In this two part blog series we will discuss the promise of embedded barcode reader options, considerations for successful implementation, and the latest trends with embedded scanners. We will start off by talking about what an embedded barcode reader does and how the type of data needed to collect will determine the type of scanner needed and what aspects of engineering must work harmoniously for successful implementation.
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Barcodes and the readers designed to decode them are a well-known, structured system of data collection. They are based on the idea of turning a printed pattern of information into a usable piece of data, and are widely used by most businesses in every corner of the globe.
Embedded barcode readers, as the name implies, are readers that are embedded within machines and kiosks. Unlike hand-held readers which are moved by hand to the barcode, embedded readers are typically in a fixed position and the barcode or object with a barcode on it, is moved to the reader. In the case of kiosks the object is typically presented by a person. For machines the barcoded object is typically automatically conveyed past the reader.
Embedded barcode readers combine mechanical components, electrical components, and software. These three aspects of engineering must operate properly and cooperate harmoniously in order to achieve a reliable and efficient reader. Successfully introducing embedded readers in a host application involves the indispensable stages of design and prototyping. The design stage of any embedded reader project is very important because it answers the most critical questions regarding its overall operation:
The amount of data ultimately determines whether a 1D (1-dimensional) or 2D (2-dimensional) barcode reader will be used. 2D labels contain more data than 1D labels and are therefore the route of choice for more complex applications. Let’s break down the difference between the two:
1D barcodes is the older of the two technologies. There are two types of 1D readers:
While barcode scanning technology has existed for more than 30 years, 2D barcodes have only found wide use in recent years. 2D readers are essentially digital cameras but with software that has the ability to “see” and decode the image. 2D readers are available in two basic configurations:
Every barcode scanning project has to take into account mechanical, electrical and optical aspects. The following are some important design elements to consider:
To conclude part 1 of this 2-part blog series, there are many things to consider when designing in an embedded barcode reader. Look for part 2 of this blog coming out next month where we discuss the latest trends with embedded scanners and the consequences of a bad reader choice.
Charles Fisher is Director of Sales of RESCO Electronics, a manufacturer of electronic assemblies and a value added reseller of auto ID equipment . Charles is a seasoned International Sales and Sales management professional with over 20 years in the electronics industry with extensive experience with Auto ID and data collection solutions, wire harness and electro-mechanical manufacturing, and supply chain solutions. During his career Charles has held positions with Milgray Electronics, Bell Industries, All American Semiconductor and Reptron Electronics.
Charles is a graduate of the William Penn Charter School and Saint Joseph’s University with a degree in International Relations. He currently resides in Maryland with his wife and 2 daughters.
In this article, we will delve into the fascinating world of barcode scanners, understanding their inner workings, and how they play a vital role in the modern business landscape. From retail to logistics, healthcare to manufacturing, barcode scanners have become an indispensable tool, streamlining processes and enhancing efficiency across industries. As experts in the field, we aim to provide you with a comprehensive guide to help you understand how barcode scanners work and why they are crucial for your business operations.
Barcode scanners may seem like a simple handheld device, but beneath their sleek exterior lies sophisticated technology that enables them to read and decipher barcodes with remarkable accuracy. At the core of every barcode scanner is an image sensor or a laser scanner, which acts as the primary mechanism to capture the barcode data.
1.1 Image Sensor-based Barcode Scanners
Image sensor-based barcode scanners use a camera or a sensor to capture an image of the barcode. The scanner then analyzes the pattern of black and white lines, converting them into digital information. This data is further processed by the scanner's internal processor to reveal the encoded information, which could be a product number, a serial number, or any other relevant data.
Image sensor-based scanners are widely used in various industries due to their versatility and ability to read barcodes from various surfaces, including paper, labels, and even electronic screens. They are particularly popular in retail environments, where quick and accurate scanning is crucial to maintaining a seamless checkout process.
1.2 Laser-based Barcode Scanners
Laser barcode scanners use a laser beam to read the barcode. The beam scans across the barcode, and as it reflects off the contrasting surfaces, the scanner's photodiode detects the changes in light intensity. This information is then converted into digital data, allowing the scanner to interpret the barcode's contents.
Laser scanners are known for their precision and ability to read barcodes from a distance, making them ideal for applications where scanning at a close range might be challenging. They are commonly used in warehouses and distribution centers, where inventory management relies heavily on efficient barcode scanning.
Before delving deeper into the working of barcode scanners, it's essential to understand the different types of barcodes commonly used today. Each type of barcode has its own specific format, encoding method, and application.
2.1 UPC (Universal Product Code)
UPC barcodes are widely recognized in the retail industry. They consist of black and white bars and are typically found on product packaging. UPC barcodes encode crucial information, such as the product's manufacturer and unique product identification number, enabling quick and accurate product lookups at the point of sale.
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2.2 QR (Quick Response) Codes
QR codes have gained immense popularity in recent years due to their ability to store large amounts of data, including URLs, contact information, and product details. Unlike traditional barcodes, QR codes are two-dimensional, resembling a square pattern of black modules arranged on a white background. They are widely used in marketing and advertising campaigns to provide customers with easy access to digital content.
2.3 Code 39
Code 39 barcodes are alphanumeric and are often used in industrial applications. They can encode uppercase letters, numbers, and a few special characters, making them suitable for labeling components and tracking inventory in manufacturing and logistics operations.
Now that we have a basic understanding of the technology and types of barcodes, let's dive into the step-by-step process of how barcode scanners work.
3.1 Scanning the Barcode
When a barcode scanner is directed towards a barcode, it emits either a laser or activates the image sensor to capture the barcode's image. As the scanner moves across the barcode or the barcode moves in front of the scanner, it reads the pattern of black and white bars.
3.2 Converting Light into Electrical Signal
For laser scanners, the photodiode within the scanner detects changes in light intensity as the laser beam reflects off the barcode's contrasting bars. In the case of image sensor-based scanners, the camera captures the image of the barcode, and the sensor converts the light information into an electrical signal.
3.3 Decoding the Barcode
Once the electrical signal is generated, the scanner's internal processor takes over. It analyzes the signal, decoding the pattern of bars into a binary code. This binary code represents the encoded information stored within the barcode.
3.4 Retrieving the Encoded Information
The decoded binary code is then matched with the appropriate database, where the corresponding information related to the barcode is stored. This database could be a local inventory system, a cloud-based server, or any other centralized data repository.
3.5 Displaying the Results
Finally, the barcode scanner presents the retrieved information on its display or sends it to a connected computer system, cash register, or mobile device, depending on the application.
4.1 Enhanced Efficiency and Accuracy
Barcode scanners significantly improve operational efficiency by reducing manual data entry errors. With barcode technology, businesses can expedite various processes, such as inventory management, order tracking, and asset tracking, leading to enhanced accuracy and productivity.
4.2 Time-Saving and Cost-Effective
By automating data capture and processing, barcode scanners save valuable time for employees and businesses. This automation also translates into cost savings in the long run, as it minimizes labor-intensive tasks and reduces the likelihood of errors.
4.3 Streamlined Inventory Management
Barcode scanners revolutionize inventory management by providing real-time data on stock levels and movement. This visibility enables businesses to optimize inventory levels, prevent stockouts, and improve supply chain management.
As technology continues to advance, the future of barcode scanning looks promising. Innovations such as 2D imaging, artificial intelligence integration, and augmented reality-based scanning hold the potential to take barcode scanning to new heights.
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