Lift Display System

          With the increase in customer expectations and requirements it has become essential to provide more information to the lift passengers either to make their travel easier or for the service provider to make use of the precious time of the passengers in promoting a company , product or service.

There are two units in this system.

  • Lift Information Interface (LII) - collects digital data corresponding to the car position, movement and other informations like overload, lift under maintenance etc., from the machine controller and sends it to the Display Module Interface (DMI) along with the time and date.
  • Display Module Interface. (DMI) - consists of 320 x 240 pixels LCD on which the floor number, Time, Date, room temperature and other messages like overload, lift under maintenance etc., along with the symbols will be displayed. DMI will be placed in each landing and inside the lift.

  Metering Indication Module

            The MIM Module is designed to show 12 different parameters of an inverter used for induction heating by switching 75 KW of power at 10 KHz. The MIM module also monitors the input power parameters and gives out Trip signal to the inverter if the input power is abnormal. MIM provides for controlling the inverter through the feather touch keys. It also houses an indication panel of 16 indicators to show the status of inverter. An LCD module of 320x240 pixels is made use of to display the measured parameters of inverter.   
The module is designed to carryout the following functionalities.

  • Provide for human interface through the seven feather touch keys to control the inverter.
  • Monitor the three phase input parameters, display the parameters on the LCD screen, provide for a signal to trip the system if the input power is not as per predefined norms.
  • Get interfaced with the inverter, control electronics to read the output parameters and display those on LCD
  • Monitor circuit breakers and indicate the trip condition.
  • Get interfaced with control electronics of the inverter to sense digital signals and accordingly control the corresponding indicators on the front panel and LCD.


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  MMI for VFD

             Smart LCD Printer Controller is designed to receive information from an RS232 Port [Drive port] and store it in a circular buffer memory, which can hold 128 Blocks of data(samples). Each and every block of data is also date and time stamped with the help of an on board RTC. The latest sample is displayed on an LCD display of 320 x 240 characters. The display can be scrolled “UP” and “DOWN” with the help of front panel keys to view any sample in the circular buffer. Pressing “PRINT” key on the front panel can print the sample displayed on the LCD screen. Thus it is possible to select any desired data to be printed or simply viewed. One serial port (Printer port) is used for printer interface. The memory is non-volatile so that the data is retained even after the power goes off.

       SLPC can also communicate to a centralized controller through another RS232 Port (Console port). In this case the SLPC acts like an addressed slave and supplies information or executes commands of the centralized controller, which can be a PC. Alternatively the Unit can be configured to simply send whatever information it receives on the VFD port on to this Console port apart from storing in the buffer and putting on the display and printing.  

  Tactical Communication System for Combat Flight Stimulator

          The pilots of combat aircraft are trained using Flight Stimulators. To create a real environment it is a need to establish voice link amoung trainee, instructors, master controller etc. Along with voice other external sounds like Engine sound, noise, music etc has to be mixed to bring out real environment. The system is provided with following features

  • Six voice channels for communication.
  • Audio mixer for Aural cue wave files generated by a computer.
  • External engine sound, cracking ,hissing, song etc, sound simulation.
  •   G Dim effect for the trainees.
  • Recording output for sound recording to be replayed in debrefing sessions.

  RTX2010 Emulator

          HS RTX2010 is a 16bit stack based microcontroller designed to be radiation-hardened to suit Space applications where very high speed control tasks are to be performed.

The Emulator for this processor which was not available has been designed for ISRO. Presently this emulator is used by several divisions of ISRO all over India.

Some of the features of this emulator are as follows.

  • Single step execution with status reporting on all registers. Break on various conditions like : Instruction fetch at an address, I/O activity, Memory Read, Memory Write, Interrupt and also asynchronous Break.
  • Counting of Time elapsed while executing a routine in number of clock states.
  • Map memory of 64K bytes.
  • Trace memory of 64K cycles.
  • Download / upload of programs from / to the disk. Editing of user memory.
  • Disassembler to list out RTX2010 Mnemonics.    

  Auto Fire Suppression System (AFSS)

       The Auto Fire Suppression System consists of following components.

  • Electronic Control Panel
  • Sensor Cable
  • N2 Cylinder
  • DCP Cylinder
  • Hoses
     The system makes use of the sensor cable which has a pair of wires and will be run all around fire prone areas. In the event of this cable experiencing a temperature more than a certain value, this pair of wire gets short circuited which will be otherwise insulated from each other. It is this shorting sensed by the control panel to detect fire.

     The system also makes use of two cylinders viz, DCP cylinder and N2 cylinder which are at different pressures and mounted with pressure switches for monitoring adequate pressure maintenance. The N2 Cylinder includes a squib which houses a heating element of about 2.2 ohms. The control panel will send about 5 amperes of current through this heating element for the squib to explode and release the valve of N2 Cylinder.

     The DCP cylinder contains dry chemical extinguishing agent . When N2 cylinder valve is opened, the Nitrogen gas pressurizes and fluidizes the dry chemical extinguishing agent which is then discharged through hydraulic hoses to fixed nozzles and into the fire areas.

  Smart Weld Thermocouple Attachment Unit

             SMART WELD - TAU 1.0 is designed to weld thermocouple wires on to a weld substrate by capacitance discharge action .It is made to be portable by adding a rechargeable lead acid battery with an in built battery charger circuit operating on 230 VAC, 50 HZ. There are two electrodes emerging out of the unit, one of which is fitted with a magnet to be attached to the substrate and the other one is fitted with a application pliers to be used for holding thermocouple wire. The power control switch is used to turn the system ON/OFF. The system allows for setting energy levels (depending on the thermocouple wire thickness), for starting the capacitance charge circuit, for initializing weld operation and for configuring it into AUTO/MANUAL mode through feather tough keys. Also included on the front panel are several LED indicators showing the status of the system and two digit seven segment display to show charge Voltage/Energy level.

  Multifunctional Vehicle Data Recorder ( MFDR )

             This is an LCD based Data Acquisition system for real time scanning of critical vehicle parameters for the purpose of data logging , audio visual warning and to assist vehicle maintenance scheduling. The system accepts On / Off and analog signals from electromechanical switches and sensors fitted on the equipment subsystems. It will log real time data to provide enhanced diagnostic message. The logged data can be retrieved later to study equipment history for failure analysis. The four keys provided on the front panel are used to operate certain basic functions like display equipment parameter, set limits, modify calibration table etc. A 320 x 240 pixels LCD on the front panel displays the warning symbols of the parameter, operating hour of the vehicle, vehicle speed in digital format and warning messages.  

  TM/TC Simulator for Satellites

         Emulates all the Telecommand signals emerging from the onboard Telecommand system and to provide a means for the testing personnel to generate these commands. 

Interfaced to the Telemetry Signals of the subsystem and presenting it for the test personnel to view and arrive at conclusions.

 It consists of four  modules :

Mother Board – to facilitate interconnection among modules and to route power . ii.

Telemetry Module - Accepts 11 Digital inputs, 33 RF bits , 20 Analog inputs and 11 Thermistor inputs.

TeleCommand Module – Generates 18 Low Level pulse commands, 19 High Level Pulse commands, 4 High Level Commands and 4 Data Commands

Front End Controller – To collect telemetry information of all the TM modules and transmit to Local PC on demand. To accept command from Local PC and route it to the corresponding TC Module to generate proper command.

           The system consist 1 mother board 20 telemetry modules, 20 telecommand modules, 1 frontend controller, 2 power supply units and a PC loaded with inhouse developed software modules.

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