Programmable controlled-exposure radon measurement system

Details Programmable controlled-exposure radon measurement system Programmable controlled-exposure radon measurement system

1990-06-21

1992-04-21

Hannaher, Constantine

Radiant energy

Geological testing or irradiation

250255, 2503361, G01T 102, G01T 114

Patent

active

051071088

ABSTRACT:
A programmable controlled-exposure radon measurement system includes a radon detector of the type that is programmably inhibited or enabled at selected times to effect randon measurement. In the preferred embodiment, a radon detector of the type having an electret within a chamber is located at the test site and the container opened and closed to the ambient atmosphere at selected times to limit exposure to certain intervals during the day for a selected number of successive days. The container is opening by an actuator, such as an electro-actuator or a fluidic actuator, under the control of a programmable controller, such as a 7-day timer or a stored program controlled microprocessor. A fail-safe function is provided by which the radon detector is inhibited in the event of a power failure to preserve test data up to the time of the power failure.

REFERENCES:
patent: 2833928 (1958-05-01), Parsons
patent: 3641439 (1972-02-01), Aslan
patent: 4055762 (1977-10-01), Durkin
patent: 4286155 (1981-08-01), Utting
patent: 4853536 (1989-08-01), Dempsey et al.
Breslin et al., "An Improved Time-Integrating Radon Monitor" U.S. Department of Energy, Environmental Measurements Lab, N.Y., Nov. 20-22, 1978, pp. 1-6.
Guggehneim et al., "A Time-Integrating Environmental Radon Daughter Monitor", Health Physics, vol. 36, Mar., pp. 452-455.

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