I want to build a tonfa, police stick that counts how hard and how often somebody used it.
The idea is that, if a policeman uses his gun he has to justify it, but if he hits somebody with his tonfa nobody can prove it.
As sensors i want to use these little things.
This mechanism is used in cheap bouncing balls, that start blinking if they hit a wall hard enough.
(if the kinetic force is strong enough the feder in the middle bends over and closes a circuit).
The tonfa has a diameter of 3 cm,
and ist 56 cm long.
my questions are:
Are there better impact sensors or should i use a high-g accelerometer?
How many g´s, like g-force units measures a hit?
I have a few doubts about my "sensors" that i use at the moment, the differences between the impact forces should be
detected through the different placing along the stick.
the sensor nearest to the hand only closes when the impact is realy strong.(leverage)
Which arduino would you recommend me to use? ( power, wireless, usb, size,nano, mini, pro series?)
i have to put the batteries into the stick, and there must be a communication with the computer.
either wireless or through usb.
If i want to use a switch, where should i place it and which one should i use?
Or is it able that the arduino turns himself on/off ? (sleep mode)
The sensor data ( which are at the moment digital, simple closed or not closed ) must be stored on the arduino. (eeprom)
Perhaps somebody has a piece of code that he thinks would help me, like counting and storing multiple button signals on the arduino.
Should time play a role? ( like, when has he hit, the i have to do something like time related counting)
Code for visualizing my sensor data?
Some piece of hardware that you would recommend me?
Completey different solution?
Well if somebody has any idea, solution or answer please post it.
Im thankful for every answer.