L-3 Communications Security and Detection Systems, Inc.
대리인 / 주소
Fish & Richardson P.C.
인용정보
피인용 횟수 :
2인용 특허 :
11
초록▼
Concentrating particles in a turbulent gas flow may include receiving, in a receptacle, a turbulent gas flow that includes particles. The concentration of particles in a gas flow exiting the receptacle at a first port is increased as compared with a concentration of the particles in the gas flow rec
Concentrating particles in a turbulent gas flow may include receiving, in a receptacle, a turbulent gas flow that includes particles. The concentration of particles in a gas flow exiting the receptacle at a first port is increased as compared with a concentration of the particles in the gas flow received by the receptacle. The increased concentration of particles is accomplished by removing a portion of the gas flow by using a second port, and fluidly communicating the gas flow through a tube in the receptacle. The tube has a smaller diameter at the end of the tube at which the gas flow exits the tube than diameter at the end of the tube at which the gas flow is received.
대표청구항▼
1. An apparatus for collecting particles from a gas flow comprising: a receptacle including: a cone section comprising a first inlet and a first outlet, wherein: the cone section is configured to receive a non-condensable, turbulent gas flow, the gas flow including particles of matter,a diameter of
1. An apparatus for collecting particles from a gas flow comprising: a receptacle including: a cone section comprising a first inlet and a first outlet, wherein: the cone section is configured to receive a non-condensable, turbulent gas flow, the gas flow including particles of matter,a diameter of the first inlet of the cone section is greater than diameter of the first outlet of the cone section;the cone section is configured to fluidly communicate gas from the first inlet to the first outlet; andan outlet tube comprising a second inlet and a second outlet and being separated from the cone section by a gap, the gap enabling a first portion of the gas flow to exit the receptacle through a bypass output port, and the gap being between the first outlet of the cone section and the second inlet of the outlet tube, such that the first outlet opens to the gap and the gap separates the cone section and the outlet tube along a direction of gas flow. 2. The apparatus of claim 1 wherein the gas flow is a gas flow of at least two liters per second. 3. The apparatus of claim 1, wherein the cone section is a first cone section, further comprising: a second cone section comprising a third inlet and a third outlet, wherein: the first cone section is configured to receive the gas flow only after the gas flow has passed through the second cone section,a diameter of the third inlet of the second cone section is greater than diameter of the third outlet of the cone section,the second cone section is configured to fluidly communicate gas from the second inlet to the first second outlet,the second cone section being separate from the first cone section by a second gap, the second gap enabling a second portion of the gas flow to exit the receptacle through the bypass output port, and the second gap being between the third outlet of the second cone section and the first inlet of the first cone section, such that the third outlet of the second cone section opens to the second gap and the second gap separates the first cone section and the second cone section along a direction of gas flow; anda sample output port configured to receive a third portion of the gas flow only after the gas flow has passed through the outlet tube. 4. The apparatus of claim 3 further comprising an input tube connected to the second cone section and configured to receive the gas flow before the gas flow is received by the second cone section. 5. The apparatus of claim 4 further comprising a straight tube having substantially the same diameter at each end of the tube, the straight tube connected to the first cone section and configured to receive the gas flow only after the gas flow has passed through the second cone section and before the gas flow is received by the first cone section. 6. The apparatus of claim 3 wherein the apparatus further comprises a particle collector configured to receive the gas flow only after the gas flow has passed through the outlet tube and to hold particles from the gas flow. 7. The apparatus of claim 6 wherein the particle collector is a low-porosity mesh or fiber. 8. The apparatus of claim 4 further comprising one or more gas flow sources join fluid communication with the sample output port and the bypass output port such that the gas flow is forced from the input tube to the sample output port and the bypass output port. 9. The apparatus of claim 3 wherein vacuum pressure of the second and third portions of the gas flow at the bypass output port is equal to or greater than vacuum pressure of the third portion of the gas flow at the sample output port. 10. The apparatus of claim 3 wherein volume of the first portion of the gas flow and the second portion of the gas flow at the bypass output port is greater than volume of the third portion of the gas flow at the sample output port. 11. The apparatus of claim 3 wherein the second portion of the gas flow at the bypass output port includes fewer particles of matter than the third portion of the gas flow at the sample output port. 12. The apparatus of claim 3 wherein the third portion of the gas flow at the sample output port includes more particles of matter per unit of flow than the gas flow received by the second cone section. 13. The apparatus of claim 1 wherein the gap comprises a ring, the ring comprising a ring wall defining a plurality of holes enabling the first portion of the gas flow to flow into the receptacle and to exit the receptacle through the bypass output port. 14. The apparatus of claim 13 wherein the plurality of holes are arranged in one or more rows of holes. 15. The apparatus of claim 1 wherein the gas flow comprises one or more of air, natural gas, propane, or a Freon gas. 16. The apparatus of claim 1 wherein the receptacle includes multiple input tubes, an input tube being configured to receive gas. 17. The apparatus of claim 1 further comprising a ring that substantially surrounds the gap. 18. The apparatus of claim 17 wherein the ring comprises multiple holes. 19. The apparatus of claim 17 wherein the ring is configured to receive the first outlet of the cone section and the second outlet of the outlet tube. 20. The apparatus of claim 1 wherein the diameter of the second inlet of the output tube is larger than the first outlet of the cone section. 21. The apparatus of claim 1 wherein the receptacle includes three or more cone sections, each of the cone sections comprising an inlet and an outlet, a diameter of the inlet being greater than a diameter of the outlet, and wherein the three or more cone sections are arranged in a sequence such that any two of the cone sections are separated by a respective gap, each respective gap enabling a respective portion of the gas flow to exit the receptacle through the bypass output port, and each respective gap being between an outlet of one cone section and an inlet of a subsequent cone section in the sequence, such that the outlet of the one cone section opens to the respective gap and the respective gap separates the one cone section and the subsequent cone section along a direction of gas flow. 22. The apparatus of claim 1, wherein the gap enables the first portion of the gas flow to flow into the receptacle and to exit the receptacle through the bypass output port. 23. The apparatus of claim 3 wherein the diameter of the first inlet of the first cone section is larger than the third outlet of the second cone section. 24. The apparatus of claim 3 wherein the first and second cone sections are of similar shape. 25. The apparatus of claim 4 further comprising one or more gas flow sources connected to the input tube, the gas flow sources providing the gas flow. 26. The apparatus of claim 8 wherein the gas flow provided by the gas flow sources is substantially equal to a sum of the first, second, and third portions of the gas flow. 27. A detection system comprising: a space configured to receive a target to be screened;a particle concentrator comprising: a cone section comprising a first inlet and a first outlet, wherein: the cone section is configured to receive a non-condensable, turbulent gas flow from the space, the gas flow including particles of matter,a diameter of the first inlet of the cone section is greater than diameter of the first outlet of the cone section;the cone section is configured to fluidly communicate gas from the first inlet to the first outlet; andan outlet tube comprising a second inlet and a second outlet and being separated from the cone section by a gap, the gap enabling a first portion of the gas flow to exit the particle concentrator through a bypass output port, and the gap being between the first outlet of the cone section and the second inlet of the outlet tube, such that the first outlet opens to the gap and the gap separates the cone section and the outlet tube along a direction of gas flow; anda particle collector configured to receive gas from the second outlet. 28. The detection system of claim 27 wherein the target comprises luggage. 29. The detection system of claim 27 wherein the target comprises a person or an object in contact with a person. 30. The detection system of claim 27 further comprising an analyzer configured to determine whether a particle collected on the particle collector comprises an energetic material.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (11)
Burghoffer Patrick (Lognes FRX) Pourprix Michel (Montlhery FRX) Poussier Patrick (Vincennes FRX), Aerosol sampler with cascade impaction and uniform deposition.
Verdier, Amandine; Sorel, Emmanuelle; Vallayer, Bruno; Rebuffat, Denis, Device for collecting and separating particles and microorganisms present in ambient air.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.