Reliable data collection for tracking and identifying solar cell modules-EEWORLD

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Currently, the commonly used solar cell technologies include monocrystalline silicon solar cells and polycrystalline silicon thin-film solar cells. Production process: Monocrystalline silicon solar cells are made by connecting multiple solar cells together. Thin-film solar cells are made by coating a glass substrate with a thin film and cutting it into independent units with a laser, and then assembling these units into a solar photovoltaic module. Regardless of the process, the quality of each monomer will affect the overall performance of the solar module.

At each step of production, the performance of each individual cell or unit is measured and this information needs to be linked to the finished module. Each module can only be evaluated for meeting process requirements when it is close to completion.

When assembling finished solar cells, only through precise data collection can the accurate identification of component sources and component data be guaranteed.

For advanced production systems, it is an important requirement to track products and components using machine-readable markings. A unique coding system ensures that each production step of each component and the use of raw materials are orderly and controllable. Any changes in the production process or the use of raw materials can be easily identified. Direct Printing Method (DPM) ensures effective quality control and tracking of products throughout the production process.

In the production process of solar modules, QR codes are widely used because they can store larger amounts of data. The QR code is marked on the glass surface using laser marking, and the solar module can be tracked by reading the QR code information. Due to the low contrast between the code and the substrate, reading the code directly on the glass surface is a challenging task.

The MV440's flexible light source and lens selection as well as its powerful decoding capabilities make it an ideal choice for barcode reading in the solar production field.

The MV440 fixed-mount barcode reader provides highly flexible direct printing (DPM) reading capabilities, and can read 1D/2D codes and characters in different environments. Due to its rich communication connection methods, it can be easily integrated into existing or newly designed automation systems.

Typical applications of SIMATIC MV440 in solar energy production

Module production

Quality traceability

Batch Identification

On-site installation

Identification and tracking

Main Features

IP67 high protection level, compact and sturdy appearance, multiple optional parameters

– Resolution 640 x 480, 752 x 480 or 1024 x 768 pixels

– Optional "check" function

– Can be connected to external light source

High reading speed

– Special decoding algorithm "ID-Genius" (high read rate for low-contrast DPM direct codes)

– Up to 80 read operations per second

– Up to 14 teaching code types can be stored

–Multi-code simultaneous reading function (up to 50 codes can be decoded simultaneously in the same field of view)

Communication interface

– Direct connection to PROFINET

– Ethernet, RS232, programmable digital input/output interface

– PROFIBUS DP (via ASM series communication modules)

– MV420, MV440 and RFID reader can be connected to the same communication module at the same time

Automatic trigger

– Automatically record images without external triggering

Web-based user interface

– Can be easily debugged and run through programmable devices and computers with IE program and JAVA plug-in installed (no other special software is required)

– Rich control and monitoring functions

– Customizable user interface on SIMATIC WinCC flexible/WinCC

– Flexible diagnostic and logging functions

Reference address：Reliable data collection for tracking and identifying solar cell modules

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