Traditional canopies are manual expansion or switch type electric expansion, are controlled by people, if the rain can not manipulate the canopies to make it extend in time, then it can not play the role of rain, resulting in the inability to work or operate.
Automatic retractable canopy, easy to use, simple to operate, can meet the use of large areas or large areas, to ensure that these areas can meet the all-weather use and operation.
At the same time, the automatic retractable canopy is linked with the fire protection system to ensure that in the event of fire, the canopy can be automatically opened to ensure rescue and smoke evacuation, and ensure personnel safety. The automatic retractable canopy is not only a new type of automatic structure, but also provides a new reference scheme for the roof design of other similar places.
Design and analysis of automatic retractable canopy structure
(1) GSM remote control system
The system is composed of TC35GSM module, MCU minimum system board, DC motor drive board, DC motor and awning mechanical structure.
The L298N is a power drive circuit that contains two sets of double H Bridges. It is mainly used to drive the DC motor, which can drive the rear awning mechanical device to realize the awning opening and closing.
(2) Software design ideas
The microcontroller starts the CSM by starting the circuit, and determines that GSM is started by giving it the command AT, and returns "OK" if GSM is started. Enter the working state, send the specified short message and wait to receive the command of the monitoring center and delete the read short message.
The single chip microcomputer can receive the short message data from the CSM module and judge and analyze the received signal and data. And execute peripheral hardware action program according to valid command.
(3) Canopy traction system structure
The awning traction system is mainly composed of pulley block, electric protection device, traction transmission mechanism, steel truss, guide wheel group and so on.
The traction transmission mechanism such as reducer motor, coupling, sprocket and the canopy running track adopt the form of pin-gear transmission to ensure the smooth operation of the canopy when it is expanded or contracted.
The electric protection device is composed of an electric push rod and an elastic safety latch, etc. When the pin gear transmission stops, the electric push rod automatically pushes the elastic safety latch downward into the pin teeth to effectively prevent the accidental sliding of the awning.
In addition, if the current or speed change of the canopy traction system is abnormal, the electric push rod can insert the latch into the pin teeth, which has a good safety protection function. The electric protection device provides a second safety protection measure for the canopy expansion or contraction, ensuring the safety of the canopy during normal expansion or contraction.
(4) Canopy running track structure design
The awning running track is used as the awning expansion and contraction track, which is installed and fixed on the top of the stand, with a group of tracks on each side. The track installation ensures a certain slope, so that the rain can slide smoothly backward when the awning is deployed.
At the same time, the track installation should ensure its levelness, straightness and other requirements. The installation error will cause the structure deformation to produce additional stress, resulting in the canopy can not run smoothly.
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