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 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 railTrafficPairs of 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 sensors. IronElectricalOf Investigation Design & Research Institute Co., Ltd., deputy chief engineer, senior engineer and International Project ManagementExpertWang pointed out that the co-operation, "in metro areas, with the ventilation and air conditioning-related, such as temperature and humidity and CO2 sensors, and prevent terrorism on a number of toxic gas sensors have a high demand and technological content. In high-speed EMUs areas, with the closed compartments, the amount of monitoring and oxygen supply, earthquakes, speed monitoring, HotboxDetectionConnecting parts of loose monitoring of foreign bodies and other related sensors to monitor the demand is very high, these technologies are still evolving and incomplete. TheAlarmGrab type sensors, such as broken glass, high-pressure chamber, incorrect access, and cable raiding sensors are very important. "Wang co-operation further pointed out that these sensors and systems equipment, and personalSafeAre closely related.
In urban rail transit vehicles, air-conditioning system, often used sensors andEMatched by the temperature control thermostat. 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.
没有评论:
发表评论