RockeTiltometer 2 ATTITUDE-BASED AIR-START IGNITION CONTROL SYSTEM
The ROCKETILTOMETER™ utilizes several sensors and a microController to monitor the attitude, specifically the rocket’s tilt or deviation from the vertical (or “Z”) axis during flight. In its present form, it is able to perform two significant functions.
Simple to use
o Three slide switches determine the critical angle – 5-40 degrees in 5 degree increments
o Accommodates multiple external ignition trigger methods
o Built in launch detection
o No computer interface required
o Audible diagnostic tones or remote indicators report monitoring of internal and external circuits
o Each circuit is terminated on two terminals on the system board – no on or off board splicing required
o Built in flight data logger with removable microSD card for download
o Mount and wire it up, set the critical angle, turn the system on, arm the ignition circuit and launch!
o If the critical angle has been exceeded, any ignition trigger signals are ignored
Mounting
o Standard on-edge vertical mounting; horizontal mounting is available as special order option
o Nylon mounting screws and spacers provided
o 4-40 threaded brass inserts and pin-vise ready tap provided
Main system components
o PIC and ATMega microControllers
o 3-axes accelerometer for gyroscope calibration and launch-detect
o 3-axes MEMS gyroscope for tilt monitoring
o 3-axes magnetometer to allow Z-axis spin rates up to 520 degrees per second
o 3 angle selection switches determined critical angle between 5 and 40 degrees in 5 degree increments
o 3 option selection switches available for user configuration settings
o High-capacity MOSFET for system ignition circuit capable of switching up to 20 amps up to 12 volts
Ignition pulse de-activates after 2 seconds
o LEDs and toner for system operation and diagnostic feedback
On-board LED for “heart beat” indication of system operation
On-board LED indicates whenever critical angle is exceeded – useful for testing
On-board LEDs indicate status of data logger, including missing or bad microSD card
Remote indicator source for diagnostic feedback at remote airframe location
o Integrated flight data logger with microSD card for easy data retrieval without demounting system
Special circuits
o Separate 2-terminal optional ignition trigger inputs handle virtually any external trigger source
One input for logic low or simple switched dry contact closure
One input for logic high or simple switched positive voltage source
o Separate 2-terminal ON/OFF switch circuits for each battery source
Download the User Guide
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