With the rapid development of urban rail transit, the requirements for the safety performance and operation efficiency of rail transit system are also increasing. current sensor IKW75N60T As an important sensor equipment, it plays an important role in the rail transit industry. This article will introduce the principle, classification and specific application of current sensors in the rail transit industry
1、 Principle and classification of current sensors
Current sensor is a kind of sensor equipment used to measure current. It measures the current through the magnetic field generated by the induced current or by measuring the voltage generated when the current passes through the wire. According to different working principles, current sensors can be divided into electromagnetic current sensors, Hall effect current sensors, magnetoresistive current sensors, etc.
The electromagnetic current sensor uses the magnetic field generated when the current passes through the wire to induce the sensor and measure the current. Electromagnetic current sensor has high precision and wide measurement range, but it is relatively less used in the rail transit industry due to its complex structure, large volume and high price.
Hall effect current sensor uses the magnetic field generated by Hall element induced current to induce the sensor and measure the current. Hall effect current sensor is small in size and low in price. However, due to its narrow measurement range and relatively low accuracy, it is also relatively less used in the rail transit industry.
The magnetoresistive current sensor uses the voltage generated when the current passes through the wire to induce the sensor and measure the current. The magnetoresistive current sensor is small in size, low in price, wide in measurement range and high in precision, so it is widely used in the rail transit industry.
2、 Application of current sensor in rail transit industry
1. Rail transit power system monitoring
Rail transit power system is an important part of rail transit system. Effective monitoring and management of it can ensure the safety and reliability of rail transit system. The current sensor can be used to monitor the current situation of each link in the rail transit power system, such as the current sensing in the power supply system, the current sensing in the traction system, etc., so as to detect abnormal conditions in time and take corresponding measures to ensure the normal operation of the rail transit system.
2. Condition monitoring of rail transit vehicles
Monitoring the status of rail transit vehicles is very important to ensure the safety and operation efficiency of vehicles. The current sensor can be used to monitor the current of each circuit in the rail transit vehicle, such as the current of traction motor, the current of vehicle lighting circuit, etc., so as to judge whether the vehicle operates normally, whether there are faults, and timely repair and maintenance.
3. Rail transit signal system monitoring
Rail transit signal system is one of the key systems to ensure the operation safety of rail transit system. The current sensor can be used to monitor the current situation of each circuit in the rail transit signal system, such as the current of the signal lamp circuit, the current of the signal equipment circuit, etc., so as to judge whether the signal system works normally, whether there is a fault, and timely repair and maintenance.
4. Rail transit fault diagnosis
Fault diagnosis in rail transit system is very important to ensure the safety and operation efficiency of the system. The current sensor can be used to monitor the current situation of each equipment in the rail transit system, such as the current of the motor, the current of the power supply equipment, etc., so as to judge whether there is a fault in the equipment, and to conduct fault diagnosis and maintenance in a timely manner.
5. Rail transit energy consumption monitoring
The energy consumption monitoring of rail transit system is of great significance for saving energy and reducing operating costs. The current sensor can be used to monitor the current consumption of each equipment in the rail transit system, so as to analyze the energy utilization, optimize the system operation strategy, and achieve energy conservation and management.
In a word, current sensor has important application value in rail transit industry. Through the monitoring of rail transit power system, vehicle status, signal system, fault diagnosis and energy consumption, current sensors can provide timely and accurate data support, and provide strong support for the safe operation and optimal management of rail transit system. With the continuous development of rail transit industry, the application of current sensors will also be constantly promoted and improved.
