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Speed Recorder

Laxven Speed Recorders are designed to provide a reliable and accurate record of speed, time and distance parameters of a locomotive on which it is mounted. They can be powered from the DC voltage available in the locomotive. They are suitable for voltage variations between 50 -140 V and is thus fit for application on all Indian Railway dc/ac Electrical multiple Locomotives. The speed recording system produces a record of speed Vs distance, Speed Vs Time, etc. traveled by the locomotive on a Non Volatile Memory at two places for higher redundancy for any post-incident analysis. The system also provides digital display of various parameters and sounds audio-visual alarms on exceeding set speed limits and certain malfunctions of the system. There are two driver cabs on the locomotive. One side of the driver cab is fitted with Microcontroller based Speed Recorder cum Indicator and the other side of the driver cab is fitted with Micro controller based speed Indicator only. The communication between these two units is through RS 485 communication protocol. These two units are provided with the LCD display and alphanumeric keypad for entering the driver and locomotive parameters. There are few warning LED’s along with audible alarm, which alert the driver on deviating some of the specified parameters. Special features (Optional) like open-collector outputs for speed, distance parameters, are available which are programmable through key pad.

 

Speed Recorder EME

Speed Recorder EME

 

Laxven is one of the leading manufacturers of the microcontroller based Speed Recorder for Indian Railways. Laxven has developed different models of speed recorders to meet the RDSO specifications. Laxven has also developed the test equipment and calibration tools to calibrate the Microcontroller based speed recorders at the workshop as well as in the Locomotive.

 

LAX-312, LAX-2000D,LAX-2000D3 and LAX-2000D8 are the few models available for application on the Diesel Locomotives.

 

LAX-312 is a strip chart based speed recorder.

 

LAX-2000D is a Microcontroller based speed Recorder cum Indicator unit with the memory capacity of 8 Hours of 1 sec data and 45 days of 20 sec interval data in a circular form First – in – Last out on a PCMCIA Card. The data can be downloaded through a RS 232 serial port from a memory reader unit.

 

LAX 2000-D3 is also Microcontroller based speed Recorder cum Indicator unit with a memory capacity of 12 hours of 1 sec interval data and 90 days of 20 sec Interval data in a circular form (First –in- last out) on a Compact flash card.

 

LAX 2000-D8 is the latest model, which is also Microcontroller based speed Recorder cum Indicator unit with Pen Drive and USB Facility. The system is capable of recording data of last 12 hours of 1 sec interval data and 120 days of 20 sec Interval data in a circular form (First –in- last out) on a Compact flash card.

  • Highly Accurate, stable and reliable Microcontroller based System
  • Less Maintenance and long reliability
  • Self diagnostic and fail safe Microcontroller based System
  • More than 1200 systems working in Indian Railways
  • Power supply can work from 50V to 140V DC and can be used on any Indian railway locomotive. (24V DC supplied as per customer requirement)
  • Switch mode power supply provided with built in protection for Reverse Polarity, Input Over Voltage, Over Current and Short Circuit. High capacity filters provided for Surge/Transient suppression and EMI/EMC suppression.
  • Data is recorded in a non-volatile memory at two places for redundancy.
  • Industrial grade compact flash card used for memory recording
  • 12 hours data recording @ 1 second interval and 120 days recording @ 20 second interval.
  • All the inputs, outputs, internal faults are recorded in the data with date and time stamp for post analysis.
  • Auto change over redundant sensors for speed measurement
  • Seven digit odometer with a resolution of 1 km/h
  • User configurable parameter entry through keypad.
  • A 16X2 alpha numeric LCD with backlit provided for display of various parameters
  • Rugged, polarized MS circular connectors provided for higher reliability
  • Available in Desktop and wall mount versions.
  • Wheel diameter adjustment through keypad (resolution of 1mm)
  • Two digital inputs provided for dynamic braking and tractive effort sensing
  • Provision of additional digital inputs/outputs can be incorporated as per customer requirement
  • Downloading of data using USB, Pen Drive and Compact flash card.
  • User friendly and powerful Analysis software for post analysis of data
  • Recorded data can be viewed in graphical or digital form using Analysis software
  • Graphical data can be viewed as Speed Vs Distance or Speed Vs Time.
  • Driver wise, Train wise, distance wise bench mark report generation/analysis etc. provided in the software.
  • Over speeding analysis provided in analysis software.
  • Downloaded data can be converted to Excel file format
Power Supply voltage : 50 to 140 V DC  from loco battery (24 VDC available as per customer requirement)
Power : Less than 12 Watts
Accuracy of Speed : 0.8 % of the full scale
Speed Dial : 0-160 Km/h or as per customer requirement in 240 degrees
Odometer : 7 digit with 1 km resolution. Accuracy: 0.1 %
Speed Measurement : Through Auto change over redundant speed sensors
Recording System : At two places using Industrial grade compact flash card
Resolution of
Recording		 : 1 second for fine data for the last 12 hours of  run and 20 seconds for coarse data for the last 120 days (run and halt)
Display : 2 x 16 character LCD display with backlit control
Display parameters : Time, Date, Distance, Dynamic braking, Tractive Effort parameters etc.
Temperature range : -5 deg. C to + 80 deg. C
Data Entry : Through 16 key rugged tactile alpha numeric keypad
Dial Illumination : Adjustable through Keypad. 0 to 100 %
Wheel diameter
setting		 : Adjustable through keypad. 640mm – 1220 mm or as per customer requirement
Digital Inputs : 2 Numbers of 72V DC digital input (Optically isolated and reverse polarity protected). Can be expanded as  per  
   customer requirement (Optional)
Digital Outputs
(Optional) 		: Can be provided as per customer requirement.
Downloading of
Recorded Data		 : Data can be downloaded to PC using USB, Pen Drive or Compact Flash card
Approximate weight : Recorder cum Indicator unit  < 3 Kg  Indicator unit  < 2.5 Kg
Analysis Software : Windows based Powerful and user friendly software

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