Radiant energy – Invisible radiant energy responsive electric signalling – Including a radiant energy responsive gas discharge device
Patent
1975-04-14
1976-05-25
Borchelt, Archie R.
Radiant energy
Invisible radiant energy responsive electric signalling
Including a radiant energy responsive gas discharge device
250336, 250375, G01T 116, G01T 118
Patent
active
039596532
ABSTRACT:
A radiation measuring instrument including a fast charge digitizer and a digital data acquisition system has been developed. The fast charge digitizer includes a charge integrator connected to a conventional ionization chamber which generates an output current in proportion to ionizing radiation exposure rate. The charge integrator has an output connected to a comparator which is switched from a high state to a low state when the output of the integrator goes above the comparator threshold. The comparator output is connected to a bistable multivibrator consisting of two non-retriggerable one shot multivibrators connected in a feedback configuration. As long as the comparator output is in the low state, the bistable multivibrator generates a train of pluses which are fed back through an analog switch and a high megohm resistance to the input of the integrator. This feedback is negative and has the effect of removing the charge from the integrating capacitor, thus causing the integrator output eventually to drop below the comparator threshold. When this occurs the comparator output returns to the high state and the bistable multivibrator ceases to generate output pulses. An output terminal is connected between the bistable multivibrator and the analog switch and feeds a train of pulses proportional to the amount of charge generated by the multivibrator output voltage and the high megohm resistance to a counter connected to a random access memory device. The output pulses are counted for a predetermined time and then stored in one of the data locations of the random access memory device. The counter is then reset and a further predetermined sample period is counted. This continues until all of the locations in the random access memory device are filled and then the data is read from the random access memory device.
REFERENCES:
patent: 3875410 (1975-04-01), Luger
patent: 3878496 (1975-04-01), Erickson
patent: 3897344 (1975-07-01), Marshall et al.
Lee Thomas R.
Schneider Roger H.
Wyatt John L.
Borchelt Archie R.
The United States of America as represented by the Secretary of
LandOfFree
Fast charge digitizer and digital data acquisition system for me does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Fast charge digitizer and digital data acquisition system for me, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fast charge digitizer and digital data acquisition system for me will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-907956