CN108759981A - Feed entrance point detection module is flown up to using photosensitive sensor - Google Patents
Feed entrance point detection module is flown up to using photosensitive sensor Download PDFInfo
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- CN108759981A CN108759981A CN201810403255.0A CN201810403255A CN108759981A CN 108759981 A CN108759981 A CN 108759981A CN 201810403255 A CN201810403255 A CN 201810403255A CN 108759981 A CN108759981 A CN 108759981A
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- detection module
- entrance point
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- 230000008901 benefit Effects 0.000 abstract description 8
- 239000000463 material Substances 0.000 description 12
- 230000005540 biological transmission Effects 0.000 description 4
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- 108091008695 photoreceptors Proteins 0.000 description 4
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
- G01F23/284—Electromagnetic waves
- G01F23/292—Light, e.g. infrared or ultraviolet
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- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The present invention relates to a kind of feed entrance point detection module is flown up to using photosensitive sensor, it is this to fly up to include digital control mechanism, including charging ratchet, linear array photosensitive sensor and light source, the photosensitive element that linear array photosensitive sensor is arranged by several high density linears is constituted, the light of the light source is radiated on the charging ratchet, it is projected on the linear array photosensitive sensor, after the linear array photosensitive sensor perception projection, location information is sent to the digital control mechanism flown up to.The present invention can greatly improve the precision and working efficiency of chip mounter, can bring higher economic benefit.
Description
Technical field
It is particularly a kind of to fly up to feed entrance point using photosensitive sensor the present invention relates to the field surface mount (SMT)
Detection module.
Background technology
It flies up to be that SMD surface mount elements are attached thereto, a kind of equipment that element carries out patch is provided for chip mounter.Electricity
It is dynamic to fly up to be for realizing that high speed, accurately the equipment of Full automatic feed to the compatible strong of element is most closed in chip mounter
One of accessory of key.
The core competitiveness flown up to is, feeds precision, charging rate, applicable component type etc..
The method for improving charging precision at present mainly has following 2 kinds of methods：
1, common electric machine is substituted using stepper motor with encoder.
Advantage：Development difficulty is low；There is feedback that motor desynchronizing, precision will not be caused high.
Disadvantage：3-10 times of price common electric machine, cost increase obvious；Volume is big, is not suitable for flying up to this
Small sized product；Realize that high-precision charging is more demanding to transmission mechanism, because the precision of motor thus can only react the position of motor
Set precision rather than the positional precision of material strip.
2, the position of charging hook tooth is detected using infrared emission photoelectric sensor.
Advantage：Of low cost, installation is simple, will not driven precision influence from final stage detection.
Disadvantage：Material strip hole determines that charging hook tooth is 4mm spacing, uncomfortable for the 2mm spacing material strip such as 0402,0201
With；Accuracy of detection is low, it is difficult to realize that high-precision is fed；Feed entrance point is fixed, can only by adjusting sensing station come change into
Discharge position.
Increase the concrete scheme of applicable component type:
Flying up to applicable component type is mainly influenced by charging precision, and material strip location hole general international standard is
4mm, and the spacing of electronic original part is then not of uniform size, the element such as 0201 of compact package is 2mm spacing on material strip, and element is wide
Only 0.254mm is spent, feed entrance point slightly deviation may result in mounting head and take less than material, only lean on number of motor steps and photoelectric sensor list
Point detection hook tooth (width about 1.2mm) is difficult to reach required precision to judge feed entrance point, such as due to inertia or vibrations etc.
Reason, hook tooth does not stop in sensor-triggered point but slightly rotation is excessive, at this point, can not determine specific departure,
Deviation can not be corrected, the precision of demand cannot be reached；Material strip hole determines that the space width of charging ratchet also can only be
4mm can only be simulated by calculating number of motor steps with gear ratio when needing using 2mm spacing components, rather than logical
Sensor accurate position determination is crossed, in addition the error that drive mechanism is brought, makes precision further decrease.
After having used linear array photosensitive sensor to coordinate light source, the position for feeding ratchet can be directly photosensitive by linear array
Sensor obtains, and precision is up to μm grade；The material strip that feed entrance point is adapted to different elements interval can be adjusted by software；When by
External interference flies up to charging when not being parked in target point, can also obtain current location information and specific with host computer communication statement
Error.To reach requirement of the smaller potted element to precision, the adaptation to small package element is realized.
Invention content
The present invention is primarily to overcome the location aware of feeding equipment in the prior art inaccurate, the adjustment for error
Complicated problem, linear array photosensitive sensor is used in the electronic kinetic control system flown up to, and use is simple in structure, compact
Design improve the charging precision that flies up to and applicable component kind.
The present invention feeds the position of hook tooth using linear array photosensitive sensor cooperation light source detection, and focuses on the small of module
Type, and flies up to integrally-built adaptability.Specific scheme is, a kind of to be detected using the feed entrance point that flies up to of photosensitive sensor
Module, it is this to fly up to include digital control mechanism, including charging ratchet, linear array photosensitive sensor and light source, material strip are state
Border standard, market upper feeding hook tooth spacing is 4mm, and the facewidth is almost the same, and only radius is different, therefore all models are suitable
With the technology.And in the present invention, for light source requirements, brightness is substantially uniform when as reaching photosensitive sensor.The linear array sense
The photosensitive element that optical sensor is arranged by several high density linears is constituted, and the light of the light source is radiated at the charging ratchet
On, it is projected on the linear array photosensitive sensor, after the linear array photosensitive sensor perception projection, location information is sent to institute
State the digital control mechanism flown up to.
Preferably, further include guide-lighting slot, the light of the light source is reflected by the guide-lighting slot, is radiated at described
On the hook tooth for feeding ratchet.Theoretically, have no special requirement for the location of light source, light source, charging ratchet and
Linear array photosensitive sensor can be successively configured according to the position of upper, middle and lower, can also be carried out from space-saving angle
Layout.For example guide-lighting slot is designed to U-shaped structure, it is mounted on linear array photosensitive sensor in the same end, the light that light source gives out
Line passes through 2 secondary reflections, can be radiated at charging ratchet successively, on linear array photosensitive sensor, and on linear array photosensitive sensor
Projection is formed, accurately detects the position of charging ratchet.
Preferably, linear array photosensitive sensor is linear CCD sensor.It compares and area array CCD, the advantages of line array CCD is
One-dimensional pixel number can be made very much, and resolution ratio is higher, and pixel dimension is more flexible, and frame width number is high, cheap, especially
Measurement suitable for one-dimensional dynamic object.Ccd image sensor CCD (Charge Coupled Device) is used
A kind of semi-conducting material of high sensitivity is made, and when illumination is mapped on CCD silicon chips, is generated in the semiconductor body near grid
Electron-hole pair, majority carrier are arranged by grid voltage, and minority carrier, which is then collected in potential well, forms signal electricity
Lotus, when applying the pulse of specific time sequence to it, the signal charge of storage can make directional transmissions in CCD and realize and sweep certainly
It retouches.The photosensitive element that line array CCD is arranged by high density linear is constituted.
Line array CCD is placed in below charging hook tooth, the illumination of uniform luminance provided from above, hook tooth will be in CCD
On leave shadow, by CCD detect by the specific location of hook tooth shading, you can determine the position of material strip, and trueness error can
It is limited within 1 pixel, i.e. the photosensitive element spacing distance of CCD, up to μm grade depending on CCD type selectings, due to being in most end
Grade detection can ignore transmission accuracy influence；Can be chosen by software approach different pixels it is as a reference point so as to adjust
Feed entrance point.
Preferably, the linear CCD sensor is curved arrangement, and curvature is consistent with the charging curve of ratchet.
The shape of linear array photosensitive sensor not necessarily straight line, and may be with curvature or other shapes.If line array CCD
For linear, each adjacent two pixel spacing and the angle in the ratchet center of circle are unequal, a picture so that hook tooth is often passed by
The length that vegetarian refreshments is advanced is unequal, will produce slight errors at this time；If CCD is curved shape, crooked radian and charging ratchet one
When cause, the influence of this error can be eliminated.
Preferably, the linear array photosensitive sensor is CMOS cameras or area array CCD photosensitive sensor.CMOS cameras with
The advantages of area array CCD is can to obtain two-dimensional image information, and it is intuitive to measure image.Compared to two kinds CCD, CMOS cameras power consumption is more
It is low.
Preferably, the light source is LED light source.For relative laser light source, LED light source is cheap, low in energy consumption, body
Product is small, driving circuit is simple, and laser light source directive property is high, high to light path demand.
Preferably, the photosensitive sensor is used in combination for several, such as multiple sensors are tangentially put along ratchet
It sets, increases and effectively measure area；Or multiple sensors are placed at an angle with ratchet tangent line, make pixel radial more close
Collection sacrifices a certain amount of measurement area and exchanges higher precision for；
The present invention has the following advantages relative to existing design：1. after CCD detections hook tooth position, fly up into
Material precision can be controlled in a μm grade, can greatly improve the precision of chip mounter；2. flying up to be one of key fitment of chip mounter, every
Chip mounter can all configure tens of to up to a hundred handles and fly up to, by detecting the error of charging ratchet, automatic feedback and adjust automatically automatically
Ratchet can improve working efficiency, can bring higher economic benefit；3. the modular structure of the present invention is simple, easy to implement,
It is easy to promote and apply.
Description of the drawings
In order to illustrate more clearly of the present invention, will simply be situated between to attached drawing needed in embodiment description below
It continues.It should be evident that the accompanying drawings in the following description is only the description to the embodiment of the present invention, for ordinary skill
For personnel, without having to pay creative labor, simple deformation or title can also be carried out according to technical solution
Variation, or customary means is taken, it can also realize goal of the invention.
Fig. 1 is a kind of position view for flying up to feed entrance point detection module using linear array photosensitive sensor
Fig. 2 is a kind of stereogram for flying up to feed entrance point detection module using linear array photosensitive sensor
Fig. 3 is a kind of sectional view for flying up to feed entrance point detection module using linear array photosensitive sensor
Fig. 4 is a kind of stereogram for flying up to feed entrance point detection module using linear array photosensitive sensor (containing guide-lighting slot)
Fig. 5 is the light path schematic diagram of guide-lighting slot
Fig. 6 is the situation that linear linear array photosensitive sensor is changed to curved shape photosensitive sensor
Fig. 7 is the situation that linear CCD sensor is changed to matrix CCD
Label declaration：1- feeds ratchet；2- light sources；3- linear CCD sensors；4- leaded light slots；5- connectors；6- fly up into
Discharge position detection module；7- feeding points；8- matrix CCDs
Specific implementation mode
With reference to embodiment, the present invention is described in further detail, following embodiment be explanation of the invention and
The invention is not limited in following embodiments.
Embodiment 1
As shown in Figure 1, flying up to feed entrance point detection module using linear array photosensitive sensor present embodiment discloses a kind of.
The location of module is determined that module is mounted on ratchet circumference any point, and ratchet is generally in feeding point rear, module by ratchet
Relative to fly up to, the position relationship of feeding point as shown in Figure 1, fly up to feed entrance point detection module 6 be located at fly up to whole front,
Feeding point flies up to the location of feed entrance point detection module 6 positioned at close.Feed entrance point detection module 6 is flown up to by charging ratchet
1, light source 2, the composition of linear CCD sensor 3 further include that the connector 5 for the power supply for providing energy for light source (does not show in the present embodiment
Go out).In the present embodiment light source be LED light, using the characteristics of this kind of light source be LED light it is small, it is cheap, spend in the same direction it is relatively low,
The light of approaches uniformity brightness can be formed by diffusing reflection, it is low to optical path requirements.Make the photosensitive area edges of CCD just with ratchet tooth root
Circle is tangent.
Line array CCD photoreceptor selection TSL1401CL, the model are for 400DPI with 1*128 pixel, resolution ratio
63.5 μm/pixel.The method of specific detection module operation is as shown in Figure 2 and Figure 3, opens LED light, and control motor is logical when 4mm is fed
Crossing transmission mechanism drives charging ratchet 1 to rotate, and stops whenever reaching 33 pixel of line array CCD photoreceptor in shade, should
33rd pixel is the 33rd started since the position that charging ratchet 1 is cut with line array CCD photoreceptor, feeds at this time
Deviation must be in 63.5 μm；When 2mm is fed, control shade stops when reaching the 33rd and 64 pixel respectively, and error must
Less than 63.5 μm, 32 μm.Its principle is, when the shading value that pixel is got is just when detecting critical point, it is possible to meeting
Generate the deviation of a pixel, if the 33rd pixel is 0 μm, then the 64th is 1968.5 μm, if generate deviation also only can before
The 65th pixel (2032 μm) is entered, error is less than 32 μm.
When error occurs in charging ratchet 1, this module can detect specific departure, be transmitted directly to fly up to digital control
Mechanism processed, the positive and negative control ratchet that transfers of control motor reach designated position；Or by flying up to digital control mechanism and chip mounter master control
Departure is informed in device communication processed, adjusts mounting head feeding position by master controller to achieve the effect that eliminate error.
Embodiment 2
As shown in figure 4, difference of the present embodiment from embodiment 1 is to further include a guide-lighting slot 4.Guide-lighting slot 4 is by POM
Material is made, and is designed to that inverted U-shaped pattern, light can be reflected through 4 reflective surface of guide-lighting slot.Light source 2 is LED light, is mounted on
The homonymy of line array CCD photoreceptor.The light that LED light 4 is sent out can be radiated at charging ratchet 1 by 2 secondary reflections of guide-lighting slot 2
On tooth, then it is projected on linear CCD sensor.Linear CCD sensor 3 is connected with digital control mechanism, provides charging ratchet 1
Location information, and fed back and corrected.The light path of inverted U-shaped leaded light slot is as shown in Figure 5.
Module disclosed in this implementation is the improvement for needing to carry out according to its features of shape and spatial design so that this cloth
Office is more flexible, enhances the adaptability of module entirety.Light path is lengthened, direct projection is avoided, is more uniformly distributed when light being made to reach sensor,
Reduction is interfered caused by light source.
Embodiment 3
As shown in fig. 6, the present embodiment and embodiment 1 the difference lies in that the not instead of straight line of linear CCD sensor 3,
With certain curvature, curvature is identical as charging ratchet 1.This design is that pixel is equal compared to the advantages of embodiment 1
Even distribution is avoided that the ratchet distance represented between each two neighbor pixel has the problem of subtle gap.
Embodiment 4
As shown in fig. 7, the present embodiment and embodiment 1 the difference lies in that linear CCD sensor 3 is replaced with area array CCD biography
Sensor 8 obtains ratchet two dimensional image rather than one-dimensional data to judge its position, allows the controller to that number is more setup flexibly
According to improving precision by algorithm.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
Member, without departing from the inventive concept of the premise, can also make several improvements and modifications, these improvements and modifications also should be regarded as
In protection scope of the present invention.Although the present invention is disclosed as above with embodiment, it is not limited to the protection of the present invention
Range, any technical staff for being familiar with this technology change made by without departing from the spirit and scope of the invention and retouching,
It is within the scope of protection of the invention.
Claims (7)
1. a kind of flying up to feed entrance point detection module using photosensitive sensor, described to fly up to include digital control mechanism, special
Sign is, including charging ratchet, linear array photosensitive sensor and light source, and the linear array photosensitive sensor is by several high density linears
The photosensitive element of arrangement is constituted, and the light of the light source is radiated on the charging ratchet, is projected in the photosensitive sensing of the linear array
On device, after the linear array photosensitive sensor perception projection, location information is sent to the digital control mechanism flown up to.
2. a kind of as described in claim 1 fly up to feed entrance point detection module using linear array photosensitive sensor, feature exists
In further including guide-lighting slot, the light of the light source is reflected by the guide-lighting slot, is radiated at the ratchet of the charging ratchet
On tooth.
3. a kind of as claimed in claim 1 or 2 fly up to feed entrance point detection module, feature using linear array photosensitive sensor
It is, the linear array photosensitive sensor is linear CCD sensor.
4. a kind of as claimed in claim 3 fly up to feed entrance point detection module using linear array photosensitive sensor, feature exists
In the linear CCD sensor is curved arrangement, and curvature is consistent with the charging curve of ratchet.
5. a kind of as claimed in claim 1 or 2 fly up to feed entrance point detection module, feature using linear array photosensitive sensor
It is, the linear array photosensitive sensor is CMOS cameras or area array CCD.
6. a kind of as claimed in claim 1 or 2 fly up to feed entrance point detection module, feature using linear array photosensitive sensor
It is, the light source is LED light source.
7. a kind of as claimed in claim 1 or 2 fly up to feed entrance point detection module, feature using linear array photosensitive sensor
It is, the photosensitive sensor is used in combination for several.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810403255.0A CN108759981A (en) | 2018-04-28 | 2018-04-28 | Feed entrance point detection module is flown up to using photosensitive sensor |
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| CN201810403255.0A CN108759981A (en) | 2018-04-28 | 2018-04-28 | Feed entrance point detection module is flown up to using photosensitive sensor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115119497A (en) * | 2022-08-31 | 2022-09-27 | 合肥安迅精密技术有限公司 | Tape-type flight-reach correction method and system for chip mounter and storage medium |
| CN116113229A (en) * | 2023-04-14 | 2023-05-12 | 合肥安迅精密技术有限公司 | Method and device for guaranteeing consistency of feeding points of multiple femtocells and storage medium |
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| CN107764198A (en) * | 2017-11-02 | 2018-03-06 | 天津大学 | Engine rotor and stator blade axial gap light projection measuring device and method |
| CN208187500U (en) * | 2018-04-28 | 2018-12-04 | 浙江登新科技有限公司 | It is a kind of to fly up to feed entrance point detection module using photosensitive sensor |
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2018
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| US20050111335A1 (en) * | 2003-10-24 | 2005-05-26 | Kenichi Kasazumi | Two-dimensional photoreceptor array, holographic optical information playback device, and holographic optical information recording device |
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| CN107395929A (en) * | 2017-08-15 | 2017-11-24 | 宜科(天津)电子有限公司 | 360 ° of detection sensors and detection method based on area array CCD/CMOS |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115119497A (en) * | 2022-08-31 | 2022-09-27 | 合肥安迅精密技术有限公司 | Tape-type flight-reach correction method and system for chip mounter and storage medium |
| CN116113229A (en) * | 2023-04-14 | 2023-05-12 | 合肥安迅精密技术有限公司 | Method and device for guaranteeing consistency of feeding points of multiple femtocells and storage medium |
| CN116113229B (en) * | 2023-04-14 | 2023-06-09 | 合肥安迅精密技术有限公司 | Method and device for guaranteeing consistency of feeding points of multiple femtocells and storage medium |
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Effective date of registration: 20191225 Address after: 310000 east of 5th floor, building 3, No. 8-2, Keji Avenue, Yuhang street, Yuhang District, Hangzhou City, Zhejiang Province Applicant after: Hangzhou chuangsida Precision Technology Co., Ltd Address before: 313300 No. 18 Tian Zi Hu Avenue, modern industrial park, Anji County, Huzhou, Zhejiang Applicant before: Zhejiang Deng Xin Technology Co., Ltd. |