Fast-risetime magnetically coupled current injector and methods for using same
First Claim
1. An apparatus for injecting simulated interference signals into a component of a system under test, comprising:
- signal generation means for electromagnetically introducing a predetermined high power waveform in the component of the system under test, said signal generating means comprising a plurality of modular inductive units each inductively coupled to the system under test in parallel, each modular unit activatable by an input signal applied to a control input thereof to generate a predetermined output function, where at least two said modular inductive units generate output functions with differing frequency components, and where said generated output functions of said plurality of units combine to produce said simulated interference signal to induce said predetermined high power waveform in said component of the system under test; and
control means connected to said control input of said units for simultaneously activating said plurality of inductive devices to inject said combined simulated interference signal into said system under test.
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Accused Products
Abstract
An electromagnetic test system induces large current pulses in a component of a system under test. The pulse waveform may be selectively varied, and possible waveforms include square wave pulse, double exponential, and damped sinusoid waveforms. In a preferred embodiment, these waveforms are generated by simultaneously triggering a plurality of modular signal injector units having ferrite cores hinged to permit positioning of a system component under test (such as a cable or antenna) along their central axes without disturbing connections of the tested component within its system. The injector units are resonance tuned to induce a particular signal in the component under test when triggered, and the modular construction of the system permits selective connection of different injector units to provide different desired total induced signals.
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Citations
48 Claims
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1. An apparatus for injecting simulated interference signals into a component of a system under test, comprising:
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signal generation means for electromagnetically introducing a predetermined high power waveform in the component of the system under test, said signal generating means comprising a plurality of modular inductive units each inductively coupled to the system under test in parallel, each modular unit activatable by an input signal applied to a control input thereof to generate a predetermined output function, where at least two said modular inductive units generate output functions with differing frequency components, and where said generated output functions of said plurality of units combine to produce said simulated interference signal to induce said predetermined high power waveform in said component of the system under test; and control means connected to said control input of said units for simultaneously activating said plurality of inductive devices to inject said combined simulated interference signal into said system under test. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A method of testing the resistance of a system under test to injected interference signals, comprising the steps of:
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providing a computer system, a plurality of modular signal injection units that generate individual injection signals, and a response sensing means for sensing the response of the system under test to injected interference signals, where at least two of the modular signal injection units generate predetermined injection signals with differing frequency components; inductively coupling the modular signal injection units in parallel to a component of the system under test; activating the modular signal injection units at the same time to inject a predetermined signal into the system under test, so that the injection signals of the individual modular signal injection units combine to inject said predetermined signal into said component of the system under test automatically collecting data upon activation of the modular signal injection units, using the computer system and the response sensing means, said data defining the response of the system under test to the injected signals; and automatically analyzing the data, using the computer system, relative to a predetermined performance standard to produce an output indicating whether the response of the system under test to the injected signal meets the predetermined performance standard. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45)
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46. An apparatus for injecting simulated interference signals into a component of a system under test, comprising:
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signal generation means for electromagnetically introducing a predetermined high power waveform in the component of the system under test, said signal generating means comprising a plurality of modular inductive units each coupled to the system under test, and activatable by an input signal applied to a control input thereof to generate a predetermined output function, where said generated output functions of said plurality of units combine to produce said simulated interference signal to induce said predetermined high power waveform in the component of the system under test; and control means connected to said control inputs of said units for simultaneously activating said plurality of inductive devices to inject said combined simulated interference signal into said system under test, wherein there are n modular signal injection units i=1 to n, each producing as an output a sinusoidal signal at a frequency equal to ki-1 f0, where i is the number of the modular signal injection unit, f0 is a base output frequency of the first modular signal injection unit, and k is a constant. - View Dependent Claims (47, 48)
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Specification