RAIL WEIGH BRIDGES:

IN MOTION RAIL WEIGH BRIDGE

In-motion Weighing System overcomes many of the limitations inherent of conventional static weighing systems by being able to weigh wagons on the move.
The state of art highly sophisticated yet simple in-motion weighing system has been designed and developed indigenously. With conventional systems, each wagon has to be uncoupled from those adjacent to it, and then carefully positioned and parked on the weighbridge before its weight can be recorded.
Digital intelligent, innovative system is designed to detect the different type of wagons to initiate the axle or bogie weighing. Also it automatically detects the different type of engines and eliminates its Weighment. The speed of wagon is directly related to the accuracy of weighment. The high speed A/D Micro Controller are having a remarkable compatibility to achieve accurate weighment even up to a speed of *15KM/hr.

TRACK REQUIREMENTS BRIDGE
The Micro-controller based menu driven Electronic Digital Weight Indicator designed for high performance industrial weighing applications. In this the user selects the operating functions appropriate to his application requirements. The weighing system offers the following features:
For getting optimum accuracy, the following track conditions are recommended.

• Approximate 100Mtrs straight track either side of the Weighbridge.
• The track at both end of the weigh bridge of 100 Mtrs desired to be level tangent with gradient not exceeding "1 in 300"
• Points or crossings up to a distance of about 100 Mtrs of Both end of the Weighbridge are needed to be avoided.
• Concrete sleepers upto 100 mtrs & RCC Base atleast 20 Mtrs on either side of the track should be well ballastic and settled at both end.
• Non Weighing speed should not be more than 25 kmp.

SYSTEM OVERVIEW
The load cell based in-motion weighing system consisting of 4 load cells, weighbridge with prefabricated supporting structure and rail approaches. The load cells are strain gauge based sensors, which convert weight in to electrical signal with very high accuracy and stability. Wagon movement on the weighbridge is identified by Track Switches placed on either side of bridges, to detect the direction, type of wagon, start and stop weighment.

The approach Rails are rigidly tightened with approach beams to restrict the rail movement and smooth load transfer to the weighbridge. The misalignment of approach rails and weigh rail may induce errors in accuracy