International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 11 Issue: 07 | July 2024
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p-ISSN: 2395-0072
Embedded IRIG Generator Using Beaglebone Polamraju Surya Karthikesh Student, Dept. of ECE, S V College of Engineering ---------------------------------------------------------------------***---------------------------------------------------------------------
Abstract – In recent days, every industry has expanded its
Binary Coded Decimal (BCD), Control Functions (CF) and Straight Binary Seconds (SBS).
roots into the space industry. The ongoing research in the industry has produced very promising results. Embedded IRIG Generator Using beagle bone is one of those advancements. Inter-range instrumentation group timecodes, commonly known as IRIG timecode, are standard formats for transferring timing information. IRIG-B is the most used time code for synchronizing various devices. It is mostly used to synchronize rocket launch sequences between the payload and ground control. The commercial IRIG Generators are quite expensive. Beaglebone is an opensource, low-cost computer board. It contains a CPU and two Programmable Real-Time Units (PRU). These PRUs can be used to generate high precision timing signals. So, by utilizing them we have produced IRIG-B time code with high precision and good stability. We were able to generate a PWM signal with IRIG-B timecode embedded in it. This PWM Signal can be used to synchronize various devices and applications including rocker launches.
Figure 1 : Single frame of IRIG-B Time Code Beaglebone black is a low-cost and high precision development board which can be used for generating various signals with high precision. With its ARM- Cortex A8 processor and unique Programmable Real-Time Units is ideally suited for applications which require precise timing signals and synchronization.
Key Words: IRIG, PWM, Beaglebone, CPU, PRU.
1.INTRODUCTION The growing complexity of industries such as aerospace, telemetry and broadcasting require devices with high precision at low cost. Many centuries have been spent by man for determination and measurement of time. Earliest references were the sun and the moon. (E.g.: Sundial). Invention of the Clock helped to process the methods of measuring and regulating time. The invention of the Time Code was a major step in this direction. Time Codes, which are in serial form, are used to transport time information from one point to another. Different time code formats have been developed over the years, by both commercial as well as military agencies. IRIG (Inter Range Instrumentation Group) codes have been in use for a long time in the industry. The commercial IRIG generators are quite costly and are not flexible enough. It is difficult to modify them for any custom applications.
By utilizing the beagle bone in these time code generators, we can build the device tailored for custom applications. This approach reduces the budget requirements of timing applications and improves the flexibility of the system.
2. HARDWARE The BeagleBone Black is a widely used single-board computer with low power consumption and highperformance hardware integration. It uses Texas Instruments Sitara AM3358BZCZ100 at 1GHz to meet the processing requirements of various tasks. ICH has 512MB DDRIII RAM and 4GB of onboard eMMC flash memory which are adequate for running applications and storing data. Networking includes a 10/100 Mbps Ethernet port, connectivity, USB 2. 0 host ports (2) for peripherals connectivity and an HDMI output port for display connectivity. The board contains 65 GPIO pins, seven analog inputs, and eight PWM outputs that allow for easy integration with other devices or processes in an external environment. Even more expansion capabilities are enabled by cape compatibility with Beaglebone and two
There are various versions of IRIG time codes, but IRIG-B time code is the most used in the industry. RIG-B consists of 100 bits produced every second, 74 bits of which contain various time, date, time changes and time quality information of the time signal. Consisting of logic ones, zeros and position identifier bits, the time code provides a reliable method of transmitting time to synchronize power equipment devices. There are three functional groups of bits in the IRIG-B time code:
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