# US 10,768,217 B2 · Electromagnetic effect testing

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- Number: US 10,768,217 B2
- Document ID: US10768217B2
- Status: Granted
- Kind: B2
- Application number: 15/651,540
- Filed: 2017-07-17
- Published: 2017-11-02
- Granted: 2020-09-08
- Earliest claimed: 2014-03-12
- Assignees: The Boeing Company
- Applicants: The Boeing Company
- Inventors: Felix D. Yuen; Andrew M. Robb; Jason P. Bommer
- Web page: https://patentgrep.com/patent/US10768217B2

## CPC

- G01R 31/001: {Measuring interference from external sources to, or emission from, the device under test, e.g. EMC, EMI, EMP or ESD testing (measuring electromagnetic fields G01R29/08; circuits for generating HV pulses in dielectric strength testing G01R31/14)}
- B64F 5/60: Testing or inspecting aircraft components or systems
- G01R 15/181: {using coils without a magnetic core, e.g. Rogowski coils}
- G01R 19/0092: {Measuring current only}
- G01R 31/008: {on air- or spacecraft, railway rolling stock or sea-going vessels}
- H04Q 9/00: Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
- B64D 45/02: Lightning protectors; Static dischargers
- G01R 29/0842: {Measurements related to lightning, e.g. measuring electric disturbances, warning systems}
- G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12)
- B64F: GROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS SPECIALLY ADAPTED FOR USE IN CONNECTION WITH AIRCRAFT; DESIGNING, MANUFACTURING, ASSEMBLING, CLEANING, MAINTAINING OR REPAIRING AIRCRAFT, NOT OTHERWISE PROVIDED FOR; HANDLING, TRANSPORTING, TESTING OR INSPECTING AIRCRAFT COMPONENTS, NOT OTHERWISE PROVIDED FOR
- H04Q: SELECTING (switches, relays, selectors H01H; wireless communication networks H04W)
- B64D: EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT

## Abstract

A device comprises a circuit board, a Rogowski coil on the circuit board, persistent data storage on the circuit board, and a control circuit on the circuit board for collecting values representing current sensed by the coil, and storing the values in the persistent memory.

## Claims

### Claim 1

A method, comprising:
subjecting an aircraft structure to an electromagnetic effect (EME) event comprising an artificial source of EME current;
detecting the EME event on the aircraft structure using EME current sensing devices provided on circuit boards fastened to the aircraft structure;
storing EME current values for a first period immediately preceding the EME event;
storing EME current values for a second period after the EME event has been detected; and
constructing a full current waveform for the EME current values stored during the first and second periods, wherein the full current waveform includes a rise time of current induced by the EME event.

### Claim 2 (depends on 1)

The method of claim 1, in which the EME current sensing devices comprise Rogowski coils configured to generate transient pulses in response to EME current, and in which the EME current values stored during the first and second periods are based on the transient pulses.

### Claim 3 (depends on 2)

The method of claim 2, further comprising reducing noise in the transient pulses by positioning an integration and amplification circuit on each circuit board and proximate the Rogowski coil.

### Claim 4 (depends on 1)

The method of claim 1, in which the structure includes fasteners, and the EME current sensing devices are fastened to the fasteners, wherein detecting the EME event on the structure comprises detecting EME current flowing through the fasteners.

### Claim 5 (depends on 1)

The method of claim 1, further comprising:
storing the full current waveforms in a persistent data storage; and
after the EME event has ended, transmitting the full current waveforms from the persistent data storage to a base computer.

### Claim 6 (depends on 1)

The method of claim 1, further comprising retrieving the stored EME current values for the first period and for the second period after the EME event has ended.

### Claim 7 (depends on 1)

The method of claim 1, in which the EME current sensing devices comprise Rogowski coils provided on circuit boards fastened to the structure, each circuit board including a Rogowski coil surrounding one of the fasteners.