Automatic Fleet Management System
Nirdeshak is a GPS-based automatic fleet management system used for monitoring and controlling vehicles from a central station. The system gathers positioning information without any driver intervention. The information is sent automatically over a communication network to a central station.
Nirdeshak uses the differential global positioning system (GPS) satellites of the US for positioning information. GPS is a constellation of 24 satellites orbiting the earth at an altitude of 20,200 km. The satellite orbits ensure that four to six satellites always remain in line-of-sight, and can send navigational messages at all times to any point on earth.
Based on these navigation messages, GPS receivers mounted on vehicles can compute their position by the triangulation method, in three dimensions (latitude, longitude and altitude). The accuracy using a standalone GPS receiver is usually around 100 metres. Accuracy shoots up when a differential GPS receiver (DGPS) is used, as it eliminates major sources of error by applying differential corrections transmitted from a reference DGPS receiver.
The reference DGPS receiver is located at a known, surveyed location. It computes its own position from GPS satellites, compares the computed position with its known position, and transmits the corrections to mobile DGPS receivers over a radio network. The mobile receivers apply these corrections, and position data that is accurate up to 2-5 metres can be obtained.
System configuration
- Central control station: Computer running application software
- Network controller
- Nirdeshak: Mobile packet radio modem integrated with DGPS mounted in vehicles
- Communication media
Applications
- Mining sector
- Public safety services
- Transport sector
- Personal use
- Defence
Technical architecture, hardware and software platforms
Central control station
- Hardware
- Pentium III / IV PC with two serial ports
- Operating system
- Windows 95 / NT
Network controller
- Hardware
- 16-bit integrated multi-protocol controller at 16MHz, 256KB EProm, 64KB RAM, 256KB Flash, three RS-232 serial communication ports
Nirdeshak
- Hardware
- 16-bit integrated multi-protocol controller at 16MHz, 256KB EProm, 64KB RAM, 256KB Flash, three RS-232 ports and one RS485 serial communication port, 8-channel GPS receiver, 128 X 64 graphical LCD
Strengths
- Identifying and displaying the position or the location of the vehicle in real-time.
- Ease of decision-making
- Low operating cost
Experience
CMC has a dedicated communications group continuously working on support activities and enhancement of this product.
Indicative client list
- Andhra Pradesh Road Transport Corporation
- Delhi Transport Corporation
- Northern Coalfields Ltd
- Meghalaya Police
For further information please contact : info@cmcltd.com or call us on +91-22-6781 1000 / 01 / 02