A compact vehicle flow statistics equipment start-up delay and protection circuit

Abstract

The invention discloses a compact vehicle flow statistic device start-up delay and protection circuit which comprises a power input module, a delay module, a clamping module, a coding board and an FPGA board. The delay module is used for setting the delay time; the clamping module for overvoltage protection and filtering the voltage output from the delay module; the output end of the power input module is respectively connected with the input end of the delay module and the input end of the FPGA board, the output end of the delay module is connected with the input end of the clamping module, the output end of the clamping module is connected with the input end of the coding board, and the coding board is connected with the FPGA board. The circuit can ensure the normal start of the encodingboard and has high practicability. In addition, the invention filters the external high input voltage, interference noise and power ripple through a delay module and a clamping module, can reduce thedamage rate of the equipment, has high reliability, and can be widely applied in the technical field of electronic equipment.

Description

technical field [0001] The invention relates to the technical field of electronic equipment, in particular to a start-up delay and protection circuit of compact vehicle flow statistics equipment. Background technique [0002] In the current electronic equipment, since the VO interface of the encoding board is connected to the FPGA board, part of the video signal lines in the VO interface are multiplexed with the encoding board startup sequence setting function, and the FPGA board will set the encoding board startup sequence signal line during startup. If the encoding board and the FPGA board are powered on at the same time, it may cause the encoding board to fail to start normally. On the other hand, the power input part of the current electronic equipment may be connected to an excessively high input voltage due to human error, or be affected by interference factors such as input power ripple, external lightning strikes, static electricity, etc., resulting in failures such ...

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Problems solved by technology

[0002] In the current electronic equipment, since the VO interface of the encoding board is connected to the FPGA board, part of the video signal lines in the VO interface are multiplexed with the encoding board startup sequence setting function, and the FPGA board will set the encoding board startup sequence signal line during startup. If the encoding board and the FPGA board are powered on at the same time, it may cause the fault that the encoding board cannot start normally.

On the other hand, the power input part of the current electronic equipment may be connected to an excessively high input voltage due to human error, or be affected by interference factors such as input power ripple, external lightning strikes, static electricity, etc., resulting in failures such as restarting or damage to the equipment. Reliable lower sex

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