How are the three times in logic explained?

. . . . Can I say as shown in the figure? . . t1: high-level delay – the high level cannot disappear during this delay period; if it remains high after that time, a high level is output. This is generally used to prevent signal jitter, although it is also utilized for normal delays. t2, low-level delay: the principle is the same as that of high-level delay, except that the signal direction is reversed; it requires the low level to persist for the delay time before it changes. t3, the pulse delay: as long as a high-level signal is received, it will trigger the action, but with a delay; even if the high-level signal is just a spike pulse, the output will still be generated once the delay time has passed.

What was said upstairs is quite good; I’ll add a little bit more. The first is delayed triggering with synchronous recovery. When implementing interlocking, it will trigger only after a delay of t1; if the signal duration is less than t1, it will not trigger. (For example, in the case of a low lubricating oil pressure interlock associated with a compressor equipped with an auxiliary oil pump, if a failure of the main oil pump results in insufficient oil pressure, and the auxiliary oil pump starts up properly within time t1, allowing the lubricating oil pressure to be restored, then there is no need for an interlocked shutdown.) ； If the auxiliary oil pump does not start within t1 and the lubricating oil pressure remains insufficient, the equipment will be shut down via interlock protection. ) The second one is the same as the first, except that the direction of the signal is reversed. Whether to use t1 or t2 depends on the polarity of the trigger signal, but in practical applications, it is usually sufficient to invert the input signal and then use t1. The third type is delayed triggering, with delayed recovery. Regardless of how long it lasts, it will definitely be triggered after a delay of t3. (For example, in cases where a pump stops and a valve closes automatically after the feeding of certain high-viscosity media is completed, it should be set so that the pump stops at the first signal, and the valve closes after a delay of t3; this prevents the fluid from continuing to flow due to inertia at the time of valve closure, thereby avoiding damage to the pipelines.) ) In interlocking, this delay signal is used in conjunction with the “signal hold” function; “signal hold” means that after it is activated, manual reset is required to restore the normal state, otherwise it will remain in that held state. (For example, in the case of the valve-shutting signal illustrated as t3, if it is closed after a delay of t3 and not held in that position, it will open again very quickly, resulting in the action of closing being pointless.) ）