the 4th limit, location；
S300: pcb board is alignd with the Y-axis measuring coordinate system with the first limit, location or the second limit, location, measures the first limit, location
With the spacing on the 3rd limit, location, it is designated as L1, measures the spacing on the 4th limit, location and the second limit, location, be designated as L2；
S400: set the centre distance of pcb board and pad as L；Wherein the quantitative relation between L, L1 and L2 three is: L=|
L1-L2|/2。
PCB the most according to claim 1 and the measuring method of pad center distance, it is characterised in that in step S300
Also include that edges of boards adjacent with the first limit, location and/or the second limit, location on pcb board <, are placed in measurement and sit during L2 as L1 by step
In the X-axis of mark system, web adjacent with the 3rd limit, location and/or the 4th limit, location on pad is placed in the X-axis measuring coordinate system
On, and record two endpoint values on edges of boards and be respectively two endpoint values on X1 and X4, web and be respectively X2 and X3, record weldering simultaneously
The X-axis coordinate figure of disk center is X01, and the X-axis coordinate figure at record pcb board center is X02；
Now, the numerical values recited of L is:
L=X02-X01
=(X1+X4)/2-(X2+X3)/2
=[(X4-X3)-(X2-X1)]/2
=(L2-L1)/2.
PCB the most according to claim 1 and 2 and the measuring method of pad center distance, it is characterised in that in step S300
In also include that step is as L1 > L2 time, now record pcb board center X-axis coordinate figure be X01, record pad center coordinate figure
For X02；
Now, the numerical values recited of L is:
L=X02-X01
=(X2+X3)/2-(X1+X4)/2
=[(X2-X1)-(X4-X3)]/2
=(L1-L2)/2.
PCB the most according to claim 1 and the measuring method of pad center distance, it is characterised in that in step S400
Also including that step, when pcb board quantity to be measured is multiple, measures the numerical value of L1 and L2 on all pcb boards, arithmetic system is raw
Become computing formula L=| L1-L2 |/2, and the value of typing L1 and L2 can calculate the L-value of all PCB automatically.
PCB the most according to claim 1 and the measuring method of pad center distance, it is characterised in that in step s 200
First limit, location, the second limit, location, the 3rd limit, location and the 4th limit, location are the most parallel.
PCB the most according to claim 2 and the measuring method of pad center distance, it is characterised in that described edges of boards and institute
Stating the first limit, location, the second limit, location all vertical, it is the most vertical that described web positions limit, the 4th limit, location with the described 3rd.
7. the measurement of the measuring method of the PCB applied as described in any one of the claims 1 to 6 and pad center distance
Device, it is characterised in that include being provided with measuring table and the pcb board measuring coordinate system, described pcb board and described measurement coordinate system
Coordinate, and described pcb board includes at least one pad.
The measurement apparatus of the measuring method work of PCB the most according to claim 7 and pad center distance, its feature exists
In, described pcb board has symmetrical centre, and described pad is positioned at left side or the right side of this symmetrical centre.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610572828.3A CN106052618A (en) | 2016-07-18 | 2016-07-18 | Method of measuring distance between PCB and pad center and measurement device applying method |
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| CN201610572828.3A CN106052618A (en) | 2016-07-18 | 2016-07-18 | Method of measuring distance between PCB and pad center and measurement device applying method |
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| CN110333470A (en) * | 2019-07-18 | 2019-10-15 | 深圳橙子自动化有限公司 | A kind of device attachment calibration method for flying probe |
| CN110333469A (en) * | 2019-07-18 | 2019-10-15 | 深圳橙子自动化有限公司 | A kind of target point calculating method for flying probe |
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| CN110333470A (en) * | 2019-07-18 | 2019-10-15 | 深圳橙子自动化有限公司 | A kind of device attachment calibration method for flying probe |
| CN110333469A (en) * | 2019-07-18 | 2019-10-15 | 深圳橙子自动化有限公司 | A kind of target point calculating method for flying probe |
| CN110333469B (en) * | 2019-07-18 | 2021-10-29 | 深圳橙子自动化有限公司 | Target point calculation method for flying probe test |
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Application publication date: 20161026 |