Power supply screen flash plate circuit

Abstract

A power supply screen flash plate circuit comprises a power module, a frequency regulating module, a CPU module, a frequency display module and a flashing power source output module, wherein the power module reduces input 24V alternating current into stable and reliable 5V direct current so as to provide working power for modules, the frequency regulating module produces and sends pulses to the CPU module, the CPU module receives pulse signals and counts the frequencies of a flashing power source, sends the counted frequency data to the frequency display module for display and meanwhile controls the flashing power source output module to output flashing frequencies, and the frequency regulating module comprises an incremental encoder and can adjust the flashing frequencies at any time. The power supply screen flash plate circuit can provide a 24V alternating-current flashing power source required by a real railway field to achieve power on-off ratio of 1 to 1, the parameter accuracy and the stability are higher, and high reliability, few breakdowns, simple circuit, small size and working stability are achieved by adopting the integrated circuit, and practical teaching about railway signal power equipment in railway academies can be improved.

Description

technical field [0001] The invention relates to railway signal technology, a power supply system of railway signal equipment, and a stable technology of signal power supply, in particular to a power supply screen flash board circuit that provides 24V AC flash power required by the railway site. Background technique [0002] The signal power supply panel is a system that provides power for signal equipment. The stability, reliability and safety of the power supply provided by the signal power supply panel will directly affect the work of signal equipment. For a long time, the flash power supply of the signal power screen has the following shortcomings: [0003] 1. The flash power supply circuit board does not use integrated circuits, which is bulky and takes up a lot of space for installation; [0004] 2. Discrete components are used, which are easily damaged and have poor reliability; [0005] 3. The flash frequency is adjusted by two potentiometers, if the adjustment i...

AI Technical Summary

Problems solved by technology

[0003] 1. The flash power supply circuit board does not use integrated circuits, which is bulky and takes up a lot of space for installation;

[0004] 2. Discrete components are used, which are easily damaged and have poor reliability;

[0005] 3. The flash frequency is adjusted by two potentiometers, if the adjustment is too much, the circuit will be easily damaged;

[0006] 4. The size of the flash frequency is not intuitive, only by feeling;

[0007] 5. The stability of the flash power supply is poor, which affects the normal operation of the signal equipment

[0008] At present, when railway colleges and universities are simulating the railway site, in order to improve the efficiency of the experiment, students need to intuitively understand the working conditions of the equipment and the parameters related to the measurement through observation and hands-on operation of the equipment. , the adjustment of the flash power frequency is inconvenient, the current output power frequency cannot be observed intuitively, and the equipment is easily damaged, the reliability is poor, the experimental effect cannot meet the needs of teaching, and it is not suitable for the needs of signal professional experiment training

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