Monitoring system and method for nuclear weapons effects detection and damage assessment

• US 4,827,414 A
• Filed: 07/08/1985
• Issued: 05/02/1989
• Est. Priority Date: 07/08/1985
• Status: Expired due to Fees

• Current Assignee: the united states of america as represented by the secretary of the navy
• Original Assignee: the united states of america as represented by the secretary of the navy
• Inventors: Christianson, Charles L., Hall, Jay S.
• Primary Examiner(s): Smith, Jerry
• Assistant Examiner(s): Hayes, Gail O.
• Application Number:
  US06/752,703
• Time in Patent Office: 1,394 Days
• Field of Search: 250/390 R, 250/336.1, 250/363 R, 276/914, 276/273, 276/247, 276/153-155, 73/714, 73/753-754, 73/35, 374/142, 374/143, 374/121, 364/423
• US Class Current: 250/390.01
• CPC Class Codes: G01S 11/125 using gamma or X-rays
• CPC Class Codes: G08B 19/00 Alarms responsive to two or more different undesired or abnormal conditions, e.g. burglary and fire, abnormal temperature and abnormal rate of flow
• CPC Class Codes: G21J 5/00 Detection arrangements for nuclear explosions individual measuring devices G01

Abstract

A system for detecting a nuclear weapon explosion and assessing damage therefrom comprising a sensor head and an electronic signal processor is disclosed. The sensor head is spherical in shape and comprises a plurality of temperature sensors at different locations on the sensor head and provide information concerning the direction of the radiation. Elapsed time between thermal pulse peaks measure yield of the weapon. A plurality of pressure sensors embedded in the sensor head measure blast overpressure. The time lapse between the temperature and pressure signals measures distance. Gamma and neutron sensors indicate the type of weapon and radiation hazard. The electronic signal processor provides the necessary calculations.

Claims

1. A monitoring system for detecting the effects of a nuclear explosion so as to assess the damage to personnel and property based on certain known characteristics of predetermined signals to be detected, comprising:

a sensor heat for detecting the predetermined signals, said head being spherical in shape; and

an electronic signal processor operatively connected to said sensor head so as to process the predetermined signals according to a predetermined program so as to generate derived quantities from the certain known characteristics of the predetermined signals that can be used to generate derived quantities of blast data to assess damage from the nuclear explosion to property and personnel,

said sensor head further comprising a plurality of temperature sensors strategically disposed about the top half thereof for sensing the thermal effects of the nuclear explosion and to provide information concerning the direction of the radiation.

2. The monitoring system of claim 1 wherein said sensor head further comprises a plurality of pressure sensors strategically disposed about the bottom half thereof and embedded therein for sensing the blast overpressure effects of the nuclear explosion.

3. The monitoring system of claim 2 wherein each one of said pressure sensors of said sensor head comprises:

a plate affixed to the inside surface of said sensor head; and

a strain gauge affixed to said plate such that an incident blast wave from said nuclear explosion will deform and flex said plate in proportion to the intensity thereof, and such that said strain gauge reacts so as to change its resistance thereby indicating the intensity of the wave front.

4. The monitoring system of claim 3 wherein said sensor head further comprises means for sensing the gamma radiation effects of the nuclear explosion disposed strategically about the top half of said sensor head.

5. The monitoring system of claim 4 wherein said means for sensing the gamma radiation effects comprises a low intensity sensor and a high intensity sensor.

6. The monitoring system of claim 5 wherein said sensor head further comprises means for sensing the neutron radiation effects of the nuclear explosion disposed strategically about the bottom half of said sensor head.

7. The monitoring system of claim 6 wherein said means for sensing the neutron radiation effects comprises a low intensity neutron sensor and a high intensity neutron sensor.

8. The monitoring system of claim 7 wherein said electronic signal processor comprises:

a temperature analog-to-digital (A/D) converter operatively connected to said plurality of temperature sensors for converting the purely analog temperature signals generated thereby into a digital representation which is outputted onto a data bus; and

a pressure analog-to-digital (A/D) converter operatively connected to said plurality of pressure sensors for converting the purely analog pressure signals generated thereby into a digital representation which is outputted onto the data bus.

9. The monitoring system of claim 8 wherein said electronic signal processor further comprises:

a gamma counter operatively connected to said means for sensing the gamma radiation;

a neutron counter operatively connected to said means for sensing the neutron radiation; and

a system clock operatively connected to said gamma counter and to said neutron counter such that when clocked at predetermined intervals, said gamma counter counts the signal representative of the gamma radiation, making it available at its output, and such that when clocked at the predetermined intervals, said neutron counter counts the signal representative of the neutron radiation making it available at its output.

10. The monitoring system of claim 9 wherein said electronic signal processor further comprises:

a gamma latch operatively connected at its input to the output of said gamma counter and its output to the data bus;

a neutron latch operatively connected at its input to the output of said neutron counter and at its output to the data bus; and

an address decoder operatively connected at its input to an address bus and at individual outputs to corresponding individual control inputs of said temperature A/D converter, said pressure A/D converter, said gamma latch, and said neutron latch such that addresses at the input of said address decoder are decoded and in response said decoder then pulsing the control inputs according to the addresses.

11. The monitoring system of claim 10 wherein said electronic signal processor further comprises:

a microprocessor operatively connected to the data bus and the address bus;

a read-only memory (ROM) operatively connected to said microprocessor; and

a direct access memory operatively connected to the data bus, to the address bus and to said microprocessor, such that data on the data bus are stored in predetermined locations in said direct access memory for use and computation by said microprocessor as determined by a predetermined program stored in said ROM.

12. The monitoring system of claim 11 wherein said electronic signal processor further comprises:

a keyboard operatively connected to said microprocessor for resetting or initiating operation of said monitoring system;

an alarm unit operatively connected to said microprocessor for sounding an alarm upon the detection of any one of the predetermined signals; and

a display unit operatively connected to said microprocessor for displaying quantities derived from the predetermined signals, such as peak pressure, distance to ground zero and weapon yield, gamma dose and dose rate, neutron dose and dose rate, direction of the nuclear explosion, thermal radiation intensity and the type of weapon.