Methods and systems for incorporating bio-sensors in drones to wirelessly detect biological molecules and hazards

Patent metadata

Field	Value
Publication number	US-10209188-B2
Application number	US-201715801296-A
Country	US
Kind code	B2
Filing date	Nov 1, 2017
Priority date	Nov 2, 2016
Publication date	Feb 19, 2019
Grant date	Feb 19, 2019

Abstract

Exemplary methods and systems for incorporating bio-sensors in drones to wirelessly detect biological molecules and hazards without exposing an operator to harmful contaminants or conditions. Bio-sensors can incorporate simultaneous dual-detection methods to ensure accuracy of measurements. Methods of operation include registering blank and safe air profiles for comparison against unknown air profiles to accurately determine the presence of bio-contaminants in unknown air.

First claim

The invention claimed is:

1. A drone-sensor system comprising:
an unmanned aerial vehicle (UAV) comprising:
a system controller comprising a processor, an input/output (I/O) system, memory, and a first power supply;
a wireless transmitter electronically coupled to the system controller, wherein the wireless transmitter is configured to receive a plurality of instructions from a remote control station and transfer the plurality of instruction to flight control systems, flight sensor systems, and a bio-sensor;
the flight control systems electronically coupled to the system controller, wherein the flight control systems maneuver the UAV based on instructions received from; and
flight sensor systems comprising a video-camera system and an orientation sensor, wherein the flight sensor systems are electronically coupled to the system controller;

a bio-sensor comprising:
a sampling chamber comprising a cell forming a first cavity section, a first and second aperture on a first and second end, respectively, a third and fourth aperture, a reflective filter, and a reflective coating;
a laser diode configured to generate and direct a laser beam at a first wavelength through the third aperture into the sampling chamber and through the fourth aperture out of the sampling chamber, wherein the reflective filter is reflective to the first wavelength, wherein as a first optical path of the laser beam passes through the sampling chamber, the first optical path reflects off of the reflective coating and reflective filter at least once each;
a first spectral filter;
a fluorescence detector configured to detect a second wavelength and generate a first plurality of detection signals;
a second spectral filter that allows the first wavelength to pass through;
an absorption detector configured to detect the first wavelength and generate a second plurality of detection signals;
a signal controller configured to receive the plurality of instructions from the system controller and transmit the first and second pluralities of detection signals to the system controller; and
a pump, wherein the pump draws air into the sampling chamber through the first aperture and draws air out of the sampling chamber through the second aperture;
wherein when the laser beam hits biomolecules in the sampling chamber, the wavelength of the laser beam changes to the second wavelength; wherein the reflective filter and the first spectral filter allow the second wavelength to pass through to the fluorescence detector;
wherein when the laser beam is not absorbed by biomolecules in the sampling chamber, the laser beam passes through the second spectral filter to the absorption detector; and

a housing structure comprising:
an exterior and interior wall;
a plurality of heat sinks; and
at least one thermal-electric cooling module;
wherein the interior wall forms a second cavity section, wherein the bio-sensor is within the second cavity section, wherein the bio-sensor is mechanically coupled to the housing structure, wherein each of the at least one thermal-electric cooling modules is in contact with the bio-sensor, wherein the plurality of heat sinks are in contact with the at least one thermal-electric cooling module, wherein heat generated by the bio-sensor is transferred to the plurality of heat sinks through the at least one thermal-electric cooling module, wherein heat in the plurality of heat sinks is dissipated to surrounding air through convective heat transfer, wherein the housing structure is mechanically coupled to the UAV.

2. The system of claim 1 , wherein the bio-sensor is electrically coupled to the UAV such that the first power supply powers the bio-sensor.

3. The system of claim 1 , wherein the laser diode, the fluorescence detector, the absorption detector, and the pump are powered by a second, a third, a fourth, and a fifth power supply, respectively.

4. The system of claim 1 , wherein the bio-sensor further comprises:
an air inlet funnel comprising a funnel section and a tube section, further comprising plurality of baffle on an interior surface of the tube section.

5. The system of claim 1 , wherein the flight sensor systems further comprise a GPS system comprising a GPS receiver.

6. A method of detecting bio-molecules comprising:
providing an unmanned aerial vehicle comprising a bio-sensor;
drawing clean air through an air inlet into the bio-sensor with a suction pump;
measuring the clean air and recording a first plurality of measurement data to a blank profile;
directing the UAV to a known uncontaminated area;
drawing known air through the air inlet into a bio-sensor with the suction pump;
measuring the known air in the known uncontaminated area and recording a second plurality of measurement data to a first evaluation profile;
directing the UAV to area of interest;
drawing unknown air through the air inlet into a bio-sensor with the suction pump;
measuring unknown air and recording a third plurality of measurement data to a second evaluation profile; and
comparing the first evaluation profile with the second evaluation profile to determine presence of biological contaminants.

7. The method of claim 6 , further comprising:
cleansing the bio-sensor with a high purity methyl alcohol solution after recording the third plurality of measurement data;
removing and replacing the suction pump with a new pump after recording the third plurality of measurement data.

8. A method of detecting bio-molecules comprising:
providing a drone-sensor system comprising:
an unmanned aerial vehicle (UAV) comprising:
a system controller comprising a processor, an input/output (I/O) system, memory, and a first power supply
a wireless transmitter electronically coupled to the system controller, wherein the wireless transmitter is configured to receive a plurality of instructions from a remote control station and transfer the plurality of instruction to flight control systems, flight sensor systems, and a bio-sensor;
the flight control systems electronically coupled to the system controller, wherein the flight control systems maneuver the UAV based on instructions received from; and
flight sensor systems comprising a video-camera system and an orientation sensor, wherein the flight sensor systems are electronically coupled to the system controller;

a bio-sensor comprising:
a sampling chamber comprising a cell forming a first cavity section, a first and second aperture on a first and second end, respectively, a third and four aperture, a reflective filter, and a reflective coating;
a laser diode configured to generate and direct a laser beam at a first wavelength through the third aperture into the sampling chamber and through the fourth aperture out of the sampling chamber, wherein the reflective filter is reflective to the first wavelength, wherein as a first optical path of the laser beam passes through the sampling chamber, the first optical path reflects off of the reflective coating and reflective filter at least once each;
a first spectral filter;
a fluorescence detector configured to detect a second wavelength and generate a first plurality of detection signals;
a second spectral filter that allows the first wavelength to pass through;
an absorption detector configured to detect the first wavelength and generate a second plurality of detection signals;
a signal controller configured to receive the plurality of instructions from the system controller and transmit the first and second pluralities of detection signals to the system controller; and
a pump, wherein the pump draws air into the sampling chamber through the first aperture and draws air out of the sampling chamber through the second aperture;
wherein when the laser beam hits biomole

Assignees

• Us Navy

Inventors

• Ng Kin Chiu
• Sanyal Subrata

Classifications

• B64U10/13

  Flying platforms · CPC title

• G01N21/636 Primary

  using an arrangement of pump beam and probe beam; using the measurement of optical non-linear properties; (non-linear optics per se G02F1/35) · CPC title

• G01N2021/6491

  Measuring fluorescence and transmission; Correcting inner filter effect · CPC title

• G01D21/02

  Measuring two or more variables by means not covered by a single other subclass · CPC title

• G01N2021/6415

  with two excitations, e.g. strong pump/probe flash · CPC title