In the field of product manufacturing, appearance size inspection is a very important link, before a product reaches the hands of consumers, from the initial materials, parts, to the final product, may go through hundreds of different appearance and size inspection processes.
Appearance and size inspection requires high labor costs, but the inspection efficiency and effect may not be satisfactory. Therefore, more and more factories are starting to use visual inspection equipment to inspect the appearance and size of products.
The dimensional measurement method based on machine vision inspection technology has the advantages of low cost, high precision, high efficiency and convenient operation. Its non-contact, real-time, flexible and accurate ability can effectively solve the problems of traditional detection methods.
/ robotzone intelligence/
In 2011, China's machine vision market began to start, and the industry entered a period of rapid development.
In 2011, the market size of China's machine vision industry was about 10800 million yuan; In 2013 it reached 35400 million yuan, an increase of 55 percent year-on-year94%。
In 2016, the market size reached 69400 million yuan, a year-on-year increase of 134%, accounting for about 15% of the global market.
As of 2018, the application of visual products in the field of electronic accessories has exceeded 200 million output value, and there is still greater potential for the market to be tapped in the future.
Dimensional measurement is the most common application industry of machine vision technology, especially in the automated manufacturing industry, where machine vision is used to measure various dimensional parameters of workpieces, such as:Length measurement, circle measurement, angle measurement, radian measurement, area measurement, etcLet's talk about the appearance size measurement and inspection in machine vision.
What is dimensional inspection?
Dimensional inspection is based on the drawing, to detect whether the product size is within the tolerance range, in order to find the error of shape and size.
In addition, the accuracy of the position of the machining datum, the distribution of the machining allowance, and the deviation of the wall thickness can be carefully checked.
Methods of dimensional measurement and inspection
The actual size of the product is often indispensable, but it may not be available due to the complexity of the surface of the object or the limitations of objective physical conditions. Machine vision inspection technology can handle such problems well.
In traditional automated production,The typical method of dimensional inspection is the manual use of micrometers, vernier calipers, feeler gauges, etcIt is measured by the naked eye, but the measurement accuracy and speed of such a measurement method are low and slow, and it cannot meet the needs of large-scale automated production.
The dimensional measurement method based on machine vision can effectively solve the problems existing in traditional inspection methods due to its non-contact, real-time, flexible and accurate characteristics.
In addition, the size measurement method based on machine vision can not only obtain the size parameters, but also give feedback information in time according to the measurement results, correct the processing parameters, avoid more defective products, and reduce the loss of the enterprise.
Measure various dimensional parameters of the workpiece, such as:Length measurement, circle measurement, angle measurement, line arc measurement, area measurement, etcThe automatic detection and judgment system based on machine vision can automatically measure and judge the inner and outer dimensions, bridge width, groove width and other parameters of various types of apertures, and detect the basic geometric characteristics of the relevant areas of the workpiece.
Therefore, after extracting the edge of the part or the corner of the part, how to detect the geometric features, shape parameters, position size, etc. of the workpiece is the main content of the machine vision system software working in the background.
Based on the detection of different parts and components on the industrial production line, the parts size inspection of machine vision is mainly divided into:Image acquisition, image analysis and processing, display results and controlThree parts.
The software realizes the workpiece size detection, including image acquisition, image processing, feature extraction, size calculation and result output, etc., and its basic process is as follows.
Image acquisition, image processing, feature extraction, size calculation, output results.
Dimensional measurement and inspection applications
Electronic components, auto parts, mobile phone parts, screws and nuts, hardware, magnetic materials, plastics, ceramics, buttons and other composite components, magnesium, aluminum and their alloys can be tested using machine vision inspection technology.
Compared with traditional product inspection methods, machine vision inspection has the characteristics of objectivity, non-contact and high precision.
Especially in the field of industrial production, it has a strong application value in repetitive and mechanical work, and for manufacturers, product quality enterprises can improve product competitiveness and achieve long-term development.
Ruzhong intelligent appearance size inspection machine
Ruzhong intelligent appearance size inspection machine is mainly used for the appearance and size of the product.
It can monitor the undesirable factors within the visual range such as scratches, dirt, missing corners, warping, burrs and other visual aspects of the product, and can also monitor the appearance plane size of the product in real time.
It can be used for independent discharging testing, and it can also be used for full testing of connected ** products, and receiving materials in the form of coils.
It includes automatic feedback operations for the detected products, including laser marking of defective products, data generation and saving, and other automatic feedback operations.
The equipment adopts high precision camera accuracy, cooperates with flying standard operation, continuous detection operation, and does not need to stop marking operation. The working mode is flexible, the precision is high, the efficiency is high, and the application is strong.
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