工艺美术运动时期作品:好心的过路人帮帮忙啊

This design is the development for the ZPW-2000A non- insulation track circuit transmitter technology. This design is based on the instructions provided by the advisor to the ZPW-2000A non- insulation track circuit transmitter to carry on the system study and the exploration. This design mainly completes the transmitter to compose the electric circuit one by one. The design procedure is: By the instructions provided by the advisor, this mentality passes through the entire design the beginning to end, namely: The design uses double CPU, to realizes the double CPU self-checking, mutually examines, two group of CPU and a group used in to produce the FSK frequency shifting signal programmable controller respectively to use the independent quartz crystal body source. The transmitter installation amplifier has used the emitter follower way constitution, prevented when breakdown the merit leaves voltage magnification. The equipment has considered to frequency shifting the carrier frequency, low frequency and the scope three characteristics examinations. Two group of CPU to examines when the result conforms to the requirement, by the dynamic single mode output passes "the security AND gate" the control execution link transmission to report to the police the relay. The root according to the above the mentality completed the low frequency code condition to read in turn takes the electric circuit, the square-wave sine converter and the drive enlargement electric circuit, the merit puts the electric circuit and the security and gate, double CPU self-checking, mutually examines and "N+ 1" the redundancy design, while convenient has understood the ZPW-2000A non- insulation track circuit engineering factor and the construction technology criterion. This design goal enables oneself to have more understandings in the ZPW-2000 non- insulation track circuit principle, making us to realize the theory and practice complementing one another, making us understand the design and the theory difference even more, and building the foundation for future work.
Key words: Track circuit, transmitter, frequency shifting, redundancy

This design is the development for the ZPW-2000A non- insulation track circuit transmitter technology. This design is based on the instructions provided by the advisor to the ZPW-2000A non- insulation track circuit transmitter to carry on the system study and the exploration. This design mainly completes the transmitter to compose the electric circuit one by one. The design procedure is: By the instructions provided by the advisor, this mentality passes through the entire design the beginning to end, namely: The design uses double CPU, to realizes the double CPU self-checking, mutually examines, two group of CPU and a group used in to produce the FSK frequency shifting signal programmable controller respectively to use the independent quartz crystal body source. The transmitter installation amplifier has used the emitter follower way constitution, prevented when breakdown the merit leaves voltage magnification. The equipment has considered to frequency shifting the carrier frequency, low frequency and the scope three characteristics examinations. Two group of CPU to examines when the result conforms to the requirement, by the dynamic single mode output passes "the security AND gate" the control execution link transmission to report to the police the relay. The root according to the above the mentality completed the low frequency code condition to read in turn takes the electric circuit, the square-wave sine converter and the drive enlargement electric circuit, the merit puts the electric circuit and the security and gate, double CPU self-checking, mutually examines and "N+ 1" the redundancy design, while convenient has understood the ZPW-2000A non- insulation track circuit engineering factor and the construction technology criterion. This design goal enables oneself to have more understandings in the ZPW-2000 non- insulation track circuit principle, making us to realize the theory and practice complementing one another, making us understand the design and the theory difference even more, and building the foundation for future work.
Key words: Track circuit, transmitter, frequency shifting, redundancy