discuss to describe as best as possible an automatic garage door opener system.
ID: 1811820 • Letter: D
Question
discuss to describe as best as possible an automatic garage door opener system. You should either use one you are familiar with as an example, or recall the details from one or more that you imagine could be available with the combined features, or design one yourself with new features.
Your system must have at least two button type inputs, at least two logical sensor inputs, and one logical actuator. The motor system can have its own control system that is embedded in your system. You will not describe this control system but only the high level control inputs and logical sensor values it provides. For example, a control value to the motor could be Up, Down, Start, Run, Slow, Fast, Stop, and sensor inputs could be: Moving, Stopped, High Torque, Low Torque, or Over Torque. You should include some safety sensors, limit sensors, etc. You do not have to locate these devices in the catalogs but only describe in simple terms what each actuator or sensor is suppose to accomplish and how it does its job.
You should draw on one page a block diagram of the system, and on another page describe all the relevant components. For example a motor that can drive the door up or down depending on…(write more here).
You should describe all the logical sensors, logical actuators, and buttons in your system.
You should make an attempt to break the system down into a number of states, and describe how each input causes the system to leave or enter a different state, as well as what outputs are active in each state.
Explanation / Answer
A garage door opener is a motorized device that opens and closes garage doors. Most are controlled by switches on the garage wall, as well as by remote controls carried by the owner. The electric opener The electric overhead garage door opener was invented by C.G. Johnson in 1926 in Hartford City, Indiana. Electric Garage Door openers did not become popular until Era Meter Company of Chicago offered one after World War II where the overhead garage door could be opened via a key pad located on a post at the end of the driveway or a switch inside the garage.[1] Contrary to popular belief, the electric opener does not provide the actual lifting power to open and close a heavy garage door. Instead, most of the actual lifting power comes from the counterbalance springs attached to the door. These springs are under tension to lift the garage door via steel counterbalance cables. The electric opener only controls how far the door opens and closes, as well as the force the garage door exerts. In most cases, the garage door opener also holds the door closed in place of a lock. The typical electric garage door opener consists of a power unit that contains the electric motor. The power unit attaches to a track. A trolley connected to an arm that attaches to the top of the garage door slides back and forth on the track, thus opening and closing the garage door. The trolley is pulled along the track by a chain, belt, or screw that turns when the motor is operated. A quick-release mechanism is attached to the trolley to allow the garage door to be disconnected from the opener for manual operation during a power failure or in case of emergency. Limit switches on the power unit control the distance the garage door opens and closes once the motor receives a signal from the remote control or wall push button to operate the door.[2] The entire assembly hangs above the garage door. The power unit hangs from the ceiling and is located towards the rear of the garage. The end of the track on the opposite end of the power unit attaches to a header bracket that is attached to the header wall above the garage door. The power head is usually supported by punched angle iron. Recently another type of opener, known as the jackshaft opener, has become more popular. This style of opener was used frequently on commercial doors but in recent years has been adapted for residential use. This style of opener consists of a motor that attaches to the side of the torsion rod and moves the door up and down by simply spinning the rod. These openers need a few extra components to function safely for residential use. These include a cable tension monitor, to detect when a cable is broken, and a separate locking mechanism to lock the door when it is fully closed. These have the advantage that they free up ceiling space that an ordinary opener and rail would occupy. These also have the disadvantage that the door must have a torsion rod to attach the motor to. [edit]Remote control The first wireless garage door openers were invented and developed by two US inventors at the same time, one in Illinois and the other in Washington state. They were unknown to each other. [3] The first garage door opener remote controls were simple and consisted of a very simple transmitter (the remote) and receiver which controlled the opener mechanism. The transmitter would transmit on a designated frequency; the receiver would listen for the radio signal, then open or close the garage, depending on the door position. The basic concept of this can be traced back to World War II. This type of system was used to detonate remote bombs. While novel at the time, the technology ran its course when garage door openers became widely available and used. Then, not only did a person open their garage door, they opened their neighbor
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