Train navigation

Customer

Train manufacturer / operator or equipment supplier

Issue / Challenge

The growth of public transport and the number of automated trains are creating new demands and requirements. Acceleration measurement is to be used to optimise train navigation. An accurate measurement is required:

• When the train changes speed
• To calculate the fluctuations when passengers get on and off
• v
• v The solution must allow for an increase in the flow of trains in order to reduce the waiting time between each train, while ensuring the comfort and safety of passengers.

PM Instrumentation Solution

Jewell Instruments accelerometers meet these needs:

• Acceleration or deceleration monitoring and measurement
• Position measurement calculated by double integration of accelerometers
• Measurement of lateral accelerations
• Monitoring of active damping of train bogies The LCA, LSBC, LCI and LCF series are generally used for high-speed transport (metros, high-speed trains, etc.). Reliable and accurate, the** LSO and LCF series** have been used for many years.

Customer benefits

This accurate, continuous acceleration measurement enables the safe increase in production of automatic, driverless trains. The LCF-100... +/–1.0° to +/–90.0° and +/–0.01G to +/– 10G, full range < 0.02% nonlinearity high level +/–5 volt output less than 0.0001 volt noise and less than 0.01% repeatability and hysteresis micro radian resolution and DC response

Accelerometers typically sense changes in velocity and characterize output in G. Inclinometers sense change in angular position and the output is proportional to the sine of the tilt angle.

The LCA accelerometers accurately determine train position with mathematical double integration. The LSBC, LCA, LCI and LCF Series are used in rapid transit, metro and high-speed train systems throughout the world. Our accelerometers are crucial components in safety and control systems offering a safe, controlled ride by providing train acceleration, deceleration and position feedback information. The LSO and LCF Series have accurately and reliably sensed centripetal acceleration for railcar tilt control for many years throughout the world.