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Sensors Everywhere

From Liquid Level to Metal Part Assembly Inspection with Vision Sensors

The SC Series Vision Sensor is featured with rich built-in vision tools for diversified inspections, integrated lens and light, and a web-based HMI to improve user experience.

Bild: Hangzhou Hikvision Digital Technology Co., LtdBild: Hangzhou Hikvision Digital Technology Co., Ltd
Image 1 | Metal Part Assembly Inspection with the new SC Series Vision Sensor

To find out what improvements the SC Vision Sensors makes we show some actual application cases.

Bild: Hangzhou Hikvision Digital Technology Co., LtdBild: Hangzhou Hikvision Digital Technology Co., Ltd
Image 3 | Printing Characters Presence Inspection

Inspection of Metal Part Assembly

In automotive industry, numerous metal parts need to be assembled. These parts are usually very small, transported in high speed on the conveyor belt. In addition, one line is assigned to multiple types of parts and the shift is quite frequent. Consequently, errors occur. To sort out the defective parts, an error-proofing inspection is required. The vision sensor has a built-in vision tool to measure the light intensity of multiple points in the FOV. All that needed is to turn on the integrated front light. By checking the light intensity of predefined positions and calculating the illuminated area, the vision sensor is able to determine whether the metal part is correctly mounted or not. Only one vision sensor is needed in the whole inspection process, and the final result OK/NG can be sent to the action part or PLC directly.

Bild: Hangzhou Hikvision Intelligent  Technology Co., LtBild: Hangzhou Hikvision Intelligent Technology Co., Lt

Steel Inspection

A steel manufacturer needs to sort steels during the molding process to guarantee that different steels are sent to corresponding machines correctly. Besides, before sending steels into punching machine, it is also required to check the position to ensure that it could be shaped in the punching machine accurately. The accuracy is in centimeter-level. The vision sensor can record the marking or pattern on the steel surface as a feature, and differentiate steel types and calculate the positions and angles by comparing the recorded features. Moreover, the built-in edge detection vision tool allows to measure the distance and angle between the two ends of a steel, to check whether it is identical to the mold. The inspection result can be sent to the upper computer via multiple transmission methods such as Serial port, I/O, TCP or UDP.

Bild: Hangzhou Hikvision Intelligent  Technology Co., LtBild: Hangzhou Hikvision Intelligent Technology Co., Lt

Bild: Hangzhou Hikvision Intelligent  Technology Co., LtBild: Hangzhou Hikvision Intelligent Technology Co., Lt

LED Inspection

A power bank manufacturer needs to inspect LEDs on the power bank. Before, many integrators prefer to use color mark sensors to check multiple predefined positions on the power bank one by one, to see whether there is LED blinking. Then, all the results needed to be integrated with a PLC. With the built-in vision tools and logic tools, the vision sensor is able to check the light intensity of all positions at one shot. Then all the check results of different positions are integrated automatically. Only one OK/NG signal will be output to indicate if the power bank is defective or not.

Bild: Hangzhou Hikvision Digital Technology Co., LtdBild: Hangzhou Hikvision Digital Technology Co., Ltd
Bild 1b

Liquid Level Inspection

A bottled mineral water manufacturer has recently introduced SC series vision sensors into its production lines for liquid level inspection. In the inspection spot, an area light panel is placed at back of the bottle, and the vision sensor is fixed in front of the bottle. The edge detection vision tool is used to measure the distance between the liquid level and the bottle cap. By virtue of its 60fps frame rate, the vision sensor needs only a back light panel that is slightly bigger than the bottle.

Printing Characters Presence Inspection

At the end of production, a thorough inspection is performed on the packaging of each product before they are finally packed in batch. Among many inspection items, the inspection of production date is a key item. After testing, it is confirmed that the surface with printing characters has an obvious contrast difference comparing to that without printing characters. The SC series vision sensor provides contrast measurement function, which realizes the presence/absence detection of the production date in the simplest way. In the future, we believe that more new technologies, like 5G and AI, will be integrated to machine vision products, including vision sensor and other smart cameras. The vision sensor will become smaller, more powerful and easier to use.

Hangzhou Hikvision Intelligent Technology Co., Lt

Dieser Artikel erschien in inVISION 5 2019 - 27.09.19.
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