A long range active response loop wire set
A technology of action distance and loop line, applied in the field of railway signal automatic control, can solve the problems of difficulty in detecting and maintaining the system, and achieve the effects of high practical value, improved operability, and reduced detection difficulty coefficient.
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[0018] The structure of the current point transponder system can be found in figure 2 As shown, the vehicle-mounted interrogator continuously transmits 27MHz energy to the ground transponder through the vehicle-mounted antenna, the downlink power carrier frequency is sent: 27.095MHz±5kHz, and the transponder information is received, the uplink signal is received: carrier frequency: 4.234MHz±200kHz, Frequency deviation: 282.24KHz±5%, modulation rate: 564.48Kbps±2.5%, forming error-free messages. Provide transponder information to the train control system through the isolated RS485 / CAN interface. Output self-test information and decoding information through isolated RS485 for recording and remote monitoring. The vehicle antenna is a duplex antenna that can send 27.095MHz energy signals to the ground transponder and receive the uplink returned by the ground transponder. Frequency-shift keying FSK (Frequency-shift keying) modulates the signal and transmits the signal to the vehi...
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