How A QR Code Scanning Sensor Works - GM77 Barcode and QR Code Scanning Module - 15m/min - SEN0512

Description:
In this video, we will talk about the GM77 QR Code Scanning Sensor and how it works. This is a QR Code Scanning Sensor introduced by DFRobot. It can read bar codes or QR codes with a scan speed of 15m/min. The sensor has a small size and high-efficiency recognition and can be easily integrated into various industrial equipment and applications.
GM77 Barcode and QR Code Scanning Module ►www.dfrobot.com/product-2480....
Subscribe ► ua-cam.com/users/DFROBOTCN?s...
***************************************
Additional Product Resources:
CO Sensor (SEN0466) ► • How An Electrochemical...
O2 Sensor (SEN0465) ► • How An Electrochemical...
Gesture Sensor (SEN0187) ► • We've Got A New Toy! -...
Analog Turbidity Sensor (SEN0189) ► • We've Got A New Toy! -...
Digital Microwave Sensor (SEN0192) ► • We've Got A New Toy! -...
AD8232 Analog Heart Rate Sensor/Single Lead ECG Sensor For Arduino ►
• AD8232 Analogl Heart R...
Gravity Series ►
• Gravity Series
Product Showroom ►
• Product Showroom
Project Showroom ►
• Project Showroom
***************************************
This scanner reads barcodes or 2D codes with a scan speed of 15m/min. With its small size and high-efficiency recognition, it is easy to be integrated into various industrial equipment and applications.
The module is equipped with a 0.3megapixel camera and auxiliary lights, white light illumination, and red light focusing, which makes it able to effectively identify codes in low-light environments.
The module automatically senses and scans, identifying the surrounding environment. Once auto-triggered, it quickly recognizes and reads code. The scanner also has TTL-232 and USB two communication interfaces for more actual scenarios.
Timestamps:
Features 00:00
Specification 00:25
How A QR Code Scanning Sensor Works 00:46
Demo 03:23
Subscribe ► ua-cam.com/users/DFROBOTCN?s...
Homepage ► www.dfrobot.com
Facebook ► / dfrobot
Twitter ► / dfrobotcn
Instagram ► / dfrobot_official
LinkedIn ► / dfrobot

[@sevm7792]

That qr code explanation there was probably the absolute best in regards to the time it took.

[@AdityaMehendale]

Nice overview :)
Questions from an engineer, as usual:
1) What's the active power-consumption?
2) What processing time is needed in an ideal situation? (perpendicular view, oriented code, sufficient lighting, large code)
3) Is this different than a "worst-case" situation? (small code, tilted & skewed code, poor lighting, gradient-lighting)
4) Are there situations where the sensing system shall perform unpredictably? (e.g. when _two_ QR-codes are simultaneously visible to the camera)
5) Is there a typical "depth of focus"? Can the code be placed at any distance, as long as the solid-angle subtended by the code at the camera is more than xyz steradian?
Thanks!

[@DFROBOTCN]

Good questions :D
1) The active power consumption is about 0.9W according to the preliminary test.
2) Based on the information provided by the manufacturer, 50ms is needed to process in an ideal situation (perpendicular view, oriented code, sufficient lighting, large code).
3) Yes, factors like small code, tilted & skewed code, poor lighting and gradient-lighting will affect the processing time, but it will not be over 150ms.
4) Generally, the module performs predictably as long as the distance is rational and the code is correct. According to the test, it will decode the one that is easier to recognize in the FoV based on the algorithm when two QR codes are simultaneously visible to the camera.
5) The best distance between the camera and the code is 10-45cm, at which the code is clear to the camera.
Thanks for your continued support.

[@AdityaMehendale]

@@DFROBOTCN Thanks!

[@PrashantKumar-qp4er]

How can you have white LED when there is no such thing as white light? Do you know if lasers are at all involved in QR code scanners? I am concerned about the bright red light shining in my eyes from inappropriately placed QR code scanners with bright red lights. I would NEVER place them like that like shining straight into the customers' eyes but I am a customer and the employees place them facing straight into our eyes instead of pointing them downwards.

[@AdityaMehendale]

@@PrashantKumar-qp4er (1)fluorescence. (2) usually not; camera instead of bit-stream (3) Too bad - you should bring it to their attention

[@mecatx]

We use QE codes for reports/info on a microscope slide . also to gibe code commands to drones.

[@rocketscn]

the microscope slide is a good example

[@PrashantKumar-qp4er]

How can you have white LED when there is no such thing as white light? Do you know if lasers are at all involved in QR code scanners? I am concerned about the bright red light shining in my eyes from inappropriately placed QR code scanners with bright red lights. I would NEVER place them like that like shining straight into the customers' eyes but I am a customer and the employees place them facing straight into our eyes instead of pointing them downwards.

[@mecatx]

We also use the barcodes of the serial number on the boxes as we get new Tellos to bui9ld our inventory of the drones in Excel spreadsheet.

[@reneechipman1581]

I am curious about the way the reader works and like seeing that Galois Theory is applied in this process.

[@idarisoftsa]

if can buy into amazon???

[@tpobrienjr]

Membership cards, ID badges.