Apparatus and electric primer output data testing method

Patent metadata

Field	Value
Publication number	US-9618309-B2
Application number	US-201514698738-A
Country	US
Kind code	B2
Filing date	Apr 28, 2015
Priority date	Apr 28, 2014
Publication date	Apr 11, 2017
Grant date	Apr 11, 2017

Abstract

Exemplary methods and apparatus for testing an electrically fired item, e.g., a primer-only cartridge or all-up round (AUR) cartridge, in a variety of modes are provided. For example, a test system may provide a method of testing a primer-only cartridge and an apparatus to execute such method. Various parameters associated with operation of the electrically fired item, such as a primer or initiator, may be varied and measured using an embodiment including programmable selection of a pulse duration for firing control signals, a voltage of the firing control signals, and a number of pulses associated with the firing control signals. An inline resistance of the path of the control signals may also be adjusted. Test data including temperature, pressure, voltage, and/or current associated with operation of the electrically fired item may be measured during tests and displayed on a display device.

First claim

The invention claimed is:

1. A system comprising:
at least one processor;
a first section including a testing apparatus adapted to hold and initiate an electrically initiated gas generator initiator;
a second section coupled to said testing apparatus and operable to generate and selectively control an electrical firing signal to said initiator based on a plurality of firing signal input parameters, wherein said plurality of firing signal input parameters comprise a voltage of the electrical firing signal and at least one of a pulse duration of the electrical firing signal and a number of pulses of the electrical firing signal;
a third section comprising an input/output section including a user interface, said user interface including a display adapted to display a graphical user interface;
a fourth section comprising a test fixture and an electrical characteristic measurement section operable to measure a plurality of parameters including voltage and current associated with said electrical firing signal, wherein said test fixture comprises a housing adapted to couple to said testing apparatus, wherein said fourth section further includes at least one of a pressure sensor and a temperature sensor coupled to said test fixture, wherein said test fixture includes at least one internal port for receiving said at least one of the pressure sensor and the temperature sensor, said electrically initiated gas generator initiator being positioned in the housing of the test fixture; and
a machine instruction storage section comprising a plurality of machine readable instructions that when executed by the at least one processor cause the at least one processor to:
generate a test selection prompt requesting a user to select one of a first test and a second test and configure at least said second section based upon a user selection of said first test;
obtain said plurality of firing signal input parameters and configure at least said second section for said first test based on said plurality of firing signal input parameters; and
execute said first test by generating a first user control trigger prompt, initiating sending a first firing activation signal to said second section in response to a user selection of said first user control trigger prompt, and collecting said plurality of parameters from said fourth section generated during said first test, displaying a graphical interface section on said display comprising electrically initiated gas generator initiator data, said electrically initiated gas generator initiator data including temperature and pressure generated during said first test.

2. A test system as in claim 1 , wherein the plurality of machine readable instructions when executed by the at least one processor further cause the at least one processor to
obtain a second plurality of firing signal input parameters and configure said second section for said second test based on said second plurality of firing signal input parameters; and
execute said second test by generating a second user control trigger prompt, initiate sending a second firing activation signal to said second section in response to a user selection of said second user control trigger prompt, and displaying a graphical user interface section on said display comprising voltage data and current data, wherein said voltage data comprises voltage over time and said current data comprises current over time of said electrical firing signal applied to a second electrically initiated gas generator initiator.

3. A test system as in claim 1 , further comprising a resistance adjustment section electrically coupled between a source of said electrical firing signal and said initiator, said resistance adjustment section being operable to adjust a voltage of said electrical firing signal applied to the initiator.

4. A test system as in claim 1 , wherein the plurality of machine readable instructions when executed by the at least one processor cause the at least one processor to adjust said voltage of said electrical firing signal.

5. A test system as in claim 1 , wherein said electrically initiated gas generator initiator comprises a primer operable to initiate a propellant charge.

6. A test system as in claim 1 , further comprising a firing safety section operable to electrically isolate said second section from said electrically initiated gas generator initiator.

7. A test system as in claim 1 , wherein said second section comprises a function generator that receives said first or second firing activation signal and said plurality of parameters, said second section further comprises a high speed, high voltage switch coupled between said function generator and said electrically initiated gas generator initiator, said switch being operated to output said electrical firing signal to said initiator.

8. A test system comprising:
at least one processor;
a first section comprising a holder adapted to hold an electrically activated gas generator initiator positioned within a gas generator charge housing, said initiator being activated by application of at least one firing control signal;
a second section comprising a power supply, a function generator, and a switch operable to selectively generate said at least one firing control signal based on a plurality of firing signal input parameters;
a third section comprising test instrumentation operable to measure at least one of a pressure output and a temperature output from said gas generator initiator and to measure at least one of current data and voltage data during a test;
a fourth section including an input/output section operable to receive user inputs and to output a plurality of outputs; and
a fifth section comprising a machine readable storage section adapted to store a plurality of machine readable instructions operable for controlling said test system, wherein said plurality of machine readable instructions when executed by the at least one processor cause the at least one processor to:
receive a plurality of user inputs including user selection of a type of test and said plurality of firing signal input parameters, and perform an initial configuration of at least said second section based on said plurality of firing signal input parameters;
execute said test by operating said second section to generate said at least one firing control signal so as to activate said initiator and by operating said third section to collect said at least one of the pressure output and the temperature output and the at least one of current data and voltage data during activation of said initiator; and
provide graphical user interface data to said fourth section for displaying said at least one of the pressure output and the temperature output and the at least one of current data and voltage data generated during said test.

9. A test system as in claim 8 , wherein said gas generator initiator is an electric primer operable to initiate a propellant charge.

10. A test system as in claim 8 , wherein said switch of said second section is operable to generate a voltage associated with said at least one firing control signal in a range from 30 volts to 300 volts, and said switch is operable to generate an electrical pulse associated with said at least one firing control signal having a duration ranging from one microsecond to one thousand microseconds.

11. A test system as in claim 8 , wherein said plurality of firing signal input parameters comprise voltage amplitude and at least one of a duration of voltage generation and a number of generated pulses.

12. A test system as in claim 8 , wherein said switch is operated by said function generator based on at least one of said plurality of firing

Assignees

• Us Navy

Inventors

• Barthold Frederick L
• Deckard Gregory
• Coy Terry J
• Raley Thomas

Classifications

• F42C19/12

  electric · CPC title

• F41A19/58

  Electric firing mechanisms (F41A17/10, F41A17/12 take precedence) · CPC title

• F42C21/00 Primary

  Checking fuzes; Testing fuzes · CPC title

• F41A19/57

  Firing mechanisms operating with primer cartridge · CPC title

• G01L23/00

  Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid · CPC title