Consider it this way; a circuit structure is any kind of diagram that illustrates the way the circuit functions where the primary objective is the appropriate wiring of components and their connection to each other rather than physical place relative to one another or intending prototypes. However, in some uses classifying diagrams can be difficult so do this as overall information. I've found this is especially true when dealing with much more complex circuits and electronic equipment. I'm likely to work with a simpler but typical industrial circuit because these circuit set ups are the exact same, but where you're able to observe how each type of diagram shows the use of the circuit in their own manners.
Less clutter, right? I've got enough information in all of these diagrams to know exactly what this circuit does and also where to look for problems. Hope that this helps. ( Note: don't confuse circuit or schematic diagrams together with wiring diagrams; wiring diagrams will typically show pictures of components such as the pictorial, and also how the entire or portion of a circuit has been wired. The distinction is that wiring diagrams generally put an emphasis on actual physical location of necessary components relative to each other that basically tell a layman Just What to do concerning the wiring. )
Pictorial design diagrams, or graphic circuit diagrams are essentially the same thing with the identical purpose, however they use pictures of elements inside the circuit rather than symbols. Again, here is the same precise circuit (almost except a control transformer was added and they are using conductors L1 and L3 instead of L1 and L2.
A design diagram refers to a particular type of circuit diagram which uses standard electrical/electronic symbols instead of images to show how a circuit (or part of it) functions. Below is a standard 3-wire motor controller circuit employing a normal short stop halt - start pushbutton station utilizing a schematic diagram. (Momentary here means that the button/switch you activate will return to its default position once you let go of it, usually by a spring which compels the button/switch to get this done.)
Here is another schematic diagram showing exactly the identical circuit, components and connections and it looks different but they both fall into exactly the exact identical category.
Here's a technical variant of a design diagram. The principle intent of this diagram is to demonstrate the logic (speaking to electric management ) of a circuit. This really is the one I mostly encounter in my line of work, and it's very successful for troubleshooting issues or learning the way the circuit works. Some frequencies are so enormous that many types of schematic diagrams need to be recorded in increments in novel form (normally with coded numbers so info can be easier located ). Again, here is the exact identical exact circuit since the first two weeks, but looking at it in ladder form.