Measurement of chest deflection is critical for the assessment of thoracic injury since deflection and the viscous response are two of the most widely accepted criteria for chest injury. As a result, over the years since anthropomorphic test devices (ATDs) or crash test dummies first became available, many different devices have been developed to measure chest deflection. Rouhana et al. published in 1998 results of the development and preliminary testing of a new device, called the IR-TRACC (InfraRed-Telescoping Rod for Assessment of Chest Compression). In its original concept, the IR-TRACC consists of two infrared light emitting diodes (LEDs) 'facing' each other from the two ends of a stainless steel, double-gimbaled telescoping rod. One LED serves as the light emitter and the other as the receiver. The IR-TRACC works on the priciple that the irradiance from a point source decreases as the inverse squre of the distance from the source. The IR-TRACC has been evaluated at several laboratories in the US and Europe. While accuracy and ability to capture high-speed data were considered acceptable, other issues were noted with the first generation system. These issues included small artifacts in the deflection-time data, high power consumption of the circuits, the size of the linearizing circuit and the measurement range of the telescoping rod. The second generation IR-TRACC appears to have satisfactorely addressed all of these issues. The primary remaining issues are filtering to be used with the IR-TRACC deflection data and the weight associated with multiple IR-TRACCs in a single dummy chest.
Laboratory experience with the IR-TRACC chest deflection transducer
Laboruntersuchungen mit dem IR-TRACC-Wandler zur Ermittlung der Brustkorbverformung bei Dummies
2002
23 Seiten, 36 Bilder, 4 Tabellen, 17 Quellen
Conference paper
English
Laboratory experience with the IR-TRACC chest deflection transducer
Automotive engineering | 2002
|Laboratory Experience with the IR-TRACC Chest Deflection Transducer
SAE Technical Papers | 2002
|2002-01-0188. Laboratory Experience with the IR-TRACC Chest Deflection Transducer
British Library Conference Proceedings | 2002
|ACEA Investigations Regarding Hybrid III Chest Deflection
British Library Conference Proceedings | 1994
|Chest Deflection Characteristics of Volunteers and Hybrid III Dummies
SAE Technical Papers | 1986
|