Automatic controller of indicating board for school bus parking

Abstract

The invention relates to a controller of an indicating board, in particular to an automatic controller of an indicating board for school bus parking. The automatic controller of the indicating board for school bus parking comprises a stepping motor used for controlling the indicating board for school bus parking to stretch out and withdraw, a stepping motor driver driving the stepping motor to work, a sound-and-light driving circuit used for driving an alarm, a caution lamp and an indicating lamp to work, a limiting control circuit used for detecting whether opening or closing of the indicating board for bus parking is in place or not, an operating signal detecting circuit used for selecting various working states, and a single-chip microcomputer used for controlling the stepping motor driver and the sound-and-light driving circuit to work, wherein the stepping motor driver, the sound-and-light driving circuit, the limiting control circuit and the operating signal detecting circuit are respectively connected with the single-chip microcomputer, the stepping motor is connected with the stepping motor driver, the stepping motor driver is further connected to a vehicle-mounted power source, and the sound-and-light driving circuit is further respectively connected with the vehicle-mounted power source and a grounding terminal. The automatic controller of the indicating board for school bus parking has the advantages of being accurate in positioning, capable of being controlled by a driver conveniently and rapidly and avoiding error operation, and the like.

Description

technical field [0001] The invention relates to a controller for a sign, in particular to an automatic controller for a school bus parking sign. Background technique [0002] According to the requirements of "School Bus Safety Technical Conditions" (GB 24407-2012), special-purpose school buses must install a parking sign on the left side of the vehicle as required. When the school bus temporarily stops to get on and off the students in various road conditions, the parking sign will turn 90° in front of the vehicle, and at the same time, the red warning light will flash, and the buzzer will beep synchronously to remind the vehicles behind to keep a safe distance and stop. Wait; when the school bus is moving forward, the stop sign is retracted to the rear of the vehicle (the warning light and buzzer will stop working accordingly) to avoid potential safety hazards. The general school bus parking sign device usually consists of an octagonal traffic sign "stop" plate 4, a flip b...

AI Technical Summary

Problems solved by technology

[0003] At present, most of the parking signs installed on school buses are manually controlled, and the controller circuit is simple, so there are likely to be the following hidden dangers: 1. Open the stop sign by mistake during driving, or forget to take the stop sign back and drive after opening the stop sign when parking, which will cause danger to other vehicles, pedestrians and yourself; 2. After the parking sign is opened or retracted repeatedly, it will cause the wear and tear of the moving part of the limit switch, resulting in the parking sign not extending or retracting in place, and there will be certain safety hazards; 3. When the parking sign breaks down and the extension or retraction is not in place, the driver does not notice it, and the failure cannot be dealt with in time, resulting in unsafe driving

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