New sensor technology in driving the development of rail transport

New sensor technology in driving the development of rail transport

With the rapid development of semiconductor technology, in a modern advanced city subway, light rail vehicles, traction control system and auxiliary power supply system, are used in the way VVVF VVVF inverter and the CVCF auxiliary power inverter. And Route AC - Straight - AC drive locomotive, as current sensors and voltage sensors are also used in the above-mentioned system, a large number of DC and AC loop, in order to achieve closed-loop control of the whole system.

However, the urban rail traffic on sensor technology to promote the biggest lies in wireless sensor network technology, infrared sensor technology, force sensors, gas sensors, speed sensors and photoelectric sensors and other new sensors, rather than current sensors and voltage sensors and other traditional sensor field. China Railway Electrification Survey Design & Research Institute Co., Ltd., deputy chief engineer, senior engineer and chief of international co-operation project management expert Wang pointed out that "in the metro area, with the ventilation and air conditioning-related, such as temperature and humidity and CO2 sensors, and prevent terrorism on a number of toxic gases sensors have a high demand and technological content. In the field of high-speed EMUs on the inside and closed the amount of monitoring and supply of oxygen, earthquake, speed monitoring, Hotbox testing, joints loose monitoring, monitoring and other related foreign body sensor demand is very high, these technologies are still evolving and incomplete. while the anti-theft robbed class sensors, such as broken glass, high-pressure chamber, incorrect access, and cable raiding sensors are very important. "WANG Shu-Hop further pointed out that these sensors and systems equipment and personal security are closely related.

In urban rail transit vehicles, air-conditioning systems often use sensors and electronic temperature control thermostat compatible. Multi-use electronic thermostat regulator, sensors for temperature detection, commonly used for thermocouple or thermistor sensors. In the guest room, because of people's breath, carbon dioxide (CO2) levels will increase, while increased to a certain concentration, can affect human health, the belongings of passengers in the car produced harmful gases also make the air inside the vehicle become polluted, requiring the world a fresh air to the car to a certain degree of replacement of the air, so the precise detection of the gas sensor becomes particularly important.

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