Accession Number:

AD0412337

Title:

PIEZOELECTRIC CHARGER CD V-751X.

Descriptive Note:

Final rept.,

Corporate Author:

BENDIX CORP CINCINNATI OHIO

Personal Author(s):

• Lehman,R.
• Stirnkorb,John

Report Date:

1963-07-09

Pagination or Media Count:

69.0

Abstract:

The design, development and fabrication of a radiological dosimeter charger, which uses piezoelectric ceramic crystals to generate the electrical energy and a lens system for external ambient light only, is described. This charger, presently designated OCD No. CD V-751X, has been developed as a possible replacement for the transistorized charger, OCD Item No. CD V-750, but requires no batteries therefore, it has long shelf life. The effects of static stress on the piezoelectric properties of different ceramic materials were studied and basic formulas derived. Studies showed that the charge generated by the application of force to the piezoelectric material was directly pro portional to force and to the material constant but was not dependent on the size. The material constants varied with stress, however, particularly at high stress values, so the size and shape affects the charge output indirectly. The charger is capable of using either natural sunlight or concentrated sources of light such as room light fixtures, flashlights or candles. All performance and environmental test require ments were passed on the prototype chargers except that for humidity. Modifications to the prototypes are suggested which should correct this humidity problem. Author

Descriptors:

• *DOSIMETERS
• *PIEZOELECTRIC CRYSTALS
• GENERATORS
• GENERATORS
• RADIOMETERS
• RADIATION DOSAGE
• MEASUREMENT
• ENERGY

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE