Sensor head for a dry powder agent
A sensor head for a dry powder agent according to an exemplary aspect of the present disclosure includes a housing defined along an axis along which light is communicated, the housing defines a multiple of apertures transverse to the axis, the multiple of apertures in communication with a measurement volume along the axis. A mirror is within the housing to reflect the light through the measurement volume.
1. A sensor head for a dry powder agent comprising:
a housing defined along an axis along which light is communicated, said housing defines a multiple of apertures transverse to said axis, said multiple of apertures in communication with a measurement volume along said axis; and
a mirror within said housing to reflect said light through said measurement volume.
2. The sensor head as recited in claim 1 , wherein said light is sourced from a red light emitting diode.
3. The sensor head as recited in claim 2 , wherein said light emitting diode operates at 650 nm.
4. The sensor head as recited in claim 1 , further comprising a light source which communicates light into said measurement volume through a fiber optic cable.
5. The sensor head as recited in claim 4 , further comprising a lens located opposite said mirror, said lens in communication with said fiber optic cable.
6. The sensor head as recited in claim 5 , further comprising a sensor located opposite said mirror, said sensor in communication with said fiber optic cable.
7. The sensor head as recited in claim 1 , wherein each of said multiple of apertures are 3 mm along said axis.
8. The sensor head as recited in claim 1 , wherein each of said multiple of apertures are 17 mm along said axis.
9. A calibration system for a dry powder agent comprising:
a powderizer calibration column;
a sensor system which includes at least one sensor head at least partially within said powder calibration column, said at least one sensor head comprises:
a housing defined along an axis along which light is communicated, said housing defines a multiple of apertures transverse to said axis, said multiple of apertures in communication with a measurement volume along said axis;
a mirror within said housing to reflect said light through said measurement volume;
a light source which communicates light into said measurement volume;
a receiver to receive reflected light within said measurement volume from said mirror; and
a control system in communication with said light source and said receiver.
10. The system as recited in claim 9 , wherein said control system is in communication with said light source and said receiver through a fiber optic cable attached to said housing.
11. The system as recited in claim 9 , wherein said control system is operable to determine an empirical relationship between a mass density concentration and a light transmittance for the dry powder agent.
12. The system as recited in claim 9 , wherein said control system is operable to calibrate said at least one sensor head.
13. The system as recited in claim 9 , wherein said control system is operable to calibrate said at least one sensor head light transmission measurement to a mass density concentration of an aerosol of the dry powder agent.
14. The system as recited in claim 9 , wherein said control system is operable to calibrate said at least one sensor head light transmittance measurement to a concentration of an aerosol of the dry powder agent within said powderizer calibration column in mass per volume.
15. A measurement system for a dry powder agent comprising:
a protected structure test fixture;
a sensor system which includes at least one sensor head at least partially within said protected structure test fixture, said at least one sensor head comprises:
a housing defined along an axis along which light is communicated, said housing defines a multiple of apertures transverse to said axis, said multiple of apertures in communication with a measurement volume along said axis;
a mirror within said housing to reflect said light through said measurement volume;
a light source which communicates light into said measurement volume;
a receiver to receive reflected light within said measurement volume from said mirror; and
a control system in communication with said light source and said receiver.
16. The system as recited in claim 15 , wherein said control system is operable to measure a concentration of an aerosol of the dry powder agent within said a protected structure test fixture.
17. The system as recited in claim 16 , wherein said protected structure test fixture is a gas turbine engine nacelle.
18. The system as recited in claim 15 , wherein said protected structure test fixture is a gas turbine engine nacelle.