Hello people,
I am working on a project that has to detect an electrical breakdown. The system works as follows:
A high voltage is beign applied to the top of a metal, this metal has a protective layer on it. If the protective layer has pores, breakdown will occur between the top and the bottom, because the air inbetween will start to conduct. The bottom is grounded.
The problem is, the protective layer combined with the metal forms a capacitor. This means there will be a current when the voltage is being applied, because the capacitor has to charge up first.
When a breakdown occurs, the high voltage will only fall about halfway down and then it will charge up again. Is it possible to detect a breakdown, and not detect when a breakdown does not happen? Because of the charge up current it will always detect something initially.
Is there a way At this moment i use a monostable multivibrator to detect a change in voltage, and i have coupled this capacativly (don't really know the english word) to the high voltage. Problem is, the coupler will try to draw current from the ground when a breakdown occurs so the current will flow away from the detector. I'm really stuck, i have tried a lot of things, maybe someone here knows something that could help me?
I am working on a project that has to detect an electrical breakdown. The system works as follows:
A high voltage is beign applied to the top of a metal, this metal has a protective layer on it. If the protective layer has pores, breakdown will occur between the top and the bottom, because the air inbetween will start to conduct. The bottom is grounded.
The problem is, the protective layer combined with the metal forms a capacitor. This means there will be a current when the voltage is being applied, because the capacitor has to charge up first.
When a breakdown occurs, the high voltage will only fall about halfway down and then it will charge up again. Is it possible to detect a breakdown, and not detect when a breakdown does not happen? Because of the charge up current it will always detect something initially.
Is there a way At this moment i use a monostable multivibrator to detect a change in voltage, and i have coupled this capacativly (don't really know the english word) to the high voltage. Problem is, the coupler will try to draw current from the ground when a breakdown occurs so the current will flow away from the detector. I'm really stuck, i have tried a lot of things, maybe someone here knows something that could help me?