Abstract: A blunt force sensor array for application to a non-planar surface includes a flexible thin-film substrate, a plurality of force sensors secured to the flexible thin-film substrate proximate to a center measurement point, a strain gauge secured on the flexible thin-film substrate proximate to the center measurement point, and a sensor interface configured to connect to external measurement and control circuitry. The sensor interface may be electrically connected to each of the force sensors and the strain gauge via traces disposed on the flexible thin-film substrate. The flexibility and shape of the flexible thin-film substrate may permit the blunt force sensor array to be applied to the non-planar surface to detect forces and strains experienced by the non-planar surface in response to a blunt force event on the non-planar surface.

Abstract: A micro atomizer to produce stable aerosol concentrations having an aerosol mass median aerodynamic diameter (MMAD) of less than 10 microns with liquid flow rates in the microliter per minute range is provided. The micro atomizer includes a liquid channel in the shape of a thick-wall tube and a cap having an aerosol outlet orifice whereby a liquid-gas contact space is formed by the internal surface of the cap and the substantially flat end of the liquid channel. Pressurized carrier gas and the liquid to be aerosolized are allowed to come into contact within a precisely formed liquid-gas contact space. The desired aerosol characteristics are accurately established, stable, and reproducible. In an exemplary embodiment, the micro atomizer is used with a syringe and syringe drive to provide a continuous liquid source for aerosol generation.