Embedded Files
Flight Data Acquisition / Analysis System (FDAAS)
Flight Data Acquisition / Analysis System (FDAAS)
The VASAVI FDAAS is a Platform Independent System and can be run on Linux, Windows or MacOS. The default implementation is for LINUX Operating System.
The FDAAS is used to acquire data from Flight Data Recorders. The acquired data can then be analyzed for Flight Parameters, Engine Performance Parameters, Event recordings and Health parameters.
Graphical as well as Tabular reports are generated. The reports can be printed to obtain hard copies.
The Acquisition hardware is a Custom Embedded system with options to connect to tape as well as digital recorders.
The Analysis software runs on a rugged laptop.
The entire system is fitted into a rugged, weather proof, shock resistant transit case The transit case can be placed on a light weight trolley, allowing the system to be easily transported in the field.
The trolley is foldable.
Antenna Performance Measurement Systems
Antenna Performance Measurement Systems
RF Measurement Unit
RF Measurement Unit
The Antenna Performance Measurement Systems consist of Custom Built Antenna Hoods, which are anechoic chambers having input ports for injecting signals / output ports for measurement.
The signals are fed into a Measurement unit, which can perform RF Power and Frequency measurements.
Pulsed as well as CW signals can be measured.
The measurement unit allows the operator to select one of two signal paths to be measured.
The measurement unit measures Frequency by passing the signal through a fixed Frequency Divider followed by a programmable divider. The frequency signal is then fed to High speed Counter circuits which are captured at precise time intervals to provide a measurement of the Input Frequency.
Measurement of Frequency of a Pulsed signal uses a measurement of the width of the pulse which is combined with the frequency count to extract the input frequency.
Signal power is measured by High speed RF power detectors and sample/hold circuits.
A high performance Microcontroller controls the operations of the individual circuit elements including the High speed A/D converters.
A secondary controller handles the operator interface and the display functions.
Antenna Testing Hoods
Antenna Control Unit
Antenna Control Unit
The PRAVAK Antenna Control Unit, ACU-7134, is a Satellite Tracking Antenna Controller. It can be operated in Manual or Automatic modes. It supports three axis control for Azimuth, Elevation and Polarisation axes.
Automatic modes include Target Tracking, Program Tracking, Step Tracking, and Intelsat Tracking.
The ACU is a multiprocessor system, and accepts position signals from resolvers. It also accepts a high level voltage signal from a RF receiver for positioning the antenna to achieve the highest signal strength.
Robot Crawler
Robot Crawler
The Robot Crawler has eight legs and each leg has three degrees of freedom.
In addition to the three degrees of freedom, each leg is equipped with suction pads to allow it to adhere to a surface which may be inclined or curved.
The Crawler is eminently flexible and articulate, and can shrink itself, raise its height, move sideways, and rotate its legs with respect to each other.
The suction pads allow the crawler to even crawl upside down.
The Crawler was designed to be able move through insides and outsides of curved pipes with cylindrical or tapering cross-sections.
The Crawler is controlled by an onboard computer which communicates with a Master Computer. Commands are transmitted using a tether cable or wirelessly. The Crawler can carry a payload of 500 gms and was designed for Ultrasonic Non Destructive testing.
Programmable Sector Blanking Module
Programmable Sector Blanking Module
The Sector Blanking Modules is a 19" rack mountable, microcontroller based Blanking Signal generator. It accepts pulse signals from the azimuth encoder, and a sync signal to mark the North position.
Three sectors can be programmed using Thumbwheel switches to define Start and End positions of the sector.
Whenever the antenna position is within the sector limits, a Blanking output is generated.
Individual sectors may be turned on/off from front panel switches.
Thermal Conductivity Apparatus
Thermal Conductivity Apparatus
The PRAVAK Thermal Conductivity Measurement Apparatus is used to measure the Thermal Conductivity of Highly Thermally Opaque materials having poor thermal conductivity.
Examples of materials include Bamboo and Wood based composites as well as Carbon fibre composites.
Two versions of the Apparatus are available based on different ASTM Standards. One version performs relative measurements using the Longitudinal Guarded Ring technique, while the second version performs absolute measurement using the Guarded Hot Plate technique.
The carefully constructed apparatus use specially designed precision temperature sensors, and a sophisticated Instrument Amplifier based temperature measurement system with Cold junction compensation.
Heat input is controlled and metered by measuring the power applied to the heaters embedded in the hot plates.
An embedded computer system controls the operating cycle of the apparatus and transmits the data to a PC for recording, analysis & display.
Digital Solid State Photo Readout Device
Digital Solid State Photo Readout Device
The Digital Solid State Photo Readout Device was developed as a replacement of an optical punched tape reader. The original Punched Tape reader was the input device of a legacy computer.
The Solid State Photo Readout device emulated the complete functionality of the original equipment, except that there were no moving parts. The emulation was implemented as a software running on an Embedded computer system, which accepted the control signals of the CPU and provided data in a manner identical to the original tape reader unit.
The contents of the punched tape were transcribed and stored into the secondary memory of the Embedded Computer System. All tape motions such as Forward / Back / Manual Step / Single Step / Auto / Search were implemented.
The User did not have to load different punched tapes. Instead the tape to be run was selected through a thumb wheel switch on the front panel.
Polyphase Energy Meters
Polyphase Energy Meters
PRAVAK provides technical services for the Hardware/Software Design & Development of Polyphase Energy Metering solutions.
Current designs are available for Class 1 Three Phase Meters, with measurement of Active, Reactive and Apparent powers as well as the associated Energy Counters.
Bidirectional designs are available for use in Net metering.
The metering system is built around Industry Standard platforms.
In addition to basic metering functions, the application permits recording of fault conditions, attempts to tamper, as well as periodic logs of parameters on short intervals of (15, 30, 60) minutes duration as well as daily logs.
The meters can store data for upto 100 days, and billing data for upto 12 months.
Communication with the meter is performed using the DLMS protocol. Through the use of RF modems, data may be acquired through wireless networks.
and more ...
and more ...
Page updated
Report abuse