Hi everyone,
I want to design a cheap system for a game that can detect a small object dropping on a wooden Table/Plate, i.e. find the position of the drop.
A combination of shock sensors on the table and the dropject, high-gain amplification of their signals, onset discrimination and then a time to tigital conversion would be my first attempt here.
If the TDC is a good idea maybe even super-cheap shock sensors might suffice. Amplifying the sensor signal strongly shouldn't be a problem, because I only need to know if there is basically any signal present at the sensor above the noise floor and driving into saturation is okay with me.
The onset can be read out by a high-speed quad comparator or so (depending on the #ofsensors required) and put into a nice TTL voltage for the TDC.
The tabletop is sitting on some rubber bumpers... so it can resonate a little bit and carry the shock waves to the sensors.
so thats the general idea...
Do you have any suggestions/wisdom or is there a veto?
thanks
I want to design a cheap system for a game that can detect a small object dropping on a wooden Table/Plate, i.e. find the position of the drop.
A combination of shock sensors on the table and the dropject, high-gain amplification of their signals, onset discrimination and then a time to tigital conversion would be my first attempt here.
If the TDC is a good idea maybe even super-cheap shock sensors might suffice. Amplifying the sensor signal strongly shouldn't be a problem, because I only need to know if there is basically any signal present at the sensor above the noise floor and driving into saturation is okay with me.
The onset can be read out by a high-speed quad comparator or so (depending on the #ofsensors required) and put into a nice TTL voltage for the TDC.
The tabletop is sitting on some rubber bumpers... so it can resonate a little bit and carry the shock waves to the sensors.
so thats the general idea...
Do you have any suggestions/wisdom or is there a veto?
thanks