Desing of additional check station with intelligent camera system.

Danisova, Nina ; Zvolensky, Radovan ; Velisek, Karol 等

1. INTRODUCTION

In these days is industrial manufacture still in progress. Industry is using except computer techniques and classical automation devices also flexible manufacturing frameworks. It is also effective to speak about possibility which will take manufacturing systems in the area of so called intelligent manufacturing systems. All subsystems of intelligent manufacturing systems are including machine intelligence elements. Using of such intelligent systems will lead to the labour elimination from the manufacturing system.

Basic in these kinds of intelligence in the manufacturing systems is so called monitoring, which allows scanning of own system stay and it also scan changing surrounding conditions.

Monitoring devices are using sensors which are places on the right places (machine frame, machine, tool, manipulating device), are scanning parameters, which are used are input data coming in the control system. Following to these data, can be realized some technological, manipulating of some helping process.

2. VISUAL SYSTEMS

One of many important changes placed in the automation research and mainly placed in the research of robotized systems of higher generations with higher adaptability and intelligence is using of visual systems. Sensors are used in the visualisation process. Sensors are realizing some functions of man senses such as vision or touch.

In real designs of manufacturing systems can be visualization mainly used for:

--objects sorting following to their typical marks

--stay monitoring of machines, tools and other devices

--automated industrial vehicle navigation

--automated control of surfaces, edges and dimensions

Visual systems working principle:

First working principle used in visual system working is scanning of optical information and ist modification for using with other electronic cameras. Picture frequency is nearly same as frequency used by ordinary televisions. In other one block is analog signal changed to the numerical signal. Format is organizing by controller and then it is sent in to the special memory placed in the computer. Digitalized picture, which is placed in the memory, is modificated following to the type and goals of various tasks. Intelligent and camera systems are mostly used in the visual systems (Liska 2002).

3. ADDITIONAL CHECK SENSORICAL STATION

Flexible manufacturing cell is placed at the department of manufacturing devices and systems.

Flexible manufacturing cell is realized from these subsystems.

1. Industrial robot with Cartesian workplace

2. Shelf storage system

Five working phases is integrated in the flexible manufacturing cell.

1. Storegeing (storageing of semi products, final products before its expedition)

2. Transport and manipulation (transport and manipulation with semi products and final products)

3. Manufacture (manufacturing of single semi products to the final product)

4. Assembly (assembly of single parts in to the one final product)

5. Expedition

Additional check station was designed, which will check all parts placed on the system pallet. Parts will be checked by rotary feeding unit placed on the shelf storage, which is putting pallets in to the working place of Cartesian robot (Velisek, Javorova, Zvolensky, Danisova & Kostal 2007).

Additional check station if verifying, if the part which is coming in to the working place is really that one which was needed. One of designed solutions, which is proper for solving of this task, is using of proper camera system. Used camera is the camera of DMK 21F04 type. (Fig.1).

[FIGURE 1 OMITTED]

Used camera is delivered without object glass. Each object glass is elected following to the working conditions, such as dimension of scanning chip, working distance between camera and scanned object, dimensions of scanned object. Leading parameter used for proper object glass designation is focal distance, which can be calculated following to the mentioned parameters. To reach full visual display of whole scanned object on the scanning chip, we have to choose focal distance which has smaller value as calculated focal distance. For camera of type DMK 21F04 and other given conditions is proper using of object glass with focal distance which has smaller value as 2,8mm. These conditions are correct for object glass of T 2314 FICS type.

Following to the more complicated way of camera control and parts database transcription by any new income of part in the working area of flexible manufacturing cell, is better when the camera will be controlled by main control computer. Designed camera is proper also for this condition (Whelan 2000).

By scanning with industrial camera is very important to ensure that all parts placed on the system pallet have to be placed in the same position. Other one condition is to ensure the same lights conditions. This can be realized by additional light, which is an optional part of industrial camera system, or this can be realized by external light, which need proper light inbound to the whight place.

After picture scanning is this picture send to the control computer. Picture will be worked and evaluated by help of algorithms. (Madarasz 2006).

4. INDUSTRIAL CAMERA PLACEMENT

Placement of industrial camera was designed on the frame of industrial robot. Camera will be placed on the front side, above to the input rotary table (Fig.2).

Camera will be bound to the metal holder. System pallet with scanned object will come to the viewing zone of industrial camera every time as the palled come in to the system.

Holding to the metal holder of industrial camera is at the (Fig.3). At the (Fig.4) are parameters used for object glass selection and at the (Fig.5) is Object glass T 2314 FICS-3 made by firm Computar

[FIGURE 2 OMITTED]

[FIGURE 3 OMITTED]

[FIGURE 4 OMITTED]

[FIGURE 5 OMITTED]

Camera will be place on the stationary, solid place, where also proper light conditions can be realized. Also proper scanning background has to be realized. Control of whole camera system will be realized by control program implemented in to the control computer of whole flexible manufacturing cell (Kostal & Velisek 2004).

5. CONCLUSION

Intelligent manufacturing systems can be considered as higher development degree of flexible manufacturing systems.

Each IVS is also composed of single subsystems such as technological, manipulating, transport and storageing subsystem. Each of these subsystems has to be equipped by elements of machine intelligence, which are giving some degree of intelligence to these subsystems.

This article was realized with help of grand tasks.

VEGA 1/3193/06 Multifunctional manufacturing and assembly cell.

6. REFERENCES

Kost'al, P. & Velisek, K. (2004). Flexible assembly systems, Proceedings of Comatech 2004,pp. 201-206, ISBN 83-920972-4-6, Protection of Mechanical Systems in the Mining Industry Against the impact of high Energy conference location, October 2004, ZINT, Ustron

Liska, O. (2002). Funkcie a vyvojove znaky monitorizacnych systemov. Transfer inovacii, No5., (2002)

Madarasz, L. (2006). Intelligent technologys and applications in complex systems, VTI SR, Bratislava, Kosice

Velisek, K.; Javorova, A.; Zvolensky, R.; Danisova, N & Kost al, P. (2007). Multifunctional manufacturing and assembly system, In: Development of Mechanical Engineering as a Tool for Enterprise Logistics Progress:Science Report Project CII-PL-0033-01-0506,

Whelan, P.(2000). Vision Systems Laboratory, Dublin city University, Dublin University of technologi, pp.(135-158), ISBN 83-89873-28-1, Poznan