In order to compare test results obtained from different crash test facilities@ standardized coordinate systems need to be defined for crash test dummies@ vehicle structures@ and laboratory fixtures. In addition@ recorded polarities for various transducer outputs need to be defined relative to positive directions of the appropriate coordinate systems. This SAE Information Report describes the standardized sign convention and recorded output polarities for various transducers used in crash testing.
SAE J1733-2018 history
2018SAE J1733-2018 Sign Convention for Vehicle Crash Testing
2007SAE J1733-2007 Sign Convention for Vehicle Crash Testing
1994SAE J1733-1994 Sign Convention for Vehicle Crash Testing