19 Periodic action

Instead of continuous action, use periodic or pulsating actions.
  • Flashing bicycle light, more visible than a continuous beam.
  • Replace a continuous siren with a pulsed sound.

If an action is already periodic, change the periodic magnitude or frequency.
  • Use Frequency Modulation to convey information, instead of Morse code.
  • Replace a continuous siren with sound that changes amplitude and frequency.

Use pauses between impulses to perform a different action.
  • In cardio-pulmonary respiration (CPR) breathe after every 5 chest compressions.
Principe 19 : Flashing bicycle light, more visible than a continuous beam.


From TRIZ to ASIT

Connectez-vous pour un exemple ASIT de ce principe

Concrete examples

Connectez-vous pour voir 67 exemples TRIZ


Is this TRIZ principle frequently used?

This principle is moderately used with 158 instances in the matrix.

This principle is proposed to solve the following contradictions:

Click on a contradiction to explore it

1/13 1/18 1/22 1/38 2/10 2/16 2/17 2/18 2/20 2/21 2/22 2/26 2/30 2/35 3/15 3/17 3/36 5/10 5/18 5/19 5/21 6/16 8/2 8/3 8/30 9/10 9/15 9/18 9/21 9/22 9/26 10/3 10/5 10/15 10/19 10/21 10/37 11/15 11/17 11/27 11/36 12/17 13/7 13/19 13/32 14/18 14/19 15/1 15/3 15/5 15/7 15/10 15/11 15/17 15/18 15/21 15/37 15/39 16/2 16/17 17/3 17/4 17/11 17/12 17/15 17/16 17/19 17/27 17/28 17/38 18/1 18/3 18/5 18/9 18/10 18/14 18/15 18/17 18/19 18/25 18/26 18/30 18/31 18/32 18/33 18/35 19/5 19/13 19/14 19/17 19/18 19/21 19/25 19/27 19/33 20/2 20/18 20/31 20/37 21/2 21/5 21/15 21/18 21/19 21/24 21/26 21/27 21/30 21/35 21/36 21/37 22/1 22/2 22/17 22/24 22/34 24/18 24/21 24/22 25/18 25/19 27/11 27/19 28/17 29/10 29/17 30/8 30/18 30/21 30/23 30/36 30/37 31/1 31/18 31/20 31/36 32/11 32/22 33/22 34/22 35/2 35/19 35/21 36/3 36/11 36/13 36/21 36/30 36/31 37/10 37/15 37/20 37/22 37/30 38/17 38/18 39/18 39/19


The colour indicates the ranking of the proposed principle to solve the contradiction: 1st, 2nd, 3rd, 4th.
This ranking reflects the frequency of occurrence of the principle in the analysed patents for this type of contradiction.
When a principle appears in first position, it means that it is statistically the most used in the patents studied for this type of problem.

Using TRIZ in your organization?

Discover our structured creativity training to solve your technical challenges with your R&D teams.