The vision passes feeling technology is to pass feeling technology 7 kinds big a medium, visual sensor is to show the image through filming to camera undertakes image is handled, will calculate the feature of object content is measured (the) such as area, centre of gravity, length, position, output data and the sensor that judge an outcome. Visual sensor is the immediate source of information of system of whole machine vision, main by or composition of two graphs sensor, deserve to assist device with smooth projector etc even sometimes. The main function of visual sensor is the most primitive picture that gets adequate machine vision system to want to handle.

 

 

 

The vision expresses the working principle of feeling

 

The vision results from a kind of way that biology bound gets external environment information, it is the most significant step that nature living things gets information, it is one of core composition of biology intelligence. The mankind the information of 80% is to rely on a vision to get, be based on this to inspire researcher to begin to install “ eye ” to make for machinery the machine passes “ to see ” get outside information as the mankind, was born from this vision of computer of —— of a burgeoning course, people passes the research of system of opposite content vision to imitate system of vision of the machine that make thereby, although differ with human vision system very big, but this is revolutionary progress the technology to sensor. The essence of visual sensor technology is image processing technology, the signal scale that adopts intercept object surface appears thereby into image in researcher before.

 

Visual sensor is had capture from a whole image of the light of thousands of like element. The clarity of image and exquisite degree are measured normally with resolution, express in order to resemble element amount. In capture after image, visual sensor has the fiducial picture of the memory in its and memory comparative, in order to make an analysis. For example, if visual sensor is inserted correctly to have the machine part of 8 bolt to discern by set, criterion sensor knows should the part that rejection has 7 bolt only, or the component that bolt did not aim. In addition, no matter this machine component is located in the which position in visual field, no matter whether this component rotates inside 360 degrees of limits, the occurrence that can make judgement vision pass feeling technology solved visual sensor because size limits space or other sensor detects facility is giant and the issue that cannot handle, from this wide the reception that gets industry to make a group.

 

The vision passes feeling technology to include 3D vision to pass feeling technology, 3D vision sensor has extensive use, for instance multimedia mobile phone, network is photographed picture, medicine of system of security of navigation of vision of digital camera, robot, automobile, biology resembles element interface of analysis, man-machine, virtual reality, monitoring, industry detects, wireless remote pass feeling, microscope observation of technology, astronomy, marine own navigation. These different application all are to be based on technology of sensor of 3D vision image. Especially 3D video technology guides dear application is had in boat independently in industrial control, car.

 

Intelligent vision passes feeling technology also is a kind of vision passes feeling technology, intelligent vision passes the intelligent vision sensor below feeling technology to also call intelligence camera, it is a development of machine vision domain is the rapiddest in recent years new technology. Intelligent camera is one holds an image concurrently to collect, the system of small-sized machine vision that image processing and information transfer a function, be a kind embedded computer vision system. It mixes module of processor of image sensor, number, communication other peripheral is compositive arrive inside a single watch for an opportunity, as a result of the design of this kind of unifinication, what can reduce a system is complex degree, raise dependability. Systematic measure is greatly narrow at the same time, widened the applied domain of visual technology.

 

Of intelligent vision sensor learn easily, use easily, Yi Wei is protected, installation is convenient, can be in short-term inside compose builds the advantage such as a reliable and effective vision testing system to make this technology gets flying development. The image of visual sensor collects unit to basically resemble machine, optical system, lighting system and image collecting calorie of composition by CCD/CMOS, will optical video changeover becomes digital image, deliver image to handle unit.

 

The vision sends the application of feeling technology

 

One, testing system of vision of car automobile body

 

Automobile body shapes is one of crucial process that the car makes, strict to the each index requirement of automobile body, need to undertake to automobile body of 100% detect. Traditional automobile body detects the method is to use 3 coordinate to measure machine, its operation is complex, rate is slow, time limit for a project is long, can have sampling observation only. Normally, the crucial dimension of automobile body basically is installation of windshield dimension, door position of opening of position of side is in arris, fixed position. Because this vision sensor distributings at these positions around, measure the dimensional position size of its corresponding arris margin, aperture, surface. On product line the design surveys worker worker, after automobile body locates, park inside one frame, the metallic column that frame distributings by freely, lever is formed, can install visual sensor neatly according to needing to be on frame. The amount according to measurement point can install the visual sensor of relevant measure, (Normally sensor of every vision below the circumstance measures a) of the dot that be measured, include sensor of binocular and stereo vision, outline sensor to wait for a variety of types according to the sensor of different form.

 

Measure systematic work process to be: Carry automobile body to arrive by product line survey worker worker undertake allowing to decide, next sensor begins the work by requirement order, the computer collects test point image and undertake handling, the space that computation gives to be measured to nod is three-dimensional coordinate, value comparing adjusts computational value and level, reach detect result, send automobile body survey worker worker.

 

2, sectional dimension is online the vision surveys a system

 

In industrial production, seamless steel tube is a kind of main industry product, and its quality parameter is production important data, among them the linearity of steel tube and cut area are main geometrical parameter, it is the key that controls seamless steel tube to produce quality, but because the following reason makes,the measurement of parameter becomes difficult problem:

 

1, seamless steel tube adopts blame contact to measure, and production spot environment is harsh;

 

2, the dimensional size of seamless steel tube is large, this also asks testing system has very big measurement space. The vision passed the occurrence of feeling technology to solve afore-mentioned problems, the dispute contact that the vision expresses feeling technology to use is measured and measure range big.

 

Measure a system to be comprised by many structures smooth sensor, the smooth plane with smooth projectile projector of the structure on sensor intersects with the steel tube that be measured, get steel tube sectional and circumferential the partial circular arc that go up, sensor measures partial circular arc the position in the space. Each sensor in the system realizes what a sectional upside divides circular arc to measure, adopt proper mathematical method, plan to add up to the dimensional seat that gets sectional dimension and sectional the centre of a circle by circular arc, the space that distributings by sectional the centre of a circle includes sth resembling a net, get linearity parameter. Measure a system to be below the control of the computer, can finish inside several seconds measure, satisfy requirement of real time sex.

 

3, vision of three-dimensional form appearance is measured

 

In three-dimensional form appearance digitlization measures a technology is converse project and product digitlization design, management and production base prop up a technology. It is visual blame contact, will fast that what it realizes three-dimensional form appearance to digitlize metrical mechanism measure and the number becomes newest high resolution to be united in wedlock like technical photograph. The object that measures as a result of place is large more, the object that has complex face, measure normally cent is gotten for local and three-dimensional information and integral joining together two parts, use visual scanning sensor to be opposite first each local district have appearance of the form that be measured measure, use joining together technology to have appearance of each part form joining together gets whole picture finally again.

 

The visual scanning of this sensor measures a head to use bureau territory binocular and stereo vision measures a principle to design. Joining together of form appearance whole is the data that collects place is put to communal coordinate essentially, can get integral data is described so. Be opposite with different point of view and position from the upper part that measures a space through camera of high resolution number be measured to undertake data is collected, use beam of light directional hand in collecting smooth difference to the principle gets coordinate of reference point space and build global coordinate is, through each coordinate the department has associated, transition finally, joining together of the data that finish.

 

How to choose visual sensor?

 

Current, how to choose machine vision sensor to be in contemporary applied it may be said is more and more extensive, how choosing machine vision sensor is worth us to learn well, how do we choose machine vision sensor with respect to thorough knowledge now. Camera is the eye of machine vision system, and the heart of camera is image sensor. The choice of sensor depends on the sufficient understanding that the cost of system of vision of accuracy, output, sensitivity, machine and correspondence use a requirement. The basic understanding of main to sensor function can help development staff narrow quickly their search limits, find appropriate sensor.

 

The user of most machine vision system realises camera is crucial essential factor of the system, often regard it as the “ chip ” of visual system. Camera itself is a complex system: Include interface of processor of camera lens, signal, communication, and most the parts of an apparatus that the partial —— of core changes photon into the electron: Image sensor. The component of camera lens and other cooperates to support the function of camera jointly, sensor decides the highest function of camera finally.

 

A lot of discussion be centered on processing technique inside course of study, and CMOS and bad of what of actor of CCD sensor what. These two kinds of technologies have its advantage and insufficient place, machines sensor is having different property. What final user cares is not sensor it is “ how ” is made come out, however its are using medium show finally.

 

In designation application, 3 crucial essential factor decided the alternative of sensor: Dynamic limits, speed and responsibility. Dynamic limits decides a system can the quality of the image of capture, also be called those who make pair of detail to reflect ability. What the speed of sensor points to is the sendout of the picture that per sec. sensor can produce how many pieces of image and system to be able to be received. What responsibility points to is the efficiency that sensor is photon changeover the electron, it decides the system needs the luminance level of the image with useful capture. The technology of sensor and design decide afore-mentioned features jointly, because this system develops what there must be his when personnel is choosing sensor to measure a level, study these features in detail, will conduce to make correct judgement.