LSV-6200 Velocimeter Controller - Features

LSV-6200 Features

  • Fast, state-of-the-art signal processor
  • Maximum measurement rate about 2300/sec
  • On-line VFD display of velocity and length data simultaneously
  • English or Metric units can be configured via RS-232
  • Optional external large-size display unit connected via RS-422
  • Advanced internal diagnosis capability
  • Offset length compensation
  • Display of status messages and diagnosis results on the display
  • Advanced command set
  • Improved "Material Present" detection (optional)
  • Higher speed RS-232 front side: 115 kbit/sec; back side: 230 kbit/sec
  • Ethernet interface for direct network integration

 

LSV-6200 Signal Processor
The Doppler signal from the sensor head has a frequency directly proportional to the speed of the measured object. The new LSV-6200 Velocimeter Controller uses a high performance digital signal processor (DSP) to evaluate the Doppler signal by means of FFT analysis. Prior to calculating the FFT, Polytec’s Fast Burst Detector (FBD) circuit quickly identifies the Doppler frequency (i.e. speed) and immediately adjusts the internal A/D converter for optimum measurement accuracy (0.05 %).

Customers appreciate Polytec’s FBD when measuring accelerating surfaces, where the Doppler frequency is rapidly changing. Even when the material briefly moves out of the sensing area or the surface reflectivity goes to zero, the FBD enables the LSV-6200 controller to relock onto the surface speed within milli-seconds. Through either digital or analog interfaces, the LSV controller easily integrates with a production process. The LSV-6200 is fully programmable through either serial port or ethernet interface. It can accept commands from a process control system or be programmed by a notebook computer.

LSV-6200 Software
The LSV PC software runs under both Windows™ 2000 and XP operating systems. The software sets the scaling of the analog output, the number of encoder counts per length, trigger input characteristics, and other system/application setup configurations. All settings are stored in non-volatile memory. The software is capable of displaying real-time velocity (1024values/sec) and length data in an oscilloscope or chart recorder format.