Airplane cabin air quality monitoring system

• US 10,295,457 B1
• Filed: 06/13/2017
• Issued: 05/21/2019
• Est. Priority Date: 06/13/2017
• Status: Active Grant

• Current Assignee: Larry Ocheltree
• Original Assignee: Larry Ocheltree
• Inventors: Ocheltree, Larry
• Primary Examiner(s): Ton, Tri T
• Assistant Examiner(s): Phillips, Rufus L
• Application Number:
  US15/620,884
• Time in Patent Office: 707 Days
• CPC Class Codes: G01N 21/255 Details, e.g. use of specially adapted sources, lighting or optical systems
• CPC Class Codes: G01N 21/274 Calibration, base line adjustment, drift correction
• CPC Class Codes: G01N 21/3504 for analysing gases, e.g. multi-gas analysis
• CPC Class Codes: G01N 33/0031 comprising two or more sensors, e.g. a sensor array

Abstract

The airplane cabin air quality monitoring system comprises a gas monitor. The gas monitor measures the atmosphere within an aircraft for a plurality of potentially hazardous gases. The gas monitor further comprises a plurality of gas sensors, a plurality of compensation sensors, a spectrometer, and a control system. The plurality of gas sensors, the plurality of compensation sensors, the spectrometer, and the control system are electrically interconnected. The control system manages and regulates the operation of the gas monitor. The control system generates an alert if a potentially hazardous gas is detected. The airplane cabin air quality monitoring system further comprises a docking station stores the gas monitor when the gas monitor is not in use. The docking station: 1) recharges the battery of the gas monitor; and, 2) establishes a hardwired first communication link between the gas monitor and the ACARS of the aircraft.

Claims

1. An instrument comprising:

a gas monitor and a docking station;

wherein the docking station stores the gas monitor;

wherein the instrument is a handheld measurement device;

wherein the instrument is configured for use within an aircraft;

wherein the aircraft is further defined with an ACARS and a bulkhead;

wherein the instrument is an integrated test device that measures the atmosphere within the aircraft for a plurality of potentially hazardous gases;

wherein the instrument provides the results of the measurements to a flight crew;

wherein the plurality of potentially hazardous gases comprises one or more chemical substances that are selected from the group consisting of chemical substances that are in a gas phase at normal temperature and pressure conditions;

wherein the gas monitor tests the atmosphere within an aircraft for the plurality of potentially hazardous gases;

wherein the gas monitor further comprises a housing, a plurality of gas sensors, a plurality of compensation sensors, a spectrometer, and a control system;

wherein the plurality of gas sensors, the plurality of compensation sensors, the spectrometer, and the control system are electrically interconnected;

wherein the plurality of gas sensors, the plurality of compensation sensors, the spectrometer, and the control system are contained within the housing;

wherein the control system manages and regulates the operation of the gas monitor;

wherein the control system further collects the measurements taken by the plurality of gas sensors, the plurality of compensation sensors, and the spectrometer;

wherein each of the plurality of gas sensors detects a gas selected from the plurality of potentially hazardous gases;

wherein each of the plurality of compensation sensors measures an environmental condition;

wherein the spectrometer takes spectrometric readings of the atmosphere;

wherein the control system generates an alert if an anomaly is detected in the atmosphere;

wherein the control system stores the spectrometric readings;

wherein the housing is a rectilinear structure;

wherein the housing is a rigid casing within which the balance of the gas monitor is contained;

wherein the housing comprises a shell, a control chamber, a flow chamber, a port, a grip, and a copper foil;

wherein the control chamber, the flow chamber, the port, the grip and the copper foil are contained within the shell;

wherein the control chamber is a segregated chamber formed within the shell;

wherein the control chamber contains the control system;

wherein the port is an electrical connection;

wherein the port transfers electrical power and communication signals between the control system and the ACARS;

wherein the grip is formed in the shell.

2. The instrument according to claim 1

wherein the shell is a rectilinear structure that forms the exterior surface of the housing;

wherein the copper foil is a flexible sheeting formed from copper;

wherein the copper foil lines the interior surfaces of the shell.

3. The instrument according to claim 2

wherein the flow chamber is a segregated chamber formed within the shell;

wherein the flow chamber contains the plurality of gas sensors, the plurality of compensation sensors, and the spectrometer;

wherein during the operation of the instrument gases from the atmosphere are forced through the flow chamber;

wherein the forced air flow provides the gas samples required by the plurality of gas sensors, the plurality of compensation sensors, and the spectrometer.

4. The instrument according to claim 3

wherein the flow chamber comprises an intake vent, an exhaust vent, and a fan;

wherein the intake vent is an aperture formed through the shell;

wherein the exhaust vent is an aperture formed through the shell;

wherein the fan is an electrically powered mechanical device that pumps atmospheric gases through the flow chamber;

wherein the fan is controlled by the control system;

wherein the fan is mounted in the intake vent.

5. The instrument according to claim 4

wherein the plurality of potentially hazardous gases comprises volatile organic compounds, chlorine (CAS 7782-50-5), hydrogen chloride (CAS 7647-01-0), sulfur dioxide (CAS 7446-09-05), hydrogen sulfide (CAS 7783-06-04), oxygen (CAS 7782-44-7), ozone (CAS 10028-15-6), carbon monoxide (CAS 630-08-0), carbon dioxide (CAS 124-38-9), ammonia (CAS 7664-41-7), nitrogen dioxide (CAS 10102-44-0), alkanes, and particulates;

wherein the plurality of gas sensors comprises a TVOC sensor, a chlorine sensor, a hydrogen chloride sensor, a sulfur dioxide sensor, a hydrogen sulfide sensor, an oxygen sensor, an ozone sensor, a carbon monoxide sensor, a carbon dioxide sensor, an ammonia sensor, a nitrogen dioxide sensor, an alkanes sensor, and a particulates sensor;

wherein the TVOC sensor measures the concentration of total volatile organic compounds in the atmosphere;

wherein the chlorine sensor measures the concentration of diatomic chlorine (CAS 7782-50-5) in the atmosphere;

wherein the hydrogen chloride sensor measures the concentration of hydrogen chloride (CAS 7647-01-0) in the atmosphere;

wherein the sulfur dioxide sensor measures the concentration of sulfur dioxide (CAS 7446-09-05) in the atmosphere;

wherein the hydrogen sulfide sensor measures the concentration of hydrogen sulfide (CAS 7783-06-04) in the atmosphere;

wherein the oxygen sensor measures the concentration of diatomic oxygen (CAS 7782-44-7) in the atmosphere;

wherein the ozone sensor measures the concentration of ozone (CAS 10028-15-6) in the atmosphere;

wherein the carbon monoxide sensor measures the concentration of carbon monoxide (CAS 630-08-0) in the atmosphere;

wherein the carbon dioxide sensor measures the concentration of carbon dioxide (CAS 124-38-9) in the atmosphere;

wherein the ammonia sensor measures the concentration of ammonia (CAS 7664-41-7) in the atmosphere;

the nitrogen dioxide sensor measures the concentration of nitrogen dioxide (CAS 10102-44-0) in the atmosphere;

wherein the alkanes sensor measures the concentration of alkanes in the atmosphere;

wherein the particulates sensor measures the concentration of particulates in the atmosphere.

6. The instrument according to claim 5

wherein the plurality of compensation sensors comprises a temperature sensor, a humidity sensor, and a pressure sensor;

wherein the temperature sensor measures the temperature of the atmosphere;

wherein the humidity sensor measures the humidity of the atmosphere;

wherein the pressure sensor measures the pressure of the atmosphere;

wherein the readings collected from the plurality of compensation sensors are used by the control system to adjust the measurements taken by each of the plurality of gas sensors to compensate for known measurement variations created by environmental conditions.

7. The instrument according to claim 6

wherein the spectrometer is an electrical device;

wherein the spectrometer reflects one or more beams of electromagnetic radiation of known frequencies through the atmospheric sample and measures the spectrum of the returned beam;

wherein the spectrometer transmits the measured spectrum of the returned beam to the control system;

wherein the control system performs a spectral analysis on the return beam data.

8. The instrument according to claim 7

wherein the spectrometer comprises a light source, a light sensor, a reflective surface, and a spectral circuit;

wherein the light source comprises one or more LEDs that are incorporated into the spectrometer;

wherein the light source is calibrated to emit electromagnetic radiation at one or more previously determined wavelengths;

wherein the light sensor is a sensor that is calibrated to detect electromagnetic radiation over a range of previously determined frequencies;

wherein the light sensor receives the electromagnetic radiation generated by the light source after the electromagnetic radiation has passed through the atmospheric gas sample;

wherein the reflective surface is a mirrored structure that reflects the light generated by the light source to the light sensor as the generated light is passing through the atmospheric gases;

wherein the spectral circuit is an electrical circuit incorporated into the spectrometer for the purpose of subdividing the received light into spectral ranges for analysis by the logic module.

9. The instrument according to claim 8

wherein the control system is an electrical device;

wherein the control system comprises a logic module, a communication module, a display, a plurality of LEDs, a plurality of switches, a battery and a diode;

wherein the logic module, the communication module, the display, the plurality of LEDs, the plurality of switches, the battery and the diode are electrically interconnected.

10. The instrument according to claim 9

wherein the logic module is a programmable electronic device that manages, regulates, and operates the control system;

wherein the logic module monitors each of the plurality of gas sensors;

wherein the logic module monitors each of the plurality of compensation sensors;

wherein the logic module monitors calculates a compensated concentration level of each of the plurality of potentially hazardous gases based on the readings from both the plurality of gas sensors and the plurality of compensation sensors;

wherein the logic module compares the compensated concentration levels of each of the plurality of potentially hazardous gases against a predetermined exposure level;

wherein the logic module displays the calculated compensated concentration levels for each of the plurality of potentially hazardous gases on the display;

wherein the logic module generates an alert using the plurality of LEDs should a gas selected from the plurality of potentially hazardous gases exceed the predetermined exposure limit;

wherein the logic module transmits the calculated compensation concentration levels to the ACARS;

wherein the logic module monitors the plurality of switches.

11. The instrument according to claim 10

wherein the communication module is a wireless electronic communication device;

wherein the communication module establishes a hardwired first communication link with the ACARS;

wherein the communication module establishes a wireless second communication link in order to transmit data collected from the plurality of gas sensors to the ACARS;

wherein the communication module that allows the logic module to wirelessly communicate with a locally presented personal data device using a third communication link.

12. The instrument according to claim 11

wherein the display is an LCD

wherein the LCD is mounted in the shell;

wherein the logic module uses the LCD to display the calculated compensated concentration levels of each of the monitored gases.

13. The instrument according to claim 12

wherein the battery is a rechargeable battery;

wherein the docking station provides an electrical circuit that reverses the polarity of the battery;

wherein the docking station attaches to the ACARS from which it draws electrical energy;

wherein the diode is an electrical device that allows electric current to flow in only one direction;

wherein the diode is installed between the battery and the docking station such that electricity will not flow from the positive terminal of the battery to the positive terminal of the plug.

14. The instrument according to claim 13

wherein each of the plurality of LEDs is an electrical device;

wherein each of the plurality of switches is an electrical device;

wherein the plurality of LEDs comprises a first LED, a second LED, a third LED, and a fourth LED;

wherein the first LED indicates that the gas monitor is available for operation;

wherein the second LED indicates that the testing procedures are in process;

wherein the third LED indicates that the logic module has generated an alert;

wherein the fourth LED indicates that the logic module has generated an alert that requires immediate attention;

wherein the plurality of switches comprises a first switch, a second switch, and a third switch;

wherein the first switch is a momentary switch;

wherein the first switch instructs the logic module to initiate operation;

wherein the second switch is a momentary switch;

wherein the second switch instructs the logic module to initiate testing operations;

wherein the third switch is a momentary switch;

wherein the third switch is instructs the logic module to transmit the calculated compensated concentration levels, the spectral analysis data, and the alerts to the ACARS and the personal data device.

15. The instrument according to claim 14

wherein the docking station comprises a stanchion, a base, a cap, and a plug;

wherein the stanchion attaches the base to the cap;

wherein the plug attaches to the base;

wherein the docking station is a rectilinear structure;

wherein the docking station stores the gas monitor when not in use;

wherein the docking station recharges the battery during storage of the gas monitor;

wherein the docking station provides the first communication link between the gas monitor and the ACARS.

16. The instrument according to claim 15

wherein the stanchion is a rectangular plate;

wherein the stanchion attaches the base to the cap;

wherein the stanchion attaches to a bulkhead within the aircraft;

wherein the base is a horizontal surface;

wherein the base projects perpendicularly away from the stanchion;

wherein the cap is a horizontal surface;

wherein the cap projects perpendicularly away from the stanchion;

wherein the cap projects in the same direction as the base;

wherein the cap attaches to the end of the stanchion that is distal from the base;

wherein the plug is an electrical termination that is matched to the port of the gas monitor;

wherein the plug electrically connects the gas monitor to the ACARS such that electrical power and data may be exchanged between the gas monitor and the ACARS.