ANALOG SIGNAL MEASUREMENT SYSTEM AND GAMMA RAY DETECTOR WITH TARGETED AUTOMATED GAMMA SPECTROSCOPY

• US 20110035161A1
• Filed: 04/15/2009
• Published: 02/10/2011
• Est. Priority Date: 04/15/2008
• Status: Abandoned Application

• Current Assignee: Mobile Detect, Inc.
• Original Assignee: Mobile Detect, Inc.
• Inventors: Clarke, Christopher James McInnis, McFadden, Robert Cassin
• Application Number:
  US12/988,017
• Publication Number:
  US 20110035161A1
• Time in Patent Office: Days
• US Class Current: 702/28
• CPC Class Codes: G01T 1/203 the detector being made of plastics

Abstract

An analog signal measurement system and a gamma ray detector with targeted automated gamma spectroscopy for gamma radiation surveillance system are disclosed. The analog signal measurement system has dynamically programmable lower and upper level discriminators for measuring an analog signal thereagainst, and logic devices for receiving input from the discriminators to generate digital signals. The gamma ray detector comprises a gamma ray detector for converting a gamma ray photon into an analog pulse, and a single channel analyzer or the analog signal measurement system. The gamma ray detector further includes dynamically programmable lower and upper level discriminators for converting the analog pulse generated from the gamma ray detector into a digital signal, a resettable programmatically controlled counter for counting the digital signal and a computing device that controls the lower and upper level discriminators for defining a gamma ray energy window and measures gamma count rate for that energy window.

Claims

1. An analog signal measurement system comprising:

i. one or more dynamically programmable lower level discriminators configured to generate output data for an analog signal greater than a programmable level,

ii. one or more dynamically programmable upper level discriminators configured to generate output data for the analog signal less than a programmable level,

iii. one or more logic devices configured to generate output data for programmable combinations of the output data from the one or more lower level discriminators and the one or more upper level discriminators,

iv. one or more counters that programmatically count the output data of the one or more logic devices, and

v. a computing device that analyzes the counts and programmatically controls the one or more upper level discriminators and the one or more lower level discriminators with a series of one or more programmable levels,

wherein the computing device analyzes the counts and programmatically controls the one or more dynamically programmable lower level discriminators and the one or more dynamically programmable upper level discriminators with a temporally, or spatially or both temporally and spatially determined series of programmable levels.

5. The analog signal measurement system of claim 1, wherein the one or more counters programmatically count the output data of the one or more logic devices during a programmable period of time, or at a programmable time and for a programmable duration of time.

7. The analog signal measurement system of claim 1, wherein the computing device initiates the one or more counters for the counting of the output data of the one or more logic devices in a temporal, or spatial relationship to an event'"'"'s time or location or in a combination thereof.

8. The analog signal measurement system of claim 1, further comprising a data storage device wherein the computing device stores the counts counted by the counter in the storage device.

11. The analog signal measurement system of claim 8, wherein the computing device analyzes the counts or stored counts.

13. The analog signal measurement system of claim 1 further comprising

a gamma ray sensing detector that converts a gamma ray into an analog signal, being communicated to the upper level discriminators and lower level discriminators.

15. The analog signal measurement system of claim 13, further comprising a computing system that analyzes the counts to determine spectral information in respect to gamma rays sensed by the gamma ray sensing detector.

16. The analog signal measurement system of claim 15, wherein the computing system analyzes the counts to determine possible threats arising from the sensed gamma rays.

17. The analog signal measurement system of claim 16, wherein the computing system numerically represents the possible threats.

18. The analog signal measurement system of claim 16, wherein the computing system graphically represents the possible threats.

19. The analog signal measurement system of claim 16, wherein the computing system fuses the possible threats with conventional or other security sensor information and data for analysis or representation.

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20. A gamma detector with the capability to conduct targeted automated gamma spectroscopy comprising:

a. a gamma ray sensing detector that converts a gamma ray into an analog signal;

d. one or more single channel analyzer units that are in communication with the gamma ray sensing detector, each of the single channel analyzer units comprising a programmable upper level discriminator and a programmable lower level discriminator that define a programmable gamma ray energy window, wherein the each of the one or more single channel analyzer units receives the analog signal from the amplifier and generates digital signal pulses upon determining that the analog signal from the amplifier is within the programmable energy window;

e. one or more resettable counters that are in communication with the one or more single channel analyzer units, wherein the resettable counters receive and count the digital signal pulses from the one or more single channel analyzer units for gamma ray counts; and

f. a computing device that programmatically controls the programmable gain of the photomultiplier tube, programmatically controls the upper level discriminator and the lower level discriminator of the each of the one or more single channel analyzer units, and calculates gamma count rates based on the gamma ray counts retrieved from the one or more resettable counters.

22. The gamma detector as recited in claim 20, wherein the upper level discriminator and the lower level discriminator of the each of the one or more single channel analyzer units are dynamically programmable.

23. The gamma detector as recited in claim 20, wherein the upper level discriminator and the lower level discriminator of the one or more single channel analyzer units are dynamically programmable in real time.

24. The gamma detector as recited in claim 20, wherein the computing device further comprises a communication interface for communicating with a computing system.

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27. A single channel analyzer comprising:

i. a dynamically programmable lower level discriminator configured to generate output data for analog signals greater than a programmable level,

ii. an dynamically programmable upper level discriminator configured to generate output data for the analog signals less than a programmable level,

iii. a logic device configured to generate output data for programmable combinations of the output data from the lower and upper level discriminators,

wherein the computing device analyzes the counts and programmatically controls the lower level discriminator and the upper level discriminator with a temporally, or spatially, or both temporally and spatially determined series of programmable levels.

31. The single channel analyzer of claim 27, wherein the counter programmatically counts the output data of the logic device during a programmable period of time, or at a programmable time and for a programmable duration of time.

33. The single channel analyzer of claim 27, wherein the computing device initiates the counter for the counting of the output data of the logic device in a temporal, or spatial relationship to an event'"'"'s time or location, or in a combination thereof.

34. The single channel analyzer of claim 27, further comprising a data storage device, wherein the computing device stores the counts counted by the counter in the data storage device.

37. The single channel analyzer of claim 34, wherein the computing device further analyzes the counts or the stored counts.

39. A analog signal measuring system comprising a plurality of the single channel analyzers as recited in claim 27.

40. The single channel analyzer of claim 27 further comprising

a gamma ray sensing detector for converting gamma ray into an analog signal being communicated to the upper level discriminators and lower level discriminator.

43. The single channel analyzer of claim 40 further comprising a computing system that analyzes the counts to determine spectral information in respect to gamma rays sensed by a gamma ray sensing detector.

44. The single channel analyzer of claim 43, wherein the computing system analyzes the counts to determine possible threats arising from the sensed gamma rays.

45. The single channel analyzer of claim 44, wherein the computing system numerically represents the possible threats.

46. The single channel analyzer of claim 44, wherein the computing system graphically represents the possible threats.

47. The single channel analyzer of claim 44, wherein the computing system comprises information regarding possible threats with conventional or other security sensor information and data for analysis or representation to fuse the data with the security threat information.

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48. A computer implemented system for gamma spectrum analysis, comprising computer implemented module that conducts targeted automated gamma spectroscopy analysis by executing an automatic comparison of the relative intensities of various gamma ray energies or groups of gamma ray energies from within various energy intervals of a gamma ray spectrum, and determines the presence or absence of specific targeted radioactive gamma ray emitting isotope or isotopes.

49. The computing system of claim 48, wherein the analysis comprises one of or both

a. numerical values of the relative intensities of gamma rays in the various energy intervals of the gamma ray spectrum;

and

b. graphical representations of the numerical values of the relative intensities of gamma rays in the various energy intervals of the gamma ray spectrum.